09650479 cites 168 patents.

A tetrafluoroethylene (TFE) copolymer film having 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. is provided. In exemplary embodiments, the third endotherm is approximately 380° C. In some embodiments, the second endotherm is between about 320° C. and about 330° C. or between about 330° C. and about 350° C. TFE copolymer films have a methane permeability less than about 20 μg*micron/cm2/min. In addition, the dense articles have a void volume of less than about 20%. Methods for dense articles from core shell tetrafluoroethylene copolymers are also provided. The dense articles exhibit improved physical and mechanical properties such as adhesion and barrier properties.

Title
Dense articles formed from tetrafluoroethylene core shell copolymers and methods of making the same
Application Number
14/577566
Publication Number
9650479 (B2)
Application Date
December 19, 2014
Publication Date
May 16, 2017
Inventor
Gregory J Shafer
Oxford
PA, US
Todd S Sayler
Bear
DE, US
Shaofeng Ran
Kennett Square
PA, US
Michael E Kennedy
Oxford
PA, US
Lawrence A Ford
München
DE
Agent
Amy L Miller
Assignee
W L Gore & Associates
DE
W L Gore & Associates
DE, US
IPC
B29K 105/04
B29K 27/18
B29K 27/00
B29K 27/12
A61L 31/10
A61L 29/08
A61L 29/04
A61L 27/34
A61L 27/26
B29C 44/56
C08J 9/00
B29C 55/00
A61L 31/14
A61L 31/04
A61L 27/56
A61L 27/50
A61L 27/16
C08J 5/18
B32B 27/32
B32B 27/06
C08F 214/26
C08F 259/08
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