Method for manufacturing roll body and roll body

Abstract

To provide a method for manufacturing a roll body capable of effectively reducing a step caused by a winding start end of a sheet, and to provide such a roll body.SOLUTION: According to one aspect of the present invention, there is provided a method for manufacturing a roll body, which is a method for manufacturing a roll body 10 including a core 11 and a long sheet 12 wound around an outer peripheral surface 11A of the core 11, the method including: applying a coating material 18 to the outer peripheral surface 11A of the winding core 11 along a width direction of the winding core 11, arranging a winding start end 12A of the sheet 12 in a longitudinal direction DR2 on the outer peripheral surface 11A; and winding the sheet 12 around the core 11 and filling at least a first gap 13 with the coating material 18, in which the application of the coating material 18 or the arrangement of the winding start end 12A is performed so that the coating material 18 contacts or is close to a tip surface 12A1 located in the longitudinal direction DR2 of the winding start end 12A, and the first gap 13 is a gap located between the winding core 11 and the first turn of the sheet 12 and in contact with the tip surface 12A1.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a method for producing a roll body and a roll body. [Background technology]

[0002] From the viewpoint of production efficiency, sheets such as films are produced in a certain amount at once and rolled on a core. It is often wound and stored as a roll. Specifically, the first turn of the sheet is wound around the second turn of the sheet. When the image is transferred to the eye, a step occurs, and the step appears on the second and subsequent laps. Depending on the type of sheet, if this step occurs, the sheet may deform and may not return to its original shape. There are also.

[0003] Currently, a highly cushioning tape such as urethane resin is applied to the outer circumference of the core. By attaching or embedding the sheet in the cushion tape, the above step can be eliminated. For example, there is a technique to reduce the strain on the winding core by using rubber on the outer periphery. A technology that reduces the step by embedding the sheet in the roll, or A technique has been proposed in which a resilient cushioning material is provided on the outer peripheral surface of the core along the tip (for example, , see Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2005-75521 A [Patent Document 2] JP 2013-199355 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, none of the above techniques can effectively reduce the step height at present. be.

[0006] When winding the sheet around the core, first, a fixing member such as double-sided tape is attached to the outer periphery of the core. A part of the sheet (for example, the beginning end of the roll) is fixed by attaching a fixing member. This may result in a step difference.

[0007] The present invention has been made to solve the above problems. A method for manufacturing a roll body capable of effectively reducing a step caused by a roll end and such a roll body Another object of the present invention is to provide a roll that can effectively reduce the step caused by the fixing member. The present invention aims to provide a method for manufacturing such a roll body. [Means for solving the problem]

[0008] The present invention includes the following inventions. [1] Manufacturing a roll body having a core and a long sheet wound around the outer peripheral surface of the core The method includes applying a coating material to the outer peripheral surface of the core along a width direction of the core. a step of placing a winding start end of the sheet in the longitudinal direction on the outer circumferential surface; and rolling the sheet to fill at least the first gap with the coating material. The application of the coating material or the arrangement of the winding start end is such that the coating material is The first gap is formed so as to contact or be close to the tip surface located in the longitudinal direction of the A gap is located between the core and the first turn of the sheet and in contact with the tip surface. method.

[0009] [2] Manufacturing a roll body having a core and a long sheet wound around the outer peripheral surface of the core The method includes the steps of: placing a winding start end of the sheet in a longitudinal direction on the outer circumferential surface; a step of winding the sheet around a core at least once to obtain an intermediate roll body having a first gap; and a surface of the sheet constituting the outer peripheral surface of the intermediate roll body is provided with a tape along the width direction of the core. applying a coating material to the sheet by applying the coating material to the core; and applying the sheet to the core after applying the coating material. and a step of winding the sheet again to interpose the coating material between the sheets, wherein the first gap is located between the core and the first turn of the sheet, and the length at the winding start end is The gap is in contact with the tip surface of the intermediate roll body located in the hand direction, and the coating material is A first region corresponding to the first gap on the surface of the sheet constituting the outer peripheral surface is coated with the Distributed, manufacturing method.

[0010] [3] Manufacturing a roll body having a core and a long sheet wound around the outer peripheral surface of the core. The method includes applying a portion of the sheet to the outer peripheral surface of the core along a width direction of the core. a first end surface extending in the width direction of the winding core for fixing to the winding core, and a step of disposing a fixing member having a second end surface on the opposite side to the winding core along the width direction of the winding core; applying a coating material to the outer peripheral surface of the core by using the fixing member; a step of fixing a part of the sheet to the core; applying the coating material and attaching the sheet to the core; After fixing a part of the sheet, the sheet is wound around the core to fill the second gap and the third gap. and filling at least one of the coating materials into the coating material. The fixing member is disposed such that the coating material is located on the first end surface side or the second end surface side, The coating material is applied so as to be in contact with or in close proximity to the first end surface or the second end surface. Alternatively, the coating material is located on each of the first end surface side and the second end surface side, or and the coating material is applied so as to be in contact with or in close proximity to the first end surface and the second end surface. The second gap is located between the core and the first turn of the sheet and is in contact with the first end surface. the third gap is located between the core and the first turn of the sheet, and the gap adjacent to the second end surface.

[0011] [4] Manufacturing a roll body having a core and a long sheet wound around the outer peripheral surface of the core The method includes applying a portion of the sheet to the outer peripheral surface of the core along a width direction of the core. a first end surface extending in the width direction of the winding core for fixing to the winding core, and and disposing a fixing member having a second end surface on the opposite side to the first end surface; A step of fixing a part of the sheet to the core; and winding the sheet around the core at least once. obtaining an intermediate roll body having a second gap and a third gap; A coating material is applied to the surface of the sheet constituting the peripheral surface along the width direction of the core. and rewinding the sheet around the core after the coating material is applied. the second gap is located between the core and the sheet of the first turn, and the fixing member the third gap is a gap between the core and the first turn of the sheet, a gap located between the first end surface and the second end surface of the fixing member, and the coating material is In the second gap on the surface of the sheet constituting the outer circumferential surface of the intermediate roll body, The coating is applied to at least one of the corresponding second region and the third region corresponding to the third gap. A manufacturing method.

[0012] [5] The coating material according to any one of [1] to [4] above, wherein the coating material has fluidity. Manufacturing method.

[0013] [6] Any of the above [1] to [5], wherein the coating material is a curable polymer composition. The method for producing the present invention described in claim 1.

[0014] [7] The coating material includes a coloring material or a light-emitting material, as described above in any one of [1] to [6]. The method for producing a product according to any one of the preceding claims.

[0015] [8] Any one of the above [1] to [6], wherein the sheet has a resin film. The manufacturing method described above.

[0016] [9] The sheet is made of an acrylic resin, a polyester resin, or a cycloolefin polymer. The method according to any one of [1] to [7] above, comprising a polymer-based resin.

[0017]

[10] The thickness of the sheet is 15 μm or more and 300 μm or less, [8] or [9] above.

[0033] A manufacturing method according to the present invention.

[0018]

[11] The sheet is a laminate having a substrate and one or more functional layers laminated on the substrate. The method for producing a compound according to any one of the above [1] to

[10] ,

[0019]

[12] The sheet according to any one of the above [1 The manufacturing method according to any one of claims 1 to 11.

[0020]

[13] A roll body comprising a core and a long sheet wound around the outer peripheral surface of the core. The sheet is wound around the core and the first turn of the sheet. a first gap in contact with a tip end surface located in the longitudinal direction at a winding start end in the longitudinal direction; a first filling portion filling one gap and extending in the width direction of the winding core.

[0021]

[14] A first winding member is provided between the winding core and the first turn of the sheet and extends in the width direction of the winding core. a second end surface opposite to the first end surface, and a second end surface opposite to the first end surface, a fixing member for fixing a part of the sheet, and a fixing member for fixing the part of the sheet, the fixing member being located between the core and the first turn of the sheet and fixing the fixing member; a second gap is located between the first end surface of the member, the core, and the first turn of the sheet; a third gap contacting the second end surface of the fixing member; and a second gap filling the second gap and a second filling portion extending in the width direction of the winding core, and a third filling portion filling the third gap and extending in the width direction of the winding core; and at least one third filling portion extending in the direction of the cross-section. Roll body.

[0022]

[15] A roll body comprising a core and a long sheet wound around the outer circumferential surface of the core. The sheet is wound around the core and the first turn of the sheet. a first gap in contact with a tip surface located in the longitudinal direction at a winding start end in the first turn direction; provided in a first region corresponding to at least the first gap between the subsequent sheets, and a first intermediate portion extending in the width direction of the winding core.

[0023]

[16] A roll body comprising a core and a long sheet wound around the outer circumferential surface of the core. A first end portion is provided between the core and the first turn of the sheet and extends in the width direction of the core. a first end surface and a second end surface opposite to the first end surface, and a fixing member for fixing the sheet; and a fixing member for fixing the sheet. a second gap in contact with the first end surface of the winding core and a first turn of the sheet; and a third gap in contact with the second end surface of the fixing member; a second filling portion extending in the width direction of the core, and a third filling portion filling the third gap and extending in the width direction of the core; and at least one of the third filling sections extending from the first filling section to the second filling section.

[0024]

[17] A roll body comprising a core and a long sheet wound around the outer peripheral surface of the core. A first end portion is provided between the core and the first turn of the sheet and extends in the width direction of the core. a first end surface and a second end surface opposite to the first end surface, and a fixing member for fixing the sheet; and a fixing member for fixing the sheet. a second gap in contact with the first end surface of the winding core and a first turn of the sheet; and A third gap contacting the second end surface of the fixing member and a gap between the sheets from the first turn onward, a second intermediate portion provided in a second region corresponding to the second gap and extending in the width direction of the winding core; and a third region corresponding to the third gap between the sheets in the first or subsequent rounds. and at least one third intermediate portion extending in the width direction of the winding core. Ru type.

[0025]

[18] A sheet is provided between the first filling section and the second filling section. The roll body according to the above

[13] or

[14] , further comprising a fourth intermediate portion interposed therein.

[0026]

[19] A sheet is provided between the first filling section and the second filling section. In the case where the fourth intermediate portion is not present, the first filling portion is in contact with the tip surface of the first filling portion. The thickness T2 at the position where the sheet is filled in the first filling portion along the longitudinal direction When the ratio of the length L1 is 90 or more and the fourth intermediate portion is present, the first filling portion The thickness T2 at the position in contact with the tip surface of the first filling portion The length L1 of the sheet along the longitudinal direction of the fourth intermediate portion The ratio of the total length L2 along the direction to the total length L3 along the direction is 90 or more, The roll body according to any one of claims 1 to 5.

[0027]

[20] When the fourth intermediate portion does not exist, the thickness T2 of the first filling portion of the winding core in a plane including the longitudinal direction of the sheet and the radial direction of the winding core The ratio of the area S1 of the region sandwiched between the outer peripheral surface and the surface of the first filling portion is 3.0 or more, When the fourth intermediate portion is present, the thickness T2 of the first filling portion is The outer peripheral surface of the winding core and the first winding core in a plane including the longitudinal direction of the winding core and the radial direction of the winding core The area S1 of the region sandwiched by the surface of the filling portion and the area S2 of the outer peripheral surface of the winding core and the fourth intermediate portion The ratio of the total area S2 of the area sandwiched between the surfaces to the total area S2 of the area sandwiched between the surfaces is 3.0 or more. Roll body.

[0028]

[21] When the thickness of the second intermediate portion is measured along the longitudinal direction of the sheet, The fixing in the second intermediate portion in the longitudinal direction with respect to the maximum thickness T6 of the intermediate portion A position from a second end on the opposite side to the first end on the member side to the maximum thickness T6 of the second intermediate portion The ratio of the length L4 to the position from the end of the roll to the end of the tensioner is 12 or more.

[0029]

[22] The longitudinal direction and the winding direction of the sheet with respect to the maximum thickness T6 of the second intermediate portion The maximum thickness T6 is from the second tip of the second intermediate portion in a plane including the radial direction of the core. The ratio of the cross-sectional area S3 of the second intermediate portion to the position where the second intermediate portion is inserted is 2.5 or more. The roll body is mounted.

[0030]

[23] The sheet has both ends extending along the longitudinal direction of the sheet, and the core The roll body according to the above

[15] or

[17] , each of which has a convex portion protruding in a radial direction. .

[0031]

[24] Any of the above

[13] to

[23] , wherein the sheet has a resin film. The roll body according to claim 1.

[0032]

[25] The sheet is made of an acrylic resin, a polyester resin, or a cycloolefin. The roll body according to any one of the above

[13] to

[23] , comprising a polymer-based resin.

[0033]

[26] The roll body described in

[24] or

[0025] above, wherein the thickness of the sheet is 15 μm or more and 300 μm or less.

[0034]

[27] The rod according to

[13] above, wherein the first filling portion contains a coloring material or a luminescent material. Ru type.

[0035]

[28] The second filling portion and the third filling portion each contain a coloring material or a light-emitting material. The roll body according to the above

[14] or

[16] .

[0036]

[29] The rod according to

[15] above, wherein the first intermediate portion contains a coloring material or a light-emitting material. Ru type.

[0037]

[30] The second intermediate portion and the third intermediate portion each contain a coloring material or a light-emitting material. The roll body according to

[17] above.

[0038]

[31] The composition according to

[13] above, wherein the first filling section contains a cured product of a curable polymer composition. Roll body.

[0039]

[32] The second filling portion and the third filling portion are each a cured product of a curable polymer composition. The roll body according to the above

[14] or

[17] ,

[0040]

[33] The composition according to

[15] above, wherein the first intermediate portion contains a cured product of a curable polymer composition. Roll body.

[0041]

[34] The second intermediate portion and the third intermediate portion are each a cured product of a curable polymer composition. The roll body according to

[17] above,

[0042]

[35] A laminate comprising a substrate and one or more functional layers laminated on the substrate. The method for producing a compound according to any one of the above

[13] to

[34] ,

[0043]

[36] The manufacturing method described in any one of

[0013] to

[35] above, wherein the sheet is used for an optical film, a polarizing plate, or a display device. Effect of the Invention

[0044] According to one aspect of the present invention, the step caused by the winding start end of the sheet can be effectively reduced. A method for producing a roll body and such a roll body can be provided. According to the present invention, there is provided a method for manufacturing a roll body that can effectively reduce steps caused by a fixing member, and Thus, a roll body having a good rolling property can be provided. [Brief description of the drawings]

[0045] [Figure 1] FIG. 1 is a perspective view of a roll body according to a first embodiment. [Diagram 2] FIG. 2 is a plan view of a sample for identifying a position for measuring an in-plane retardation. [Diagram 3] FIG. 3 is an enlarged view of a portion of the roll body in FIG. [Figure 4] FIG. 4 is a diagram for explaining the dimensions of each component of the roll body in FIG. [Diagram 5] FIG. 5 is an enlarged view of the vicinity of the tip of the first filling section of the roll body of FIG. [Figure 6] FIG. 6 is a diagram showing regions R1 and R2 in the roll body of FIG. [Figure 7] FIG. 7 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 8] FIG. 8 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 9] FIG. 9 is a plan view of a roll body for identifying a measurement position by a laser displacement meter. [Figure 10] FIG. 10 is an image graph of the amount of displacement versus position created based on the measurement of a laser displacement meter. [Figure 11] FIG. 11 is an enlarged view of a part of the image graph of FIG. 10 for determining the areas S1 and S2. [Figure 12] FIG. 12 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 13] FIG. 13 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 14]FIG. 14 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 15] FIG. 15 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 16] FIG. 16 is an enlarged view of a part of another roll body according to the first embodiment. [Figure 17] 17(A) and 17(B) are diagrams that diagrammatically show the manufacturing process of the roll body according to the first embodiment. [Figure 18] 18(A) and 18(B) are diagrams that diagrammatically show the manufacturing process of the roll body according to the first embodiment. [Figure 19] 19(A) to 19(C) are diagrams illustrating a manufacturing process of another roll body according to the first embodiment. [Figure 20] 20(A) and 20(B) are diagrams illustrating another manufacturing process for the roll body according to the first embodiment. [Figure 21] 21(A) and 21(B) are diagrams illustrating another manufacturing process for the roll body according to the first embodiment. [Figure 22] 22(A) to 22(D) are diagrams illustrating schematic diagrams of other manufacturing processes for the roll body according to the first embodiment. [Diagram 23] 23(A) to 23(C) are diagrams illustrating schematic diagrams of other manufacturing processes for the roll body according to the first embodiment. [Figure 24] 24(A) and 24(B) are diagrams illustrating another manufacturing process for the roll body according to the first embodiment. [Diagram 25] FIG. 25 is a perspective view of a roll body according to the second embodiment. [Figure 26] FIG. 26 is an enlarged view of a portion of the roll body in FIG. [Figure 27] FIG. 27 is a diagram for explaining the dimensions of each component of the roll body in FIG. [Figure 28] FIG. 28 is a diagram showing the measurement of the maximum thickness and length of the second intermediate portion shown in FIG. [Figure 29] FIG. 29 is a diagram showing the cross-sectional area S3. [Diagram 30] FIG. 30 is an enlarged view of a part of another roll body according to the second embodiment. [Diagram 31] FIG. 31 is an enlarged view of a part of another roll body according to the second embodiment. [Diagram 32] FIG. 32 is an enlarged view of a portion of another roll body according to the second embodiment. [Diagram 33] FIG. 33 is an enlarged view of a part of another roll body according to the second embodiment. [Diagram 34] FIG. 34 is an enlarged view of a part of another roll body according to the second embodiment. [Diagram 35] FIG. 35 is an enlarged view of a portion of another roll body according to the second embodiment. [Diagram 36] FIG. 36 is an enlarged view of a portion of another roll body according to the second embodiment. [Figure 37] FIG. 37 is an enlarged view of a part of another roll body according to the second embodiment. [Figure 38] 38(A) to 38(C) are diagrams illustrating a manufacturing process of the roll body according to the second embodiment. [Figure 39] 39(A) and 39(B) are diagrams illustrating a manufacturing process of the roll body according to the second embodiment. [Diagram 40] Figure 40(A) is a graph showing the amount of displacement versus position around the first filling section of a roll body of Example 7, Figure 40(B) is a graph showing the amount of displacement versus position around the first filling section of a roll body of Example 8, and Figure 40(C) is a graph showing the amount of displacement versus position around the first filling section of a roll body of Example 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0046] [First embodiment] Hereinafter, a roll body according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a roll body according to the present embodiment, and FIG. 2 is a view showing a position at which an in-plane retardation is measured. FIG. 3 is a plan view of a sample for identifying the roll body of FIG. 1 . FIG. 4 is a diagram for explaining the dimensions of each component of the roll body in FIG. 1, and FIG. FIG. 6 is an enlarged view of the vicinity of the tip of the first filling portion of the roll body of FIG. FIG. 9 is a diagram showing an area R1 and an area R2 in a body, and FIG. FIG. 10 is a plan view of a roll body for identifying the The image graph of the displacement for the created position is shown in Figure 11. 7, 8, 12, and 13 are enlarged views of the image graph of FIG. 10. Fig. 16 is an enlarged view of a part of another roll body according to the present embodiment. 20 to 24 are diagrams illustrating a manufacturing process of the roll body according to the present embodiment. 10A to 10C are diagrams illustrating another manufacturing process for the roll body according to the present embodiment.

[0047] <<<Roll body>>> The roll body 10 shown in FIG. 1 includes a core 11 and a long wire wound around an outer peripheral surface 11A of the core 11. The roll body 10 includes a winding core 11 and a rectangular sheet 12. As shown in FIG. A first filling portion 14 is filled in a first gap 13 located between the sheets 12, and the core 11 and the sheet A second filling portion 16 is filled in a second gap 15 located between the sheets 12, and a part of the sheet 12 is filled in the second gap 15. The roll body 10 further includes a fixing member 17 for fixing the roll body 10 to the core 11. It is connected to the first filling section 14 and is interposed between the first round sheet 12 and the second round sheet 12. The roll body 10 shown in FIG. 3 further includes a fourth intermediate portion 18. However, as in the case of the roll body 10 shown in FIG. 7, the roll body 10 does not necessarily have to have the fourth intermediate portion. The sheet 12 is wound around the core 11 multiple times, for example, two or more times.

[0048] <<Core>> The shape of the core 11 is not particularly limited, but from the viewpoint of easily winding the sheet 12, it is preferable to use a circular core. It is preferable that the core 11 has a columnar or cylindrical shape. The core 11 shown in FIG. 1 has a cylindrical shape. When the winding core is cylindrical, the channel of the winding device is inserted into the hole 11B of the winding core 11 in the width direction DR1. By inserting the locking member, the roll body 10 can be held. The winding core is provided with a shaft member that penetrates the winding core, and by attaching the shaft member to the winding device, The roll body can be held on the winding device.

[0049] The width W1 of the core 11 (see FIG. 1) is not particularly limited, but is, for example, 0.1 m or more and 50 m or less. The lower limit of the width W1 of the core 11 may be 0.2 m or more, 0.3 m or more, or 0.7 m or more, 1.0 m or more, 1.5 m or more, or 2 m or more, with the upper limit being 30 m Below, 20m or less, 10m or less, 7m or less, 5m or less, 3.5m or less, 3m or less, or The width of the core may be 2.5 m or less. The width of the core is measured at 10 points and the width of the 10 points is The arithmetic mean value of the width of the eight points excluding the maximum and minimum values ​​is calculated. It is possible.

[0050] The outer diameter of the core 11 is not particularly limited, but is, for example, 30 mm or more and 8000 mm or less. The lower limit of the outer diameter of the winding core 11 may be 90 mm or more or 100 mm or more. The upper limit is 5000mm or less, 3500mm or less, 2000mm or less, 1000mm or less. m or less, 700 mm or less, 500 mm or less, 350 mm or less, or 300 mm or less The outer diameter of the winding core may be determined by measuring the outer diameter of the winding core at 10 points and calculating the outer diameter of the 10 points. The arithmetic mean value of the outer diameter at eight points excluding the maximum and minimum values ​​can be calculated. can.

[0051] When the winding core 11 is cylindrical, the inner diameter of the winding core 11 is not particularly limited, but is preferably 20 mm. The lower limit of the inner diameter of the core 11 may be 50 mm or more and 80 mm or less. m or more, 120 mm or more, 150 mm or more, and the upper limit is 4500 mm or more. Bottom, 3000mm or less, 1500mm or less, 900mm or less, 600mm or less, 400m The inner diameter of the core may be 1.5 mm or less, 250 mm or less, or 200 mm or less. The inner diameter was measured at 10 points, and the maximum and minimum values ​​were excluded from the 8 points. It can be determined by determining the arithmetic mean value of the inside diameter.

[0052] In order to reduce the step caused by the beginning of the sheet winding, the position of the beginning of the sheet winding A step is formed at the part where the sheet contacts the outer periphery of the core so that the thickness of the sheet is lowered by the thickness of the sheet. However, the portion of the outer circumferential surface 11A of the core 11 that contacts the sheet 12 has this Such a step is not formed. This allows the sheet 12 to be used in various thicknesses. "There is no step at the part where the sheet contacts the outer peripheral surface of the core" means that the At the center and at each periphery at a distance of 100 mm or more from the center in the width direction of the core, This means that there is no part where the difference in height is 3 μm or more. The outer peripheral surface 11A of the sheet 12 is in contact with the step having a height difference of less than 3 μm. The difference may be formed.

[0053] The material constituting the winding core 11 is not particularly limited. Examples of the material constituting the winding core 11 include Examples of the material include paper, plastic, and metal. Paper also includes paper impregnated with resin. As for plastics, fiber reinforced plastics (FRP) are forced plastics), polyethylene (PE), polypropylene (PP), etc. Polyolefin, polyvinyl chloride (PVC), polystyrene (PS), acrylonitrile Examples include styrene-butadiene copolymer (ABS), phenolic resin, and nylon. Among these, for example, in the case of optical coating processing, weight, workability and From the viewpoint of strength, fiber reinforced plastics (FRP) are preferred. For example, the main component is made of epoxy resin or phenolic resin, and the other components are glass, epoxy, and poly. Examples include hybrids of ester, carbon, and aramid fibers. Examples of suitable materials include iron, stainless steel (SUS), and aluminum.

[0054] <<Sheet>> The sheet 12 is long. Specifically, the sheet 12 has a sufficient thickness relative to its width. It is thin enough and long enough.

[0055] The width W2 of the sheet 12 (see FIG. 1) is not particularly limited, but is, for example, 0.1 m or more and 50 In this specification, the "width of the sheet" refers to the width of the sheet in the short direction (the width of the core). The lower limit of the width W2 of the sheet 12 is 0.2 m or more and 0.3 m or less. The upper limit may be 0.5 m or more, 1.0 m or more, or 2.0 m or more, and the upper limit is 30 m. 20m or less, 10m or less, 7m or less, 5m or less, 3.5m or less, or 3m or less The sheet width is measured at 10 points and the width of the sheet is The arithmetic mean value of the width of eight points excluding the maximum and minimum values ​​can be calculated. Cut.

