EP4596439A1

EP4596439A1 - Roll package

Info

Publication number: EP4596439A1
Application number: EP23871803.5A
Authority: EP
Inventors: Megumi NAGAHARA; Yuu Sakamoto; Ryuta Tsunoda
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2022-09-29
Filing date: 2023-09-07
Publication date: 2025-08-06
Also published as: WO2024070564A1; JPWO2024070564A1; TW202430439A; CN119137051A; MX2025000879A; KR20250078804A

Abstract

Provided is a roll package capable of suppressing generation of a crease in an interlayer film. A roll package according to the present invention includes a pallet base having a first surface, a winding core, and a roll body of interlayer film for laminated glass, wound into a roll shape on an outer peripheral face of the winding core, the pallet base has a pallet base body, and a holding member for holding the winding core, the holding member of the pallet base has a portion that protrudes upside on the first surface side of the pallet base, the winding core is held by the holding member of the pallet base, and the roll package has a specific configuration (1) or a specific configuration (2).

Description

TECHNICAL FIELD

The present invention relates to a roll package including a pallet base, a winding core, and a roll body of an interlayer film for laminated glass.

BACKGROUND ART

Laminated glass in which an interlayer film for laminated glass (hereinafter sometimes abbreviated as interlayer film) is sandwiched between a pair of glass plates is known. The laminated glass is widely used for automobiles, railway vehicles, aircraft, ships, buildings and the like.
Following production, the interlayer film is wound around a winding core and made into a roll body (for example, Patent Document 1). Also, the roll body is stored in a state of a roll package packaged with a predetermined member until use.

Related Art Document

Patent Document

Patent Document 1: JP 2022-015080 A

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

It is conceivable to vertically place a roll body of interlayer film wound around a winding core, on a pallet base to obtain a roll package. The procedure of vertically placing the roll body of interlayer film on the pallet base is, for example, as follows. (1) Prepare a pallet base having a holding member for holding a winding core. (2) Prepare a roll body of interlayer film wound around a winding core, and vertically place the winding core around which the interlayer film is wound on the pallet base in such a manner that the holding member is located inside an open end of the winding core. From the viewpoint of facilitating the operation of vertically placing the winding core on the pallet 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 peripheral face in the open end of the winding core and the outer peripheral face of the holding member.
Therefore, the roll body of interlayer film is not stationarily placed completely perpendicularly to the top face of the pallet base (the state that the angle formed by the axial direction of the winding core and the top face of the pallet base is 90°), but is in an inclined state and the pallet base and the roll body of interlayer film come into contact with each other. Contact between the pallet base and the roll body of interlayer film may cause a crease in the interlayer film.
If an interlayer film in which a crease is generated is used to produce laminated glass, foaming occurs, and optical strain occurs in the laminated glass.
It is an object of the present invention to provide a roll package capable of suppressing generation of a crease in an interlayer film.

MEANS FOR SOLVING THE PROBLEMS

In the present specification, the following roll package is disclosed.
Item 1. A roll package including a pallet base having a first surface, a winding core, and a roll body of interlayer film for laminated glass, wound into a roll shape on an outer peripheral face of the winding core, the pallet base having a pallet base body, and a holding member for holding the winding core, the holding member of the pallet base having a portion that protrudes upside on the first surface side of the pallet base, the winding core being held by the holding member of the pallet base, the roll package having a configuration (1) or a configuration (2) below:
Configuration (1): when a position of an outer periphery of the roll body where a distance from the outer periphery of the roll body to the first surface of the pallet base is shortest is defined as a first position, a position of an outer periphery of the winding core where a distance from the first position to the outer periphery of the winding core is shortest is defined as a second position, a distance from the second position to the first surface of the pallet base is defined as A, a distance from the first position to the second position is defined as B, and an angle formed by a straight line connecting the first position and the second position, and the first surface of the pallet base is defined as θ, C represented by a formula (C) below is more than 0;
[Numerical formula 1] $C = \frac{A}{sinθ} - B$
Configuration (2): The pallet base has the pallet base body, the holding member, and a cushioning material, a top face of the cushioning material is the first surface of the pallet base, and the top face of the cushioning material and the roll body are in contact with each other.
Item 2. The roll package according to item 1, having the configuration (1).
Item 3. The roll package according to item 2, wherein the θ is more than 0° and 14.8° or less.
Item 4. The roll package according to item 2 or 3, wherein the A is more than 0 cm and 3 cm or less.
Item 5. The roll package according to any one of items 2 to 4, wherein a ratio of an absolute value of difference between an outer diameter of the holding member and an inner diameter of an open end of the winding core, to the outer diameter of the holding member is 0% or more and 20% or less, and a height of the holding member is 3 cm or more and 10 cm or less.
Item 6. The roll package according to any one of items 2 to 5, wherein the B is 11.32 cm or more and 28.57 cm or less.
Item 7. The roll package according to any one of items 2 to 6, wherein a position of an outer periphery of the roll body where a distance from the outer periphery of the roll body to the first surface of the pallet base is longest is defined as a third position, a distance from the first position to the first surface of the pallet base is defined as D, and a distance from the third position to the first surface of the pallet base is defined as E, an absolute value of difference between the D and the E is 9.8 cm or less.
Item 8. The roll package according to any one of items 2 to 7, wherein the pallet base has the pallet base body, the holding member, and a cushioning material, and a top face of the cushioning material is the first surface of the pallet base.
Item 9. The roll package according to item 8, wherein the cushioning material is a polypropylene sheet, a foam polypropylene sheet, a polycarbonate sheet, plastic cardboard, an eco-friendly plastic sheet, or a carton sheet.
Item 10. The roll package according to item 1, having the configuration (2).
Item 11. The roll package according to item 10, wherein the cushioning material is a polypropylene sheet, a foam polypropylene sheet, a polycarbonate sheet, plastic cardboard, an eco-friendly plastic sheet, or a carton sheet.
Item 12. The roll package according to any one of items 1 to 11, wherein the interlayer film for laminated glass has a thickness that is nonuniform in a width direction of the interlayer film for laminated glass.
Item 13. The roll package according to any one of items 1 to 12, wherein the pallet base body contains iron, resin, stainless, aluminum, wood or carton.
Item 14. The roll package according to any one of items 1 to 13, wherein the winding core contains polypropylene, polyethylene, polyvinyl chloride, paper, glass, fabric, wood or fiber-reinforced plastic.

EFFECT OF THE INVENTION

According to the present invention, it is possible to provide a roll package capable of suppressing generation of a crease in an interlayer film.

BRIEF DESCRIPTION OF DRAWINGS

[Fig. 1] Fig. 1 is a front view showing a roll package according to a first embodiment of the present invention.
[Fig. 2] Figs. 2(a) and (b) are respectively a plan view and a sectional view showing the first example of the pallet base that can be used in the present invention.
[Fig. 3] Fig. 3 is a view for illustrating a specific distance or a specific angle in the roll package according to the first embodiment of the present invention.
[Fig. 4] Fig. 4 is a front view showing a roll package according to a second embodiment of the present invention.
[Fig. 5] Figs. 5(a) and (b) are respectively a plan view and a sectional view showing the second example of the pallet base that can be used in the present invention.
[Fig. 6] Fig. 6 is a view for illustrating a specific distance or a specific angle in the roll package according to the second embodiment of the present invention.
[Fig. 7] Fig. 7 is a front view showing a roll package according to the third embodiment of the present invention.

