JPH08225346A - Frost-like laminated glass - Google Patents

Abstract

PURPOSE: To obtain a frost-like laminated glass having excellent strength, readily maintainable and without requiring to designate as indoor side or outdoor side in using by adopting a specific condition in a laminated glass having a prescribed construction. CONSTITUTION: This laminated glass is constructed by sandwiching at least one sheet of frost-processed synthetic resin film 3 formed unevenness on the surface, preferably made of a polycarbonate film, between at least two pieces of intermediate membrane 4 and 5 made of a synthetic resin (e.g. ethylene vinyl acetate copolymer) having a heat-distortion temperature lower than the frost-processed synthetic resin film 3 so as to be brought into contact with the surface of the frost-processed synthetic resin film 3, further laminating glass plates 1 and 2 on both outsides of the intermediate membranes and adhering. In the laminated glass, refractive index of the frost-processed synthetic resin film 3 is differentiated from refractive index of the synthetic resin intermediate membranes 4 and 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated glass used for a building, particularly as a partitioning material for the building.

[0002]

2. Description of the Related Art Conventionally, a glass plate having an effect of adding a light diffusing property and a design property by giving a frosted feeling to the surface of glass has been conventionally used as a partitioning material for a building such as a window. Has been proposed. For example, such a light diffusing property can be imparted to the glass plate by subjecting the surface of the glass plate to frosting or by pasting a frosted film on the surface of the glass plate.

However, as described above, the frosted surface of the glass plate or the frosted plastic film adhered to the glass plate surface causes the frosted surface to be dirty and the durability of the film-bonded surface. When using these for the opening of the outer wall of the building or the partition between the outdoor and the indoor due to problems of maintenance and maintenance, adhesion of frosted surface of glass plate or frosted plastic It was necessary to use the laminated surface facing the indoor side.

Therefore, when shipping a front door or a sash, a glass plate is incorporated in the factory, so that the designation of indoor and outdoor should not be mistaken so as not to be incorporated in the front door or sash. It was troublesome because it required time and effort and checks.

Further, the method of adhering a frosted plastic film to a plate glass has problems of scratch resistance of the film, adhesive strength to glass and light resistance, so that it can be applied to a building such as a house or a building which has a long period of use. Was not suitable for use.

Therefore, it has been considered to use laminated glass with the uneven surface of the frosted glass on the intermediate film side of the laminated glass, but the intermediate film fits in the uneven portion and the unevenness disappears, and the expected effect is obtained. Was not obtained.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems of the prior art and to provide a new frosted glass having a sufficient frost feeling.

[0008]

DISCLOSURE OF THE INVENTION According to the present invention, at least one frosted synthetic resin film having irregularities formed on its surface is provided with at least two frosted synthetic resin films having a heat distortion temperature lower than that of the frosted synthetic resin film. A synthetic glass intermediate film, which is sandwiched so as to be in contact with the surface of the frosted synthetic resin film, and further laminated and adhered with glass plates on both outer sides thereof, which is a laminated glass,
A frosted laminated glass in which the refractive index of the frosted synthetic resin film and the refractive index of the synthetic resin intermediate film are different.

Incidentally, the synthetic resin intermediate film mentioned here means a thermoplastic resin film or a thermosetting resin film which is previously formed into a sheet shape at the time of manufacturing the frosted glass, which will be described in detail later.

The present invention also provides the above frosted laminated glass in which the frosted synthetic resin film having a higher heat distortion temperature than the synthetic resin intermediate film is a polycarbonate film.

In the present invention, two glass plates and a frosted synthetic resin film having an uneven surface are used as a synthetic resin intermediate film (for example, a thermoplastic synthetic resin intermediate film or a thermosetting synthetic resin). Using an intermediate film), they are laminated by thermocompression bonding using, for example, an autoclave. In order to prevent the uneven surface of the synthetic resin film having the uneven surface from being softened and crushed by the heating in the laminating process of laminating by thermocompression bonding, the thermal deformation of the synthetic resin film having the uneven surface is A material whose temperature is higher than the heat distortion temperature of the synthetic resin interlayer film is used.

