JP2002036364A - Method for manufacturing film reinforced glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture film reinforced glass of high quality having an organic resin film excellent in surface smoothness by preventing the generation of unevenness in the surface of the organic resin film caused by pressure, in a method for manufacturing film reinforced glass by interposing an adhesive resin layer between a glass plate and the organic resin film to laminate the glass plate and the film to press both of them in the lamination direction under heating to integrally bond them. SOLUTION: The glass plate 1 and the organic resin film 3 are laminated through the adhesive resin layer 2 and a press plate 12 is further laminated on the organic resin film 3 through a mesh 11 to press the glass plate 1 and the organic resin film 3 through the press plate in a lamination direction under heating to integrally bond them. Thereafter, the mesh 11 and the press plate 12 are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a film-reinforced glass used for automobiles, railway cars, buildings, showcases, etc., and more particularly, to a method for forming an adhesive resin layer between a glass plate and an organic resin film. After laminating these through
In a method of manufacturing a film reinforced glass by applying pressure and heating in the laminating direction and bonding and integrating, the occurrence of unevenness on the surface of the organic resin film due to pressure is prevented, and the organic resin film surface has excellent smoothness. The present invention relates to a method for producing high-quality film-reinforced glass.

[0002]

2. Description of the Related Art Conventionally, laminated glass having a structure in which an organic resin film (intermediate film) is sandwiched between two glass plates is generally used for glass used for automobiles, particularly for windshields. As this organic resin film, a polyvinyl butyral (PVB) resin film is generally used because of its excellent impact resistance, and the penetration resistance and the like of the laminated glass are enhanced by the presence of this organic resin film. In addition, the broken glass fragments remain adhered to the organic resin film in response to an external impact, so that scattering of the broken glass fragments is prevented. Therefore, even if the laminated glass of an automobile is broken for the purpose of theft, intrusion, or the like, the window cannot be freely opened, so that it is also useful as security glass.

[0003] On the other hand, for example, door glass and glazing of automobiles are generally less likely to be destroyed in an accident.
Further, since it does not require the penetration resistance or the like of the above-mentioned windshield, a slightly strengthened low-strength glass sheet is used. However, when only one such glass plate is used, it is inferior to laminated glass in terms of impact resistance, penetration resistance and the like. If it is destroyed for the purpose of theft, intrusion, or the like, it breaks into many pieces, and the windows can be freely opened.
Therefore, it is desired to use a glass having a strength comparable to that of a laminated glass for a door glass, a fitted glass, and the like.

On the other hand, in the case of a film reinforced glass in which an organic resin film is laminated and bonded and integrated on one glass plate, the glass plate is reinforced by the organic resin film, the strength is increased, and the broken pieces at the time of breakage are broken. Is also prevented from scattering. Moreover, since this film-reinforced glass is composed of one glass plate, an organic resin film and an adhesive resin layer, it is possible to significantly reduce the thickness and weight as compared with a conventional laminated glass using two glass plates. .

[0005] Such a film-reinforced glass is generally manufactured as follows. First, as shown in FIG. 3A, an organic resin film 3 is laminated on a glass plate 1 with an adhesive resin film 2 interposed therebetween, and this laminated body 4 is placed in a non-breathable bag 5 made of rubber or the like. (FIG. 3 (b)), and the inside of the bag 5 is evacuated and heated to form a glass plate 1.
And the organic resin film 3 (FIG. 3C). In this method, the laminate 4 is pressed in the thickness direction by evacuating the inside of the bag 5, and the glass plate 1 and the organic resin film 3 are bonded and integrated by simultaneous heating.

[0006]

The above-mentioned conventional method for producing a film-reinforced glass has the following problems.

That is, since the vacuum bag 5 is in direct contact with the surface of the organic resin film 3, foreign matter such as dust is entrained in the process of storing the laminate 4 in the bag 5, and the foreign matter such as dust is formed between the organic resin film 3 and the bag 5. When there is an intermediate space, FIG.
As shown in FIG. 3D, which is an enlarged view of the portion D, the surface of the organic resin film 3 is locally pressed by the foreign matter 6, so that the surface of the organic resin film of the obtained film-reinforced glass has irregularities. Occurs, and a film-reinforced glass having excellent surface smoothness cannot be obtained.

