Low coefficient of friction fibers

• US 6,143,368 A
• Filed: 02/10/1998
• Issued: 11/07/2000
• Est. Priority Date: 02/10/1998
• Status: Expired due to Fees

• Current Assignee: Whitford Worldwide Company
• Original Assignee: Robert T. Gunn
• Inventors: Gunn, Robert T.
• Primary Examiner(s): Dudash, Diana
• Assistant Examiner(s): CHEN, BRET P
• Application Number:
  US09/021,325
• Time in Patent Office: 1,001 Days
• Field of Search: 427/208, 427/207, 427/177, 427/289, 427/358, 427/393.4, 427/412.1, 427/243, 427/171, 427/173, 427/176
• US Class Current: 427/407.1
• CPC Class Codes: D01D 5/426 by cutting films
• CPC Class Codes: D01F 8/04 from synthetic polymers

Abstract

A fiber having a surface with a relatively low coefficient of friction portion and a relatively high coefficient of friction portion. The fiber may be produced by slitting a film/sheet which has been coextruded, laminated and/or coated, or by partially coating a base fiber. Fabrics made from such fibers exhibit increased structural integrity.

Claims

1. A method of producing a fiber, comprising the steps of:

coating a sheet of material to form a coated sheet, said coated sheet having at least a first outer layer, a second outer layer, and a center layer;

wherein said center layer is made up of a material having a higher coefficient of friction than the material making up at least one of said outer layers; and

orienting and slitting the coated sheet to form fibers, such that the top surface of said fibers are made up of the same material as said first outer layer, the bottom surface of said fibers are made up of the same material as said second outer layer, the side surfaces of said fibers are made up of the same material as said center layer, and the side surfaces of said fibers have a coefficient of friction that is 1.10 to 5.00 times the coefficient of friction of at least one of said top surface of said fibers and said bottom surface of said fibers.

2. The method set forth in claim 1, wherein the step of coating a sheet of material to form a coated sheet involves coating the sheet of material with a material selected from the group consisting of:

silicone, silicone copolymers, silicone elastomers, polytetrafluoroethylene, homopolymers and copolymers thereof, graphite, boron, polypropylene and polyethylene.

3. The method set forth in claim 2, wherein the step of coating a sheet of material to form a coated sheet involves coating the sheet of material with polytetrafluoroethylene.

4. The method set forth in claim 1, wherein the step of coating a sheet of material to form a coated sheet involves coating the sheet of material with a material having a coefficient of friction that is less than 0.3.

5. The method set forth in claim 1, wherein the said first outer layer and said second outer layer have different coefficients of friction.

6. The method set forth in claim 1, wherein the said first outer layer and said second outer layer have the same coefficient of friction.

7. The method set forth in claim 1, wherein the material making up said first outer layer and the material making up said second outer layer are the same material.

8. The method set forth in claim 1, wherein the material making up said center layer includes a material, or a combination of materials, selected from the group consisting of:

a shock absorbing material, a thermally insulating material and a thermal radiating material.

9. The method set forth in claim 1, wherein the material making up said center layer is a foam.