MODES FOR CARRYING OUT THE INVENTION

The roll package according to the present invention includes a pallet base having a first surface, a winding core, and a roll body of interlayer film for laminated glass, wound into a roll shape around an outer peripheral face of the winding core. In the roll package according to the present invention, the pallet base has a pallet base body, and a holding member for holding a winding core, and the holding member of the pallet base has a portion protruding upside on the first surface side of the pallet base. In the roll package according to the present invention, the winding core is held by the holding member of the pallet base.
The roll package according to the present invention has the following configuration (1) or the following configuration (2). The roll package according to the present invention may have the following configuration (1), and may include the following configuration (2).
Configuration (1): The position in 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 defined as a first position, and the position in the outer periphery of the winding core where the distance from the first position to the outer periphery of the winding core is shortest is defined as a second position. The distance from the second position to the first surface of the pallet base is defined as A, the distance from the first position to the second position is defined 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 defined as θ. At this time, C represented by the following formula (C) is more than 0.
[Numerical formula 2] $C = \frac{A}{sinθ} - B$
Configuration (2): The pallet base has the pallet base body, the holding member, and a cushioning material, the top face of the cushioning material is the first surface of the pallet base, and the top face of the cushioning material and the roll body are in contact with each other.
In the roll package according to the present invention, since the above configuration is provided, it is possible to suppress generation of a crease in the interlayer film.
Therefore, when laminated glass is prepared with the interlayer film unwound from the roll package according to the present invention, it is possible to make foaming less likely to occur, and make optical strain less likely to occur in the laminated glass.
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. It is to be noted that the following embodiments are merely illustrative, and the present invention is not limited to the following embodiments. Also, in each drawing, the member having substantially the same function is sometimes referred to by the same symbol.
Hereinafter, the roll package according to the present invention is described by referring to Figs. 1 to 7.

(First embodiment: roll package having configuration (1))

