发明名称 |
DENSE ARTICLES FORMED FROM TETRAFLUROETHYLENE CORE SHELL COPOLYMERS AND METHODS OF MAKING THE SAME |
摘要 |
A dense article that includes a dense TFE copolymer film is provided. The dense TFE copolymer film includes a first endotherm between about 50°C and about 300°C, a second endotherm between about 320°C and about 350°C, and a third endotherm between about 350°C and about 400°C. To form the dense article, a core shell TFE copolymer is formed into a pellet, ram extruded into a tape, dried into a dried preform, and then stretched into a dense TFE copolymer film that exhibits improved physical and mechanical properties. The dense TFE copolymer film is produced directly from the dried preform at a deformation temperature less than about 335°C and without increasing the porosity of the dried preform, as would conventionally be done in expansion processes. The dense TFE copolymer films have a methane permeability less than about 20μg*micron/cm2/min. The dense articles have a void volume less than about 20%. |
申请公布号 |
WO2016099914(A1) |
申请公布日期 |
2016.06.23 |
申请号 |
WO2015US63609 |
申请日期 |
2015.12.03 |
申请人 |
W.L. GORE & ASSOCIATES, INC.;W.L. GORE & ASSOCIATES GMBH |
发明人 |
FORD, LAWRENCE, A.;KENNEDY, MICHAEL, E.;RAN, SHAOFENG;SAYLER, TODD, S.;SHAFER, GREGORY, J. |
分类号 |
C08J5/18;B29C55/00;C08F214/26;C08F259/08;C08L27/18 |
主分类号 |
C08J5/18 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|