[0056] It is preferable that the width W2 of the sheet 12 is smaller than the width W1 of the core 11. This allows the sheet 12 to be securely held by the core 11 .

[0057] The length of the sheet 12 may be, for example, 20 m or more and 10,000 m or less. The term "length of the sheet" in the above means the length of the sheet in the longitudinal direction. The lower limit may be 30 m or more, 40 m or more, or 50 m or more, and the upper limit may be 900 It may be 0m or less or 8000m or less.

[0058] The thickness of the sheet 12 is not particularly limited, but is, for example, 3 μm or more and 600 μm or less. The lower limit of the thickness of the sheet 12 is 10 μm or more, 15 μm or more, 20 μm or more, or The upper limit is 500 μm or less, 400 μm or less, 300 μm or less. The thickness may be 100 μm or less, 200 μm or less, 110 μm or less, or 80 μm or less. However, this does not apply when a thin film is preferred, and the thickness is 3 μm or more but less than 50 μm, or even 40 The thickness of the sheet is preferably 10 μm or less. By calculating the arithmetic mean value of the thickness at eight points excluding the maximum and minimum values, The above step is unlikely to occur when the sheet is thick, but when the sheet is thin, The present invention is applicable to a sheet having a small thickness (80 μm or less, less than 50 μm, and further This is particularly effective when the thickness is less than 40 μm.

[0059] The sheet 12 is made of, for example, an acrylic resin, a polyester resin (particularly, polyethylene terephthalate). When the sheet 12 contains a cycloolefin polymer, the sheet 12 The thickness is preferably 15 μm or more and 300 μm or less. When any one of the above is included, the step becomes more prominent as the thickness of the sheet becomes thinner. If the thickness is made extremely thin, the above-mentioned step tends to become smaller. For example, If there is a heating process of 300°C or more, the deformation caused by the above step cannot be eliminated if the sheet is thin. However, if the sheet thickness is to a certain extent (for example, 15 μm or more), If the sheet 12 is heated, the deformation may not be eliminated. This is particularly effective when the sheet 12 has a thickness of 15 μm or more. In the case where either of them is included, if the thickness of the sheet is too thick, a large amount of coating material is required. From the viewpoint of reducing costs, the thickness of the sheet 12 is preferably 300 μm or less. In addition, if any of these resins is included, the step is unlikely to occur if the thickness exceeds 300 μm. If the sheet 12 contains any of these resins, the thickness of the sheet 12 may be The limit is more preferably 20 μm or more, 35 μm or more, or 50 μm or more. The upper limit of the thickness of the sheet 12 is 250 μm or less, 200 μm or less, 150 μm or less, or 1 It is more preferable that the thickness of the film is 0.00 μm or less. It is particularly effective when the thickness is not too thick.

[0060] In addition, when the fixing member 17 is provided, the sheet 12 is placed on the fixing member 17. Therefore, the total thickness of the sheet 12 and the fixing member 17 is the step caused by the roll start end of the sheet. Therefore, for example, when the thickness of the fixing member 17 is 3 μm or more and 10 μm or less, In this case, the thickness of the sheet 12 is preferably thin, and the upper limit is set to 130 μm. In addition, when the fixing member is an adhesive tape, the thickness is preferably 90 μm or less. In this case, if the thickness of the fixing member exceeds 15% of the thickness of the sheet, the effect on the above step will be even greater. Therefore, it is better that the thickness of the sheet 12 is not too thin. is preferably, for example, 20 μm or more or 35 μm or more.

[0061] Examples of the sheet include a film, a metal foil, and a paper. Examples of the film include Applications requiring light transmittance (for example, optical film applications) When a resin film is used for the light-transmitting layer 2, the resin film preferably has optical transparency. The resin constituting such a resin film is not particularly limited as long as it has optical transparency. For example, acrylic resins, polyolefin resins (polyethylene resins, polypropylene resins, etc.) Polyolefin resin, cycloolefin polymer resin, polycarbonate resin, polyacrylic resin Polyester resins (polyethylene terephthalate, polyethylene naphtha acrylate, etc.), aromatic polyether ketone resin, polyether sulfone resin, acetylene cellulose-based resins (e.g., triacetyl cellulose-based resins), polyimide-based resins, poly Amido-imide resin, polyamide resin, or a mixture of two or more of these resins Among these, resin films having relatively high flexibility, such as acrylic resins, polyolefin resins, polyester resins, acetyl cellulose resins, poly Resin films containing imide resin, polyamide-imide resin, or polyamide resin are The sheet is easily deformed due to the step caused by the beginning of the sheet winding or the step caused by the fixing member. Therefore, the technology of the present invention is effective. In addition, low moisture permeable resins are preferred for use. In many cases, the entire width of the sheet is used in the final product, so if there is any deformation due to unevenness even in a part of the sheet, For example, acrylic resin, polyester resin, cyclo Olefin polymer resins are preferably used for large displays, but the technology of the present invention According to this, deformation due to the step can be effectively prevented and mass productivity can be improved. The technology of the present invention is particularly effective for sheets made of these resins. When thinness is required, for example, when using a film with a thickness of less than 50 μm, The technology of the present invention is suitable for films of any material.

[0062] In the case where the sheet 12 is used as an optical film, it is particularly preferable that the sheet 12 is made of an acrylic resin or a cyclohexylamine resin. When the sheet 12 contains a olefin polymer-based resin, the in-plane phase difference (retardation: R e) is preferably 10 nm or less. The lower the optical distortion, the smaller the residual distortion of the sheet 12. In other words, the in-plane retardation Re of the sheet 12 is 10 nm or less. This means that the polymer in the sheet 12 is uniform, so when the sheet 12 is rolled into a long length, However, due to some step, it is difficult for a new step to be generated due to the polymer state inside the sheet 12. The upper limit of the in-plane retardation Re of the sheet 12 is preferably set to 100 nm in terms of display application. This means that color unevenness and blackouts, which are issues when used in combination with a polarizer, are unlikely to occur. From this viewpoint, it is more preferable that the thickness is 8 nm or less, or 4 nm or less. In the case of acrylic resins, if they are used for optical purposes, they will turn white when bent like conventional acrylic resin films. The phenomenon of the haze value (total haze value) being 1% or less or 0.5% or less does not occur. Lower and smaller are preferred.

[0063] In addition, when the sheet 12 is used as an optical film and contains a polyester resin, As mentioned above, if the polymer in the sheet 12 is uniform, the internal polymer state is the cause. When the sheet 12 contains a polyester resin, the material Since stretching is essential to obtain physical strength, the polymer state is made as uniform as possible. The film is preferably produced by sequential or simultaneous biaxial stretching at approximately the same magnification in both the length and width directions. A sheet containing a polyester resin having a smaller in-plane retardation than conventional sheets can be obtained. The difference is small when the sheet thickness is 10μm to 90μm and the in-plane retardation is 1500nm or less. It means that the wavelength is preferably 1200 nm or less, more preferably 1000 nm or less, More preferably, it is 800 nm or less. In order to improve the physical properties of the film, such as its elastic modulus and tear strength, the in-plane retardation is It is better not to be too small, and it is preferable that it is 200 nm or more, and more preferably 400 nm or more.

[0064] In order to further improve the physical properties, the birefringence in the film thickness direction as well as the birefringence in the in-plane direction should be improved. It is better to consider the balance with refraction. The Nz coefficient is an index for this. Since it is influenced by the crystallinity and orientation within the film, it is related to the properties of the entire sheet. For example, in the case of polyethylene terephthalate, the Nz coefficient is usually 2 to 4. When the sheet is rolled into a long length, some unevenness may occur, causing new polymer particles to form in the sheet. In terms of preventing the occurrence of steps, it is preferably 5 or more, more preferably 8 or more, and most preferably 10 or more. The upper limit of the Nz coefficient is about 80, preferably 70 or less, and at most It is also preferably 50 or less.

[0065] The in-plane retardation (Re) is the retardation in the slow axis direction, which is the direction in the plane of the sheet that has the largest refractive index. a refractive index nx in the direction perpendicular to the slow axis direction in the plane; The refractive index ny and the thickness t (nm) of the sheet are expressed by the following formula (1): According to the following formula (1), a small in-plane retardation is due to a low degree of orientation. It can be seen that there is a tendency that the bending resistance can be improved. Tsuka Electronics Co., Ltd.'s product name "RETS-100" and Oji Instruments' product name "KOBR It can be measured using "A-WR" and "PAM-UHR100". In-plane phase difference (Re)=(nx-ny)×t…(1)

[0066] The Nz coefficient is calculated by the refractive index nz in the thickness direction of the sheet, the above nx, and the above ny, as follows: It is expressed by equation (2). Nz coefficient=(nx-nz) / (nx-ny) …(2)

[0067] When measuring the above Re using the RETS-100, follow the procedure below. First, turn on the RETS-100 light source to stabilize it. Leave it for 60 minutes or more. After that, select the rotating analyzer method and the θ mode (angle direction position). By selecting this θ mode, the stage will rotate and tilt. This will be the stage.

[0068] Next, the following measurement conditions are entered into the RETS-100. (Measurement conditions) Retardation measurement range: Rotating analyzer method Measurement spot diameter: φ5mm Tilt angle range: -40°~40° Measurement wavelength range: 400nm~800nm The average refractive index of the sample (e.g., for PET, N = 1.617, and for acrylic, N = 1.617). In the case of polyester resin film, the ratio shall be 1.5. Thickness: Thickness measured separately using SEM or optical microscope

[0069] Background data is then obtained without placing a sample in the instrument. This is a chain system, and is performed every time the light source is turned on.

[0070] Then, the sample is placed on the stage inside the device. The sample may be of any shape, for example rectangular. The sample size is 50 mm. If there are multiple samples, they should all be placed in the same orientation. For example, all samples must be marked in advance to ensure that they are all set in the same orientation. It is preferable to have it attached.

[0071] After placing the sample, the sample was placed in an environment of 23±5°C temperature and 50±20% relative humidity. Rotate the stage 360° on the plane to measure the fast and slow axes. Select the slow axis. Then, measure while tilting the stage within the set angle range around the slow axis. The tilt angle and wavelength range (Re) are set in 10° increments. The in-plane retardation Re is the value measured with an incident angle of 0° and light with a wavelength of 589 nm. The in-plane retardation Re is measured at five different positions. Two imaginary lines IL1 and IL2 are drawn passing through the center A1 of the sample SA so that the two lines intersect at right angles. Drawing these imaginary lines IL1 and IL2 divides the sample into four sections. Set a total of four points A2 to A4, one at an equal distance from the center A1, and Measure at five points, A2 to A4. Then, exclude the maximum and minimum values ​​from the five measured values. The arithmetic average value of the three points is defined as the in-plane retardation Re.

[0072] The sheet 12 may have a single layer structure, but may also have a laminated structure of two or more layers. Specifically, the sheet 12 may be a substrate alone or a functional layer alone, but for example, Alternatively, it may be a laminate (for example, an optical laminate) in which one or more functional layers are formed on a substrate. In this specification, the term "functional layer" refers to a layer intended to exert some function in the laminate. Specifically, the functional layer may be, for example, a base layer, a hard coat layer, an impact Absorption layer, anti-glare layer, antistatic layer, conductive layer, heat dissipation layer, UV absorption layer, special wavelength absorption layer, special wave Long transmission layer, color reproducibility improvement layer, liquid crystal layer, retardation adjustment layer, viewing angle adjustment layer, reflection layer, colored layer, anti-reflection layer, Antireflection layer (high refractive index layer, low refractive index layer), antifouling layer, water repellent layer, oil repellent layer, etc., or a combination of these layers The "functional layer" in this specification may have a single layer structure, However, in this specification, the term "functional layer" refers to the use of the sheet 12. It does not include release liners, which are layers that are sometimes present but are removed during use. If a release liner is present in the sheet, defects are more likely to occur and there is a problem different from the above-mentioned step. If a release liner is provided on the sheet 12, The film is wound around the core 11 with the release liner removed.

[0073] The use of the sheet 12 is not particularly limited, but may be, for example, optical use (for optical films) Applications include polarizing plates, display devices, fixtures, automotive interior decoration, battery materials, food Among these, optical films have a tendency to have a rise at the beginning of the roll. If there is a step caused by the mounting material or the fixing material, it will affect not only the appearance but also the light transmittance. Therefore, the technique of the present invention is particularly useful for optical applications.

[0074] The sheet 12 has a start end 12A (see FIG. 3) and a finish end 12B (see FIG. 1). In the roll body 10, the winding start end 12A is provided with a winding end 12B. In the roll body 10, as shown in FIG. The tip end surface 12A1 located in the longitudinal direction DR2 of the winding start end 12A is the sheet 1 In a cross section taken along the longitudinal direction DR2 of the winding core 11 and the radial direction DR3 of the winding core 11, the fixing member 17 The term "almost aligned" in this specification means that , the distance between the tip surface 12A1 and the second end surface 17B in the longitudinal direction DR2 of the winding start end 12A This means that the width W3 of the fixing member 17 (see FIG. 4) is within ±20%. The "+" signifies that the tip end surface 12A1 protrudes beyond the second end surface 17B, and the "-" signifies that the tip end surface 12A1 protrudes beyond the second end surface 17B. " has a tip surface 12A1 recessed from the second end surface 17B (i.e., the second end surface 17B protrudes beyond the tip surface 12A1.

[0075] <<Fixing parts>> The fixing member 17 is for fixing a part of the sheet 12 to the outer peripheral surface 11A of the core 11. The fixing member 17 extends in the width direction DR1 of the core 11. A part of the core 11 is fixed to the outer peripheral surface 11A of the core 11 along the width direction DR1 of the core 11. can be done.

[0076] The fixing member 17 has a first end surface 17A and a second end surface 17B on the opposite side. Both end surface 7A and second end surface 17B extend in width direction DR1 of core 11.

[0077] In FIG. 3, the fixing member 17 is disposed between the outer peripheral surface 11A of the core 11 and the winding start portion of the sheet 12. The sheet 12 is in close contact with the outer peripheral surface 11A of the core 11. In the first turn of the sheet 12, the winding start end 12A is fixed. In FIG. 3, the entire surface of the fixing member 17 is not rolled. As shown in FIG. 8, the winding start end 12A is fixed. For example, the end 1 If 2A is fixed to the fixing member 17 to such an extent that it does not come off, it is possible to fix it to the winding start end 12A. The first filling portion 14 may be inserted between the members 17 .

[0078] The fixing member 17 is not particularly limited, but may be an adhesive member or a pressure sensitive adhesive member such as double-sided tape. The fixing member 17 may have elasticity (cushioning properties). It has adhesive properties on both sides.

[0079] The width W3 of the fixing member 17 (see FIG. 4) is preferably 5 mm or more and 100 mm or less. If the width W3 of the fixing member 17 is 5 mm or more, the fixing member 17 can be reliably sealed to the outer peripheral surface 11A of the core 11. If the thickness of the sheet 12 is less than 100 mm, the sheet 12 will not wrinkle. The sheet 12 can be rolled without causing any deformation. The lower limit of the width W3 of the fixing member 17 is the distance from the first end surface to the second end surface. is preferably 10 mm or more, 20 mm or more, or 30 mm or more, and the upper limit is It is preferable that it is 50 mm or less or 40 mm or less.

[0080] The thickness of the fixing member 17 is preferably 3 μm or more and 600 μm or less. If the thickness of 7 is 3 μm or more, a part of the outer circumferential surface 11A of the winding core 11 can be reliably fixed. If the thickness is 600 μm or less, deformation of the sheet 12 can be further suppressed. The lower limit of the thickness is preferably 5 μm or more, 10 μm or more, or 20 μm or more. The upper limit is preferably 200 μm or less, 100 μm or less, or 50 μm or less. The thickness of the fixing member was measured at 10 points and the arithmetic mean of the thicknesses at those 10 points was calculated. It can be found by determining the value.

[0081] <First Gap> The first gap 13 is located in the longitudinal direction DR2 (see FIG. 3) at the winding start end 12A. Specifically, the first gap 13 shown in FIG. The outer peripheral surface 11A of the sheet 11, the back surface 12C of the first turn of the sheet 12, and the tip of the winding start end 12A. This gap is surrounded by the surface 12A1 and the second end surface 17B of the fixing member 17. When 17 is not provided, the first gap is between the outer peripheral surface of the core and the back surface of the first round sheet. and the tip surface of the winding start end.

[0082] The first gap 13 is a gap that contacts the tip end surface 12A1 and is a gap between the winding core 11 and the first turn of the winding core 11. Since the gap is located between the first end surface 17A and the second end surface 17B, it is a third gap, which will be described later. It is also in between.

[0083] <Second gap> The second gap 15 is a gap that contacts the first end surface 17A of the fixing member 17. The second gap 15 shown in FIG. 3 is formed between the outer peripheral surface 11A of the core 11 and the back surface 11 of the first round of the sheet 12. 2C and first end surface 17A of fixing member 17.

[0084] <First filling section> The first filling portion 14 is filled in the first gap 13. That is, the first filling portion 14 is wound The outer peripheral surface 11A of the core 11, the back surface 12C of the first turn of the sheet 12, and the end of the winding start end 12A The end surface 12A1 is in contact with a second end surface 17B of the fixing member 17. In the case where the first filling portion is not provided, the first filling portion is formed on the outer peripheral surface of the core, the back surface of the first round sheet, and In this specification, the term "filling" refers to the part that constitutes the filling portion. This means that the gap is mostly filled with the material. However, there may be voids (e.g. For example, air bubbles may be present.

[0085] The sheet 12 has an effective area to be used as a product and an effective area in the short direction of the sheet 12. The first filling section has a non-useful area that is not used as a product and is located on both sides of the first filling section. 14 exists at least in the effective area. The effective area is the area where the product is used. Therefore, the first filling portion 14 is present over the entire width of the effective area in the width direction DR1 of the core 11. If the first filling portion 14 exists in the effective area, it is preferable that the first filling portion 14 exists in the non-effective area. However, if the first filling portion 14 is present in the non-effective region, the first filling portion 14 may be There is a risk that the material may extend beyond the limits of Sheet 12, and the non-effective area may not be used as a product in the first place. Since the first filling portion 14 is an area that is not used and there is no need to reduce the step, the first filling portion 14 is ineffective. The non-effective area may vary depending on the use of the sheet and the sheet width. However, normally, the distance is within 10mm to 30mm from both ends of the sheet in the short direction. When the first filling portion 14 is present in the non-effective region, the first filling portion 14 is a seal. However, from the viewpoint of suppressing protrusion, From each of these ends toward the center of the sheet, the distance is at least 1 mm, preferably at least 5 mm, more preferably It is preferable that they are located at a distance of 10 mm or more.

[0086] At the separation position P1 side where the first round of the sheet 12 separates from the core 11 in the first filling section 14 The edge thickness T1 of the tip portion 14A (see Figs. 4 and 5) is large. Since there is a risk of a new step being formed due to the contact, it is preferable that the thickness is thin. Depending on the purpose, it may be better to have some edge thickness T1 than not having it at all. The edge thickness T1 is preferably, for example, 50 μm or less. In this case, the deformation caused by the step between the winding start end 12A and the winding start end 12A is no longer visible. In order to shorten the deformation relaxation length, which is the distance to the point where the deformation occurs, the At the beginning of winding, the thickness is preferably 10 μm or less, more preferably 5 μm or less, and even more preferably 2 μm or less. Therefore, the more the step caused by the edge is reduced, the more the deformation of the sheet caused by this step is reduced. Therefore, the deformation relaxation length is shortened. In addition to being used to indicate the length until the sheet deformation caused by the step due to the fixing This refers to the length until the sheet deformation caused by the step due to the component becomes unnoticeable. The deformation relaxation length is set so that the deformation of the sheet due to the step caused by the fixing member is not visible. When used to mean the length from the winding start end 12A to the fixed end, the deformation relaxation length is This is the distance to the point where the deformation caused by the step of the support member 17 is no longer visible. The length is preferably shorter, specifically, 100m or less, 75m or less, 60m or less, 50 m or less, or preferably 35 m or less, 20 m or less, or 15 m or less. If the relaxation length is 75m or less, the sheet deformation will not be visible in more areas, so it is considered to be good. As described above, the deformation relaxation length is the length until the sheet deformation due to the step is no longer visible. The length of the gap is determined as follows. In an indoor environment of 800 Lux to 2000 Lux, a long sheet is illuminated with white light. The white light source tube (white LED lamp, white fluorescent lamp, etc.) is reflected on the sheet. If there is a part where the contour line is distorted compared to the other parts of the sheet, it is judged that there is a step. The outline of the white light source tube reflected around the area where the step was located was visible on the sheet. The part that can be judged to be the same as the part is judged to have no step. The length of the tube is aligned with the length of the sheet. The length of the color light tubes can also be changed. Specifically, the length of the white light tube is adjusted according to the step in the sheet. It is preferable that the length of the gap is set to a length including both the portion where the difference exists and the portion where the step does not exist. This makes it easier to see where the steps are. If there is a white light source, the white light source tube itself may or may not be lit. It is important that the color light source tubes are reflected on the sheet so that the outline of the light can be seen. Therefore, the observation conditions should be appropriately selected so that the outline of the white light source tube is clearly visible. For example, the outline of the white light tube is easier to see on the back side of the sheet than on the front side. If this is the case, try projecting a white light source onto the back of the sheet to see if there is a step. Specifically, for example, an anti-glare layer or other function on the surface of the substrate can be used to prevent the white light source tube from being reflected. In the case of a laminate in which layers are laminated, check whether there is a step when observing from the antiglare layer side. Therefore, in this case, the antiglare layer is not laminated on the back side of the base material. It is a good idea to use a white light source to check whether there is a step. Various laminates are available, such as a laminate in which one or more functional layers are laminated on top of the It can also be used in rolls for various applications. For example, an antiglare layer is laminated on a substrate as a functional layer. When the film is layered, the uneven surface that provides the anti-glare function is crushed by pressure and the shadow is eliminated. In addition, various functional layers are laminated and the roll body is If the white light source tube is not easily reflected on the visible side or the opposite side, change the shape as described above. This can be distinguished by the fact that shadows and other factors can reveal a different coloring from other parts.

[0087] In addition, in the case where the sheet 12 is a thin film having a thickness of 3 μm or more and less than 50 μm, In this case, the wire is more susceptible to the effect of the step caused by the winding start end 12A than when the wire is thick. When such a thin film is used, the edge thickness T1 is preferably 10 μm or less. In order to minimize the deformation relaxation length, it is preferable that the deformation relaxation length is 7 μm or less, 5 μm or less, or even 1 μm or less. m or less is more preferable.

[0088] From the viewpoint of minimizing the deformation relaxation length, the edge thickness T1 is preferably the above-mentioned thickness. However, the surface of the core is finished and may have unevenness. At the tip of the filling part, the material that constitutes the first filling part is embedded along the unevenness. There may be some areas where the edge thickness T1 exists and some areas where it does not, which may result in unevenness. However, if the edge thickness T1 is thin, even if such unevenness occurs, Therefore, if there are irregularities and unevenness occurs, the edge thickness T It is preferable that the edge thickness T1 is thin. Specifically, for example, the edge thickness T1 is 15 μm or less, and 10 μm or less. It is preferably 5 μm or less, and more preferably 1 μm or less.

[0089] On the other hand, there is also an effect due to the existence of the edge thickness T1. For example, the core is a roll For this reason, the core is often reused after the first filling part is The filling part is peeled off from the core or removed by washing or wiping. Reworkability is required to reuse the core. For this reason, for example, the first filling section 14 is It is preferable that the first filling portion 14 is not bonded to the winding core 11 so as to be In the portions in contact with the core 11 and the sheet 12, the sheet 12 is a first filling It is preferable that the sheet 12 can be peeled cleanly from the first filling portion 14. If the first filling portion 14 is broken during the winding, the first filling portion 14 must be completely removed from the core 11. In contrast, if the edge thickness T1 exists, the From the viewpoint of reworkability, it is recommended to make the edge thickness T1 as thick as possible. For example, from the viewpoint of reworkability, the edge thickness T1 is 5 The edge thickness T1 is preferably set to 1 μm or more depending on the material of the core and the sheet. The desired thickness may vary, and the edge thickness T1 may be 1.5 μm or more, or even 5 μm or more. The upper limit of the edge thickness is 30μ because there is a risk of a new step being formed due to the thickness. m or less is preferable.

[0090] The edge thickness T1 can be measured using a scanning optical interference surface measuring instrument. As such a surface shape measuring instrument, for example, the "New View" manufactured by Zygo Corporation is available. Examples include the "w" series.

