CN119137051A - Roll packaging - Google Patents

Abstract

The invention provides a roll package capable of suppressing generation of wrinkles in an intermediate film. A roll package comprising a tray base having a1 st surface, a roll core, and a roll body of an intermediate film for laminated glass wound in a roll shape on the outer circumferential surface of the roll core, wherein the tray base has a tray base body and a holding member for holding the roll core, the holding member of the tray base has a portion protruding upward on the 1 st surface side of the tray base, the roll core is held by the holding member of the tray base, and the roll package comprises a specific structure (1) or a specific structure (2).

Description

Reel package

Technical Field

The present invention relates to a roll package including a tray base, a roll core, and a roll of an intermediate film for laminated glass.

Background

A laminated glass is known in which an interlayer film for laminated glass (hereinafter sometimes simply referred to as an interlayer film) is interposed between a pair of glass plates. The laminated glass has been widely used for vehicles, railway vehicles, spacecraft, ships, buildings, and the like.

The intermediate film is manufactured and then wound around a winding core to form a roll (for example, patent document 1). The roll body is stored in a roll package packed by a predetermined member until the roll body is used.

Prior art literature

Patent literature

Patent document 1 Japanese patent application laid-open No. 2022-015080

Disclosure of Invention

Technical problem to be solved by the invention

It is considered that a roll body of the intermediate film wound on the winding core can be set longitudinally on the tray base to obtain a roll package. As for the step of longitudinally disposing the roll of intermediate film on the tray base, for example, the following is mentioned. (1) A tray base having a holding member for holding a winding core is prepared. (2) A roll body of the intermediate film wound around the roll core is prepared, and the roll core around which the intermediate film is wound is vertically set on the tray base so that the holding member is positioned inside the open end of the roll core. From the standpoint of ease of handling the winding core in the longitudinal direction of the tray base, the inner diameter of the open end of the winding core is relatively larger than the outer diameter of the holding member, and a gap exists between the inner circumferential surface of the open end of the winding core and the outer circumferential surface of the holding member.

Therefore, the roll of the intermediate film cannot stand in a state completely perpendicular to the upper surface of the tray base (a state in which the axis direction of the roll core makes an angle of 90 ° with the upper surface of the tray base), and the roll of the intermediate film is inclined, and the tray base contacts the roll of the intermediate film. When the tray base contacts with the roll of intermediate film, wrinkles may occur in the intermediate film.

When laminated glass is produced using an interlayer film having wrinkles, foaming and optical strain occur in the laminated glass.

The invention aims to provide a roll package capable of inhibiting the generation of wrinkles in an intermediate film.

Technical means for solving the problems

In the present specification, the following roll package is disclosed.

A roll package comprising a tray base having a1 st surface, a roll core, and a roll of an intermediate film for laminated glass wound in a roll shape on an outer circumferential surface of the roll core, wherein the tray base has a tray base body and a holding member for holding the roll core, the holding member of the tray base has a portion protruding upward on the 1 st surface side of the tray base, the roll core is held by the holding member of the tray base,

The roll package comprises the following structure (1) or the following structure (2):

The structure (1) is such that when the position of the outer periphery of the roll body from the outer periphery of the roll body to the 1 st surface of the tray base is set to the 1 st position, the position of the outer periphery of the roll core from the 1 st position to the outer periphery of the roll core is set to the 2 nd position, the distance from the 2 nd position to the 1 st surface of the tray base is set to A, the distance from the 1 st position to the 2 nd position is set to B, and the angle formed by the straight line connecting the 1 st position and the 2 nd position and the 1 st surface of the tray base is set to θ, C represented by the following formula (C) exceeds 0.

[ Mathematics 1]

The tray base is provided with the tray base main body, the holding member and the buffer material, wherein the upper surface of the buffer material is the 1 st surface of the tray base, and the upper surface of the buffer material is in contact with the coil body.

Item 2. The roll package according to item 1, which is provided with the above-described constitution (1).

Item 3. The roll package of item 2, wherein,

The θ exceeds 0 ° and is 14.8 ° or less.

Item 4. The roll package of item 2 or 3, wherein,

The A exceeds 0cm and is less than 3 cm.

The roll package according to any one of items 2 to 4, wherein,

The ratio of the absolute value of the difference between the outer diameter of the holding member and the inner diameter of the open end of the winding core to the outer diameter of the holding member is 0% to 20%, and the height of the holding member is 3cm to 10 cm.

The roll package according to any one of items 2 to 5, wherein,

The distance B is 11.32cm or more and 28.57cm or less.

The roll package according to any one of items 2 to 6, wherein,

The position of the outer periphery of the roll body from the outer periphery of the roll body to the 1 st surface of the tray base, where the distance from the 1 st position to the 1 st surface of the tray base is set to be the 3 rd position, the distance from the 1 st position to the 1 st surface of the tray base is set to be D, and the distance from the 3 rd position to the 1 st surface of the tray base is set to be E, wherein the absolute value of the difference between D and E is 9.8cm or less.

The roll package according to any one of items 2 to 7, wherein,

The tray base has the tray base main body, the holding member, and a cushioning material, an upper surface of which is the 1 st surface of the tray base.

Item 9. The roll package of item 8, wherein,

The buffer material is a polypropylene sheet, a foaming polypropylene sheet, a polycarbonate sheet, a plastic hollow plate, an environment-friendly plastic sheet or a paperboard.

Item 10. The roll package according to item 1, which is provided with the above-described constitution (2).

Item 11. The roll package of item 10, wherein,

The buffer material is a polypropylene sheet, a foaming polypropylene sheet, a polycarbonate sheet, a plastic hollow plate, an environment-friendly plastic sheet or a paperboard.

The roll package according to any one of items 1 to 11, wherein,

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

The roll package according to any one of items 1 to 12, wherein,

The tray base body comprises iron, resin, stainless steel, aluminum, wood, or cardboard.

The roll package according to any one of items 1 to 13, wherein,

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

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a roll package capable of suppressing the occurrence of wrinkles in an intermediate film can be provided.

Drawings

Fig. 1 is a front view showing a roll package according to embodiment 1 of the present invention.

Fig. 2 (a) and (b) are a plan view and a cross-sectional view, respectively, showing example 1 of a tray base that can be used in the present invention.

Fig. 3 is a view for explaining a specific distance or a specific angle in the roll package according to embodiment 1 of the present invention.

Fig. 4 is a front view showing a roll package according to embodiment 2 of the present invention.

Fig. 5 (a) and (b) are a plan view and a cross-sectional view, respectively, showing example 2 of a tray base that can be used in the present invention.

Fig. 6 is a view for explaining a specific distance or a specific angle in the roll package according to embodiment 2 of the present invention.

Fig. 7 is a front view showing a roll package according to embodiment 3 of the present invention.

