Roll package

Abstract

The invention provides a roll package capable of suppressing generation of wrinkles in an intermediate film. This roll package is provided with: a tray base having a first surface, said tray base having a tray base main body and a holding member for holding the winding core; a winding core; and a roll body of an interlayer film for laminated glass, said roll body being wound in a roll shape on the outer circumferential surface of the winding core. The holding member of the tray base has a portion protruding upward on the first surface side of the tray base, the winding core is held by the holding member of the tray base, and the roll package has a specific configuration (1) or a specific configuration (2).

Description

Technical Field

[0001] The present invention relates to a roll packaging body including a tray base, a roll core, and a roll of an interlayer film for laminated glass. Background Art

[0002] Laminated glass having an interlayer film for laminated glass (hereinafter sometimes simply referred to as an interlayer film) sandwiched between a pair of glass plates is known and has been widely used in vehicles, railway vehicles, spacecraft, ships, buildings, and the like.

[0003] The intermediate film is wound around a core after production to form a roll (for example, Patent Document 1). The roll is stored in a roll packaging body packaged by a predetermined member until use.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2022-015080 Summary of the invention

[0007] Technical problem solved by the invention

[0008] It is considered that the roll body of the intermediate film rolled on the core can be longitudinally arranged on the pallet base to obtain a roll packaging body. The step of longitudinally arranging the roll body of the intermediate film on the pallet base is, for example, as described below. (1) Prepare a pallet base having a retaining component for retaining the core. (2) Prepare the roll body of the intermediate film rolled on the core, and longitudinally arrange the core rolled with the intermediate film on the pallet base in a manner such that the retaining component is located on the inner side of the open end of the core. It should be noted that from the viewpoint of facilitating the operation of longitudinally arranging the core to the pallet base, the inner diameter of the open end of the core is relatively larger than the outer diameter of the retaining component, and there is a gap between the inner circumferential surface of the open end of the core and the outer circumferential surface of the retaining component.

[0009] Therefore, the roll of the intermediate film cannot be kept still in a completely vertical state relative to the upper surface of the pallet base (the angle between the axis of the winding core and the upper surface of the pallet base is 90 degrees), and becomes tilted, and the pallet base contacts the roll of the intermediate film. When the pallet base contacts the roll of the intermediate film, wrinkles may be generated in the intermediate film.

[0010] When laminated glass is produced using an interlayer film in which wrinkles are generated, bubbles and optical strains may occur in the laminated glass.

[0011] An object of the present invention is to provide a roll packaging body capable of suppressing the generation of wrinkles in an intermediate film.

[0012] Technical means of solving problems

[0013] The present application specification discloses the following roll packaging body.

[0014] Item 1. A roll packaging body, comprising: a tray base having a first surface, a roll core, and a roll body of an interlayer film for laminated glass rolled into a roll shape on the outer circumferential surface of the roll core, the tray base having a tray base main body and a holding member for holding the roll core, the holding member of the tray base having a portion protruding upward on the first surface side of the tray base, and the roll core being held by the holding member of the tray base,

[0015] The roll packaging body has the following structure (1) or the following structure (2):

[0016] Configuration (1): The position of the outer periphery of the roll at which the distance from the outer periphery of the roll to the first surface of the pallet base is shortest is set as a first position, the position of the outer periphery of the core at which the distance from the first position to the outer periphery of the core is shortest is set as a second position, the distance from the second position to the first surface of the pallet base is set as A, the distance from the first position to the second position is set as B, and when the angle formed by the straight line connecting the first position and the second position and the first surface of the pallet base is set as θ, C represented by the following formula (C) exceeds 0.

[0017] [Mathematical formula 1]

[0018]

[0019] Configuration (2): The pallet base includes the pallet base body, the holding member, and a cushioning material, wherein the upper surface of the cushioning material is the first surface of the pallet base, and the upper surface of the cushioning material is in contact with the roll body.

[0020] Item 2. The roll packaging container according to Item 1, comprising the configuration (1).

[0021] Item 3. The roll packaging body according to Item 2, wherein:

[0022] The above θ exceeds 0° and is equal to or less than 14.8°.

[0023] Item 4. The roll packaging body according to Item 2 or 3, wherein

[0024] The A is greater than 0 cm and less than 3 cm.

[0025] Item 5. The roll packaging body according to any one of Items 2 to 4, wherein

[0026] The absolute value of the difference between the outer diameter of the holding member and the inner diameter of the opening end of the winding core is greater than 0% and less than 20% of the outer diameter of the holding member, and the height of the holding member is greater than 3 cm and less than 10 cm.

[0027] Item 6. The roll packaging body according to any one of Items 2 to 5, wherein

[0028] The B is greater than or equal to 11.32 cm and less than or equal to 28.57 cm.

[0029] Item 7. The roll packaging body according to any one of Items 2 to 6, wherein

[0030] When the position of the outer periphery of the roll where the distance from the outer periphery of the roll to the first surface of the pallet base is the longest is set as the third position, the distance from the first position to the first surface of the pallet base is set as D, and the distance from the third position to the first surface of the pallet base is set as E, the absolute value of the difference between D and E is less than 9.8 cm.

[0031] Item 8. The roll packaging body according to any one of Items 2 to 7, wherein

[0032] The pallet base includes the pallet base main body, the holding member, and a cushioning material, and an upper surface of the cushioning material is the first surface of the pallet base.

[0033] Item 9. The roll packaging body according to Item 8, wherein

[0034] The buffer material is a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow board, an environmentally friendly plastic sheet or a paperboard.

[0035] Item 10. The roll packaging container according to Item 1, comprising the configuration (2).

[0036] Item 11. The roll packaging body according to Item 10, wherein

[0037] The buffer material is a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow board, an environmentally friendly plastic sheet or a paperboard.

[0038] Item 12. The roll packaging body according to any one of Items 1 to 11, wherein

[0039] The interlayer film for laminated glass has a non-uniform thickness in a width direction of the interlayer film for laminated glass.

[0040] Item 13. The roll packaging body according to any one of Items 1 to 12, wherein

[0041] The pallet base body comprises iron, resin, stainless steel, aluminum, wood or carton.

[0042] Item 14. The roll packaging body according to any one of Items 1 to 13, wherein

[0043] The core comprises polypropylene, polyethylene, polyvinyl chloride, paper, glass, cloth, wood or fiber reinforced plastic.

[0044] Effects of the Invention

[0045] According to the present invention, it is possible to provide a roll packaging body capable of suppressing the generation of wrinkles in an intermediate film. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] [ Figure 1 ] Figure 1 It is a front view showing the roll packaging body according to the first embodiment of the present invention.

[0047] [ Figure 2 ] Figure 2 (a) and (b) are a plan view and a cross-sectional view respectively showing a first example of a tray base that can be used in the present invention.

[0048] [ Figure 3 ] Figure 3 This is a diagram for explaining a specific distance or a specific angle in the roll packaging body according to the first embodiment of the present invention.

[0049] [ Figure 4 ] Figure 4 It is a front view showing a roll packaging body according to a second embodiment of the present invention.

[0050] [ Figure 5 ] Figure 5 (a) and (b) are a plan view and a cross-sectional view respectively showing a second example of the tray base that can be used in the present invention.

[0051] [ Figure 6 ] Figure 6 This is a diagram for explaining a specific distance or a specific angle in the roll packaging body according to the second embodiment of the present invention.

