PTFE material with aggregations of nodes
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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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Citations
34 Claims
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1-19. -19. (canceled)
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20. A polytetrafluoroethylene (PTFE) material comprising:
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aggregations of nodes;
short fibrils multidirectionally extending in a plurality of planar directions to interconnect the nodes within each of at least some of the aggregations to form the aggregations; and
long fibrils interconnecting the aggregations. - View Dependent Claims (21, 22, 23, 24, 25, 34)
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26. A polytetrafluoroethylene (PTFE) material comprising:
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aggregations of nodes, the nodes in each of at least some of the aggregations being multidirectionally interconnected in at least two non-parallel planes by fibrils having average lengths of about 10 to 30 microns;
long fibrils having average lengths of about 500 to 1000 microns interconnecting the aggregations;
the at least some of the aggregations having densities of less than about 2.0 grams per cubic centimeter; and
the nodes having average densities of about 2.0 to 2.2 grams per cubic centimeter.
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27. A polytetrafluoroethylene (PTFE) material comprising:
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aggregations of nodes;
short fibrils multidirectionally extending in at least two non-parallel planes to interconnect the nodes in the aggregations; and
long fibrils interconnecting the aggregations to form expanded aggregations. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification