Polytetrafluoroethylene molding powder

Details Polytetrafluoroethylene molding powder Polytetrafluoroethylene molding powder

1994-10-12

1997-07-08

Lee, Helen

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 57, 521 59, 525199, C08J 916, C08J 922

Patent

active

056461925

ABSTRACT:
In this invention a new form of polytetrafluoroethylene has been found to be compression moldable to provide exceptionally strong molded articles. It is also useful as an additive or strength binder. The new form is a compression molding powder comprised of comminuted, sheared particles of expanded porous polytetrafluoroethylene, said particles having a nudular-microfibrilar structure of irregular shape, and a mean particle size between 5 and 500 micrometers. By irregular shape is meant that the nodes and fibrils do not have an ordered arrangement. The bulk density is about 0.06 to 0.2 g/cc.

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