Detailed Description

A roll package of the present invention comprises a tray base having a 1 st surface, a roll core, and a roll of an intermediate film for laminated glass wound in 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 1 st surface side of the tray base. In the roll package of the present invention, the winding core is held by the holding member of the tray base.

The roll package of the present invention comprises the following configuration (1) or the following configuration (2). The roll package of the present invention may have the following configuration (1) or the following configuration (2).

The structure (1) is that the position of the outer periphery of the coil body from the outer periphery of the coil body to the 1 st surface of the tray base is set as a1 st position, and the position of the outer periphery of the coil core from the 1 st position to the outer periphery of the coil core is set as a2 nd position. The distance from the 2 nd position to the 1 st surface of the tray base is a, the distance from the 1 st position to the 2 nd position is B, and an angle formed by a straight line connecting the 1 st position and the 2 nd position and the 1 st surface of the tray base is θ. At this time, C represented by the following formula (C) exceeds 0.

[ Math figure 2]

The tray base is provided with the tray base main body, the holding member and the buffer material, wherein the upper surface of the buffer material is the 1 st surface of the tray base, and the upper surface of the buffer material is in contact with the coil body.

The roll package of the present invention has the above-described configuration, and therefore, occurrence of wrinkles in the intermediate film can be suppressed.

Therefore, in the case of producing laminated glass using an intermediate film unwound from the roll package of the present invention, foaming may not easily occur and optical strain may not easily occur in the laminated glass.

Hereinafter, preferred embodiments of the present invention will be described while referring to the accompanying drawings. However, the following embodiments are merely examples, and the present invention is not limited to the following embodiments. In the drawings, components having substantially the same function may be referred to by the same reference numerals.

Hereinafter, the roll package of the present invention will be described with reference to fig. 1 to 7.

(Embodiment 1: roll packaging body comprising component (1))

Fig. 1 is a front view showing a roll package according to embodiment 1 of the present invention. Fig. 1 is a front view showing a roll package having the structure (1).

The roll package 90 shown in fig. 1 includes a tray base 1, a roll core 2, an intermediate film roll 3, a roll protective cover 4, a top plate member 5, and a support member 6. For convenience of explanation, the roll protecting cover 4 is shown by a broken line in fig. 1, and the roll 3 and other members disposed inside the roll protecting cover 4 are also illustrated. For convenience of explanation, the holding members 12 of the tray base 1 and the holding members 52 of the top plate member 5, which are present inside the open end of the winding core 2, are shown by broken lines in fig. 1.

The tray base 1 has a tray base main body 11 and a holding member 12 for holding the winding cores. Further, the tray base 1 has a1 st surface 1a and a 2 nd surface 1b. The 1 st surface 1a and the 2 nd surface 1b refer to surfaces opposed to each other in the tray base 1. The holding member 12 has a portion protruding upward on the 1 st surface 1a side.

The winding core 2 has openings at both ends. The winding core 2 has an open end.

The winding core 2 is arranged such that the holding member 12 is positioned inside the open end of the winding core 2. Therefore, the winding core 2 is held by the holding member 12. The inner diameter of the open end of the winding core 2 is larger than the outer diameter of the holding member 12.

The intermediate film is wound around the outer circumferential surface of the winding core 2 in a roll shape, and is a roll 3 of the intermediate film. The intermediate film is wound in a roll shape on the outer circumferential surface from which both end portions of the winding core 2 are removed. Therefore, the roll 3 is longitudinally disposed on the tray base 1.

In the roll package 90, the 1 st surface 1a of the tray base 1 is not in contact with the roll 3.

The roll protective cover 4 is a protective cover covering the outer surface of the roll 3. The outer surface of the roll 3 is covered with a roll protective cover 4.

The top plate member 5 is a member covering the upper portion of the roll body 3.

The support member 6 is a member that supports the tray base 1 and the top plate member 5.

First, referring to fig. 2, a description will be given of the tray base 1. Fig. 2 (a) and (b) are a plan view and a cross-sectional view, respectively, showing example 1 of a tray base that can be used in the present invention. Fig. 2 (b) is a sectional view taken along the line I-I in fig. 2 (a).

The tray base 1 has a tray base main body 11 and a holding member 12. Further, the tray base 1 has a1 st surface 1a and a2 nd surface 1b. The 1 st surface 1a and the 2 nd surface 1b refer to surfaces opposed to each other in the tray base 1. The 1 st surface 1a is an upper main surface of the tray base 1. The 2 nd surface 1b is a lower main surface of the tray base 1. The 2 nd surface 1b of the tray base 1 is a surface that contacts a mounting surface such as the ground.

In the tray base 1, the upper surface of the tray base body 11 is the 1 st surface 1a of the tray base 1. In the tray base 1, the lower surface of the tray base body 11 is the 2 nd surface 1b of the tray base 1. In order to reduce the weight of the tray base main body 11, there may be a gap. Therefore, there is a case where a gap is provided on the upper surface of the tray base main body 11. The upper surface of the tray base main body 11 is an upper surface in a case where there is a gap in the upper surface, and in a case where there is no gap in the upper surface of the tray base main body 11. The 1 st surface 1a of the tray base 1 is the upper surface of the tray base body 11 in the case where there is a gap in the upper surface of the tray base body 11, and in the case where there is no gap in the upper surface of the tray base body 11.

The size, shape, and material of the tray base main body 11 are not particularly limited as long as the roll body can mount the roll core and the intermediate film. As the tray base main body 11, a conventionally known member known as a tray can be used. The tray base body 11 may be a three-dimensional group formed by assembling a plurality of frames.

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

As for the tray base main body 11, for example, iron, resin, stainless steel, aluminum, wood, or cardboard is contained. The iron may be a plated iron. Examples of the resin include polypropylene.

The holding member 12 has been mounted to the tray base main body 11. The holding member 12 may be detachable from the tray base body 11 or may be non-detachable. The holding member 12 and the tray base main body 11 may be separable or may be inseparable.

The holding member 12 has a portion protruding upward on the 1 st surface 1a side of the tray base 1. The upper surface of the holding member 12 is located at a position above the 1 st surface 1a of the portion other than the holding member 12 of the tray base 1. The holding member 12 has an opening 12a. By providing the holding member 12 with the opening 12a, the weight of the tray base 1 can be reduced as compared with the case where the opening 12a is not provided. When the roll package 90 is prepared, the inner side of the open end of the winding core 2 is disposed outside the holding member 12 (outside the opening 12a of the holding member 12). In the roll package 90, the inner side of the lower open end of the winding core 2 is disposed outside the holding member 12 (outside the opening 12a of the holding member 12). When the tray base 1 is formed in a plan view, the holding member 12 has a circular outer shape. However, when the tray base 1 is formed in a plan view, the outer shape of the holding member 12 may be other than a circular shape. The shape of the holding member 12 is not particularly limited as long as it can hold the winding core 2.