Further, in the vacuum bag 5, the 4
Since the pressing direction is dispersed at the peripheral edge, the laminated body 4 receives a greater pressure at the peripheral edge than at the center side, and is therefore an enlarged view of the portion E in FIG. 3C. As shown in FIG. 3 (e), four peripheral edges are low step portions 3.
A. The low step portion is shown in FIG.
As shown in (f), in the obtained film-reinforced glass 7, wrinkles are formed in a frame shape at the four peripheral edges, thereby deteriorating not only smoothness but also appearance, and significantly impairing commercial value. In addition, by receiving a large pressure at the peripheral edge of the periphery of 4 as described above, the adhesive resin of the adhesive resin film 2 fluidized by heating protrudes from the space between the organic resin film 3 and the glass plate 1 to the end face, and this protrudes. The high quality value is also impaired by the adhesive resin 2A.

The present invention solves the above-mentioned conventional problems, and after laminating these between a glass plate and an organic resin film with an adhesive resin layer interposed therebetween, presses in the laminating direction and heats to bond and integrate. In the method for producing a film-reinforced glass by providing a method for producing a high-quality film-reinforced glass excellent in smoothness of the organic resin film surface by preventing the occurrence of unevenness on the surface of the organic resin film due to pressure. The purpose is to:

[0010] Another object of the present invention is to provide a method for producing a film-reinforced glass which prevents the adhesive resin from protruding from a side end surface in producing such a film-reinforced glass.

[0011]

The method for producing a film-reinforced glass of the present invention comprises the steps of:
After laminating through an adhesive resin layer between these, in the method of manufacturing a film-reinforced glass having a heating and pressing step of heating and pressing and heating in the laminating direction to bond and integrate the glass plate and the organic resin film, A pressing plate is further laminated via a mesh on the organic resin film laminated on the glass plate, and the above-described pressurization is performed through the pressing plate. The pressing plate is removed.

In the method of the present invention, a pressing plate is laminated via a mesh on an organic resin film laminated on a glass plate, and pressure is applied via the pressing plate. A uniform pressure is applied, and the smoothness of the pressing plate is reflected, so that it is possible to obtain a film-reinforced glass excellent in the smoothness of the surface without irregularities and frame-shaped wrinkles at the edges.

[0013] In this method, an enclosing frame surrounding the four sides is placed on the laminated body of the glass plate, the adhesive resin layer, the organic resin film, the mesh and the pressing plate, and the heating and pressurizing is performed. At this time, the adhesive resin is prevented from protruding from the side end surface, and the occurrence of frame-shaped wrinkles due to uneven pressure at the side edges is more reliably prevented.

In the heating and pressurizing step of the present invention, the laminate is housed in an air-impermeable bag, and is evacuated from the bag to press the laminate in the laminating direction and to heat the laminate. Is preferred.

In the present invention, the adhesive resin is EV
A (ethylene-vinyl acetate copolymer) resin is preferred.
As the organic resin film, a PET (polyethylene terephthalate) resin film is preferable.

The mesh arranged on the organic resin film has a wire diameter of 20 to 200 μm and a density of 20 to 20 μm.
A mesh made of organic fibers having a thickness of 0 / inch and a thickness of 30 to 350 μm is preferable.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a view showing an embodiment of a method for producing a film-reinforced glass according to the present invention.
1B is a cross-sectional view, and FIG. 1C is a plan view. FIG. 2 is a plan view showing an embodiment of the surrounding frame used in the present invention.

In the method shown in FIG. 1, an organic resin film 3 is laminated on a glass plate 1 via an adhesive resin film 2, and a pressing plate 12 is further laminated on the organic resin film 3 via a mesh 11. . And this laminate 1
3, an enclosing frame 14 surrounding its four sides is arranged, and in this state, it is housed in a non-breathable bag such as a rubber bag in the same manner as in the conventional method, and the inside of the bag is evacuated and heated to form a glass plate. 1 and the organic resin film 3 are bonded. Thereafter, the laminated body 13 is taken out of the bag, and the mesh 11 and the pressing plate 12 are removed to obtain a film-reinforced glass in which the glass plate 1 and the organic resin film 3 are bonded and integrated with an adhesive resin layer.

