JPS5867451A - Manufacture of clad window - 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 laminated window, and particularly to a laminated window with a good appearance, in which a transparent film is interposed between two transparent plates! Regarding EK, it is also concerned with the manufacturing method of laminated windows that have new functions added to the film.

BACKGROUND OF THE INVENTION Laminated glass windows are used for transparent openings that require safety, such as windows of automobiles, trains, airplanes, etc., or some building windows. The basic structure of a laminated window is that a thermoplastic resin layer is sandwiched between transparent bodies such as glass plates, but a film is further interposed in order to impart further functionality to the laminated window. For example, a method of interposing a transparent film with excellent mechanical strength for a scattering adhesion effect;
A method has been proposed in which a transparent conductive film is interposed to prevent dew condensation, or a film is interposed which has a selective light transmission function by allowing visible light to pass through but blocking near infrared light. However, a laminated window with a film interposed therebetween with a good appearance could not be obtained unless the film thickness was about 130 μm or more.

Although the transparency of the laminated window is good, when looking at the reflection from the surface of the laminated window, the image Kl
It was not suitable for practical use because slight unevenness occurred and the image itself appeared distorted. On the other hand, there is generally a method of applying a thin film to the surface of the film in order to give it functionality, but this thin film processing is often done in a vacuum container, and from the viewpoint of processability and rawness. (Continuous production if folded) The thinner the film, the better.

Therefore, if a laminated window with a good appearance can be manufactured using a thin film suitable for the above-mentioned thin film processing, such as 25 μm thickness, it will be possible to obtain a laminated window with various functionalities.

As a result of intensive research into a manufacturing method that can achieve this objective, the present inventors found that when sequentially laminating a transparent plate, a thermoplastic resin layer, a film, a thermoplastic resin layer, and a transparent plate, the film is attached to the transparent plate. The present invention was achieved by discovering that a laminate with a good appearance can be obtained by fixing it around the periphery.

That is, the present invention relates to a transparent plate and a thermoplastic resin sheet.

A laminated window manufacturing method in which a film, a thermoplastic resin sheet, and a transparent plate are sequentially laminated, in which a small amount of film is fixed around at least one transparent plate. Relating to a manufacturing method.

By fixing the periphery of the film around the transparent plate,
The film itself becomes stretched, and when laminated with a thermoplastic resin, it becomes less susceptible to the effects of unevenness on the surface of the thermoplastic resin, resulting in a good appearance. In particular, in the case of curved glass, unlike flat glass, the film is further stretched and bonded, resulting in an even better appearance.

Also, it is more effective to use heat shrinkage (5K), in which the film itself shrinks at the processing temperature when manufacturing laminated windows.

The method of fixing the film around the transparent plate is, for example, the method of folding the film around the edge of the transparent plate and fixing it.
There is a method of fixing the film using a strong adhesive, or a method of fixing the film by touching the edge of the transparent plate with a fixing frame. Alternatively, a method such as heat-treating the periphery of the transparent plate using a thermoplastic resin that is part of the laminate may be considered.

For laminated windows, pressurize after removing the air from the laminate.

Since this can be obtained by heat treatment, the film should be fixed in a small amount (at least one transparent plate should not be fixed uniformly around it, but should be fixed in such a way as to leave a path for air to escape partially). Alternatively, the film may be airtightly attached around one transparent plate, and then the air between the transparent plate and the film may be vented.

On the other side of the film, atmospheric pressure or, if necessary, pressure above atmospheric pressure is applied, and a temperature above the glass transition point of the cough film is applied to ensure that the film is well placed on the transparent plate. Becomes joined. This method is particularly effective when the transparent plate has a cubic curved surface.

Each component will be explained in detail below.

The transparent plate is an inorganic or organic transparent plate-like material, and those known as inorganic glass or organic glass are preferred.

From the viewpoint of chemical durability, inorganic glass is preferable. (For example, polyvinyl butyral resin, SBR.

NBR, neoprene, polyisoprene, butyl rubber, chlorinated rubber, polyisobutylene, polyacrylic acid ester,
Examples include polyvinyl acetate, polyvinyl ether, polyvinyl chloride, polyethylene brobin copolymer, polyester, and the like. When the transparent plate is a glass plate, polyvinyl butyral resin is preferred.