The outer diameter of the holding member 12 is smaller than the inner diameter of the open end of the winding core 2. The ratio of the absolute value of the difference between the outer diameter of the holding member 12 and the inner diameter of the open end of the winding core 2 to the outer diameter of the holding member 12 is preferably 0% or more, more preferably 4% or more, and preferably 20% or less, more preferably 15% or less. The ratio is expressed by the formula [ (absolute value of the difference between the outer diameter of the holding member 12 and the inner diameter of the open end of the winding core 2)/the outer diameter of the holding member 12 ] ×100. When the ratio is equal to or greater than the lower limit, the holding member 12 is easily disposed inside the open end of the winding core 2 when the roll package 90 is manufactured, and thus the operation of vertically disposing the winding core 2 on the tray base can be easily performed. When the ratio is equal to or less than the upper limit, the inclination of the intermediate film roll 3 can be effectively suppressed, and the effects of the present invention can be further effectively exhibited.

The height of the holding member 12 is preferably 3cm or more, more preferably 4cm or more, and preferably 10cm or less, more preferably 9cm or less. When the height of the holding member 12 is equal to or greater than the lower limit and equal to or less than the upper limit, the inclination of the intermediate film roll 3 can be effectively suppressed, and the effects of the present invention can be further effectively exhibited. The height of the holding member 12 is a distance from the upper surface of the tray base main body 11 to the upper surface of the holding member 12.

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 resin holding member 12 may be made of a foamed resin.

The tray base body 11 may be made of the same material as the holding member 12 or may be made of different materials.

The tray base 1 has two holding members 12. The tray base 1 may have only one holding member 12, may have two or more.

At four corners of the 1 st surface 1a of the tray base 1, members extending upward from the 1 st surface 1a may be provided, and members for holding the support members 6 may be disposed.

Next, with reference to fig. 3, a description will be given of a configuration (1) in the roll package 90.

In fig. 3, the roll package 90 is illustrated with the tray base 1, the winding core 2, and the winding body 3 as necessary components for explaining the configuration (1). For convenience of explanation, the holding member 12 disposed inside the open end of the winding core 2 is shown by a broken line.

The position of the outer periphery of the roll 3, from the outer periphery of the roll 3 to the 1 st surface 1a of the tray base 1, where the distance is shortest, is set as the 1 st position P1. The position of the outer periphery of the winding core 2 where the distance from the 1 st position P1 to the outer periphery of the winding core 2 is shortest is set as the 2 nd position P2. The position of the outer periphery of the roll 3 having the longest distance from the outer periphery of the roll 3 to the 1 st surface 1a of the tray base 1 is set as a 3 rd position P3. The position of the intersection of the straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface 1a of the tray base 1 is set as the 4 th position P4.

The distance from the 2 nd position P2 to the 1 st surface 1a of the tray base 1 is set to a (cm). The distance from the 1 st position P1 to the 2 nd position P2 is set to B (cm). The distance from the 1 st position P1 to the 1 st surface 1a of the tray base 1 is set to D (cm). The distance from the 3 rd position P3 to the 1 st surface 1a of the tray base 1 is set to E (cm).

An angle formed by a straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface 1a of the tray base 1 is set to θ.

In the roll package 90 having the above-described configuration (1), C represented by the following formula (C) exceeds 0. Therefore, the roll package 90 can suppress the occurrence of wrinkles in the intermediate film.

[ Math 3]

The distance C is generally a distance from the 1 st position P1 to the 4 th position P4, and is a distance (cm) indicated by C in fig. 3.

In the roll package 90 having the above configuration (1), C represented by the above formula (C) exceeds 0cm, preferably 0.5cm or more. When C represented by the formula (C) is not less than the lower limit, the effect of the present invention can be further effectively exhibited. The C represented by the formula (C) may be 160cm or less, 100cm or less, 75cm or less, 70cm or less, 60cm or less, 55cm or less, 30cm or less, 20cm or less, 10cm or less, or 5cm or less.

The roll 3 cannot stand in a state perpendicular to the 1 st surface 1a of the tray base 1 (a state in which the axial direction of the roll core 2 forms an angle of 90 ° with the 1 st surface 1a of the tray base 1). The roll body 3 is left standing in a state where the roll body is inclined (a state where the axial direction of the roll core 2 forms an angle of less than 90 ° with the 1 st surface 1a of the tray base 1). Wherein the roll 3 is left to stand so that C represented by the formula (C) exceeds 0.

The a is the distance from the 2 nd position P2 to the 1 st surface 1a of the tray base 1. The A is preferably more than 0cm, more preferably 0.5cm or more, and preferably 3cm or less, more preferably 2.5cm or less. When a is not less than the lower limit and not more than the upper limit, the effect of the present invention can be further effectively exhibited.

The B is the distance from the 1 st position P1 to the 2 nd position P2. The distance B is preferably 11.32cm or more, more preferably 15.00cm or more, and preferably 28.60cm or less, more preferably 28.57cm or less, and even more preferably 25.00cm or less. When B is not less than the lower limit and not more than the upper limit, the effects of the present invention can be further effectively exhibited. The larger the B is, the more easily wrinkles are generated in the roll of the intermediate film, but in the present invention, even if the B is relatively large, the wrinkles are effectively suppressed from being generated in the roll of the intermediate film.

The D is the distance from the 1 st position P1 to the 1 st surface 1a of the tray base 1. In the roll package 90 having the above configuration (1), D exceeds 0cm. The D is preferably 0.5cm or more, more preferably 1.0cm or more, and preferably 9.8cm or less, more preferably 9.0cm or less. When D is not less than the lower limit and not more than the upper limit, the effect of the present invention can be further effectively exhibited.

The E is the distance from the 3 rd position P3 to the 1 st surface 1a of the tray base 1. In the roll package 90 having the above configuration (1), the E exceeds 0cm. The E is preferably 0.5cm or more, more preferably 1.0cm or more, and preferably 9.8cm or less, more preferably 9.0cm or less. When E is not less than the lower limit and not more than the upper limit, the effect of the present invention can be further effectively exhibited.

Typically, the D is smaller than the E.

The absolute value of the difference between D and E is preferably 0.5cm or more, more preferably 1.3cm or more, and preferably 9.8cm or less, more preferably 8.2cm or less. When the absolute value of the difference is equal to or greater than the lower limit and equal to or less than the upper limit, the effect of the present invention can be further effectively exhibited.

The θ is an angle formed by a straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface 1a of the tray base 1. The θ preferably exceeds 0 °, more preferably 2 ° or more, and is preferably 14.8 ° or less, more preferably 12 ° or less. When θ is not less than the lower limit and not more than the upper limit, the effects of the present invention can be further effectively exhibited.

Next, the winding core 2 will be described.

