CN111770902A

CN111770902A - Method for producing glass structure sheet

Info

Publication number: CN111770902A
Application number: CN201980015045.7A
Authority: CN
Inventors: 菅野敏广; 平田聪; 小川美优
Original assignee: Nitto Denko Corp
Current assignee: Nitto Denko Corp
Priority date: 2018-03-23
Filing date: 2019-03-15
Publication date: 2020-10-13
Also published as: WO2019181797A1; KR20200135300A; TW201940443A; JP2019167270A

Abstract

Provided is a method for manufacturing a glass structure sheet with high efficiency and high accuracy, wherein a glass structure is cut to obtain a glass structure sheet. The method for producing a glass structure sheet according to the present invention is a method for producing a glass structure sheet by cutting a glass structure provided with thin glass, the method including: a step A of forming a preliminary cutting wire defining a portion to be cut having a corner portion on the thin glass sheet; a step (B) of laminating the glass structure and a carrier film to form a laminate (B); a step C of bending and conveying the laminate b in the thickness direction along a conveying roller, and cutting the thin glass to obtain a glass structure sheet; in the step C, the corner portion a is first introduced into the conveying roller in each planned cutting portion so that two sides joined by the corner portion a each have an angle of 5 ° or more in a plan view with respect to the axial direction of the conveying roller.

Description

Method for producing glass structure sheet

Technical Field

The present invention relates to a method for manufacturing a glass structure sheet. More specifically, the present invention relates to a method for manufacturing a glass structure sheet by cutting a glass structure provided with thin glass.

Background

In recent years, from the viewpoints of transportability, storage property, design property, and the like, a display device, an illumination device, and a solar cell have been increasingly lightweight and thin. In addition, the film-like members used in these apparatuses are also continuously produced by a roll-to-roll process. For example, as a flexible material that can be processed or treated by a roll-to-roll process, it has been proposed to use thin glass (for example, patent documents 1 and 2). Thin glass may be used by laminating a resin film for protecting the thin glass or by laminating an optical film (e.g., a polarizer) for adding a predetermined function.

A member (glass structure sheet) made of thin glass is generally manufactured by obtaining an intermediate product (glass structure) having a large area and then cutting the intermediate product into a predetermined size. When cutting a glass structure sheet from a glass structure, it is required to obtain the glass structure sheet with high accuracy without causing defects such as cracks and end surface damage. It is difficult to satisfy such requirements and manufacture the structural sheet efficiently.

Documents of the prior art

Patent document

Patent document 1: japanese Kohyo publication Hei 1-500990

Patent document 2: japanese laid-open patent publication No. 8-283041

Disclosure of Invention

Technical problem to be solved by the invention

The present invention has been made to solve the above-described problems of the conventional art, and an object of the present invention is to provide a method for efficiently and highly accurately producing a glass structure sheet by cutting a glass structure to obtain a glass structure sheet.

Means for solving the problems

The method for producing a glass structure sheet according to the present invention is a method for producing a glass structure sheet by cutting a glass structure provided with thin glass, the method including: a step A of forming a preliminary cutting wire defining a portion to be cut having at least one corner on the thin glass sheet; a step (B) of laminating the glass structure and a carrier film to form a laminate (B); a step C of bending and conveying the laminate b in the thickness direction along conveying rollers, and cutting the thin glass along the preliminary cutting line to obtain a glass structure sheet; one of the corner portions of each portion to be cut is a corner portion a, and in the step C, when the portion to be cut is made to follow the conveying roller, an angle of each of two sides joined by the corner portion a with respect to the corner portion a of each portion to be cut in a plan view with respect to the axial direction of the conveying roller is set to 5 ° or more, and the corner portion a is made to enter the conveying roller first in each portion to be cut.

In one embodiment, the glass structure is formed of a single thin glass body.

In one embodiment, the glass structure is composed of a thin glass and a layer formed of a material other than the thin glass.