[0052] [ Figure 7 ] Figure 7 It is a front view showing a roll packaging body according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0053] The roll package of the present invention comprises: a tray base having a first surface, a roll core, and a roll of an interlayer film for laminated glass rolled into a roll shape on the outer circumferential surface of the roll core. In the roll package of the present invention, the tray base has a tray base main body and a holding member for holding the roll core, and the holding member of the tray base has a portion protruding upward on the first surface side of the tray base. In the roll package of the present invention, the roll core is held by the holding member of the tray base.

[0054] The roll packaging body of the present invention has the following configuration (1) or the following configuration (2). The roll packaging body of the present invention may have the following configuration (1) or the following configuration (2).

[0055] Configuration (1): The position of the outer periphery of the roll body where the distance from the outer periphery of the roll body to the first surface of the pallet base is shortest is set as the first position, and the position of the outer periphery of the core where the distance from the first position to the outer periphery of the core is shortest is set as the second position. The distance from the second position to the first surface of the pallet base is set as A, the distance from the first position to the second position is set as B, and the angle formed by the straight line connecting the first position and the second position and the first surface of the pallet base is set as θ. In this case, C represented by the following formula (C) exceeds 0.

[0056] [Mathematical formula 2]

[0057]

[0058] Configuration (2): The pallet base includes the pallet base body, the holding member, and a cushioning material, wherein the upper surface of the cushioning material is the first surface of the pallet base, and the upper surface of the cushioning material is in contact with the roll body.

[0059] Since the roll packaging body of the present invention has the above-mentioned structure, the generation of wrinkles in the intermediate film can be suppressed.

[0060] Therefore, when a laminated glass is produced using the interlayer film unwound from the roll packaging body of the present invention, bubbles are less likely to occur in the laminated glass, and optical strain is less likely to occur.

[0061] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. In addition, in each of the accompanying drawings, components having substantially the same function are referred to with the same symbols.

[0062] Hereinafter, for the roll packaging body of the present invention, in reference to Figures 1 to 7 .

[0063] (First embodiment: roll packaging body having configuration (1))

[0064] Figure 1 It is a front view showing the roll packaging body according to the first embodiment of the present invention. Figure 1 This is a front view showing a roll packaging body having the structure (1).

[0065] Figure 1 The roll package 90 shown includes a tray base 1, a roll core 2, a roll body 3 of an intermediate film, a protective cover 4 for protecting the roll body, a top plate member 5 and a support member 6. It should be noted that, for the sake of convenience, Figure 1 In the figure, the protective cover 4 for roll protection is indicated by a dotted line, and the roll 3 and other components arranged inside the protective cover 4 for roll protection are also shown. In addition, for the convenience of explanation, Figure 1 In FIG. 1 , the holding member 12 of the tray base 1 and the holding member 52 of the top plate member 5 that are present on the inner side of the open end of the winding core 2 are indicated by dotted lines.

[0066] The pallet base 1 has a pallet base body 11 and a holding member 12 for holding a winding core. In addition, the pallet base 1 has a first surface 1a and a second surface 1b. The first surface 1a and the second surface 1b are surfaces facing each other in the pallet base 1. The holding member 12 has a portion protruding upward on the first surface 1a side.

[0067] The winding core 2 has openings at both ends. The winding core 2 has open ends.

[0068] The core 2 is arranged so that the holding member 12 is located inside the opening end of the core 2. Therefore, the core 2 is held by the holding member 12. The inner diameter of the opening end of the core 2 is larger than the outer diameter of the holding member 12.

[0069] The intermediate film is wound into a roll shape on the outer circumference of the winding core 2 to form an intermediate film roll body 3. The intermediate film is wound into a roll shape on the outer circumference of the winding core 2 except for the two ends. Therefore, the roll body 3 is arranged on the tray base 1 in the longitudinal direction.

[0070] In the roll packaging body 90 , the first surface 1 a of the tray base 1 and the roll body 3 are not in contact with each other.

[0071] The roll body protection cover 4 is a cover that covers the outer surface of the roll body 3. The outer surface of the roll body 3 is covered with the roll body protection cover 4.

[0072] The top plate member 5 is a member that covers the upper portion of the roll 3 .

[0073] The supporting member 6 is a member that supports the tray base 1 and the top plate member 5 .

[0074] First, in reference Figure 2 At the same time, the tray base 1 is described. Figure 2 (a) and (b) are a plan view and a cross-sectional view respectively showing a first example of a pallet base that can be used in the present invention. Figure 2 (b) is along Figure 2 (a) is a cross-sectional view of line II.

[0075] The pallet base 1 has a pallet base body 11 and a retaining member 12. In addition, the pallet base 1 has a first surface 1a and a second surface 1b. The first surface 1a and the second surface 1b are surfaces facing each other in the pallet base 1. The first surface 1a is an upper main surface of the pallet base 1. The second surface 1b is a lower main surface of the pallet base 1. The second surface 1b of the pallet base 1 is a surface in contact with a loading surface such as the ground.

[0076] In the pallet base 1, the upper surface of the pallet base main body 11 is the first surface 1a of the pallet base 1. In the pallet base 1, the lower surface of the pallet base main body 11 is the second surface 1b of the pallet base 1. It should be noted that the pallet base main body 11 may have a gap in order to achieve lightweight. Therefore, there may be a gap on the upper surface of the pallet base main body 11. The upper surface of the pallet base main body 11 refers to the upper surface of the pallet base main body 11 when there is a gap on the upper surface and the upper surface of the pallet base main body 11 does not have a gap. The first surface 1a of the pallet base 1 refers to the upper surface of the pallet base main body 11 when there is a gap on the upper surface of the pallet base main body 11 and the upper surface of the pallet base main body 11 does not have a gap.

[0077] The size, shape and material of the pallet base body 11 are not particularly limited as long as they can carry the core and the interlayer film roll. As the pallet base body 11, a conventionally known component known as a pallet can be used. The pallet base body 11 can be a three-dimensional group assembled from a plurality of frames.

[0078] The material of the pallet base body 11 is not particularly limited. The pallet base body 11 may be made of metal, resin, fiber reinforced plastic, wood, or paper. The pallet base body 11 made of resin may be made of foamed resin.

[0079] The pallet base body 11 includes, for example, iron, resin, stainless steel, aluminum, wood, or cardboard. The iron may be plated iron. The resin may include polypropylene or the like.

[0080] The holding member 12 is mounted to the pallet base body 11. The holding member 12 may be detachable from the pallet base body 11 or may not be detachable. The holding member 12 and the pallet base body 11 may be detachable or inseparable.

[0081] The holding member 12 has a portion protruding upward on the first surface 1a side of the pallet base 1. The upper surface of the holding member 12 is located above the first surface 1a of the portion of the holding member 12 excluding the pallet base 1. The holding member 12 has an opening 12a. By having the opening 12a in the holding member 12, the pallet base 1 can be made lighter than when the opening 12a is not provided. When preparing the roll packaging body 90, the inner side of the open end of the core 2 is arranged on the outer side of the holding member 12 (outside of the opening 12a of the holding member 12). In the roll packaging body 90, the inner side of the lower open end of the core 2 is arranged on the outer side of the holding member 12 (outside of the opening 12a of the holding member 12). When the pallet base 1 is made into a top view, the outer shape of the holding member 12 is circular. However, when the pallet base 1 is made into a top view, the outer shape of the holding member 12 may be a shape other than a circle. The shape of the holding member 12 is not particularly limited as long as it can hold the core 2.

