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Method of manufacturing variable vane seal and washer materials

  • US 6,915,574 B2
  • Filed: 03/29/2001
  • Issued: 07/12/2005
  • Est. Priority Date: 01/29/1999
  • Status: Expired due to Fees
First Claim
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1. A method for manufacturing a bearing element comprising the steps of:

  • forming a plurality of layers from a combination of a first material and a second material, wherein a first of the layers includes an exterior surface and an interior surface, the first layer formed from a plurality of materials comprising polytetrafluoroethylene fibers, and at least one of glass fibers and carbon fibers, wherein the exterior surface includes a higher concentration of polytetrafluoroethylene fibers and the interior surface includes a higher concentration of the at least one of glass fibers and carbon fibers, and wherein a second of the layers is formed against the first layer and is formed from a material comprising at least one of glass fibers and carbon fibers, and wherein a third of the layers includes an exterior surface and an interior surface, the first layer formed from a plurality of materials comprising polytetrafluoroethylene fibers, and at least one of glass fibers and carbon fibers, wherein the exterior surface includes a higher concentration of polytetrafluoroethylene fibers and the interior surface includes a higher concentration of the at least one of glass fibers and carbon fibers;

    forming the bearing element from the plurality of layers, wherein each layer is formed from at least one of weaving materials and braiding materials;

    plasma etching each of the bearing element plurality of layers to facilitate enhancing bonding between adjacent layers; and

    impregnating each of the bearing element plurality of layers with a polyimide resin comprising polytetrafluoroethylene powder.

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