Method of making a fibrous web comprising differentially cooled/

Details Method of making a fibrous web comprising differentially cooled/ Method of making a fibrous web comprising differentially cooled/

1987-04-23

1988-11-08

Silbaugh, Jan H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156181, 156296, 264518, 264519, 264112, 264119, 264168, D04H 316, B29C 3516

Patent

active

047832312

ABSTRACT:
A fibrous web comprising fibers which have been differentially cooled to provide a crimped fiber conformation thereto and then thermally relaxed to a sufficient degree to at least partially decrimp the fibers and increase the loft and decrease the density of the web. Also disclosed is a process for forming a web of such type, comprising the steps of forming a web of fibers, bonding the fibers to form a bonded web, differentially cooling the fibers to provide a crimped fiber conformation thereto, and thermally relaxing the fibers to a sufficient degree to at least partially decrimp the fibers and increase the loft and decrease the density of the web, wherein the differential cooling step preferably is carried out prior to bonding of the fibers to form the bonded web and the thermal relaxing step is carried out after bonding of the fibers to form such web.

REFERENCES:
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patent: 3920784 (1975-11-01), Nakagawa et al.
patent: 4280860 (1981-07-01), Shen et al.
patent: 4496508 (1985-01-01), Hartmann et al.
patent: 4643940 (1987-02-01), Shaw et al.

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