As the winding core 2, a conventionally known winding core can be used. The winding core 2 has a cylindrical shape with openings at both ends. The winding core 2 has an open end. 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 held by the holding member 12. The winding core 2 may be cylindrical, for example, and may have a cylindrical shape with openings at both ends, or may have a shape other than these.

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

As the winding core 2, for example, polypropylene, polyethylene, polyvinyl chloride, paper, glass, cloth, wood, or fiber-reinforced plastic is contained. The wood may be bamboo.

Next, the roll body 3 and an intermediate film constituting the roll body 3 will be described.

As the intermediate film, a conventionally known intermediate film can be used. The intermediate film has a 1-layer structure or a structure of 2 or more layers. The intermediate film may have a 1-layer structure, may have a 2-layer structure, and may have a structure of 2 or more layers. The interlayer film may have a 3-layer structure, may have a structure of 3 or more layers, may have a 4-layer structure, may have a structure of 4 or more layers, may have a 5-layer structure, and may have a structure of 5 or more layers. The intermediate film may have a structure of 10 layers or less, and may have a structure of 5 layers or less. The intermediate film may be provided with only layer 1. The intermediate film may include a 1 st layer and a 2 nd layer disposed on the 1 st surface side of the 1 st layer. The interlayer film may include a 1 st layer, a 2 nd layer disposed on a 1 st surface side of the 1 st layer, and a 3 rd layer disposed on a 2 nd surface side opposite to the 1 st surface of the 1 st layer.

The intermediate film may contain a thermoplastic resin, or may contain a thermoplastic resin and a plasticizer. The intermediate film may include a layer including a thermoplastic resin, and may include a layer including a thermoplastic resin and a plasticizer. The 1 st layer preferably comprises a thermoplastic resin, preferably a thermoplastic resin and a plasticizer. The 2 nd layer preferably comprises a thermoplastic resin, preferably a thermoplastic resin and a plasticizer. The 3 rd layer preferably comprises a thermoplastic resin, preferably a thermoplastic resin and a plasticizer.

Examples of the thermoplastic resin include a polyvinyl acetal resin, an ethylene-vinyl acetate copolymer resin, an ethylene-acrylic acid copolymer resin, a polyurethane resin, a (meth) acrylic resin, a polyolefin resin, an ionomer resin, and a polyvinyl alcohol resin. Thermoplastic resins other than these may be used. The thermoplastic resin may be used alone or in combination of two or more.

The plasticizer is not particularly limited. As the plasticizer, a conventionally known plasticizer can be used. Examples of the plasticizer include organic ester plasticizers such as mono-organic acid esters and poly-organic acid esters, organic phosphoric acid plasticizers, and organic phosphorous acid plasticizers. The plasticizer is preferably an organic ester plasticizer. The plasticizer is preferably a liquid plasticizer. The plasticizer may be used alone or in combination of two or more.

The interlayer film may contain a heat insulating substance, an ultraviolet absorber, an antioxidant, a colorant, a coupling agent, a dispersant, a surfactant, a flame retardant, an antistatic agent, an adhesion regulator (alkali metal salt, alkaline earth metal salt, etc.), a moisture-proof agent, an optical brightening agent, an infrared absorber, and other components. The other components may be used singly or in combination of two or more kinds

The intermediate film may have a uniform thickness or may have a non-uniform thickness in the width direction of the intermediate film. In the intermediate film having a non-uniform thickness in the width direction of the intermediate film, wrinkles are likely to occur in the roll of the intermediate film, but in the present invention, the occurrence of wrinkles in the roll of the intermediate film can be effectively suppressed even in the intermediate film having a non-uniform thickness.

The winding diameter of the winding body 3 may be constant or may be different along the axial direction of the winding core 2. In the roll body 3, the roll diameter of the end portion on the pallet base 1 side may be different from the roll diameter of the end portion on the top plate member 5 side. In the roll body 3, the roll diameter of the end portion on the pallet base 1 side may be larger or smaller than the roll diameter of the end portion on the top plate member 5 side. In the case of an intermediate film having a thickness that is not uniform in the width direction of the intermediate film, the winding diameter of the winding body 3 is generally different between the end on the pallet base 1 side and the end on the top plate member 5 side.

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

The roll diameter of the roll 3 refers to the outer diameter of the roll 3.

Next, the roll protecting cover 4 will be described.

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

The roll protecting cover 4 preferably covers the entire outer circumferential surface of the roll 3. The roll protective cover 4 may or may not be in contact with the outer circumferential surface of the roll 3.

The roll protective cover 4 may be made of resin, paper, aluminum, or a composite material of these.

The roll-protecting cover 4 may not be used.

Next, the top plate member 5 will be described.

The top plate member 5 has 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.

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

The holding member 52 is attached to the top plate member main body 51. The holding member 52 may be detachable from the top plate member body 51, or may be non-detachable. The holding member 52 may be separable from the top plate member main body 51, or may be inseparable.

The holding member 52 has a portion protruding downward on the lower surface side of the top plate member main body 51. The holding member 52 has an opening. By providing the holding member 52 with an opening, the top plate member 5 can be reduced in weight as compared with the case where the holding member does not have an opening. When the roll package 90 is prepared, the inner side of the open end of the winding core 2 is disposed outside the holding member 52 (outside the opening of the holding member 52). In the roll package 90, the inner side of the upper open end of the winding core 2 is disposed outside the holding member 52 (outside the opening of the holding member 52). The holding member 52 has a circular outer shape when the top plate member 5 is viewed from the lower side. However, the outer shape of the holding member 52 may be other than a circular shape when the top plate member 5 is viewed from the lower side. The shape of the holding member 52 is not particularly limited as long as the shape of the winding core 2 can be held.

The outer diameter of the holding member 52 is smaller than the inner diameter of the open end of the winding core 2. The ratio of the absolute value of the difference between the outer diameter of the holding member 52 and the inner diameter of the open end of the winding core 2 to the outer diameter of the holding member 52 is preferably 0% or more, more preferably 4% or more, and preferably 20% or less, more preferably 15% or less. The ratio is expressed by the formula [ (absolute value of the difference between the outer diameter of the holding member 52 and the inner diameter of the open end of the winding core 2)/the outer diameter of the holding member 52 ] ×100. When the ratio is equal to or greater than the lower limit, the holding member 52 is easily disposed inside the open end of the winding core 2 when the roll package 90 is manufactured. When the ratio is equal to or less than the upper limit, the inclination of the intermediate film roll 3 can be effectively suppressed, and the effects of the present invention can be further effectively exhibited.

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 resin holding member 52 may be made of a foamed resin.

The material of the top plate member main body 51 may be the same as or different from the material of the holding member 52.

The top plate member main body 51 has two holding members 52. The top plate member main body 51 may have only one holding member 52, may have two or more.

Next, the supporting member 6 will be described.