[0082] The outer diameter of the retaining member 12 is smaller than the inner diameter of the open end of the core 2. The ratio of the absolute value of the difference between the outer diameter of the retaining member 12 and the inner diameter of the open end of the core 2 to the outer diameter of the retaining member 12 is preferably greater than 0%, more preferably greater than 4%, and preferably less than 20%, more preferably less than 15%. The ratio is expressed by the formula: [(absolute value of the difference between the outer diameter of the retaining member 12 and the inner diameter of the open end of the core 2) / outer diameter of the retaining member 12]×100. When the ratio is greater than the lower limit, it is easy to arrange the retaining member 12 on the inner side of the open end of the core 2 when preparing the roll packaging body 90, so the longitudinal setting operation of the core 2 to the pallet base can be easily performed. When the ratio is less than the upper limit, the inclination of the roll body 3 of the intermediate film can be effectively suppressed, and the effect of the present invention can be further effectively exerted.

[0083] The height of the holding member 12 is preferably 3 cm or more, more preferably 4 cm or more, and preferably 10 cm or less, more preferably 9 cm or less. When the height of the holding member 12 is above the lower limit and below the upper limit, the tilt of the roll 3 of the intermediate film can be effectively suppressed, and the effect of the present invention can be further effectively exerted. It should be noted that the height of the holding member 12 refers to the distance from the upper surface of the tray base body 11 to the upper surface of the holding member 12.

[0084] The material of the holding member 12 is not particularly limited. The holding member 12 may be made of metal, resin, fiber reinforced plastic, wood, or paper. The holding member 12 made of resin may be made of foamed resin.

[0085] The material of the tray base body 11 and the material of the holding member 12 may be the same or different.

[0086] The pallet base 1 has two holding components 12. It should be noted that the pallet base 1 may have only one holding component 12, may have two, or may have more than two.

[0087] At the four corners of the first surface 1 a of the tray chassis 1 , there are members extending upward from the first surface 1 a , and members for holding the supporting member 6 may be arranged.

[0088] Next, in reference Figure 3 At the same time, the structure (1) in the roll packaging body 90 is explained.

[0089] Figure 3 In the roll packaging body 90, the tray base 1, the core 2 and the roll body 3 are shown as necessary components for explaining the structure (1). It should be noted that for the sake of convenience, the holding member 12 arranged inside the open end of the core 2 is indicated by a dotted line.

[0090] The position of the outer periphery of the roll body 3 where the distance from the outer periphery of the roll body 3 to the first surface 1a of the pallet base 1 is the shortest is set as the first position P1. The position of the outer periphery of the core 2 where the distance from the first position P1 to the outer periphery of the core 2 is the shortest is set as the second position P2. The position of the outer periphery of the roll body 3 where the distance from the outer periphery of the roll body 3 to the first surface 1a of the pallet base 1 is the longest is set as the third position P3. The position of the intersection of the straight line connecting the first position P1 and the second position P2 and the first surface 1a of the pallet base 1 is set as the fourth position P4.

[0091] The distance from the second position P2 to the first surface 1a of the pallet base 1 is A (cm). The distance from the first position P1 to the second position P2 is B (cm). The distance from the first position P1 to the first surface 1a of the pallet base 1 is D (cm). The distance from the third position P3 to the first surface 1a of the pallet base 1 is E (cm).

[0092] An angle formed by a straight line connecting the first position P1 and the second position P2 and the first surface 1 a of the pallet chassis 1 is denoted by θ.

[0093] In the roll packaging body 90 having the above-described configuration (1), C represented by the following formula (C) exceeds 0. Therefore, the roll packaging body 90 can suppress the generation of wrinkles in the interlayer film.

[0094] [Mathematical formula 3]

[0095]

[0096] It should be noted that C is usually the distance from the first position P1 to the fourth position P4. Figure 3 C represents the distance (cm).

[0097] In the roll packaging body 90 having the structure (1), C represented by the formula (C) exceeds 0 cm, preferably is greater than 0.5 cm. When C represented by the formula (C) is greater than the lower limit, the effect of the present invention can be further effectively exerted. It should be noted that C represented by the formula (C) can be less than 160 cm, less than 100 cm, less than 75 cm, less than 70 cm, less than 60 cm, less than 55 cm, less than 30 cm, less than 20 cm, less than 10 cm, or less than 5 cm.

[0098] The roll 3 cannot be left standing in a state perpendicular to the first surface 1a of the pallet base 1 (the angle formed by the axis direction of the core 2 and the first surface 1a of the pallet base 1 is 90°). The roll 3 is left standing in a tilted state (the angle formed by the axis direction of the core 2 and the first surface 1a of the pallet base 1 is less than 90°). The roll 3 is left standing in a manner such that C represented by the formula (C) exceeds 0.

[0099] A is a distance from the second position P2 to the first surface 1a of the tray base 1. A is preferably greater than 0 cm, more preferably greater than 0.5 cm, and preferably less than 3 cm, more preferably less than 2.5 cm. When A is greater than the lower limit and less than the upper limit, the effect of the present invention can be more effectively exerted.

[0100] The B is the distance from the first position P1 to the second position P2. The B is preferably greater than 11.32 cm, more preferably greater than 15.00 cm, and preferably less than 28.60 cm, more preferably less than 28.57 cm, and further preferably less than 25.00 cm. When the B is greater than the lower limit and less than the upper limit, the effect of the present invention can be further effectively exerted. The larger the B, the easier it is to generate wrinkles in the roll of the intermediate film, but in the present invention, even if the B is relatively large, the generation of wrinkles in the roll of the intermediate film can be effectively suppressed.

[0101] The D is a distance from the first position P1 to the first surface 1a of the tray base 1. In the roll packaging body 90 having the configuration (1), the D exceeds 0 cm. The D is preferably 0.5 cm or more, more preferably 1.0 cm or more, and preferably 9.8 cm or less, more preferably 9.0 cm or less. When the D is greater than the lower limit and less than the upper limit, the effect of the present invention can be more effectively exerted.

[0102] The E is the distance from the third position P3 to the first surface 1a of the tray base 1. In the roll packaging body 90 having the configuration (1), the E exceeds 0 cm. The E is preferably 0.5 cm or more, more preferably 1.0 cm or more, and preferably 9.8 cm or less, more preferably 9.0 cm or less. When the E is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0103] Typically, D is smaller than E.

[0104] The absolute value of the difference between D and E is preferably 0.5 cm or more, more preferably 1.3 cm or more, and preferably 9.8 cm or less, more preferably 8.2 cm or less. When the absolute value of the difference is above the lower limit and below the upper limit, the effect of the present invention can be more effectively exerted.

[0105] The angle θ is an angle formed by a straight line connecting the first position P1 and the second position P2 and the first surface 1a of the pallet base 1. The angle θ is preferably greater than 0°, more preferably greater than 2°, and is preferably less than 14.8°, more preferably less than 12°. When the angle θ is greater than the lower limit and less than the upper limit, the effect of the present invention can be more effectively exerted.

[0106] Next, the winding core 2 will be described.

[0107] As the winding core 2, a conventionally known winding core can be used. The shape of the winding core 2 is a cylindrical shape having openings at both ends. The winding core 2 has open ends. The winding core 2 has openings at both ends. The shape of the winding core 2 is not particularly limited as long as it can be retained by the retaining member 12. As for the winding core 2, for example, it can be a cylindrical shape, a cylindrical shape having openings at both ends, or a shape other than these.

