Sheet, roll sheet and sheet laminate

Abstract

To provide a sheet, a roll sheet, and a sheet laminate capable of suppressing blocking and also suppressing damage to the sheet.SOLUTION: A sheet includes a first surface 11 and a second surface. The sheet includes a first region and a second region. The first region has at least one of an optical function, a hard coat function, an anti-soiling function, and a scratch resistance function. The first surface 11 includes a protruding part 40 in the second region. The protruding part 40 includes, in a cross-sectional view, two apexes 41 and a recessed part 42 located between the two apexes 41.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present disclosure relates to a sheet, a roll sheet, and a sheet laminate.

Background Art

[0002] Sheets having functions such as optical functions are known. Such sheets are usually stored and transported as a roll sheet in which the sheet is wound in a roll shape, or as a sheet laminate in which a plurality of sheets are laminated. At this time, sticking (blocking) between the sheets may become a problem. As a countermeasure against this, a technique of providing convex portions (narrowing) on the sheet is known. However, in this case, since the convex portions come into contact with the second surface of the sheet, the convex portions may damage the sheet.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to provide a sheet, a roll sheet, and a sheet laminate that can suppress blocking and also suppress damage to the sheet.

Means for Solving the Problems

[0005] Embodiments of the present disclosure relate to the following [1] to

[20] .

[0006] [1] A sheet including a first surface and a second surface, comprising a first region and a second region, wherein the first region has a function, and the first surface includes convex portions in the second region, The convex portion includes, in a cross-sectional view, two tops and a recessed portion located between the two tops, and is a sheet.

[0007] [2] The sheet according to [1], wherein the function includes at least any one of an optical function, a hard coat function, an antifouling function, and a scratch resistance function.

[0008] [3] The first surface includes the two convex portions. The first region is located between the two convex portions, and is the sheet according to [1] or [2].

[0009] [4] The convex portion is formed in a dot shape, and is the sheet according to any one of [1] to [3].

[0010] [5] The top is formed in a circumferential shape. The recessed portion is surrounded by the top, and is the sheet according to [4].

[0011] [6] The sheet has a longitudinal direction and a lateral direction. The first surface includes a plurality of the convex portions. The plurality of convex portions are arranged along the longitudinal direction, and is the sheet according to any one of [3] to [5].

[0012] [7] The sheet has a longitudinal direction and a lateral direction. The convex portion is formed linearly along the longitudinal direction, and is the sheet according to any one of [1] to [3].

[0013] [8] The depth of the recessed portion is deeper than the height of the top, and is the sheet according to any one of [1] to [7].

[0014] [9] The first surface includes a concave portion adjacent to the convex portion in the second region, and is the sheet according to any one of [1] to [8].

[0015]

[10] The first surface includes two of the concave portions in a cross-sectional view. The convex portion is located between the two concave portions, the sheet according to [9].

[0016]

[11] The sheet includes a base material and a resin layer in this order from the second surface toward the first surface. The resin layer constitutes the first surface. The resin layer includes the convex portion, the sheet according to any one of [1] to

[10] .

[0017]

[12] The resin layer includes a cured product of a radiation curable resin composition, the sheet according to

[11] .

[0018]

[13] The sheet includes a base material, a resin layer, and a surface layer in this order from the second surface toward the first surface. The surface layer constitutes the first surface. The surface layer includes the convex portion, the sheet according to any one of [1] to

[10] .

[0019]

[14] The resin layer includes a resin convex portion. In a cross-sectional view, the resin convex portion includes two resin tops and a resin depression portion located between the two resin tops. The depression portion faces the resin depression portion in the thickness direction, the sheet according to

[13] .

[0020]

[15] The resin layer includes a cured product of a radiation curable resin composition, the sheet according to

[13] or

[14] .

[0021]

[16] The sheet has a longitudinal direction and a lateral direction. The sheet includes a plurality of first regions. The plurality of first regions are arranged along the longitudinal direction and are also arranged along the lateral direction, the sheet according to any one of [1] to

[15] .

[0022]

[17] The first surface includes the plurality of convex portions. Each of the first regions is located between the two convex portions, the sheet according to

[16] .

[0023]

[18] Each of the first regions is the sheet according to

[16] or

[17] , surrounded by the convex portions.

[0024]

[19] A roll sheet in which the sheet according to any one of [1] to

[18] is wound in a roll shape.

[0025]

[20] A sheet laminate in which a plurality of sheets according to any one of [1] to

[18] are laminated. [Advantages of the Invention]

[0026] According to the embodiment of the present disclosure, it is possible to suppress damage to the sheet while suppressing blocking. [Brief Description of the Drawings]

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Figure 26

Mode for Carrying Out the Invention

[0028] Hereinafter, the sheet, roll sheet, and sheet laminate will be described in detail with reference to the drawings. The following embodiments are examples of the embodiments of the present disclosure, and the present disclosure is not construed as being limited to these embodiments. In this specification, terms such as "base material", "sheet", and "film" are not distinguished from each other based only on the difference in name. For example, the "base material" is a concept that includes members that can be called sheets or films. The "surface" refers to the surface that coincides with the planar direction of the target plate-like member when the target plate-like member is viewed as a whole and globally. The normal direction used for the plate-like member refers to the normal direction with respect to the surface of the member. Regarding the terms used in this specification to specify shapes, geometric conditions, and their degrees, such as terms like "parallel" and "orthogonal", as well as values of lengths and angles, etc., they are not restricted by strict meanings and are interpreted to include ranges that can be expected to have similar functions.

[0029] In this specification, when a plurality of upper limit value candidates and a plurality of lower limit value candidates are listed for a certain parameter, the numerical range of that parameter may be constituted by combining any one upper limit value candidate and any one lower limit value candidate. For example, consider the case where it is described that "parameter B is, for example, A1 or more, may be A2 or more, and may be A3 or more. Parameter B is, for example, A4 or less, may be A5 or less, and may be A6 or less." In this case, the numerical range of parameter B may be A1 or more and A4 or less, may be A1 or more and A5 or less, and may be A1 or more and A6 or less. Also, the numerical range of parameter B may be A2 or more and A4 or less, may be A2 or more and A5 or less, and may be A2 or more and A6 or less. Also, the numerical range of parameter B may be A3 or more and A4 or less, may be A3 or more and A5 or less, and may be A3 or more and A6 or less.

[0030] In the drawings referred to in this embodiment, the same or similar parts are denoted by the same or similar reference numerals, and repeated descriptions thereof may be omitted. In addition, the dimensional ratios in the drawings may differ from the actual ratios for convenience of explanation, or a part of the configuration may be omitted from the drawings.

[0031] FIG. 1 is a schematic view showing a roll sheet 1 according to an embodiment. The roll sheet 1 is configured by winding a sheet 10 in a roll shape. That is, the roll sheet 1 includes a sheet 10 wound in a roll shape. The sheet 10 may be wound around a cylindrical winding core 3. The sheet 10 is stored and transported as a roll sheet 1 in which the sheet is wound in a roll shape.

[0032] The sheet 10 may be long. That is, the sheet 10 may have a longitudinal direction and a lateral direction. The "longitudinal direction" means the direction along the longest edge of the sheet 10 in a state where the sheet 10 is spread out. The "lateral direction" means the direction in which the minimum length of the sheet 10 is obtained in a state where the sheet 10 is spread out. The longitudinal direction corresponds to the winding direction of the sheet 10 in the roll sheet 1. The lateral direction corresponds to the width direction of the sheet 10. The lateral direction may be orthogonal to the longitudinal direction. In the following description, the lateral direction is also referred to as the X direction, and the longitudinal direction is also referred to as the Y direction. Also, the direction orthogonal to both the X direction and the Y direction is also referred to as the Z direction. The Z direction is the thickness direction of the sheet 10. The thickness direction means the normal direction of the sheet 10 in a state where the sheet 10 is spread out.

[0033] The longitudinal dimension (dimension in the Y direction) of the sheet 10 is, for example, 50 m or more, may be 500 m or more, and may be 2000 m or more. The longitudinal dimension of the sheet 10 is, for example, 5000 m or less, may be 1000 m or less, and may be 100 m or less. The lateral dimension (dimension in the X direction) of the sheet 10 is, for example, 0.2 m or more, may be 0.5 m or more, and may be 1 m or more. The lateral dimension of the sheet 10 is, for example, 2 m or less, may be 1 m or less, and may be 0.5 m or less.

