JPS63147844A - Laminate - Google Patents

Abstract

PURPOSE:To prevent or decrease the corrosion from the end of a functional film having a thin metallic film consisting essentially of silver in particular by forming the functional film to the shape smaller than the peripheral part of glass plates at the time of sandwiching the functional film with adhesive intermediate films and the glass plates. CONSTITUTION:This laminate 4 is constituted by sandwiching the functional film 3 with the adhesive intermediate films 2 and the glass plates 1. The functional film 3 is formed to the shape smaller than the peripheral part of the glass plates 1 (notched part 5 of the functional film). The functional film 3 has preferably the shape smaller by 2-50mm than the peripheral part of the glass plates 1. Plastic films to which various functions (e.g.; transparent electric conductivity, light permselectivity etc.) are imparted are used as the functional film. The materials for the adhesive intermediate films are exemplified by polyvinyl butyral, ethylene/vinyl acetate copolymer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a laminate used for automobile windshields, laminated safety glass for vehicles and buildings.

[Prior Art] Laminated glass windows are used for transparent openings where safety is required, such as windows of automobiles, trains, airplanes, etc., or parts of buildings; α. The basic structure of a laminated glass window is a transparent plate such as a glass plate sandwiching an adhesive interlayer film, such as the widely used polyvinyl butyral sheet, but in order to give the laminated glass window even more functionality. A film has been interposed. For example, there are methods of interposing a film with excellent mechanical strength to increase safety, methods of interposing a film with a transparent dielectric film to prevent condensation, or methods of interposing a film with a transparent dielectric film that allows visible light to pass through but does not allow near-infrared light to pass through. A method has been proposed in which a film having a light selective transmission function is interposed.

Generally, the above-mentioned conductive function, selective light transmission ability, etc. 1 can be obtained by laminating a metal thin film mainly made of silver on a plastic film. However, as is well known, silver is easily degraded and eroded by light or moisture, etc. Generally, it is laminated with a plastic film as a protective layer, or stored inside double-layered glass with the surrounding area safely sealed. Used under dry conditions. In the case of laminated glass in which a functional film is sandwiched between an adhesive interlayer such as polyvinyl butyral and a glass plate, there is no problem since most of the functional film surface is protected by the adhesive interlayer and glass plate, but the area around the laminated glass However, there was a problem of discoloration due to corrosion due to the exposed functional surface at the edges. Conventionally, attempts have been made to seal the ends with a sealant as a countermeasure, but the workability is poor.

There were problems such as poor appearance and low effectiveness.

[Problems to be Solved by the Invention] The present invention provides a laminate in which a functional film is sandwiched between an adhesive interlayer film and a glass plate. The purpose is to prevent or reduce corrosion.

[Means for Solving the Problems] The present invention was invented as a result of studies based on the above-mentioned objectives, and it provides a laminate in which a functional film is sandwiched between an adhesive interlayer film and a glass plate. This is a laminate characterized in that the film has a smaller shape than the peripheral portion of the glass plate.

The present invention will be explained in detail below with reference to the drawings. 1st
The figure shows a cross-sectional view of the laminate 4 of the present invention.
The figure shows a plan view of the laminate 4 of the present invention.

The glass plate 1 in the present invention may be a raw glass plate, partially reinforced or fully reinforced, or bent into various shapes. Good too. The thickness of the glass plate is 1.0 to 2.
The length is about 0m, but especially for car window glass it is 2.
．． Approximately 0 to 6.0# is preferable.

Examples of the adhesive interlayer film 2 in the present invention include polyvinyl butyral, ethylene-vinyl acetate copolymer, and the like. These adhesive interlayers contain plasticizers and heat stabilizers.

The ultraviolet absorber 1 may contain a coloring agent and the like.

Sheet thickness is 0.10 to 1.50, preferably 0.3
0 to 0.80 m is desirable.

The functional film 3 in the present invention is a plastic film provided with various functionalities. The material of the film here is a transparent plastic film.

The following polymer resin films or sheets are used for this purpose. For example, polyethylene terephthalate,
Polyester resins such as polyethylene 2.6 naphthalate, polyolefin resins such as polycarbonate resins, polyethylene, and polypropylene, polyvinyl chloride, polysulfone, polyphenylene sulfide, polyether sulfone, polyether ether ketone, etc., polyamide resins, polyimide resins, cellophane, Examples include cellulose resins such as cellulose triacetate-1.

