Method for producing porous articles from alternating poly(ethylene tetrafluoroethylene) and articles produced therefrom

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United States of America Patent

PATENT NO 9932429
SERIAL NO

14811510

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Poly(ethylene tetrafluoroethylene) (ETFE) polymers having an average molecular weight of at least 300,000 g/mol and a melt enthalpy of at least 57 J/g are provided. The ETFE polymer may include at least one additional comonomer. The ETFE polymer is used to form a porous tape or membrane that has a node and fibril structure. A porous ETFE tape may be formed by lubricating the ETFE polymer and subjecting the lubricated polymer to pressure at a temperature below the melting point of the ETFE polymer. Optionally, the ETFE tape may be expanded at a temperature below the melting temperature of the ETFE polymer to form an expanded ETFE membrane. Alternatively, the ETFE polymer may subjected to heat and pressure without the addition of a lubricant to form a dense preform. The dense preform may be subsequently slit in a length direction and stretched to form a dense ETFE fiber.

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Patent Owner(s)

Patent OwnerAddress
W L GORE & ASSOCIATES INC555 PAPER MILL ROAD NEWARK DE 19711

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Sbriglia, Guy A Christiana, US 16 63

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