[0034] Figure 2 is a cross-sectional view (XZ cross-sectional view) of the sheet 10 in FIG. 1. The sheet 10 includes a first surface 11 and a second surface 12. The first surface 11 may be generally formed in a flat shape. More specifically, the first surface 11 may be formed in a flat shape at a position where the functional part 35 and the convex part 40 described later are not provided. The second surface 12 is located on the side opposite to the first surface 11. The second surface 12 may be formed in a flat shape. The first surface 11 and the second surface 12 may be parallel to each other.

[0035] The sheet 10 may include a base material 20 and a resin layer 30 in this order from the second surface 12 toward the first surface 11. In this case, the base material 20 constitutes the second surface 12 of the sheet 10, and the resin layer 30 constitutes the first surface 11 of the sheet 10.

[0036] The base material 20 is a member that supports the resin layer 30. The base material 20 includes a first base material surface 21 and a second base material surface 22. The first base material surface 21 may be formed in a flat shape. The resin layer 30 is located on the first base material surface 21. The second base material surface 22 is located on the side opposite to the first base material surface 21. The second base material surface 22 constitutes the second surface 12 of the sheet 10.

[0037] The base material 20 may be composed of a polymer. Examples of the polymer include cellulose acetate, polycarbonate-based polymers, polyester-based polymers such as polyethylene terephthalate or polyethylene naphthalate, acrylic-based polymers such as polymethyl methacrylate, or styrene-based polymers such as polystyrene or acrylonitrile-styrene copolymer (AS resin). Further examples of the polymer include polyolefins such as polyethylene and polypropylene, polyolefin-based polymers such as ethylene-propylene copolymer, vinyl chloride-based polymers, amide-based polymers such as nylon or aromatic polyamide, imide-based polymers, sulfone-based polymers, polyethersulfone-based polymers, polyetheretherketone-based polymers, polyphenylene sulfide-based polymers, vinylidene chloride-based polymers, vinyl alcohol-based polymers, vinyl butyral-based polymers, allylate-based polymers, polyoxymethylene-based polymers, epoxy-based polymers, or mixtures of these polymers. Additionally, the base material 20 may be composed of glass.

[0038] When the base material 20 is composed of a polymer, the thickness of the base material 20 may be 25 μm or more and 125 μm or less. When the base material 20 is composed of glass, the thickness of the base material 20 may be 100 μm or more and 5000 μm or less.

[0039] The resin layer 30 is located on the base material 20. More specifically, the resin layer 30 is located on the first base material surface 21. The resin layer 30 includes a first resin surface 31 and a second resin surface 32. The first resin surface 31 constitutes the first surface 11 of the sheet 10. The second resin surface 32 is located on the side opposite to the first resin surface 31. The second resin surface 32 may be formed flat. The second resin surface 32 faces the first base material surface 21. The second resin surface 32 may be in contact with the first base material surface 21. Although not shown, a primer layer may be provided between the base material 20 and the resin layer 30.

[0040] The resin layer 30 may contain a cured product of a radiation-curable resin composition. The radiation-curable resin composition is a resin composition that cures upon irradiation with radiation. Examples of radiation include ultraviolet rays (UV) and electron beams (EB). Also included as radiation are electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams. The radiation-curable resin composition may contain, for example, one or more selected from urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, polycarbonate acrylate, and acrylic acrylate. Further, the radiation-curable resin composition may contain at least one of a photopolymerization initiator and a photopolymerization accelerator. Additionally, the radiation-curable resin composition may contain arbitrary additives.

[0041] The thickness of the resin layer 30 is, for example, 0.5 μm or more, and may be 1 μm or more, or may be 2 μm or more. The thickness of the resin layer 30 is, for example, 20 μm or less, and may be 15 μm or less, or may be 10 μm or less.

[0042] The resin layer 30 may have a specific function. The function may include at least any one of an optical function, a hard coat function, an antifouling function, and a scratch resistance function. In particular, the resin layer 30 may have an optical function. Examples of the optical function include a low reflection function, an antiglare function, a light diffusion function, a light reflection function, a light absorption function, and a light diffraction function. As shown in FIG. 2, the resin layer 30 may include a functional portion 35. The functional portion 35 is a portion having the above functions. The functional portion 35 may be provided on the first resin surface 31.

[0043] The functional part 35 may be constituted by, for example, an uneven pattern formed on the first resin surface 31. The functional part 35 may be configured to exhibit the above-described functions, such as optical functions like a light diffraction function, by such an uneven pattern. The uneven pattern may be formed by providing a pattern of recesses on the first resin surface 31. The depth of the recesses may be, for example, 2 nm or more, may be 10 nm or more, and may be 20 nm or more. The depth of the recesses may be, for example, 200 nm or less, may be 100 nm or less, and may be 50 nm or less.

[0044] The sheet 10 includes a first region 13 and a second region 14. The first region 13 is a region having the above-described functions. The first region 13 may be a region of the sheet 10 where the functional part 35 of the resin layer 30 is provided. That is, the first region 13 may be a region that overlaps with the functional part 35 in a plan view. In this specification, "plan view" means observing an object along the Z direction. The second region 14 is a region other than the first region 13. The second region 14 may not have the above-described functions. The second region 14 may have functions different from those of the first region 13.

[0045] FIG. 3 is a plan view of the sheet 10 of FIG. 1. The sheet 10 may include a plurality of first regions 13. That is, the resin layer 30 may include a plurality of functional parts 35. The plurality of first regions 13 (functional parts 35) may be arranged along the X direction. The plurality of first regions 13 may be arranged along the Y direction. The plurality of first regions 13 may be arranged along the X direction and along the Y direction. For example, as shown in FIG. 3, the plurality of first regions 13 may be arranged in a lattice pattern in a plan view.

[0046] As shown in FIGS. 2 and 3, the first surface 11 of the sheet 10 includes a convex portion 40 in the second region 14. As shown in FIGS. 2 and 3, the resin layer 30 may include the convex portion 40. More specifically, the convex portion 40 may be formed in a region of the first resin surface 31 where the functional portion 35 is not provided. The convex portion 40 protrudes in the Z direction from the first surface 11 (the first resin surface 31). The convex portion 40 is also referred to as a knurling portion.

[0047] The first surface 11 may include two convex portions 40. The first region 13 may be located between the two convex portions 40. For example, one of the two convex portions 40 may be located on the first side (the left side in FIG. 3) in the X direction of the first region 13, and the other of the two convex portions 40 may be located on the second side (the right side in FIG. 3) in the X direction of the first region 13. When the sheet 10 includes a plurality of first regions 13, the first surface 11 may include a plurality of convex portions 40. In this case, each of the first regions 13 may be located between two convex portions 40.

[0048] The distance L1 between the convex portions 40 in the X direction is, for example, 50 mm or more, may be 600 mm or more, and may be 1500 mm or more. The distance L1 between the convex portions 40 in the X direction is, for example, 2000 mm or less, may be 1000 mm or less, and may be 500 mm or less. The distance L1 between the convex portions 40 in the X direction is the distance in the X direction between the convex portion 40 located on the first side in the X direction of the first region 13 and the convex portion 40 located on the second side in the X direction of the first region 13.

[0049] FIG. 4 is a plan view showing an enlarged part of the sheet 10 in FIG. 3. As shown in FIG. 4, the convex portions 40 may be formed in a dot pattern. The first surface 11 may include a plurality of convex portions 40. The plurality of convex portions 40 may be arranged along the Y direction. The plurality of convex portions 40 may be arranged in a straight line along the Y direction, or may be arranged in a zigzag pattern along the Y direction as a whole. The plurality of convex portions 40 may be arranged from the end of the sheet 10 on the first side (the lower side in FIG. 3) in the Y direction to the end of the sheet 10 on the second side (the upper side in FIG. 3) in the Y direction.

