Patent · US Expired

Co-continuous blend of a fluoropolymer and a thermoplastic and method

US6127486A · kind A · utility

32Cited by

2References

14Claims

0Family size

Assignee

W.L. Gore & Associates GmbH · DE

Inventors

Wolfgang Burger · Burgrain, DE
Richard Witzko · Günzburg, DE
Winfried Gleinser · Grafing, DE

Key dates

Filing date	Sep 11, 1998
Grant date	Oct 3, 2000
Priority date	—
Expiry date	Sep 11, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2200/0657
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Microporous PTFE (ePTFE) is known to possess certain properties based on which it is excellently suited for specific purposes, for example, the material is air-permeable and water vapor-permeable, but not water-permeable so that it can be used for filter membranes, etc. In order to create additional functions and application possibilities for this material, a material is proposed that consists of a blend of a fluoropolymer and a thermoplastic. The two substances in the material are present as continuous structures, in which at least one of these structures, preferably both structures, are microporous. The two structures are intertwined with each other and form a so-called co-continuous macrostructure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.