In the obtained film-reinforced glass, the smoothness of the pressing plate 12 is reflected on the organic resin film 3,
Since the surface is remarkably excellent in smoothness, and since the surrounding frame 14 is in contact with the side surface during heating and pressurizing, there is no problem of the adhesive resin protruding, and the bias of the pressure on the side edge is also prevented. You.

In the present invention, the glass plate 1 is not particularly limited, and its thickness is arbitrary. In the case of glass for automobiles, silicate glass is usually used. When used for side glass and embedded glass, it is not necessary to be as thick as a windshield, and it is generally 1 to 10 mm, preferably 3 to 10 mm.
5 mm. This glass plate 1 is preferably chemically or thermally strengthened. In addition, glass plate 1
May be provided with a transparent conductive layer made of a metal and / or a metal oxide.

On the other hand, the organic resin film 3 is
The organic resin film 1 is preferably provided as a PET resin film, and the thickness of the organic resin film 3 is determined according to the application. The range of about 2 to 2 mm is general, and the range of 0.5 to 1 mm is preferable.

It is preferable that a hard coat layer is formed on the surface of the organic resin film 1 in order to improve the scratch resistance and the like of the surface.

As the resin used for the hard coat treatment, a UV (ultraviolet) curable resin is suitable, but any other resin having a low molecular weight and polyfunctionality suitable for the hard coat treatment is not particularly limited. Absent. Examples of the UV-curable resin include oligomers such as urethane oligomers, polyester oligomers and epoxy oligomers having a plurality of ethylenic double bonds, pentaerythritol tetraacrylate (PETA), pentaerythritol tetramethacrylate, and dipentaerythritol hexaacrylate (DPEHA). ), Or an oligomer such as benzoin, benzophenone, benzoylmethyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin butyl ether or dibenzyl. The UV-curable resin generally uses a reactive diluent and a photopolymerization initiator, and may further contain various additives. The oligomer, reactive diluent and initiator may be used alone or in combination of two or more. The content of the reactive diluent is generally 0.1 to 10 parts by weight with respect to 100 parts by weight of the UV-curable resin.
5 to 5 parts by weight are preferred. The content of the photopolymerization initiator is U
It is preferably 5 parts by weight or less based on 100 parts by weight of the V-curable resin.

In addition to the PET resin film, a resin film such as an acrylic resin film or a polycarbonate resin film can be used as the organic resin film. However, it is preferable to use a PET resin film in terms of mechanical characteristics and the like.

In the present invention, the adhesive resin for bonding the glass plate 1 and the organic resin film 3 is EVA, ethylene-methyl acrylate copolymer, ethylene- (meth)
Acrylic acid copolymer, ethylene-ethyl (meth) acrylate copolymer, ethylene-methyl (meth) acrylate copolymer, metal ion crosslinked ethylene- (meth) acrylic acid copolymer, partially saponified ethylene-vinyl acetate Ethylene copolymers such as copolymer, carboxylated ethylene-vinyl acetate copolymer, ethylene- (meth) acryl-maleic anhydride copolymer, ethylene-vinyl acetate- (meth) acrylate copolymer and the like. (Note that "(meth) acryl" indicates "acryl or methacryl.") In addition, polyvinyl butyral (PVB) resin, epoxy resin, acrylic resin, phenol resin, silicone resin, polyester resin, urethane resin, etc. can also be used, but EVA is most balanced in terms of performance and easy to use.
It is. Further, PVB resins used in laminated glass for automobiles are also suitable in terms of impact resistance, penetration resistance, adhesiveness, transparency and the like.

As the PVB resin, a polyvinyl acetal unit is 70 to 95% by weight, and a polyvinyl acetate unit is 1 to
At 15% by weight, the average degree of polymerization is 200 to 3000, especially 3
It is preferably from 00 to 2500, and the PVB resin is used as a resin composition containing a plasticizer. Examples of the plasticizer for the PVB resin composition include organic plasticizers such as monobasic acid esters and polybasic acid esters, and phosphoric acid plasticizers.