[0050] The arrangement pitch p1 of the convex portions 40 in the Y direction is, for example, 100 μm or more, and may be 500 μm or more, or may be 1000 μm or more. The arrangement pitch p1 of the convex portions 40 in the Y direction is, for example, 2000 μm or less, and may be 1000 μm or less, or may be 500 μm or less. The arrangement pitch p1 of the convex portions 40 in the Y direction is the distance between two adjacent convex portions 40 in the Y direction.

[0051] FIG. 5 is a plan view showing an enlarged view of the periphery of the convex portion 40 of the sheet 10 in FIG. 4. FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5. As shown in FIG. 5, the convex portion 40 may have a circular shape in plan view. As shown in FIG. 6, the convex portion 40 includes two tops 41 and a recessed portion 42 in cross-sectional view. In this specification, "cross-sectional view" means observing the object with a cross-section (cutting plane) along the Z direction. In the example shown in FIG. 6, the resin layer 30 is observed with an XZ cross-section.

[0052] The two tops 41 are portions protruding in the Z direction from the first surface 11. That is, the two tops 41 protrude to the first side (the upper side in FIG. 6) in the Z direction from the first surface 11. As shown in FIG. 5, the top 41 may be formed in a circumferential shape. That is, the top 41 may be formed continuously in the circumferential direction. The top 41 may have an annular shape in plan view.

[0053] As shown in FIG. 6, in a cross-sectional view, the heights of the two tops 41 may be equal or different. The height h1 of the top 41 is, for example, 0.03 μm or more, and may be 2 μm or more, or may be 5 μm or more. The height h1 of the top 41 is, for example, 10 μm or less, and may be 2 μm or less, or may be 1 μm or less. The height h1 of the top 41 is the height based on the first surface 11.

[0054] The distance L2 between the two tops 41 is, for example, 0.05 μm or more, and may be 10 μm or more, or may be 100 μm or more. The distance L2 between the two tops 41 is, for example, 500 μm or less, and may be 50 μm or less, or may be 5 μm or less. The distance L2 between the two tops 41 is the distance in the X direction between the vertices of the two tops 41.

[0055] The recessed portion 42 is a portion recessed in the Z direction from the top 41. That is, the recessed portion 42 is recessed on the second side (the lower side in FIG. 6) in the Z direction from the top 41. The recessed portion 42 may be recessed on the second side in the Z direction from the first surface 11. The recessed portion 42 is located between the two tops 41. As shown in FIG. 5, when the tops 41 are formed in a circumferential shape, the recessed portion 42 may be surrounded by the tops 41.

[0056] As shown in FIG. 6, the depth h2 of the recessed portion 42 may be deeper than the height h1 of the top 41. The depth h2 of the recessed portion 42 is, for example, 0.01 μm or more, and may be 0.5 μm or more, or may be 1 μm or more. The depth h2 of the recessed portion 42 is, for example, 10 μm or less, and may be 5 μm or less, or may be 1 μm or less. The depth h2 of the recessed portion 42 is the depth based on the vertex of the top 41.

[0057] As shown in FIGS. 5 and 6, the first surface 11 may include a recess 45 in the second region 14. The recess 45 is a portion recessed in the Z direction from the first surface 11. That is, the recess 45 is recessed on the second side (the lower side in FIG. 6) in the Z direction from the first surface 11.

[0058] The concave portion 45 is adjacent to the convex portion 40. As shown in FIG. 6, the first surface 11 may include two concave portions 45 in a cross-sectional view. The convex portion 40 may be located between the two concave portions 45. For example, one of the two concave portions 45 may be located on the first side (the left side in FIG. 6) of the convex portion 40 in the X direction, and the other of the two concave portions 45 may be located on the second side (the right side in FIG. 6) of the convex portion 40 in the X direction. As shown in FIG. 5, the concave portion 45 may be formed in a circumferential shape. That is, the concave portion 45 may be formed continuously in the circumferential direction. The concave portion 45 may have an annular shape in a plan view.

[0059] As shown in FIG. 6, the depth h3 of the concave portion 45 may be shallower than the depth h2 of the recessed portion 42. The depth h3 of the concave portion 45 may be shallower than the height h1 of the top portion 41. The depth h3 of the concave portion 45 is, for example, 0.001 μm or more, may be 0.02 μm or more, and may be 0.05 μm or more. The depth h3 of the concave portion 45 is, for example, 0.5 μm or less, may be 0.1 μm or less, and may be 0.05 μm or less. The depth h3 of the concave portion 45 is the depth based on the first surface 11.

[0060] The thickness of each of the above members is calculated from an image taken by a scanning electron microscope. The above distances L1, L2, height h1, depths h2, h3, etc. are measured using a white light interference microscope "New View 6300" manufactured by Zygo Corporation. Each dimension is calculated from the arithmetic mean value of the measured values by extracting five convex portions 40 from a 10 mm square. On the other hand, the above arrangement pitch p1 is calculated from the arithmetic mean value of the measured values of the arrangement pitch of the convex portions 40 observed within a distance of 20 mm. The measurement conditions and analysis conditions in the above white light interference microscope "New View 6300" manufactured by Zygo Corporation are as follows.

[0061] (Measurement conditions) Objective lens: 2.5 times ImageZoom: 1 time Stitch Controls Measurement area: 4.35 × 4.40 μm ·Acquisition Mode:Scan ·Camera Mode:496x496 70 Hz ·Subtract Sys Err:Off ·Sys Err File:SysErr.Dat ·AGC:Off ·Phase Res:High ·Connection Order:Location ·Discon Action:Filter ·Min Mod(%):0.001 ·Min Area Size:7 ·Remove Fringes:On ·Number of Averages:0 ·FDA Noise Threshold:10 ·Scan Length:10um bipolar (6 sec) ·Extended Scan Length:1000 μm ·FDA Res:High 2G

[0062] (Analysis conditions) ·Removed:Plane ·Data Fill:Off ·Data Fill Max:25 ·Filter:Off ·Filter Trim:Off ·Min Area Size:0 ·Remove spikes: Off

[0063] Next, the manufacturing method of the sheet 10 will be described with reference to FIGS. 7 to 13. The manufacturing method of the sheet 10 includes a base material preparation step and a resin layer formation step.

[0064] First, the base material preparation step is performed. In the base material preparation step, as shown in FIG. 7, the base material 20 is prepared. As described above, the base material 20 includes a first base material surface 21 and a second base material surface 22.

[0065] Next, a resin layer forming step is performed. In the resin layer forming step, a resin layer 30 is formed on the first substrate surface 21 of the substrate 20. Note that a primer layer may be formed on the first substrate surface 21 of the substrate 20, and the resin layer 30 may be formed on the primer layer. The resin layer 30 may be formed by an imprint method. For example, the resin layer forming step may include a resin composition coating step and a resin layer shaping step. In the resin layer forming step, first, the resin composition coating step may be performed, and then the resin layer shaping step may be performed.

[0066] In the resin composition coating step, as shown in FIG. 8, a resin composition 50 is applied onto the first substrate surface 21 of the substrate 20. The resin composition 50 is a radiation curable resin composition. The radiation curable resin composition is a resin composition that cures when irradiated with radiation.

[0067] In the resin layer shaping step, the resin layer 30 is shaped using a mold 60. More specifically, first, as shown in FIG. 9, the mold 60 is prepared. The mold 60 includes a mold surface 61. The mold surface 61 may include a function forming portion 62 and a mold recess 63. That is, the function forming portion 62 and the mold recess 63 may be formed on the mold surface 61.

[0068] The function forming portion 62 is a portion for forming the functional portion 35. When the functional portion 35 is configured by a concavo-convex pattern, the function forming portion 62 includes a concavo-convex pattern having a shape complementary to the concavo-convex pattern of the functional portion 35. The mold surface 61 may include a plurality of function forming portions 62 so as to correspond to the plurality of function forming portions 62.

[0069] The mold recess 63 is the part that forms the convex part 40. The mold surface 61 may include a plurality of mold recesses 63 so as to correspond to the plurality of convex parts 40. As shown in FIG. 10, the mold recess 63 may include a mold depression 64. The mold recess 63 may be constituted by the mold depression 64. The mold depression 64 is the part that forms the two top parts 41 and the depression part 42. The mold depression 64 is recessed from the mold surface 61.

