JPS59146838A - Manufacture of laminated glass - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing laminated glass, particularly heat ray reflective laminated glass.

As a conventional method for manufacturing this type of laminated glass, for example, first, a resin film of polyethylene terephthalate, nylon-6, etc.
At least one metal or metal oxide selected from, for example, gold, silver, TiO2, tungsten oxide, etc., is deposited by a continuous vacuum evaporation method or a continuous sputtering method while continuously feeding a film in a vacuum chamber (H). is continuously deposited to create a heat ray reflective film, then this film is wound up in a tank and cut into a predetermined size when used, preferably with a water content of 1.0 to 1.・After controlling the humidity of the sea urchin in the 5th weight section, insert it between two sheets of film adhesive, and then overlap two sheets of inorganic glass or organic glass on the outer surface of the film adhesive, and then heat-compress it. There is a method for producing laminated glass. Figure 1a shows laminated glass manufactured by a conventional method. Figure 1a is a plan view of the laminated glass, and arrow T indicates the stretching direction of the resin film in the width direction (TD);
Arrow M indicates the stretching direction in the longitudinal direction (MD), and FIG. 1 shows a cross section of the laminated glass, l indicates inorganic glass,
2 is an adhesive, and 8 is a heat ray reflective resin film.

In this conventional method for manufacturing laminated glass, the heat ray reflective film to which metal or gold 1j14 oxide is attached is laminated so that the stretching direction of the film coincides with the peripheral direction of the glass, as shown in Figure 1a. Because it is turned upside down,
When the laminated glass is kept in a high humidity environment for a long period of time, the resin film absorbs moisture and swells, causing large wrinkles to appear in the resin film, which is visually undesirable. Furthermore, even if the end surfaces of the laminated glass were coated with a sealant having excellent moisture permeability such as vinyl acetate, ebogishi, butyl rubber, etc., it was impossible to completely suppress wrinkles.

The inventors of the present invention conducted extensive research to solve the problem of acid spots in the conventional method.
A strip-shaped sample with a width of I Q rnm and a length of 5 Q Q mm was cut out from a heat ray reflective film in which gold and silver were fully vapor-deposited on a μm nylon-6 film in the stretching direction at an angle θ with respect to the width direction (TD), and placed in a desiccator. After being stored for 8 days at
After holding for 4 hours, the coefficient of linear expansion was determined from the increase in length, as shown in Figure 8. Wrinkles in the heat ray reflective film after lamination occur due to the film absorbing moisture and stretching, and the coefficient of linear expansion of the 8th patterned filt is as follows: The angle (product I - angle) θ with respect to TD is 10°≦θ≦45 Since the film decreases rapidly in the range of
If the angle θ formed between the length direction (Ml), width direction (TD)) and the glass periphery is 100≦θ≦45°, the occurrence of wrinkles after molding can be significantly reduced. We have confirmed that if the edges of laminated glass are sealed with a sealant with excellent moisture permeability such as vinyl acetate, ebony/butyl rubber, etc., it is possible to obtain a product that is completely wrinkle-free.

Therefore, a resin film to which at least one metal or metal oxide selected from the group consisting of metals and metal oxides is attached is sandwiched between two sheets of inorganic glass or organic glass via an adhesive layer. The laminated glass of the present invention is laminated in such a manner that the angle between the stretching direction of the resin film and the glass periphery, that is, the laminated corner layer θ is 10°≦θ≦45°.
It is characterized in that the resin film Rosewood 111 is made as follows.

Figure 2 a shows a laminated glass manufactured by the method of the present invention. Figure 2 a is a plan view of the laminated glass, and arrow T indicates the width direction (TD) of the resin film. Stretching direction, arrow M indicates the stretching direction in the length direction (MD),
The angle between these stretching directions and the glass peripheral direction is indicated by θ.

In addition, FIG. 2b shows a cross section of the laminated glass, and the conventional laminated glass shown in FIG. The difference is that a heat ray reflective film made of a resin film to which a metal or metal oxide is attached is used.

As described above, according to the method of the present invention, the resin film, that is, the heat ray reflective film, is laminated so that the angle θ between the resin film and the glass periphery in the stretching direction is 10° (θ≦45°). The wrinkles that occur are reduced,
By sealing the edges of laminated glass using the above-mentioned sealing agent such as hot melt butyl rubber, it is possible to obtain a highly durable violet laminated glass without any wrinkles.

Angle θ between the stretching direction of the film and the periphery of the glass
It goes without saying that setting τ4·5° and θ≦90° is essentially the same as setting 0°≦θ<45° in a rectangular laminated glass.

Next, the present invention will be explained based on Examples and Comparative Examples.

