JPS6142584A - Preparation of laminated article - Google Patents

Abstract

PURPOSE:To repare a laminated article continuously by placing an organic or inorganic plate material having a thermoplastic or thermosetting sheet-form interlayer in a bag, reducing the pressure in the bag, and heating and/or pressing it. CONSTITUTION:A thermoplastic or thermosetting sheet-form interlayer (e.g. a polyvinyl butyral resin) is inserted between two or more organic or inorganic plate materials to give a laminated material. This laminated material is placed in a rubber or resin bag fitted with an airtight valve such as a cock or a valve; a hose is attached to the valve; the pressure in the bag is reduced by way of an evacuator; the valve is closed; the hose is removed; and the laminated material together with the bag are heated and/or pressed to remove the air from the interlayer and to join or bond the plate materials and the interlayer with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing a laminate 1 such as laminated glass, and more specifically, it is a method for manufacturing a laminate in which air in the intermediate layer is almost completely eliminated. It is possible to remove the hose from the device when heating and/or pressurizing the product j・5 f! It is related to the method of sending.

Prior Art Conventionally, as a method for manufacturing laminated glass with an intermediate layer made of polyvinyl butyral resin or ethylene-vinyl acetate copolymer resin, etc., a laminate of glass and an intermediate layer is charged into a rubber bag or a resin bag. A hose from a pressure reducing device such as a vacuum pump is connected to the punch 10 provided at a predetermined position of the bag.

The inside of the bag is depressurized using a decompression device, and the bag is placed with the hose in an oven or other heating device for pre-heating and crimping, and then the air is removed from the bag and the crimped laminate is taken out. A common manufacturing method is to put the pre-pressed laminate into an autoclave or oven and then perform the main press-bonding.

In this conventional method, a hose is connected to reduce the pressure inside the bag, which is inconvenient to handle, and when attempting to make the preliminary crimping process continuous, for example, adhesion of the hose is a problem, making it virtually inconvenient. This is close to possible and results in batch production.

As a result of extensive research, the present inventors have completed the present invention by eliminating and improving the drawbacks of the conventional methods as described above.

In the present invention, the laminate refers to internally laminated glass for automobiles, buildings, etc.; a transparent film such as a polyester film, a metal-deposited transparent film, a heat-absorbing transparent film, etc. is sandwiched between interlayers (intermediate layers). Functional laminated glass; or a laminate made of organic or inorganic materials that seals or protects electronic materials such as liquid crystals, solar cells, electroluminescence, and plasma displays.

9 In the present invention, the plate made of organic or inorganic material is made of glass, glycarbonate, acrylic resin, polyethylene, transparent nylon, polyester, fluororesin, etc. Depending on the purpose, it may be made of transparent or inorganic material. Anything from solid to opaque can be used.

The present invention provides a laminate in which a thermoplastic or thermosetting sheet-like intermediate layer is interposed between two or more plates made of organic or inorganic materials.
After charging the bag into a rubber or resin bag equipped with a valve or similar airtight valve, attach a hose to the valve and reduce the pressure inside the bag through the valve using a pressure reducing device. Then, close the above valve and remove the hose from the valve, then close the above valve and remove the hose from the valve, or attach a thin hose-like tubular body to a bag-like object in place of the valve 6, and attach the hose to the tubular body. Once installed, the pressure inside the bag is reduced through the tubular body using a pressure reducing device, and then the vicinity of the bag in the hose-like tubular body is sealed by heat or by tying, the hose is removed, and each bag is charged and laminated. A method of manufacturing a laminate, such as laminated glass, in which each of the plates and each of the intermediate layers are brought into close contact or bonded together by heating and/or pressurizing the material, and at the same time air is removed from the intermediate layer. 〆I//Or by attaching a valve commonly used for tires or tubes, or a cock used for a gas faucet or water faucet, etc. to the resin bag, or as described above. By attaching a thin hose-like tubular body, the pressure is reduced using a pressure reducing device using the hose, and then the valve or cock is closed and the hose is removed, or the above-mentioned bow-like tubular body is sealed with the above-mentioned means to reduce the pressure inside one bag. This is a method for producing a laminate, in which the laminate is placed in an oven or autoclave while maintaining the same temperature, and the laminate is bonded or crimped by heating and/or pressure.

