W.L. Gore &； Associates GmbH;W.L. Gore &； Associates, Inc.
发明人:
Michael Wendlandt,Wolfgang Burger,John William Dolan
申请号：
US16456653
公开号：
US20190322820A1
申请日:
2019.06.28
申请国别(地区):
US
年份:
2019
代理人:
摘要：
The present invention relates to a process for producing a fluoropolymer article having a high surface roughness and high coarseness which comprises the following steps:a) forming a paste comprising a fluoropolymer into a paste-formed fluoropolymer product at a temperature lower than 50° C.,b) densifying the paste-formed product, andc) stretching the densified paste-formed fluoropolymer product in at least one direction.The present invention further relates to a fluoropolymer article obtainable by a process according to the invention.The present invention furthermore relates to a fiber comprising, or consisting of, a fluoropolymer having a surface roughness expressed as a peak to valley distance (Rt) greater than 10 micrometer and/or an average surface roughness (Ra) greater than 1.5 micrometer.The present invention furthermore relates to a membrane comprising, or consisting of, a fluoropolymer having a coarseness index ρ/EBP of at least 0.3, an air permeability of 15 ft3/ft2/min or higher and a node aspect ratio of below 25.
