Production of foam webs from high-temperature-resistant...

Details Production of foam webs from high-temperature-resistant... Production of foam webs from high-temperature-resistant...

2006-05-16

2006-05-16

Kuhns, Allan R. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By mechanically introducing gas into material

C264S053000

Reexamination Certificate

active

07045082

ABSTRACT:
The invention relates to a process for producing foam webs by foam extrusion of a mixture of a polysulfone or polyether sulfone and a volatile blowing agent, where the blowing agent is water or a mixture of water with an inert gas or organic liquid, e.g. an alcohol or a ketone.

REFERENCES:
patent: 4275186 (1981-06-01), Kawakami et al.
patent: 4308352 (1981-12-01), Knaus
patent: 5017622 (1991-05-01), Bland et al.
patent: 42 07 057 (1993-09-01), None

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