Method of extruding polypropylene yarn

Details Method of extruding polypropylene yarn Method of extruding polypropylene yarn

1981-01-27

1982-08-31

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

2642108, 264234, D01D 512

Patent

active

043472060

ABSTRACT:
A method of extruding polypropylene filaments in which the polypropylene is extruded at a temperature below 375.degree. F., such as in the range 335.degree. F. to 365.degree. F., particularly about 350.degree. F., into a quiescent hot zone having a temperature sufficiently high to retard cooling of the extruded polypropylene filaments. The filaments are then passed through and cooled in a quench zone across which cooling air is blown. The polypropylene has a narrow molecular weight distribution with a swell value less than 2.5, and its melt flow may be greater than 30. The yarn is drawn-down in the hot zone and the filaments may be drawn-down to an undrawn denier of less than 15 with substantial elimination of resonance.

REFERENCES:
patent: 2947598 (1960-08-01), Maragliano et al.
patent: 3435108 (1969-03-01), Hendry
patent: 3437725 (1969-04-01), Pierce
patent: 3686049 (1972-08-01), Manner et al.

Affiliated with

Also associated with

Rating

Method of extruding polypropylene yarn does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of extruding polypropylene yarn, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of extruding polypropylene yarn will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2184015