Manufacture of products having high acoustic insulating characte

Details Manufacture of products having high acoustic insulating characte Manufacture of products having high acoustic insulating characte

1972-07-14

1976-09-14

Bell, James J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 79, 156498, 156499, 264 453, 264DIG60, 428297, 428310, 428313, B32B 1702

Patent

active

039805115

ABSTRACT:
The production of composite structural products having high sound-proofing characteristics by impregnating a mat of fibers of substantial length with an organic thermoplastic resin containing an expanding agent, and thereafter heating the treated mat. The resin is partially jelled during the initial stage of heating and the expanding agent is dissociated during the later stage of the heating, which results in a controlled swelling of resin while the resin completes the jelling thereof while the product attains its predetermined density. Upon the cooling of the material it is transformed from a plastic to an elastic state, especially in the direction of thickness of the product.

REFERENCES:
patent: 2943949 (1960-07-01), Petry
patent: 2961332 (1960-11-01), Nairn
patent: 2964799 (1960-12-01), Roggi et al.
patent: 2972554 (1961-02-01), Muskat et al.
patent: 3050427 (1962-08-01), Slayter et al.
patent: 3172072 (1965-03-01), Willy
patent: 3239365 (1966-03-01), Petry
patent: 3257252 (1966-06-01), Keel
patent: 3423273 (1969-01-01), Mazur
patent: 3433700 (1969-03-01), Migdol et al.
patent: 3709752 (1973-01-01), Wistozky

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