摘要 |
Improved expanded PTFE materials and improved gasket materials made therefrom, the gaskets being capable of forming a seal with greater bolt load retention than is possible with existing, PTFE gaskets. The expanded PTFE membranes of the invention can be tailored to exhibit a matrix tensile strength in at least one direction of at least 25,000 psi, a matrix tensile strength ratio in two orthogonal directions of between .025 and 4, an orientation index of 50<°> or less, and a density of 2.0 g/cc or less. The improved gaskets exhibit improved mechanical properties such as high bolt load retention, low creep, high tensile strength, low stress to seal and high crystallinity index. |
申请人 |
GORE ENTERPRISE HOLDINGS, INC.;BOWEN, CHRISTOPHER;DOVE, KEVIN, EDWARD;JONES, CARL;MINOR, RAYMOND, B. |
发明人 |
BOWEN, CHRISTOPHER;DOVE, KEVIN, EDWARD;JONES, CARL;MINOR, RAYMOND, B. |