The monobasic acid esters include butyric acid, isobutyric acid, caproic acid, 2-ethylbutyric acid, heptanoic acid, n-octylic acid, 2-ethylhexylic acid, pelargonic acid (n-
Esters obtained by the reaction of an organic acid such as nonylic acid) and decylic acid with triethylene glycol, and more preferably triethylene-di-2-ethylbutyrate and triethylene glycol-di-2-ethylhexo. Ethates, triethylene glycol-di-capronate, triethylene glycol-di-n-octoate and the like. Note that an ester of the above organic acid with tetraethylene glycol or tripropylene glycol can also be used.

As the polybasic acid ester-based plasticizer, for example, an ester of an organic acid such as adipic acid, sebacic acid, azelaic acid and a linear or branched alcohol having 4 to 8 carbon atoms is preferable, and more preferably. , Dibutyl sebacate, dioctyl azelate, dibutyl carbitol adipate and the like.

Examples of the phosphoric acid plasticizer include tributoxyethyl phosphate, isodecylphenyl phosphate, triisopropyl phosphate and the like.

In the PVB resin composition, if the amount of the plasticizer is small, the film-forming property is reduced, and if the amount is large, the durability under heat is impaired. Therefore, the plasticizer is added in an amount of 5 to 100 parts by weight of the polyvinyl butyral resin. 50 parts by weight, preferably 10-4
0 parts by weight.

The PVB resin composition may further contain additives such as a stabilizer, an antioxidant, and a UV absorber for preventing deterioration.

The EVA resin preferably has a vinyl acetate content of 10 to 50% by weight, especially 15 to 40% by weight. If the vinyl acetate content is less than 10% by weight, the transparency of the resin obtained when cross-linking and curing at a high temperature is not sufficient, and if it exceeds 50% by weight, impact resistance and
The penetration resistance tends to be insufficient.

The EVA resin composition may contain various additives such as a plasticizer, an organic peroxide as a cross-linking agent, and an adhesion improver.

The plasticizer is not particularly limited, but generally, esters of polybasic acids and esters of polyhydric alcohols are used. Examples thereof include dioctyl phthalate, dihexyl adipate and triethylene glycol-2. -Ethyl butyrate, butyl sebacate, tetraethylene glycol diheptanoate and triethylene glycol diperargonate. One type of these plasticizers may be used, or two or more types may be used in combination. The content of the plasticizer is EVA resin 1
The range is preferably not more than 5 parts by weight to 00 parts by weight.

As the organic peroxide, any organic peroxide can be used as long as it decomposes at a temperature of 100 ° C. or more to generate radicals. Organic peroxide is
In general, the temperature is selected in consideration of the film forming temperature, composition adjustment conditions, curing (bonding) temperature, heat resistance of the adherend, and storage stability. In particular, those having a decomposition temperature of 70 ° C. or more with a half-life of 10 hours are preferred.

Examples of the organic peroxide include 2,5-
Dimethylhexane-2,5-dihydroperoxide, 2,5-dimethyl-2,5-di (t-butylperoxy) hexane-3-di-t-butylperoxide,
t-butylcumyl peroxide, 2,5-dimethyl-
2,5-di (t-butylperoxy) hexane, dicumyl peroxide, α, α′-bis (t-butylperoxyisopropyl) benzene, n-butyl-4,4-bis (t-butylperoxy) ) Valerate, 1,1-bis (t-butylperoxy) cyclohexane, 1,1-bis (t-butylperoxy) -3,3,5-trimethylcyclohexane, t-butylperoxybenzoate,
Benzoyl peroxide, t-butyl peroxyacetate, methyl ethyl ketone peroxide, 2,5-
Dimethylhexyl-2,5-bisperoxybenzoate, butyl hydroperoxide, p-menthane hydroperoxide, p-chlorobenzoyl peroxide, hydroxyheptyl peroxide, chlorohexanone peroxide, octanoyl peroxide,
Decanoyl peroxide, lauroyl peroxide, cumyl peroxy octoate, succinic peroxide, acetyl peroxide, t-butyl veroxy (2-ethylhexanoate), m-toluoyl peroxide, t-butyl peroxy Mention may be made of isobutyrate and 2,4-dichlorobenzoyl peroxide. One of these organic peroxides may be used, or two or more thereof may be used in combination. The content of the organic peroxide is 0.1 to 100 parts by weight of the EVA resin.
A range of 1 to 5 parts by weight is preferred.