[0108] The material of the core 2 is not particularly limited. The core 2 may be made of metal, resin, fiber reinforced plastic, wood, paper, or glass. The core 2 made of resin may be made of foamed resin.

[0109] The core 2 may be made of, for example, polypropylene, polyethylene, polyvinyl chloride, paper, glass, cloth, wood or fiber-reinforced plastic. The wood may be bamboo.

[0110] Next, the roll body 3 and the interlayer film constituting the roll body 3 will be described.

[0111] As the intermediate film, a conventionally known intermediate film can be used. The intermediate film has a one-layer structure or a structure of two or more layers. The intermediate film may have a one-layer structure, a two-layer structure, or a structure of two or more layers. The intermediate film may have a three-layer structure, a three-layer structure, a four-layer structure, a four-layer structure, a five-layer structure, or a five-layer structure. The intermediate film may have a structure of less than 10 layers, or a structure of less than 5 layers. The intermediate film may have only the first layer. The intermediate film may have the first layer and the second layer arranged on the first surface side of the first layer. The intermediate film may have the first layer, the second layer arranged on the first surface side of the first layer, and the third layer arranged on the second surface side opposite to the first surface of the first layer.

[0112] The intermediate film may contain a thermoplastic resin, or may contain a thermoplastic resin and a plasticizer. The intermediate film may include a layer containing a thermoplastic resin, or may include a layer containing a thermoplastic resin and a plasticizer. The first layer preferably contains a thermoplastic resin, or preferably contains a thermoplastic resin and a plasticizer. The second layer preferably contains a thermoplastic resin, or preferably contains a thermoplastic resin and a plasticizer. The third layer preferably contains a thermoplastic resin, or preferably contains a thermoplastic resin and a plasticizer.

[0113] As the thermoplastic resin, polyvinyl acetal resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin, polyurethane resin, (meth) acrylic resin, polyolefin resin, ionomer resin and polyvinyl alcohol resin etc. can be mentioned. Thermoplastic resins other than these can be used. The thermoplastic resin can be used alone or in combination of two or more.

[0114] The plasticizer is not particularly limited. As the plasticizer, a conventionally known plasticizer can be used. As the plasticizer, organic ester plasticizers such as monobasic organic acid esters and polybasic organic acid esters, organic phosphate plasticizers, and organic phosphite plasticizers can be cited. The plasticizer is preferably an organic ester plasticizer. The plasticizer is preferably a liquid plasticizer. The plasticizer can be used alone or in combination of two or more.

[0115] The intermediate film may contain other components such as heat insulating materials, ultraviolet absorbers, antioxidants, colorants, coupling agents, dispersants, surfactants, flame retardants, antistatic agents, adhesion regulators (alkali metal salts and alkaline earth metal salts, etc.), moisture resistance agents, fluorescent brighteners, and infrared absorbers. The other components may be used alone or in combination of two or more.

[0116] The intermediate film may have a uniform thickness or a non-uniform thickness in the width direction of the intermediate film. In an intermediate film having a non-uniform thickness in the width direction of the intermediate film, wrinkles are easily generated in the roll of the intermediate film. However, in the present invention, even in an intermediate film having a non-uniform thickness, the generation of wrinkles in the roll of the intermediate film can be effectively suppressed.

[0117] The roll diameter of the roll body 3 may be constant or different in the axial direction along the core 2. The roll diameter of the end of the roll body 3 on the side of the tray base 1 may be different from the roll diameter of the end of the roll body 3 on the side of the top plate member 5. The roll diameter of the end of the roll body 3 on the side of the tray base 1 may be larger or smaller than the roll diameter of the end of the roll body 3 on the side of the top plate member 5. In the case of an intermediate film having a non-uniform thickness in the width direction of the intermediate film, the roll diameter of the roll body 3 is usually different at the end on the side of the tray base 1 and the end on the side of the top plate member 5.

[0118] The minimum value of the roll diameter of the roll body 3 is preferably 38.5 cm or more, more preferably 35.0 cm or more, and is preferably 73.0 cm or less, more preferably 70.0 cm or less.

[0119] It should be noted that the roll diameter of the roll body 3 refers to the outer diameter of the roll body 3 .

[0120] Next, the roll body protection cover 4 will be described.

[0121] The roll body protection cover 4 is a member that covers the outer surface of the roll body 3. The roll body protection cover 4 is used to protect the roll body 3 from dust and the like. As the roll body protection cover 4, a conventionally known roll body protection cover can be used.

[0122] The lap body protection cover 4 preferably covers the entire outer circumferential surface of the lap body 3. The lap body protection cover 4 may be in contact with the outer circumferential surface of the lap body 3 or may not be in contact with the outer circumferential surface of the lap body 3.

[0123] The protective cover 4 for protecting the roll body may be made of resin, paper, aluminum, or a composite material of these.

[0124] It should be noted that the roll body protection cover 4 may not be used.

[0125] Next, the top plate member 5 will be described.

[0126] The top plate member 5 includes a top plate member main body 51 and a holding member 52 for holding the winding core. As the top plate member 5, a conventionally known top plate member can be used.

[0127] The material of the top plate member body 51 is not particularly limited. The top plate member body 51 may be made of metal, resin, fiber reinforced plastic, wood, or paper. The top plate member body 51 made of resin may be made of foamed resin.

[0128] The holding member 52 is mounted on the top plate member body 51. The holding member 52 may be detachable from the top plate member body 51 or may not be detachable. The holding member 52 and the top plate member body 51 may be separable or inseparable.

[0129] The retaining member 52 has a portion protruding downward on the lower surface side of the top plate member main body 51. The retaining member 52 has an opening. By having the retaining member 52 have an opening, the top plate member 5 can be made lighter than in the case where the retaining member 52 has no opening. When preparing the roll packaging body 90, the inner side of the open end of the core 2 is arranged on the outer side of the retaining member 52 (the outer side of the opening of the retaining member 52). In the roll packaging body 90, the inner side of the open end of the upper side of the core 2 is arranged on the outer side of the retaining member 52 (the outer side of the opening of the retaining member 52). When the top plate member 5 is observed from the bottom, the outer shape of the retaining member 52 is circular. However, when the top plate member 5 is observed from the bottom, the outer shape of the retaining member 52 may be a shape other than a circle. The shape of the retaining member 52 is not particularly limited as long as it can maintain the shape of the core 2.

[0130] The outer diameter of the retaining member 52 is smaller than the inner diameter of the opening end of the core 2. The ratio of the absolute value of the difference between the outer diameter of the retaining member 52 and the inner diameter of the opening end of the core 2 to the outer diameter of the retaining member 52 is preferably greater than 0%, more preferably greater than 4%, and preferably less than 20%, more preferably less than 15%. The ratio is expressed by the formula: [(absolute value of the difference between the outer diameter of the retaining member 52 and the inner diameter of the opening end of the core 2) / outer diameter of the retaining member 52]×100. When the ratio is greater than the lower limit, the retaining member 52 is easily arranged on the inner side of the opening end of the core 2 when preparing the roll packaging body 90. When the ratio is less than the upper limit, the inclination of the roll body 3 of the intermediate film can be effectively suppressed, and the effect of the present invention can be further effectively exerted.

[0131] The material of the holding member 52 is not particularly limited. The holding member 52 may be made of metal, resin, fiber reinforced plastic, wood, or paper. The holding member 52 made of resin may be made of foamed resin.

[0132] The material of the top plate member main body 51 and the material of the holding member 52 may be the same or different.

