×

PTFE material with aggregations of nodes

  • US 7,306,841 B2
  • Filed: 09/20/2004
  • Issued: 12/11/2007
  • Est. Priority Date: 08/12/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A composite expanded polytetrafluoroethylene article comprising:

  • at least one layer of a first polytetrafluoroethylene material including a first plurality of nodes interconnected by a first plurality of short fibrils;

    at least one layer of a second polytetrafluoroethylene material including a plurality of aggregates of nodes and fibrils, each of the aggregates comprising a second plurality of nodes interconnected by a second plurality of short fibrils; and

    a plurality of long fibrils interconnecting the aggregates in the at least one layer of a second polytetrafluoroethylene material and connecting the aggregates in the at least one layer of a second polytetrafluoroethylene material with selected ones of the first plurality of nodes in the at least one layer of a first polytetrafluoroethylene material.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×