Fig. 1 is a front view showing a roll package according to the first embodiment of the present invention. Fig. 1 is a front view showing a roll package having the configuration (1).
A roll package 90 shown in Fig. 1 includes a pallet base 1, a winding core 2, a roll body 3 of interlayer film, a roll body protecting cover 4, a top plate member 5, and a support member 6. For the sake of illustration, in Fig. 1, the roll body protecting cover 4 is indicated by a broken like, and members such as the roll body 3 arranged inside the roll body protecting cover 4 are also illustrated. Also, for the sake of illustration, in Fig. 1, a holding member 12 of the pallet base 1 and a holding member 52 of the top plate member 5 existing inside open ends of the winding core 2 are indicted by broken lines.
The pallet base 1 has a pallet base body 11, and the holding member 12 for holding a winding core. Also, 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 opposed to each other in the pallet base 1. The holding member 12 has a portion that protrudes upside on the first surface 1a side.
The winding core 2 has openings in both end parts. The winding core 2 has an open end.
The winding core 2 is arranged such that the holding member 12 is located 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 interlayer film is wound into a roll shape on the outer peripheral face of the winding core 2 to give a roll body 3 of interlayer film. The interlayer film is wound into a roll shape on the outer peripheral face excluding both end parts of the winding core 2. Therefore, the roll body 3 is vertically placed on the pallet base 1.
In the roll package 90, the first surface 1a of the pallet base 1 and the roll body 3 are not in contact with each other.
The roll body protecting 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 protecting cover 4.
The top plate member 5 is a member that covers the top of the roll body 3.
The support member 6 is a member that supports the pallet base 1 and the top plate member 5.
First, also with reference to Fig. 2, the pallet base 1 is described. Figs. 2(a) and (b) are respectively a plan view and a sectional view showing the first example of the pallet base that can be used in the present invention. Fig. 2(b) is a sectional view along the line I-I in Fig. 2(a).
The pallet base 1 has the pallet base body 11, and the holding member 12. Also, 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 opposed to each other in the pallet base 1. The first surface 1a is the upper principal plane of the pallet base 1. The second surface 1b is the lower principal plane of the pallet base 1. The second surface 1b of the pallet base 1 is a plane that comes into contact with a placement plane such as the ground.
In the pallet base 1, the top face of the pallet base body 11 is the first surface 1a of the pallet base 1. In the pallet base 1, the bottom face of the pallet base body 11 is the second surface 1b of the pallet base 1. The pallet base body 11 sometimes has a gap for reduction of weight. Therefore, there is sometimes a gap in the top face of pallet base body 11. When there is a gap in the top face, the top face of the pallet base body 11 means the top face assuming that the top face of the pallet base body 11 does not have a gap. When there is a gap in the top face of the pallet base body 11, the first surface 1a of the pallet base 1 means the top face of the pallet base body 11 assuming that the top face of the pallet base body 11 does not have a gap.
The size, the shape and the material of the pallet base body 11 are not particularly limited as long as the winding core and the roll body of interlayer film can be placed thereon. As the pallet base body 11, a conventionally known member that is known as a pallet can be used. The pallet base body 11 may be an assembly assembled from a plurality of frames.
The material of the pallet base body 11 is not particularly limited. The pallet base body 11 may be made of metal, may be made of resin, may be made of fiber-reinforced plastic, may be made of wood, and may be made of paper. The pallet base body 11 made of resin may be made of foam resin.
The pallet base body 11 contains, for example, iron, resin, stainless, aluminum, wood or carton. The iron may be plated iron. Examples of the resin include polypropylene and the like.
The holding member 12 is attached to the pallet base body 11. The holding member 12 may be detachable or may be undetachable from the pallet base body 11. The holding member 12 and the pallet base body 11 may be separable or inseparable from each other.
The holding member 12 has a portion that protrudes upside on the first surface 1a side of the pallet base 1. The top face of the holding member 12 is located on the upper side than the first surface 1a of the part excluding the holding member 12 of the pallet base 1. The holding member 12 has an opening 12a. By the holding member 12 having the opening 12a, it is possible to reduce the weight of the pallet base 1 compared with the case of lacking the opening 12a. In preparing the roll package 90, the inside of the open end of the winding core 2 is arranged outside the holding member 12 (outside the opening 12a of the holding member 12). In the roll package 90, the inside of the lower open end of the winding core 2 is arranged outside the holding member 12 (outside the opening 12a of the holding member 12). When the pallet base 1 is planarly viewed, the profile of the holding member 12 is circular. However, when the pallet base 1 is planarly viewed, the profile of the holding member 12 may have other shape than a circle. The shape of the holding member 12 is not particularly limited as long as the winding core 2 can be held.
The outer diameter of the holding member 12 is smaller than the inner diameter of the open end of the winding core 2. A ratio of an absolute value of 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 is preferably 20% or less, more preferably 15% or less. The ratio is represented by the formula: [(absolute value of difference between outer diameter of holding member 12 and inner diameter of open end of winding core 2)/outer diameter of the holding member 12] × 100. When the ratio is the above lower limit or more, it becomes easy to arrange the holding member 12 inside the open end of the winding core 2 in preparation of the roll package 90, so that it is possible to facilitate the operation of vertically placing the winding core 2 on the pallet base. When the ratio is the above upper limit or less, the inclination of the roll body 3 of interlayer film can be effectively suppressed, and it is possible to exert the effect of the present invention more effectively.
The height of the holding member 12 is preferably 3 cm or more, more preferably 4 cm or more, and is preferably 10 cm or less, more preferably 9 cm or less. When the height of the holding member 12 is the above lower limit or more and the above upper limit or less, it is possible to suppress the inclination of the roll body 3 of interlayer film more effectively, and it is possible to exert the effect of the present invention more effectively. The height of the holding member 12 is the distance from the top face of the pallet base body 11 to the top face 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, may be made of resin, may be made of fiber-reinforced plastic, may be made of wood, and may be made of paper. The holding member 12 made of resin may be made of foam resin.
The material of the pallet base body 11, and the material of the holding member 12 may be the same or different from each other.
The pallet base 1 has two holding members 12. The pallet base 1 may have only one holding member 12, may have two holding members 12, and may have two or more holding members 12.
At four corners of the first surface 1a of the pallet base 1, a member extending upward from the first surface 1a, and for holding the support member 6 may be arranged.
Next, also with reference to Fig. 3, the configuration (1) in the roll package 90 is described.
In Fig. 3, the pallet base 1, the winding core 2, and the roll body 3 which are members necessary for describing the configuration (1) of the roll package 90 are illustrated. For the sake of illustration, the holding member 12 arranged inside the open end of the winding core 2 is indicated by a broken line.
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 shortest is defined as a first position P1. The position of the outer periphery of the winding core 2 where the distance from the first position P1 to the outer periphery of the winding core 2 is shortest is defined as a 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 longest is defined as a third position P3. The position of the intersection between the straight line connecting the first position P1 and the second position P2, and the first surface 1a of the pallet base 1 is defined as a fourth position P4.
The distance from the second position P2 to the first surface 1a of the pallet base 1 is defined as A (cm). The distance from the first position P1 to the second position P2 is defined as B (cm). The distance from the first position P1 to the first surface 1a of the pallet base 1 is defined as D (cm). The distance from the third position P3 to the first surface 1a of the pallet base 1 is defined as E (cm).
The angle formed by the straight line connecting the first position P1 and the second position P2, and the first surface 1a of the pallet base 1 is defined as θ.
In the roll package 90 having the configuration (1), C represented by the following formula (C) is more than 0. Therefore, in the roll package 90, it is possible to suppress generation of a crease in an interlayer film.
[Numerical formula 3] $C = \frac{A}{sinθ} - B$
The above C is normally the distance from the first position P1 to the fourth position P4, and is the distance (cm) indicated by C in Fig. 3.
In the roll package 90 having the configuration (1), C represented by the formula (C) is more than 0 cm, and preferably 0.5 cm or more. When the distance C represented by the formula (C) is the above lower limit or more, it is possible to exert the effect of the present invention more effectively. The C represented by the formula (C) may be 160 cm or less, may be 100 cm or less, may be 75 cm or less, may be 70 cm or less, may be 60 cm or less, may be 55 cm or less, may be 30 cm or less, may be 20 cm or less, may be 10 cm or less, and may be 5 cm or less.
The roll body 3 is not stationarily placed completely perpendicularly to the first surface 1a of the pallet base 1 (the state that the angle formed by the axial direction of the winding core 2 and the first surface 1a of the pallet base 1 is 90°). The roll body 3 is stationarily placed in an inclined state (the state that the angle formed by the axial direction of the winding core 2 and the first surface 1a of the pallet base 1 is less than 90°). The roll body 3 is stationarily placed such that the C represented by the formula (C) is more than 0.
The A is the distance from the second position P2 to the first surface 1a of the pallet base 1. The A is preferably more than 0 cm, more preferably 0.5 cm or more, and is preferably 3 cm or less, more preferably 2.5 cm or less. When the A is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively.
The B is the distance from the first position P1 to the second position P2. The B is preferably 11.32 cm or more, more preferably 15.00 cm or more, and is preferably 28.60 cm or less, more preferably 28.57 cm or less, further preferably 25.00 cm or less. When the B is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively. As the B increases, a crease is more likely to be generated in the roll body of interlayer film, however, in the present invention, it is possible to effectively suppress generation of a crease in the roll body of interlayer film even when the B is relatively large.