Transparent film is used to increase the safety of laminated windows.
A simple unprocessed film may be laminated, or a functionalized thin film may be used. Film materials include polyethylene kephthalate resin, polyvinyl alcohol, polypropylene, polyethylene,
Examples include molded products of polyhinyl chloride resin, polybutylene terephthalate resin, polycarbonate resin, acrylic resin, polyamide resin, and other resins.

An example of imparting functionality to a film is imparting transparent conductivity, such as a thin film made of indium oxide and tin oxide, or a thin film of tin oxide.

Examples include lamination of thin films of metals such as gold, #, steel, and aluminum. Also, gold, silver, and steel are examples of materials that have selective transmittance functionality that cuts invisible heat rays from solar energy.

Examples include thin films of metals such as aluminum, nickel, palladium, Q, and alloys or mixtures thereof, or thin films of these metals with a dielectric layered on one or both sides.

Examples of the dielectric material include tantanium oxide, bismuth oxide, zinc sulfide, tungsten oxide, indium oxide, :) ruconium oxide, silicon oxide, and the like.

EXAMPLES The present invention will be specifically explained below using Examples.

Example 1 On a transparent biaxially stretched polyethylene terephthalate film with a thickness of 25 μm, silver and steel with a thickness of 120 A (the proportion of steel was 11 wt%) were provided by sputtering, and a titanium oxide layer with a thickness of 200× was further provided. The titanium oxide layer is
It was prepared by the hydrolysis method of tetrabutyl titanate.

The resulting film had a visible light transmittance of 77 cm.

The solar energy transmittance was 61 qb, and it had selective light transmittance. Also, the heat shrinkage rate of this film after being placed in an open air condition at 120°C for 30 minutes in a free state is 0.7 inches in each of the MD and TD force directions.

It was o, s%.

A polyvinyl butyral sheet having a thickness of 380 μm, the film, a polyvinyl butyral sheet having a thickness of 380 μm, and a glass plate having a thickness of 21111 I were laminated in this order on a glass plate having a thickness of 2 mm. The film was fixed around one glass plate using an epoxy resin adhesive at intervals of 1α with a width of ICIn.

After removing the air from the glass plate, it was treated in an autoclay for 30 minutes at a temperature of 90°C and a pressure of 11v/cal, then the temperature was further raised to 120°C, and then the pressure was increased to 12 to 9/cm.
d and left for 40 minutes. After cooling to room temperature, the pressure was released and the sample was taken out. The resulting laminated window had a good appearance with no wrinkles.

Comparative Example 1 The appearance of a laminate obtained in the same manner as in Example 1 except that the film was fixed to a transparent plate was not good, as unevenness was observed on the surface of the film when viewed under reflected light.

-9= Procedural amendment dated December 1980, Director General of the Patent Office 1, Indication of the case, Patent Application No. 165601 No. 2, Invention method for manufacturing a window with a title 3, Person making the amendment Related Patent Applicant: 1-11 Minamihonmachi, Higashi-ku, Osaka (300) Teijin Ltd. Representative: Tomoo Tokusue 5, "Detailed Description of the Invention" column 6 of the specification to be amended, Contents of the amendment (1) Add the following sentence after the fourth line of page 2 of the specification.

"Here, the term "laminated window" refers to a structure typified by laminated glass, in which the portion corresponding to glass is glass and/or glass.
Or it is made of a transparent material other than glass. 2- Procedural amendment (March 2, 1980, Mr. Commissioner of the Japan Patent Office 1, Indication of Case Patent Application No. 1983-165601 2, Name of Invention Method for Manufacturing Laminated Windows 3, Amendments to be made) Relationship with the case Patent applicant: 1-11 Minamihonmachi, Higashi-ku, Osaka (300) Representative of Teijin Ltd. Tomoo Iro Sue

Claims (1)

[Claims]] A method for manufacturing a laminated window formed by sequentially laminating a transparent plate, a thermoplastic resin layer, a film, a thermoplastic resin layer, and a transparent plate, in which the film is layered on at least one transparent plate. A method for manufacturing a laminated window characterized by manufacturing it by fixing it to the surrounding area. 2. The method for manufacturing a laminated window according to claim 1, wherein the film has a transparent conductive function. The method for manufacturing a laminated window according to claim 1, wherein the λ film has a selective light transmission function.