Flexible laminate having copolyetherester adhesive

• US 5,110,668 A
• Filed: 12/21/1990
• Issued: 05/05/1992
• Est. Priority Date: 12/21/1990
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Minnick, Michael G.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): FRANKLIN, BEVERLY A
• Application Number:
  US07/632,310
• Time in Patent Office: 501 Days
• Field of Search: 428/290, 428/285, 428/291, 428/294, 428/215, 428/265, 428/267, 428/268, 428/246, 428/458, 156/327, 156/332
• US Class Current: 428/215
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/18 comprising iron or steel B32B15/011, B32B15/012 and B32B15/013 take precedence
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2250/03 3 layers
• CPC Class Codes: B32B 2262/0261 Polyamide fibres
• CPC Class Codes: B32B 2433/00 Closed loop articles
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/281 comprising polyimides
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/31681 Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 442/3447 Including a preformed synthetic polymeric film or sheet [i.e., film or sheet having structural integrity prior to association with the woven fabric]

Abstract

A flexible laminate comprising metal and fabric having an adhesive copolyetherester resin in the form of a film between the metal and the fabric. In a preferred embodiment, a copolyetherester resin in the form of a film is used as an adhesive for a flexible laminate made of copper foil and flexible fabric made of aromatic polyamide resin fibers. Encapsulant film may be applied to the outer surface of the fabric to enhance moisture resistance of the laminate and/or to improve the handling of the laminate.

Claims

1. A flexible laminate comprising, in sequence, metal, a copolyetherester resin film and fabric.

2. The flexible laminate of claim 1 wherein the fabric comprises aromatic polyamide resin fibers in the form of a cloth.

3. The flexible laminate of claim 1 wherein the metal is about 0.1 mil to about 10 mils in thickness;

the copolyetherester resin film is about 0.5 mil to about 50 mils in thickness; and

the fabric is about 1 mil to about 50 mils in thickness.

4. The flexible laminate of claim 3 wherein the metal is about 0.5 mil to about 5 mils in thickness;

the copolyetherester resin is about 5 mils to about 10 mils in thickness; and

the fabric is about 2 mils to about 15 mils in thickness.

5. The flexible laminate of claim 1 wherein the metal is copper foil.

6. The flexible laminate of claim 1 wherein the metal is aluminum foil.

7. The flexible laminate of claim 1 wherein the metal is stainless steel foil.

8. The flexible laminate of claim 1 wherein the copolyetherester resin film is a random copolyetherester derived from the reaction products of butanediol, dimethylterephthalic acid, hexanediol and poly(tetramethylene ether)glycol.

9. The flexible laminate of claim 1 further comprising, in sequence, a thermoplastic encapsulant film on the flexible fabric.

10. The flexible laminate of claim 9 wherein the thermoplastic encapsulant film is about 0.5 mil to about 5 mils in thickness.

11. The flexible laminate of claim 9 wherein the encapsulant film is polyetheresterimide.

12. The flexible laminate of claim 9 wherein the encapsulant film is poly(butylene) terephthalate.

13. Articles made from the flexible laminate of claim 1.

14. A sanding belt substrate made from the flexible laminate of claim 1.

15. Articles made from the flexible laminate of claim 9.

16. A sanding belt substrate made from the flexible laminate of claim 9.

17. The use of copolyetherester resin as an adhesive in a laminate of metal and fabric comprising a copolyetherester resin in the form of a film between a surface of the metal and a surface of the fabric.

18. The use of copolyetherester resin as an adhesive as in claim 17 wherein the film of copolyetherester resin is a film cast on the surface of the fabric.

19. The use of copolyetherester resin as an adhesive as in claim 17 wherein the film of copolyetherester resin is a film cast on the surface of the metal.

20. The use of copolyetherester resin as an adhesive as in claim 17 wherein the film of copolyetherester resin is a random copolyetherester derived from the reaction products of butanediol, dimethylterephthalic acid, hexanediol and poly(tetramethylene ether)glycol.

21. The use of copolyetherester resin as an adhesive as in claim 20 wherein the metal is copper foil, aluminum foil or stainless steel foil, and the fabric is a cloth of aromatic polyamide resin fibers.

22. The use of copolyetherester resin as an adhesive as in claim 21 further comprising an encapsulant, moisture impermeable film on the surface of the fabric opposite the surface having the adhesive film of copolyetherester resin.

23. The use of copolyetherester resin as an adhesive as in claim 21 further comprising an encapsulant film of polyetherimide resin or poly(butylene terephthalate) resin on the surface of the fabric opposite the surface having the adhesive film of copolyetherester resin.

24. Articles prepared from the laminate of claim 17.

25. A sanding belt prepared from the laminate of claim 17.

26. A sanding belt prepared from the laminate of claim 21.

27. A sanding belt prepared from the laminate of claim 22.

28. A sanding belt prepared from the laminate of claim 23.