The D is the distance from the first position P1 to the first surface 1a of the pallet base 1. In the roll package 90 having the configuration (1), the D is more than 0 cm. The D is preferably 0.5 cm or more, more preferably 1.0 cm or more, and is preferably 9.8 cm or less, more preferably 9.0 cm or less. When the D is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively.
The E is the distance from the third position P3 to the first surface 1a of the pallet base 1. In the roll package 90 having the configuration (1), the E is more than 0 cm. The E is preferably 0.5 cm or more, more preferably 1.0 cm or more, and is preferably 9.8 cm or less, more preferably 9.0 cm or less. When the E is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively.
Normally, the D is smaller than the E.
An absolute value of difference between the D and the E is preferably 0.5 cm or more, more preferably 1.3 cm or more, and is preferably 9.8 cm or less, more preferably 8.2 cm or less. When the absolute value of difference is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively.
The θ is an angle formed by the straight line connecting the first position P1 and the second position P2, and the first surface 1a of the pallet base 1. The θ is preferably more than 0°, more preferably 2° or more, and is preferably 14.8° or less, more preferably 12° or less. When the θ is the above lower limit or more and the above upper limit or less, it is possible to exert the effect of the present invention more effectively.
Next, the winding core 2 is described.
As the winding core 2, a conventionally known winding core can be used. The shape of the winding core 2 is a cylinder having openings in both end parts. The winding core 2 has an open end. The winding core 2 has openings in both end parts. It is to be noted that the shape of the winding core 2 is not particularly limited as long as the winding core 2 can be held by the holding member 12. The winding core 2 may have, for example, a cylindrical columnar shape, may have a cylindrical columnar shape having openings in both end parts, and may have a shape other than these shapes.
The material of the winding core 2 is not particularly limited. The winding core 2 may be made of metal, may be made of resin, may be made of fiber-reinforced plastic, may be made of wood, may be made of paper, and may be made of glass. The winding core 2 made of resin may be made of foam resin.
The winding core 2 contains, for example, polypropylene, polyethylene, polyvinyl chloride, paper, glass, fabric, wood or fiber-reinforced plastic. The wood may be bamboo.
Next, the roll body 3 and an interlayer film forming the roll body 3 are described.
As the interlayer film, a conventionally known interlayer film can be used. The interlayer film has a one-layer structure or a two or more-layer structure. The interlayer film may have a one-layer structure, may have a two-layer structure, and may have a two or more-layer structure. The interlayer film may have a three-layer structure, may have a three or more-layer structure, may have a four-layer structure, may have a four or more-layer structure, may have a five-layer structure, may have a five or more-layer structure. The interlayer film may have a ten or less-layer structure and may have a five or less-layer structure. The interlayer film may include only the first layer. The interlayer film may include, the first layer, and a second layer arranged on a first surface side of the first layer. The interlayer film may include the first layer, the second layer arranged on the first surface side of the first layer, and a third layer arranged on a second surface side which is an opposite side to the first surface of the first layer.
The interlayer film may contain a thermoplastic resin, and may contain a thermoplastic resin and a plasticizer. The interlayer film may include a layer containing a thermoplastic, and may include a layer containing a thermoplastic resin and a plasticizer. The first layer preferably contains a thermoplastic resin, and preferably contains a thermoplastic resin and a plasticizer. The second layer preferably contains a thermoplastic resin, and preferably contains a thermoplastic resin and a plasticizer. The third layer preferably contains a thermoplastic resin, and preferably contains 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, and the like. Thermoplastic resins other than these may be used. One kind of the thermoplastic resin may be used alone and two or more kinds thereof may be used in combination.
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 a monobasic organic acid ester and a polybasic organic acid ester, organic phosphate plasticizers and organic phosphite plasticizers, and the like. It is preferred that the plasticizer be an organic ester plasticizer. It is preferred that the plasticizer be a liquid plasticizer. One kind of the plasticizer may be used alone, and two or more kinds thereof may be used in combination.
The interlayer film may contain other ingredients such as a heat shielding substance, an ultraviolet absorber, an oxidation inhibitor, a coloring agent, a coupling agent, a dispersant, a surfactant, a fire retardant, an antistatic agent, an adhesion adjusting agent (alkali metal salt and alkali earth metal salt and so on), a moisture-proofing agent, a fluorescent brightener, and an infrared absorber, and the like. One kind of the other ingredients may be used alone, and two or more kinds thereof may be used in combination.
The interlayer film may have a uniform thickness or may have a nonuniform thickness in the width direction of the interlayer film. In an interlayer film having a nonuniform thickness in the width direction of the interlayer film, a crease is likely to be generated in a roll body of the interlayer film, however, in the present invention, generation of a crease in a roll body of interlayer film can be effectively suppressed even if the interlayer film has a nonuniform thickness.
The roll diameter of the roll body 3 may be constant or various along the axial direction of the winding core 2. In the roll body 3, the roll diameter in the end part on the pallet base 1 side, and the roll diameter in the end part on the top plate member 5 side may differ from each other. In the roll body 3, the roll diameter in the end part on the pallet base 1 side may be larger than or smaller than the roll diameter in the end part on the top plate member 5 side. When the interlayer film is an interlayer film having a nonuniform thickness in the axial direction of the interlayer film, the roll diameter of the roll body 3 normally differs in the end part of the pallet base 1 side and in the end part of the top plate member 5 side.
A 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.
The roll diameter of the roll body 3 means the outer diameter of the roll body 3.
Next, the roll body protecting cover 4 is described.
The roll body protecting cover 4 is a member that covers the outer surface of the roll body 3. The roll body protecting cover 4 is used for protecting the roll body 3 from dust or the like. As the roll body protecting cover 4, a conventionally known roll body protecting cover can be used.
It is preferred that the roll body protecting cover 4 cover the entire outer peripheral face of the roll body 3. The roll body protecting cover 4 and the outer peripheral face of the roll body 3 may be in contact with each other, and need not be in contact with each other.
The roll body protecting cover 4 may be made of resin, may be made of paper, may be made of aluminum, and may be made of a composite material of these.
It is to be noted that the roll body protecting cover 4 need not be used.
Next, the top plate member 5 is described.
The top plate member 5 has a top plate member body 51, and the holding member 52 for holding a winding core. As the top plate member 5, a conventionally known top plate member can be used.
The material of the top plate member body 51 is not particularly limited. The top plate member body 51 may be made of metal, may be made of resin, may be made of fiber-reinforced plastic, may be made of wood, and may be made of paper. The top plate member body 51 made of resin may be made of foam resin.
The holding member 52 is attached to the top plate member body 51. The holding member 52 may be detachable or may be undetachable from the top plate member body 51. The holding member 52 and the top plate member body 51 may be separable or inseparable from each other.
The holding member 52 has a portion that protrudes downside on the bottom face side of the top plate member body 51. The holding member 52 has an opening. By the holding member 52 having an opening, it is possible to reduce the weight of the top plate member 5 compared with the case of lacking the opening. In preparing the roll package 90, the inside of the open end of the winding core 2 is arranged outside the holding member 52 (outside the opening of the holding member 52). In the roll package 90, the inside of the upper open end of the winding core 2 is arranged outside the holding member 52 (outside the opening of the holding member 52). When the top plate member 5 is viewed from below, the profile of the holding member 52 is circular. However, when the top plate member 5 is viewed from below, the profile of the holding member 52 may have other shape than a circle. The shape of the holding member 52 is not particularly limited as long as 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. A ratio of an absolute value of 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 is preferably 20% or less, more preferably 15% or less. The ratio is represented by the formula: [(absolute value of difference between outer diameter of holding member 52 and inner diameter of open end of winding core 2)/outer diameter of the holding member 52] × 100. When the ratio is the above lower limit or more, it becomes easy to arrange the holding member 52 inside the open end of the winding core 2 in preparation of the roll package 90. When the ratio is the above upper limit or less, the inclination of the roll body 3 of interlayer film can be effectively suppressed, and it is possible to exert the effect of the present invention more effectively.
The material of the holding member 52 is not particularly limited. The holding member 52 may be made of metal, may be made of resin, may be made of fiber-reinforced plastic, may be made of wood, and may be made of paper. The holding member 52 made of resin may be made of foam resin.
The material of the top plate member body 51, and the material of the holding member 52 may be the same or different from each other.
The top plate member body 51 has two holding members 52. The top plate member body 51 may have only one holding member 52, may have two holding members 52, and may have two or more holding members 52.
Next, the support member 6 is described.
The support member 6 is, for example, a metal member. The support member 6 stands at four corners of the pallet base 1. By the support member 6, the pallet base 1 and the top plate member 5 are linked. From the viewpoint of supporting the pallet base 1 and the top plate member 5 stably, it is preferred that four or more support members 6 be used for one pallet base 1, and it is more preferred that eight or more support members 6 be used for one pallet base 1. As the support member 6, a conventionally known support member can be used.

