JPS6252149A - Safety glass containing heat-radiation reflecting film - Google Patents

Abstract

PURPOSE:To set a heat-radiation reflecting film between joining faces of safety glass so as not to make wrinkles, by laying the heat-radiation film between the joining face of either glass plate of two glass plates and a joining intermediate film. CONSTITUTION:The joining intermediate film 2 and the heat-radiation reflecting film 3 are laid between the glass plates 1, to form safety glass. In this case, the lamination relation of the heat-radiation film 4 is allowed if it is set between the joining face of either plate of the glass plates 1 and either face of the joining intermediate film 3. The heat-radiation reflecting film 3 consists of a film base material and a metal or metallic oxide applied to it. On the other hand, a resin film of EVA type consisting of ethylene-vinyl acetate copolymer, etc., is preferable as the intermediate film laid between the glass plates 1 and laminated from the viewpoint of water vapor resistance, etc.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a laminated glass with a heat ray reflective film suitable for reflecting heat rays in sunlight and preventing their transmission, thereby preventing temperature rise in internal space. .

[Prior Art] Normally, when sunlight enters a closed space 1 separated from the outside by a glass plate, such as the inside of a car or the interior of a building, not only visible light but also infrared rays, which are heat rays, are emitted. It can pass through the glass plate, causing a rise in temperature within the space.Especially in cars that drive on roads that are not necessarily flat, windshields and glass are installed at a certain angle. ,
There are many opportunities for sunlight to shine directly into the inside of a car, and in order to prevent the temperature inside the car from rising, there has been a need for a way to prevent heat rays from penetrating inside the car.

In order to meet these demands, attempts have already been made to interpose a heat ray reflective film on the mating surfaces of laminated glass and use this heat ray reflective film to block the transmission of heat rays. This figure shows the cross-sectional structure of a conventional laminated glass containing an M-ray reflective film. This is composed of two laminated interlayer films made of resin films such as polyvinyl butyral or polyurethane that are interposed between the lath plates 11 and 11, and the heat rays are reflected between the laminated intermediate sheets [12 and 12]. A laminated glass with a heat ray reflective film is formed by sandwiching the film 13.

[Problems to be Solved by the Invention] Even with such conventional technology, transmission of heat rays can be prevented because a heat ray reflective film is interposed.

However, the laminated interlayer film used was a resin film made of soft polyvinyl butyral or polyurethane, and the structure was such that the heat ray reflective film was sandwiched between the soft interlayer film from both sides. It was not possible to clamp the heat ray reflective film firmly against the surface. For this reason, especially in deeply bent laminated glass, uneven wrinkles tend to form on the surface of the heat ray reflective film located on the curved surface, so it is necessary to spread the laminated interlayer film between each other to prevent wrinkles from forming. There were difficulties. When using such laminated glass with a heat ray reflective film interposed with a wrinkled heat ray reflective film, the light rays are diffusely reflected and the presence of the wrinkles is further emphasized, which is not only an eyesore, but also deteriorates the optical properties. The following disadvantages have been pointed out, and improvements have been desired.

An object of the present invention is to solve such problems of the conventional examples and to provide a laminated glass containing a heat ray reflective film in which a heat ray reflective film is provided on the mating surfaces of the laminated glass so that wrinkles do not occur. .

[Means for Solving the Problems] In order to achieve this object, the present invention was constructed as follows.

That is, the present invention provides a laminated glass with a heat ray reflective film in which a heat ray reflective film is interposed between two glass plates. Provided between the membrane
j has its structural features.

[Function] Therefore, the heat ray reflective film can be brought into direct contact with one of the mating surfaces of the glass plates forming the hard surface. For this reason, the heat ray reflective film can be provided with its side surface closely attached to the glass surface, and it has become possible to easily provide it on the mating surfaces of the laminated glass without wrinkles.

[Example] Hereinafter, the present invention will be explained in detail based on the drawings.

FIG. 1 shows an example of the cross-sectional structure of a laminated glass with a heat ray reflective film according to the present invention, and shows a glass plate 1.
1. Between each other, there is a laminating interlayer film 2 and an M-ray reflective film 3.
A laminated glass is formed by interposing and laminating these.