[0091] Specifically, the scanning optical interference surface shape measuring instrument (product name "New View7300", Using a Zygo meter, the edge thickness T1 can be calculated as follows: When the entire sheet is unwound, the first filling portion 14 adheres to the sheet 12 and is peeled off from the core. If the first filling portion 14 is attached to the side of the sheet 12 that is fed out, the sheet From the first filling portion 14, one or more samples having a size of 0.5 mm square or more including the tip portion 14A of the first filling portion 14 are The sample is not limited to a square, but may be any rectangular shape as long as it is 0.5 mm square or larger. (e.g., 2 mm x 5 mm). The sample may include the first filled portion 14 and The sample is cut from an arbitrary location that is free of dirt, fingerprints, etc. Then, the following measurements are performed: The edge thickness T1 of the first filling portion 14 is measured under the condition. 10 points were measured, and the thickness of the 8 points excluding the maximum and minimum values ​​was It can be determined by calculating the arithmetic mean value. (Measurement conditions) Objective lens: 10x ·Zoom: 1x ·Measurement area: 2.17mm x 2.17mm Scan Length: 5μm min mod:0.015

[0092] The thickness T2 (see FIG. 4) of the first filling portion 14 at the position where it contacts the tip surface 12A1 is If the fixing member 17 is present, the thickness of the fixing member 17 is greater than the sum of the thicknesses of the fixing member 17 and the sheet 12. In the case where the fixing member 17 is not present, the thickness is preferably greater than the thickness of the sheet 12. By making the thickness of the winding start end 12A as described above, the step caused by the winding start end 12A can be more effectively prevented. However, if the thickness T2 is too thick, the winding start end 12A may be damaged. However, this can adversely affect the winding of the sheet 12. For this reason, for example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the thickness T 2 is preferably 52 μm or more and 220 μm or less, and more preferably 52 μm or more and 150 μm or less. When the thickness of the sheet 12 is 3 μm or more and less than 50 μm, the thickness T2 is 50.5 It is preferable that the thickness is 1 μm or more and 100 μm or less.

[0093] The thickness T2 of the first filling portion 14 at the position where it contacts the tip surface 12A1 is as follows: The thickness T2 can be measured when the fourth intermediate portion 18 is present and when the fourth intermediate portion 18 is not present. In the case where the fourth intermediate portion 18 does not exist, the measurement method may be different. The displacement can be measured using a laser displacement meter or a stereo microscope. In cases where the laser displacement meter and stereo microscope are used, the measurement can be performed using a stereo microscope. The thickness T2 is measured under conditions of 23±5°C and 50±20% relative humidity. Let us assume that.

[0094] The thickness T2 can be measured by the laser displacement meter as follows. The measurement method utilizes the reflection of laser light, so the sheet 12 is transparent and the first filling This is particularly effective when the part is not transparent (for example, colored). A jig for rotating the body 10 and a laser displacement meter (for example, product name "LK-G30" The jig is a core 11. The roll body 10 is inserted into a hole 11B in the width direction DR1 of the roll body 10 and rotatably holds the roll body 10. Although the LK-G30 is listed as a laser displacement meter, it is not the same as the LK-G30. At the very least, an equivalent laser displacement meter, such as a successor model, may be used.

[0095] The laser displacement meter includes a laser source and a light receiving element. The laser light reflected on the surface of the first filling portion 14 is received by a light receiving element, and the light receiving position of the light receiving element is It is a device that can measure displacement depending on the position.

[0096] The laser displacement meter is positioned above the roll body 10, and a laser beam is irradiated onto the surface of the roll body 10. The three laser displacement meters are placed so that they can be aimed at the target. First, as shown in FIG. 9, the width of the sheet 12 is divided into three equal parts at the first position B1 and the second position B2. The first position B1 is a position in the short direction of the sheet 12 (the width direction DR1 of the core 11). ) on the first end 12G1 side, and the second position B2 is located on the second end 12G2 on the opposite side to the first end 12G1. The first laser displacement meter is located at the first position B1 and the first end 12G1. The second laser displacement meter is placed so that the laser beam is irradiated on the midpoint C1 of the first position. The third laser is placed so that the laser beam is irradiated to the midpoint C2 between the first position B1 and the second position B2. The laser displacement meter is set so that the laser beam is irradiated onto the midpoint C3 between the second position B2 and the second end 12G2. will be placed in.

[0097] Then, the roll body 10 is attached to a jig, and the first filling portion 14 is exposed from the roll body 10. The sheet 12 is then fed out until the first filling portion 14 is exposed. Then, the core 11 is rotated. The laser displacement meter was used to measure the distance from the object, with a sampling period of 200 μs while rotating at a speed of 30 mm / s. The displacement is measured continuously and plotted on a graph with the horizontal axis representing the position (mm) and the vertical axis representing the displacement (mm). This measurement is performed from the tip 14A of the first filling portion 14 to the tip surface 12 The measurement is performed toward the position touching A1, and the reference height (displacement 0 mm line) is defined as the height of the winding core 11, and the difference between the reference height and the amount of displacement of the first stuffing portion 14 is defined as the thickness of the first stuffing portion 14. In addition, this graph has a horizontal axis with one division equal to 5 mm and a vertical axis with one division equal to 0.02 Let it be mm.

[0098] In this graph, in the area where the first filling portion 14 exists, the change from the tip portion 14A However, after the position where the first filling portion 14 comes into contact with the tip surface 12A1, the displacement amount Therefore, the position on the position displacement curve where the displacement starts to drop sharply is Then, find the difference between the displacement amount 0 mm line and the displacement amount at position E1. In this way, the thickness T2 of the first filling portion 14 at the position where it contacts the tip surface 12A1 is obtained.

[0099] The thickness T2 can be measured using a stereomicroscope as follows. The part including the starting end 12A, the first filling part 14, and the second round of the sheet 12 is not crushed. The section is then taken and fixed. The section is then polished and the first filling material is The thickness T2 of the part 14 is measured using a stereo microscope (for example, product name "Digital Microscope VHX-7 The measurements were taken using a stereo microscope ("Digital Microscope" manufactured by Keyence Corporation). The Crossscope VHX-7000 is mentioned, but it doesn't have to be the VHX-7000; any successor model would be fine. An equivalent stereo microscope such as may be used.

[0100] The two end portions 12G (see FIG. 1) of the sheet 12 extending in the longitudinal direction DR2 are not used as a product. Since the first filling portion 14 is not wound, the length of the first filling portion 14 in the width direction DR1 of the core 11 is If it is equal to or larger than the effective area for commercialization of the body 10, it is smaller than the width W2 of the sheet 12. It's okay if it's small.

[0101] The first filling portion 14 preferably contains a coloring material or a luminescent material. When the first filling portion 14 protrudes from the roll body 10, This makes it easy to visually check the thickness, length, and other properties of the first filling portion 14.

[0102] When the first filling portion 14 is colored, the color of the first filling portion 14 is not particularly limited. However, the presence of the first stuffing portion 14 can be reliably detected, and the components of the first stuffing portion 14 can be accurately detected by the winding device. From the viewpoint that adhesion is less noticeable, white, gray, etc. are preferable.

[0103] When the first filling portion 14 is colored, the first filling portion 14 includes a coloring material. If 14 is a cured coating material, the coloring material must not inhibit the curing. The coloring material may be either a pigment or a dye, and may also be an organic coloring material. The coloring material may be either an inorganic coloring material or a coloring material of a titanium oxide. Examples of the binder include tan, carbon black, and mixtures thereof.

[0104] When the first filling portion 14 is colored, the content of the coloring material in the first filling portion 14 is 0. The content of the coloring material is preferably 1% by mass or more and 50% by mass or less. If the content is 50% by mass or less, the first filling portion 14 can be visually confirmed. For example, whether the coloring material is an inorganic material or an organic material, good reworkability can be maintained.

[0105] When the first filling portion 14 contains a luminescent material, the luminescent material is not particularly limited, but may be a fluorescent material. When the first filling portion 14 contains a fluorescent material or a phosphorescent material, By irradiating the first filling section 14 with ultraviolet light, visible light, or the like, the fluorescence in the first filling section 14 is It is possible to make materials and phosphorescent materials emit light.

[0106] The shape of the surface 14B of the first filling portion 14 is preferably convex upward. If the shape is convex upward, the sheet 12 can be lifted up more than if the shape is concave downward. Whether the shape of the surface 14B is upwardly convex or not depends on the thickness T As with 2, it can be judged from the graph of the position displacement curve. At the rough edge, the location of the first filling portion 14 is higher than the height of the winding core 11. Therefore, the amount of displacement increases. The displacement 0 mm line and the position where the amount of displacement starts to increase The position E2 (see FIG. 10), which is the intersection point of the displacement curve, is identified. Then, the position E1 and the position E2 Draw an imaginary line IL3 (see FIG. 10) that passes through the position displacement that exists between the position E1 and the position E2. The ratio of the number of peaks located above the imaginary line IL3 to the number of peaks on the curve is 50% or more. If there is a gap, it can be determined that the shape of the surface 14B of the first filling portion 14 is convex upward. Among the peaks of the position displacement curve existing between position E1 and E2, the number of peaks that is 50% or more is assumed to be If the ratio of the number of peaks located below the imaginary line IL3 is less than 50%, the first filling section 14 The shape of the curve is determined to be concave downward. The graph for determining the shape of the first filling portion 14 is a graph for determining the shape of the first filling portion 14. The markings are 5 mm and each division on the vertical axis is 0.02 mm.

[0107] When the shape of the surface 14B of the first filling portion 14 is convex upward, a virtual line I The average distance D1 from L3 to the position displacement curve is preferably 0.003 mm or more. If the average distance D1 is 0.003 mm or more, the sheet 12 can be lifted effectively. Therefore, the step difference can be further reduced. The lower limit of this average distance D1 is 0.01 It is more preferable that the average distance D1 is equal to or larger than 1 mm. To prevent this from causing unevenness, the thickness must be 0.1mm or less, or even 0.07mm or less. The average distance D1 is preferably set to a value greater than the virtual line IL3. The seven peaks that are convex upwards are read, and the five values ​​excluding the maximum and minimum values ​​are averaged. The peak to be read is the peak, and the larger part is selected.

[0108] The slope of the imaginary line IL3 with respect to the horizontal axis of the position displacement curve graph is 0.0020 or more and 0.0 It is preferable that the ratio is 130 or less, and more preferable that the ratio is 0.0030 or more and 0.0070 or less. It is preferable that the slope is 0.0050 or more and 0.0060 or less. , if it is 0.0050 or more, the filling material can be filled without denting, and 0. If the thickness is 0060 or less, the filling material can be filled without causing a large protrusion. The lower limit of the slope must be 0.0020 or more, 0.0030 or more, or 0.040 or more. is preferable, and the upper limit is 0.0130 or less, 0.0120 or less, or 0.0100 or less. It is preferable that there is.

[0109] The thickness of the first filling portion 14 gradually decreases from the vicinity of the separation position P1 toward the tip surface 12A1. It is preferable that the thickness of the first filling portion 14 is changed in this manner. Therefore, the sheet 12 is wound in the radial direction DR3 of the core 11 (the normal Since it is possible to suppress a sudden change in height in the direction of the wire, the step caused by the winding start end 12A is mitigated. It is possible.

[0110] If the thickness of the first filling part changes suddenly, deformation will remain due to this thickness change. As a result, the step caused by the winding start end may not be fully alleviated. It is preferable to ensure that the length of the first filling portion is sufficient for the thickness of the sheet. If increasing the length of the filling section would have an effect on other aspects such as winding, the first filling section By making the length of the first filling portion shorter than the optimal state, the length of the first filling portion is increased to a level higher than the optimal length of the first filling portion. Although the deformation relaxation length is increased, the deformation relaxation length is shorter than if the first filling portion is not provided. Therefore, when the fourth intermediate portion 18 is present as shown in FIG. The thickness T2 of the first filling portion 14 at the position where the first filling portion 14 contacts the tip surface 12A1 is The length L1 (see FIG. 4) in the longitudinal direction DR2 of the sheet 12 and the length L2 in the fourth intermediate portion 18 The ratio of the total length L2 (see FIG. 4) along the longitudinal direction DR2 of the sheet 12 (length L1 It is preferable that the length (L2) / thickness (T2) is 90 or more. In the case where the filling portion 18 does not exist, the first filling portion 14 is in contact with the tip surface 12A1. The thickness T2 at the position where the first filling portion 14 contacts the tip surface 12A1 is The length L1 (see FIG. 7) of the first filling portion 14 along the longitudinal direction DR2 of the sheet 12 It is preferable that the ratio (length L1 / thickness T2) is 90 or more. The lower limit of these ratios is From the viewpoint of shortening the deformation relaxation length, it is 100 or more, 110 or more, 120 or more, or 1 It is preferable that the ratio is 40 or more. The upper limit of these ratios is not particularly limited, but may be, for example, For example, 1200 or less, 1000 or less, 800 or less, 500 or less, or 300 or less. Good too.

[0111] The length L1 is the length of the tip surface 12 of the first filling portion 14 along the longitudinal direction DR2 of the sheet 12. The length L2 is the length from the position where the sheet 12 contacts the A1 to the end on the side of the separation position P1. The first round of the sheet 12 and the second round of the sheet 12 are aligned from a position directly above the tip surface 12A1 along the longitudinal direction DR2. The length L1 and the length L2 are the length to the end of the position where the sheet 12 contacts. As in 2, it can be obtained from the graph of the position displacement curve. The presence of the fourth intervening part is confirmed by the method. If the fourth intervening part is present, the position displacement bending The above-mentioned positions E1 and E2 are found from the line graph. Then, passing through the above-mentioned position E2, Then, draw an imaginary line IL4 (see FIG. 10) perpendicular to the 0 mm displacement line. If the intersection point of 4 and the 0 mm displacement line is position E3, find the distance between position E2 and position E3. By doing so, the total length of the length L1 and the length L2 can be obtained. If there is no such position, the distance between position E2 and position E3 can be calculated by the above method. The length L1 can be calculated by

[0112] From the viewpoint of reducing the step, the longer the length L1, the better. For example, If the thickness is 50 μm or more and 200 μm or less, the length L1 must be 110 μm or more. Preferably, in order to further shorten the deformation relaxation length, it is set to 1 mm or more, and further set to 10 mm or more. However, if the length L1 is too long, the first filling portion 111 may be formed in an upward convex shape in the processing. It is difficult to form the first filling part, and there is a risk of wavy thickness unevenness occurring in the first filling part. The upper limit of the length L1 is set so that the first filling portion 14 having an upward convex shape can be easily obtained and wavy thickness unevenness can be suppressed. From this viewpoint, it is preferable that the distance be 100 mm or less.

[0113] The above (length L1 + length L2) / thickness T2 or length L1 / thickness T2 is determined by the shape of the first filling portion 14. However, it is possible to more accurately express the shape of the first filling portion 14 as being convex upward. To express this, a planar direction including the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11 is further It is preferable to use the area of ​​the first filling portion 14 in the plane. When the filling portion 18 is present, the filling portion 14 is in contact with the tip surface 12A1. A planar direction including the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11 with respect to the thickness T2. The outer peripheral surface 11A of the winding core 11 and the surface 14 of the first stuffing portion 14 in the plane (the plane shown in FIG. 4) B and the outer peripheral surface 11A of the winding core 11 and the fourth intermediate portion The ratio of the total area S1 of the region R2 sandwiched by the surface 18A of the portion 18 (see FIG. 6) to the total area S2 of the region R2 sandwiched by the surface 18A of the portion 18 (see FIG. 6) It is preferable that the ratio of area S2) / thickness T2) is 3.0 or more. The area S1 represents the cross-sectional area of ​​the first filling portion 14. Also, the surface area of ​​the region R2 in FIG. The area S2 is the cross-sectional area of ​​the fourth intermediate portion 18, the cross-sectional area of ​​the sheet 12 in the region R2, and the area It represents the total cross-sectional area of ​​the fixing member 17 in the region R2. The sheet 12 on the first filling portion 14 and the fourth intermediate portion 18 is peeled off to expose the first filling portion 14 and the fourth intermediate portion 18. In the illustrated example, the fourth intermediate portion 18 is exposed. The thickness T2 of the filling portion 14 is determined based on the longitudinal direction DR2 of the sheet 12 and the radial direction DR of the core 11. The outer peripheral surface 11A of the winding core 11 and the first stuffing portion 14 in a plane including ... The ratio (area S1 / thickness T2) of the area S1 of the region R1 sandwiched between the surfaces 14B is 3.0 or more. If these ratios are 3.0 or more, the area S1 and the thickness T2 are Since the total area S2 or the area S1 is large, the first filling section 14 can effectively hold the sheet 12. The lower limit of these ratios can be increased, thereby further reducing the step. From the viewpoint of further mitigating the above-mentioned step, The upper limit of these ratios is not particularly limited. However, it may be, for example, 50.0 or less, or even 17.0 or less.

[0114] The sum of area S1 and area S2, or area S1, is the area from position E2 to position E3, As shown in FIG. 11, the product of the thickness t at each measurement point MP and the width d between each measurement point MP is calculated. The width between the measurement points can be calculated by summing them up. It can be calculated from the period, the rotation speed of the core, and the outer diameter of the core. The width between the two points can be calculated using the following formula (3). In formula (3), d(μ m) is the distance between the measurement points, ΔT (s) is the sampling period, and r (rpm) is the core speed. is the rotation speed, φ (mm) is the outer diameter of the winding core, and π is the circular constant. d=ΔT×(r / 60)×φ×π×1000 …(3)

[0115] As mentioned above, the core is often reused after the roll body is used, so reworkability is important. For this reason, the first filling portion 14 is not bonded to the winding core 11. If the reworkability is good, the core can be reused after the roll body is used. In this specification, "the core can be reused" means that the entire outer circumferential surface of the core is visually observed. This means that there is no adhesion that may cause a step. It depends on the filler material used. In this case, it may be easier to remove the edge thickness T1 if it is thin. If the hardness is not too high and the material has rubber elasticity, the thicker the edge thickness T1, the easier it is to remove. In either case, visual inspection must confirm that no adhesions that could cause unevenness remain. In the present specification, the term "adhesion" includes adhesion. Since the first filling portion 14 is not adhered to the winding core 11, the first filling portion 14 can be easily peeled off. The first filling section 14 is suitable for cleaning and wiping the core 11. The winding core 11 is wound around the end of the first stuffing section 14 using a blade to prevent damage to the winding core 11. It is more preferable that the paper can be peeled off slowly from the core 11 with a finger or the like after creating an opening. It is more preferable that the first filling portion 14 does not substantially contain an adhesive component.

[0116] 90° peeling, in which the constituent material of the first filling portion 14 is peeled off perpendicularly to the outer peripheral surface 11A of the core 11 When the test was carried out, it was found that the film peeled off from the outer peripheral surface 11A of the core 11 with a tensile force of less than 2.0 N. It is preferable that when the above-mentioned constituent material is peeled off with a tensile force of less than 2.0 N, the first filling portion is easily peeled off. 14 can be peeled off with a tensile force of 0.3 N or less, providing good reworkability. If the above-mentioned constituent material peels off, the first filling portion 14 can be peeled off more easily. , and has excellent reworkability.

[0117] The 90° peel test was performed using a sample and a spring tension gauge (Ohba Instruments Manufacturing Co., Ltd.). Specifically, a mold larger than the size of the sample is first prepared. The mold is then placed on the outer peripheral surface 11A of the core 11. Then, the first filling portion 14 is formed in the mold. A coating material for forming the layer is poured in and cured as necessary to obtain a material layer. The material layer is removed from the mold and cut into pieces of 20 mm x 100 mm using a cutter or the like. Then, ten samples are obtained, each of which is provided on the outer peripheral surface 11A of the core 11. One end of the sample was held by a spring tension gauge and the temperature was 25°C and the relative humidity was 30%. In an environment of 70% or more or less, the tensile force is measured, and the winding core 11 is wound vertically to the outer peripheral surface 11A of the winding core 11. Then, the end is pulled up and the sample is peeled off at a peeling speed of 10 mm / sec. Among the 10 samples that underwent the peel test, the samples with the highest and lowest tensile strength were The arithmetic average value of the tensile strengths of the eight samples excluding the sample is regarded as the tensile strength of the above-mentioned constituent material.

[0118] The tensile strength of the material constituting the first filling portion 14 is preferably 3.0 MPa or more. If the tensile strength of the constituent material is 3.0 MPa or more, the first filling portion 14 can be peeled off without any trouble. The filling portion 14 is not easily torn off, and good reworkability can be obtained. The lower limit of the strength is 3.2 MPa or more or 3.4 MPa from the viewpoint of obtaining excellent reworkability. Moreover, if the tensile strength of the above-mentioned constituent materials is too high, the first filling Since the cushioning properties of the padding are poor, the upper limit of the tensile strength of the above-mentioned constituent materials is set to 100%. In order to obtain the above, the pressure should be 16.0MPa or less, 8.0MPa or less, or 5.5MPa or less. is preferred.

[0119] The tensile strength of the above constituent materials is measured using samples and and Tensilon universal testing machine (product name "RTC-1310A", A&D Co., Ltd. Specifically, the measurement can be performed using a 3D printer that is larger than the size of the sample. A mold is prepared and placed on the outer peripheral surface 11A of the winding core 11. Then, a first filling portion is formed in the mold. The coating material for forming 14 is poured in and cured as necessary to obtain a material layer. After that, the material layer is removed from the mold and a punching blade (e.g., Tensile No. 2 manufactured by Kobunshi Keiki Co., Ltd.) is used. Dumbbell-shaped punching blade) for dumbbell-shaped No. 2 punching blade as specified in JIS K6251:2017 The material layer is punched to size to obtain 10 samples. The samples are then stored in an environment at 25°C. The sample is then held under the same temperature for 24 hours. The two ends in the longitudinal direction were gripped, and the initial gripping was performed in an environment with a temperature of 25°C and a relative humidity of 30% to 70%. The tensile test was carried out under the conditions of a fixture distance of 20 mm and a tensile speed of 100 mm / min. Measure the tensile strength. Of the 10 samples, 8 samples excluding the maximum and minimum values ​​were The arithmetic mean value of the tensile strength is regarded as the tensile strength of the above-mentioned constituent material.

[0120] The elongation at break of the material constituting the first filling portion 14 is preferably 200% or more. If the elongation at break of the constituent material is 200% or more, the first filling portion 14 is easily elongated. When the filling portion 14 is peeled off, the first filling portion 14 is not easily torn off, and good reworkability can be obtained. The lower limit of the elongation at break of the above-mentioned constituent materials is 250 from the viewpoint of obtaining excellent reworkability. % or more, more preferably 300% or more, or 350% or more. The upper limit of the elongation at break of the material is 850% or less, 600% or less, or 500% or less. The elongation at break of the above constituent materials is based on JIS K6251:2017. Pull and Tensilon universal testing machine (product name "RTC-1310A", A-An Co., Ltd. Tensile strength can be measured using a tensile test piece (manufactured by Dow Jones Industrial Average Temperature, 100°C, 150°F, 100°C, 150°C ...

[0121] The tear strength of the material constituting the first filling portion 14 is preferably 1.0 N / mm or more. If the tear strength of the above-mentioned constituent material is 1.0 N / mm or more, the first filling portion 14 can be peeled off without any difficulty. The filling portion 14 is not easily torn, and good reworkability can be obtained. The lower limit of the tear strength is 2.0N / mm or more, and 4.0N / mm or more from the viewpoint of obtaining excellent reworkability. / mm or more, 6.0N / mm or more, 8.0N / mm or more, or 10N / mm or more It is more preferable that the upper limit of the tear strength of the above-mentioned constituent materials is 35 N / mm or less, 30 The tear strength of the above-mentioned constituent materials may be J In accordance with IS K6252:2007, samples and Tensilon universal testing machine (product name Measurements can be performed using the "RTC-1310A" (manufactured by A&D Co., Ltd.). The samples shall be prepared as described in the tensile strength section.

[0122] The hardness of the material constituting the first filling portion 14 measured with a durometer type A is 95° or less. It is preferable that the pressure during winding is always applied to the tip of the first stuffing part. In addition, pressure may also be applied due to changes over time or environmental changes (temperature, humidity and / or pressure). In order to suppress the step caused by the tip of the first filling part, the tip of the first filling part is Although being thin is also effective, the hardness of the above constituent materials measured with a durometer type A is 95 By using a soft resin such as the one below, the first filling section will not deform due to the pressure when the sheet is wound up. In addition, the step caused by the tip of the first filling portion can be suppressed. More preferably, the angle is 80° or less, 70° or less, or 50° or less. When the difference in hardness between the sheet and the first filling part is large, such as when the sheet is hard and the first filling part is soft. If the fourth interposed portion does not exist, only the first filling portion will be filled by the pressure during winding of the sheet. The sheet is compressed, and the step caused by the beginning of the winding is not fully alleviated, causing some deformation in the sheet. Therefore, the lower limit of the hardness is set to 10° or more, 15° or more, 20° or more, Or, it is preferably 25° or more.

[0123] Durometer type A hardness measurements are performed in accordance with JIS K6253:1997. Specifically, a mold larger than the size of the sample is prepared and placed on the core. Then, a coating material for forming the first filling portion 14 is applied to the mold. The material is poured into the mold and cured as necessary to obtain a layer of material. The layer of material is then removed from the mold. In both cases, the material layer is cut out using a cutting machine or similar to produce a sheet of 100 mm x 100 mm in size and 10 mm in thickness. Obtain 10 samples of durometer type A (product name "GS-71 9N (TYPE A), manufactured by Techlock Corporation) at a temperature of 25°C and a relative humidity of 30%. Hardness is measured under an environment of ~70%. 8 out of 10 samples, excluding the maximum and minimum values, are The arithmetic mean value of the hardness of the samples is defined as the hardness of the constituent material.

