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US 8,808,848 B2Granted
Porous article
AssigneeW. L. Gore & Associates, Inc.
InventorJohn E. Bacino
Life of this patent
Estimating the term…
Abstract
Porous articles having an expanded fluoropolymer and a coherent irregular network are described. In one embodiment, the coherent irregular network is attached to the expanded fluoropolymer at only a portion of the adjacent region. In another aspect of the invention the coherent irregular network is a free standing film. The coherent irregular network in one embodiment has a surface roughness defined by an Sp value of greater than 35 um.
Claims73
A porous article comprising:
- a porous expanded polytetrafluoroethylene (ePTFE) membrane;
- and
- a coherent irregular network comprising particles of at least one thermoplastic fluoropolymer fused together;
- wherein a surface of said porous ePTFE membrane comprises at least one adjacent region at which said coherent irregular network is attached
- wherein the coherent irregular network comprises open areas, and
- wherein at least one of the open areas is greater than about 100 μm in size.
3 more elements
A porous article comprising:
- a porous expanded polytetrafluoroethyIene (ePTFE) membrane;
- a first coherent irregular network comprising particles of at least one thermoplastic fluoropolymer fused together, said first coherent irregular network being attached to one side of said porous ePTFE membrane;
- and
- a second coherent irregular network comprising particles of at least one thermoplastic fluoropolymer fused together, said second coherent irregular network being attached to said eTPFE membrane on a side opposing said first coherent irregular network;
- wherein at least one of the first coherent irregular network and second coherent irregular network comprises open areas and,
- wherein at least one of the open areas is greater than about 100 μm in size.
3 more elements
A porous article comprising:
- a porous expanded fluoropolymer membrane:
- and
- a coherent irregular network comprising particles of at least one thermoplastic polymer fused together,
- wherein a surface of said porous expanded fluoropolymer membrane comprises at least one adjacent region at which said coherent irregular network is attached,
- wherein the coherent irregular network is attached to said expanded fluoropolymer membrane at only a portion of the adjacent region,
- wherein the coherent irregular network comprises open areas,
- wherein at least one of the open areas is greater than about 100 μm in size,
- wherein said at least one thermoplastic polymer is a thermoplastic fluoropolymer, and
- wherein the particles of the at least one thermoplastic fluoropolymer have an MFI between 0.3 g/10 min and 10g/10 min when tested at 372° C. and 2.16 kg load.
6 more elements
A porous article comprising:
- a porous expanded fluoropolymer membrane;
- and
- a coherent irregular network comprising particles of at least one thermoplastic polymer fused together;
- wherein a surface of said porous expanded fluoropolymer membrane comprises at least one adjacent region at which said coherent irregular network is attached,
- wherein the coherent irregular network is attached to said expanded fluoropolymer membrane at only a portion of the adjacent region,
- wherein said coherent irregular network and said expanded fluoropolymer membrane have an attached area ratio between about 0.05 to 0.25,
- wherein said coherent irregular network comprises open areas,
- wherein at least one of the open areas is greater than about 100 μm in size,
- wherein said at least one thermoplastic polymer is a thermoplastic fluoropolymer, and
- wherein the particles of the at least one thermoplastic fluoropolymer have an MFI between 0.3 g/10 min and 10g/10 min when tested at 372° C. and 2.16 kg load.
7 more elements
Dependencies are inferred from the claim text.