(Second embodiment: roll package having configuration (1))

Fig. 4 is a front view showing a roll package according to the second embodiment of the present invention. Fig. 4 is a front view showing a roll package having the configuration (1).
A roll package 90A shown in Fig. 4 includes a pallet base 1A, the winding core 2, the roll body 3 of interlayer film, the roll body protecting cover 4, the top plate member 5, and the support member 6. The configuration of the pallet base differs between the roll package 90 shown in Fig. 1 and the roll package 90A shown in Fig. 4. For the sake of illustration, in Fig. 4, the roll body protecting cover 4 is indicated by a broken like, and members such as the roll body 3 arranged inside the roll body protecting cover 4 are also illustrated. Also, for the sake of illustration, in Fig. 4, the holding member 12 of the pallet base 1A and the holding member 52 of the top plate member 5 existing inside open ends of the winding core 2 are indicted by broken lines. In Fig. 4, unlike Fig. 1, the part of one roll body 3 of the part of two roll bodies 3 is illustrated.
The pallet base 1A has the pallet base body 11, and the holding member 12 for holding a winding core, and a cushioning material 13. Also, 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 opposed to each other in the pallet base 1A. The holding member 12 has a portion that protrudes upside on the first surface 1Aa side.
The winding core 2 has openings in both end parts. The winding core 2 has an open end.
The winding core 2 is arranged such that the holding member 12 is located 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 winding core 2 may exist on the upper side than the first surface 1Aa of the pallet base 1A. In the roll package 90A, the entire lower end of the winding core 2 may exist on the lower side than the first surface 1Aa of the pallet base 1A.
The interlayer film is wound into a roll shape on the outer peripheral face of the winding core 2 to give a roll body 3 of interlayer film. The interlayer film is wound into a roll shape on the outer peripheral face excluding both end parts of the winding core 2. Therefore, the roll body 3 is vertically placed on the pallet base 1A.
In the roll package 90A, the first surface 1Aa of the pallet base 1A and the roll body 3 are not in contact with each other.
Configurations such as preferred configurations of the winding core 2, the roll body 3, the roll body protecting cover 4, the top plate member 5 and the support member 6 in the roll package 90A are as described in the above "first embodiment", and hence the description is omitted.
Next, also with reference to Fig. 5, the pallet base 1A is described. Figs. 5(a) and (b) are respectively a plan view and a sectional view showing the second example of the pallet base that can be used in the present invention. Fig. 5(b) is a sectional view along the line I-I in Fig. 5(a).
The pallet base 1A has the first surface 1Aa. The pallet base 1A has the pallet base body 11, the holding member 12, and the cushioning material 13. The pallet base 1A has the first surface 1Aa and the second surface 1Ab. The first surface 1Aa and the second surface 1Ab are surfaces opposed to each other in the pallet base 1A. The second surface 1Ab of the pallet base 1A is a plane that comes into contact with a placement plane such as the ground. The first surface 1Aa is the upper principal plane of the pallet base 1A. The second surface 1Ab is the lower principal plane of the pallet base 1A.
Configurations such as preferred configurations of the pallet base body 11 and the holding member 12 in the pallet base 1A are as described in the above "first embodiment", and hence the description is omitted.
In the pallet base 1A, the cushioning material 13 is placed on the top face of the pallet base body 11. In the pallet base 1A, the top face of the cushioning material 13 is the first surface 1Aa of the pallet base 1A.
The material of the cushioning material 13 is not particularly limited as long as the cushioning material 13 functions as a cushioning material. It is preferred that the hardness of the cushioning material 13 be smaller than the hardness of the pallet base body 11. It is preferred that the cushioning material 13 have higher flexibility than the pallet base body 11. It is preferred that the cushioning material 13 have higher cushioning property than the pallet base body 11.
From the viewpoint of effectively suppression generation of a crease in the interlayer film at the time when the cushioning material 13 and the roll body 3 come into contact with each other, it is preferred that the cushioning material 13 be a polypropylene sheet, a foam polypropylene sheet, a polycarbonate sheet, plastic cardboard, an eco-friendly plastic sheet, or a carton sheet.
The thickness of the cushioning material 13 may be 1 mm or more, may be 5 mm or more, may be 15 mm or less, and may be 10 mm or less.
The pallet base 1A has one cushioning material 13. The pallet base 1A may have only one cushioning material 13, may have two cushioning materials 13, and may have two or more cushioning materials 13. In the pallet base 1A, two or more cushioning materials 13 may be layered and arranged on the top face of the pallet base body 11. In this case, each of two or more cushioning materials 13 may be the same or different from each other in thickness and in kind.
When the pallet base 1A has two or more cushioning materials 13, the total thickness of the cushioning material 13 may be 1 mm or more, may be 5 mm or more, may be 15 mm or less, and may be 10 mm or less.
Next, also with reference to Fig. 6, the configuration (1) in the roll package 90A is described.
In Fig. 6, the pallet base 1A, the winding core 2, and the roll body 3 which are members necessary for describing the configuration (1) of the roll package 90A are illustrated. For the sake of illustration, the holding member 12 arranged inside the open end of the winding core 2 is indicated by a broken line. For the sake of illustration, a lower end part of the winding core 2 that cannot be seen in front view of the roll package 90A (the lower end part of the winding core 2 arranged inside the cushioning material 13) is also indicated.
As described above, in the pallet base 1A, the top face of the cushioning material 13 is the first surface 1Aa of the pallet base 1A.
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 shortest is defined as a first position P1. The position of the outer periphery of the winding core 2 where the distance from the first position P1 to the outer periphery of the winding core 2 is shortest is defined as a 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 longest is defined as a third position P3. The position of the intersection between the straight line connecting the first position P1 and the second position P2, and the first surface 1Aa of the pallet base 1A is defined as a fourth position P4.
The distance from the second position P2 to the first surface 1Aa of the pallet base 1A is defined as A (cm). The distance from the first position P1 to the second position P2 is defined as B (cm). The distance from the first position P1 to the first surface 1Aa of the pallet base 1A is defined as D (cm). The distance from the third position P3 to the first surface 1Aa of the pallet base 1A is defined as E (cm).
The angle formed by the straight line connecting the first position P1 and the second position P2, and the first surface 1Aa of the pallet base 1A is defined as θ.
In the roll package 90A having the configuration (1), C represented by the following formula (C) is more than 0. Therefore, in the roll package 90A, it is possible to suppress generation of a crease in an interlayer film.
[Numerical formula 4] $C = \frac{A}{sinθ} - B$
The above C is normally the distance from the first position P1 to the fourth position P4, and is the distance (cm) indicated by C in Fig. 6.
Configurations such as preferred configurations of the A, the B, the C, the D, the E, and the θ in the roll package 90A are as described in the above "first embodiment", and hence the description is omitted.

(Third embodiment: roll package having configuration (2))

Fig. 7 is a front view showing a roll package according to the third embodiment of the present invention. Fig. 7 is a front view showing a roll package having the configuration (2).
A roll package 90B shown in Fig. 7 includes the pallet base 1A, the winding core 2, the roll body 3 of interlayer film, the roll body protecting cover 4, the top plate member 5, and the support member 6. For the sake of illustration, in Fig. 7, the roll body protecting cover 4 is indicated by a broken like, and members such as the roll body 3 arranged inside the roll body protecting cover 4 are also illustrated. Also, for the sake of illustration, in Fig. 7, a holding member 12 of the pallet base 1A and a holding member 52 of the top plate member 5 existing inside open ends of the winding core 2 are indicted by broken lines. In Fig. 7, unlike Fig. 1, the part of one roll body 3 of the part of two roll bodies 3 is illustrated.
The pallet base 1A has the pallet base body 11, and the holding member 12 for holding a winding core, and a cushioning material 13. Also, 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 opposed to each other in the pallet base 1A. The holding member 12 has a portion that protrudes upside on the first surface 1Aa side. In the pallet base 1A, the cushioning material 13 is placed on the top face of the pallet base body 11. In the pallet base 1A, the top face of the cushioning material 13 is the first surface 1Aa of the pallet base 1A.
The winding core 2 has openings in both end parts. The winding core 2 has an open end.
The winding core 2 is arranged such that the holding member 12 is located 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 winding core 2 may exist on the upper side than the first surface 1Aa of the pallet base 1A. In the roll package 90B, the entire lower end of the winding core 2 may exist on the lower side than the first surface 1Aa of the pallet base 1A.
The interlayer film is wound into a roll shape on the outer peripheral face of the winding core 2 to give a roll body 3 of interlayer film. The interlayer film is wound into a roll shape on the outer peripheral face excluding both end parts of the winding core 2. Therefore, the roll body 3 is vertically placed on the pallet base 1A.
In the roll package 90B shown in Fig. 7, unlike the roll package 90A shown in Fig. 4, the first surface 1Aa of the pallet base 1A (the top face of the cushioning material 13) and the roll body 3 are in contact with each other.
In the roll package 90B having the configuration (2), since the cushioning material 13 is provided, it is possible to effectively suppress generation of a crease in the interlayer film even though the first surface 1Aa of the pallet base 1A (the top face of the cushioning material 13) and the roll body 3 are in contact with each other.
Configurations such as preferred configurations of the winding core 2, the roll body 3, the roll body protecting cover 4, the top plate member 5 and the support member 6 in the roll package 90B are as described in the above "first embodiment", and hence the description is omitted. Configurations such as preferred configurations of the pallet base 1A in the roll package 90B are as described in the above "second embodiment", and hence the description is omitted.

(Other details of roll package)