[0124] When the sheet is wound, the coating material flows to reduce the unevenness caused by the beginning of the winding. However, when the coating material is a curable polymer composition, it may shrink during subsequent curing. In this case, particularly when the fourth intermediate portion does not exist, the first filling portion does not sufficiently reduce the step, There is a risk that the sheet may be slightly deformed. The linear shrinkage of the above-mentioned constituent materials is preferably 1.5% or less. If there is a gap, the first filling part can be formed with excellent dimensional stability, so the first filling part can sufficiently reduce the step. The upper limit of the linear shrinkage rate of the first filling portion 14 is set to 0.5 mm from the viewpoint of more sufficiently reducing the step. From this viewpoint, it is more preferable that the content is 1.3% or less, 1.0% or less, or 0.7% or less. The lower limit of the heat shrinkage rate may be 0% or more.

[0125] The linear shrinkage of the above-mentioned constituent materials can be measured as follows. A mold having a size of 130 mm or more is prepared, and a mold is filled with a material for forming the first filling portion 14. The coating material is poured into the mold and cured to obtain a sample (molded product). After it has completely cured, Measure the dimensions of the sample and compare them with the inside dimensions of the mold according to JIS K6249:2003 The linear shrinkage rate is calculated based on the following. Of the 10 samples, 8 samples excluding the maximum and minimum values ​​are The arithmetic average value of the linear shrinkage coefficients of the samples is taken as the linear shrinkage coefficient of the above-mentioned constituent material.

[0126] The first filling portion 14 can be formed by flowing or deforming the filling material. If the filling material exhibits fluidity, it is preferable to use a filling material that is capable of flowing before or during the rolling of the sheet. As long as the filling material exhibits fluidity at certain times, it does not necessarily have to exhibit fluidity at all times. Examples of such tapes include filler or filling tape.

[0127] The coating material is a material that can be coated, and has flowability, for example, when coated or rolled. Mobility-sensitive coating materials include not only liquids, but also materials that change from liquid to solid, materials that change when heated, etc. Depending on the type of coating material, the coating material may be a solid having flowability or a curable material. In this case, the first filling portion 14 is formed from a hardened product of a hardenable material.

[0128] Examples of coating materials include curable polymer compositions, thermoplastic resins, oils, starches, adhesives, etc. Examples of the adhesive include an adhesive, an adhesion agent, and a sol.

[0129] Examples of the curable polymer composition include a curable resin composition and a curable rubber composition. When using thermoplastic resin as the fabric material, the flowability is increased by heating during application and wrapping. It is necessary to make the state have the above.

[0130] The filling tape is a tape that becomes the first filling portion 14 by filling the first gap 13. The sheet 12 has a property of expanding by capillary action due to the pressure applied when the sheet 12 is wound. The filling tape is attached to or adhered to the outer peripheral surface 11A of the core 11. It is used in this way.

[0131] As described above, the first filling portion is required to have reworkability. For example, if the coating material is a sealant material, the sealant material will adhere firmly to the core. In contrast, molding materials are designed to be removed from the mold. Therefore, from the viewpoint of reworkability, the filling material ( For example, as a coating material, a molding material is preferred.

[0132] The shear viscosity of the filling material (e.g., coating material) at 25°C and a shear rate of 1 / s is 500 For example, the filler material applied to the core (e.g., Using a spatula or similar tool, spread the filling material and shape the filling material before rolling the sheet. However, if the filling material is spread by such a process, it may cause serious damage. In contrast, if the shear viscosity of the filler material is 500 Pa·s or less, The pressure applied when winding the roll can be used to expand the filling material into the desired shape, so the filling material can be The special process of spreading can be omitted. The shear viscosity is 200 Pa·s or less. From the viewpoint of easily spreading the filling material, the shear viscosity is preferably 3. It is preferable that the viscosity is 00 Pa·s or less, 100 Pa·s or less, or 50 Pa·s or less. .

[0133] On the other hand, the shear viscosity is set to 10 Pa·s or more from the viewpoint of shortening the deformation relaxation length. The viscosity is preferably 75 Pa·s or less, and more preferably 20 Pa·s or more and 50 Pa·s or less. If the shear viscosity is 10 Pa·s or more, the fluidity will not be too high, and the shear viscosity will not be too high. If the deformation of the first filling part 12 can be mitigated and the deformation caused by the tip of the first filling part is less than 75 Pa·s, The shape can be suppressed.

[0134] Furthermore, from the viewpoint of further suppressing the overflow of the filling material, the shear viscosity is set to 15 Pa· If the viscosity is 20 Pa·s or more, and even 20 Pa·s or more, the filling from between the core 11 and the sheet 12 during application can be prevented. This is preferable because it can prevent the filler from spilling out. Furthermore, the shear viscosity is 60 Pa·s or more. If the shear viscosity is 60 Pa·s or more, the fluidity of the filling material is high. The filling material is low and is absorbed between the core and the sheet during application and / or by pressure during winding. However, it is possible to prevent the ink from spilling over the limit.

[0135] The shear viscosity of the filling material is measured using a dynamic viscoelasticity measuring device (e.g., Anton Paar, Inc.) The measurement can be performed using a parallel plate with a diameter of 25 mm. The test was performed at a shear rate of 1[1 / The shear viscosity of the filling material at 1000 s was measured 10 times, and the maximum and minimum shear viscosities were calculated. The shear viscosity is calculated by calculating the arithmetic mean value of the eight shear viscosities excluding the smallest value.

[0136] It is preferable that the filling material (e.g., the coating material) does not contain a volatile component such as a solvent. Since the material does not contain volatile components, the first filling portion 14 is prevented from cracking or changing in shape. It is small and does not easily leave sheet marks.

[0137] (Coating material) The coating material can be applied when the first filling portion is formed, but is fluid in the state of the roll body 10. In the present specification, the term "material having low fluidity in the rolled state" is used. "No spillage of coating material from the roll body occurs during transportation and manufacturing of the roll body" When forming the first filling portion 14 in the first gap 13, the coating material can be applied. However, if the coating material has a high fluidity in the roll body 10, it may become difficult to transport or manufacture the coating material. During manufacturing, the first filling part may protrude and cause dirt. However, it can be applied when forming the first filling portion 14, and the fluidity is low in the state of the roll body 10. If the material is a non-stick material, the first filling portion 14 can be formed in the first gap 13 and the first filling portion 14 can be easily formed. This can prevent the overflow and dirt of the resin. However, examples of materials that have low fluidity in the state of the roll body 10 include curable polymer compositions. Can be obtained.

[0138] When the coating material is a curable polymer composition, the coating material may be, for example, a curable polymer composition that is curable by ionizing radiation. Polymer compositions (ionizing radiation curable resin compositions and ionizing radiation curable rubber compositions), heat curing thermosetting polymer compositions (thermosetting resin compositions and thermosetting rubber compositions), room temperature curable polymer compositions (Polymer composition that cures at room temperature of about 20° to 30° C.) (Room temperature curing resin composition or room temperature curing resin composition) A thermally curable rubber composition, etc. can be used.

[0139] The room temperature curable polymer composition includes, for example, a two-component curable polymer composition consisting of a base agent and a curing agent. There is a one-part hardening polymer composition that hardens when exposed to moisture in the air or in the composition. The part in the center of the tube is almost sealed with the sheet wrapped around it. In contrast, two-component curing polymers are difficult to come into contact with air and may not cure sufficiently. The reaction starts when the base compound and hardener are mixed, so the hardening process can be completed simply by controlling the time. In addition, the two-component curable polymer composition has a higher storage stability than the one-component curable polymer composition. This is preferred because it has excellent properties.

[0140] Examples of the ionizing radiation curable polymer composition include those having a (meth)acryloyl group, a vinyl group, Examples of the composition include a composition containing a compound having an ethylenically unsaturated group such as an aryl group. The ionizing radiation to be irradiated when curing the radiation-curable polymer composition includes visible light, ultraviolet light, and the like. , X-rays, electron beams, alpha rays, beta rays, and gamma rays.

[0141] The ionizing radiation curable polymer composition can be, for example, cured by irradiating it with ionizing radiation. Examples of the acrylic gel composition include an acrylic gel composition that forms a cellulose-based gel. Ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate ) acrylate, n-butyl (meth)acrylate, i-butyl (meth)acrylate, 2-Ethylhexyl (meth)acrylate, n-Hexyl (meth)acrylate, n-Acetylated Amyl (meth)acrylate, i-amyl (meth)acrylate, octyl (meth)acrylate acrylate, i-octyl (meth)acrylate, i-myristyl (meth)acrylate, lauryl Uryl (meth)acrylate, Nonyl (meth)acrylate, i-Nonyl (meth)acrylate acrylate, i-decyl (meth)acrylate, tridecyl (meth)acrylate, stearyl In this specification, the term "methacryl (meth)acrylate" includes isostearyl (meth)acrylate, i-stearyl (meth)acrylate, and the like. In this regard, "(meth)acrylate" refers to both "acrylate" and "methacrylate." This meaning includes both ways.

[0142] Examples of the thermosetting polymer composition and the room temperature curable polymer composition include urethane resins. Examples of the composition include an epoxy resin composition, a silicone composition, and the like. A corn composition can be preferably used. As the silicone composition, a silicone gel can be used. Examples of the composition include a rubber composition and a silicone rubber composition, both of which are effective in reducing the above-mentioned step and deformation. It is preferable.

[0143] The silicone gel composition of the present specification is formed by curing the silicone gel composition. "Silicone gel" is a silicone gel with extremely low crosslinking density, mainly composed of organopolysiloxane. The hardened product has a penetration of 10 mm according to JIS K2220:2013 (1 / 4 cone). This means that the hardness of the rubber is ~150. This is based on the rubber hardness measurement method JIS K6249:2003. The measured value (rubber hardness value) is 0, and the hardness is so low that it does not show a valid rubber hardness value (i.e. In this respect, the silicone rubber composition corresponds to the silicone rubber composition and It is different from cured silicone rubber (rubber-like elastomer).

[0144] Silicone rubber compositions include one-component curing silicone rubber compositions and two-component curing silicone rubber compositions. One-part curing silicone rubber compositions are cured by a condensation reaction at room temperature. There are two types of rubber compositions: hardenable rubber compositions and addition reactive rubber compositions that harden when heated. The curable silicone rubber compositions include condensation reaction curable rubber compositions that cure at room temperature and addition reaction curable rubber compositions. There are two types of rubber: addition-reactive rubber compositions that cure when heated, and addition-reactive rubber compositions that cure when heated. It is also possible to modify the rubber composition with other resins to produce an ionizing radiation curable rubber composition. In the present invention, any of the curing methods is possible. Two-component curing silicone rubber compositions are preferred because they can be cured uniformly and have excellent storage stability. Things are preferred.

[0145] As the silicone rubber composition, for example, RTV (Room Temperature Vulcanizing silicone rubber compositions are examples of RTV silicone rubber. The composition has a smaller shrinkage rate and better dimensional stability than ionizing radiation curable polymer compositions. In addition, since the resin has excellent fluidity before hardening, the gap between the core 11 and the sheet 12 and between the sheets 12 The RTV silicone rubber composition is easy to penetrate into the mold and has low fluidity after curing. Since the material has deep curing properties, the curing reaction tends to proceed uniformly regardless of the thickness of the coating. In addition, this composition has excellent releasability, so the cured product can be peeled off and reassembled into a roll. This makes it easier to prepare the data for use.

[0146] The RTV silicone rubber composition includes a condensation reaction curing RTV silicone rubber based on the curing reaction mechanism. Examples of the silicone rubber composition include a silicone rubber composition and an addition reaction curing RTV silicone rubber composition. Condensation reaction curable RTV silicone rubber The composition is preferred because it does not inhibit curing. In the present invention, the curing shrinkage is large. The thickness of the coating material required to reduce the step tends to be larger for thinner materials. In the case of a sheet (for example, the thickness of the sheet 12 is 3 μm to 45 μm), an addition reaction curing R A TV silicone rubber composition is preferably used.

[0147] The RTV silicone rubber composition does not require any special processing equipment, and is therefore a liquid silicone. Liquid Silicone Rubber (LSR) is preferred.

[0148] In addition, the above-mentioned various compositions may contain functional components to exhibit desired functions. For example, since a silicone rubber composition is generally an electrical insulator, The device may become charged by contact with the shield 12 or other objects. The rubber composition may contain a conductive filler. Since it is possible to prevent the inclusion of foreign matter, it is possible to suppress the occurrence of the above-mentioned step.

[0149] The conductive filler mixed into the silicone rubber composition is carbon black (acetylene). black or ketjen black), silver powder, gold-plated silica or graphite, In recent years, ion-conductive silicone rubber has also been developed. This ion-conductive silicone rubber can also be used.

[0150] The silicone gel composition may contain optional ingredients within the scope of the present invention. The optional components include, for example, a reaction inhibitor, an inorganic filler, a silicon atom, Organopolysiloxane containing no bonded hydrogen atoms and no silicon-bonded alkenyl groups, Examples of the additives include thermal resistance imparting agents, flame retardant agents, thixotropy imparting agents, pigments, and dyes.

[0151] The reaction inhibitor is a component for suppressing the reaction of the composition, and specifically, for example, , acetylene-based, amine-based, carboxylate-based, phosphite-based, etc. reaction inhibitors Examples include:

[0152] Examples of inorganic fillers include fumed silica, crystalline silica, precipitated silica, and intermediates. Vacant fillers, silsesquioxanes, fumed titanium dioxide, magnesium oxide, nitrous oxide Lead, iron oxide, aluminum hydroxide, magnesium carbonate, calcium carbonate, zinc carbonate, layered Inorganic fillers such as mica, carbon black, diatomaceous earth, and glass fiber; Organoalkoxysilane compounds, organochlorosilane compounds, organosilazane compounds Examples of such fillers include fillers whose surfaces have been hydrophobized with organic silicon compounds such as low molecular weight siloxane compounds. Silicone rubber powder, silicone resin powder, etc. may also be added. stomach.

[0153] When the coating material is an adhesive, the adhesive may be a denture adhesive. Denture adhesives can be broadly divided into denture adhesives and home reliners. A dental adhesive can be used. The adhesive can be, for example, a powder type, such as a denture adhesive. When classified as cream type or tape type, this is an adhesive used as a coating material. is a powder or cream type adhesive.

[0154] The adhesive may be one that exhibits adhesiveness by itself or one that exhibits adhesiveness in response to moisture. For example, when a powder-type adhesive comes into contact with moisture, it absorbs the water and becomes sticky. Cream-type adhesives are, for example, adhesive powder components made into a cream with an ointment base. This indicates that the adhesive is sticky.

[0155] The adhesive preferably contains a water-soluble polymer. The water-soluble polymer is not particularly limited. For example, alginic acid, alginates (e.g., sodium alginate, alginic acid potassium, ammonium alginate, alginate esters, etc.), natural polymer compounds (e.g. For example, gum arabic, gum tragacanth, locust bean gum, xanthan gum, guar gum gum, agar, gelatin, karaya gum, carrageenan, etc.), cellulosic polymers (e.g., cellulose, sodium carboxymethylcellulose, hydroxyethylcellulose , hydroxypropyl methylcellulose, hydroxypropyl cellulose, etc.), polyethylene Polyethylene glycol, polyvinylpyrrolidone, polyvinyl alcohol, methyl vinyl ether , carboxyvinyl polymer, copolymer of acrylamide and acrylic acid, polyacrylic Examples of the water-soluble polymer include sodium hydroxide and polyethylene oxide. may be used alone or in any combination of two or more.

[0156] Among the above cellulose-based polymers, sodium carboxymethylcellulose is preferred. Sodium carboxymethylcellulose is a polycarboxymethyl ether of cellulose. It is the sodium salt of carboxymethylcellulose, also known as carmellose sodium. Sodium stearate is a powder that, when moistened, becomes hydrated and sticky or elastic. This provides additional tack to the adhesive.

[0157] The adhesive as the coating material may be oil-based, water-based, or powder-based, as long as it can be applied. agents, gum bases, excipients, emulsifiers, humectants, pH adjusters, viscosity adjusters, plasticizers, pigments, etc. These bases and additives are widely used in denture adhesives. Examples of bases and additives used include:

[0158] For example, an oily base is used when preparing a paste-like adhesive such as a cream type. The oil-based base is used as a base for non-aqueous adhesives (e.g., creams, Mineral oil components commonly used in petrolatum (e.g., liquid paraffin, petrolatum, gelatin, carbonized Hydrogen, etc.

[0159] Examples of cream-type adhesives include Shin Polygrip (registered trademark) S and Shin Polygrip Polident® V, New Poligrip® Free, Polident® NE O Denture adhesives (both from GlaxoSmithKline Consumer Healthcare) Japan Co., Ltd.), Tough Grip (registered trademark) Cream Additive-free (Kobayashi Pharmaceutical Co., Ltd.), Lecto (registered trademark) Cream (Shionogi Pharmaceuticals Co., Ltd.) can be used.

[0160] If the applied material is an adhesive, the adhesive should be a denture adhesive called a home reliner ( Adhesives are used to improve the marginal closure effect and increase adhesion. Such an adhesive agent may include, for example, a water-insoluble polymer. The water-insoluble polymer is not particularly limited, but may be, for example, a polyvinyl acetate resin. Examples of suitable resins include vinyl resins.

[0161] As an adhesive, for example, Polident® Cushion (GlaxoSmithKline (manufactured by Nichicon Consumer Healthcare Japan, Inc.), Tough Grip (registered trademark) cushion Transparent, Tough Grip (registered trademark) Cushion Pink, Soft Tough Grip (registered trademark) ) (both manufactured by Kobayashi Pharmaceutical Co., Ltd.), Cushion Correct (registered trademark) EZ (Shionogi & Co., Ltd.) Lion Corporation), New Liondent White, New Liondent Pink (both manufactured by Lion Corporation) ) etc. can be used.

[0162] When the coating material is a sol, the sol may be a silica sol, an alumina sol, or a zirconium sol. Metals such as NiO2 sol, titanium oxide sol, cerium oxide sol, tin oxide sol, and niobium oxide sol Examples include oxide sols.

[0163] The coating material does not flow too much, while the first round of the sheet 12 is pulled from the outer peripheral surface 11A of the core 11. In order to make the coating material flow to the vicinity of the separation position (separation position) P1, It is desirable to appropriately adjust the viscosity of the composition.

[0164] The coating material is applied in a line shape, but the amount of coating material per unit width is 1 / 100th of the first filling section 14. It is preferable that the amount is such that the thicknesses T1 to T3 in the above ranges are obtained. Specifically, for example, the lower limit of the amount of coating material per unit width is 0.2 cm 3 / m or more If the amount of the coating material is too small, for example, the coating with a syringe may be When doing so, air may get trapped, making it difficult to dispense the coating material from the syringe or When applying the coating by running the roller, the coating may be cut off. 3 This can be prevented by using a coating material per unit width of 1 / m or more. The maximum amount is 3.5 cm 3 It is preferable that the coating amount of the coating material is large. If the coating is too long, the coating material may drip under its own weight or new unevenness may occur. The amount of fabric is 3.5cm 3 This can be prevented if the coating amount is less than the lower limit of 1 / m. is 0.3 cm 3 More preferably, the coating amount is 2.0 cm 3 / m or less, or 1.5cm 3 It is more preferable that the thickness is equal to or less than 1 / m.

[0165] (Filling Tape) The constituent materials of the filling tape include the adhesive, the adhesion agent, or the like described in the above-mentioned application material section. Examples of the gel include a silicone gel formed from the silicone gel composition. acrylic gel, an acrylic gel formed from the acrylic gel composition, polyolefin Gel, polyurethane gel, butadiene gel, isoprene gel, butyl gel, Ethylene butadiene gel, ethylene vinyl acetate copolymer gel, ethylene-propylene- Examples of the filler tape include diene terpolymer gels and fluorine-based gels. For example, Touch Correct II (Shionogi & Co., Ltd.) and αGEL ) (manufactured by Taica Corporation) can be used.

[0166] The length of the filling tape is equal to or greater than the width of the effective area in the width direction DR1 of the core 11. It is preferable that the length of the filling tape is set to such a length, so that the first filling portion can be formed in an effective area. 12 across the entire width of the effective area. The filling tape can reduce the step caused by the starting end 12A of the sheet 12. In order to suppress the protrusion of the filling tape during winding, the core 11 is wound in the width direction DR1. 1mm or more, 10mm or more, or 30m from each end of the short side of port 12 It is preferable that the filling tape is arranged so that the filling tape is spaced apart by at least 1 m. This refers to the length in the width direction DR1 of the tape.

[0167] The width of the filling tape is preferably 5 mm or more. By doing so, the step caused by the winding start end 12A of the sheet 12 can be more effectively alleviated. The minimum width of the filling tape is 6 mm or more, 7 mm or more, or 8 mm or more. The upper limit of the width of the filling tape is set from the viewpoint of suppressing overlapping of the filling tape. From this viewpoint, it is preferable that the width of the filling tape is less than the outer circumferential length of the core 11. It means the length of the sheet 12 in the longitudinal direction DR2 of the tape.

[0168] The thickness of the filling tape is preferably equal to or greater than the height of the upper surface 12A2 of the winding start end 12A. By setting the thickness of the filling tape to such a value, the filling tape can be easily wound around the sheet 12. Since the tape can be spread over a wide area, the tape can be easily wound around the end 12A of the sheet 12. The step can be more effectively alleviated. When the thickness of 12 is 50 μm or more and 200 μm or less, it is 52 μm or more and 220 μm or less. It is preferable that the thickness of the sheet 12 is 3 μm or more and less than 50 μm, and that the thickness of the sheet 12 is 50. It is preferable that the thickness is 5 μm or more and 100 μm or less.

[0169] <Second filling section> The second filling portion 16 is filled in the second gap 15. That is, the second filling portion 16 is The outer peripheral surface 11A of the core 11, the back surface 12C of the sheet 12, and the first end surface 17A of the fixing member 17. It is adjacent to.

[0170] The physical properties of the material constituting the second filling portion 16, such as tensile strength, are similar to those of the material constituting the first filling portion 14. Since these physical properties are similar to those of the tensile strength and the like in the above, the explanation thereof will be omitted here.

[0171] The second filling portion 16 can be formed by applying or deforming a filling material. The filling material may be a coating material or a filling tape. The coating material and the filling tape are the same as those described in the first filling section 14. The second filling part is made of the same material as the first filling part. The material may be the same as that of the filling portion 14, or may be different.

[0172] The thickness of the second filling portion 16 is such that the first end surface 17A of the first turn of the sheet 12 is the outer circumferential surface of the core 11. It is preferable that the width of the light beam 11A gradually decreases toward the arrival position P2 where the light beam 11A arrives. The thickness of the second filling portion 16 changes in this manner to prevent abrupt changes in the thickness of the sheet 12. Since the change in the height direction can be suppressed, the step caused by the fixing member 17 can be reduced. .

[0173] Both end portions 12G of the sheet 12 extending in the longitudinal direction DR2 are not used as a product. Therefore, the length of the second filling portion 16 in the width direction DR1 of the core 11 is It may be smaller than the width W2 of the sheet 12 as long as it is equal to or larger than the effective area for commercialization. .

[0174] <4th intervening part> Since the first filling portion tends to be softer than the sheet, the winding start end of the first filling portion If the height of the contact point of the tip of the sheet is the same as the top surface of the winding start end, the sheet will not be wound. When rotating, there is a risk of a step being generated at the corner between the tip surface of the winding start end and the top surface. When the fourth intermediate portion 18 is formed, the fourth intermediate portion 18 is connected to the first filling portion 14 and the sheet 12. Since the difference in hardness between the tip surface 12A1 of the winding start end 12A and the upper surface 12A1 can be absorbed, In addition, the presence of the fourth intermediate portion 18 reduces the step at the corner of the 2A2. This can prevent stress from concentrating on the step caused by the winding start end 12A, and Since the subsequent deformation of the sheet 12 can be made gentle, this step can be alleviated. Cut.

[0175] The fourth intermediate portion 18 may contain a coloring material or a luminescent material, similar to the first filling portion 14. It is preferable that the fourth intermediate portion 18 contains a coloring material or a light-emitting material, so that the fourth intermediate portion 18 is easily absorbed from the roll body 10. When the fourth intermediate portion 18 protrudes, it is easy to visually recognize the protrusion. The coloring material or the luminescent material contained in the fourth intermediate portion 18 is easily confirmed. Since these are similar to the coloring materials and light-emitting materials explained in the previous section, the explanation will be omitted.