In one embodiment, the layer formed of a material other than the thin glass is a resin layer.

In one embodiment, the thin glass has a thickness of 10 μm to 250 μm.

In one embodiment, the angle formed by the two sides connected by the corner portion a is 60 ° to 120 °.

In one embodiment, the portion to be cut has a rectangular shape.

In one embodiment, the manufacturing method of the present invention includes: when the carrier film is laminated on the glass structure, the pressure for applying a load to the glass structure and the carrier film is set to 1000N/m or less.

In one embodiment, the manufacturing method of the present invention includes: the carrier film and the glass structure are laminated by air injection.

In one embodiment, the angle between each of the two sides joined by the corner portion a and the axial direction of the conveying roller 30 in a plan view is 30 ° to 60 °.

In one embodiment, the manufacturing method of the present invention includes: the conveying rollers are arranged such that the axial direction of the conveying rollers is not orthogonal to the conveying direction of the stacked body b.

In one embodiment, an angle formed between the axial direction of the transport roller and the transport direction of the stacked body b is 30 ° to 60 °.

Effects of the invention

According to the present invention, it is possible to provide a method for manufacturing a glass structure sheet efficiently and highly accurately, the method comprising cutting a glass structure to obtain the glass structure sheet.

Drawings

Fig. 1 is a schematic view for explaining a method for producing a glass structure sheet according to an embodiment of the present invention.

Fig. 2 is a schematic plan view showing the shape of a portion to be cut in the method for producing a glass structure sheet according to the embodiment of the present invention.

Fig. 3 is a schematic view illustrating a process C in one embodiment of the present invention.

Detailed Description

A. Outline of method for producing glass structure sheet

The method for producing a glass structure sheet according to the present invention is a method for producing a glass structure sheet by cutting a glass structure provided with thin glass. In the present specification, the "glass structure" and the "glass structure sheet" are concepts including a single thin glass (including a laminate of thin glass) and a laminate including a thin glass and a layer formed of a material other than the thin glass. The "layer formed using a material other than thin glass" is typically a resin layer.

Fig. 1 is a schematic view for explaining a method for producing a glass structure sheet according to an embodiment of the present invention. The method for producing a glass structure sheet according to the present invention includes: a step A of forming a preliminary cutting line 12 (for example, a preliminary cutting line formed by a scriber, a preliminary cutting line formed by arranging micro holes in a stitch shape, and a preliminary cutting line formed by arranging a broken line in a stitch shape) on the thin glass 10, the preliminary cutting line 12 defining a preliminary cutting portion 11 having at least one corner portion; a step B of laminating the glass structure 100 and the carrier film 20 together to form a laminate B; and a step C of bending and conveying the laminate b in the thickness direction along the conveying rollers 30, and cutting the thin glass 10 along the preliminary cutting line 12 to obtain the glass structure sheet 110.

One of the corner portions of each portion to be cut 11 is a corner portion a, and in the step C, when the portion to be cut is made to follow the conveying roller 30, the angle between each of the two sides joined by the corner portion a and the axial direction of the conveying roller 30 in a plan view is set to 5 ° or more with respect to the corner portion a of each portion to be cut 11, and the corner portion a is made to enter the conveying roller first in each portion to be cut 11. In other words, the method for producing a glass structure sheet of the present invention includes a procedure of cutting the glass structure 100 by bending stress, and the method for producing a glass structure sheet of the present invention includes a procedure of applying bending stress to both sides of the portion to be cut 11 simultaneously at the time of the cutting. In the present invention, the glass structure 100 can be cut with high accuracy by applying a bending force to both sides of the portion to be cut 11 simultaneously using the conveying rollers 30. Further, if the long glass structure 100 is used in the manufacturing method of the present invention, the glass structure 100 can be cut continuously, and the glass structure sheet 110 can be obtained efficiently.