For example, when a synthetic resin interlayer film made of a thermoplastic synthetic resin such as ethylene / vinyl acetate copolymer, polyurethane or polyvinyl butyral or a thermosetting synthetic resin is used as the frosted synthetic resin film, Since a heat treatment at a predetermined temperature is required in the combining process, a synthetic resin such as polycarbonate or polyethylene terephthalate having a heat distortion temperature higher than those of these synthetic resin intermediate films is suitable.

Further, according to the present invention, glass plates are laminated on both sides of at least one frosted synthetic resin film having irregularities formed on the surface thereof with an adhesive made of a synthetic resin, adhered and cured. A laminated frosted glass having the frosted synthetic resin film and the synthetic resin adhesive having different refractive indexes.

The synthetic resin adhesive referred to here is a liquid synthetic resin adhesive when the frosted laminated glass is manufactured, and is hardened when the frosted laminated glass is completed. A material that becomes an adhesive layer made of synthetic resin.

A photocurable or low temperature heat-curable adhesive synthetic resin liquid film comprising an acrylic photopolymerizable prepolymer, an acrylic catalyst polymerizable prepolymer, an acrylic ester / vinyl acetate photopolymerizable prepolymer, or the like. When a liquid adhesive is used, the curing process is performed by irradiation with light and no heat treatment is necessary, or a heat treatment at a low temperature is sufficient, so that the frosted synthetic resin film has a low heat distortion temperature. Processed synthetic resin films, such as polyvinyl chloride frosted synthetic resin films, can also be used.

In the frosted laminated glass, FIG. 1 and FIG.
, The synthetic resin intermediate layer having a lower refractive index than the frosted synthetic resin film 3 and a thermal deformation temperature lower than that of the frosted synthetic resin film laminated in contact with the surface of the frosted synthetic resin film 3. Membrane 4, 5
Since the refractive index is different from that of (1), transmitted light is scattered and a frost feeling is obtained due to the effect of unevenness of the frosted synthetic resin film formed on both sides.

This is because the refractive index of the frosted synthetic resin film having unevenness on the surface is different from that of the synthetic resin intermediate film, and therefore the refractive index is different on both sides of the adhesive interface. This is because, for the same reason that the light transmitted from the processed synthetic resin film to the air layer having a different refractive index is diffused, the effect of scattering the transmitted light is not lost even at this interface.

It is preferable that the unevenness is formed on the surface of the synthetic resin film such as polycarbonate when the film is formed because the manufacturing cost is reduced. The unevenness is formed on the surface of the synthetic resin film by processing one surface or both surfaces of the film so as to obtain unevenness to the extent that diffusion of transmitted light is obtained.

The synthetic resin intermediate film having a lower heat distortion temperature than the frosted synthetic resin film having an uneven surface used in the present invention is a thermoplastic resin such as ethylene / vinyl acetate copolymer, polyurethane or polyvinyl butyral. An acrylic photopolymerization prepolymer, an acrylic catalyst polymerization prepolymer, an acrylic acid ester / vinyl acetate photopolymerization prepolymer, or the like can be used as an adhesive for resins, thermosetting resins, and synthetic resins.

As the glass plate, a glass plate by the float method, tempered glass, heat ray absorbing glass, heat ray reflecting glass and the like can be used. Further, the frosted laminated glass of the present invention can be used to form a multilayer glass.

In order to maintain the effect of diffusing the transmitted light of the frosted synthetic resin film, the difference in refractive index between the frosted synthetic resin film and the synthetic resin intermediate film is
0.02 or more, preferably 0.04 or more.