[0176] When the sheet 12 is transparent and the fourth intermediate portion 18 is colored, The presence or absence of 18 can be easily confirmed by visual inspection. The sheet 12 is unwound from the roll 10 until the surface of the sheet 12 becomes the second turn. In the roll 10, the second turn of the sheet 12 is on the surface, and the vicinity of the winding start end 12A is Visually observe whether there is a colored portion on the winding start end 12A. When a colored portion is present on the end portion 12A, the fourth intermediate portion 18 is present. If the colored portion does not exist, the fourth intermediate portion 18 does not exist. It can be determined that:

[0177] Even when the sheet 12 is transparent and the fourth intermediate portion 18 contains a luminescent material, The presence or absence of 18 can be easily confirmed by visual inspection in the same manner as above. When the luminescent material is a material that emits light when irradiated with ultraviolet light or visible light, the material is The presence or absence of the fourth intermediate portion 18 is confirmed by shooting the fourth intermediate portion 18.

[0178] When the thickness of the sheet 12 is 50 μm or more and 200 μm or less, the thickness T3 ( The thickness T of the fourth intermediate portion 18 (see FIG. 4) is preferably 2 μm or more and 110 μm or less. If 3 is within this range, the deformation relaxation length can be shortened while avoiding adverse effects on winding of the sheet 12. It should be noted that even if the thickness T3 of the fourth intermediate portion 18 exceeds 110 μm, The deformation relaxation length can be shortened, but this may adversely affect the winding of the sheet 12. do.

[0179] When the thickness of the sheet 12 is 3 μm or more but less than 50 μm, or even 40 μm or less, the sheet 12 The sheet 12 is deformed by the step caused by the winding start end 12A compared to when the sheet 12 is thick. For this reason, the thickness T3 of the fourth intermediate portion 18 is set to be 0.5 μm or more and 50 μm or less. If the thickness T3 of the fourth intermediate portion 18 is within this range, the sheet 12 is not easily wound. Therefore, the deformation relaxation length can be shortened while avoiding the influence of the deformation.

[0180] The thickness T3 of the fourth intermediate portion 18 is the maximum thickness of the fourth intermediate portion 18. The thickness T3 is measured as follows. The part including the part 18 and the second sheet 12 is taken and fixed so that the part is not crushed. Then, the cross section of this fixed portion is polished, and the thickness T3 of the fourth intermediate portion 18 is measured using a stereomicroscope. Microscope (for example, product name "Digital Microscope VHX-7000", Keyer Corporation) The measurements are taken using a 350-nm gyroscope (manufactured by 350-nm gy

[0181] The fourth intermediate portion 18 can be formed by applying or deforming a filling material. The filling material may be a coating material or a filling tape. The coating material and the filling tape are the same as those described in the first filling section 14. The fourth intermediate portion 18 is made of the same material as the tape, and therefore the description thereof will be omitted. The material may be the same as that of the filling portion 14, or may be different.

[0182] <<Other roll bodies>> The roll body 10 is wound by a tip surface 12A1 of the winding start end 12A of the sheet 12 and a fixing member 17. The second end surface 17B is a cross-sectional view taken along the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11. The sheet 12 is wound in a roll 20 as shown in FIG. The tip surface 12A1 of the starting end 12A protrudes beyond the second end surface 17B of the fixing member 17. In this case, the second gap 15 is filled with the second filling portion 16, and the winding core 1 is 1 and the back surface 12C of the first turn of the sheet 12, and The third gap 21 may be filled with a third filling portion 22 .

[0183] <Third Gap> The third gap 21 is a gap that contacts the second end surface 17B of the fixing member 17. The third gap 21 shown in FIG. 12 is formed between the outer peripheral surface 11A of the core 11 and the rear surface of the first turn of the sheet 12. 12C and the second end surface 17B of the fixing member 17.

[0184] <Third filling section> The third filling section 22 is similar to the second filling section 16, except that it is filled in the third gap 21. Therefore, the description will be omitted here.

[0185] In the roll body 10, the second gap 15 is filled with the second filling portion 16. In order to reduce the step caused by the starting end 12A, the first gap 13 is filled with the first filling portion 14. Therefore, as shown in FIG. 13, the second gap 15 is filled with the first material. The second filling portion 16 may not be filled. The roll body 30 has the second gap 15 formed as a hollow space. is.

[0186] In the roll body 10, the first gap 13 is filled with the first filling portion 14, but the first filling portion 14 is not filled with the fixing member 17. From the viewpoint of reducing the step caused by the above, if the second gap 15 is filled with the second filling portion 16, Therefore, as shown in FIG. 14, the first gap 13 is filled with the first filling portion 14 as in the roll body 40. The roll body 40 has the first gap 13 formed as a hollow space.

[0187] The roll body 10 has one fixing member 17, but as shown in FIG. In the roll body 50 shown in FIG. In addition to the fixing member 7, a fixing member 51 is provided on the first end surface 17A side of the fixing member 17. In the roll body 50, the tip surface 12A1 of the winding start end 12A of the sheet 12 is fixed. Since it protrudes from the second end surface 17B of the member 17, the step caused by the fixing member 17 is suppressed. In order to achieve this, the second gap 15 is filled with a second filling portion 16, and the third gap 21 is filled with a third filling portion 16. It is preferable that the filling portion 22 is filled. Similarly, the roll body shown in FIG. In the case of 50, in order to suppress the step caused by the fixing member 51, The second gap 52 on the first end surface 51A side is filled with a second filling portion 53, and the fixing portion A third gap 54 on the second end surface 51B side of the material 51 is filled with a third filling portion 55. It is preferable that

[0188] <Fixing material> The fixing member 51 has a first end surface 51A and a second end surface 51B on the opposite side. Both the first end surface 1A and the second end surface 51B extend in the width direction DR1 of the core 11. Since 51 is similar to the fixing member 17, the description thereof will be omitted here.

[0189] <Second gap> The second gap 52 is a gap that contacts the first end surface 51A of the fixing member 51. The second gap 52 shown in FIG. 15 is formed between the outer peripheral surface 11A of the core 11 and the rear surface of the first turn of the sheet 12. 12C and the first end surface 51A of the fixing member 51.

[0190] <Third Gap> The third gap 54 is a gap that contacts the second end surface 51B of the fixing member 51. The third gap 54 shown in FIG. 15 is formed between the outer peripheral surface 11A of the core 11 and the rear surface of the first turn of the sheet 12. 12C and the second end surface 51B of the fixing member 51.

[0191] <Second filling section and third filling section> The second filling portion 53 is similar to the second filling portion 16, except that it is filled in the second gap 52. The third filling portion 55 is filled in the third gap 54. Other than that, it is the same as the second filling section 16, so the description will be omitted here. .

[0192] The roll body 10 is provided with a fixing member 17, but as in the case of a roll body 60 shown in FIG. The fixing member 17 may not be provided.

[0193] In Figs. 12, 13, 15, and 16, the length L1, the length L2, the thickness T2, and the thickness T 3. Area S1 and area S2 are not shown, but in the roll bodies 20, 30, 50, and 60, , length L1, length L2, thickness T2, thickness T3, (length L1+L2) / thickness T2, (area S 1+S2) / thickness T2 is the same as in the case of the roll body 10.

[0194] The roll bodies 20, 30, 50, and 60 all have the fourth intermediate portion 18. In this case, the length L1 / thickness T2 and the area S1 / thickness T2 are as shown in FIG. This is similar to the case of the roll body 10 shown in FIG.

[0195] In FIG. 13, the entire surface of the fixing member 17 is in close contact with the winding start end 12A. 8, a first end 12A is provided between the winding start end 12A and the fixing member 17. The filling portion 14 may be recessed.

[0196] <<Roll body manufacturing method>> The roll body 10 can be manufactured, for example, by the following method. As shown in FIG. 1A, a fixing portion is provided on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11. Material 17 is placed.

[0197] After the fixing member 17 is placed, a coating device such as a dispenser or a syringe is used to apply the fixing member 17 as shown in FIG. As shown in (B), the coating is applied to the outer peripheral surface 11A of the core 11 along the width direction DR1 of the core 11. Materials 201 and 202 are applied. The applied material 201 is in contact with the second end surface 17B of the fixing member 17. The coating material 202 is applied so as to come into contact with the first end surface 17A of the fixing member 17. In this case, for example, two coating devices are used to coat the coating materials 201 and 202. may be applied simultaneously.

[0198] In the above, the coating material 201 is applied so as to come into contact with the second end surface 17B. The fabric material 202 is applied to the first end surface 17A so as to come into contact with the fabric material 202. If the viscosity of the coating material is low, the coating material is applied so as to contact the second end face and the first end face. When the sheet is wound, the coating material penetrates between the winding start end and the fixing member, and the It is possible for the coating material to spread between the back surfaces. By controlling the coating material, it is possible to achieve a desirable state. However, excessive impregnation or spreading can result in curing in uncontrollable locations. In addition, if the viscosity of the filling material is high (for example, if the filling material is in the form of a tape), a new step may be created. In the case of materials with low wettability such as filler materials or coating materials, the placement of the filler material or coating material may cause the Since it is highly likely that the adhesive will only spread to the area around the adhesive and harden, it may be difficult to prevent the adhesive from hardening by winding it in the later process. If the material is not sufficiently wetted and spread, the material will harden in a thick state near the beginning and end of the roll. Therefore, the coating material 201 is It is preferable that the coating material be applied close to the second end surface 17B of the fixing member 17. The material 202 is preferably applied adjacent to the first end surface 17 A of the fixing member 17 . In this specification, "close" refers to a position that is clearly separated from the winding start end or the fixing member. For example, even if the coating material is low viscosity, the starting end of the winding or the The distance should be 0.3 mm or more. The distance should be 0.5 mm or more. From the viewpoint of maximum stability, the distance is preferably 1 mm or more. If the distance is too large, it will be difficult to obtain the effect of mitigating the step. It is preferable to adjust the distance within a range in which the part 14 can be completed. For example, the upper limit of this separation distance is It is preferable that the distance is 10 mm or less, 7 mm or less, and more preferably 5 mm or less. If the distance exceeds 10 mm, the first gap may not be filled, and depending on the diameter of the core, However, there is a risk that the coating material may run off before the sheet is wound. If the amount of coating is too large, it is recommended to increase the amount of coating. The separation distance is measured at 10 points and the measured The arithmetic mean value of the eight distances excluding the maximum and minimum values ​​was calculated. Therefore we request.

[0199] If the viscosity of the coating material is high, the coating material will not spread easily, so the above distance should be closer. When the viscosity of the coating material is low, if the separation distance is too small, the coating material may If the separation distance is too large, the particles may be scattered in a different direction. The above distance should be small because the adhesive may spread too much and not fill the desired gap sufficiently. It is preferable that the size is not too large and not too small.

[0200] In the above, the fixing member 17 is disposed on the outer peripheral surface 11A of the core 11, and then the fixing The coating materials 201 and 202 are applied to both sides of the member 17, and the coating materials 201 and 202 are applied to both sides of the member 17 by the following manufacturing methods (1) to (3). The application of the application materials 201 and 202 and the arrangement of the fixing member 17 may be performed in the order of Among these, the following manufacturing method (2) is preferable. The coating materials 204 and 205 described later are also Same here.

[0201] In the manufacturing method (1), a fixing member 17 is arranged on the outer peripheral surface 11A of the core 11, and then the fixing member 1 The coating material 201 is applied to the second end surface 17B side of the nozzle 7 so as to achieve the above-mentioned separation distance, and then The coating material 202 is applied to the first end surface 17A side of the fixing member 17 so as to achieve the above-mentioned separation distance. This is a method.

[0202] In the manufacturing method (2), a coating material 201 is applied to the outer peripheral surface 11A of the core 11, and then the coating material The fixing member 17 is disposed so that the distance from the material 201 is the above-mentioned distance. Then, The coating material 201 on the fixing member 17 is spaced from the fixing member 17 by the above-mentioned distance. The coating material 202 is applied to the opposite side. By applying the coating agent 2 and disposing the fixing member 17, the electrodes can be disposed with a stable separation distance. In this way, it is possible to prevent excess coating materials 201, 202, etc. from being applied onto the fixing member 17. Therefore, the occurrence of a new step on the fixing member 17 can be suppressed.

[0203] In the manufacturing method (3), coating materials 201, 20 are applied to the outer peripheral surface 11A of the core 11 at predetermined intervals. 2 is applied, and then a fixing member 17 is disposed between the applied materials 201 and 202.

[0204] In addition, in the case where the first filling portion 14 is formed but the second filling portion 16 is not formed, first, The cloth material 201 is applied, and then the cloth material is fixed so that the distance from the applied material 201 is the above-mentioned distance. The fixing member 17 is arranged, and the second filling portion 16 is formed, but the first filling portion 14 is not formed. In this case, the coating material 202 is first applied, and then the distance from the coating material 202 is increased to the above-mentioned distance. It is preferable to arrange the fixing member 17 so as to provide a distance therebetween.

[0205] The coating materials 201 and 202 are applied in a width direction DR1 of the core 11 so as to extend beyond the width of the effective area. By applying the application materials 201 and 202 in this manner, the first The coating material 201 to 205 is present over the entire width of the effective area of ​​the filling portion and the second filling portion. This results in a step-like shape caused by the beginning end of the sheet 12 across the entire width of the effective area. The difference in height between the coating material 201 and the fixing member 17 can be reduced. In order to prevent the coating materials 201 and 202 from protruding from the winding core 12 when the sheet 12 is wound, In the width direction DR1 of the sheet 11, 1 mm or more is provided inward from both ends of the sheet 12 in the short direction. It is preferable that the coating is applied at a distance of at least 10 mm, or at least 30 mm.

[0206] The coating material 201 has a width of 5 mm or more, 10 mm or more, or 30 mm or more. It is preferable that the coating material 201 is applied in such a manner as described above. As a result, the step caused by the winding start end 12A of the sheet 12 can be more effectively alleviated. The upper limit of the width of the coating material 201 is set to the width of the core 11 from the viewpoint of suppressing overlapping of the coating material. It is preferably less than the perimeter.

[0207] The coating material 202 has a width of 0.5 mm or more, 1 mm or more, or 5 mm or more. It is preferable that the coating material 202 is applied in such a manner as described above. This makes it possible to more effectively reduce the step caused by the fixing member 17. The upper limit of the width of 2 is less than the outer circumferential length of the core 11 in order to suppress overlapping of the coating material. is preferred.

[0208] The thickness of the coating material 201 is the height of the upper surface 12A2 of the winding start end 12A. It is preferable that the coating material 201 is applied in such a manner as described above. Since a sufficient amount of coating material 201 is applied, the winding start end 12A of the sheet 12 The specific thickness of the coating material 201 is as follows: For example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, It is preferable that the thickness of the sheet 12 is 3 μm or more and less than 50 μm. In some cases, it is preferable that the thickness is 50.5 μm or more and 2000 μm or less. The thickness of the fabric material 201 is the thickness before the sheet 12 is wrapped around it.

[0209] The coating material 202 is applied so that the thickness of the coating material 202 is equal to or greater than the height of the surface of the fixing member 17. By applying the coating material 202 in this manner, it is possible to obtain a sufficient amount of Since a large amount of the coating material 202 is applied, the step caused by the fixing member 17 can be more effectively reduced. Specifically, the lower limit of the thickness of the coating material 202 is set to 3 μm when the thickness of the fixing member 17 is 3 μm. In the case where the thickness is from 3 μm to 10 μm, the thickness is preferably from 3 μm to 12 μm. The thickness of the coating material 202 is the thickness before the sheet 12 is rolled.

[0210] After the coating materials 201 and 202 are applied, the sheet 12 is The tip surface 12A1 of the winding start end 12A comes into contact with the coating material 201, and the sheet 12 is The winding start end 12A is placed so as to cover the material 202. The winding start end 12A of the sheet 12 is attached to the sheet 12, and the winding start end 12A is fixed to the sheet 12 via the fixing member 17. is fixed to the outer peripheral surface 11A of the winding core 11.

[0211] After the winding start end 12A of the sheet 12 is fixed to the winding core 11, as shown in FIG. The sheet 12 is wound around the outer peripheral surface 11A of the core 11. Since the coating materials 201 and 202 flow and spread, the coating material 201 fills the first gap 13. At the same time, the second gap 15 is filled with the coating material 202, and the first gap 13 is filled with the coating material 203. The first filling portion 14 and the second gap 15 are filled to form a second filling portion 16. The roll body 10 is obtained. The coating material 201 is reliably spread in the first gap 13, etc. In order to fill the gap, if the sheet 12 exceeds 1000 m, the sheet 12 is extended to 1000 m or more. If the sheet 12 is less than 1000m long, the entire length of the sheet 12 may be wound. preferable.

[0212] In addition, when the coating materials 201 and 202 are curable polymer compositions, at least 2 After the sheet 12 is wound, the curable polymer composition is cured. In the case of a one-component curable polymer composition (a moisture-curable polymer composition), the composition is It reacts with the humidity in the air and hardens when left at room temperature, so no heating or ionizing radiation equipment is required. The curable polymer composition can be cured without using any special equipment such as a two-liquid In the case of a curable polymer composition, the base material and the curing agent are mixed together to cause curing. This can be done.

[0213] The roll body 20 can be manufactured, for example, by the following method. A fixing member 17 is disposed on the outer peripheral surface 11A of the winding core 11 along the width direction DR1.

[0214] After the fixing member 17 is placed, the fixing member 17 is applied with a dispenser, a syringe, or other such application device as shown in FIG. As shown in (A), the coating is applied to the outer peripheral surface 11A of the core 11 along the width direction DR1 of the core 11. Materials 203 to 205 are applied. The applied material 204 contacts the first end surface 17A of the fixing member 17. The coating material 205 is applied so as to come into contact with the second end surface 17B of the fixing member 17. The coating material 203 is applied to the second end surface 17B of the fixing member 17 and the coating material 20 The coating material 203 is applied to a portion separated from the roll start end 15 of the sheet 12. The coating material 204 is applied to the first end surface 12A1 of the fixing member 17. The coating material 205 is applied to the second end surface 17A of the fixing member 17. 7B. Also, the fixing member 17 may be applied to the outer peripheral surface 11A of the core 11. After placing the materials 203 to 205, the materials 203 to 205 are applied. After application, the coating material 204 is placed in contact with or in close proximity to the first end surface 17A of the fixing member 17. and the coating material 205 is in contact with or in close proximity to the second end surface 17B of the fixing member 17. A fixing member 17 may be provided.

[0215] After the application of the application materials 203 to 205, as shown in FIG. 19(B), The tip surface 12A1 of the winding start end 12A comes into contact with the coating material 203, and the sheet 12 is The winding start end 12A is positioned so as to cover the materials 204 and 205, respectively. The winding start end 12A of the sheet 12 is attached to the fixing member 17, and the sheet 12 is wound via the fixing member 17. The winding start end 12A is fixed to the outer peripheral surface 11A of the winding core 11.

[0216] After the winding start end 12A of the sheet 12 is fixed to the winding core 11, as shown in FIG. The sheet 12 is wound around the outer peripheral surface 11A of the core 11. Since the coating materials 203 to 205 flow and spread, the coating material 203 fills the first gap 13. The second gap 15 is filled with the coating material 204, and the third gap 21 is filled with the coating material 205. The first gap 13 is filled with a first filling portion 14, and the second gap 15 is filled with a second filling portion 15. The third filling portion 22 is filled in the third gap 21. The roll body 20 is obtained. The coating material 203 is reliably spread in the first gap 13 and the like to fill the gap. Therefore, if the sheet 12 exceeds 1000 m, the sheet 12 should be wound up to 1000 m or more. Also, if the sheet 12 is less than 1000 m long, it is preferable to roll the entire length of the sheet 12. It is nice.

[0217] In any of the above manufacturing methods, the coating materials 201 to 205 are rolled up on the sheet 12. However, the coating material 201 may be flowed before the sheet 12 is wound. However, if the coating material 201 etc. is made to flow before the sheet 12 is wound, the number of steps increases. It is preferable to make the coating materials 201 to 205 flow by rolling the sheet 12.

[0218] In the above manufacturing method, the coating materials 201 to 205 are applied using a dispenser, a syringe, or the like. The coating is done using a coating device, but a mold with a slit is used together with the coating device to apply the coating material. The materials 201 to 205 may be applied using a mold having a slit. By applying the coating material 201 to 205, partial variations in thickness, width, etc. The material of the mold is not particularly limited, but may be, for example, a resin or a metal. etc.

[0219] Specifically, first, as shown in FIG. 20(A), a mold 210 having a slit 210A is prepared. This mold 210 is used for applying the application material 201. The length, width, and depth of the slit 210A are the same as the length, width, and thickness of the coating material 201, respectively. Therefore, the description will be omitted here.

[0220] After preparing the mold 210, as shown in FIG. 20(B), the mold 210 is wound along the width direction DR1 of the core 11. The die 210 is disposed on the outer peripheral surface 11A of the winding core 11. When viewed from directly above the die 210, The inner surface of the slit on the fixing member 17 side in the width direction overlaps with the second end surface 17B of the fixing member 17. The electrodes are arranged so as to be adjacent to or in close proximity to each other.

[0221] After the mold 210 is placed on the outer peripheral surface 11A of the core 11, the mold 210 is applied with a dispenser, a syringe, or the like. Using the device, the coating material 201 is provided in the slit 210A as shown in FIG. 20(B). The coating device may be a dispenser or a syringe, but may also be a spray or a die coater. Thereafter, if necessary, the surface of the mold 210 may be removed with a doctor blade or the like. The excess coating material 201 is then scraped off. Then, the mold 210 is removed, and the roll is A coating material 201 can be placed on the outer peripheral surface 11A of the core 11. The coating materials 202 to 205 are also sprayed in the same manner as described above for the roller bodies 10 and 20. It can be placed using a mold 210 having lits 210A.

[0222] Instead of applying the coating materials 201 to 205, a filling tape is applied to the outer peripheral surface 11A of the core 11. Specifically, first, as shown in FIG. 21(A), a de A coating material 201 is applied in a tape shape using a coating device such as a dispenser or syringe, and the substrate is 221 and a filler tape 222 of the coating material 201 are formed. In this example, the filling tape 222 is formed from the coating material 201. If the sheet is made of a material that spreads under the pressure of rolling, the coating material 201 is not required. Good too.

[0223] The material of the base material 221 is not particularly limited, but may be, for example, polyethylene terephthalate. polyester resins such as cellulose acetate, cellulose resins such as triacetyl cellulose, acrylic Also, a known release film may be used as the base material 221. When applying the coating material 201 to the surface of the substrate 221, alignment lines are formed on the substrate 221 in advance. The alignment line 221A is drawn, and the coating material 201 is applied along the alignment line 221A. By drawing such a positioning line 221A on the base material 221 in advance, The positional deviation of the fabric material 201 can be suppressed. When applying the coating agent 01, the coating device is fixed and the base material 221 is fixedly wound using the unwinding device. By unwinding the substrate 221 at a constant speed, uneven coating can be suppressed. can.

[0224] After forming the laminate 220, the filling tape 222 is wound around the core as shown in FIG. 21(B). The laminate 220 is attached to the outer peripheral surface 11A of the core 11 so as to contact the outer peripheral surface 11A of the core 11. The filling tape 222 is arranged so as to contact the second end surface 17B of the fixing member 17. Then, the base material 221 is peeled off. This allows the filling tape 222 to be disposed on the outer circumferential surface 11A of the winding core 11. The subsequent steps are similar to those described above for the roll bodies 10 and 20.

[0225] In the above, a laminate having one substrate and a filling tape is formed, but two substrates, A laminate having a filling tape and a thickness adjusting member may be formed. As shown in (A), a coating device such as a dispenser or syringe is used to apply the coating liquid to the surface of a first substrate 231. Thus, the coating material 201 is applied.

[0226] Then, as shown in FIG. 22(B), the coating material 201 and the desired coating material 201 are The coating material 20 is sandwiched between the thickness adjusting member 232 having a desired thickness to obtain a desired thickness. A second base material 233 is placed on top of the first base material 231 to form a laminate 230. Examples of the material include spacers and particles. The peel strength of 33 is smaller than the peel strength of the first substrate 231 to the coating material 201. By satisfying such a relationship, the second base material 233 can be easily peeled off. The peel strength of the second substrate 233 was measured using a tensile tester (product name: "Single Column Type Material Tester" The measurement is performed using the following test method using the "STA-1150" tester (manufactured by A&D Co., Ltd.) When measuring the peel strength, first, the sample is placed on a glass plate measuring 30 cm long and 2.5 cm wide. On the other hand, the laminate 230 is vertically aligned. The substrate was cut to a size of 200 mm x 25 mm in width, and the first substrate 231 side was attached to a double-sided tape on a glass plate. The sample is then attached to a glass plate and held in a pair of fixtures of a tensile tester. The laminate 230 is held in a pair of jigs of a tensile tester. When the laminate 230 is to be bonded to the second substrate 233, the second substrate 233 is first peeled off slightly from the laminate 230 by hand. The second substrate 233 is held by one jig, and the glass plate and the laminate 2 are held by the other jig. In this state, the peeling speed was 300 mm / min, the peeling distance was 50 mm, The second substrate 233 is peeled off at a peeling angle of 180°. The peel strength with the substrate 233 is measured. The peel strength is the arithmetic mean value of three measurements. The peel strength of the first base material 231 is measured in the same manner as the peel strength of the second base material 233. The first base material 231 and the second base material 233 are the same as the base material 221. It is possible.