B. Glass structure

The shape of the thin glass included in the glass structure is typically a plate shape. The thin glass is classified according to the composition, and examples thereof include soda lime glass, boric acid glass, aluminosilicate glass, and quartz glass. Further, if the glass is classified according to the alkali component, alkali-free glass and low-alkali glass are exemplified. Alkali metal component (e.g., Na) of the above thin glass₂O、K₂O、Li₂O) is preferably 15 wt% or less, more preferably 10 wt% or less.

Any suitable method can be used for forming the thin glass. Typically, the thin glass is produced by melting a mixture containing a main raw material such as silica or alumina, an antifoaming agent such as mirabilite or antimony oxide, and a reducing agent such as carbon at 1400 to 1600 ℃, forming the molten mixture into a thin plate, and then cooling the thin glass. Examples of the thin plate forming method of the thin glass include a flow-hole drawing method, a melting method, a float glass method, and the like. The thin glass formed into a plate shape by these methods may be chemically polished with a solvent such as hydrofluoric acid as necessary for thinning or improving smoothness.

The thickness of the thin glass is preferably 10 μm to 250 μm, more preferably 20 μm to 200 μm, still more preferably 30 μm to 200 μm, and particularly preferably 30 μm to 100 μm.

In one embodiment, a glass structure includes a thin glass and a resin layer disposed on at least one side of the thin glass. As the material constituting the resin layer, any suitable material can be used. Examples of the material constituting the resin film include polyvinyl alcohol (PVA) -based resins, polyolefin-based resins, cycloolefin-based resins, polycarbonate-based resins, cellulose-based resins, polyester-based resins, polyamide-based resins, polyimide-based resins, polyether-based resins, polystyrene-based resins, (meth) acrylic urethane-based resins, polysulfone-based resins, acetate-based resins, epoxy-based resins, silicone-based resins, polyarylate-based resins, polysulfone-based resins, polyetherimide-based resins, epoxy-based resins, urethane-based resins, silicone-based resins, and the like. The resin layer may be disposed directly on the thin glass, or may be laminated on the thin glass via any suitable adhesive or bonding agent.

In one embodiment, the resin film has a transparent conductive layer. The resin film with a transparent conductive layer is formed by disposing the transparent conductive layer on the resin film. Examples of the transparent conductive layer include a metal oxide layer, a metal layer, a layer containing a conductive polymer, a layer containing metal nanowires, and a layer made of a metal mesh.

In one embodiment, an optical film may be used as the resin layer. Examples of the optical film include a polarizing plate (optical film having a polarizing function), a retardation plate, and an isotropic film.

The length of the glass structure is, for example, 200 to 3000 m. The width of the glass structure is, for example, 200mm to 2000 mm.

C. Process A

As described above, in the step a, the preliminary cutting line is formed on the thin glass. The preliminary cutting line defines a portion to be cut. In step C, which is a subsequent step, the glass structure sheet is cut along the preliminary cutting line to obtain a glass structure sheet corresponding to the shape of the portion to be cut.

Fig. 2 is a schematic plan view showing the shape of a portion to be cut in the method for producing a glass structure sheet according to the embodiment of the present invention. In fig. 2, a portion to be cut 11 having a rectangular shape is defined by a preliminary cutting line 12. The preliminary cutting line 12 of fig. 2 is formed by arranging micro holes in a stitch shape. The preliminary cutting line formed by arranging the fine holes in a stitch shape means a preliminary cutting line formed by continuously or intermittently providing fine through holes in the thin glass. The diameter of the fine pores is, for example, 0.1 to 10 μm, preferably 0.1 to 5 μm. The pitch of the micropores is, for example, 0.1 to 10 μm, preferably 0.1 to 5 μm. When the amount is within this range, the glass structure can be cut with higher accuracy. The micro holes may be provided by any suitable method. For example, any suitable laser may be used. As the laser, for example, an ultrashort pulse laser can be used.

