Melt spinning of polypropylene

Details Melt spinning of polypropylene Melt spinning of polypropylene

1981-05-29

1984-04-10

Woo, Jay H.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264176F, 525174, 525445, C08L 6706

Patent

active

044422660

ABSTRACT:
A process of melt spinning polypropylene the improvement comprising adding to the polypropylene before it is melt spun, a small proportion of a polymer capable of forming an anisotropic melt in the temperature range at which the polypropylene may be melt spun and then melt spinning the polymers together at a wind up speed of less than 1000 meters per minute whereby in the process there is a suppression of wind up speed compared with the process carried out in the absence of the added polymer.

REFERENCES:
patent: 3591673 (1971-07-01), Pollack
patent: 3884989 (1975-05-01), Blomberg
patent: 3935337 (1976-01-01), Taylor
patent: 4189549 (1980-02-01), Matsunaga et al.
patent: 4386174 (1983-05-01), Cogswell et al.

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