[0070] As shown in FIG. 10, the mold surface 61 may include a mold convex part 65. The mold convex part 65 is the part that forms the recess 45. The mold convex part 65 is adjacent to the mold recess 63. The mold convex part 65 protrudes from the mold surface 61. The mold convex part 65 has a shape complementary to the recess 45.

[0071] Next, as shown in FIGS. 11 and 12, the mold surface 61 of the mold 60 is brought into contact with and pressed against the resin composition 50 on the base material 20. As a result, the shape of the functional formation part 62 of the mold 60 is transferred to the resin composition 50, and the functional part 35 is formed in the resin composition 50. Further, the shape of the mold recess 63 is transferred to the resin composition 50, and the convex part 40 is formed in the resin composition 50. Further, the shape of the mold convex part 65 is transferred to the resin composition 50, and the recess 45 is formed in the resin composition 50. Then, the resin composition 50 is cured by irradiating the resin composition 50 with ionizing radiation. In this way, a resin layer 30 including the functional part 35, the convex part 40, and the recess 45 is formed on the first base material surface 21 of the base material 20.

[0072] As shown in FIG. 12, when the mold surface 61 is brought into contact with and pressed against the resin composition 50, the resin composition 50 spreads by wetting into the mold depression 64 of the mold recess 63 due to surface tension. Here, before the resin composition 50 spreads to the central part of the mold depression 64, the resin composition 50 is irradiated with ionizing radiation to cure the resin composition 50. As a result, a space is formed in the central part of the mold depression 64, and as shown in FIG. 12, in a cross-sectional view, a convex part 40 including the two top parts 41 and the depression part 42 located between the two top parts 41 is formed.

[0073] Thereafter, as shown in FIG. 13, the mold 60 is separated from the resin layer 30. In this way, the sheet 10 including the base material 20 and the resin layer 30 is obtained.

[0074] As shown in FIG. 1, the sheet 10 thus obtained is wound around, for example, a winding core 3 and stored and transported as a roll sheet 1. FIG. 14 is a cross-sectional view showing a state in which the sheets 10 of FIG. 2 are laminated. As shown in FIG. 14, in the roll sheet 1, the sheets 10 are laminated in the Z direction.

[0075] Generally, in a state where sheets are laminated, the first surface of a sheet contacts the second surface of the sheet. For this reason, a problem (blocking) may occur in which the first surface of the sheet sticks to the second surface of the sheet. As a countermeasure against this, it is conceivable to provide convex portions (narrowing) on the sheet. However, in this case, in a state where the sheets are laminated, since the convex portions contact the second surface of the sheet, concave portions corresponding to the convex portions may be formed on the second surface of the sheet. For this reason, a problem may occur in which the convex portions damage the sheet.

[0076] On the other hand, according to the present embodiment, the first surface 11 includes the convex portions 40 in the second region 14. As a result, in a state where the sheets 10 are laminated, the convex portions 40 contact the second surface 12 of the sheet 10. For this reason, it is possible to suppress the first surface 11 of the sheet 10 from contacting the second surface 12 of the sheet 10 in the first region 13. As a result, it is possible to suppress the first surface 11 of the sheet 10 from sticking to the second surface 12 of the sheet 10.

[0077] In particular, according to the present embodiment, the convex portion 40 includes, in a cross-sectional view, two top portions 41 and a recessed portion 42 located between the two top portions 41. As a result, when the convex portion 40 comes into contact with the second surface 12 of the sheet 10 in a state where the sheets 10 are stacked, it is possible to avoid the top portion 41 from coming into contact with the second surface 12 and the portion corresponding to the recessed portion 42 from coming into contact with the second surface 12. For this reason, the contact area between the convex portion 40 and the sheet 10 can be reduced. As a result, it is possible to suppress the convex portion 40 from sticking to the second surface 12 of the sheet 10.

[0078] Furthermore, according to the present embodiment, in a state where the sheets 10 are stacked, the two top portions 41 come into contact with the second surface 12 of the sheet 10. As a result, the load applied to the second surface 12 of the sheet 10 by the convex portion 40 is dispersed, and the pressure acting on the second surface 12 of the sheet 10 can be reduced. For this reason, it is possible to suppress the formation of a concave portion corresponding to the convex portion 40 on the second surface 12 of the sheet 10. As a result, it is possible to suppress the convex portion 40 from damaging the sheet 10.

[0079] As described above, according to the present embodiment, it is possible to suppress both blocking and damage to the sheet 10.

[0080] The above-described embodiment can be variously modified. Hereinafter, modifications will be described with reference to the drawings as necessary. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding portions in the above-described embodiment are used for portions that can be configured in the same manner as the above-described embodiment. Redundant descriptions are omitted. Further, when it is clear that the operational effects obtained in the above-described embodiment can also be obtained in the modification, the description thereof may be omitted.

[0081] FIG. 15 is a cross-sectional view showing a modification of the sheet 10 in FIG. 2. As shown in FIG. 15, the sheet 10 may include a base material 20, a resin layer 30, and a surface layer 70 in this order from the second surface 12 toward the first surface 11. In this case, the base material 20 constitutes the second surface 12 of the sheet 10, and the surface layer 70 constitutes the first surface 11 of the sheet 10.

[0082] The surface layer 70 is located on the resin layer 30. More specifically, the surface layer 70 is located on the first resin surface 31. The surface layer 70 includes a first surface 71 and a second surface 72. The first surface 71 constitutes the first surface 11 of the sheet 10. The second surface 72 is located on the side opposite to the first surface 71. The second surface 72 faces the first resin surface 31. The second surface 72 may be in contact with the first resin surface 31.

[0083] Similar to the resin layer 30, the surface layer 70 may also contain a cured product of a radiation-curable resin composition. The thickness of the surface layer 70 is, for example, 0.5 μm or more, may be 1 μm or more, and may be 2 μm or more. The thickness of the surface layer 70 is, for example, 20 μm or less, may be 15 μm or less, and may be 10 μm or less.

[0084] The surface layer 70 may have a specific function. The function may include at least any one of an optical function, a hard coat function, an antifouling function, and a scratch-resistant function. Examples of the optical function include a low reflection function, an antiglare function, a light diffusion function, a light reflection function, a light absorption function, a light diffraction function, and the like.

[0085] FIG. 16 is a cross-sectional view showing an enlarged view of the periphery of the convex portion 40 of the sheet 10 in FIG. 15. As shown in FIGS. 15 and 16, the surface layer 70 may include the convex portion 40. The surface layer 70 may include a plurality of convex portions 40. Also, as shown in FIGS. 15 and 16, the resin layer 30 may include a resin convex portion 80. More specifically, the first resin surface 31 may include the resin convex portion 80. The first resin surface 31 may include a plurality of resin convex portions 80.

[0086] As shown in FIG. 16, the resin convex portion 80 includes, in a cross-sectional view, two resin tops 81, and a resin depression 82. The resin top 81 is a portion protruding in the Z direction from the first resin surface 31. The resin depression 82 is a portion recessed in the Z direction from the resin top 81. The resin depression 82 is located between the two resin tops 81. The configuration of the resin top 81 is the same as the configuration of the top 41. The configuration of the resin depression 82 is the same as the configuration of the depression 42.

[0087] As shown in FIG. 16, the resin layer 30 may include a resin recess 85. More specifically, the first resin surface 31 may include the resin recess 85. The first resin surface 31 may include a plurality of resin recesses 85. The resin recess 85 is a portion that is recessed in the Z direction from the first resin surface 31. The resin recess 85 is adjacent to the resin protrusion 80. The configuration of the resin recess 85 is the same as the configuration of the recess 45.

[0088] The resin protrusion 80 may be positioned to correspond to the protrusion 40. The protrusion 40 may face the resin protrusion 80 in the Z direction. That is, the protrusion 40 may at least partially overlap the resin protrusion 80 in plan view. In particular, the recess 42 may face the resin recess 82 in the Z direction. That is, the recess 42 may at least partially overlap the resin recess 82 in plan view.

[0089] The resin protrusion 80 may have a size different from that of the protrusion 40. For example, the height h4 of the resin top 81 may be higher than the height h1 of the top 41. In other words, the height h1 of the top 41 may be lower than the height h4 of the resin top 81. The height h4 of the resin top 81 is the height based on the first resin surface 31.