The form of the preliminary cutting wire is not limited to the illustrated example, and any appropriate form may be adopted as long as the effects of the present invention can be obtained. Other examples of the preliminary cutting wire include a preliminary cutting wire formed by a scriber, a preliminary cutting wire formed by arranging intermittent wires in a stitch shape, and the like. The preliminary cutting line formed by the scriber is a preliminary cutting line formed of a flaw formed so as not to penetrate through the thin glass. The preliminary cutting line formed by the scriber may be formed using, for example, a scriber including cemented carbide particles or diamond particles, an arbitrary appropriate laser, an arbitrary appropriate cutter, or the like. The preliminary cutting line formed by arranging the intermittent lines in a stitch shape means a preliminary cutting line formed by intermittently providing a predetermined length of line penetrating the thin glass. The length of the wire penetrating the thin glass is, for example, 0.1mm to 30 mm. The interval between the lines penetrating the thin glass is, for example, 0.1mm to 10 mm. The lines through the thin glass may be provided by any suitable method. For example, any suitable laser may be used.

When the glass structure is composed of thin glass and a layer made of a material other than thin glass, the layer made of a material other than thin glass is preferably cut at a position and in a shape corresponding to the portion to be cut. When the glass structure is a glass structure having a thin glass and a resin layer disposed on one side of the thin glass, the resin layer can be cut by using a laser (for example, CO)₂Laser emitted by a laser), a method using a cutter, and the like.

As described above, the portion to be cut 11 has at least one corner. The corner may be a joint (i.e., a corner) of two sides or may be formed by a curved line. Preferably, in step C, a corner (corner a) of each part to be cut 11, which first enters the conveying roller, is a joint of two sides. If the corner portion a is a joint (i.e., a corner) of two sides, the glass structure can be cut with higher precision. When the corner portion a is formed of a curved line, the curvature radius of the curved line is preferably 1mm to 10mm, more preferably 2mm to 5 mm. The length of the curve is preferably 20mm or less, and more preferably 3mm to 8 mm.

The angle formed by the two

sides

12a, 12b connected by the corner a is preferably 30 ° to 170 °, more preferably 45 ° to 150 °, still more preferably 60 ° to 120 °, particularly preferably 75 ° to 105 °, and most preferably 80 ° to 100 °.

The portion to be cut may have any suitable shape as long as it has at least one corner portion. The portion to be cut off has a closed shape. Examples of the shape of the portion to be cut include a triangle, a quadrangle (rectangle, square, rhombus, parallelogram), a polygon having at least a pentagon, and the like. The portion to be cut may have a shape including a curve in part. In one embodiment, the shape of the portion to be cut is a quadrangle (preferably a rectangle). In one embodiment, the portion to be cut has a line-symmetrical shape, and more preferably a line-symmetrical shape in which the symmetry axis passes through the corner portion a. If the portion to be cut is formed in such a shape, a bending force can be applied to the portion to be cut in a laterally uniform manner, and occurrence of unnecessary cracks and the like can be prevented. Examples of the line-symmetrical shape include an isosceles triangle, a regular triangle, a square, and a rhombus, and a square is preferable.

The area of the portion to be cut may be any appropriate area according to the size of the desired glass structure sheet. The area of the portion to be cut is, for example, 1cm²～2500cm²Preferably 4cm²～900cm²More preferably 9cm²～100cm²。

D. Step B

As described above, in step B, the glass structure 100 and the carrier film 20 are laminated together to form the laminate B. The carrier film 20 is used to convey the plurality of glass structure sheets 110 obtained in step C. Carrier film 20 may have an adhesive layer comprising any suitable adhesive. In one embodiment, the carrier film 20 is laminated to the glass structure in a peelable manner via the adhesive layer.

In one embodiment, the carrier film 20 is laminated on one surface of the glass structure 100 while the glass structure 100 is conveyed by a roller. Preferably, the carrier film 20 is continuously laminated on the glass structure 100 having a long length by using the carrier film 20 having a long length.

