Process for making synthetic paper pulp

Details Process for making synthetic paper pulp Process for making synthetic paper pulp

1977-07-25

1980-07-01

Bashore, S. Leon

Paper making and fiber liberation

Processes and products

Plural fiber containing

D21H 512

Patent

active

042104874

ABSTRACT:
Synthetic thermoplastic polymer fibers are prepared by extruding a foamed fibrillated sheet of a normally solid synthetic thermoplastic polymer, attenuating the molten foamed sheet as it is extruded and applying either a cutting and/or a shearing action to the solid attenuated sheet to cause it to break down into short fibers containing numerous fibrils. The polymer is polypropylene, polyethylene or a mixture of polystyrene and polypropylene or polyethylene in which the mixture contains more than 40 weight percent of the polyolefin. These short fibers can be blended with natural pulp. The resulting blend can be wet laid to form a coarse paper and then formed into a final paper product by application of heat and pressure. The resulting paper has certain superior properties.

REFERENCES:
patent: 3403203 (1968-09-01), Schirmer
patent: 3634564 (1972-01-01), Okamoto et al.
patent: 3674621 (1972-07-01), Miyamoto et al.
patent: 3730830 (1973-05-01), Driscoll
patent: 3770856 (1973-11-01), Uek et al.
patent: 3795575 (1974-03-01), Gouw
patent: 3954928 (1976-05-01), Omori et al.
patent: 4028452 (1977-06-01), Driscoll

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