Cured polyimide foam structures and their production

Details Cured polyimide foam structures and their production Cured polyimide foam structures and their production

1989-05-26

1990-02-06

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

264321, 4283171, 4283173, 4284735, B32B 326, B32B 2734

Patent

active

048987638

ABSTRACT:
A body of cured polyimide foam is treated with steam to produce a non-flexible, non-resilient cellular structure. A molding member is impressed into this structure to a depth less than the full thickness of the structure. The structure is then cured to polyimide foam with the molding member removed therefrom either before, during or after the curing has been completed. The resultant articles, which may be laminated, are useful as panels to dampen vibration and sound, and to provide thermal insulation. In addition the articles are flame resistant and flexible.

REFERENCES:
patent: 3726834 (1973-04-01), Acle, Jr.
patent: 4070312 (1978-01-01), Gagliani et al.
patent: 4319000 (1982-03-01), Gagliani et al.
patent: 4433068 (1984-02-01), Long et al.
patent: 4562112 (1985-12-01), Lee et al.
patent: 4576862 (1986-03-01), Lee et al.
patent: 4639343 (1987-01-01), Long et al.
patent: 4708972 (1987-11-01), Long et al.

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