In one embodiment, in the case of using a carrier film with an adhesive layer, the carrier film with an adhesive layer is fed in a long form, and the adhesive is applied to the carrier film to form an adhesive, and thereafter, the carrier film with an adhesive layer and a glass structure are laminated together without winding the carrier film with an adhesive layer. As the method of applying the adhesive, any appropriate method can be adopted. Alternatively, a carrier film with an adhesive layer separately prepared may be laminated together with a glass structure.

When the carrier film is laminated on the glass structure, the pressure (lamination pressure) for applying a load to the glass structure and the carrier film is preferably 1000N/m or less. Within such a range, unnecessary cracking, damage, and the like of the thin glass of the glass structure can be prevented.

In one embodiment, the lamination of the carrier film and the glass structure is performed using a nip roll. In this embodiment, the lamination pressure at the time of lamination is preferably 10N/m to 1000N/m, more preferably 10N/m to 500N/m.

Preferably, an elastic roll is used as the nip roll. Examples of the material constituting the elastic roller include rubber and sponge made of urethane resin. The Asker-C hardness (hardness of spring type Asker-C specified in SRIS0101 standard) of the nip roll is 1 to 70, preferably 10 to 50, more preferably 15 to 40, and still more preferably 20 to 35. Within such a range, unnecessary cracking, damage, and the like of the thin glass of the glass structure can be prevented. The diameter of the nip roll is not particularly limited, and is, for example, 25mm to 300 mm. The width of the nip roll is not particularly limited, and may be appropriately set according to the width of the glass structure to be conveyed.

In another embodiment, the lamination of the carrier film and the glass structure is performed by spraying air. In this mode, the pressure applied to the glass structure is substantially zero. The air was jetted at a time point when the carrier film and the glass structure were sufficiently close to each other. The air may be injected before the carrier film is brought into contact with the glass structure, or the air may be injected after the carrier film is brought into contact with the glass structure. The injection of air may be performed using any suitable air injection device.

As a material for forming the carrier film, any appropriate resin can be used. Examples of the material for forming the carrier film include ester resins such as polyethylene terephthalate resins, cycloolefin resins such as norborene resins, olefin resins such as polyethylene and polypropylene, polyamide resins, polycarbonate resins, and copolymer resins thereof. Preferred are ester-based resins (particularly polyethylene terephthalate-based resins) and polyolefin-based resins (particularly polyethylene-based resins).

The thickness of the carrier film is preferably 3 to 250. mu.m, more preferably 5 to 250. mu.m, and still more preferably 20 to 150. mu.m.

The adhesion of the carrier film to glass is preferably 0.01N/25mm to 0.5N/25mm, more preferably 0.03N/25mm to 0.2N/25mm, and still more preferably 0.05N/25mm to 0.1N/25 mm. If a carrier film having such a bonding force is used, the conveyance of the glass structure sheet is not hindered, and the carrier film can be easily peeled off without any need for the carrier film. Note that the adhesion can be obtained by coating the surface of the steel sheet according to JIS Z0237: 2000 (tensile speed 300 mm/min, peel angle 180 ℃ and measurement temperature 23 ℃).

The carrier film preferably has an elastic modulus at 23 ℃ of 2 to 6GPa, more preferably 3 to 5GPa, and still more preferably 4 to 5 GPa. If a carrier film having such an elastic modulus is used, a large load can be prevented from being applied to a workpiece (glass structure or glass structure sheet) passing through the feed roller. The elastic modulus can be measured according to JIS K7127.

E. Step C

Fig. 3 is a schematic diagram illustrating a step C in one embodiment of the present invention. As described above, in step C, the laminate (laminate B) of the carrier film and the glass structure formed in step B is bent in the thickness direction along the conveying rollers and conveyed, and the thin glass is cut along the preliminary cutting line to obtain a glass structure sheet. Fig. 3 is a view of the laminated body b passing through the conveying roller 30 as viewed from above.