The support member 6 is, for example, a metal member. The support members 6 are provided at four corners of the tray base 1. The tray base 1 and the top plate member 5 are connected by the support member 6. From the viewpoint of stably supporting the tray base 1 and the top plate member 5, it is preferable to use 4 or more support members 6, and more preferably 8 or more support members 6, with respect to one tray base 1. As the support member 6, a conventionally known support member can be used.

(Embodiment 2: roll packaging body comprising component (1))

Fig. 4 is a front view showing a roll package according to embodiment 2 of the present invention. Fig. 4 is a front view showing a roll package having the structure (1).

The roll package 90A shown in fig. 4 includes a tray base 1A, a roll core 2, an intermediate film roll 3, a roll protective cover 4, a top plate member 5, and a support member 6. The roll package 90 shown in fig. 1 is different from the roll package 90A shown in fig. 4 in the structure of the tray base. For convenience of explanation, the roll protecting cover 4 is shown by a broken line in fig. 4, and the roll 3 and other members disposed inside the roll protecting cover 4 are also illustrated. For convenience of explanation, the holding members 12 of the tray base 1A and the holding members 52 of the top plate member 5, which are present inside the open end of the winding core 2, are indicated by broken lines in fig. 4. In fig. 4, unlike fig. 1, one roll 3 is shown in the two roll 3 portions.

The tray base 1A has a tray base main body 11, a holding member 12 for holding the winding cores, and a buffer material 13. Further, the tray base 1A has a1 st surface 1Aa and a2 nd surface 1Ab. The 1 st surface 1Aa and the 2 nd surface 1Ab refer to surfaces opposing each other in the tray base 1A. The holding member 12 has a portion protruding upward on the 1 st surface 1Aa side.

The winding core 2 has openings at both ends. The winding core 2 has an open end.

The winding core 2 is disposed such that the holding member 12 is provided inside the open end of the winding core 2. Therefore, the winding core 2 is held by the holding member 12. The inner diameter of the open end of the winding core 2 is larger than the outer diameter of the holding member 12. In the roll package 90A, a part of the lower end of the roll core 2 may be located above the 1 st surface 1Aa of the tray base 1A. In the roll package 90A, the entirety of the lower end of the winding core 2 may be present at a position lower than the 1 st surface 1Aa of the tray base 1A.

The intermediate film is wound around the outer circumferential surface of the winding core 2 in a roll shape, and is a roll 3 of the intermediate film. The intermediate film is wound in a roll shape on the outer circumferential surface from which both end portions of the winding core 2 are removed. Therefore, the roll 3 is longitudinally set on the tray base 1A.

In the roll package 90A, the 1 st surface 1Aa of the tray base 1A is not in contact with the roll 3.

The preferred configurations of the winding core 2, the winding body 3, the winding body protecting cover 4, the top plate member 5, and the supporting member 6 in the winding drum package 90A are as described in "embodiment 1", and therefore, description thereof is omitted.

Next, referring to fig. 5, a description will be given of the tray base 1A. Fig. 5 (a) and (b) are a plan view and a cross-sectional view showing example 2 of a tray base usable in the present invention, respectively. Fig. 5 (b) is a sectional view taken along the line I-I in fig. 5 (a).

The tray base 1A has a1 st surface 1Aa. The tray base 1A has a tray base main body 11, a holding member 12, and a buffer material 13. The tray base 1A has a1 st surface 1Aa and a2 nd surface 1Ab. The 1 st surface 1Aa and the 2 nd surface 1Ab refer to surfaces opposing each other in the tray base 1A. The 2 nd surface 1Ab of the tray base 1A is a surface that contacts a mounting surface such as the ground. The 1 st surface 1Aa is an upper main surface of the tray base 1A. The 2 nd surface 1Ab is a lower main surface of the tray chassis 1A.

The preferred configuration and the like of the tray base body 11 and the holding member 12 in the tray base 1A are as described in the above "embodiment 1", and therefore description thereof is omitted.

In the tray base 1A, a buffer 13 is disposed on the upper surface of the tray base body 11. In the tray base 1A, the upper surface of the cushioning material 13 is the 1 st surface 1Aa of the tray base 1A.

The material of the buffer material 13 is not particularly limited as long as it functions as a buffer material. The hardness of the cushioning material 13 is preferably smaller than that of the tray base main body 11. The cushioning material 13 preferably has higher flexibility than the tray base main body 11. The cushioning material 13 preferably has a cushioning property higher than that of the tray base main body 11.

The cushioning material 13 is preferably a polypropylene sheet, a foamed polypropylene sheet, a polycarbonate sheet, a plastic hollow plate, an environmentally friendly plastic sheet or a cardboard from the viewpoint of effectively suppressing the occurrence of wrinkles in the intermediate film when the cushioning material 13 is in contact with the roll body 3.

The thickness of the cushioning material 13 may be 1mm or more, may be 5mm or more, may be 15mm or less, and may be 10mm or less.

The tray base 1A has 1 sheet of cushioning material 13. The tray base 1A may have 1 or more pieces of the cushioning material 13, may have 2 or more pieces, and may have 2 or more pieces. In the tray base 1A, 2 or more pieces of cushioning material 13 may be stacked on the upper surface of the tray base body 11. In this case, the thickness and the kind of the cushioning material 13 may be the same or different for 2 or more sheets.

When the tray base 1A has 2 or more pieces of the cushioning material 13, the total thickness of the cushioning material 13 may be 1mm or more, may be 5mm or more, may be 15mm or less, and may be 10mm or less.

Next, with reference to fig. 6, a description will be given of a configuration (1) in the roll package 90A.

In fig. 6, a roll package 90A is shown with a tray base 1A, a winding core 2, and a winding body 3 as necessary components for explaining the configuration (1). For convenience of explanation, the holding member 12 disposed inside the open end of the winding core 2 is shown by a broken line. For convenience of illustration, a lower end portion of the winding core 2 (a lower end portion of the winding core 2 disposed inside the cushioning material 13) which cannot be visually confirmed in a front view of the roll package 90A is also shown.

As described above, in the tray base 1A, the upper surface of the cushioning material 13 is the 1 st surface 1Aa of the tray base 1A.

The position of the outer periphery of the roll 3 where the distance from the outer periphery of the roll 3 to the 1 st surface 1Aa of the tray base 1A is shortest is set as the 1 st position P1. The position of the outer periphery of the winding core 2 where the distance from the 1 st position P1 to the outer periphery of the winding core 2 is shortest is set as the 2 nd position P2. The position of the outer periphery of the roll 3 having the longest distance from the outer periphery of the roll 3 to the 1 st surface 1Aa of the tray base 1A is set as a 3 rd position P3. The position of the intersection of the straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface 1Aa of the tray base 1A is set as the 4 th position P4.