The roll package according to the present invention includes the pallet base, the winding core, and the roll body of interlayer film. The roll package according to the present invention has the configuration (1) or the configuration (2).
The roll package according to the present invention may include the protecting cover, and need not include the protecting cover. The roll package according to the present invention may include the top plate member, and need not include the top plate member. The roll package according to the present invention may include the support member, and need not include the support member.
The roll package according to the present invention may include other members than the above-described members (pallet base, winding core, roll body, roll body protecting cover, top plate member, support member). For example, the roll package according to the present invention may be wound with a sheet such that the sheet covers the winding core, the roll body and the support member. The roll package according to the present invention may be packaged with a sheet such that the sheet covers the winding core, the roll body and the support member.
Also, in the roll package according to the present invention having the configuration (1), the pallet base may be a pallet base having the pallet base body and the holding member, and may be a pallet base having the pallet base body, the holding member, and the cushioning material.
The interlayer film may be an extrusion molded product. It is preferred that the interlayer film have an MD direction and a TD direction. The MD direction is a flow direction of an interlayer film at the time of producing the interlayer film. The TD direction is a direction orthogonal to the flow direction of an interlayer film at the time of producing the interlayer film and a direction orthogonal to the thickness direction of the interlayer film. The interlayer film is normally wound into a roll shape on the outer peripheral face of the winding core along the MD direction.
The interlayer film for laminated glass is used for obtaining laminated glass (use of the interlayer film for laminated glass into laminated glass). The interlayer film for laminated glass is an interlayer film suited for obtaining laminated glass. The interlayer film for laminated glass is cut into a size of laminated glass before use. The roll body of interlayer film for laminated glass is used for obtaining laminated glass (use of the roll body of interlayer film for laminated glass into laminated glass) . The roll body of interlayer film for laminated glass is a roll body suited for obtaining laminated glass. The roll body of interlayer film for laminated glass is cut into a size of laminated glass before use. The laminated glass includes the first lamination glass member, the second lamination glass member, and the interlayer film. In the laminated glass, the above-mentioned interlayer film is arranged between the first lamination glass member and the second lamination glass member.
It is preferred that the first lamination glass member be the first glass plate. It is preferred that the second lamination glass member be the second glass plate.
Examples of the first and second lamination glass members include a glass plate, a PET (polyethylene terephthalate) film, and the like. As the laminated glass, laminated glass in which an interlayer film is sandwiched between a glass plate and a PET film or the like, as well as laminated glass in which an interlayer film is sandwiched between two glass plates, is included. The laminated glass is a laminate including a glass plate, and it is preferred that at least one glass plate be used. It is preferred that each of the first lamination glass member and the second lamination glass member be a glass plate or a PET film, and the laminated glass include a glass plate as at least one of the first lamination glass member and the second lamination glass member. It is especially preferred that both of the first and second lamination glass members be glass plates.
Hereinafter, the present invention is illustrated by giving concrete examples and comparative examples of the present invention. The present invention is not limited to the following examples.
The followings were prepared.

Pallet base (1): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of iron), a holding member (outer diameter of 14.75 cm and height of 4.6 cm), and a cushioning material (foam polypropylene sheet having a thickness of 15 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
Pallet base (2): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of iron), a holding member (outer diameter of 14.75 cm and height of 3.0 cm), and a cushioning material (foam polypropylene sheet having a thickness of 15 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
Pallet base (3): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of iron), a holding member (outer diameter of 13.86 cm and height of 4.6 cm), and a cushioning material (foam polypropylene sheet having a thickness of 15 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
Pallet base (4): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of polypropylene), a holding member (outer diameter of 14.75 cm and height of 4.6 cm), and a cushioning material (foam polypropylene sheet having a thickness of 15 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
Pallet base (5): Pallet base (pallet base having a shape similar to Fig. 2) having a pallet base body (made of iron) and a holding member (outer diameter of 14.75 cm and height of 4.6 cm).
Pallet base (6): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of iron), a holding member (outer diameter of 14.75 cm and height of 4.6 cm), and a cushioning material (foam polypropylene sheet having a thickness of 10 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
Pallet base (7): Pallet base (pallet base having a shape similar to Fig. 5) having a pallet base body (made of iron), a holding member (outer diameter of 14.75 cm and height of 4.6 cm), and a cushioning material (carton sheet having a thickness of 10 mm).
Pallet base (X1): Pallet base (pallet base having a shape similar to Fig. 2) having a pallet base body (made of iron) and a holding member (outer diameter of 11.55 cm and height of 4.6 cm).
Pallet base (X2): Pallet base (pallet base having a shape similar to Fig. 2) having a pallet base body (made of iron) and a holding member (outer diameter of 14.75 cm and height of 1.0 cm).
Pallet base (X3) : Pallet base having a pallet base body (made of iron) and a cushioning material (foam polypropylene sheet having a thickness of 15 mm, available from Mitsui Chemicals Tohcello, Inc., "PAULOWNIA").
The following winding core was prepared.

Winding core (made of polypropylene, outer diameter: 15.8 cm, inner diameter of open end: 15.4 cm)

Interlayer film (1) (Interlayer film prepared by the following production method (1))
Interlayer film (2) (Interlayer film prepared by the following production method (2))

[Production method (1) of interlayer film (1)]

Preparation of composition for forming first layer:

The following ingredients were mixed, and kneaded sufficiently with a mixing roll to obtain a composition for forming a first layer.
Polyvinyl acetal resin (average polymerization degree: 3000, content of hydroxyl group: 22% by mole, acetylation degree: 13% by mole, acetalization degree: 65% by mole): 100 parts by weight

Triethylene glycol di-2-ethylhexanoate (3GO): 60 parts by weight
An amount that is to be 0.2% by weight in the obtained first layer of Tinuvin 326 (2-(2'-hydroxy-3'-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" available from BASF Japan Ltd.)
An amount that is to be 0.2% by weight in the obtained first layer of BHT (2,6-di-t-butyl-p-cresol)

Preparation of composition for forming second layer and third layer:

The following ingredients were mixed, and kneaded sufficiently with a mixing roll to obtain a composition for forming a second layer and a third layer.
Polyvinyl acetal resin (average polymerization degree: 1700, content of hydroxyl group: 30.5% by mole, acetylation degree: 1% by mole, acetalization degree: 68.5% by mole): 100 parts by weight

Triethylene glycol di-2-ethylhexanoate (3GO): 38 parts by weight
An amount that is to be 0.2% by weight in the obtained second layer and third layer of Tinuvin 326 (2-(2'-hydroxy-3'-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" available from BASF Japan Ltd.)
An amount that is to be 0.2% by weight in the obtained second layer and third layer of BHT (2,6-di-t-butyl-p-cresol)

By coextruding the composition for forming a first layer and the composition for forming a second layer and a third layer using a coextruder, a wedge-like interlayer film (1) having a laminate structure of the second layer/the first layer/the third layer was obtained. The obtained interlayer film (1) has a minimum thickness (760 µm) at one end and has a maximum thickness (1260 µm) at the other end. A distance between one end and the other end of the interlayer film (1) was 1 m.

[Production method (2) of interlayer film (2)]

Preparation of composition for forming interlayer film (first layer):

The following ingredients were mixed, and kneaded sufficiently with a mixing roll to obtain a composition for forming an interlayer film.
Polyvinyl acetal resin (average polymerization degree: 1700, content of hydroxyl group: 30.5% by mole, acetylation degree: 1.0% by mole, acetalization degree: 68.5% by mole): 100 parts by weight

Triethylene glycol di-2-ethylhexanoate (3GO): 40 parts by weight
An amount that is to be 0.2 % by weight in the obtained interlayer film of Tinuvin 326 (2-(2'-hydroxy-3'-t-butyl-5-methylphenyl)-5-chlorobenzotriazole, "Tinuvin 326" available from BASF Japan Ltd.)
An amount that is to be 0.2% by weight in the obtained interlayer film of BHT (2,6-di-t-butyl-p-cresol)

Preparation of interlayer film:

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

(Example 1)

(1) Preparation of roll body of interlayer film:

The obtained interlayer film (1) was wound up into a roll shape on the outer peripheral face of the winding core to obtain a roll body of interlayer film.

(2) Preparation of roll package:

The winding core in the roll body of interlayer film wound around the winding core was arranged so that the holding member in the pallet base (1) is located inside the open end of the winding core. The support member was installed on the pallet base (1) and then the top plate member was installed. In this manner, a roll package was prepared.

(Examples 2 to 14 and Comparative Examples 1 to 3)

A roll package was obtained in the same manner as that in Example 1 except that the configuration of the roll package was changed to those shown in the following Tables.

(Evaluation)

(1) Measurement of distance and angle

In the obtained roll package, the following distance (dimension) and angle were measured, and the following C was determined.

