Process for producing synthetic pulp from a film of a mixture of

Details Process for producing synthetic pulp from a film of a mixture of Process for producing synthetic pulp from a film of a mixture of

1973-05-21

1976-04-13

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

To form particulate product

162157R, 264151, 264DIG47, B29C 1714, B02C 1900, D21H 340

Patent

active

039504735

ABSTRACT:
Synthetic pulp having a peculiar structure is prepared by making a composition consisting of 50 to 90 parts by weight of polypropylene having a melt flow rate of 30 to 150 and 50 to 10 parts by weight of low density polyethylene having a melt index of 0.5 to 10 into a film having a thickness of 70 .mu. or less, uniaxially stretching the film, cutting the stretched film to a predetermined length of 5 mm or less, and fibrillating the cut film by a crumpling and disintergrating action mainly by blows and air whirling stream. A suitable apparatus for such fibrillation is presented. Synthetic pulp thus prepared provides a paper-like material having superior properties by blending it with e.g. wood pulp.

REFERENCES:
patent: 3007765 (1961-11-01), Ruyter
patent: 3332228 (1967-07-01), Chill
patent: 3402548 (1968-09-01), Wininger et al.
patent: 3470685 (1969-10-01), Hall et al.
patent: 3473206 (1969-10-01), Boultinghouse
patent: 3503836 (1970-03-01), Rasmussen
patent: 3579618 (1971-05-01), Stewart et al.
patent: 3624194 (1971-11-01), Pirot
patent: 3645085 (1972-02-01), Rassast

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