# US 5,352,530 A · Transparent films and laminates having the same

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- Number: US 5,352,530 A
- Document ID: US5352530A
- Status: Granted
- Kind: A
- Application number: 07/895,457
- Filed: 1992-06-08
- Granted: 1994-10-04
- Earliest claimed: 1985-12-23
- Assignees: Bridgestone Corporation
- Inventors: Itsuo Tanuma; Hideo Takeichi; Hiromi Ohtsuru; Toshio Honda
- Web page: https://patentgrep.com/patent/US5352530A

## CPC

- B32B 27/16: specially treated, e.g. irradiated
- B32B 15/08: of synthetic resin
- B32B 17/10018: {comprising only one glass sheet}
- B32B 17/10036: {comprising two outer glass sheets}
- B32B 17/10174: {Coatings of a metallic or dielectric material on a constituent layer of glass or polymer}
- B32B 17/10688: {Adjustment of the adherence to the glass layers}
- B32B 17/10697: {being cross-linked}
- B32B 17/10706: {being photo-polymerized}
- B32B 17/10761: {containing vinyl acetal}
- B32B 17/10788: {containing ethylene vinylacetate}
- B32B 27/08: of synthetic resin
- B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers}
- C08F 255/026: {on to ethylene-vinylester copolymers}
- C08J 5/18: Manufacture of films or sheets
- C09J 123/08: Copolymers of ethene (C09J123/16 takes precedence)
- B32B 2307/412: Transparent
- B32B 2457/202: LCD, i.e. liquid crystal displays
- C08J 2323/08: Copolymers of ethene (C08J2323/16 takes precedence)
- Y10S 428/913: Material designed to be responsive to temperature, light, moisture
- Y10T 428/24917: including metal layer
- Y10T 428/24926: including ceramic, glass, porcelain or quartz layer
- Y10T 428/31547: Of polyisocyanurate
- Y10T 428/31645: Next to addition polymer from unsaturated monomers
- Y10T 428/31649: Ester, halide or nitrile of addition polymer
- Y10T 428/31678: Of metal
- Y10T 428/31699: Ester, halide or nitrile of addition polymer
- Y10T 428/31797: Next to addition polymer from unsaturated monomers
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A highly transparent film having high strength, suitable extensibility, high weather resistance, low moisture absorption and so on is disclosed, which consists mainly of EVAT. And also various laminates making the most of the above properties of the film are disclosed, which comprise the EVAT interposed between two inorganic material sheets, two organic material sheets, or an inorganic material sheet and an organic material sheet.

## Claims

### Claim 1

A laminate comprising two glass sheets, two transparent films sandwiched therebetween, each film consisting essentially of an ethylene vinyl acetate copolymer triallyl isocyanurate-crosslinked structure, and a semiconductor wafer interposed between the films; wherein,
(a) the content of vinyl acetate in the ethylene vinyl acetate copolymer of the ethylene vinyl acetate copolymer triallyl isocyanurate-crosslinked structure is 15-50% by weight, and
(b) the content of triallyl isocyanurate based on 100 parts by weight of the ethylene vinyl acetate copolymer is 0.5-20 parts by weight.

### Claim 2

A safety sandwich glass comprising a transparent film interposed between two glass sheets wherein said transparent film consists essentially of an ethylene vinyl acetate copolymer triallyl isocyanurate-crosslinked structure; and, wherein,
(a) the content of vinyl acetate in the ethylene vinyl acetate copolymer of the ethylene vinyl acetate copolymer triallyl isocyanurate-crosslinked structure is 15-50% by weight, and
(b) the content of triallyl isocyanurate based on 100 parts by weight of the ethylene vinyl acetate copolymer is 0.5-20 parts by weight.