Among these, biaxially stretched polyethylene terephthalate film has excellent dimensional stability.

It is the most suitable film due to its transparency, smoothness, and mechanical properties.

Examples of the performance include transparent conductivity and selective light transmittance.

Examples of transparent conductive functionalities include silver base metal, metal thin films such as copper, thin films made of indium oxide and tin oxide, tin oxide thin films, and the like. In addition to silver, gold, copper, aluminum □nium, nickel, palladium, tin, and other metals include silver, gold, copper, aluminum □nium, nickel, palladium, tin, and other materials. Examples include thin films of metals of alloys or mixtures, thin films of these metals with a current-carrying body laminated on one or both sides, and those in which these structures are repeatedly laminated. Examples of dielectric materials include titanium oxide, bismuth oxide, fI
zinc oxide, tungsten oxide, indium oxide,
Examples include zirconium oxide and silicon oxide.

Methods for forming these metal thin films include vapor deposition, physical vapor deposition methods such as sputtering, and chemical plating methods, and methods for forming dielectric thin films include sputtering, coating, and the like. In the present invention, the printable film 3 is sandwiched between the adhesive interlayer 2 and the glass plate 1 to form a laminate, but the shape of the printable film 3 is made smaller than the peripheral portion of the glass. Since the adhesive interlayer film 2 is usually cut into the same shape as the peripheral part of the glass, the present invention provides the same effect as sealing the end of the functional film 1 with an adhesive interlayer film, and improves corrosion resistance. Significantly improved.

The method for forming the laminate of the present invention is to first laminate the adhesive interlayer 9 functional film and the adhesive interlayer film on a glass plate in sequence, and finally stack the glass plates, place them in a pressure bag, deaerate them, and remove the air as necessary. A typical example is a method of heating and pre-press bonding, then taking it out of the pressure bag, placing it in an autoclave, and heat-pressing it, but the method is not limited to this, and various other press bonding methods for laminated glass can be used as well.

To make the shape of the functional film smaller than the glass periphery, you can either cut the functional film smaller than the glass shape in advance, or cut the functional film onto the adhesive middle crotch and then cut only the functional film using an appropriate jig. Any method can be used, such as cutting it smaller than the periphery of the glass. The shape of the functional film is 2 to 5 mm from the glass periphery.
0s, preferably 5 to 20 mm smaller.

If this number is small, the anti-corrosion effect will be small, and if it is too large, the appearance will be unfavorable or bubbles will remain when laminated glass is produced.

[Example] Examples of the present invention will be described below.

Example 1 Functional film 3 as shown in FIG. Adhesive interlayer film 2. In a laminate consisting of glass plates 1, the glass plates have a plate thickness of 3M.
A flat glass plate (200 mm x 300 mm), an adhesive interlayer made of 0.38 mm thick polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd.), and a synthetic film with a light selective transmission function film (on a 100 uTrL thick polyester film) After forming 100 silver films by sputtering, TiO21 was formed by reactive sputtering using a Ti target.
1! A 200AM layer of J was formed. ) will be described below.

In addition, heating preliminary crimping using a crimping bag was performed at 90°C for 20 minutes.

Thermocompression bonding in an autoclave was performed under a pressure of 12 to 9 cm.

The test was carried out at 140°C for 20 minutes.

Table 1 shows the shape of the functional film in terms of the amount of cut from the periphery, and shows the appearance after laminated glass and the appearance after irradiation with Sunshine Weather Meter (Suga Test Instruments Co., Ltd.) for 000 hours. As is clear from Table 1, f? of the configuration of the present invention? The in-form is highly resistant to light/moisture-related deterioration corrosion.

[Table 1] □−□−] □□□□”

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of a V1 body according to a specific example of the present invention, and FIG. 2 shows a plan view of a laminate of the present invention. 1. Glass plate 2: Adhesive interlayer film 3: Functional film 4: Laminated board 5; Cut portion of functional film Patent applicant Teijin Ltd. Sekisui Chemical Co., Ltd. Representative Patent attorney 1) Aki Hiroshi,
1. ,＼〜ノ

Claims (3)

[Claims] (1) A laminate in which a functional film is sandwiched between an adhesive interlayer and a glass plate, wherein the functional film has a smaller shape than the periphery of the glass plate. (2) The laminate according to claim 1, which has a shape that is 2 to 50 mm smaller than the peripheral portion of the glass plate. (3) The laminate according to claim 1 or 2, wherein the functional film has a metal thin film mainly composed of silver.