Examples 1 to 5 A nylon-6 film with a width of 500 mm and a thickness of 37 μm was deposited in a vapor deposition apparatus at a film speed of 2.0 m/se.
c, degree of vacuum i x 1o mmHy (Torr)
0.018 to 0.02797m” respectively for gold and silver,
A heat ray reflective film was prepared by vapor deposition at a rate of 0.045 to 0.0783 g to a thickness of 200 g. In order to prevent the generation of wrinkles during lamination molding, the heat ray reflective film was kept in contact with an atmosphere of 20° C. and 95% RH for 24 hours. When the water absorption rate of the film in this case was measured, it was 2.9 to 8.8% by weight. Inorganic glass (thickness 2.0mm) immediately after water absorption measurement
/ Polyvinyl butyral as adhesive layer (thickness 0, 7
6 mm )/humidity-controlled heat ray reflective film/polyvinyl butyral as adhesive layer (thickness Q, 36 mm
)/inorganic glass (thickness: 2°Qm711).

In this case, the lamination angles between the stretching direction of the heat ray reflective film and the periphery of the glass were 10°, 15°, 20°, 80°, and 45°. After vacuum degassing these five types of laminates, the hot water temperature was 120°C, the pressure was IZ, and 5i<97c.
The heat-reflective laminated glasses A to E' having the l* layer pattern shown in FIG. These heat-reflecting laminated glasses were stored in an atmosphere of 50°C and 95% RH, and after 350 hours, the nylon-6 glass was held between medium heat.
:j(-Length k of the wrinkles generated in the heat ray reflective film used as the base material from the edge of the glass 1lJll) and the lamination angle θ
and are shown in Table 1.

Comparative Examples 1 to B Example 1 except that the stacking angle θ was 0°, 5°, and 8°.
Similar to ~5, heat ray reflective laminated glass F, G and H
It was created. These laminated glasses fur degree 0℃, 95
RHL:/) Maintained in atmosphere, and after 850 hours, the product was 1
@Measure the length from the edge of the glass of the wrinkles that occurred on the heat ray reflective film based on nylon-6 held in the center of the glass, and add it to Table 6 along with the product j - angle θ. .

The results of Table 1 are illustrated in FIG. 4, and it is clear that the length of wrinkles that occur decreases rapidly when the lamination angle θ is in the range of ]0°≦θ≦45°.

Table 1: Five types of heat-reflective laminated glasses A to M were prepared in exactly the same manner as in Examples 1 to 5, and hot melt butyl rubber with truncated edges (
It was sealed with a thickness of 1.5 mm). These laminated glasses are manufactured under the following conditions: 80℃/4hr-+room temperature 10.5hr-+-40℃
/], 5 hr − + room temperature 10.5 hr − + 70°C,
95 RH/8 hr→room temperature/Q, 5hr→-4
0°C/], 5 hr -> room temperature 10.5 hr A thermal cycle test was carried out for up to 4 cycles,
The length of the wrinkles after 4 cycles was measured, and the obtained results are shown in Table 2 along with the lamination angle θ.Comparative Examples 4 to 6 Eight types of heat ray reflective laminated glass N, The glass laminated glasses were subjected to the same thermal cycle test as in Examples 6 to 10, and the results after 4 cycles were The results of the wrinkle length measurement are also listed in Table 2 along with the lamination angle θ.From these results, the laminated glasses 1 to M of Examples 6 to 10 are different from those of Comparative Examples 4 to 10.
It is clear that no wrinkles were generated compared to the product of 6)-glass NP.

Table 2

[Brief explanation of drawings]

Figure 1a is a plan view of the laminated glass manufactured by the conventional method; Figure 1 is a cross-sectional view of the laminated glass shown in Figure 1;
Figure a is a plan view of the laminated glass manufactured by the method of the present invention, Figure 2 is a cross-sectional view of the laminated glass shown in 2Na, and Figure 8 is a graph showing the angular dependence of the coefficient of linear expansion of the resin film. , FIG. 4 is a graph showing the relationship between the lamination angle θ of resin films and the degree of wrinkle occurrence. 1... Inorganic glass, 2... Adhesive layer, 8...
・Resin film for laminated glass by conventional method, 4...
A resin film for laminated glass produced by the method of the present invention. Patent Applicant Nissan Motor Co., Ltd. Figure 1 Part 1〈SLF! f

Claims (1)

[Claims] L A resin film to which at least one metal or metal oxide selected from the group consisting of metals and metal oxides is attached is sandwiched between two pieces of inorganic glass or organic glass via an adhesive layer. A method for producing a laminated glass in which the resin films are laminated so that the angle (θ) between the stretching direction of the resin film and the periphery of the glass satisfies 10°≦θ≦45°. Production method.