Process for forming composite insulator

• US 6,827,894 B1
• Filed: 06/30/2000
• Issued: 12/07/2004
• Est. Priority Date: 06/30/2000
• Status: Expired due to Fees

• Current Assignee: Owens Corning Intellectual Capital, LLC (Owens Corning)
• Original Assignee: Owens- Corning Fiberglas Technology Incorporated (Owens Corning)
• Inventors: Tilton, Jeffrey Allan, Price, Cary E.
• Primary Examiner(s): Staicovici, Stefan
• Application Number:
  US09/607,268
• Time in Patent Office: 1,621 Days
• Field of Search: 264/138, 264/258, 264/263, 264/266, 264/324, 264/325, 264/327, 264/322, 264/DIG.65, 156/245
• US Class Current: 264/138
• CPC Class Codes: B29C 43/206 by pressing the material between two preformed layers, e.g. deformable layers
• CPC Class Codes: B29K 2105/06 containing reinforcements, fillers or inserts
• CPC Class Codes: B29K 2995/0002 insulating
• CPC Class Codes: B29K 2995/0015 Insulating
• CPC Class Codes: B29L 2031/3041 Trim panels

Abstract

A process for forming a multilayer composite insulator includes: (a) forming an insulator precursor by orienting an insulation insert in a desired location between a first facing layer of and a layer of a polymer based blanket material; (b) closing the insulator precursor in a molding press; (c) heating the insulator precursor in the molding press to a temperature sufficiently high to soften polymer binding fiber in the polymer based blanket material and cause reshaping; and (d) cooling the insulator precursor in the molding press so as to set the insulator precursor in its molded shape and complete formation of the insulator. Other relates processes are also disclosed.

Claims

1. A process for forming a multilayer composite insulator, comprising:

forming an insulator precursor by orienting an insulation insert in a desired location between a first facing layer and a layer of polymer based blanket material;

closing said insulator precursor in a molding press and crimping at least one selected area of said insulator precursor;

heating said insulator precursor in said molding press to a temperature sufficiently high to soften only said polymer binding fiber in said at least one selected area of said layer of polymer based blanket material; and

opening said molding press and removing said insulator wherein said insulator includes said at least one selected area characterized by relatively high density and relatively increased rigidity.

2. The process of claim 1 further including cutting said first facing layer, said layer of polymer based blanket material and said insulation insert to desired dimensions prior to forming.

3. The process of claim 1 wherein said heating of said insulator precursor is to between 200-400°

F.

4. The process of claim 1 wherein said heating of said insulator precursor is to between 300-375°

F.

5. The process of claim 1, including applying pressure to said insulator precursor in said molding press at a level between approximately 0.5-100.0 psi.

6. The process of claim 5 wherein said pressure is applied for between substantially 5-45 seconds.

7. The process of claim 5 including compressing said insulator precursor between approximately 10-95% when applying pressure.

8. The process of claim 1, including orienting a second facing layer with said insulation insert, said first facing layer and said layer of polymer based blanket material when forming said insulator precursor.

9. A process for forming a multilayer composite insulator, comprising:

forming an insulator precursor by orienting an insulation insert in a desired location between a first facing layer and a layer of a polymer based blanket material including polymer binding fibers; and

molding said insulator precursor into a desired shape by;

heating said insulator precursor;

applying pressure to said insulator precursor;

softening only those polymer binding fibers present in at least one selected area of said polymer based blanket material; and

crimping said at least one selected area.