Lock set structure

Details Lock set structure Lock set structure

1989-04-27

1990-02-20

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428218, 428284, 428288, 428296, 428297, 428298, 428300, 428408, D04H 108

Patent

active

049025619

ABSTRACT:
A process for producing an interlocked fibrous structure useful as a thermal insulating and/or sound absorbing structure comprising at least one batting of non-flammable carbonaceous fibers, by the steps comprising implanting said batting with non-carbonaceous polymeric fibers and then heat treating the structure in an inert atmosphere so as to transform said non-carbonaceous fibers into substantially permanently set carbonaceous fibers.

REFERENCES:
patent: 4284680 (1981-08-01), Awano et al.
patent: 4412675 (1983-11-01), Havakubo
patent: 4631118 (1986-12-01), McCullough et al.
patent: 4643931 (1987-02-01), McCullough et al.

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