[0090] Also, for example, the distance L3 between two resin tops 81 may be smaller than the distance L2 between two tops 41. In other words, the distance L2 between two tops 41 may be larger than the distance L3 between two resin tops 81. The distance L3 between two resin tops 81 is the distance in the X direction between the vertices of two resin tops 81. The ratio L3 / L2 of the distance L3 to the distance L2 may be, for example, 0.6 or more, may be 0.7 or more, and may be 0.8 or more. The ratio L3 / L2 of the distance L3 to the distance L2 may be, for example, 1 or less, may be 0.95 or less, and may be 0.9 or less.

[0091] Also, for example, the depth h5 of the resin recess 82 may be deeper than the depth h2 of the recess 42. In other words, the depth h2 of the recess 42 may be shallower than the depth h5 of the resin recess 82. The depth h5 of the resin recess 82 is the depth based on the apex of the resin top 81.

[0092] The resin recess 85 may also have a size different from that of the recess 45. For example, the depth h6 of the resin recess 85 may be deeper than the depth h3 of the recess 45. In other words, the depth h3 of the recess 45 may be shallower than the depth h6 of the resin recess 85. The depth h6 of the resin recess 85 is the depth based on the first resin surface 31.

[0093] As described above, by forming the resin layer 30 by the imprint method, the resin protrusion 80 and the resin recess 85 may be formed on the first resin surface 31. The surface layer 70 may be formed by applying the radiation-curable resin composition of the surface layer 70 onto the first resin surface 31 of the resin layer 30 and irradiating it with radiation to cure it. As a result, the shape of the first surface 71 of the surface layer 70 follows the shape of the first resin surface 31 of the resin layer 30, and the protrusion 40 is formed at a position corresponding to the resin protrusion 80 of the first surface 71, and the recess 45 is formed at a position corresponding to the resin recess 85 of the first surface 71.

[0094] FIG. 17 is a schematic diagram showing a sheet laminate 100 according to an embodiment. As shown in FIG. 17, a plurality of single-sheet-like sheets 10 may be laminated to form the sheet laminate 100. That is, the sheet laminate 100 includes a plurality of sheets 10 laminated in the Z direction. The sheet 10 may be stored and transported as a sheet laminate 100 in which a plurality of sheets are laminated.

[0095] In this case, the sheet 10 may have a rectangular shape in plan view. The length of one side of the sheet 10 is, for example, 0.05 m or more, may be 0.3 m or more, and may be 1 m or more. The length of one side of the sheet 10 is, for example, 3 m or less, may be 1 m or less, and may be 0.5 m or less.

[0096] Generally, in a sheet laminate as well as in the case of a roll sheet, a blocking problem may occur. Further, when convex portions are provided on the sheet for countermeasures against blocking, a problem may occur in that the convex portions damage the sheet. Also in the present embodiment, the first surface 11 includes convex portions 40 in the second region 14, and the convex portions 40 include, in a sectional view, two top portions 41 and a recessed portion 42 positioned between the two top portions 41. Thereby, while suppressing blocking, damage to the sheet 10 can also be suppressed.

[0097] FIG. 18 is a plan view showing an enlarged part of the sheet 10 in FIG. 17. Especially when the sheet 10 constitutes the sheet laminate 100 as described above, each of the first regions 13 of the sheet 10 may be surrounded by the convex portions 40. For example, as shown in FIG. 18, the plurality of convex portions 40 may be arranged in a rectangular outline shape. Each of the first regions 13 may be surrounded by the plurality of convex portions 40 arranged in a rectangular outline shape. Although omitted in the drawing, in FIG. 18, each of the convex portions 40 may be formed in a dot shape. By each of the first regions 13 being surrounded by the convex portions 40 in this way, blocking can be suppressed more effectively. Also when the sheet 10 constitutes the roll sheet 1 as described above, each of the first regions 13 may be surrounded by the convex portions 40.

[0098] FIG. 19 is a plan view of the sheet in FIG. 17. In the case where each of the first regions 13 is surrounded by the plurality of convex portions 40 arranged in a rectangular outline shape, as shown in FIG. 19, the plurality of convex portions 40 may be arranged in a grid pattern. That is, the plurality of convex portions 40 may include a plurality of convex portions 40a arranged along the X direction and a plurality of convex portions 40b arranged along the Y direction. Each of the first regions 13 may be positioned between the convex portions 40a in the X direction and between the convex portions 40b in the Y direction. Although omitted in the drawing, in FIG. 19, each of the plurality of convex portions 40 (40a, 40b) may be formed in a dot shape.

[0099] FIG. 20 is a modified example of FIG. 18. FIG. 21 is another modified example of FIG. 18. When each of the first regions 13 is surrounded by the convex portions 40, as shown in FIG. 20, the plurality of convex portions 40 may be arranged in a circular contour. Also, as shown in FIG. 21, the plurality of convex portions 40 may be arranged in a triangular contour. Although not shown in the figure, in FIGS. 20 and 21, each of the convex portions 40 may be formed in a dot shape. Thus, when each of the first regions 13 is surrounded by the convex portions 40, the arrangement of the convex portions 40 is arbitrary.

[0100] FIG. 22 is a modified example of FIG. 4. FIG. 23 is another modified example of FIG. 4. As shown in FIGS. 22 and 23, the convex portion 40 may be formed linearly along the Y direction. For example, as shown in FIG. 22, the convex portion 40 may have an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in a plan view. Also, as shown in FIG. 23, the convex portion 40 may be formed to extend straight in the Y direction. The convex portion 40 may extend from the end of the first side in the Y direction of the sheet 10 to the end of the second side in the Y direction of the sheet 10. Thus, the planar shape of the convex portion 40 is arbitrary.

[0101] FIG. 24 is a modified example of FIG. 10. FIG. 25 is a modified example of FIG. 12. As shown in FIG. 24, the mold recess 63 may include, in a cross-sectional view, two mold depression portions 67 and a mold top portion 68. The mold recess 63 may be composed of two mold depression portions 67 and a mold top portion 68. The mold depression portion 67 is a portion that forms the top portion 41. The mold depression portion 67 is recessed from the mold surface 61. The mold depression portion 67 has a shape complementary to the top portion 41. The mold top portion 68 is a portion that forms the depression portion 42. The mold top portion 68 is located between the two mold depression portions 67. The mold top portion 68 has a shape complementary to the depression portion 42. Thus, the mold recess 63 may have a shape complementary to the convex portion 40. Even when such a mold 60 is used, as shown in FIG. 25, a convex portion 40 including two top portions 41 and a depression portion 42 located between the two top portions 41 can be formed in the resin composition 50. Therefore, a resin layer 30 including the convex portion 40 can be formed on the first substrate surface 21 of the substrate 20.

[0102] Each component disclosed in the above-described embodiments and the above-described modified examples may be appropriately combined as necessary.

Example

[0103] Next, the embodiments of the present disclosure will be described more specifically with reference to examples. The embodiments of the present disclosure are not limited to the descriptions of the following examples as long as the gist thereof is not exceeded.

[0104] (Example 1) As Example 1, a roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll to form the roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the transverse dimension of the sheet 10 was 0.65 m. The base material 20 was made of a cycloolefin polymer (COP, trade name "Zeonoa" of Nippon Zeon Co., Ltd.). The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer with the following formulation on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition with the following formulation on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 It was. The thickness of the resin layer 30 was 2.2 μm.

[0105] <Coating liquid for forming primer layer> · Polyolefin resin: 70 parts by mass (Manufactured by Mitsubishi Chemical Corporation, trade name: Surflen P-1000) · Silica-based lubricant: 5 parts by mass (Manufactured by CIK Nanotech Co., Ltd., trade name: SIRMIBK15WT%-E65) · Methyl ethyl ketone: 25 parts by mass

[0106] <Ionizing radiation curable resin composition> · Dipentaerythritol hexaacrylate: 33 parts by mass (Manufactured by Nippon Kayaku Co., Ltd., trade name: PET-30) · Trimethylolpropane triacrylate: 33 parts by mass (Manufactured by Osaka Organic Chemical Industry Co., Ltd., trade name: Biscoat #295, TMPTA) · Photoinitiator: 4 parts by mass (Manufactured by IGM, product name: Omnirad184) · Methyl ethyl ketone: 30 parts by mass

[0107] In Example 1, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIGS. 5 and 6, the convex portion 40 included two top portions 41 and a recessed portion 42 in a cross-sectional view. The height h1 of the top portion 41 was 0.4 μm. The distance L2 between the two top portions 41 was 150 μm. The depth h2 of the recessed portion 42 was 1.2 μm.