[0133] The top plate member body 51 has two holding members 52. It should be noted that the top plate member body 51 may have only one holding member 52, may have two, or may have more than two.

[0134] Next, the supporting member 6 will be described.

[0135] The support members 6 are, for example, metal members. The support members 6 are provided at the four corners of the pallet base 1. The pallet base 1 and the top plate member 5 are connected by the support members 6. From the viewpoint of stably supporting the pallet base 1 and the top plate member 5, it is preferred to use four or more support members 6, and more preferably eight or more support members 6, for one pallet base 1. As the support members 6, conventionally known support members can be used.

[0136] (Second embodiment: roll packaging body having configuration (1))

[0137] Figure 4 It is a front view showing a roll packaging body according to a second embodiment of the present invention. Figure 4 This is a front view showing a roll packaging body having the structure (1).

[0138] Figure 4 The roll package 90A shown includes a tray base 1A, a roll core 2 , an interlayer film roll 3 , a roll protection cover 4 , a top plate member 5 , and a support member 6 . Figure 1 The roll packaging body 90 shown is Figure 4 In the roll packaging body 90A shown, the structure of the tray base is different. It should be noted that for the sake of convenience, Figure 4 In the figure, the protective cover 4 for roll protection is indicated by a dotted line, and the roll 3 and other components arranged inside the protective cover 4 for roll protection are also shown. In addition, for the convenience of explanation, Figure 4 In FIG. 1 , the holding member 12 of the pallet base 1A and the holding member 52 of the top plate member 5 present on the inner side of the open end of the winding core 2 are indicated by dotted lines. Figure 4 In, with Figure 1 Differently, of the parts of the two rolls 3, the part of one roll 3 is shown in the figure.

[0139] The pallet base 1A includes a pallet base body 11, a holding member 12 for holding a winding core, and a cushioning material 13. The pallet base 1A includes a first surface 1Aa and a second surface 1Ab. The first surface 1Aa and the second surface 1Ab are surfaces facing each other in the pallet base 1A. The holding member 12 includes a portion protruding upward on the first surface 1Aa side.

[0140] The winding core 2 has openings at both ends. The winding core 2 has open ends.

[0141] The core 2 is arranged in such a manner that the retaining member 12 is provided on the inner side of the open end of the core 2. Therefore, the core 2 is retained by the retaining member 12. The inner diameter of the open end of the core 2 is larger than the outer diameter of the retaining member 12. It should be noted that, in the roll packaging body 90A, a part of the lower end of the core 2 may be present at a position higher than the first surface 1Aa of the pallet base 1A. In the roll packaging body 90A, the entire lower end of the core 2 may be present at a position lower than the first surface 1Aa of the pallet base 1A.

[0142] The interlayer film is wound into a roll shape on the outer circumference of the winding core 2 to form an interlayer film roll body 3. The interlayer film is wound into a roll shape on the outer circumference of the winding core 2 except for both ends. Therefore, the roll body 3 is longitudinally arranged on the tray base 1A.

[0143] In the roll packaging body 90A, the first surface 1Aa of the tray base 1A and the roll body 3 are not in contact.

[0144] It should be noted that the preferred configurations of the roll core 2 , the roll body 3 , the roll body protection cover 4 , the top plate member 5 , and the support member 6 in the roll package 90A are as described in the “first embodiment” and thus are omitted.

[0145] Next, in reference Figure 5 At the same time, the tray base 1A will be described. Figure 5 (a) and (b) are a plan view and a cross-sectional view respectively showing a second example of the tray base that can be used in the present invention. Figure 5 (b) is along Figure 5 (a) is a cross-sectional view of line II.

[0146] The pallet base 1A has a first surface 1Aa. The pallet base 1A has a pallet base body 11, a retaining member 12, and a cushioning material 13. The pallet base 1A has a first surface 1Aa and a second surface 1Ab. The first surface 1Aa and the second surface 1Ab are surfaces facing each other in the pallet base 1A. The second surface 1Ab of the pallet base 1A is a surface that contacts a loading surface such as the ground. The first surface 1Aa is an upper main surface of the pallet base 1A. The second surface 1Ab is a lower main surface of the pallet base 1A.

[0147] The preferred configurations of the pallet base body 11 and the holding member 12 in the pallet base 1A are as described in the above-mentioned "first embodiment", and thus description thereof is omitted.

[0148] In the pallet base 1A, a cushioning material 13 is disposed on the upper surface of the pallet base main body 11. In the pallet base 1A, the upper surface of the cushioning material 13 is a first surface 1Aa of the pallet base 1A.

[0149] The material of the cushioning material 13 is not particularly limited as long as it functions as a cushioning material. The hardness of the cushioning material 13 is preferably lower than the hardness of the pallet base body 11. The cushioning material 13 is preferably softer than the pallet base body 11. The cushioning material 13 is preferably more cushioning than the pallet base body 11.

[0150] From the viewpoint of effectively suppressing the generation of wrinkles in the interlayer film when the cushioning material 13 contacts the roll 3 , the cushioning material 13 is preferably a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow board, an environmentally friendly plastic sheet or a cardboard.

[0151] The thickness of the buffer material 13 may be greater than or equal to 1 mm, greater than or equal to 5 mm, less than or equal to 15 mm, or less than or equal to 10 mm.

[0152] The pallet base 1A has one sheet of cushioning material 13. The pallet base 1A may have more than one sheet of cushioning material 13, may have two sheets, or may have more than two sheets. In the pallet base 1A, two or more sheets of cushioning material 13 may be overlapped and arranged on the upper surface of the pallet base body 11. In this case, the thickness and type of the two or more sheets of cushioning material 13 may be the same or different.

[0153] When the pallet chassis 1A has two or more cushioning materials 13 , the total thickness of the cushioning materials 13 may be 1 mm or more, 5 mm or more, 15 mm or less, or 10 mm or less.

[0154] Next, in reference Figure 6 At the same time, the structure (1) in the roll packaging body 90A is explained.

[0155] Figure 6 In the roll packaging body 90A, the pallet base 1A, the core 2 and the roll body 3 are illustrated as the necessary components for explaining the configuration (1). It should be noted that, for the sake of convenience, the retaining member 12 disposed on the inner side of the open end of the core 2 is indicated by a dotted line. In addition, for the sake of convenience, the lower end portion of the core 2 (the lower end portion of the core 2 disposed on the inner side of the cushioning material 13) which cannot be visually confirmed in the front view of the roll packaging body 90A is also indicated.

[0156] As described above, in the pallet base 1A, the upper surface of the cushioning material 13 is the first surface 1Aa of the pallet base 1A.

[0157] The position of the outer periphery of the roll body 3 where the distance from the outer periphery of the roll body 3 to the first surface 1Aa of the pallet base 1A is the shortest is set as the first position P1. The position of the outer periphery of the core 2 where the distance from the first position P1 to the outer periphery of the core 2 is the shortest is set as the second position P2. The position of the outer periphery of the roll body 3 where the distance from the outer periphery of the roll body 3 to the first surface 1Aa of the pallet base 1A is the longest is set as the third position P3. The position of the intersection of the straight line connecting the first position P1 and the second position P2 and the first surface 1Aa of the pallet base 1A is set as the fourth position P4.

[0158] The distance from the second position P2 to the first surface 1Aa of the pallet base 1A is A (cm). The distance from the first position P1 to the second position P2 is B (cm). The distance from the first position P1 to the first surface 1Aa of the pallet base 1A is D (cm). The distance from the third position P3 to the first surface 1Aa of the pallet base 1A is E (cm).

