Method of controlling porosity in a composite article

Details Method of controlling porosity in a composite article Method of controlling porosity in a composite article

1992-06-26

1993-08-24

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

2101982, 2105021, 210503, 210656, 2101983, 264122, 264138, B29C 5900, B29C 6100

Patent

active

052386210

ABSTRACT:
A composite article comprising, in the unexpanded form, a fibrillated PTFE matrix and a combination of energy expandable hollow polymeric particles and sorptive particles, which composite, on applying energy such as steam, heat, or laser energy, provides an expanded article having increased void volume and decreased density. The expanded articles are porous and efficient articles for separation and purification applications. In flat or rolled form, the composite article can be used in separation devices.

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