[0108] (Example 2) As Example 2, the roll sheet 1 shown in FIG. 1 was manufactured. That is, a long sheet 10 was manufactured, and this sheet 10 was wound into a roll shape to obtain a roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 1.33 m. The base material 20 was made of an acrylic resin. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a primer layer-forming coating liquid similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation-curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 It was. The thickness of the resin layer 30 was 3.1 μm.

[0109] In Example 2, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIGS. 5 and 6, in a cross-sectional view, the convex portion 40 included two top portions 41 and a recessed portion 42. The height h1 of the top portion 41 was 0.7 μm. The distance L2 between the two top portions 41 was 200 μm. The depth h2 of the recessed portion 42 was 1.7 μm.

[0110] (Example 3) As Example 3, the roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll shape to obtain the roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 0.65 m. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying the same coating liquid for forming a primer layer as in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying the same ionizing radiation curable resin composition as in Example 1 on the primer layer, drying it with a dryer at 80° C. for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 2. The thickness of the resin layer 30 was 7.2 μm.

[0111] In Example 3, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed linearly. The convex portions 40 had an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in plan view. The ratio of the length of the major axis to the length of the minor axis of the convex portion 40 was about 3. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 between the convex portions 40 in the X direction (see FIG. 3) was 150 mm. The arrangement pitch p1 of the convex portions 40 in the Y direction (see FIG. 4) was 846 μm. Further, as shown in FIGS. 5 and 6, the convex portion 40 included two top portions 41 and a recessed portion 42 in cross-sectional view. The height h1 of the top portion 41 was 3.5 μm. The distance L2 between the two top portions 41 was 250 μm. The depth h2 of the recessed portion 42 was 0.3 μm.

[0112] (Example 4) As Example 4, the roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll shape to obtain the roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 0.65 m. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying the same coating liquid for forming a primer layer as in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying the same radiation-curable resin composition as in Example 1 on the primer layer, drying it with a dryer at 80° C. for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 and it was. The thickness of the resin layer 30 was 9.1 μm.

[0113] In Example 4, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 between the convex portions 40 in the X direction (see FIG. 3) was 150 mm. The arrangement pitch p1 of the convex portions 40 in the Y direction (see FIG. 4) was 846 μm. Further, as shown in FIGS. 5 and 6, in a cross-sectional view, the convex portion 40 included two top portions 41 and a recessed portion 42. The height h1 of the top portion 41 was 6.4 μm. The distance L2 between the two top portions 41 was 300 μm. The depth h2 of the recessed portion 42 was 0.1 μm.

[0114] (Example 5) As Example 5, a sheet laminate 100 shown in FIG. 17 was produced. That is, a plurality of sheet-like sheets 10 were produced and laminated to form the sheet laminate 100. In this sheet laminate 100, the sheet 10 had a square shape in a plan view, and the length of one side of the sheet 10 was 0.15 m. In the sheet laminate 100, 100 sheets 10 were laminated. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying a radiation-curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80°C for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 It was. The thickness of the resin layer 30 was 2.2 μm.

[0115] In Example 5, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed linearly. The convex portions 40 had an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in plan view. The ratio of the length of the major axis to the length of the minor axis of the convex portion 40 was about 3. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIGS. 5 and 6, the convex portion 40 included two top portions 41 and a recessed portion 42 in cross-sectional view. The height h1 of the top portion 41 was 0.7 μm. The distance L2 between the two top portions 41 was 200 μm. The depth h2 of the recessed portion 42 was 1.8 μm.

[0116] (Example 6) As Example 6, a sheet laminate 100 shown in FIG. 17 was produced. That is, a plurality of sheet-like sheets 10 were produced and laminated to form a sheet laminate 100. In this sheet laminate 100, the sheet 10 had a square shape in plan view, and the length of one side of the sheet 10 was 0.15 m. In the sheet laminate 100, 100 sheets 10 were laminated. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was one layer. That is, as shown in FIG. 2, the sheet 10 was composed of the base material 20 and the resin layer 30. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying a radiation-curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80 ° C. for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 and was. The thickness of the resin layer 30 was 7.4 μm.

[0117] In Example 6, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed linearly. The convex portions 40 had an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in a plan view. The ratio of the length of the major axis to the length of the minor axis of the convex portion 40 was about 3. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIGS. 5 and 6, the convex portion 40 included two top portions 41 and a recessed portion 42 in a cross-sectional view. The height h1 of the top portion 41 was 4.3 μm. The distance L2 between the two top portions 41 was 240 μm. The depth h2 of the recessed portion 42 was 0.2 μm.

[0118] (Example 7) As Example 7, the roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll shape to obtain the roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 0.65 m. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was two layers. That is, as shown in FIG. 15, the sheet 10 was composed of the base material 20, the resin layer 30, and the surface layer 70. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying a radiation-curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80° C. for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2It was. The thickness of the resin layer 30 was 2.1 μm. The surface layer 70 was composed of a liquid crystal layer (retardation layer). The surface layer 70 was formed by applying a coating solution for forming a liquid crystal layer having the following composition on the resin layer 30, drying it, and then irradiating it with ultraviolet rays. The integrated light quantity of the ultraviolet rays was 150 mJ / cm 2 It was. The liquid crystal layer used a liquid crystal with an in-plane birefringence (Δn) of 0.15, and the film thickness was adjusted so that the in-plane retardation was 275 nm. The thickness of the surface layer 70 was 3.0 μm. The total thickness of the resin layer 30 and the surface layer 70 was 5.1 μm.

[0119] <Coating solution for forming liquid crystal layer> ·Surfactant: 0.04 parts by mass (BYK-361N (trade name), manufactured by BYK Chemie GmbH) ·Rod-shaped liquid crystal molecules: 10 parts by mass (LC242 (trade name), manufactured by BASF SE, in-plane birefringence (Δn) = 0.15) ·Photoinitiator: 0.4 parts by mass (manufactured by IGM Resins B.V., trade name: Omnirad 184) ·Methyl ethyl ketone: 89.6 parts by mass

[0120] In Example 7, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 between the convex portions 40 in the X direction (see FIG. 3) was 150 mm. The arrangement pitch p1 of the convex portions 40 in the Y direction (see FIG. 4) was 846 μm. Further, as shown in FIG. 16, the convex portion 40 included two top portions 41 and a recessed portion 42 in a cross-sectional view. The height h1 of the top portion 41 was 0.08 μm. The distance L2 between the two top portions 41 was 250 μm. The depth h2 of the recessed portion 42 was 0.08 μm. Further, as shown in FIGS. 15 and 16, a plurality of resin recesses 85 were formed on the first resin surface 31. The resin convex portion 80 included two resin top portions 81 and a resin recessed portion 82 in a cross-sectional view. The distance L3 between the two resin top portions 81 was 200 μm. Therefore, the ratio L3 / L2 of the distance L3 to the distance L2 was 0.8.

[0121] (Example 8) As Example 8, the roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll to form the roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 1.33 m. The base material 20 was made of an acrylic resin. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was two layers. That is, as shown in FIG. 15, the sheet 10 was composed of a base material 20, a resin layer 30, and a surface layer 70. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80°C for 60 seconds, and then, simultaneously with shaping, irradiating ultraviolet rays from the side of the base material 20 to cure it. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 . The thickness of the resin layer 30 was 3.2 μm. The surface layer 70 was composed of a liquid crystal layer (retardation layer). The surface layer 70 was formed by applying a coating liquid for forming a liquid crystal layer similar to that in Example 7 on the resin layer 30, drying it, and then irradiating it with ultraviolet rays. The integrated light quantity of the ultraviolet rays was 150 mJ / cm 2 . The liquid crystal layer used a liquid crystal with an in-plane birefringence (Δn) of 0.15, and the film thickness was adjusted so that the in-plane retardation was 275 nm. The thickness of the surface layer 70 was 5.1 μm. The total thickness of the resin layer 30 and the surface layer 70 was 8.3 μm.