The distance from the 2 nd position P2 to the 1 st surface 1Aa of the tray base 1A is set to a (cm). The distance from the 1 st position P1 to the 2 nd position P2 is set to B (cm). The distance from the 1 st position P1 to the 1 st surface 1Aa of the tray base 1A is set to D (cm). The distance from the 3 rd position P3 to the 1 st surface 1Aa of the tray base 1A is set to E (cm).

An angle formed by a straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface 1Aa of the tray base 1A is set to θ.

In the roll package 90A having the above-described configuration (1), C represented by the following formula (C) exceeds 0. Therefore, the occurrence of wrinkles in the intermediate film can be suppressed in the roll package 90A.

[ Mathematics 4]

The distance C is generally a distance from the 1 st position P1 to the 4 th position P4, and is a distance (cm) indicated by C in fig. 6.

In the roll package 90A, the preferred configurations of a, B, C, D, E, and θ are as described in "embodiment 1", and therefore description thereof is omitted.

(Embodiment 3: roll packaging body comprising component (2))

Fig. 7 is a front view showing a roll package according to embodiment 3 of the present invention. Fig. 7 is a front view showing a roll package having the structure (2).

The roll package 90B shown in fig. 7 includes a tray base 1A, a roll core 2, an intermediate film roll 3, a roll protective cover 4, a top plate member 5, and a support member 6. For convenience of explanation, the roll protecting cover 4 is shown by a broken line in fig. 7, and the roll 3 and other members disposed inside the roll protecting cover 4 are also illustrated. For convenience of explanation, the holding members 12 of the tray base 1A and the holding members 52 of the top plate member 5, which are present inside the open end of the winding core 2, are shown by broken lines in fig. 7. In fig. 7, unlike fig. 1, one roll 3 is shown in the two roll 3 portions.

The tray base 1A has a tray base main body 11, a holding member 12 for holding the winding cores, and a buffer material 13. Further, the tray base 1A has a1 st surface 1Aa and a2 nd surface 1Ab. The 1 st surface 1Aa and the 2 nd surface 1Ab refer to surfaces opposing each other in the tray base 1A. The holding member 12 has a portion protruding upward on the 1 st surface 1Aa side. In the tray base 1A, a buffer 13 is disposed on the upper surface of the tray base body 11. In the tray base 1A, the upper surface of the cushioning material 13 is the 1 st surface 1Aa of the tray base 1A.

The winding core 2 has openings at both ends. The winding core 2 has an open end.

The winding core 2 is disposed such that the holding member 12 is provided inside the open end of the winding core 2. Therefore, the winding core 2 is held by the holding member 12. The inner diameter of the open end of the winding core 2 is larger than the outer diameter of the holding member 12. In the roll package 90B, a part of the lower end of the roll core 2 may be located above the 1 st surface 1Aa of the tray base 1A. In the roll package 90B, the entirety of the lower end of the winding core 2 may be present at a position lower than the 1 st surface 1Aa of the tray base 1A.

The intermediate film is wound around the outer circumferential surface of the winding core 2 in a roll shape, and is a roll 3 of the intermediate film. The intermediate film is wound in a roll shape on the outer circumferential surface from which both end portions of the winding core 2 are removed. Therefore, the roll 3 is longitudinally set on the tray base 1A.

Unlike the roll package 90A shown in fig. 4, the roll package 90B shown in fig. 7 has the 1 st surface 1Aa (upper surface of the cushioning material 13) of the tray base 1A in contact with the roll body 3.

Since the roll package 90B having the structure (2) includes the cushioning material 13, the 1 st 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 occurrence of wrinkles in the intermediate film can be effectively suppressed.

The preferred configurations of the winding core 2, the winding body 3, the winding body protecting cover 4, the top plate member 5, and the supporting member 6 in the winding drum package 90B are as described in "embodiment 1", and therefore, description thereof is omitted. The preferred structure and the like of the tray base 1A in the roll package 90B are as described in "embodiment 2", and therefore, description thereof is omitted.

(Other details of roll Package)

The roll package of the present invention includes the tray base, the roll core, and the roll of intermediate film. The roll package of the present invention includes the above-described structure (1) or the above-described structure (2).

The roll package of the present invention may or may not be provided with the protective cover. The roll package of the present invention may be provided with or without the top plate member. The roll package of the present invention may be provided with or without the support member.

The roll package of the present invention may include components other than the above components (tray base, winding core, winding body protecting cover, top plate component, and supporting component). For example, the roll package of the present invention may wind a sheet so as to cover the winding core, the winding body, and the supporting member. The roll package of the present invention may be packaged with a sheet so as to cover the winding core, the winding body, and the support member.

In the roll package according to the present invention having the configuration (1), the tray base may be a tray base having the tray base body and the holding member, and may be a tray base having the tray base body, the holding member, and the cushioning material.

The intermediate film may be an extrusion molded article. The intermediate film preferably has an MD direction and a TD direction. The MD direction is the flow direction of the intermediate film at the time of intermediate film production. The TD direction is a direction orthogonal to the flow direction of the intermediate film at the time of the intermediate film production, and is a direction orthogonal to the thickness direction of the intermediate film. The intermediate film is wound in a roll shape on the outer circumferential surface of the winding core generally along the MD direction.

The interlayer film for laminated glass is used to obtain laminated glass (use of the interlayer film 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 used by being cut into the size of laminated glass. The roll of the interlayer film for laminated glass is used to obtain laminated glass (use of the roll of the interlayer film for laminated glass). The roll of the interlayer film for laminated glass is a roll suitable for obtaining laminated glass. The intermediate film roll for laminated glass is cut into the size of laminated glass for use. The laminated glass includes a1 st laminated glass member, a2 nd laminated glass member, and the interlayer film. In the laminated glass, the interlayer film is disposed between the 1 st laminated glass member and the 2 nd laminated glass member.

The 1 st laminated glass member is preferably a1 st glass plate. The 2 nd laminated glass member is preferably a 2 nd glass plate.

Examples of the 1 st and 2 nd laminated glass members include glass sheets and PET (polyethylene terephthalate) films. The laminated glass includes not only laminated glass having an interlayer film sandwiched between 2 glass plates, but also laminated glass having an interlayer film sandwiched between a glass plate and a PET film or the like. The laminated glass is a laminate comprising glass plates, and preferably at least 1 glass plate is used. The 1 st laminated glass member and the 2 nd laminated glass member are glass plates or PET films, respectively, and the laminated glass preferably includes glass plates as at least one of the 1 st laminated glass member and the 2 nd laminated glass member. It is particularly preferable that both of the 1 st and 2 nd laminated glass members are glass plates.

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

The preparation is as follows.

< Tray base >

Tray base (1) tray base (tray base having a shape similar to that of FIG. 5) having tray base main body (made of iron), holding member (outer diameter 14.75cm and height 4.6 cm) and cushioning material (foamed polypropylene sheet having a thickness of 15mm, made "PAULOWNIA" by Mitsui chemical TOHCELLO Co., ltd.)