A: distance (cm) from the second position P2 to the first surface of the pallet base
B: distance (cm) from the first position P1 to the second position P2
D: distance (cm) from the first position P1 to the first surface of the pallet base
E: distance (cm) from the third position P3 to the first surface of the pallet base
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

The first position P1, the second position P2 and the third position P3 are the following positions.
First position P1: 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
Second position P2: the position of the outer periphery of the winding core where the distance from the first position P1 to the outer periphery of the winding core is shortest
Third position P3: 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 longest
From the measurement results, the value of C represented by the following formula (C) was calculated. When the value of C is 0, it means that the roll body and the pallet base are in contact with each other.
[Numerical formula 5] $C = \frac{A}{sinθ} - B$

(2) Stability of roll package

The obtained roll package was conveyed by a lift. Stability of the roll package was evaluated according to the following criteria. The angle θ in the following evaluation criteria is an angle formed by the straight line connecting the first position P1 and the second position P2, and the first surface of the pallet base.

∘: angle θ after conveyance by the lift is less than 10°
△: angle θ after conveyance by the lift is 10° or more and less than 20°
×: angle θ after conveyance by the lift is 20° or more

(3)Crease in interlayer film

The interlayer film in the roll package was visually observed, and whether a crease is generated in the interlayer film was examined. Also, the winding core and the roll body of interlayer film were taken out from the roll package, and the interlayer film was unwound from the winding core. Unwinding property of unwinding of the interlayer film from the winding core was examined. A crease in the interlayer film was evaluated according to the following criteria.

∘: a crease is not observed in the interlayer film, and the interlayer film can be unwound well from the winding core
△: a crease is observed slightly in the interlayer film, but the interlayer film can be unwound well from the winding core
×: a crease is observed clearly in the interlayer film, and the interlayer film cannot be unwound well from the winding core

(4) Optical strain of laminated glass

Using the interlayer film unwound in the above "(3) Crease in interlayer film", laminated glass was prepared. Specifically, laminated glass was prepared in the following procedure.

Preparation of laminated glass:

The obtained interlayer film was sandwiched between two sheets of 2.5-mm thick clear glass (300 mm long × 300 mm wide) conforming to JIS R3202:1996 to obtain a laminate. The obtained laminate was put into a rubber bag and the inside thereof is degassed for 20 minutes with a degree of vacuum of 2.6 kPa, after which the laminate in the degassed condition was transferred into an oven, and vacuum-pressed by retention at 90°C for 30 minutes, and thus the laminate was preliminarily press-bonded. The preliminarily press-bonded laminate was subjected to press-bonding for 20 minutes under conditions of 135°C and a pressure of 1.2 MPa in an autoclave to obtain a laminated glass.

Measurement of optical strain:

The obtained laminated glass was held up under the fluorescent light, and strain was visually examined. The obtained laminated glass was arranged at a position of 3 m from a strong light source projector, which is also the position where the angle formed by the principal plane of the laminated glass and the light beam emitted from the strong light source projector is 20°. Also, at 1.5 m behind from the laminated glass, a projection screen was arranged. Light was emitted from the strong light source projector, and strain of the projection image projected on the projection screen was visually observed.
Optical strain of the laminated glass was evaluated according to the following criteria.

∘: Strain is not observed both under the strong light source and under the fluorescent light.
△: Optical strain is slightly observed under the strong light source, but strain is not observed under the fluorescent light.
×: Strain is observed both under the strong light source and under the fluorescent light.

Configurations and results are shown in the following Tables 1 to 4.

[Table 1]

				Example 1	Example 2	Example 3	Example 4
Pallet base	Kind			(1)	(2)	(3)	(4)
	Pallet base body	Material	-	Iron	Iron	Iron	PP
	Holding member	Height	cm	4.6	3.0	4.6	4. 6
	Holding member	Outer diameter	cm	14.75	14.75	13.86	14.75
	Cushioning material	Material	-	Foam PP	Foam PP	Foam PP	Foam PP
	Cushioning material	Thickness	mm	15	15	15	15
Winding core	Material		-	PP	PP	PP	PP
Roll body of interlayer film	Kind of interlayer film			(1)	(1)	(1)	(1)
	Thickness of interlayer film		-	Nonuniform	Nonuniform	Nonuniform	Nonuniform
	Distance (B) from first position P1 to second position P2		cm	11.35	11.35	11.35	11.35
	Minimum value of roll diameter of roll body (=(B × 2) + outer diameter of winding core)		cm	38.5	38.5	38.5	38.5
Distance (A) from second position P2 to first surface of pallet base			cm	3	3	3	3
Angle (θ) formed by straight line connecting first position P1 and second position P2, and first surface of pallet base			°	2	10	12	2
C = ((A/sinθ) - B))			cm	74.6	5.9	3.1	74.6
Sufficiency of configuration (1) or configuration (2)			-	Configuration (1)	Configuration (1)	Configuration (1)	Configuration (1)
Distance (E) from third position P3 to first surface of pallet base			cm	3.9	7.7	8.6	3.9
Distance (D) from first position P1 to first surface of pallet base			cm	2.6	1.0	0.6	2.6
Absolute value of difference between (D) and (E)			cm	1.3	6.7	8.0	1.3
Ratio of absolute value of difference between outer diameter of holding member and inner diameter of open end of winding core, to outer diameter of holding member			%	4.2	4.2	10.0	4.2
Evaluation	Stability of roll package			○	Δ	Δ	○
	Crease in interlayer film			○	○	○	○
	Optical strain of laminated glass			○	○	○	○

[Table 2]

				Example 5	Example 6	Example 7	Example 8
Pallet base	Kind			(1)	(1)	(1)	(5)
	Pallet base body	Material	-	Iron	Iron	Iron	Iron
	Holding member	Height	cm	4.6	4.6	4.6	4. 6
	Holding member	Outer diameter	cm	14.75	14.75	14.75	14.75
	Cushioning material	Material	-	Foam PP	Foam PP	Foam PP	-
	Cushioning material	Thickness	mm	15	15	15	-
Winding core	Material		-	PP	PP	PP	PP
Roll body of interlayer film	Kind of interlayer film			(2)	(1)	(1)	(1)
	Thickness of interlayer film		-	Uniform	Nonuniform	Nonuniform	Nonuniform
	Distance (B) from first position P1 to second position P2		cm	28.60	20.30	20.30	20.30
	Minimum value of roll diameter of roll body (=(B × 2) + outer diameter of winding core)		cm	73	56.4	56.4	56.4
Distance (A) from second position P2 to first surface of pallet base			cm	3	3	1	3
Angle (θ) formed by straight line connecting first position P1 and second position P2, and first surface of pallet base			○	2	2	2	2
C = ((A/sinθ) - B))			cm	57.4	65.7	8.4	65.7
Sufficiency of configuration (1) or configuration (2)				Configuration (1)	Configuration (1)	Configuration (1)	Configuration (1)
Distance (E) from third position P3 to first surface of pallet base			cm	4.5	4.3	2.3	4.3
Distance (D) from first position P1 to first surface of pallet base			cm	2.0	2.3	0.3	2.3
Absolute value of difference between (D) and (E)			cm	2.5	2.0	2.0	2.0
Ratio of absolute value of difference between outer diameter of holding member and inner diameter of open end of winding core, to outer diameter of holding member			%	4.2	4.2	4.2	4.2
Evaluation	Stability of roll package			○	○	○	○
	Crease in interlayer film			○	○	○	○
	Optical strain of laminated glass			○	○	○	○

[Table 3]