[0122] In Example 8, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIG. 16, the convex portion 40 included two top portions 41 and a recessed portion 42 in a cross-sectional view. The height h1 of the top portion 41 was 4.3 μm. The distance L2 between the two top portions 41 was 235 μm. The depth h2 of the recessed portion 42 was 0.1 μm. Further, as shown in FIGS. 15 and 16, a plurality of resin recessed portions 85 were formed on the first resin surface 31. The resin convex portion 80 included two resin top portions 81 and a resin recessed portion 82 in a cross-sectional view. The distance L3 between the two resin top portions 81 was 210 μm. Therefore, the ratio L3 / L2 of the distance L3 to the distance L2 was 0.89.

[0123] (Example 9) As Example 9, the roll sheet 1 shown in FIG. 1 was produced. That is, a long sheet 10 was produced, and this sheet 10 was wound into a roll shape to obtain a roll sheet 1. In this roll sheet 1, the longitudinal dimension of the sheet 10 was 2000 m, and the lateral dimension of the sheet 10 was 0.65 m. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was two layers. That is, as shown in FIG. 15, the sheet 10 was composed of a base material 20, a resin layer 30, and a surface layer 70. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80°C for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2It was. The thickness of the resin layer 30 was 7.4 μm. The surface layer 70 was composed of a liquid crystal layer (retardation layer). The surface layer 70 was formed by applying a coating liquid for forming a liquid crystal layer similar to that of Example 7 on the resin layer 30, drying it, and then irradiating it with ultraviolet rays. The integrated light amount of the ultraviolet rays was 150 mJ / cm 2 It was. The liquid crystal layer used a liquid crystal with an in-plane birefringence (Δn) of 0.15, and the film thickness was adjusted so that the in-plane retardation was 275 nm. The thickness of the surface layer 70 was 3.5 μm. The total thickness of the resin layer 30 and the surface layer 70 was 10.9 μm.

[0124] In Example 9, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed linearly. The convex portions 40 had an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in plan view. The ratio of the length of the major axis to the length of the minor axis of the convex portions 40 was about 3. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 between the convex portions 40 in the X direction (see FIG. 3) was 150 mm. The arrangement pitch p1 of the convex portions 40 in the Y direction (see FIG. 4) was 846 μm. Further, as shown in FIG. 16, the convex portions 40 included two top portions 41 and a recessed portion 42 in cross-sectional view. The height h1 of the top portion 41 was 6.5 μm. The distance L2 between the two top portions 41 was 260 μm. The depth h2 of the recessed portion 42 was 0.05 μm. Also, as shown in FIGS. 15 and 16, a plurality of resin recesses 85 were formed on the first resin surface 31. The resin convex portion 80 included two resin top portions 81 and a resin recessed portion 82 in cross-sectional view. The distance L3 between the two resin top portions 81 was 230 μm. Therefore, the ratio L3 / L2 of the distance L3 to the distance L2 was 0.88.

[0125] (Example 10) As Example 10, a sheet laminate 100 shown in FIG. 17 was produced. That is, a plurality of sheet-like sheets 10 were produced and laminated to form a sheet laminate 100. In this sheet laminate 100, the sheet 10 had a square shape in plan view, and the length of one side of the sheet 10 was 0.15 m. In the sheet laminate 100, 100 sheets 10 were laminated. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was two layers. That is, as shown in FIG. 15, the sheet 10 was composed of a base material 20, a resin layer 30, and a surface layer 70. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light amount of the ultraviolet rays was 500 mJ / cm 2 2. The thickness of the resin layer 30 was 2.2 μm. The surface layer 70 was composed of a liquid crystal layer (retardation layer). The surface layer 70 was formed by applying a coating liquid for forming a liquid crystal layer similar to that in Example 7 on the resin layer 30, drying it, and then irradiating ultraviolet rays. The integrated light amount of the ultraviolet rays was 150 mJ / cm 2 2. The liquid crystal layer used a liquid crystal with an in-plane birefringence (Δn) of 0.15, and the film thickness was adjusted so that the in-plane retardation was 275 nm. The thickness of the surface layer 70 was 6.1 μm. The total thickness of the resin layer 30 and the surface layer 70 was 8.3 μm.

[0126] In Example 10, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a dot shape. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIG. 16, the convex portion 40 included two top portions 41 and a recessed portion 42 in a cross-sectional view. The height h1 of the top portion 41 was 4.9 μm. The distance L2 between the two top portions 41 was 230 μm. The depth h2 of the recessed portion 42 was 0.02 μm. Further, as shown in FIGS. 15 and 16, a plurality of resin recessed portions 85 were formed on the first resin surface 31. The resin convex portion 80 included two resin top portions 81 and a resin recessed portion 82 in a cross-sectional view. The distance L3 between the two resin top portions 81 was 180 μm. Therefore, the ratio L3 / L2 of the distance L3 to the distance L2 was 0.78.

[0127] (Example 11) As Example 11, a sheet laminate 100 shown in FIG. 17 was produced. That is, a plurality of sheet-like sheets 10 were produced and laminated to form a sheet laminate 100. In this sheet laminate 100, the sheet 10 had a square shape in plan view, and the length of one side of the sheet 10 was 0.15 m. In the sheet laminate 100, 100 sheets 10 were laminated. The base material 20 was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material 20 was two layers. That is, as shown in FIG. 15, the sheet 10 was composed of a base material 20, a resin layer 30, and a surface layer 70. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 was. The thickness of the resin layer 30 was 7.4 μm. The surface layer 70 was composed of a liquid crystal layer (retardation layer). The surface layer 70 was formed by applying a coating liquid for forming a liquid crystal layer similar to that in Example 7 on the resin layer 30 and drying it, and then irradiating ultraviolet rays. The integrated light quantity of the ultraviolet rays was 150 mJ / cm 2 was. The liquid crystal layer used a liquid crystal with an in-plane birefringence (Δn) of 0.15, and the film thickness was adjusted so that the in-plane retardation was 275 nm. The thickness of the surface layer 70 was 3.5 μm. The total thickness of the resin layer 30 and the surface layer 70 was 10.9 μm.

[0128] In Example 11, as shown in FIGS. 3 and 4, a plurality of convex portions 40 were arranged on the first surface 11 of the sheet 10. The convex portions 40 were formed in a linear shape. The convex portions 40 had an elliptical shape having a minor axis in the X direction and a major axis in the Y direction in plan view. The ratio of the length of the major axis to the length of the minor axis of the convex portion 40 was about 3. The plurality of convex portions 40 were arranged in a straight line along the Y direction. The distance L1 (see FIG. 3) between the convex portions 40 in the X direction was 150 mm. The arrangement pitch p1 (see FIG. 4) of the convex portions 40 in the Y direction was 846 μm. Further, as shown in FIG. 16, the convex portion 40 included two tops 41 and a recessed portion 42 in cross section. The height h1 of the top 41 was 7.2 μm. The distance L2 between the two tops 41 was 270 μm. The depth h2 of the recessed portion 42 was 0.01 μm. Further, as shown in FIGS. 15 and 16, a plurality of resin recessed portions 85 were formed on the first resin surface 31. The resin convex portion 80 included two resin tops 81 and a resin recessed portion 82 in cross section. The distance L3 between the two resin tops 81 was 230 μm. Therefore, the ratio L3 / L2 of the distance L3 to the distance L2 was 0.85.

[0129] (Comparative Example 1) As Comparative Example 1, a roll sheet was produced. That is, a long sheet was produced, and this sheet was wound into a roll shape to obtain a roll sheet. In this roll sheet, the longitudinal dimension of the sheet was 2000 m, and the lateral dimension of the sheet was 0.65 m. The base material of the sheet was composed of the same cycloolefin polymer (COP) as in Example 1. The layer structure on the base material was one layer. That is, the sheet was composed of a base material and a resin layer. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a primer layer forming coating solution similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying a radiation-curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80° C. for 60 seconds, and then irradiating ultraviolet rays from the base material 20 side for curing simultaneously with shaping. The integrated light amount of the ultraviolet rays was 500 mJ / cm2 It was. The thickness of the resin layer was 7.5 μm.