[0227] After forming the laminate 230, a predetermined pressure is applied to the laminate 230. The thickness of the material 201 becomes the desired thickness. Then, the laminate 230 is cut out in the shape of a tape. This forms a laminate 230 having a filled tape 234 of the coating material 201 .

[0228] Thereafter, the second base material 233 is peeled off as shown in FIG. Then, as shown in FIG. 22(D), the filling tape 234 comes into contact with the outer peripheral surface 11A of the core 11. The laminate 230 is attached or adhered to the outer peripheral surface 11A of the core 11 so that the filling tape 230 is filled in the outer peripheral surface 11A of the core 11. The loop 234 is arranged so as to contact or be close to the second end surface 17B of the fixing member 17. Then, the first base material 231 is peeled off. A filling tape 234 can be placed on the outer peripheral surface 11A of the roll 1. The process is the same as that described above for the bodies 10 and 20. Instead of the coating materials 202 to 205, a filling tape is used. The tape can be placed on the outer peripheral surface 11A of the winding core 11 in the same manner as the filling tape 234.

[0229] A mold may also be used to form and transfer the filling tape. By transferring the tape, the filling tape can be easily installed at the same time as the fixing member 17. Specifically, first, a mold 241 is prepared as shown in FIG. The mold 241 has a hole 241A. The side surface of the mold 241 in the longitudinal direction is easily removed from the mold 241. Preferably, the mold 241 is open so that the filler tape described below can be removed. The mold 241 is, for example, U-shaped. The mold 241 is not particularly limited, but may be made of, for example, resin or metal. The length, width and depth of the opening 241A of the mold 241 can be determined by the filling tape. Since the length, width, and thickness of the tube are similar to those of the tube, the description thereof will be omitted here.

[0230] After preparing the mold 241, as shown in FIG. 23(B), the coating material 201 is applied to the mold 241. 23(C), the filling tape 242 is formed. The die 241 is pressed against the outer circumferential surface 11A of the core 11 so that the tape 242 comes into contact with the outer circumferential surface 11A of the core 11. When the coating material 201 is a material that becomes sticky when wet, It is preferable to wet the surface of the filling tape 242 with water to make it viscous. By making the surface of the film 2 viscous, it is attached or adhered to the outer peripheral surface 11A of the core 11. It is possible.

[0231] Thereafter, the mold 241 is removed from the filling tape 242. As a result, the outer peripheral surface 11A of the winding core 11 The filling tape 242 can be placed on the roll bodies 10 and 20. The process is the same as that described above. Instead of the coating materials 202 to 205, a filling tape is used as filling tape 2. It can be placed on the outer peripheral surface 11A of the core 11 in the same manner as in 42.

[0232] The filling tape may be transferred to the outer peripheral surface 11A of the core 11 using offset printing. Time management is achieved by forming and transferring the filling tape using set printing. This makes it easy to install the filling tape at a set time with good positional accuracy. As shown in FIG. 24A, the outer peripheral surface of an intermediate transfer body 251 (for example, an intermediate transfer roll) A coating material 201 is applied to the filled tape by a coating device such as a dispenser or a syringe. 24B, the outer peripheral surface of the intermediate transfer body 251 is The filling tape 252 formed in the above manner is transferred to the outer peripheral surface 11A of the core 11 by offset printing. This allows the filling tape 252 to be placed on the outer peripheral surface 11A of the core 11. The subsequent steps are the same as those for the rolls 10 and 20. 205, the filling tape is applied to the outer peripheral surface 11 of the core 11 in the same manner as the filling tape 252. It can be placed in A.

[0233] According to this embodiment, the first gap 13 is filled with the first filling portion 14. The first turn of the sheet 12 on the portion 14 is gently rolled from the separation position P1 toward the tip surface 12A1. As a result, the sheet 12 can be lifted up smoothly due to the roll-start end 12A of the sheet 12. The difference in level can be reduced.

[0234] According to this embodiment, the second gap 15 is filled with the second filling portion 16. The first turn of the sheet 12 on the portion 16 is gently moved from the first end surface 17A toward the arrival position P2. This can effectively reduce the step caused by the fixing member 17. do.

[0235] In the roll body 20, the third gap 21 is filled with the third filling portion 22. The portion of the first round of the sheet 12 on the filling portion 22 can be lifted up smoothly. This makes it possible to more effectively reduce the step caused by the fixing member 17.

[0236] If the sheet becomes deformed, there will be parts of the sheet that cannot be used as a product. Therefore, in order to secure the effective length, the effective length of the sheet is compensated. However, if the part that does not become a product becomes longer due to deformation, sheet loss increases. According to this embodiment, the step caused by the winding start end 12A of the sheet 12 and the fixing member 17, Since the step caused by the step 51 can be reduced, deformation of the sheet 12 can be suppressed. This reduces sheet loss.

[0237] [Second embodiment] A roll body according to a second embodiment of the present invention will now be described with reference to the drawings. FIG. 25 is a perspective view of the roll body according to this embodiment, and FIG. 26 is a perspective view of one of the roll bodies of FIG. FIG. 27 is an enlarged view of a portion of the roll body shown in FIG. 25 for explaining the dimensions of each component of the roll body shown in FIG. FIG. 28 is a diagram showing the maximum thickness and length of the second intermediate portion shown in FIG. 25. 29 is a diagram showing the cross-sectional area S3. 38 and 39 are enlarged views of a portion of the other roll body according to this embodiment. 3A to 3C are diagrams illustrating a manufacturing process of a roll body.

[0238] <<<Roll body>>> The roll body 70 shown in FIG. 25 includes a core 11 and a sheet wound around the outer peripheral surface 11A of the core 11. The roll body 70 includes a long sheet 12. As shown in FIG. The first intermediate portion 71 and the second intermediate portion 72 provided between the following sheets 12, and the sheet 12 The sheet 12 further includes a fixing member 17 for fixing a portion of the sheet 12 to the winding core 11. The roll body 70 is wound around the core 11 multiple times, for example, two or more times. The roll body 70 has a first gap 13 and Since the second gap 15 is hollow, the first gap 13 is filled with the first filling portion 14. Furthermore, the second gap 15 is not filled with the second filling portion 16 .

[0239] <<First intervening part>> The first intermediate portion 71 is provided between the sheets 12 in the first and subsequent turns. The intermediate portion 71 is located below the first intermediate portion 71 (on the winding core 11 side) and is The lower sheet 12 in contact with the first intermediate portion 71 and the second intermediate portion 72 are located above the first intermediate portion 71. The first intermediate portion 71 is sandwiched by the upper sheet 12 that is in contact with the upper sheet 12. The sheet 12 is always present above the first intermediate portion 71. Specifically, the first intermediate portion 71 is provided between the sheets 12 in the first or subsequent turns. The first gap 13 is provided at least in the first region 12D corresponding to the first gap 13. The recess 71 extends in the width direction DR1 of the core 11.

[0240] A separation position P at which the upper sheet 12 is separated from the lower sheet 12 in the first intermediate portion 71 The edge thickness T4 (see FIG. 27) of the end portion 71A on the side 3 (see FIG. 26) is thick. Since there is a risk of new steps being formed due to this thickness, it is preferable that the thickness is thin. In practice, the edge thickness T4 is preferably 50 μm or less. 4. In order to shorten the deformation relaxation length, it is preferable that the length is 10 μm or less, and further 2 μm or less. More preferred.

[0241] In addition, in the case where the sheet 12 is a thin film having a thickness of 3 μm or more and less than 50 μm, In this case, the wire is more susceptible to the effect of the step caused by the winding start end 12A than when the wire is thick. When such a thin film is used, the edge thickness T4 is preferably 10 μm or less. In order to minimize the deformation relaxation length, it is preferable that the thickness is 5 μm or less, and more preferably 1 μm or less. preferable.

[0242] The edge thickness T4 was measured using a scanning optical interference surface profiler (product name: New View The thickness is measured in the same manner as the edge thickness T1 using a Zygo 7300. It is also possible to measure as follows. First, the end 71A and the end The portion including the lower sheet 12 and the upper sheet 12 that contact the portion 71A is cut out with a blade. A cross section of this part is obtained by cutting or polishing, and the cross section is examined using a stereo microscope (for example, a microscope with the product name "Digital Microscope"). Observation will be performed using an "Icroscope VHX-7000" (manufactured by Keyence Corporation). do.

[0243] As shown in FIG. 26 and FIG. 27, the first intermediate portion 71 corresponds to the first gap 13. The first portion 71B is disposed in the first region 12D, and the sheet 1 is disposed above the first portion 71B. The second portion 71 is located on the side of the arrival position P4 (see FIG. 26) where the second portion 71 reaches the lower sheet 12. The first intermediate portion 71 has not only the first portion 71B but also the second portion 71C. This prevents stress from concentrating on the step caused by the winding start end 12A. Therefore, the deformation of the upper sheet 12 and the subsequent sheets 12 can be suppressed. This difference in level can be alleviated.

[0244] The thickness T5 of the second portion 71C (see FIG. 27) is preferably 2 μm or more and 300 μm or less. If the thickness T5 of the second portion 71C is within this range, adverse effects on the winding of the sheet 12 are suppressed. The deformation relaxation length can be shortened while avoiding the above. If the length exceeds 300 μm, the deformation relaxation length can be shortened. This may adversely affect winding.

[0245] The thickness T5 of the second portion 71C is the maximum thickness of the second portion 71C. The T5 is a scanning optical interference surface profile measuring instrument (product name "New View7300", Zy The thickness can be measured in the same manner as the edge thickness T1 using a quartz crystal (manufactured by GO Co., Ltd.). can be measured as follows. First, the lower sheet 12, the second portion 71 C and the portion including the upper sheet 12 are taken and fixed so as not to be crushed. Then, the cross section of this fixed portion is polished, and the thickness T5 of the second portion 71C is measured using a stereomicroscope ( For example, the product name is "Digital Microscope VHX-7000" manufactured by Keyence Corporation. ) is measured.

[0246] If the thickness of the first intermediate portion changes suddenly, deformation will remain due to this thickness change. As a result, the step caused by the winding start end may not be fully alleviated. It is preferable to ensure that the length of the first intermediate portion is sufficient for the thickness of the sheet. If increasing the length of the intermediate portion would have other effects such as winding, the first intermediate portion may be chosen. By making the length of the first interposition portion shorter than the optimal length, the length of the first interposition portion is improved. Although the deformation relaxation length is increased, the deformation relaxation length is shorter than if the first intermediate portion is not provided. Therefore, the winding start end 12A of the winding core 11 is wound on the upper surface 12A of the winding start end 12A. A2 of the first intermediate portion 71 with respect to the tip surface 12A1 of the first intermediate portion 71 with respect to the distance D2 (see FIG. 27) The ratio of the length L3 from the corresponding position to the end on the side of the separated position P3 (length L3 / distance D2) is 1 or more. In order to shorten the deformation relaxation length, this ratio is preferably 5 or more, and more preferably It is preferable that it is 50 or more.

[0247] The length L3 can be measured as follows. First, the lower sheet 12 and The upper sheet 12 is left unwound, and the other sheets 12 are unwound. If the first intermediate portion 71 is transparent or semi-transparent, the area where the first intermediate portion 71 is present can be visually recognized. From the tip surface 12A1 of the starting end 12A to the end of the first intermediate portion 71 on the side of the separated position P3 The distance is measured at 10 points in the width direction of the sheet 12 by observing the sheet 12 through a ruler or a tape measure. On the other hand, when the sheet 12 cannot be observed through the lens, In this case, first, the part including the lower sheet 12, the first intermediate portion 71, and the upper sheet 12 This part is taken so that it is not crushed. Then, this part is fixed and polished to obtain a cross section. The distance from the position corresponding to the tip surface 12A1 of the first intermediate portion to the end on the separated position side is calculated. Separate the stereo microscope (for example, product name "Digital Microscope VHX-7000", stock The measurements are taken using a meter (manufactured by Keyence Corporation).

[0248] The longer the length L3, the better. For example, when the thickness of the sheet 12 is 50 μm or more and 200 μm or less, In the case where the deformation relaxation length is less than 110 μm, the length L3 is preferably 110 μm or more. In order to shorten the length, it is preferable that the length is 1 mm or more, and more preferably 10 mm or more.

[0249] The physical properties such as tensile strength of the constituent material of the first intermediate portion 71 are similar to those of the constituent material of the first filling portion 14. The physical properties such as tensile strength of the first intermediate portion 71 are the same as those of the first filling portion 72. The material is the same as that of part 14, so the explanation will be omitted here.

[0250] <<Second intervening part>> The second intermediate portion 72 is provided between the sheets 12 in the first and subsequent turns. The sheet 12 is always present on the intermediate portion 72. Also, the second intermediate portion 72 is formed on the first or subsequent turns of the sheet 12. Specifically, the second intermediate portion 72 is provided between the first and second sheets 12. 2, at least in a second region 12E corresponding to the second gap 15. The second intermediate portion 72 extends in the width direction DR 1 of the winding core 11 .

[0251] The second intermediate portion 72 is disposed between the same sheets 12 as the first intermediate portion 71 (for example, between the second round sheets 12 and the third turn of the sheet 12), the second intermediate portion 72 is provided between the first intermediate portion 71 The second sheet 12 may be provided between different sheets 12.

[0252] The maximum thickness T6 of the second intermediate portion 72 (see FIGS. 27 and 28) is 0.01 mm or more. It is preferable that the maximum thickness T6 of the second intermediate portion 72 is 0.01 mm or more. The maximum thickness T6 can effectively reduce the step caused by the step 7. From the viewpoint of mitigating the above, the thickness is set to 0.02 mm or more, 0.03 mm or more, or 0.04 mm or more. On the other hand, if the maximum thickness T6 is too thick, the winding start end 12A may be damaged. However, this can adversely affect the winding of the sheet 12. For this reason, the upper limit of the maximum thickness T6 is preferably 0.2 mm or less or 0.1 mm or less. I wish.

[0253] The maximum thickness T6 was measured in the same manner as for thickness T2 using a laser displacement meter and a stereo microscope. When measuring the maximum thickness T6 with a laser displacement meter, first, As in the measurement of T2, etc., the roll body 70 was attached to a jig and three laser displacement After the meter is placed in a predetermined position, the sheet 1 is rolled until the second intermediate portion 72 is exposed from the roll body 70. After that, with the second intermediate portion 72 exposed, the core 11 is rotated at a speed of 30 mm. The laser displacement meter was used to measure the change in the rotation speed at 1 / s and the sampling period was 200 μs. The position is measured and a graph is obtained with the horizontal axis representing the position (mm) and the vertical axis representing the amount of displacement (mm). This measurement was performed on the second end 72A of the second intermediate portion 72 on the side opposite to the first end 72A on the fixing member 17 side. 2B toward the first tip 72A. In this measurement, the reference height (displacement amount 0 mm line) The difference between the reference height and the height of the second intermediate portion 72 is the height of the second intermediate portion 72. The difference between the displacement amount at the 0 mm line and the position where the displacement amount is the highest is By calculating the thickness T6 of the second intermediate portion 72, the maximum thickness T6 of the second intermediate portion 72 is calculated. In general, the graph represents a plane including the longitudinal direction of the sheet and the radial direction of the core. In the figure, one division on the horizontal axis is 5 mm, and one division on the vertical axis is 0.02 mm. In this case, the first tip 72 A is located directly above the fixing member 17 .

[0254] The measurement of the maximum thickness T6 using a stereomicroscope can be performed as follows. The lower sheet 12, the second intermediate portion 72, and the upper sheet 12 are arranged so as not to be crushed. The section of the fixed part is then polished and a second intermediate layer is formed. The maximum thickness T6 of part 72 is measured using a stereo microscope (for example, product name "Digital Microscope VHX -7000" manufactured by Keyence Corporation.

[0255] When the thickness of the second intermediate portion 72 is measured along the longitudinal direction DR2 of the sheet 12, The second intermediate portion 72 is located in the longitudinal direction DR2 relative to the maximum thickness T6 (see FIGS. 27 and 28). The length from the second tip 72B of the second intermediate portion 72 to the position where the second intermediate portion 72 has the maximum thickness T6 It is preferable that the ratio of the length L4 (see FIG. 27) (length L4 / maximum thickness T6) is 12 or more. If this ratio is 12 or more, deformation remains in the vicinity of the second tip 72B of the second intermediate portion 72. If the thickness of the second intermediate portion is too thick, the wire may deviate from its perfect circle during winding. However, if this ratio is 12 or more, the second intermediate portion 72 is thick and the winding property may be deteriorated. Since the thickness of the second intermediate portion is not too large, it is possible to prevent the winding property from being deteriorated. If the ratio is too large, new deformation may occur due to the second intermediate portion. If the ratio is less than 1, the occurrence of such a new deformation can be suppressed. From the viewpoint of shortening the relaxation length, 25 or more, 50 or more, 75 or more, 100 or more, 125 or more, It is preferable that the number of the fixing members is 150 or more, 175 or more, or 200 or more. From the viewpoint of effectively reducing the step, it is preferable that the maximum thickness T6 of the second intermediate portion 72 is large. The upper limit of this ratio can be, for example, 2000 or less, 1000 or less, 500 or less, or 375 It is preferable that:

[0256] From the viewpoint of reducing the step, the longer the length L4, the better. For example, When the thickness is 50 μm or more and 200 μm or less, the length L4 must be 5.0 mm or more. Preferably, in order to further shorten the deformation relaxation length, it is set to 7.0 mm or more, and further set to 9.0 mm or more. However, if the length L4 is too long, the second intermediate portion In the region R3 (see FIG. 28) from the second tip 72B to the position where the thickness becomes maximum T6, It becomes difficult to form the second intermediate portion with a convex surface, and wavy thickness unevenness occurs in the second intermediate portion. Therefore, the upper limit of the length L4 is set to the surface 72 of the second intermediate portion 72 in the region R3. C is likely to become convex, and from the viewpoint of suppressing wavy thickness unevenness, it is 20 mm or less. is preferred.

[0257] The length L4 can be obtained from the graph of the position displacement curve in the same manner as the maximum thickness T6. Specifically, first, when the second tip 72B of the second intermediate portion 72 exists, the amount of displacement increases. From the graph of the position displacement curve, the displacement amount 0 mm line and the position The first position is the intersection of the displacement curves. Then, the position where the displacement is the highest is found. Draw an imaginary line perpendicular to the 0 mm displacement line. Then, draw an imaginary line perpendicular to the 0 mm displacement line. The intersection point of the in is set as the second position, and the length L4 is calculated by calculating the distance between the first position and the second position. can be sought.

[0258] The above-mentioned length L4 / maximum thickness T6 can roughly represent the shape of the second intermediate portion 72. In order to more accurately express the convex shape of the surface 72C, the cross-sectional area of ​​the second intermediate portion 72 is further used. Specifically, the length of the sheet 12 with respect to the maximum thickness T6 of the second intermediate portion 72 is preferably In a plane including the hand direction DR2 and the radial direction DR3 of the winding core 11 (the plane shown in FIG. 28), The cross-sectional area S3 (FIG. 28) of the second intermediate portion 72 is from the second tip 72B to the position where the maximum thickness T6 is reached. It is preferable that the ratio of the cross-sectional area S3 to the maximum thickness T6 is 2.5 or more. If is 2.5 or more, the cross-sectional area S3 of the second intermediate portion 72 is large with respect to the maximum thickness T6. In this way, the second intermediate portion 72 can effectively lift the seat 12, thereby making it possible to more effectively lift the seat 12 by the step. The lower limit of the cross-sectional area S3 / maximum thickness T6 can be further reduced. From the perspective of Preferably, the cross-sectional area S3 / maximum thickness is 6.5 or more, or 7.0 or more. The upper limit of T6 is not particularly limited, but may be, for example, 20.0 or less, 17.5 or less, 15.0 or less. The cross-sectional area S3 of the second intermediate portion 72 may be less than 12.5, or less than 10.0. The cross-sectional area of ​​the region R3 (the area of ​​the region surrounded by the solid line in FIG. 29) of the second intermediate portion 72 The area of ​​each measurement in the region from the first position to the second position on the position-displacement curve graph. The thickness can be calculated by multiplying the thickness at each point by the width between each measurement point and then adding up the results. Cut.

[0259] The physical properties of the material constituting the second intermediate portion 72, such as tensile strength, are similar to those of the material constituting the second filling portion 16. The physical properties such as tensile strength of the second intermediate portion 72 are the same as those of the second filling portion 72. Since the material is the same as that of part 16, the explanation will be omitted here.

[0260] As described later, the sheet 1 on the outer side of the first intermediate portion 71 and the second intermediate portion 72 in the radial direction DR3 In the upper sheet 12 (upper sheet 12), there is a step or a gap caused by the roll start end 12A of the sheet 12. Although the step caused by the fixing member 17 can be suppressed, the diameter of the fixing member 17 is larger than that of the first intermediate portion 71 and the second intermediate portion 72. In the sheet 12 (lower sheet 12) on the inner side (core 11 side) in the direction DR3, 12 and the step caused by the fixing member 17. For this reason, the first intermediate portion 71 and the second intermediate portion 72 are arranged as close to the inside as possible in the radial direction DR3 (for example, , between the first sheet 12 and the second sheet 12, or between the second sheet 12 and the third sheet It is preferable that the sensor is provided between the sensor 1 and the sensor 12.

[0261] <<Other roll bodies>> The roll body 70 is wound by a tip surface 12A1 of the winding start end 12A of the sheet 12 and a fixing member 17. The second end surface 17B is a cross-sectional view taken along the longitudinal direction DR2 of the sheet 12 and the radial direction DR3 of the core 11. The sheet 12 may be wound in a roll 80 as shown in FIG. The tip surface 12A1 of the starting end 12A protrudes beyond the second end surface 17B of the fixing member 17. In this case, the second intermediate portion 72 is interposed in the second region 12E between the sheets 12. In addition, the third gap 21 between the sheets 12 on the second end surface 17B side corresponds to the third gap 21. A third intermediate portion 81 may also be present in the third region 12F.

[0262] <Third intervening part> The third intermediate portion 81 is disposed in the third region 12F corresponding to the third gap 21. 2 is similar to the intermediate portion 72, so the description thereof will be omitted here.

[0263] The roll body 70 has a second intermediate portion 72 provided in a second region 12E between the sheets 12. However, from the viewpoint of reducing the step caused by the winding start end 12A of the sheet 12, It is sufficient that the first intermediate portion 71 is provided in the first region 12D between the first and second electrodes 12. As shown in the roll body 90, the second intermediate portion 72 is provided in the second region 12E between the sheets 12. The roll body 90 shown in FIG. The sheets 12 are in close contact with each other.

[0264] The roll body 70 has a first intermediate portion 71 provided in a first region 12D between the sheets 12. However, from the viewpoint of reducing the step caused by the fixing member 17, the second Since it is sufficient that the second intermediate portion 72 is provided in the region 12E, the roll body 1 shown in FIG. 00, the first intermediate portion 71 is not provided in the first region 12D between the sheets 12. The roll body 100 shown in FIG. The teacher is close by.

[0265] The roll body 70 includes the first intermediate portion 71, but the roll body 110 shown in FIG. In this way, the first filling portion 14 may be provided instead of the first intermediate portion 71. 3 is filled with a first filling portion 14, and a second region 12E between the sheets 12 is filled with a second intermediate portion 12B. A recess 72 may be provided.

[0266] The second intermediate portion 72 of the roll body 110 is between the second round sheet 12 and the third round sheet 12. However, as in the case of a roll body 120 shown in FIG. 34, the first round of the sheet 12 and the second round A second intermediate portion 72 may be provided between the interstitial sheets 12 .

[0267] The roll body 70 includes the second intermediate portion 72, but the roll body 130 shown in FIG. In this way, the second filling portion 16 may be provided instead of the second intermediate portion 72. A first intermediate portion 71 is provided in the first region 12D between the first and second gaps 15, and a second filling portion 72 is provided in the second gap 15. The filling portion 16 may be filled.

[0268] The roll body 70 includes a fixing member 17 for fixing the sheet 12 to the outer peripheral surface 11A of the core 11. However, the roll body 140 shown in FIG. 36 does not necessarily have to include the fixing member 17. stomach.