By including such an organic peroxide, the curability by heating can be improved, and the film strength of the obtained adhesive layer can be improved.

As an adhesion improver, a silane coupling agent can be added. Examples of the silane coupling agent include γ-chloropropylmethoxysilane, vinylethoxysilane, vinyltris (β-methoxyethoxy) silane, γ-methacryloxypropyltrimethoxysilane, vinyltriacetoxysilane, γ-glycidoxypropyltrisilane. Methoxysilane, γ-glycidoxypropyltriethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, vinyltrichlorosilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, N- β-
(Aminoethyl) -γ-aminopropyltrimethoxysilane. These silane coupling agents may be used alone or in combination of two or more. The content of the silane coupling agent is E
The amount is preferably 5 parts by weight or less based on 100 parts by weight of the VA resin.

Further, the EVA resin composition has various physical properties of the adhesive layer (optical properties such as mechanical strength, adhesiveness, transparency, etc.).
It is preferable to contain an acryloxy group-containing compound, a methacryloxy group-containing compound and / or an epoxy group-containing compound in order to improve or adjust heat resistance, light resistance, cross-linking speed, etc.), and particularly to improve mechanical strength.

The acryloxy group-containing compound and methacryloxy group-containing compound to be used are generally acrylic acid or methacrylic acid derivatives, for example, esters or amides of acrylic acid or methacrylic acid. Examples of the ester residue include linear alkyl groups such as methyl, ethyl, dodecyl, stearyl, lauryl, cyclohexyl, tetrahydrofurfuryl, aminoethyl, 2-hydroxyethyl, 3-hydroxypropyl, A 3-chloro-2-hydroxypropyl group can be mentioned. Further, esters of polyhydric alcohols such as ethylene glycol, triethylene glycol, polypropylene glycol, polyethylene glycol, trimethylolpropane and pentaerythritol with acrylic acid or methacrylic acid can also be mentioned.

Examples of the amide include diacetone acrylamide.

Examples of the polyfunctional compound include esters obtained by esterifying a plurality of acrylic acids or methacrylic acids with glycerin, trimethylolpropane, pentaerythritol and the like.

Examples of the epoxy group-containing compound include triglycidyl tris (2-hydroxyethyl) isocyanurate, neopentyl glycol diglycidyl ether,
1,6-hexanediol diglycidyl ether, allyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, phenol (ethyleneoxy) ₅ glycidyl ether, pt-butylphenyl glycidyl ether, adipic acid diglycidyl ester, phthalic acid Examples thereof include diglycidyl ester, glycidyl methacrylate, and butyl glycidyl ether.

The content of the acryloxy group-containing compound, the methacryloxy group-containing compound and / or the epoxy group-containing compound is preferably 5 parts by weight or less based on 100 parts by weight of the EVA resin.

The adhesive resin film 2 can be manufactured by forming such an adhesive resin composition into a sheet by ordinary extrusion molding, calender molding or the like. Alternatively, the resin composition may be dissolved in a solvent, and this solution may be coated on a suitable support with a suitable coating machine (coater) and dried to form a coating film, thereby forming a sheet.

If the thickness of the adhesive resin film 2 is too thin, sufficient adhesive strength, shock absorption resistance, and penetration resistance cannot be obtained, and if it is too thick, the transparency is reduced or the thickness of the film-reinforced glass is reduced. It is preferable to set the thickness to about 25 to 250 μm because it is damaged.

The mesh 11 is provided between the pressing plate 12 and the organic resin film 3.
Is provided as a cushion material for uniformly pressing the organic resin film 3 to obtain the organic resin film 3 and the adhesive resin layer having a uniform thickness. This mesh 1
1 is a wire diameter of 20 to 200 μm and a density of 20 to 200
A mesh made of organic fibers having a thickness of 30/350 μm per inch and a thickness of 30 to 350 μm is preferable. The wire diameter of this mesh 11 is 200 μm
When the mesh exceeds 200, the density exceeds 200 lines / inch, or the mesh exceeds 350 μm, the trace of the mesh is undesirably reflected on the organic resin film 3.
With a mesh having a wire diameter of less than 20 μm, a density of less than 20 wires / inch, or a thickness of less than 30 μm, the above effects provided by the mesh cannot be reliably obtained.

