Production of foamed polymer structures

Details Production of foamed polymer structures Production of foamed polymer structures

1988-10-03

1989-10-31

Foelak, Morton

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 53, 521 50, 521 505, 521183, 521184, 521185, 521189, 521915, B29C 3500

Patent

active

048775630

ABSTRACT:
Described are ways of improving the yields of specification grade polyimide foam on a consistent basis from one run to the next, by use of improved microwave-based foaming processes. In one such process, the microwave radiation is directed upon the top, sides and ends of the body of polyimide precursor and of the foam structure as it is developing, but the extent to which such radiation impinges upwardly into the bottom of said body and said foam structure is curtailed, preferably by means of a metallic shield located below the precursor and developing foam structure. Mechanisms by which the shields function to provide the improvements of the process are discussed, and methods based thereon are set forth.

REFERENCES:
patent: 4305796 (1981-12-01), Gagliani et al.
patent: 4361453 (1982-11-01), Gagliani et al.
patent: 4439381 (1984-03-01), Gagliani et al.
patent: 4599365 (1986-07-01), Gagliani et al.
patent: 4708972 (1987-11-01), Long et al.
Gagliani, et al NAS9-16009, Final Report, entitled "Formulation & Characterization of Polyimide Resilient Foams of Various Densities for Aircraft Seating Applications" (1981).
Gagliani, NAS9-14718, Final Report entitled "Fire Resistant Resilient Foams" (1975).
Gagliani, et al NAS9-15050, Final Report, entitled "Development of Fire-Resistant, Low Smoke Generating, Thermally Stable End Items for Aircraft & Spacecraft" (1977).
Gagliani, et al, NAS9-15848, Final Report, entitled "Development of Fire-Resistant Low Smoke Generating, Thermally Stable End Items for Commercial Aircraft & Spacecraft Using a Basic Polyimide Resin" (1980).

Affiliated with

Also associated with

Rating

Production of foamed polymer structures does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Production of foamed polymer structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of foamed polymer structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-624358