[0269] In the roll 70, the thickness of the sheet 12 is uniform. As shown in FIG. 150, the sheet 12 has both ends 12G extending in the longitudinal direction thereof, and the sheet 12 has both ends 12G extending in the radial direction of the core 11. A protrusion 12H protruding outward from the DR3 may be formed. When the viscosity of the coating material, the first intermediate portion 71, the second intermediate portion 72, or the third intermediate portion 81 is low If the thickness of the sheets is uniform, the filling material (e.g., coating material) will flow between the sheets. There is a risk of the filling material protruding and being present in unintended places. By forming the protrusions 12H on both ends 12G of the sheet 12, the distribution of the filling material can be improved. After placement, for example, after application of the coating material, the filling material (e.g., the coating material, etc.) at both ends 12G is In addition, both ends 12G of the sheet 12 are cut off to form a product. Since these are not used for the purpose of the sheet, the sheet does not have such convex portions 12H at both ends 12G. There is no problem with the product. The convex part 12H is formed by knurling and coating. Alternatively, a tape (for example, a side tape) may be attached to form the coating. In the case of the filling, the same material as that of the first filling portion 14 can be used.

[0270] In the roll body 150 shown in FIG. 37, all of the portions of both end portions 12G of the sheet 12 However, the protrusion 12H may be provided partially. For example, The protruding portions 12H are first intermediate portions at both ends 12G extending along the longitudinal direction of the sheet 12. 71, the second intermediate portion at both ends 12G extending along the longitudinal direction of the sheet 12 72 and / or at both ends 12G extending along the longitudinal direction of the sheet 12. The protrusion 12H may be provided partially at a position sandwiching the third intermediate portion 81. When the first intermediate portion 71 is sandwiched between the first intermediate portion 71 and the second intermediate portion 72, the filling material (for example, the coating material) and the first intermediate portion 71 are sandwiched between the first intermediate portion 71 and the second intermediate portion 72. The protrusion of 71 can be suppressed, and the protrusion 12H is located at a position where the second intermediate portion 72 is sandwiched therebetween. In this case, the filling material (for example, the coating material) and the second intermediate portion 72 are prevented from protruding. When the protrusions 12H are located at positions sandwiching the third intermediate portion 81, the filling material This can prevent the third intermediate portion 81 from spilling out (for example, coating material).

[0271] In FIG. 31 to FIG. 36, the distance D2, the length L3, the length L4, the maximum thickness T6, the cross-sectional area S Although not shown in FIG. 3, when the first intermediate portion 71 is present, the distance D2, the length L3, and the length L 3 / The distance D2 is the same as that of the roll body 70, and when the second intermediate portion 72 is present The length L4, the length L4 / the maximum thickness T6, and the cross-sectional area S3 / the maximum thickness T6 are the same as those of the roll body 70. The same is true for

[0272] 33 and 34, the entire surface of the fixing member 17 is wound at the winding start end 12A. Although they are in close contact with each other, similar to the roll body 10 shown in FIG. 8, the winding start end 12A and the fixing member The first filling portion 14 may be inserted between the first filling portion 14 and the second filling portion 17 .

[0273] <<Roll body manufacturing method>> The roll body 70 can be manufactured, for example, by the following method. As shown in FIG. 1A, a fixing portion is provided on the outer peripheral surface 11A of the winding core 11 along the width direction DR1 of the winding core 11. Material 17 is placed.

[0274] After the fixing member 17 is placed, as shown in FIG. 38(B), The fixing member 17 is fixed so that the tip surface 12A1 of the portion 12A is substantially aligned with the second end surface 17B of the fixing member 17. The winding start end 12A of the sheet 12 is fixed to the outer circumferential surface 11A of the winding core 11 via a fixing member 17. do.

[0275] After the winding start end 12A of the sheet 12 is fixed to the outer peripheral surface 11A of the winding core 11, ), the sheet 12 is wound around the outer peripheral surface 11A of the core 11 at least once. As a result, an intermediate roll body 73 having a first gap 13 and a second gap 15 is obtained. do.

[0276] After obtaining the intermediate roll body 73, as shown in FIG. The coating material 2 is applied to the surface 12I of the sheet 12 that constitutes the outer peripheral surface 73A of the intermediate roll body 73 along the The coating material 206 is applied to at least the first area 106 corresponding to the first gap 13. 12D, and the coating material 207 is applied to at least the second region 12E corresponding to the second gap 15. The coating materials 74 and 75 are the same as the coating materials 201 and 202. The explanation will be omitted here.

[0277] After the coating materials 206 and 207 are applied, the core 11 is sealed as shown in FIG. The sheet 12 is then wound again. This causes the coating materials 206 and 207 to flow and spread, A coating material 206 is provided in the first region 12D between the gates 12 and between the sheets 12. The coating material 207 is provided in the second region 12E of the first intermediate portion 71 and the second intermediate portion 72. The portion 72 is formed. As a result, the roll body 70 is obtained. If at least one of 07 is a hardenable material, after rewinding of the sheet 12 Then, the curable material is allowed to cure.

[0278] In the manufacturing method of the roll body 70, a mold 210 having a slit 210A is used to apply the coating liquid. Although the materials 206 and 207 are not applied, the slit 210A is formed in the same manner as in the first embodiment. The coating materials 206 and 207 may be applied using a mold 210 having a mold. In the same manner as in the embodiment, the first intermediate layer is formed by filling sheets instead of the coating materials 206 and 207. The intermediate portion 71 and the second intermediate portion 72 may be formed.

[0279] According to this embodiment, the first intermediate portion 71 is provided in the first region 12D between the sheets 12. Therefore, the portion of the sheet 12 on the first intermediate portion 71 is gently curved toward the tip surface 12A1. As a result, the sheet 12 can be lifted up smoothly due to the roll-start end 12A of the sheet 12. The step difference can be effectively reduced.

[0280] According to this embodiment, the second intermediate portion 72 is provided in the second region 12E between the sheets 12. Therefore, the portion of the sheet 12 on the second intermediate portion 72 can be lifted up smoothly. This makes it possible to effectively reduce the step caused by the fixing member 17.

[0281] In addition, the step caused by the winding start end 12A of the sheet 12 and the step caused by the fixing member 17 Since the stress can be reduced, deformation of the sheet 12 can be suppressed.

[0282] When the first gap is filled with the first filling part and the second gap is filled with the second filling part, the first filling part The second filling part may flow to the part where pressure is not applied. In this embodiment, the first intermediate portion 71 and the second intermediate portion 72 are provided between the sheets 12. The material constituting the first intermediate portion 71 and the second intermediate portion 72 is less likely to flow and protrude. EXAMPLES

[0283] In order to explain the present invention in detail, the following examples are given. FIG. 40(A) shows a position around the first filling portion of the roll body according to Example 7. FIG. 40(B) is a graph showing the amount of displacement of the first roll body according to Example 8. FIG. 40(C) is a graph showing the amount of displacement with respect to the position around the filling portion, which relates to Example 9. 10 is a graph showing the amount of displacement of the roll body relative to the position around the first packed portion.

[0284] <Preparation of composition for hard coat layer> First, the components were mixed to obtain the composition 1 for hard coat layer as shown below. Ta.

[0285] (Hard Coat Layer Composition 1) Pentaerythritol triacrylate (product name: KAYARAD-PET-30) Nippon Kayaku Co., Ltd.: 60 parts by weight Photopolymerization initiator (1-hydroxycyclohexyl phenyl ketone, product name "Omnira d184'', manufactured by IGM Resins BV): 5 parts by mass Silicone leveling agent (product name: Seikabeam 10-28, Dainichi Seika Chemicals Co., Ltd.) Company, solid content 10%): 0.1 parts by weight Silica particles (product name "SIRMIBK-H84", manufactured by CIK Nanotech Co., Ltd., average Particle size 30nm, solid content 30%): 3 parts by mass Methyl isobutyl ketone (MIBK): 80 parts by weight Cyclohexanone: 20 parts by weight

[0286] <Example 1> First, a fiber-reinforced plastic tube with an inner diameter of 153 mm, an outer diameter of 167 mm and a width of 1600 mm was used. A cylindrical core made of 1380 mm long, 20 mm wide and 100 mm thick is attached to the outer periphery of the core as a fixing member. A rectangular double-sided tape with a thickness of 10 μm was attached to the core in the width direction.

[0287] After the double-sided tape is attached, the core is held by a chucking member of the winding device. Then, the first end surface and the second end surface of the double-sided tape extending along the width direction of the core were fixed to the core. A one-component curable silicone resin composition ( The product name is "Hapio Seal Pro HG" (manufactured by Kampe Hapio Co., Ltd.) and two coats are applied in an environment of 25°C. The silicone resin composition was gray in color. The shear viscosity of the silicone resin composition when applied was 180 Pa·s. Along the width of the core, and the amount of coating per unit width is 1 cm 3 / m, so that each line It was applied in a uniform manner.

[0288] The sheet is then 3000m long, 1340mm wide and 80μm thick. The end of the resin film (in-plane retardation Re: 5 nm) in the longitudinal direction is wound in the width direction of the core. The acrylic resin film was fixed to the outer peripheral surface of the core by applying double-sided tape along the axial direction. The acrylic resin film has a tip surface in the longitudinal direction at the beginning of the winding of the acrylic resin film. The silicone resin composition is in contact with the second end surface of the double-sided tape in the radial direction of the core. They were arranged as follows.

[0289] After that, the entire acrylic resin film is wound onto the core by the winding device, and the core and the first turn are The acrylic resin film is located between the acrylic resin film and at the tip of the winding start end of the acrylic resin film. The first gap in contact with the surface is filled with a silicone resin composition, and the core and the first turn of the acrylic resin are A second gap is disposed between the first end surface of the double-sided tape and a .... The resin composition was filled in the molded body. As a result, a roll body was obtained. The roll body contained silicone. The resin composition is cured and fills the first gap with a length of 20 mm, a width of 1340 mm, and a maximum The first filling part is 300 μm thick, and the second gap is filled with a 20 mm long, 1340 mm wide, and A second filling part having a maximum thickness of 300 μm was formed.

[0290] The shear viscosity of the silicone resin composition was measured using a dynamic viscoelastic analyzer manufactured by Anton Paar Japan Co., Ltd. Specifically, the shear viscosity of the silicone resin composition was measured using a shear viscosity measuring device. Using 25 mm parallel plates, the shear viscosity at 25°C and a shear rate of 1 [1 / s] was measured. The viscosity of the silicone resin composition was determined by measuring the viscosity of the silicone resin. The viscosity of the composition was measured 10 times, and the 8 values ​​excluding the maximum and minimum values ​​were The shear viscosity was calculated by calculating the arithmetic average value of the shear viscosity. The shear viscosity was also measured in the same manner as in Example 1.

[0291] The in-plane retardation Re of the acrylic resin film is measured by a retardation film and optical material inspection device (product The measurements were performed using a 3D printer (manufactured by Otsuka Electronics Co., Ltd.) In order to stabilize the RETS-100 light source, leave it for at least 60 minutes after turning on the light source. Then, select the rotating analyzer method and the θ mode (angle direction phase difference measurement mode). By selecting this θ mode, the stage becomes a tilt rotation stage.

[0292] Next, the following measurement conditions were entered into the RETS-100. (Measurement conditions) Retardation measurement range: Rotating analyzer method Measurement spot diameter: φ5mm Tilt angle range: -40°~40° Measurement wavelength range: 400nm~800nm Average refractive index of sample: 1.5 Thickness: 80μm

[0293] Background data was then obtained without placing a sample in the instrument. This was done every time the light source was turned on.

[0294] Then, a sample was placed on the stage of the device. The size of the sample was 50 mm. ×50mm.

[0295] After placing the sample, it was scanned on the XY plane at a temperature of 23°C and a relative humidity of 50%. The stage was rotated 360° to measure the fast and slow axes. After the measurement, the slow axis was selected. After that, measurements were performed while the stage was tilted within the set angle range around the slow axis. Data (Re) was obtained for the set tilt angle range and set wavelength range in 10° increments. The phase difference Re was measured at five different positions. The measurements were taken at five points in total, the center A1 of the pull and points A2 to A4. The arithmetic mean value of the three points excluding the maximum and minimum values ​​was taken as the in-plane retardation Re.

[0296] <Example 2> In Example 2, a silicone resin composition for forming the first filling portion and the second filling portion is used. Instead of the composition, a two-component curing silicone rubber composition (product name "KE-24", Shin-Etsu Chemical Co., Ltd.) was used. A roll was obtained in the same manner as in Example 1, except that silicone rubber (manufactured by Epson Corporation) was used. The rubber composition is white when mixed, and the shear viscosity of the silicone rubber composition when applied is The pressure was 75 Pa·s.

[0297] <Example 3> In Example 3, the silicone resin composition for forming the first filling portion and the second filling portion is Instead of the composition, a two-part curing silicone rubber composition (product name "ELASTOSIL (registered trademark) The silicone rubber used was "M 4503" (trademark, Wacker Asahi Kasei Silicone Co., Ltd., condensation curing type). Except for the above, a roll was obtained in the same manner as in Example 1. The silicone rubber composition is white in color and has a shear viscosity of 40 Pa·s when applied. Furthermore, this silicone rubber composition does not contain any volatile components or adhesive components. Ta.

[0298] The constituent material of the first filling portion in the roll body according to Example 3 was peeled off perpendicularly to the outer circumferential surface of the core. When a 90° peel test was performed at a peel rate of 10 mm / min, the composition was peeled off with a tensile force of 0.2 N. The material peeled off.

[0299] The above 90° peel test was performed using a sample and a spring tension gauge (manufactured by Ohba Instruments Co., Ltd.). Specifically, a mold larger than the size of the sample was prepared. The mold was then placed on the outer circumferential surface of the core. A two-part curing silicone rubber composition was then applied to the mold. (Product name: ELASTOSIL(R) M 4503, Asahi Kasei Wacker Silicone A condensation curing agent (manufactured by Epson Corporation) was poured into the mold and cured to obtain a material layer. Remove from the mold and cut the material layer into pieces measuring 20mm x 100mm using a cutting machine. A sample was obtained by attaching one end of the sample to a spring tensioner. The specimen was held in place by a tension gauge and the tensile force was measured at a temperature of 25°C and a relative humidity of 50%. Then, the end was lifted up perpendicular to the outer circumferential surface of the core, and the sample was peeled off at a peeling speed of 10 mm / sec. Among the 10 samples that underwent the 90° peel test, the tensile strength was the highest at The arithmetic mean value of the tensile strength of the eight samples excluding the sample with the smallest value and the sample with the smallest value was calculated as the above. The tensile force of the constituent materials was taken as the

[0300] The tensile strength of the material of the first filling portion in the roll body according to Example 3 is 3.5 MPa. The elongation at break was 450% and the tear strength was 12.0N / mm. The hardness of the material of the first filling part measured by meter type A is 28°. The linear shrinkage of the constituent material was 0.10%.

[0301] The tensile strength of the material used in the first filling section is JIS K6251:2017 compliant. Pull and Tensilon universal testing machine (product name "RTC-1310A", A-An Co., Ltd. Specifically, a mold larger than the size of the sample was used. The mold was prepared and placed on the outer peripheral surface of the core. Then, in order to form the first filling portion in the mold, A two-component curing silicone rubber composition (product name: ELASTOSIL (registered trademark) M 45 03" (Asahi Kasei Wacker Silicone Co., Ltd., condensation curing type) is poured in and allowed to harden, The material layer was then removed from the mold and tensile strength was measured using a tensile tester No. 2 manufactured by Kobunshi Keiki Co., Ltd. The dumbbell-shaped punching blade is used to cut the dumbbell-shaped No. 2 size as specified in JIS K6251:2017. The material layer was punched out to obtain a sample. The sample was then left in an environment of 25°C for 24 hours. The sample was then held in the longitudinal direction by a pair of gripping tools of the Tensilon universal testing machine. Both ends were gripped, and the initial gripping distance was 20 mm in an environment with a temperature of 25°C and a relative humidity of 50%. A tensile test was carried out under the conditions of a tensile speed of 100 mm / min, and the tensile strength of the sample was measured. And, the tensile strength of 8 samples excluding the maximum and minimum values ​​of the 10 samples was The arithmetic mean value was taken as the tensile strength of the above constituent material.

[0302] The elongation at break of the material of the first filling section is in accordance with JIS K6251:2017. Sample and Tensilon universal testing machine (product name "RTC-1310A", A-A Corporation The tensile strength was measured using a tensile test piece (manufactured by Andy Ware Co., Ltd.) in the same manner as in the measurement of tensile strength. The arithmetic mean value of the elongation at break of the eight samples excluding the maximum and minimum values ​​was calculated using the above structure. The elongation at break of the composite material was calculated.

[0303] The tear strength of the material used in the first filling section is JIS K6252:2007 compliant. Pull and Tensilon universal testing machine (product name "RTC-1310A", A-An Co., Ltd. The tensile strength was measured using a tensile test piece manufactured by Dow Jones Industrial Average Strength Co., Ltd. in the same manner as in the measurement of tensile strength. The arithmetic average value of the tear strength of the eight samples excluding the maximum and minimum values ​​was calculated. The tear strength of the above constituent materials was measured.

[0304] The hardness of the material used in the first filling section is measured using a durometer type A according to JIS K 6253:1997. Specifically, first of all, the sample size was A large mold was prepared and placed on the outer peripheral surface of the core. Then, the first filling portion was formed in the mold. A two-part curing silicone rubber composition (product name: ELASTOSIL (registered trademark)) for (M 4503, Wacker Asahi Kasei Silicone Co., Ltd., condensation curing type) is poured in, and If necessary, the material layer is cured to obtain the material layer. After that, the material layer is removed from the mold and cut by a cutting machine or the like. The material layer was cut out to make a sample with a size of 100 mm x 100 mm and a thickness of 10 mm. Then, durometer type A (product name "GS-719N (TYPE A)" The hardness was measured using a 25°C (Teclock) hardness tester and a 50% relative humidity tester. Then, the arithmetic calculation of the hardness of 8 samples excluding the maximum and minimum values ​​out of the 10 samples was performed. The average value was determined as the hardness of the above constituent material.

[0305] The linear shrinkage rate of the first filling portion can be measured as follows. A mold having a size of 130 mm square is prepared, and a two-component hardener for forming a first filling portion is poured into the mold. Chemically modified silicone rubber composition (product name: ELASTOSIL (registered trademark) M 4503, A condensation-curing silicone (manufactured by Asahi Kasei Wacker Silicone Co., Ltd.) is poured into the sample, cured, and the sample is After the sample was completely cured, the dimensions of the sample were measured and compared with the inner dimensions of the mold. The linear shrinkage rate was calculated based on JIS K6249:2003. The arithmetic average value of the linear shrinkage rate of the eight samples excluding the middle, maximum and minimum values ​​was calculated for the above constituent materials. The linear shrinkage rate was calculated.

[0306] <Example 4> In Example 4, the silicone resin composition for forming the first filling portion and the second filling portion was Instead of the composition, a two-part curing silicone rubber composition (product name "ELASTOSIL (registered trademark) The silicone was added using the "M 4601" (trademark, Wacker Asahi Kasei Silicone Co., Ltd., addition reactive). Except for the above, a roll was obtained in the same manner as in Example 1. The silicone rubber composition is white in color and has a shear viscosity of 20 Pa·s when applied. there were.

[0307] <Example 5> In Example 5, the silicone resin composition for forming the first filling portion and the second filling portion was Instead of the composition, a two-component curing urethane resin composition (product name: "Hitohada no Gel", Exxon Corporation) was used. A roll was obtained in the same manner as in Example 1, except that a roll made by Seal Corporation was used. This urethane resin composition is white when mixed, and when applied to the surface of the urethane resin composition, it becomes hard to bend. The viscosity was 6.5 Pa·s.

[0308] <Example 6> First, a fiber-reinforced plastic tube with an inner diameter of 153 mm, an outer diameter of 167 mm and a width of 1600 mm was used. A cylindrical core made of 1380 mm long, 20 mm wide and 100 mm thick is attached to the outer periphery of the core as a fixing member. A rectangular double-sided tape with a thickness of 10 μm was attached to the core in the width direction.

[0309] After the double-sided tape is attached, the core is held by a chucking member of the winding device. The sheet was then 3000 m long, 1490 mm wide and 80 μm thick. m polyethylene terephthalate film (PET film, in-plane retardation Re: 1000 nm, Nz coefficient: 20) The end of the winding in the longitudinal direction is attached to double-sided tape along the width direction of the core. The PET film was then attached to the outer periphery of the core.

[0310] Thereafter, the PET film was wound up once by a winding device to obtain an intermediate roll body. In the roll body, it is located between the core and the first round of PET film, and the PET film The first gap is located between the winding core and the first turn of the PET film. A second gap was formed in contact with the first end surface of the double-sided tape.

[0311] After obtaining the intermediate roll body, the PET that constitutes the outer circumferential surface of the intermediate roll body is wound along the width direction of the core. A one-part curing silicone resin composition (product name: "Hapio") is applied to the surface of the film as a coating material. "Seal Pro HG" (Kanpe Hapio Co., Ltd.) was applied in an environment of 25°C. Silicone The viscosity of the resin composition when applied was 180 Pa·s, and the silicone resin composition was , along the width direction of the core, and the amount of coating per unit width is 1 cm 3 / m in a straight line Specifically, the silicone resin composition was applied to a first region corresponding to the first gap and Each was applied to a second area corresponding to a second gap.

[0312] After the silicone resin composition is applied, the entire PET film is rewound onto the core by a winding device. The silicone resin composition is then applied to the first and second regions between the PET films. In this way, a roll body was obtained. The composition was cured and formed into a 20 mm long, 1340 mm wide sheet of paper provided in the first region between the PET films. The first intervening portion is 300 mm thick and has a maximum thickness of 300 μm, and the second region is provided between the PET film. The second intermediate portion is formed with a length of 20 mm, a width of 1340 mm and a maximum thickness of 300 μm. Ta.

[0313] The in-plane retardation Re of the PET film used in Example 6 was 100% of that of the acrylic resin used in Example 1. The in-plane retardation Re of the film was measured in the same manner as above, except that in this case, The average refractive index N was set to 1.617.

[0314] <Example 7> In Example 7, the sheet had a length of 3000 m, a width of 1340 mm and a thickness of 85 μm acrylic resin film, specifically, an acrylic resin film and a hard coat layer A laminate comprising the above-mentioned is used, and a silicone rubber is used to form the first filling portion and the second filling portion. The composition was applied in the width direction of the core at a coating amount of 0.3 cm per unit width. 3 / m A roll body was obtained in the same manner as in Example 3, except that the coating was applied in a linear manner as shown in FIG.

[0315] The laminate was formed as follows. First, a continuous coating machine was used to apply the laminate to the unwinding roller. From the pipe, the length of 3000 m, the width of 1340 mm and the thickness of 80 μm used in Example 1 were The acrylic resin film is sent to the coating section of the first unit, and the hard coat layer composition 1 is applied. The coating was then dried in the drying section at 70°C for 60 seconds. The solvent in the film is evaporated, and the integrated amount of ultraviolet light in the curing area is 150 mJ / cm 2 So that By irradiating light and curing the coating, a hard coating with a thickness of 5.0 μm and a coating width of 1300 mm was achieved. A coating layer was formed, and a laminate having a length of 3000 m and a thickness of 85 μm was obtained by continuous film formation.

[0316] <Example 8> In Example 8, a silicone rubber composition for forming the first filling portion and the second filling portion is used. The composition is applied in the width direction of the core so that the amount of application per unit width is 0.5 cm 3 / m A roll body was obtained in the same manner as in Example 7, except that the paint was applied in a linear manner to the surface of the substrate.

[0317] <Example 9> In Example 9, a silicone rubber composition for forming the first filling portion and the second filling portion is used. The composition is applied in the width direction of the core so that the amount of application per unit width is 0.8 cm 3 / m A roll body was obtained in the same manner as in Example 7, except that the paint was applied in a linear manner to the surface of the substrate.

[0318] <Example 10> In the tenth embodiment, the silicone rubber for forming the first filling portion and the second filling portion is The composition is applied in an amount of 1 cm per unit width. 3 Other than that, the coating was applied in a straight line so that A roll body was obtained in the same manner as in Example 9.

[0319] <Example 11> In Example 11, a two-component curable silicone is used to form the first filling portion and the second intermediate portion. The shear viscosity of the corn rubber composition when applied is set to 2 Pa·s, and the application amount per unit width is set to 1 .5cm 3 A roll body was obtained in the same manner as in Example 9, except that the thickness was changed to / m.

[0320] <Example 12> In Example 12, the silicone rubber for forming the first filling portion and the second intermediate portion The shear viscosity of the composition when applied was 6.5 Pa·s, and the application amount per unit width was 1.2 cm. m 3 A roll body was obtained in the same manner as in Example 9, except that the thickness was changed to / m.

[0321] <Example 13> First, a fiber-reinforced plastic tube with an inner diameter of 153 mm, an outer diameter of 167 mm and a width of 1600 mm was used. The cylindrical core made of the material was held by a chucking member of the winding device and fixed to the winding device. Then, a two-component curing silicone rubber composition (product name: "ELASTOSIL(R) M 4503", Wacker Asahi Kasei Silicone Co., Ltd. The silicone rubber composition (made of silicone rubber, condensation curing type) was applied to one piece in an environment of 25°C. The silicone rubber composition is applied in the width direction of the core and in the unit direction. Application amount per width is 1cm 3 / m.