[0159] An angle formed by a straight line connecting the first position P1 and the second position P2 and the first surface 1Aa of the pallet base 1A is θ.

[0160] In the roll packaging body 90A having the above-described configuration (1), C represented by the following formula (C) exceeds 0. Therefore, in the roll packaging body 90A, the generation of wrinkles in the interlayer film can be suppressed.

[0161] [Formula 4]

[0162]

[0163] It should be noted that C is usually the distance from the first position P1 to the fourth position P4. Figure 6 C represents the distance (cm).

[0164] In addition, the preferred configurations of A, B, C, D, E, and θ in the roll package 90A are as described in the “first embodiment”, and thus description thereof is omitted.

[0165] (Third embodiment: roll packaging body having configuration (2))

[0166] Figure 7 It is a front view showing a roll packaging body according to a third embodiment of the present invention. Figure 7 It is a front view showing a roll packaging body having the structure (2).

[0167] Figure 7 The roll package 90B shown includes a tray base 1A, a roll core 2, an interlayer film roll 3, a roll protection cover 4, a top plate member 5, and a support member 6. It should be noted that, for the sake of convenience, Figure 7 In the figure, the protective cover 4 for roll protection is indicated by a dotted line, and the roll 3 and other components arranged inside the protective cover 4 for roll protection are also shown. In addition, for the convenience of explanation, Figure 7 In FIG. 1 , the holding member 12 of the pallet base 1A and the holding member 52 of the top plate member 5 present on the inner side of the open end of the winding core 2 are indicated by dotted lines. Figure 7 In, with Figure 1 Differently, of the parts of the two rolls 3, the part of one roll 3 is shown in the figure.

[0168] The pallet base 1A has a pallet base body 11, a holding member 12 for holding a winding core, and a cushioning material 13. In addition, the pallet base 1A has a first surface 1Aa and a second surface 1Ab. The first surface 1Aa and the second surface 1Ab are surfaces facing each other in the pallet base 1A. The holding member 12 has a portion protruding upward on the first surface 1Aa side. In the pallet base 1A, the cushioning material 13 is arranged on the upper surface of the pallet base body 11. In the pallet base 1A, the upper surface of the cushioning material 13 is the first surface 1Aa of the pallet base 1A.

[0169] The winding core 2 has openings at both ends. The winding core 2 has open ends.

[0170] The core 2 is arranged in such a manner that the retaining member 12 is provided inside the open end of the core 2. Therefore, the core 2 is retained by the retaining member 12. The inner diameter of the open end of the core 2 is larger than the outer diameter of the retaining member 12. It should be noted that, in the roll packaging body 90B, a part of the lower end of the core 2 may be present at a position higher than the first surface 1Aa of the pallet base 1A. In the roll packaging body 90B, the entire lower end of the core 2 may be present at a position lower than the first surface 1Aa of the pallet base 1A.

[0171] The interlayer film is wound into a roll shape on the outer circumference of the winding core 2 to form an interlayer film roll body 3. The interlayer film is wound into a roll shape on the outer circumference of the winding core 2 except for both ends. Therefore, the roll body 3 is longitudinally arranged on the tray base 1A.

[0172] Figure 7 In the roll packaging body 90B shown, Figure 4 Unlike the roll packaging body 90A shown, the first surface 1Aa of the tray base 1A (the upper surface of the cushioning material 13 ) is in contact with the roll body 3 .

[0173] In the roll packaging body 90B having the configuration (2), since the cushioning material 13 is provided, the first surface 1Aa of the tray base 1A (the upper surface of the cushioning material 13) is in contact with the roll body 3, and the generation of wrinkles in the interlayer film can be effectively suppressed.

[0174] The preferred configurations of the roll core 2, the roll 3, the roll protection cover 4, the top plate member 5, and the support member 6 in the roll packaging body 90B are as described in the "first embodiment" and are therefore omitted. The preferred configurations of the tray base 1A in the roll packaging body 90B are as described in the "second embodiment" and are therefore omitted.

[0175] (Other details of the roll packaging)

[0176] The roll packaging body of the present invention comprises the tray base, the roll core, and the roll body of the interlayer film. The roll packaging body of the present invention comprises the above configuration (1) or the above configuration (2).

[0177] The roll packaging body of the present invention may or may not include the protective cover. The roll packaging body of the present invention may or may not include the top plate member. The roll packaging body of the present invention may or may not include the supporting member.

[0178] The roll package of the present invention may include other components in addition to the above components (tray base, roll core, roll body, roll body protection cover, top plate component, support component). For example, the roll package of the present invention may be wound with a sheet material so as to cover the roll core, the roll body, and the support component. The roll package of the present invention may be wrapped with a sheet material so as to cover the roll core, the roll body, and the support component.

[0179] In addition, in the roll packaging body of the present invention having configuration (1), the pallet base may be a pallet base having the pallet base body and the retaining member, or may be a pallet base having the pallet base body, the retaining member and the cushioning material.

[0180] The intermediate film may be an extruded product. The intermediate film preferably has an MD direction and a TD direction. The MD direction is the flow direction of the intermediate film when the intermediate film is manufactured. The TD direction is a direction orthogonal to the flow direction of the intermediate film when the intermediate film is manufactured, and is a direction orthogonal to the thickness direction of the intermediate film. The intermediate film is usually wound into a roll shape on the outer circumferential surface of the winding core along the MD direction.

[0181] The interlayer film for laminated glass is used to obtain laminated glass (the use of the interlayer film for laminated glass for laminated glass). The interlayer film for laminated glass is an interlayer film suitable for obtaining laminated glass. The interlayer film for laminated glass is cut to the size of laminated glass for use. The roll of the interlayer film for laminated glass is used to obtain laminated glass (the use of the roll of the interlayer film for laminated glass for laminated glass). The roll of the interlayer film for laminated glass is a roll suitable for obtaining laminated glass. The roll of the interlayer film for laminated glass is cut to the size of laminated glass for use. The laminated glass comprises a first laminated glass component, a second laminated glass component and the interlayer film. In the laminated glass, the interlayer film is arranged between the first laminated glass component and the second laminated glass component.

[0182] The first laminated glass component is preferably a first glass plate. The second laminated glass component is preferably a second glass plate.

[0183] As the first and second laminated glass components, glass plates and PET (polyethylene terephthalate) films can be cited. The laminated glass includes not only laminated glass with an intermediate film sandwiched between two glass plates, but also laminated glass with an intermediate film sandwiched between a glass plate and a PET film. The laminated glass is a laminated body having glass plates, and preferably at least one glass plate is used. The first laminated glass component and the second laminated glass component are respectively glass plates or PET films, and in the laminated glass, at least one of the first laminated glass component and the second laminated glass component preferably includes a glass plate. It is particularly preferred that both the first and second laminated glass components are glass plates.

[0184] Hereinafter, the present invention will be described by giving specific examples and comparative examples of the present invention. The present invention is not limited to the following examples.

[0185] Prepare as follows.

