PTFE material with aggregations of nodes

Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Composite having voids in a component

Reexamination Certificate

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C428S316600, C428S421000, C428S422000

Reexamination Certificate

active

10945520

ABSTRACT:
A novel polytetrafluoroethylene (PTFE) material includes a plurality of aggregates connected together by a plurality of relatively long fibrils. Each of the aggregates are formed of PTFE nodes that are connected together by relatively short fibrils. Preferably, the long fibrils have lengths of 500 to 1000 microns and the short fibrils have a lengths of 10 to 30 microns. The aggregates have densities of less than 2.0 grams per cubic centimeter which is lower than the densities of the solid PTFE nodes which have densities of about 2.0 to 2.2 grams per cubic centimeter.

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