In this case, the vXX amount of the heat ray reflective film 4 may be such that it is located between any one of the mating surfaces of the glass plate 1.1 and any one of the mating surfaces of the mating film 3.

In the present invention, the heat ray reflective film 3 interposed and laminated to reflect heat rays such as infrared rays is composed of a film base material and a metal or metal oxide coated on the film base material. Among these, it is desirable that the film substrate has high transparency, excellent smoothness, good optical properties, and high chemical durability, and in particular, exhibits excellent properties in terms of toughness and heat resistance. Two-wheel oriented polyester films and two-wheel oriented nylon films are preferred. Among them, biaxially oriented polyester films are highly transparent, have no clouding, have little optical distortion, have appropriate toughness, and are easy to bond to glass plates. It is optimal because it can withstand temperatures of 100 to 150°C. In addition, when forming a metal layer for heat ray reflection on a film base material, Ag, Au, AI, Gr,
Of course, it may be a single layer made of Cu, Ni-Gr alloy, stainless steel, etc., but it is more preferable to use a dielectric layer such as Tio2/Ag/Ti02 between the first and third layers. It is desirable to have a three-layer structure in which the second layer sandwiched between these two layers is formed as a metal layer.When creating a three-layer structure in this way, it is possible not only to improve weather resistance but also to improve visible light reflection. It is also possible to prevent reflected light pollution by reducing the visible light transmittance and further increasing the visible light transmittance, and it can be suitably used as window glass for automobiles and buildings.

On the other hand, as the laminated interlayer film 2 interposed and laminated between the glass plates 1 and 1, a resin film such as polyvinyl butyral or polyurethane is used, but from the viewpoint of moisture resistance etc., ethylene-vinyl acetate is used. EVA made of copolymers etc.
A type of resin film is more suitable.

That is, for the EVA-based laminated interlayer film 2, a photocurable resin composition made of an ethylene-vinyl acetate copolymer mixed with a thermosetting agent such as peroxide or a photosensitizer is formed. This is what happens. This EVA-based laminated interlayer film 2 is interposed between the glass plate 1 and the heat ray reflective film 3, and is bonded together by applying heat or light, and if necessary, applying pressure. It was designed to do so. The amount of vinyl acetate in the ethylene-vinyl acetate copolymer is preferably 10 to 50% by weight, more preferably 15 to 4 oz. When the amount of vinyl acetate is less than the above-mentioned loz, transparency deteriorates, making it unsuitable for use as a laminated interlayer film for automobile rear glass, etc., which requires transparency. Furthermore, when the amount of vinyl acetate is greater than the above-mentioned 5 oz, the breaking strength becomes low and the elongation becomes 1000% or more, making it difficult to form a laminated intermediate film, which is not preferable.

The appropriate proportion of the thermosetting agent or photosensitizer added to the ethylene-vinyl acetate copolymer is 0.2 to 5 parts by weight per 100 parts by weight of the ethylene-vinyl acetate copolymer. . In such a case, the thermosetting agent is about 8
Any material can be used as long as it decomposes to produce radicals at a temperature of 0° C. or higher. Specific examples of thermosetting agents include ketone peroxides such as methyl 2,000 peroxide and cyclohexanone peroxide, hydroperoxides such as t-butyl peroxide and cumene hydroperoxide, and -t-butyl peroxide, dialkyl peroxides such as ethyl-3,3-di(t-butylperoxy)butyrate,
Organic peroxides such as diacyl peroxides such as acetyl peroxide and propionyl peroxide, and peroxy esters such as t-butyl peroxyacetate and t-butyl peroxyisobutyrate are used.

In addition, any photosensitizer may be used as long as it generates radicals directly or indirectly when irradiated with light, and examples thereof include benzoin, benzophenone, benzoin methyl ether, benzoin ethyl ether, and benzoin ethyl ether. Inpropyl ether, benzoin isobutyl ether, dibenzodyl, 5-nitroacetonaphthene, hexachlorocyclopentadiene, paranitrodiphenyl, varanitroaniline.