[0022]

EXAMPLE FIG. 1 is a cross-sectional view of a frosted laminated glass of the present invention. Reference numerals 1 and 2 are glass plates constituting both outer surfaces of the laminated glass, and 4 and 5 are arranged inside the glass plate and bonded. Synthetic resin intermediate film made of ethylene-vinyl acetate copolymer with function (heat distortion temperature about 80 ° C, refractive index about 1.49)
3 is a frosted synthetic resin film (polycarbonate having a softening temperature of about 135 ° C., which is made of polycarbonate with fine uneven surfaces formed on both sides so that a frosted tone is obtained by light scattering.
The refractive index is about 1.59).

The glass plates 1 and 2 and the frosted synthetic resin film are laminated via the synthetic resin intermediate film and are thermocompression bonded to be bonded and integrated. The laminated glass thus constructed does not lose the unevenness formed on both sides of the polycarbonate film by crushing and disappearing even in the vacuum pressure bonding method using a rubber bag or the nipper roll / autoclave pressure bonding method, and maintains the frosted tone of the polycarbonate film. Has been done.

Further, as the synthetic resin intermediate films 4 and 5, they were laminated with a synthetic resin intermediate film made of polyurethane interposed therebetween and subjected to thermocompression bonding by the same production method as above, but an equivalent frosted laminated glass was obtained.

FIG. 2 is also a sectional view of the frosted laminated glass of the present invention. In this embodiment, unlike the embodiment shown in FIG. 1, a frosted synthetic resin film layer 3 having concavities and convexities formed on one surface is used.

The synthetic resin intermediate films 4 and 5 include bronze, gray, green, blue, in addition to colorless and transparent ones.
Those colored with milky white or the like can also be used according to the application.

[0027]

EFFECTS OF THE INVENTION According to the present invention, since the glass plate surface is not subjected to a frosting process or a film bonding process as in the prior art, maintenance is easy and the indoor side / outdoor side is designated for use. No need.

Further, the frosted synthetic resin film having irregularities formed on the surface is sandwiched between synthetic resin intermediate films having a lower softening temperature, and the temperature of the laminating process is set to be lower than the softening temperature of the synthetic resin intermediate film. Since it is high and it can be set to a temperature at which the frosted synthetic resin film does not thermally deform, unevenness is not crushed and disappears when laminating the laminated glass,
The frost feeling is maintained by the transmitted light scattering due to the effect of the unevenness, and the glass plate and each film are sufficiently adhered, so that the place of use is not limited by the problem of adhesion between the glass plate and each film.

Further, the frosted laminated glass of the present invention is a laminated glass in which a frosted synthetic resin film is sandwiched between two synthetic resin intermediate films, and glass plates are adhered to both outer surfaces of the synthetic resin film. Compared to the case of frosting the glass plate or attaching a frosted film, the strength is greater, and the lighting,
Not only suitable for dimming, but also excellent in design, it can also be used as a partition material for decoration.

[Brief description of drawings]

FIG. 1 is a sectional view of a frosted laminated glass of the present invention.

FIG. 2 is a sectional view of a frosted laminated glass of the present invention.

[Explanation of symbols]

 1, 2: Glass plate 3: Frosted synthetic resin film 4, 5: Synthetic resin intermediate film

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Claims (3)

[Claims] 1. At least one surface having irregularities.
The frosted synthetic resin film is sandwiched between at least two synthetic resin intermediate films having a heat distortion temperature lower than that of the frosted synthetic resin film so as to be in contact with the surface of the frosted synthetic resin film, A frosted laminated glass obtained by laminating and adhering glass plates on both outer sides thereof, wherein the refractive index of the frosted synthetic resin film is different from that of the synthetic resin intermediate film. 2. The frosted laminated glass according to claim 1, wherein the frosted synthetic resin film having a heat distortion temperature higher than that of the synthetic resin intermediate film is a polycarbonate film. 3. At least one having an uneven surface.
A laminated glass obtained by laminating glass plates on both sides of a frosted synthetic resin film with a synthetic resin adhesive interposed therebetween, and adhering and curing the laminated glass. The refractive index of the frosted synthetic resin film and the synthetic glass A frosted laminated glass that has a different refractive index from the resin adhesive.