Since the manufacturing method according to the present invention does not require connecting a hose, it is possible to heat the product by placing it on a conveyor belt and continuously charging it into a hot air oven, far-infrared oven, etc., for example.

In addition, when a thermoplastic intermediate layer such as polyvinyl butyral resin is used, the pre-pressing process can be omitted, and the bag-like material can be heated and pressurized in an autoclave while being kept at reduced pressure, making it possible to produce A significant improvement in performance can be expected.

Means for Solving the Problems The valve or cock used in the manufacturing method of the present invention may be any valve as long as it has good airtightness, but in particular cored valves used for automobile tires may be used. Commonly used are valves for bicycle tires, hooks for water taps, cocks for gas valves, etc. In particular, valves for automobile tires are preferred in terms of their small size and light weight.

What are the characteristics of fur-covered pulp for automobile tires?

There is a fur called "mushi" inside.

It has a high degree of airtightness in its current state. If you want to let air in, you can do this by pushing in the tip of the fur, but there is a spring at the bottom of the fur, and if you stop pushing in the tip, it will automatically prevent air from going in and out. It is possible.

It is extremely small and lightweight, and has high performance. In addition, if you use a special air chuck to let air in and out,
Furthermore, it is possible to easily reduce the pressure inside the bag.

Also, attach a thin hose-like tubular body to a bag-like object.

A hose may be attached to this tubular body, and the pressure inside the bag may be reduced through the tubular body using a pressure reducing device, and then the area of the hose-like tubular body near the bag may be sealed with heat or by tying.

There are various valves other than those mentioned above, but even a type of valve with a bearing mounted on a roller can fully achieve the purpose.

Next, as the material for the bag-like material used in the method of the present invention, rubber-based or resin-based materials are suitable. Preferred rubber-based materials include natural rubber, polybutadiene rubber, styrene-butadiene rubber, ethylene-propylene-diene ternary copolymer rubber, butyl rubber, and halogenated butyl rubber; examples of resin-based materials include polyethylene and polypropylene.

These include polyethylene terephthalate, polybutylene terephthalate, various nylons, cellophane, etc.

A bag-like product formed from each sheet is used.

Molding is usually done using adhesive, pressure-sensitive adhesive or hot melt adhesive to form a bag-like product, and a hole is made on one side and a valve is attached.
After placing the laminate in the bag, the opening is closed, and then the pressure inside the bag is reduced by a pressure reducing device via a valve and a hose.
After maintaining the reduced pressure for several minutes, the valve is closed, the hose is removed, and the bag is placed in a heating and/or pressurizing device such as an oven or autoclave to produce the desired laminate, such as laminated glass. can get.

Furthermore, in carrying out the manufacturing method according to the present invention, in order to effectively degas the air between the laminated plates.

Providing an air circulation path at the edge of the laminate and wrapping the entire laminate in air-permeable material such as non-woven fabric is very effective in terms of deaeration to completely remove the internal air. It goes without saying that there is.

EXAMPLES The present invention will be explained in more detail with reference to Examples below.

Example 1 A butyl rubber waterproof sheet was molded into a bag shape using an acrylic adhesive and a hole was formed on one side to make a tire valve TR-13.
(with rubber cover manufactured by Taiheiyo Kogyo Co., Ltd.) was attached to the hole using acrylic adhesive, and the thickness of the two sheets was 311! ! E, 30
Ethylene-vinyl acetate copolymer interlayer film for laminated glass (thickness: 0.41 nm) between float glasses of 0TILvL angle
A laminate with double-sided embossed crystals (embossed crystals on both sides) interposed therein (air circulation channels are provided at the edges and the whole is wrapped with polyester nonwoven fabric) is inserted into the bag-like object through the opening of the bag-like object, and then the laminate is inserted through the opening of the bag-like object. was closed with an acrylic adhesive, a tire air filling chuck was attached to the end of the hose using a vacuum pump, and the pressure inside the bag was reduced for 5 minutes through this chuck. Then, when the air chuck is removed, 1
No air was allowed to enter the bag.