2.4.8-Trinitroaniline, 1,2-benzoanthraquinone, 3-methyl-1,3diazo-1,9-penthanthrone, etc. are used.

Furthermore, in the present invention, the ethylene-vinyl acetate copolymer used for the EVA-based laminated interlayer film has a #penetrating property that improves its initial modulus and prevents the object from penetrating when the object collides with it. An acryloxy group- or methacryloxy group-containing compound can be added to increase the . The most common compounds serving this purpose are acrylic or methacrylic acid derivatives, such as esters and amides. Moreover, a plasticizer, an anti-aging agent, an ultraviolet absorber, a crosslinking aid, a coloring agent, etc. can also be added to the ethylene-vinyl acetate copolymer as appropriate depending on the purpose.

Moreover, when adhering the heat ray reflective film 3 to the mating surface of either one of the glass plates 1, a silane coupling treatment is performed. Coupling agents used in this case include γ-gloropropyltrimethoxysilane, vinyl(l)chlorosilane, vinyltriethoxysilane,
Vinyl-tris-(β-methoxyethoxy)silane, γ
-methacryloxypropylmethoxysilane, β-(3,
4-Eboxycyclohexyl)ethyl-trimethoxysilane, γ-glycidopropyltrimethoxysilane, vinyltriacetoxysilane, γ-mercaptopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, etc. are used. Such a silane coupling agent may be applied to the glass plate 1 and the EVA-based interlayer film 2 as needed.
It can be used on any joint surface to improve mutual adhesion.

In the present invention, the glass plate 1.1 may be a flat plate, or may be formed by shallow bending or deep bending. It may be partially or entirely formed with a colored film, etc., or it may be ffl with various processing such as decorative processing.Since the present invention is configured in this way, When interposing and laminating the heat ray reflective film 3 between the mating surface of either one of the glass plates 1.1 and the mating interlayer film 2, the heat ray reflective film 3 is attached to the mating surface of the glass plate 1 using a silane coupling agent. In this case, the mating surface of the glass plate 1, which is the bonding surface of the heat ray reflective film 3, forms a hard smooth surface, so the heat ray reflective film 3 is attached along with this smooth surface.
By spreading the material, it is possible to provide the material in close contact with each other without producing uneven wrinkles as in the conventional method.

Therefore, it can also be applied to deeply bent laminated glass, for which it has been technically difficult to provide a heat ray reflective film without causing wrinkles.

Further, when an EVA-based resin film is used as the laminated interlayer film 2, the moisture resistance can be significantly improved compared to a resin film such as polyvinyl butyral, and thus durability can be improved.

As described above, the heat ray reflective film-containing laminated glass according to the present invention not only can effectively prevent heat rays from passing into the interior space of a car interior, but also allows the heat ray reflective film to be installed without causing wrinkles. Therefore, it can be suitably used not only as window glass for various buildings, but also as windshields, side glasses, etc. of automobiles.

[Effect] As described above, according to the present invention, a heat ray reflective film that blocks the transmission of heat rays can be spread through the mating surfaces of either one of the glass plates constituting the laminated glass without causing wrinkles. Since it can be arranged in an extended manner, it can be suitably used as glass for various windows for reflecting heat rays, with consideration given to safety and aesthetics, as well as functionality and decoration.

[Brief explanation of the drawing]

In the drawings, FIG. 1 is a vertical cross-sectional view of an embodiment of the laminated glass with a heat ray reflective film according to the present invention, and FIG. 2 is a vertical cross-sectional view of a conventional example. 1. Glass plate; 2. Laminated interlayer film, No. 3 - Heat ray reflective film Fig. 1 Fig. 2

Claims (2)

[Claims] (1) In laminated glass with a heat ray reflective film in which a heat ray reflective film is interposed between two glass plates, the heat ray reflective film is placed between the mating surface of one of the glass plates and the laminated interlayer film. Laminated glass with a heat ray reflective film. (2) The laminated glass with a heat ray reflective film according to claim 1, wherein the laminated interlayer film is formed of an ethylene-vinyl acetate copolymer.