As described above, in the step C, when the portion to be cut is made to follow the conveying roller 30, one corner portion (corner portion a) of the corner portions of the portion to be cut is first advanced into the conveying roller so that the angle between each of the two

sides

12a, 12b joined by the corner portion a and the axial direction of the conveying roller 30 in a plan view is 5 ° or more.

The angles x and y of the two

sides

12a and 12b joined by the corner a in the plan view of the conveyor roller 30 in the axial direction are preferably 5 ° to 75 °, more preferably 15 ° to 67.5 °, still more preferably 30 ° to 60 °, particularly preferably 37.5 ° to 52.5 °, and most preferably 40 ° to 50 °. The angles x and y in the plan view are angles that are acute in the angle formed by each of the two sides joined by the corner portion a and the axial direction of the conveying roller.

The ratio (x/y) of the angle x in the top view in the axial direction of the conveyor roller 30 to the angle x of one of the two sides 12a joined by the corner a and the angle y in the top view in the axial direction of the conveyor roller 30 to the angle y of the other of the two sides 12b joined by the corner a is preferably 0.6 to 1.6, more preferably 0.8 to 1.25, and still more preferably 0.9 to 1.1. When the angle x in the top view is close to the angle y in the top view, the glass structure can be cut with higher precision.

As shown in fig. 3(a), in one embodiment, the conveying rollers 30 for cutting are arranged such that the axial direction thereof is substantially orthogonal to the conveying direction of the stacked body b.

As shown in fig. 3(b), in another embodiment, the cutting conveyor rollers 30 are arranged such that the axial direction thereof is not orthogonal to the conveying direction X of the laminate b. In this embodiment, the angle z of the angle (acute angle side) formed by the axial direction of the conveying roller 30 and the conveying direction X of the stacked body b is preferably 10 ° to 80 °, more preferably 20 ° to 70 °, still more preferably 30 ° to 60 °, and particularly preferably 40 ° to 50 °. The angle z can be set as appropriate according to the formation manner of the portion to be cut.

When one of the sides of the portion to be cut connected to the corner portion a is substantially orthogonal to the transport direction X of the stacked body b, an embodiment in which the axial direction of the transport roller is not orthogonal to the transport direction X of the stacked body b may be preferably employed. For example, in the case where the glass structure includes an optical film (e.g., a polarizer) having an optical axis, and the optical axis is formed so as to be orthogonal to the longitudinal direction of the optical film and/or so as to be parallel to the longitudinal direction of the optical film, and even after cutting, the optical axis in a specific direction is required to be present in the glass structure sheet, if the above-described embodiment is employed, the glass structure sheet can be efficiently obtained. In this embodiment, when the section to be cut has a rectangular shape, the angle z of the angle (acute angle side) formed by the axial direction of the conveying roller 30 for cutting and the conveying direction X of the stacked body b is preferably 20 ° to 70 °, more preferably 25 ° to 65 °, still more preferably 30 ° to 60 °, particularly preferably 40 ° to 50 °, and most preferably 43 ° to 47 °.

As the conveying roller for cutting, any appropriate conveying roller may be used. For example, a hard chrome plated conveying roller, a resin-made conveying roller, or the like can be used. In addition, the feed roller is a concept including an Air turn bar. The cutting may be performed without bringing the conveying roller into contact with the stacked body b by using an air-operated steering lever as the conveying roller.

The roller diameter of the conveying roller is preferably 50mm to 300mm, and more preferably 75mm to 150 mm. The width of the conveying roller is not particularly limited, and may be appropriately set according to the width of the glass structure to be conveyed.

The wrap angle of the laminated body b on the conveying roller is preferably 30 ° to 120 °, and more preferably 40 ° to 90 °.