[0322] Thereafter, the distance between the double-sided tape and the two-component curing silicone rubber composition is set to 3 mm. As shown in the figure, the fixed member is a rectangular shape with a length of 1380 mm, a width of 20 mm, and a thickness of 10 μm. The double-sided tape was attached along the width direction of the core. The separation distance was measured at 10 points. The arithmetic mean value of the 8 distances excluding the maximum and minimum values ​​was calculated from the 10 distances. In the following examples, the separation distance was determined in this manner. .

[0323] The sheet had a length of 3000 m, a width of 1340 mm and a thickness of 1.0 mm, which were the same as those in Example 7. The end of the 85μm laminate in the longitudinal direction is attached to the double-sided tape along the width direction of the core. The laminate was fixed to the outer peripheral surface of the core by cutting the laminate in the longitudinal direction at the winding start end of the laminate. The tip surface of the double-sided tape in the radial direction of the core is in contact with the silicone rubber composition. It is positioned so that it is almost aligned with the two end faces.

[0324] Then, the laminate is wound around a core by a winding device, and a winding machine is positioned between the core and the first round of the laminate. and filling a first gap adjacent to the tip surface of the winding start end of the laminate with a silicone rubber composition. did.

[0325] Thereafter, the laminate was wound up once by a winding device to obtain an intermediate roll body. In the second gap, which is located between the core and the first turn of the laminate and is in contact with the first end surface of the double-sided tape, A gap had been formed.

[0326] After obtaining the intermediate roll body, a laminate constituting the outer peripheral surface of the intermediate roll body is formed along the width direction of the core. A two-component curing silicone rubber composition (product name: ELASTOS IL(R) M 4503, manufactured by Wacker Asahi Kasei Silicone Co., Ltd., condensation curing type) The silicone rubber composition was applied at a temperature of 25°C. The viscosity of the silicone rubber composition when applied was 180 Pa s. The silicone rubber composition is applied in the width direction of the core at a coating amount of 1 cm 3 The silicone rubber composition was applied in a linear manner so that the thickness of the coating was 1 / m. 2 was applied to the second area corresponding to the gap.

[0327] After the silicone rubber composition is applied, the entire laminate is rewound onto the core by the winding device. The silicone rubber composition was then interposed in the second region between the laminates. In the roll body, the silicone rubber composition hardened and formed a 1 mm wide gap in the first gap. A first filling portion having a width of 340 mm is formed, and a second filling portion having a width of 1340 mm is formed in the second region between the laminates. A department was formed.

[0328] <Example 14> In Example 12, a two-component curable silicone is used to form the first filling portion and the second intermediate portion. Corn rubber composition (product name: ELASTOSIL (registered trademark) M 4503, Asahi Kasei Wa Instead of condensation curing silicone rubber composition manufactured by Kurgan Silicone Co., Ltd., (Product name: ELASTOSIL(R) M 4601, Asahi Kasei Wacker Silicone A roll body was obtained in the same manner as in Example 11, except that a tert-butyl ether (addition reactive, manufactured by Epson Corporation) was used. The shear viscosity of the silicone rubber composition when applied was 10 Pa s.

[0329] <Example 15> In Example 15, a two-component curable silicone was used to form the first filling portion and the second intermediate portion. The shear viscosity of the corn rubber composition when applied is 10 Pa·s, and the application amount per unit width is 0.8cm 3 / m, and between the double-sided tape and the two-component curing silicone rubber composition A roll body was obtained in the same manner as in Example 13, except that the separation distance was 3 mm.

[0330] <Example 16> In Example 16, a two-component curable silicone is used to form the first filling portion and the second intermediate portion. The shear viscosity of the corn rubber composition when applied is 10 Pa·s, and the application amount per unit width is 1.2cm 3 / m, and between the double-sided tape and the two-component curing silicone rubber composition A roll body was obtained in the same manner as in Example 13, except that the separation distance was 3 mm.

[0331] <Comparative Example 1> In Comparative Example 1, the same procedure as in Example 1 was carried out except that no coating material was applied. A roll body was obtained.

[0332] <Comparative Example 2> In Comparative Example 2, the laminate used in Example 7 was used instead of the acrylic resin film. A roll body was obtained in the same manner as in Comparative Example 1, except that the above-mentioned step was performed.

[0333] In the roll bodies according to Examples 1 to 16, the edge thickness T1 of the first filling portion was measured. The edge thickness T1 was measured using a scanning optical interference surface profiler (product name: New View7300) Specifically, the measurement was performed using an acrylic resin film or a PET When the entire film or laminate is unwound, the first filling part adheres to the laminate side and the core is wound. The first filling part was peeled off from the laminate. The sample was cut out from one or more of the first filled portions. The sample included the tip of the first filled portion and was free of dirt and The sample was cut from a random location that had no fingerprints or other marks on it. The following measurement conditions were used for the first charge. The edge thickness T1 of the filling part was measured. The edge thickness T1 was measured at 10 points. Of the 10 thicknesses, calculate the arithmetic average of the thicknesses at 8 locations excluding the maximum and minimum values. This was done by: (Measurement conditions) Objective lens: 10x ·Zoom: 1x ·Measurement area: 2.17mm x 2.17mm Scan Length: 5μm min mod:0.015 ·Temperature: 23℃ Relative humidity: 50%

[0334] <Deformation relaxation length measurement> In the roll bodies according to the examples and comparative examples, the acrylic resin film and the PET film The steps caused by the winding start end of the film or laminate and the steps caused by double-sided tape The length of relaxation was measured from the winding start end to the winding end. As the film or laminate is repeatedly stretched, the difference in level becomes smaller. The film was unrolled while measuring the length (m). Then, at the point where the step was visible, The laminate was cut out. A polyvinyl alcohol film was placed on the cut part of the film or laminate. When the film is attached, it is placed in an indoor environment with an illumination of 800 Lux to 2000 Lux. A white LED lamp was shone on the film and laminate, and visual observation was performed using the reflected light. Then, measure the distance from the point where the step is no longer visible to the end of the winding, and use this as a deformation. The relaxation length was set as the outline of the white LED light reflected on the film or laminate. When there is a distorted part compared with other parts of the film or laminate, it is determined that there is a step At the periphery where the step exists, the contour line of the white LED light reflected is the same as other parts of the film or laminate The part that can be judged to be the same is determined to have no step. The white LED light was arranged so that the longitudinal direction of the white LED light is along the longitudinal direction of the film or laminate. The length of the white L ED light was set as the length across the part with a step and the part without a step in the film or laminate During observation, the side where the line of the white LED light can be clearly seen was appropriately selected so that the white LED light is reflected on the film or laminate and the contour line can be seen Also, the visual observation was performed from all angles (-180° to 180°) with the normal direction of the surface of the film or laminate as the reference (0°).

[0335] <Confirmation of the Existence of the Fourth Intervening Part> In Examples 3 and 7 to 16, it was confirmed whether the fourth intervening part exists on the starting end part . Specifically, first, the laminate was unwound from the roll until the surface became the second laminate . Then, in the roll where the second laminate became the surface, the vicinity of the starting end part was visually observed to observe whether there is a colored part on the starting end part. When there is a colored part on the starting end part, it was determined that the fourth intervening part exists, and when there is no colored part , it was determined that the fourth intervening part does not exist. The number of observers was 15, and all observers determined that the fourth intervening part exists when there is a colored part on the starting end part .

[0336] <Measurement of the Inclinations of L1, L1 + L2, T2, S1, S1 + S2, and IL3> In the roll bodies according to Examples 3 and 7 to 16, when the presence of the fourth intermediate portion was not confirmed, In this case, the length L1, thickness T2, and area S1 are measured, and the length L1 / thickness T2 and area S1 / thickness T2 was calculated. In addition, when the presence of the fourth intervening portion was confirmed, length L1 + length Length L2, thickness T1, T2, area S1 + area S2 are measured, and (length L1 + length L 2) / thickness T2, (area S1+area S2) / thickness T2 were calculated. Note that lengths L1, L2, The thickness T2 and the areas S1 and S2 refer to the portions shown in FIGS.

[0337] Specifically, first, a jig for rotating the roll body and a laser displacement meter (product name "L A "K-G30" (manufactured by Keyence Corporation) was prepared and placed in the designated position. The filling was inserted into a hole in the width direction of the core to rotatably hold the roll body.

[0338] The laser displacement meter is located above the roll body and shines a laser beam onto the surface of the roll body. The three laser displacement meters were placed so that they could be seen from the ground. The locations of the laser displacement meters were as follows. A first position and a second position were determined to divide the width of the laminate into thirds. The first position is located on a first end side of the direction of the sensor, and the second position is located on a second end side opposite to the first position. The first laser displacement meter irradiates the laser beam at the midpoint between the first position and the first end. The second laser displacement meter is positioned so that the laser is focused on the midpoint between the first and second positions. The third laser displacement meter is positioned so that the light is irradiated from the second position and the midpoint of the second end. The sample was placed so that it was illuminated by laser light.

[0339] Then, the roll body is attached to a jig, and the acrylic is removed until the first filling portion is exposed from the roll body. The resin film was then unwound. After that, the first filling section was exposed and the temperature was 23°C and the phase In a 50% humidity environment, the core is rotated at a speed of 30 mm / s while a laser displacement meter is used. The displacement is measured continuously at a sampling period of 200 μs, and the horizontal axis is the position (mm). A graph was obtained with the vertical axis representing the amount of displacement (mm) (see FIGS. 40(A) to 40(C)). This measurement is performed from the tip of the first filling part to the position where it contacts the tip surface. The reference height (0 mm displacement line) is the height of the core, and the difference in height between the core and the first filling part is The thickness of the first filling part was calculated by the following equation. This graph shows a plane including the radial direction. In addition, the horizontal axis of the graph is scaled at 5 mm. , one division on the vertical axis is 0.02 mm.

[0340] In this graph, the position on the displacement curve where the displacement amount starts to drop suddenly is designated as position E1. When the presence of the fourth intervening part was not confirmed, the displacement was set to 0 mm. By calculating the difference in the amount of displacement at the position E1, the thickness of the first filling part at the position in contact with the tip surface can be calculated. We calculated T2.

[0341] When the presence of the fourth intermediate portion was confirmed, the thickness T2 was measured by the following method. First, the part including the winding start end 12A, the first filling part 14, and the second turn of the sheet 12 is A sample measuring 2cm x 2cm was taken from this area and fixed in place, taking care not to crush it. The cross-sections of the fixed samples were then polished and stored at 23°C and 50% relative humidity. The thickness T2 of the first filling part was measured using a stereo microscope (product name: Digital Microscope VHX-70 The thickness T2 was measured using a stereo microscope. Coaxial epi-illumination was selected as the illumination for the 1D microscope, and the magnification was 500x. The experiment was carried out in reflected light.

[0342] In addition, when the presence of the fourth intermediate portion is not confirmed, the length L1 is the same as the thickness T2. The position displacement curve was obtained from the graph. Specifically, first, the position E1 and the displacement were obtained from the graph. The intersection point of the displacement 0 mm line and the position displacement curve where the displacement starts to rise is called position E2. Next, an imaginary line IL4 was drawn that passed through the position E1 and was perpendicular to the 0 mm displacement line. The intersection of the imaginary line IL4 and the 0 mm displacement line is set as position E3, and the intersection of position E2 and position The length L1 was calculated by calculating the distance from the position E2 to the position E3. In the area up to E3, calculate the product of the thickness at each measurement point and the width between each measurement point, and sum them up. The width between the measurement points was calculated based on the above formula (3). The result was 6.24 μm, calculated from the winding period, the rotation speed of the winding core, and the outer diameter of the winding core. When the presence of the fourth intervening portion is confirmed, the same as when the presence of the fourth intervening portion is not confirmed Length L1+length L2 was calculated in the same manner as for length L1.

[0343] If the presence of the fourth intermediate portion is not confirmed, the length L1, the thickness T2, Using the area S1, the length L1 / thickness T2 and area S1 / thickness T2 were calculated. If the presence of the part is confirmed, the sum of the length L1 and the length L2, the thickness T2, and the area S1 Using the sum of length L1 + length L2) / thickness T2, (area S1 + area S2 ) / thickness T2 was calculated.

[0344] Also, in the above graph, a virtual line IL3 (see FIGS. 40(A) to FIG. 40(C)) passing through position E1 and position E2 was drawn, and the slope of this virtual line IL3 was obtained.

[0345] <Measurement of L4, T6, S3> In the roll bodies according to Examples 13 to 16, the length L4, the maximum thickness T6, and the cross-sectional area S3 were measured, and L4 / maximum thickness T6 and cross-sectional area S3 / maximum thickness T6 were obtained. Note that the length L4 and the maximum thickness T6 mean the portions shown in FIG. 27, and the cross-sectional area S3 means the portion shown in FIG. 29. The length L4, the maximum thickness T6, and the cross-sectional area S3 were measured using a jig for rotating the roll body and a laser displacement meter (product name "LK-G30", manufactured by Keyence Corporation). Specifically, first, in the same manner as the measurement of the length L1 and the like, the roll body was attached to the jig and three laser displacement meters were arranged at predetermined positions, and then the laminate was fed out until the second intervening portion was exposed from the roll body. Then, with the second intervening portion exposed, while rotating the core at a rotational speed of 30 mm / s under an environment of a temperature of 23°C and a relative humidity of 50%, the displacement amount was continuously measured at a sampling period of 200 μs by the laser displacement meter, and a graph was obtained with the horizontal axis as the position (mm) and the vertical axis as the displacement amount (mm). This measurement was performed from the second tip on the opposite side of the first tip on the double-sided tape side of the second intervening portion toward the first tip. In this measurement, the reference height (displacement amount 0 mm line) was set as the height of the core, and the difference in height between the core and the second intervening portion was set as the thickness of the second intervening portion. The obtained graph represents a plane substantially including the longitudinal direction of the sheet and the radial direction of the core. Also, in this graph, one scale on the horizontal axis was set to 5 m m, and one scale on the vertical axis was set to 0.02 mm.

[0346] ​​​​​In this graph, find the position where the displacement is the highest, and compare this with the 0 mm displacement line. The difference in the amount of displacement at each position was calculated to determine the maximum thickness T6 at the second intermediate portion.

[0347] In addition, from this graph, the displacement amount 0 mm line and the position change Then, the first position, which is the intersection point of the displacement curve, is found. Then, passing through the position where the displacement amount is the highest, Then, a virtual line perpendicular to the 0 mm displacement line was drawn. The intersection of the two lines is set as the second position, and the length L4 is calculated by finding the distance between the first and second positions. The cross-sectional area S3 is the thickness at each measurement point in the region from the first position to the second position. The product of the distance between each measurement point and the width between the measurement points was calculated and the total was calculated. The width of the interval is calculated based on the above formula (3), taking into account the sampling period, the rotation speed of the winding core, and the The outer diameter was calculated to be 6.24 μm.

[0348] In addition, using the length L4, maximum thickness T6, and cross-sectional area S3, length L4 / maximum thickness T6 , the cross-sectional area S3 / maximum thickness T6 was calculated.

[0349] The results are shown in Tables 1 to 3 below. [Table 1]

[0350] [Table 2]

[0351] [Table 3]

[0352] The roll body according to Comparative Example 1 has a deformation relaxation length at the winding start end and a deformation relaxation length at the double-sided tape. The deformation relaxation length was long because the first gap was hollow. The step caused by the beginning of the winding of the resin film was large, and the second gap was hollow. This is thought to be because the step caused by the double-sided tape was large. The roll bodies according to Nos. 1 to 12 have a deformation relaxation length at the winding start end and a deformation relaxation length at the double-sided tape. The deformation relaxation length was shorter than that of the roll body of Comparative Example 1. This is because In the roll bodies according to 7 to 15, the first gap was filled with the first filling portion. The step caused by the winding start end of the kryl resin film is small, and the second filling part is in the second gap. Since the second interposed portion was filled in the area corresponding to the second gap, This is believed to be because the step caused by the loop was small. Since the first interposition portion was present in the first region corresponding to the first gap, the start of winding the PET film The step caused by the end is small, and the second intermediate portion is interposed in the second region corresponding to the second gap. This is thought to be because the difference in height caused by the double-sided tape was small.

[0353] The first filling portion of the roll body according to Examples 3 and 8 to 16 has a length L1 / thickness T2 or (length L1 + length L2) / thickness T2 is 90 or more, and / or area S1 / thickness T2 or Since (area S1 + area S2) / thickness T2 is 3.0 or more, length L1 / thickness T2 is The deformation relaxation length at the winding start end was shorter than that of the roll body of Example 7, which was less than 90. Ta.

[0354] The second intermediate portion of the roll body according to Examples 13 to 16 has a length L4 / maximum thickness T6 of 12 or more. and / or the cross-sectional area S3 / maximum thickness T6 was 2.5 or more, The deformation relaxation length in the loop was short.

[0355] In the roll bodies of Examples 1, 2, 6, and 13, the silicone resin composition and Since the shear viscosity of the silicone rubber composition was 60 Pa·s or more, the core and the acrylic resin The composition may protrude from between the film and PET film during application and winding. No change was observed when pressure was applied. In the case of the polymer, the shear viscosity of the composition at the time of application was less than 60 Pa·s, but it was 15 Pa·s. s, so there was no overflow when applying, but pressure was applied when winding. In Examples 5, 11, 12, and 14 to 16, the composition was found to overflow during application. Since the shear viscosity of the composition was less than 15 Pa·s, the core and the acrylic resin film Protrusion of the composition from between the gaps was observed.

[0356] In addition, a reworkability test was carried out on the roll body according to Example 3. Specifically, first The acrylic resin film was then unwound to expose the first filling portion. Be careful not to damage the end of the core, but create an opening with a blade, and slowly remove the first part from the core with your fingers. The evaluation criteria for reworkability are whether the first filled part peels off cleanly. When a part of the first filling portion remained on the core due to breakage or the like, it was judged as poor. In such an evaluation, the first filling portion of the roll body according to Example 3 was peeled off cleanly. The reworkability test was also favorable for the roll bodies according to the examples other than Example 3. When the reworkability was tested, it was found to be as good as that of the first filling part according to Example 3. The tensile strength of the material constituting the first filling portion in the roll body according to the embodiment other than Example 3 is 3.0 MP a or more and 5.5 MPa or less, the elongation at break is 250% or more and 600% or less, and the tear strength is The strength of the first charge is between 6N / mm and 25N / mm, and is measured with a durometer type A. The hardness of the material of the filling portion is 10° or more and 50° or less, and the linear shrinkage of the material of the first filling portion is The rate was in the range of 0% to 1.0%. The edge thickness T1 of the first filling portion of the roll body according to Examples 1 to 16 is 1.5 μm or more and 20 μm or less. When peeling off the first filling part or cleaning or wiping it off, the edge thickness When thickness T1 was thicker, it was slightly easier to peel off or remove the first filling part.

[0357] In Examples 1 to 12, the silicone resin composition or silicone rubber composition was applied to a double-sided tape. In Examples 1 to 12, the coating was applied so as to contact the first and second end faces of the cap. The distance between the silicone resin composition or silicone rubber composition and the double-sided tape is 1 mm. The silicone resin composition or silicone rubber composition is applied and the double-sided tape is placed so that the As a result, it was possible to stably produce roll bodies, and the obtained roll bodies were similar to those in Examples 1 to 4. The evaluation results and measurement results of the roll body according to Example 12 were almost the same as those of the roll body according to Example 12. In Examples 1 to 12, the silicone resin composition or silicone rubber composition and the double-sided tape The silicone resin composition or silicone rubber composition was applied or both were coated so that the separation distance was 3 mm. By arranging the surface tape, the roll body could be stably produced, and the obtained roll body was The above evaluation results and measurement results for the roll bodies according to Examples 1 to 12 were almost the same. In these cases, first, the silicone resin composition or the like is applied in a line along the width direction of the core, and then After that, the distance between the second end face of the double-sided tape and the silicone resin composition or the like is 1 mm or 3 mm. The double-sided tape is arranged so that the first end surface of the double-sided tape and the silicone resin composition are bonded to each other. The silicone resin composition or the like is applied in the width direction of the core so that the distance between the The paint was applied in a line along the line.

[0358] Furthermore, in Example 2, the distance between the silicone rubber and the double-sided tape is 5 mm. When the silicone rubber composition was applied and the double-sided tape was placed as shown in the figure, the roll could be stably The roll bodies obtained also meet the above evaluation results of the roll body according to Example 2. The results were almost the same as the measurement results. The edge thickness T1 was 2 μm. First, the silicone rubber composition is applied in a line along the width direction of the core, and then the double-sided tape is applied. The double-sided tape was placed so that the distance between the second end face and the silicone rubber composition was 5 mm. Furthermore, the distance between the first end surface of the double-sided tape and the silicone rubber composition is set to 5 mm. The silicone rubber composition was then applied in a linear fashion along the width direction of the core.

[0359] In Example 3, a silicone rubber composition having a shear viscosity of 40 Pa·s at the time of application was used. For example, the shear viscosity during application was set to 7 Pa·s, and the thickness of the double-sided tape and silicone rubber was When the separation distance between the rubber compositions was set to 11 mm, the rubber composition located on the first end side of the double-sided tape The rubber composition of the ricone flowed to the side opposite to the double-sided tape. The temperature was set to 250 Pa·s, and the shield was placed so as to contact the first and second end faces of the double-sided tape. When the ricone rubber composition was placed, even if it was wrapped with an acrylic resin film, it was not sufficiently After hardening, a slight step occurred at the beginning of the winding. Wait. [Explanation of symbols]

[0360] 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120, 1 30, 140, 150...Roll body 11...Core 11A…Outer surface 12…Sheet 12A…Start of winding end 12A1…Tip surface 12D…First area 12E…Second area 12F…Third area 12G...end 12H…Convex 13…First gap 14…First filling section 15, 52…Second gap 16, 53…Second filling section 17, 51…Fixing members 17A, 51A...1st end surface 17B, ​​51B…Second end surface 21, 54…Third gap 22, 55…Third filling section 71...First intervening part 72…Second intervening part 73...Intermediate roll body 81...Third intervening part 201~207…Coating materials

Claims

1. A roll body including a core and a long sheet wound around an outer peripheral surface of the core, a first gap located between the winding core and the first turn of the sheet and in contact with a tip end surface located in the longitudinal direction at a winding start end of the first turn of the sheet; a first intermediate portion that is provided in a first region corresponding to at least the first gap between the sheets in a first turn or later and extends in a width direction of the winding core; The roll body comprises:

2. A roll body including a core and a long sheet wound around an outer peripheral surface of the core, a fixing member provided between the core and the first turn of the sheet, the fixing member having a first end surface extending in a width direction of the core and a second end surface opposite to the first end surface, and fixing a portion of the sheet to the core; a second gap located between the core and the first turn of the sheet and in contact with the first end surface of the fixing member; a third gap located between the core and the first turn of the sheet and in contact with the second end surface of the fixing member; at least one of a second intermediate portion provided in a second region corresponding to the second gap between the sheets in the first turn or later and extending in the width direction of the winding core, and a third intermediate portion provided in a third region corresponding to the third gap between the sheets in the first turn or later and extending in the width direction of the winding core; The roll body comprises:

3. 3. The roll body according to claim 2, wherein, when a thickness of the second intermediate portion is measured along the longitudinal direction of the sheet, a ratio of a length L4 from a second tip of the second intermediate portion opposite to a first tip of the second intermediate portion on the fixing member side in the longitudinal direction to a position at which the second intermediate portion has the maximum thickness T6 is 12 or more to a maximum thickness T6 of the second intermediate portion.

4. 4. The roll body according to claim 3, wherein a ratio of a cross-sectional area S3 of the second intermediate portion from the second tip of the second intermediate portion to a position of the maximum thickness T6 in a plane including the longitudinal direction of the sheet and the radial direction of the winding core to a maximum thickness T6 of the second intermediate portion is 2.5 or more.

5. 3. The roll body according to claim 1, wherein the sheet has convex portions protruding in a radial direction of the core at both ends extending along the longitudinal direction of the sheet.

6. The roll body according to claim 1 , wherein the sheet comprises a resin film.

7. The roll body according to claim 1 , wherein the sheet comprises an acrylic resin, a polyester resin, or a cycloolefin polymer resin.

8. The roll body according to claim 6 or 7, wherein the sheet has a thickness of 15 μm or more and 300 μm or less.

9. The roll body according to claim 1 , wherein the first intermediate portion includes a coloring material or a luminescent material.

10. The roll body according to claim 2 , wherein the second intermediate portion and the third intermediate portion each contain a coloring material or a light-emitting material.

11. The roll body according to claim 1 , wherein the first intermediate portion comprises a cured product of a curable polymer composition.

12. The roll body according to claim 2 , wherein the second intermediate portion and the third intermediate portion each include a cured product of a curable polymer composition.

13. The roll body according to claim 1 , wherein the sheet is a laminate having a substrate and one or more functional layers laminated on the substrate.

14. The roll body according to claim 1 , wherein the sheet is used for an optical film, a polarizing plate, or a display device.

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