Method for treating discontinuous cellulose fibers characterized

Details Method for treating discontinuous cellulose fibers characterized Method for treating discontinuous cellulose fibers characterized

1981-04-08

1983-11-08

Cannon, James C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428294, 428295, 428302, 428326, 428361, 524 14, 524 35, B32B 2302, B32B 2308

Patent

active

044142676

ABSTRACT:
Discontinuous cellulose fibers are treated to improve their dispersability into a matrix comprising plasticized vinyl chloride polymer. The treatment includes contacting the fibers with a mixture of an aqueous dispersion of a vinyl chloride polymer and a plasticizer so as to coat the fibers, and drying the fibers. The non-aqueous portion of the mixture is usually present in an amount of at least 25 parts per 100 parts of fibers by weight, and the weight ratio of plasticizer to vinyl chloride polymer in the mixture is from 2:1 to 25:1. The discontinuous fibers thus treated can be dispersed into a matrix comprising plasticized vinyl chloride polymer with a minimum of mixing, and the improved composites thus produced contain a minimum of clumps of undispersed fibers.

REFERENCES:
patent: 3265644 (1966-08-01), Herman et al.
patent: 3461012 (1969-08-01), Wicker
patent: 3697364 (1972-10-01), Boustany et al.
patent: 3836412 (1974-09-01), Boustany et al.
patent: 3943079 (1976-03-01), Hamed
patent: 4263184 (1981-04-01), Leo et al.

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