[0186] <Tray Base>

[0187] Pallet base (1): A pallet base having a pallet base body (made of iron), a retaining member (outer diameter 14.75 cm and height 4.6 cm) and a cushioning material (a foamed polypropylene sheet with a thickness of 15 mm, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO Co., Ltd.) (having a structure similar to that of Figure 5 Shape of tray base)

[0188] Pallet base (2): A pallet base having a pallet base body (made of iron), a retaining member (outer diameter 14.75 cm and height 3.0 cm) and a cushioning material (a foamed polypropylene sheet with a thickness of 15 mm, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO Co., Ltd.) (having a structure similar to that of Figure 5 Shape of tray base)

[0189] Pallet base (3): A pallet base having a pallet base body (made of iron), a retaining member (outer diameter 13.86 cm and height 4.6 cm) and a cushioning material (a foamed polypropylene sheet with a thickness of 15 mm, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO Co., Ltd.) (having a structure similar to that of Figure 5 Shape of tray base)

[0190] Pallet base (4): A pallet base having a pallet base body (made of polypropylene), a retaining member (outer diameter 14.75 cm and height 4.6 cm) and a cushioning material (a foamed polypropylene sheet with a thickness of 15 mm, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO Co., Ltd.) (having a structure similar to that of Figure 5 Shape of tray base)

[0191] Tray base (5): A tray base having a tray base body (made of iron), a retaining member (outer diameter 14.75 cm and height 4.6 cm) (having a similar Figure 2 Shape of tray base)

[0192] Pallet base (6): A pallet base having a pallet base body (made of iron), a retaining member (outer diameter 14.75 cm and height 4.6 cm) and a cushioning material (a foamed polypropylene sheet with a thickness of 10 mm, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO Co., Ltd.) (having a structure similar to Figure 5 Shape of tray base)

[0193] Pallet base (7): A pallet base (having a structure similar to that of a pallet base) having a pallet base body (made of iron), a retaining member (outer diameter 14.75 cm and height 4.6 cm) and a cushioning material (cardboard with a thickness of 10 mm). Figure 5 Shape of tray base)

[0194] Tray base (X1): A tray base having a tray base body (made of iron), a retaining member (outer diameter 11.55 cm and height 4.6 cm) (having a similar Figure 2 Shape of tray base)

[0195] Tray base (X2): A tray base having a tray base body (made of iron), a holding member (outer diameter 14.75 cm and height 1.0 cm) (having a similar Figure 2 Shape of tray base)

[0196] Pallet base (x3): Pallet base having a pallet base body (made of steel) and a cushioning material (15 mm thick foamed polypropylene sheet, "PAULOWNIA" manufactured by Mitsui Chemicals TOHCELLO)

[0197] The following roll cores were prepared.

[0198] <Core>

[0199] Core (polypropylene, outer diameter: 15.8 cm, inner diameter at the open end: 15.4 cm)

[0200] <Interlayer>

[0201] Intermediate film (1) (intermediate film produced by the following production method (1))

[0202] Intermediate film (2) (intermediate film produced by the following production method (2))

[0203] [Method for producing interlayer film (1) (1)]

[0204] Preparation of composition for forming layer 1:

[0205] The following components were mixed and kneaded thoroughly with a mixing roll to obtain a composition for forming the first layer.

[0206] 100 parts by weight of polyvinyl acetal resin (average degree of polymerization 3000, hydroxyl content 22 mol%, acetylation degree 13 mol%, acetalization degree 65 mol%)

[0207] Triethylene glycol di-2-ethylhexanoate (3GO) 60 parts by weight

[0208] Tinuvin 326 (2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" manufactured by BASF) was added in an amount of 0.2% by weight in the obtained first layer.

[0209] In the obtained first layer, BHT (2,6-di-tert-butyl-p-cresol) was present in an amount of 0.2% by weight.

[0210] Preparation of the composition for forming the second layer and the third layer:

[0211] The following components were prepared and kneaded thoroughly with a mixing roll to obtain a composition for forming the second layer and the third layer.

[0212] 100 parts by weight of polyvinyl acetal resin (average degree of polymerization 1700, hydroxyl content 30.5 mol%, acetylation degree 1 mol%, acetalization degree 68.5 mol%)

[0213] Triethylene glycol di-2-ethylhexanoate (3GO) 38 parts by weight

[0214] Tinuvin 326 (2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" manufactured by BASF) was added in an amount of 0.2% by weight in the obtained second and third layers.

[0215] BHT (2,6-di-tert-butyl-p-cresol) was added in an amount of 0.2 wt % in the obtained second and third layers.

[0216] The composition for forming the first layer and the composition for forming the second layer and the third layer are co-extruded using an extruder to obtain a wedge-shaped intermediate film (1) having a laminated structure of the second layer / the first layer / the third layer. The intermediate film (1) obtained has a minimum thickness (760 μm) at one end and a maximum thickness (1260 μm) at the other end. The distance between the one end and the other end of the intermediate film (1) is 1 m.

[0217] [Method for producing interlayer film (2) (2)]

[0218] Preparation of composition for forming intermediate film (1st layer):

[0219] The following components were mixed and kneaded thoroughly with a mixing roll to obtain a composition for forming an interlayer film.

[0220] 100 parts by weight of polyvinyl acetal resin (average degree of polymerization 1700, hydroxyl content 30.5 mol%, acetylation degree 1.0 mol%, acetalization degree 68.5 mol%)

[0221] 40 parts by weight of triethylene glycol di-2-ethylhexanoate (3GO)

[0222] Tinuvin 326 (2-(2'-hydroxy-3'-tert-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" manufactured by BASF) was present in an amount of 0.2 wt% in the obtained interlayer film.

[0223] In the obtained interlayer film, BHT (2,6-di-tert-butyl-p-cresol) was present in an amount of 0.2 wt %.

[0224] Preparation of intermediate film:

[0225] The composition for forming an intermediate film was extruded using an extruder to obtain an intermediate film (2) having a single-layer structure. The thickness of the intermediate film obtained was 780 μm (constant). The distance between one end and the other end of the intermediate film (2) was 1 m.

[0226] (Example 1)

[0227] (1) Preparation of the intermediate film roll:

[0228] The obtained interlayer film (1) is wound into a roll shape on the outer circumferential surface of a winding core to obtain an interlayer film roll body.

[0229] (2) Preparation of roll packaging body:

[0230] The core of the roll of the interlayer film wound on the core is arranged in such a way that the holding member in the pallet base (1) is located inside the open end of the core. The support member is set on the pallet base (1), and then the top plate member is set. Thus, a roll packaging body is prepared.

[0231] (Examples 2 to 14 and Comparative Examples 1 to 3)

[0232] A roll packaging body was obtained in the same manner as in Example 1 except that the configuration of the roll packaging body was changed as shown in the following table.

[0233] (evaluate)

[0234] (1) Determination of distance and angle

[0235] In the obtained roll packaging body, the following distances (dimensions) and angles were measured, and the following C was determined.

[0236] A: Distance from the second position P2 to the first surface of the tray base (cm)

[0237] B: Distance from the first position P1 to the second position P2 (cm)

[0238] D: Distance from the first position P1 to the first surface of the tray base (cm)

[0239] E: Distance from the third position P3 to the first surface of the tray base (cm)

[0240] θ: Angle formed by the straight line connecting the first position P1 and the second position P2 and the first surface of the pallet base (°)

[0241] It should be noted that the first position P1, the second position P2, and the third position P3 are the following positions.

[0242] First position P1: The position of the outer periphery of the roll where the distance from the outer periphery of the roll to the first surface of the tray base is the shortest

[0243] Second position P2: A position on the outer periphery of the core where the distance from the first position P1 to the outer periphery of the core is shortest

[0244] Third position P3: The position of the outer periphery of the roll where the distance from the outer periphery of the roll to the first surface of the pallet base is the longest

[0245] From the measurement results, the value of C represented by the following formula (C) was calculated. In addition, when the value of C is 0, it means that the roll body is in contact with the pallet base.