After being treated under reduced pressure for 5 minutes, each bag was placed in an open chamber set at 100° C. and treated for 30 minutes. Thereafter, the bag was opened and the treated laminate (laminated glass) was taken out.No residual air was observed in this laminated glass.

Example A laminated glass was obtained in the same manner as in Example 1, except that a polyethylene film (thickness: 50 μm) was used instead of the cobutyl rubber waterproof sheet and a bag-like object was obtained by real-melt adhesion (using an iron). No air residue was observed in the laminated glass.0 Example 3 A bag-like product was obtained in the same manner as in Example 1, except that a polyester film (thickness 20 μm) was used to obtain a bag-like product by hot-melt adhesion (using an iron). A laminated glass was obtained in which no residual air was observed.

Example 1 A bag-like article was obtained by hot-melt adhesion (using an iron) using a nylon film (thickness: 50 μm).

Two 300H square iron plates (ss
-41) A polyvinyl butyral interlayer film (a double-sided embossed product with a thickness of 0.41 nW made by mixing 100 parts by weight of high polymerization type polyvinyl butyral resin with 40 parts by weight of plasticizer dioctyl adipate and extrusion molding at 140°C) A laminate was obtained in the same manner as in Example 1, except that the interposed laminate and the autoclaving temperature after the vacuum treatment were 120°C. No residual air was observed in this laminate.

Example A laminated glass was obtained in the same manner as in Example 1, except that a polyester film (thickness: 50 μm) was used to obtain a bag-like object using an acrylic adhesive. No residual air was observed in this laminated glass.

Example B A thin hose-like tubular body is attached to the bag-like object instead of the air filling chuck of the tire, and the hose is attached to the bag-like object into which the laminate is charged through the tube-like object by a pressure reducing device. A laminated glass was obtained in the same manner as in Example 1, except that the pressure was reduced and then the tubular material was sealed with heat. No residual air was observed in this laminated glass.

Example 7 A bag containing the laminate treated under reduced pressure according to Example 3 was
It was placed in an oven set at 160°C and heated for 40 minutes. Thereafter, the laminate was taken out from the bag and observed, but no residual air was observed.

Furthermore, the obtained laminated glass had good transparency, no glass scattering was observed in the falling ball test, and the adhesive strength was also excellent.

Therefore, the preliminary pressure bonding step in the conventional method is no longer necessary.

Claims (3)

[Claims] (1) A laminate in which a thermoplastic or thermosetting sheet-like intermediate layer is interposed between two or more plates made of organic or inorganic materials, such as a cock, valve, or similar airtight After charging the bag into a rubber- or resin-based bag equipped with a high-performance valve, attach a hose to the valve and reduce the pressure inside the bag through the valve using a pressure reducing device, and then close the valve. The feature is that by closing the valve, removing the hose from the valve, and heating and/or pressurizing the charged laminate together with the bag-like material, each plate body and each intermediate layer are brought into close contact or bonded together while simultaneously removing air from the intermediate layer. A method for manufacturing a laminate. (2) The method according to claim (1), wherein the valve is a cored valve or a bicycle valve. (3) A thin hose-like tubular body is attached to a laminate in which a thermoplastic or thermosetting sheet-like intermediate layer is interposed between two or more plates made of organic or inorganic materials. After charging into a rubber or resin bag, a hose is attached to the hose-like tubular body and the pressure inside the bag is reduced through the tubular body using a pressure reducing device, and then the hose-like tubular body is By sealing the vicinity of the bag with heat or by tying and sealing the vicinity, removing the hose, and heating and/or pressurizing the charged laminate together with the bag, air can be removed from the middle layer at the same time. A method for manufacturing a laminate, characterized in that each of the above-mentioned plates and each intermediate layer are brought into close contact or bonded.