Through the steps a to C, a glass structure sheet having a predetermined shape can be obtained. Preferably, the steps a to C are performed continuously (i.e., without winding the work after the steps a and B using the long glass structure). The production line speed in the production of the glass structure sheet may be set to any appropriate speed within a range in which the effects of the present invention can be obtained. The line speed in the step C is, for example, 1 to 30 m/min. The manufacturing process of the glass structure sheet may be accompanied by inching control. For example, in the step a, the production line may be temporarily stopped by jog control in order to form a preliminary line for cutting on the thin glass.

The method for producing the glass structure sheet may include any appropriate preceding step and/or subsequent step. For example, in the case where the glass structure includes a layer made of a material other than thin glass on one or both surfaces of the thin glass, a step of laminating the thin glass and the layer (for example, an optical film), a step of cutting the layer (for example, the optical film) in accordance with the size and position of the portion to be cut, and the like may be performed before the step a. After step C, the carrier film may be cut, and the glass structure sheets may be separated and singulated.

The sheet of glass construct may also be provided with a carrier film. In the glass structure sheet with a carrier film, the carrier film can function as a protective film for the glass structure sheet.

Description of the reference numerals

10 thin glass

11 to-be-cut portion

12 preliminary wire for cutting

20 carrier film

30 feed roller

100 glass structure

110 glass structure sheet

Claims

1. A method for manufacturing a glass structure sheet by cutting a glass structure provided with thin glass, comprising:

a step A of forming a preliminary cutting wire defining a portion to be cut having at least one corner on the thin glass sheet;

a step (B) of laminating the glass structure and a carrier film to form a laminate (B);

a step C of bending and conveying the laminate b in the thickness direction along conveying rollers, and cutting the thin glass along the preliminary cutting line to obtain a glass structure sheet;

one of the corner portions of each portion to be cut is a corner portion a, and in the step C, when the portion to be cut is made to follow the conveying roller, an angle of each of two sides joined by the corner portion a with respect to the corner portion a of each portion to be cut in a plan view with respect to the axial direction of the conveying roller is set to 5 ° or more, and the corner portion a is made to enter the conveying roller first in each portion to be cut.

2. The method of manufacturing a glass structural sheet according to claim 1,

the glass structure is composed of a thin glass single body.

3. The method of manufacturing a glass structural sheet according to claim 1,

the glass structure is composed of a thin glass and a layer formed of a material other than the thin glass.

4. The method for manufacturing a glass structural sheet according to claim 3,

the layer formed of a material other than the thin glass is a resin layer.

5. The method for manufacturing a glass structural sheet according to any one of claims 1 to 4,

the thickness of the thin glass is 10-250 mu m.

6. The method for producing a glass structural sheet according to any one of claims 1 to 5, wherein an angle formed by two sides connected by the corner portion a is 60 ° to 120 °.

7. The method for manufacturing a glass structural sheet according to any one of claims 1 to 5,

the shape of the portion to be cut is a rectangular shape.

8. The method for manufacturing a glass structural sheet according to any one of claims 1 to 7,

when the carrier film is laminated on the glass structure, the pressure for applying a load to the glass structure and the carrier film is set to 1000N/m or less.

9. The method for producing a glass structure sheet according to any one of claims 1 to 8, wherein the lamination of the carrier film and the glass structure is performed by air blasting.

10. The method for manufacturing a glass structural sheet according to any one of claims 1 to 9,

an angle formed by each of two sides joined by the corner portion a and the axial direction of the conveying roller in a plan view is 30 ° to 60 °.

11. The method for manufacturing a glass structural sheet according to any one of claims 1 to 10,

the conveying rollers are arranged such that the axial direction of the conveying rollers is not orthogonal to the conveying direction of the laminated body b.

12. The method of manufacturing a glass structural sheet according to claim 11,

an angle formed between the axial direction of the conveying roller and the conveying direction of the laminated body b is 30 to 60 degrees.