Process for treatment of olefin polymer fibrils

Details Process for treatment of olefin polymer fibrils Process for treatment of olefin polymer fibrils

1979-02-28

1983-02-22

Chin, Peter

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

162157R, 264 8, B29C 2300

Patent

active

043747884

ABSTRACT:
Fibrils prepared by a differential temperature precipitation process of the type described in U.S. Pat. No. 4,013,751 are refined in isopropanol at a subambient temperature not higher than about 10.degree. C., and subsequently are treated with an aqueous solution of polyvinyl alcohol to sorb at least 1.0 weight % of polyvinyl alcohol on the fibrils. The treated fibrils, as compared with fibrils prepared by prior art processes disperse more readily in aqueous media and provide water-laid sheets having greater strength. The fibrils preferably are prepared from an olefin polymer having a weight average molecular weight of at least one (1) million.

REFERENCES:
patent: 3920507 (1975-11-01), Yonemori
patent: 4013751 (1977-03-01), Davis et al.
patent: 4049492 (1977-09-01), Lare
patent: 4134931 (1979-01-01), Hayes, Jr. et al.
patent: 4152317 (1979-05-01), Agouri et al.

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