The pressing plate 12 is not particularly limited as long as it has excellent surface smoothness and can withstand the heating and pressing conditions at the time of bonding.
A glass plate having a thickness similar to that of the glass plate 1 to which is bonded is used.

The material of the surrounding frame 14 may be any as long as it can withstand the heating conditions at the time of bonding and can surround the side surface of the laminate with good adhesion.
Although there is no particular limitation, stainless steel or the like is generally employed.

As shown in FIG. 2, the surrounding frame 14 is preferably assembled so that the frame members 14A, 14B, 14C, and 14D can be moved relative to each other, and can cope with a laminate having different dimensions. .

In the present invention, the glass plate 1 and the organic resin film 3 are temporarily bonded by heating and pressurizing the laminate 13 in a vacuum bag as described below, and then the laminate 13 is taken out from the bag and further removed. The bonding may be performed in a two-stage bonding process in which the bonding resin is cross-linked and cured by heating.

That is, first, the adhesive resin film 2 is interposed between the glass plate 1 and the organic resin film 3 to laminate them, and the pressing plate 12 is further placed on the organic resin film 3 via the mesh 11. The laminated body 13 is stacked, and the laminated body 13 is accommodated in a non-breathable bag such as a rubber bag, and the inside of the bag is evacuated and heated to heat the glass plate 1.
And the organic resin film 3 are bonded (temporarily bonded). The temporary bonding conditions vary depending on the type of the adhesive resin film 2 to be used.
It is preferable to set the temperature at 00 ° C. for about 5 to 45 minutes.

After the temporary bonding in this manner, the glass sheet 1 is removed from the rubber bag, the mesh 11 and the pressing plate 12 are removed, and the temporary bonded body is heated in an oven or the like to cross-link and cure the adhesive resin, and the glass plate 1 and the organic resin are bonded together. The resin film 3 and the resin film 3 are firmly integrated by an adhesive resin. The conditions for the heat crosslinking are usually at 100 to 150 ° C. for about 20 to 50 minutes.

The method of manufacturing the film-reinforced glass of the present invention is applied to a window glass and a window of an opening / closing door for passengers, such as a glazed glass, a side glass and a rear glass of an automobile, a railway vehicle, for example, an ordinary vehicle, an express vehicle, an express vehicle, and a sleeper vehicle. It is suitable for the production of glass and indoor door glass, window glass and indoor door glass in buildings such as buildings, and film-reinforced glass such as showcases for indoor exhibitions and show windows.

[0056]

The present invention will be described more specifically with reference to the following examples and comparative examples.

In the following, the following were used as the glass plate, the organic resin film, the adhesive resin film, the mesh, the pressing plate, and the surrounding frame. Glass plate: 665 mm × 1172 mm × thickness 3 mm glass plate Organic resin film: PET resin film having a thickness of 188 μm Adhesive resin film: 40 EVA resin compositions having the following composition
EVA resin composition blending (parts by weight) EVA resin (vinyl acetate content 26% by weight): 100 Crosslinker (1,1-bis (t-butylperoxy) 3,3,5) -Trimethylcyclohexane): 2.0 Silane coupling agent (γ-methacryloxypropyl trimethoxysilane): 0.5 Crosslinking aid (triallyl isocyanurate): 2.0 Ultraviolet adsorbent (2-hydroxy-4-octyl) Benzophenone): 0.15 Mesh: Tetron (registered trademark) mesh (tetron monofilament yarn having a wire diameter of 69 μm, density (length and width) 100 / inch, thickness (gauge) 125 μm, 1
(00 mesh) Pressing plate: a glass plate having the same dimensions as the above glass plate Enclosure frame: a stainless steel rod having a thickness of 4 mm and a width of 10 mm formed in a frame shape.

