Thermoformable laminate structure

• US 4,621,013 A
• Filed: 09/04/1984
• Issued: 11/04/1986
• Est. Priority Date: 11/21/1983
• Status: Expired due to Term

• Current Assignee: International Paper Company
• Original Assignee: Monsanto Company (Bayer AG)
• Inventors: Holtrop, James S., Maurer, Richard P.
• Primary Examiner(s): VAN BALEN, WILLIAM
• Application Number:
  US06/647,095
• Time in Patent Office: 791 Days
• Field of Search: 428/245, 428/246, 428/252, 428/260, 428/284, 428/286-288, 428/296, 428/304.4, 428/316.6, 428/317.1, 428/317.5, 428/317.7, 428/318.4, 428/319.3 , 428/319.7, 428/319.9
• US Class Current: 442/226
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 5/32 at least two layers being foamed and next to each other
• CPC Class Codes: G10K 11/168 Plural layers of different materials, e.g. sandwiches
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/249992 Linear or thermoplastic
• CPC Class Codes: Y10T 442/3366 Woven fabric is coated, impregnated, or autogenously bonded

Abstract

A moisture resistant, moldable, thermoformable laminate structure comprising a layer of foamed thermoplastic material having a polymer-impregnated cloth bonded to one surface thereof.

Claims

1. A moisture-resistant, moldable, thermoformable laminate structure comprising:

(a) a layer of a substantially rigid foamed thermoplastic material, selected from the group consisting of polystyrene, styrene copolymers and polyethylene, said layer having first and second surfaces; and

(b) a coating bonded to one of said surfaces;

said coating being a polymer-impregnated cloth;

wherein said polymer is a styrene-methacrylic acid copolymer having a softening temperature greater than approximately 75°

C.

2. The laminate structure of claim 1 wherein the foamed thermoplastic material is selected from the group consisting of polystyrene, styrene-maleic anhydride polymer and styrene-acrylonitrile polymer.

3. The laminate structure of claim 2 wherein the layer of foamed thermoplastic material is a foamed polystyrene.

4. The laminate structure of claim 1 wherein said fabric is a woven cloth fabric.

5. The laminate structure of claim 1 wherein said cloth is a non-woven fabric.

6. The laminate structure of claim 5 wherein said non-woven cloth is a non-woven, spunbonded fabric.