				Example 9	Example 10	Example 11	Example 12
Pallet base	Kind			(1)	(2)	(3)	(1)
	Pallet base body	Material	-	Iron	Iron	Iron	Iron
	Holding member	Height	cm	4.6	3.0	4.6	4. 6
	Holding member	Outer diameter	cm	14.75	14.75	13.86	14.75
	Cushioning material	Material	-	Foam PP	Foam PP	Foam PP	Foam PP
	Cushioning material	Thickness	mm	15	15	15	15
Winding core	Material		-	PP	PP	PP	PP
Roll body of interlayer film	Kind of interlayer film			(1)	(1)	(1)	(2)
	Thickness of interlayer film		-	Nonuniform	Nonuniform	Nonuniform	Uniform
	Distance (B) from first position P1 to second position P2		cm	20.30	20.30	20.30	28.60
	Minimum value of roll diameter of roll body (=(B × 2) + outer diameter of winding core)		cm	56.4	56.4	56.4	73
Distance (A) from second position P2 to first surface of pallet base			cm	3	3	3	3
Angle (θ) formed by straight line connecting first position P1 and second position P2, and first surface of pallet base			○	9	10	10	7
C = ((A/sinθ) - B))			cm	0	0	0	0
Sufficiency of configuration (1) or configuration (2)			-	Configuration (2)	Configuration (2)	Configuration (2)	Configuration (2)
Distance (E) from third position P3 to first surface of pallet base			cm	8.2	8.2	8.2	7.6
Distance (D) from first position P1 to first surface of pallet base			cm	0.0	0.0	0.0	0.0
Absolute value of difference between (D) and (E)			cm	8.2	8.2	8.2	7.6
Ratio of absolute value of difference between outer diameter of holding member and inner diameter of open end of winding core, to outer diameter of holding member			%	4.2	4.2	10.0	4.2
Evaluation	Stability of roll package			○	Δ	Δ	○
	Crease in interlayer film			Δ	Δ	Δ	Δ
	Optical strain of laminated glass			○	○	○	○

[Table 4]

				Example 13	Example 14	Comparative Example 1	Comparative Example 2	Comparative Example 3
Pallet base	Kind			(6)	(7)	(X1)	(X2)	(X3)
	Pallet base body	Material	-	Iron	Iron	Iron	Iron	Iron
	Holding member	Height	cm	4.6	4.6	4.6	1.0	-
	Holding member	Outer diameter	cm	14.75	14.75	11.55	14.75	-
	Cushioning material	Material	-	Foam PP	Carton	-	-	Foam PP
	Cushioning material	Thickness	mm	10	10	-	-	15
Winding core	Material		-	PP	PP	PP	PP	PP
Roll body of interlayer film	Kind of interlayer film			(1)	(1)	(1)	(1)	(2)
	Thickness of interlayer film		-	Nonuniform	Nonuniform	Nonuniform	Nonuniform	Uniform
	Distance (B) from first position P1 to second position P2		cm	28.60	28.60	20.30	11.35	28.60
	Minimum value of roll diameter of roll body (=(B × 2) + outer diameter of winding core)		cm	73	73	56.4	38.5	73
Distance (A) from second position P2 to first surface of pallet base			cm	3	3	3	3	3
Angle (θ) formed by straight line connecting first position P1 and second position P2, and first surface of pallet base			○	7	7	10	15	10
C = ((A/sinθ) - B))			cm	0	0	0	0	0
Sufficiency of configuration (1) or configuration (2)				Configuration (2)	Configuration (2)	-	-	-
Distance (E) from third position P3 to first surface of pallet base			cm	7.6	7.6	8.2	9.8	7.6
Distance (D) from first position P1 to first surface of pallet base			cm	0.0	0.0	0.0	0.0	0.0
Absolute value of difference between (D) and (E)			cm	7.6	7.6	8.2	9.8	7.6
Ratio of absolute value of difference between outer diameter of holding member and inner diameter of open end of winding core, to outer diameter of holding member			%	4.2	4.2	25.0	4.2	-
Evaluation	Stability of roll package			○	○	Δ	Δ	×
	Crease in interlayer film			Δ	Δ	×	×	×
	Optical strain of laminated glass			○	○	×	×	×

EXPLANATION OF SYMBOLS

1, 1A: Pallet base
1a, 1Aa: First surface
1b, 1Ab: Second surface
2: Winding core
3: Roll body (roll body of interlayer film)
4: Roll body protecting cover
5: Top plate member
6: Support member
11: Pallet base body
12: Holding member
12a: Opening
13: Cushioning material
51: Top plate member body
52: Holding member
90, 90A, 90B: Roll package

Claims

A roll package comprising:
a pallet base having a first surface;

a winding core; and

a roll body of interlayer film for a laminated glass, wound into a roll shape on an outer peripheral face of the winding core,

the pallet base having a pallet base body, and a holding member for holding the winding core,

the holding member of the pallet base having a portion that protrudes upside on the first surface side of the pallet base,

the winding core being held by the holding member of the pallet base,

the roll package having a configuration (1) or a configuration (2) below:
Configuration (1): when a position of an outer periphery of the roll body where a distance from the outer periphery of the roll body to the first surface of the pallet base is shortest is defined as a first position, a position of an outer periphery of the winding core where a distance from the first position to the outer periphery of the winding core is shortest is defined as a second position, a distance from the second position to the first surface of the pallet base is defined as A, a distance from the first position to the second position is defined as B, and an angle formed by a straight line connecting the first position and the second position, and the first surface of the pallet base is defined as θ, C represented by a formula (C) below is more than 0; [Numerical formula 1] $C = \frac{A}{sinθ} - B$

Configuration (2): the pallet base has the pallet base body, the holding member, and a cushioning material, a top face of the cushioning material is the first surface of the pallet base, and the top face of the cushioning material and the roll body are in contact with each other.
The roll package according to claim 1, having the configuration (1).
The roll package according to claim 2, wherein the θ is more than 0° and 14.8° or less.
The roll package according to claim 2 or 3, wherein the A is more than 0 cm and 3 cm or less.
The roll package according to any one of claims 2 to 4, wherein
a ratio of an absolute value of difference between an outer diameter of the holding member and an inner diameter of an open end of the winding core, to the outer diameter of the holding member is 0% or more and 20% or less, and

a height of the holding member is 3 cm or more and 10 cm or less.
The roll package according to any one of claims 2 to 5, wherein the B is 11.32 cm or more and 28.57 cm or less.
The roll package according to any one of claims 2 to 6, wherein a position of an outer periphery of the roll body where a distance from the outer periphery of the roll body to the first surface of the pallet base is longest is defined as a third position, a distance from the first position to the first surface of the pallet base is defined as D, and a distance from the third position to the first surface of the pallet base is defined as E, an absolute value of difference between the D and the E is 9.8 cm or less.
The roll package according to any one of claims 2 to 7, wherein
the pallet base has the pallet base body, the holding member, and a cushioning material, and

a top face of the cushioning material is the first surface of the pallet base.
The roll package according to claim 8, wherein the cushioning material is a polypropylene sheet, a foam polypropylene sheet, a polycarbonate sheet, plastic cardboard, an eco-friendly plastic sheet, or a carton sheet.
The roll package according to claim 1, having the configuration (2).
The roll package according to claim 10, wherein the cushioning material is a polypropylene sheet, a foam polypropylene sheet, a polycarbonate sheet, plastic cardboard, an eco-friendly plastic sheet, or a carton sheet.
The roll package according to any one of claims 1 to 11, wherein the interlayer film for a laminated glass has a thickness that is nonuniform in a width direction of the interlayer film for a laminated glass.
The roll package according to any one of claims 1 to 12, wherein the pallet base body contains iron, resin, stainless, aluminum, wood or carton.
The roll package according to any one of claims 1 to 13, wherein the winding core contains polypropylene, polyethylene, polyvinyl chloride, paper, glass, fabric, wood or fiber-reinforced plastic.