Tray base (2) tray base (tray base having a shape similar to that of FIG. 5) having tray base main body (made of iron), holding member (outer diameter 14.75cm and height 3.0 cm) and cushioning material (foamed polypropylene sheet having a thickness of 15mm, made "PAULOWNIA" by Mitsui chemical TOHCELLO Co., ltd.)

Tray base (3) tray base (tray base having a shape similar to that of FIG. 5) having tray base main body (made of iron), holding member (outer diameter 13.86cm and height 4.6 cm) and cushioning material (foamed polypropylene sheet having a thickness of 15mm, made "PAULOWNIA" by Mitsui chemical TOHCELLO Co., ltd.)

Tray base (4) tray base (tray base having a shape similar to that of FIG. 5) having tray base main body (made of polypropylene), holding member (outer diameter 14.75cm and height 4.6 cm) and cushioning material (foamed polypropylene sheet having a thickness of 15mm, made "PAULOWNIA" by Mitsui chemical TOHCELLO Co., ltd.)

Tray base (5) tray base having tray base body (made of iron), holding member (outer diameter 14.75cm and height 4.6 cm) (tray base having shape similar to FIG. 2)

Tray base (6) tray base (tray base having a shape similar to that of FIG. 5) having tray base main body (made of iron), holding member (outer diameter 14.75cm and height 4.6 cm) and cushioning material (foamed polypropylene sheet having a thickness of 10mm, made "PAULOWNIA" by Mitsui chemical TOHCELLO Co., ltd.)

Tray base (7) tray base (tray base having shape similar to FIG. 5) having tray base main body (made of iron), holding member (outer diameter 14.75cm and height 4.6 cm) and cushioning material (cardboard having thickness 10 mm)

Tray base (X1) tray base (tray base having shape similar to FIG. 2) having tray base main body (made of iron), holding member (outer diameter 11.55cm and height 4.6 cm)

Tray base (X2) tray base (tray base having shape similar to FIG. 2) having tray base main body (made of iron), holding member (outer diameter 14.75cm and height 1.0 cm)

Tray base (X3) tray base having tray base body (made of iron) and cushioning material (foamed polypropylene sheet having a thickness of 15mm, "PAULOWNIA" manufactured by Mitsui chemical TOHCELLO Co., ltd.)

The following winding cores were prepared.

< Winding core >

Winding core (Polypropylene, external diameter: 15.8cm, internal diameter of open end: 15.4 cm)

< Intermediate film >

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

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

[ Method (1) for producing intermediate film (1) ]

Preparation of the composition for forming layer 1:

the following ingredients were blended and thoroughly kneaded by a mixing roll to obtain a composition for forming layer 1.

100 Parts by weight of a polyvinyl acetal resin (average polymerization degree: 3000, hydroxyl group content: 22 mol%, acetylation degree: 13 mol%, acetalization degree: 65 mol%)

60 Parts by weight of triethylene glycol di-2-ethylhexanoate (3 GO)

Tinuvin326 (2- (2 '-hydroxy-3' -tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, manufactured by BASF corporation, "Tinuvin 326") was present in the obtained layer 1 in an amount of 0.2 wt%

BHT (2, 6-di-t-butyl-p-cresol) in an amount of 0.2 wt% in the obtained layer 1

Preparation of the composition for forming layers 2 and 3:

the following ingredients were blended and thoroughly kneaded by a mixing roll to obtain a composition for forming layers 2 and 3.

100 Parts by weight of a polyvinyl acetal resin (average polymerization degree 1700, hydroxyl group content: 30.5 mol%, acetylation degree: 1 mol%, acetalization degree: 68.5 mol%)

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

Tinuvin326 (2- (2 '-hydroxy-3' -tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, BASF corporation "Tinuvin 326") was present in an amount of 0.2 wt% in the obtained layers 2 and 3

BHT (2, 6-di-t-butyl-p-cresol) in an amount of 0.2 wt% in the obtained layers 2 and 3

The composition for forming layer 1 and the composition for forming layers 2 and 3 were co-extruded using an extruder to obtain a wedge-shaped intermediate film (1) having a laminated structure of layer 2/layer 1/layer 3. The resulting intermediate film (1) had 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 1m.

[ Method (2) for producing intermediate film (2) ]

Preparation of composition for forming intermediate film (layer 1):

The following components were blended and thoroughly kneaded by a mixing roll to obtain a composition for forming an intermediate film.

100 Parts by weight of a polyvinyl acetal resin (average polymerization degree 1700, hydroxyl group content: 30.5 mol%, acetylation degree: 1.0 mol%, acetalization degree: 68.5 mol%)

Triethylene glycol di-2-ethylhexanoate (3 GO) 40 parts by weight

Tinuvin326 (2- (2 '-hydroxy-3' -tert-butyl-5-methylphenyl) -5-chlorobenzotriazole, manufactured by BASF corporation, "Tinuvin 326") was present in the resulting interlayer film in an amount of 0.2% by weight

BHT (2, 6-di-t-butyl-p-cresol) in an amount of 0.2 wt% in the obtained intermediate film

Preparation of an intermediate film:

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

Example 1

(1) Preparation of a roll of intermediate film:

the obtained intermediate film (1) is wound around the outer circumferential surface of the winding core to form a roll, and a roll of the intermediate film is obtained.

(2) Preparation of a reel package:

A winding core of a winding body of an intermediate film wound around the winding core is arranged such that a holding member of a tray base (1) is positioned inside an opening end of the winding core. The support member is provided on the tray base (1), and then the top plate member is provided. Thus, a roll package was produced.

(Example 2 to 14 and comparative example 1 to 3)

A roll package was obtained in the same manner as in example 1, except that the structure of the roll package was changed as described in the following table.

(Evaluation)

(1) Determination of distance and angle

The following distances (dimensions) and angles were measured in the obtained roll package, and the following C was obtained.

A distance (cm) from position 2P 2 to the 1 st surface of the tray base

B distance (cm) from position 1P 1 to position 2P 2

D distance (cm) from position 1P 1 to the 1 st surface of the tray base

E distance (cm) from position 3P 3 to the 1 st surface of the tray base

Θ angle (°) formed by the straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface of the tray base

The 1 st position P1, the 2 nd position P2, and the 3 rd position P3 are the following positions.

1 St position P1. Position of the outer periphery of the roll with shortest distance from the outer periphery of the roll to the 1 st surface of the tray base

Position 2P 2 the position of the outer periphery of the winding core with the shortest distance from position 1 to the outer periphery of the winding core

3 Rd position P3. Position of the outer periphery of the roll having the longest distance from the outer periphery of the roll to the 1 st surface of the tray base

Based on the measurement result, a value of C represented by the following formula (C) is calculated. When the value of C is 0, this means that the roll body is in contact with the tray base.