Example 1 The above-mentioned EVA resin film and PET resin film were laminated on a glass plate, a pressing plate was further laminated via a mesh, an enclosing frame was attached to the laminated body, and this was put in a rubber bag and vacuumed. It was degassed and pre-pressed at a temperature of 100 ° C. Next, the pre-pressed glass was taken out of the rubber bag, the mesh and the pressing plate were removed, placed in an oven, and subjected to a pressure treatment at a temperature of 150 ° C. for 30 minutes to produce a film-reinforced glass.

Observation of the surface and side surfaces of the film-reinforced glass revealed no irregularities or wrinkles in the shape of the surface, no protrusion of the adhesive resin, and very high quality. .

[0060]

As described above in detail, according to the method for producing a film-reinforced glass of the present invention, after laminating these between a glass plate and an organic resin film via an adhesive resin layer,
In a method of manufacturing a film-reinforced glass by pressing and heating in the laminating direction and bonding by heating, a method of preventing unevenness of the surface of the organic resin film from being generated due to pressure and having excellent smoothness of the organic resin film surface. Quality film-reinforced glass can be produced.

According to the method of claim 2, furthermore, it is possible to prevent the adhesive resin from protruding from the side end surface in the heating and pressing step and to prevent the pressure from being imbalanced at the side edges, so that high-quality film-reinforced glass can be obtained. Can be manufactured.

According to the third aspect, the heating and pressurizing can be performed efficiently.

According to the fourth aspect, a film reinforced glass having high adhesive strength between the glass plate and the organic resin film and excellent durability is provided.

According to the fifth aspect, a high-strength film-reinforced glass is provided by an organic resin film having an excellent reinforcing effect on a glass plate.

According to the sixth aspect, a high-quality film-reinforced glass can be manufactured with good workability.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a method for producing a film-reinforced glass of the present invention, wherein FIGS. 1 (a) and 1 (b) are cross-sectional views, and FIG. 1 (c) is a plan view.

FIG. 2 is a plan view showing an embodiment of an enclosure used in the present invention.

FIGS. 3A to 3C are views showing a conventional method, and FIGS.
3D is a sectional view, FIG. 3D is an enlarged view of a portion D in FIG. 3C, FIG. 3E is an enlarged view of an E portion in FIG. 3C, and FIG. 3F is a perspective view. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass plate 2 Adhesive resin film 3 Organic resin film 4 Laminated body 5 Bag 11 Mesh 12 Pressing plate 13 Laminated body 14 Enclosure frame

Continued on the front page F-term (reference) 4F100 AG00A AK01C AK25 AK41C AK68 AT00C BA03 BA07 BA10A BA10C CB02B EC18 EJ17 EJ42 GB90 JK15 4F211 AA21 AA24 AD04 AG03 TA03 TC01 TJ23 TN07 TN44 TQ01 GA11A

Claims (6)

[Claims] 1. After laminating a glass plate and an organic resin film with an adhesive resin layer between them, the glass plate and the organic resin film are bonded and integrated by applying pressure and heating in the laminating direction. In the method for producing a film-reinforced glass having a heating and pressing step, a pressing plate is further laminated via a mesh on the organic resin film laminated on the glass plate, and the pressing is performed via the pressing plate. And removing the mesh and the pressing plate after the heating and pressurizing step. 2. The method for manufacturing a film-reinforced glass according to claim 1, wherein an enclosing frame surrounding four side surfaces of the laminated body is arranged to perform the heating and pressurizing step. 3. The laminate according to claim 1, wherein in the heating and pressurizing step, the laminate is housed in an air-impermeable bag, and the laminate is evacuated from the bag to press the laminate in the laminating direction. And a method for producing a film-reinforced glass, wherein the laminate is heated. 4. The method according to claim 1, wherein the adhesive resin is an EVA resin. 5. The method according to claim 1, wherein the organic resin film is a PET resin film. 6. The mesh according to claim 1, wherein the mesh has a wire diameter of 20 to 200 μm and a density of 20 to 2 μm.
A method for producing a film-reinforced glass, which is an organic fiber mesh having a thickness of 00 / inch and a thickness of 30 to 350 μm.