[0130] In Comparative Example 1, a plurality of convex portions were arranged on the first surface of the sheet. The convex portions were formed in a conical shape. The plurality of convex portions were arranged in a straight line along the Y direction. The distance between the convex portions in the X direction was 150 mm. The arrangement pitch of the convex portions in the Y direction was 846 μm. The diameter of the bottom surface of the cone of the convex portion was 400 μm. The height of the cone of the convex portion was 5.2 μm.

[0131] (Comparative Example 2) As Comparative Example 2, a roll sheet was produced. That is, a long sheet was produced, and this sheet was wound into a roll shape to obtain a roll sheet. In this roll sheet, the longitudinal dimension of the sheet was 2000 m, and the lateral dimension of the sheet was 0.65 m. The base material of the sheet was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material was one layer. That is, the sheet was composed of the base material and the resin layer. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying a coating liquid for forming a primer layer similar to that in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying an ionizing radiation curable resin composition similar to that in Example 1 on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 It was. The thickness of the resin layer was 3.5 μm.

[0132] In Comparative Example 2, a plurality of convex portions were arranged on the first surface of the sheet. The convex portions were formed in a hemispherical shape. The plurality of convex portions were arranged in a straight line along the Y direction. The distance between the convex portions in the X direction was 150 mm. The arrangement pitch of the convex portions in the Y direction was 846 μm. The diameter of the hemisphere of the convex portion was 0.85 μm.

[0133] (Comparative Example 3) As Comparative Example 3, a roll sheet was produced. That is, a long sheet was produced and this sheet was wound into a roll to form a roll sheet. In this roll sheet, the longitudinal dimension of the sheet was 2000 m and the transverse dimension of the sheet was 0.65 m. The base material of the sheet was composed of the same cycloolefin polymer (COP) as in Example 1. The thickness of the base material 20 was 40 μm. The layer structure on the base material was one layer. That is, the sheet was composed of the base material and the resin layer. A primer layer was provided between the base material 20 and the resin layer 30. The primer layer was formed by applying the same coating liquid for forming a primer layer as in Example 1 on the base material 20 and drying it. The thickness of the primer layer was 0.5 μm. The resin layer 30 was formed by applying the same radiation-curable resin composition as in Example 1 on the primer layer, drying it with a dryer at 80 °C for 60 seconds, and then irradiating ultraviolet rays from the side of the base material 20 for curing simultaneously with shaping. The integrated light quantity of the ultraviolet rays was 500 mJ / cm 2 It was. The thickness of the resin layer was 2.2 μm.

[0134] In Comparative Example 3, a plurality of convex portions were arranged on the first surface of the sheet. The convex portions were formed in a frustum of a cone shape. The plurality of convex portions were arranged in a straight line along the Y direction. The distance between the convex portions in the X direction was 150 mm. The arrangement pitch of the convex portions in the Y direction was 846 μm. The diameter of the bottom surface of the frustum of the cone of the convex portion was 400 μm. The diameter of the upper surface of the frustum of the cone of the convex portion was 200 μm. The height of the frustum of the cone of the convex portion was 0.5 μm.

[0135] Regarding the above Examples 1 to 11 and Comparative Examples 1 to 3, evaluation of sticking of sheets (blocking evaluation) and evaluation of damage to the sheet by the convex portions were performed.

[0136] Figure 26 is a table showing the evaluation results of each example and each comparative example. In the item of "Adhesion Evaluation" shown in Figure 26, "○" indicates that no adhesion occurred between the sheets, "△" indicates that slight adhesion occurred between the sheets, and "×" indicates that significant adhesion occurred between the sheets. In the item of "Damage Evaluation" shown in Figure 26, "○" indicates that no concave damage was observed on the second surface of the sheet due to the convex portion, and "×" indicates that a concave damage was observed on the second surface of the sheet due to the convex portion. When the sheet constitutes a roll sheet, the confirmation of the concave damage of the sheet was performed at a position wound 5 m from the start of winding around the core. When the sheet constitutes a sheet laminate, the confirmation of the concave damage of the sheet was performed on the second surface of the second sheet from the bottom. At this time, the load applied to the bottom sheet was 20 kgf.

[0137] As shown in Figure 26, in Examples 1 to 11 and Comparative Examples 1 and 2, adhesion (blocking) between the sheets could be suppressed. In particular, in Examples 2 to 4, 6, 8, 9, 11 and Comparative Example 1, no adhesion occurred between the sheets. Further, in Examples 1 to 11 and Comparative Example 3, no damage to the sheet was observed. Therefore, in Examples 1 to 11, while suppressing blocking, damage to the sheet could also be suppressed.

Explanation of Reference Signs

[0138] 1 Roll sheet 10 Sheet 11 First surface 12 Second surface 13 First region 14 Second region 20 Base material 30 Resin layer 40 Convex portion 41 Top 42 Depressed portion 45 Concave portion 70 Surface layer 80 Resin convex portion 81 Resin top 82 Resin depressed portion 100 Sheet laminate

Claims

1. A sheet including a first surface and a second surface, comprising a first region and a second region, wherein the first region has a function, wherein the first surface includes convex portions in the second region, wherein the convex portions include, in a cross-sectional view, two tops and a recessed portion located between the two tops, the sheet.

2. The sheet according to claim 1, wherein the function includes at least any one of an optical function, a hard coat function, an antifouling function, and a scratch-resistant function.

3. The first surface includes two of the convex portions, The sheet according to claim 1, wherein the first region is located between the two convex portions.

4. The sheet according to claim 1, wherein the convex portions are formed in a dot shape.

5. The tops are formed in a circumferential shape, The sheet according to claim 4, wherein the recessed portion is surrounded by the tops.

6. The sheet has a longitudinal direction and a lateral direction, The first surface includes a plurality of the convex portions, The sheet according to claim 3, wherein the plurality of convex portions are arranged along the longitudinal direction.

7. The sheet has a longitudinal direction and a lateral direction, The sheet according to claim 1, wherein the convex portions are linearly formed along the longitudinal direction.

8. The sheet according to claim 1, wherein the depth of the recessed portion is deeper than the height of the tops.

9. The sheet according to claim 1, wherein the first surface includes recessed portions adjacent to the convex portions in the second region.

10. The first surface includes two of the recessed portions in a cross-sectional view, The sheet according to claim 9, wherein the convex portion is located between the two recessed portions.

11. The sheet includes a base material and a resin layer in this order from the second surface toward the first surface, wherein the resin layer constitutes the first surface, The sheet according to claim 1, wherein the resin layer includes the convex portions.

12. The sheet according to claim 11, wherein the resin layer includes a cured product of a radiation-curable resin composition.

13. The sheet includes a base material, a resin layer, and a surface layer in this order from the second surface toward the first surface, wherein the surface layer constitutes the first surface, The sheet according to claim 1, wherein the surface layer includes the convex portions.

14. The resin layer includes resin convex portions, wherein the resin convex portions include, in a cross-sectional view, two resin tops and a resin recessed portion located between the two resin tops, The sheet according to claim 13, wherein the recessed portion faces the resin recessed portion in the thickness direction.

15. The sheet according to claim 13, wherein the resin layer contains a cured product of a radiation curable resin composition.

16. The sheet has a longitudinal direction and a lateral direction, The sheet includes a plurality of first regions, The sheet according to claim 1, wherein the plurality of first regions are arranged along the longitudinal direction and are also arranged along the lateral direction.

17. The first surface includes the plurality of convex portions, The sheet according to claim 16, wherein each of the first regions is located between two of the convex portions.

18. The sheet according to claim 16, wherein each of the first regions is surrounded by the convex portions.

19. A roll sheet in which the sheet according to any one of claims 1 to 18 is wound in a roll shape.

20. A sheet laminate in which a plurality of the sheets according to any one of claims 1 to 18 are laminated.

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