[ Math 5]

(2) Stability of roll package

The obtained roll package is transported by an elevator. The stability of the roll package was evaluated based on the following criteria. The angle θ in the following evaluation criterion is an angle formed between a straight line connecting the 1 st position P1 and the 2 nd position P2 and the 1 st surface of the tray base.

< Evaluation criterion for stability of roll Package >

O is that the angle theta after being carried by the lifter is less than 10 DEG

Delta is that the angle theta after being transported by the lifter is more than 10 DEG and less than 20 DEG

X the angle theta after being carried by the lifter is more than 20 DEG

(3) Wrinkles of intermediate film

By visually observing the intermediate film in the roll package, it was confirmed that wrinkles were generated in the intermediate film. Further, the roll core and the roll body of the intermediate film are taken out from the roll package, and the intermediate film is unwound from the roll core. It was confirmed whether or not the intermediate film unwound from the winding core was good. The wrinkles of the intermediate film were evaluated based on the following criteria.

< Evaluation criterion of wrinkles of intermediate film >

No wrinkles were confirmed on the intermediate film, and the intermediate film was well unwound from the winding core

Delta. Although a few wrinkles were confirmed in the intermediate film, the intermediate film could be unwound well from the winding core

The intermediate film was confirmed to have significant wrinkles, and the intermediate film could not be unwound from the winding core satisfactorily

(4) Optical strain of laminated glass

Laminated glass was produced using an intermediate film "unwound" by folding the "(3) intermediate film. Specifically, a laminated glass was produced by the following steps.

Preparation of laminated glass:

the obtained interlayer film was sandwiched between 2 sheets of transparent glass (300 mm in the longitudinal direction. Times.300 mm in the transverse direction) having a thickness of 2.5mm in accordance with JIS R3202:1996, to obtain a laminate. The laminate thus obtained was placed in a rubber bag, deaerated for 20 minutes under a vacuum of 2.6kPa, then transferred into an oven in a deaerated state, further vacuum-pressed at 90 ℃ for 30 minutes, and pre-pressed. The laminate subjected to the pre-press was press-fitted in an autoclave at 135℃and a pressure of 1.2MPa for 20 minutes to obtain a laminated glass.

Measurement of optical strain:

The resulting laminated glass was placed under a fluorescent lamp, and strain was visually confirmed. The laminated glass was disposed at a position separated from the strong light source projector 3m and at a position where the angle formed between 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 disposed 1.5m behind the laminated glass. Light is irradiated from a strong light source projector, and strain of a projection image projected on a projection screen is visually observed.

The optical strain of the laminated glass was evaluated based on the following criteria.

< Evaluation criterion of optical Strain of laminated glass >

No strain was confirmed in both the strong light source and the fluorescent lamp

Delta. A little optical strain was confirmed under strong light source but no strain was confirmed under fluorescent lamp X in both strong light source and fluorescent lamp

The composition and results are shown in tables 1 to 4 below.

TABLE 1

TABLE 2

TABLE 3

TABLE 4

Description of symbols

1. Tray base

1A, 1aa. 1 st surface

1B, 1 ab..2 nd surface

2. Core is rolled up

Roll (middle film roll)

Protective cover for protecting roll body

Roof part

Support part

Tray base body

Holding part

Opening

Cushioning material

51. Roof component body

Holding part

90. 90A, 90B

Claims (14)

1. A roll package is provided with:

A tray base with a1 st surface,

Winding core

A roll of an intermediate film for laminated glass, which is wound in a roll shape on the outer circumferential surface of the winding core,

The tray base has a tray base body and a holding member for holding the winding cores,

The holding member of the tray base has a portion protruding upward on the 1 st surface side of the tray base,

The winding cores are held by the holding members of the tray base,

The roll package comprises the following structure (1) or the following structure (2):

In the structure (1), when the position of the outer periphery of the roll body from the outer periphery of the roll body to the 1 st surface of the tray base is set to be the 1 st position, the position of the outer periphery of the roll core from the 1 st position to the outer periphery of the roll core from the shortest distance is set to be the 2 nd position, the distance from the 2 nd position to the 1 st surface of the tray base is set to be A, the distance from the 1 st position to the 2 nd position is set to be B, and an angle formed by a straight line connecting the 1 st position and the 2 nd position and the 1 st surface of the tray base is set to be θ, C represented by the following formula (C) exceeds 0,

[ Mathematics 1]

The tray base is provided with the tray base main body, the holding member and the buffer material, wherein the upper surface of the buffer material is the 1 st surface of the tray base, and the upper surface of the buffer material is in contact with the coil body.

2. The roll package according to claim 1, which is provided with the constitution (1).

3. The roll package of claim 2, wherein,

The θ exceeds 0 ° and is 14.8 ° or less.

4. A roll package according to claim 2 or 3, wherein,

The A exceeds 0cm and is less than 3 cm.

5. The roll package according to any one of claim 2 to 4, wherein,

The ratio of the absolute value of the difference between the outer diameter of the holding member and the inner diameter of the open end of the winding core to the outer diameter of the holding member is 0% or more and 20% or less,

The height of the holding member is 3cm or more and 10cm or less.

6. The roll package according to any one of claims 2 to 5, wherein,

The distance B is 11.32cm or more and 28.57cm or less.

7. The roll package according to any one of claims 2 to 6, wherein,

The position of the outer periphery of the roll body from the outer periphery of the roll body to the 1 st surface of the tray base, where the distance from the 1 st position to the 1 st surface of the tray base is set to be the 3 rd position, the distance from the 1 st position to the 1 st surface of the tray base is set to be D, and the distance from the 3 rd position to the 1 st surface of the tray base is set to be E, wherein the absolute value of the difference between D and E is 9.8cm or less.

8. The roll package according to any one of claims 2 to 7, wherein,

The tray base has the tray base body, the holding member and a cushioning material,

The upper surface of the buffer material is the 1 st surface of the tray base.

9. The roll package of claim 8, wherein,

The buffer material is a polypropylene sheet, a foaming polypropylene sheet, a polycarbonate sheet, a plastic hollow plate, an environment-friendly plastic sheet or a paperboard.

10. The roll package according to claim 1, which is provided with the constitution (2).

11. The roll package of claim 10, wherein,

The buffer material is a polypropylene sheet, a foaming polypropylene sheet, a polycarbonate sheet, a plastic hollow plate, an environment-friendly plastic sheet or a paperboard.

12. The roll package according to any one of claims 1 to 11, wherein,

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

13. The roll package according to any one of claims 1 to 12, wherein,

The tray base body comprises iron, resin, stainless steel, aluminum, wood, or cardboard.

14. The roll package according to any one of claims 1 to 13, wherein,

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