[0246] [Formula 5]

[0247]

[0248] (2) Stability of the roll packaging

[0249] The obtained roll packaging body was transported by an elevator. The stability of the roll packaging body was evaluated according to the following criteria. It should be noted that the angle θ in the following evaluation criteria is the angle formed by the straight line connecting the first position P1 and the second position P2 and the first surface of the pallet base.

[0250] <Evaluation Criteria for Stability of Roll Package>

[0251] ○: The angle θ after transport by lift is less than 10°

[0252] △: The angle θ after transport by the lift is 10° or more and less than 20°

[0253] ×: The angle θ after transport by the lift is 20° or more

[0254] (3) Wrinkles in the interlayer film

[0255] The intermediate film in the roll packaging body was visually observed to confirm that wrinkles were generated on the intermediate film. In addition, the roll core and the intermediate film roll were taken out from the roll packaging body, and the intermediate film was unwound from the roll core. It was confirmed whether the intermediate film unwound from the roll core was good. The wrinkles of the intermediate film were evaluated according to the following criteria.

[0256] <Evaluation Criteria for Wrinkles in Interlayer Film>

[0257] ○: No wrinkles were observed on the interlayer film, and the interlayer film could be unwound from the core well.

[0258] △: Some wrinkles were observed on the interlayer film, but the interlayer film could be unwound from the core smoothly.

[0259] ×: Obvious wrinkles were observed on the interlayer film, and the interlayer film could not be properly unwound from the core.

[0260] (4) Optical strain of laminated glass

[0261] Laminated glass is produced by using the interlayer film unwound by the above-mentioned "(3) wrinkling of interlayer film". Specifically, laminated glass is produced by the following steps.

[0262] Preparation of laminated glass:

[0263] The obtained interlayer film was sandwiched between two transparent glasses (300 mm in length and 300 mm in width) with a thickness of 2.5 mm according to JIS R3202:1996 to obtain a laminate. The obtained laminate was placed in a rubber bag, degassed at a vacuum degree of 2.6 kPa for 20 minutes, and then moved into an oven in a degassed state, and then vacuum pressed at 90°C for 30 minutes to pre-press the laminate. The pre-pressed laminate was pressed for 20 minutes in an autoclave at 135°C and a pressure of 1.2 MPa to obtain a laminated glass.

[0264] Determination of optical strain:

[0265] The obtained laminated glass was placed under a fluorescent lamp and the strain was visually confirmed. In addition, the obtained laminated glass was arranged at a position 3m away from the strong light source projector and at a position where the angle formed by the main surface of the laminated glass and the light beam irradiated from the strong light source projector was 20°. In addition, a projection screen was arranged 1.5m behind the laminated glass. Light was irradiated from the strong light source projector, and the strain of the projected image projected on the projection screen was visually observed.

[0266] The optical strain of the laminated glass was evaluated according to the following criteria.

[0267] <Evaluation Criteria for Optical Strain of Laminated Glass>

[0268] ○: No strain was observed under both strong light and fluorescent light.

[0269] △: Slight optical strain was observed under a strong light source, but no strain was observed under a fluorescent light. ×: Strain was observed under both a strong light source and a fluorescent light.

[0270] The compositions and results are shown in Tables 1 to 4 below.

[0271] [Table 1]

[0272]

[0273] [Table 2]

[0274]

[0275] [Table 3]

[0276]

[0277] [Table 4]

[0278]

[0279] Explanation of symbols

[0280] 1. 1A…Tray base

[0281] 1a, 1Aa…1st surface

[0282] 1b, 1Ab…Surface 2

[0283] 2…Core

[0284] 3…Roll (roll of interlayer film)

[0285] 4…Protective cover for roll protection

[0286] 5…Top plate components

[0287] 6…Supporting components

[0288] 11…Tray base body

[0289] 12…Retaining parts

[0290] 12a…Opening

[0291] 13…Buffer material

[0292] 51…Top plate component body

[0293] 52…Retaining parts

[0294] 90, 90A, 90B…Roll packaging

Claims

1. A roll packaging body, comprising: A tray base having a first surface, Core, and A roll of the interlayer film for laminated glass is rolled up on the outer circumferential surface of the winding core into a roll shape, The pallet base comprises a pallet base body and a holding component for holding a winding core. The holding member of the tray base has a portion protruding upward on the first surface side of the tray base. The winding core is held by the holding member of the tray base, The roll packaging body has the following structure (1) or the following structure (2): Configuration (1): the position of the outer periphery of the roll body at which the distance from the outer periphery of the roll body to the first surface of the pallet base is shortest is set as the first position, the position of the outer periphery of the core at which the distance from the first position to the outer periphery of the core is shortest is set as the second position, the distance from the second position to the first surface of the pallet base is set as A, the distance from the first position to the second position is set as B, and when the angle formed by the straight line connecting the first position and the second position and the first surface of the pallet base is set as θ, C represented by the following formula (C) exceeds 0, [Mathematical formula 1] Configuration (2): The pallet base includes the pallet base body, the holding member, and a cushioning material, wherein the upper surface of the cushioning material is the first surface of the pallet base, and the upper surface of the cushioning material is in contact with the roll body. 2 . The roll packaging container according to claim 1 , comprising the configuration (1).

3. The roll packaging body according to claim 2, wherein: The above θ exceeds 0° and is equal to or less than 14.8°.

4. The roll packaging body according to claim 2 or 3, wherein: The A is greater than 0 cm and less than 3 cm.

5. The roll packaging body according to any one of claims 2 to 4, wherein: The absolute value of the difference between the outer diameter of the holding member and the inner diameter of the opening end of the winding core is greater than or equal to 0% and less than or equal to 20% relative to the outer diameter of the holding member. The height of the holding member is greater than or equal to 3 cm and less than or equal to 10 cm.

6. The roll packaging body according to any one of claims 2 to 5, wherein: The B is greater than or equal to 11.32 cm and less than or equal to 28.57 cm.

7. The roll packaging body according to any one of claims 2 to 6, wherein: When the position of the outer periphery of the roll where the distance from the outer periphery of the roll to the first surface of the pallet base is the longest is set as the third position, the distance from the first position to the first surface of the pallet base is set as D, and the distance from the third position to the first surface of the pallet base is set as E, the absolute value of the difference between D and E is less than 9.8 cm.

8. The roll packaging body according to any one of claims 2 to 7, wherein The pallet base comprises the pallet base body, the holding member and a cushioning material. The upper surface of the cushioning material is the first surface of the tray base.

9. The roll packaging body according to claim 8, wherein: The buffer material is a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow board, an environmentally friendly plastic sheet or a paperboard. 10 . The roll packaging container according to claim 1 , comprising the configuration (2).

11. The roll packaging body according to claim 10, wherein: The buffer material is a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow board, an environmentally friendly plastic sheet or a paperboard.

12. The roll packaging body according to any one of claims 1 to 11, wherein The interlayer film for laminated glass has a non-uniform thickness in a width direction of the interlayer film for laminated glass.

13. The roll packaging body according to any one of claims 1 to 12, wherein: The pallet base body comprises iron, resin, stainless steel, aluminum, wood or carton.

14. The roll packaging body according to any one of claims 1 to 13, wherein The core comprises polypropylene, polyethylene, polyvinyl chloride, paper, glass, cloth, wood or fiber reinforced plastic.

Images