Continuous spin-drawing process for preparing polyethylene terep

Details Continuous spin-drawing process for preparing polyethylene terep Continuous spin-drawing process for preparing polyethylene terep

1975-04-04

1977-01-18

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264290T, 264342RE, D01D 508

Patent

active

040039749

ABSTRACT:
A process is provided in which a continuous filament polyethylene terephthalate yarn having an HRV in the range of 24 to 28 is heated to a temperature in the range of 75.degree. to 250.degree. C. and drawn to a total denier in the range of 50 to 500 at a draw ratio in the range of 5.2:1 to 6:1, passed over a draw roll having a temperature in the range of 225.degree. to 250.degree. C., relaxed at a tension in the range of 0.09 to 0.15 gram per denier and wound up at a minimum speed of 2,000 yards per minute (1829 meters/minute). The yarns prepared by this process have a tenacity in the range of 7.5 to 9 grams per denier, a load-bearing capacity in the range of 3 to 5 grams per denier at 7% elongation, a maximum dry heat shrinkage of 4% at 177.degree. C. and an elongation at break in the range of 12 to 20%.

REFERENCES:
patent: 3069836 (1962-12-01), Dahlstrom et al.
patent: 3216187 (1965-11-01), Chantry et al.
patent: 3413797 (1968-12-01), Chapman
patent: 3452132 (1969-06-01), Pitzl
patent: 3562382 (1971-02-01), Fowler
patent: 3650879 (1972-03-01), Munting
patent: 3690362 (1972-09-01), Mago et al.
patent: 3715421 (1973-02-01), Martin et al.

Affiliated with

Also associated with

Rating

Continuous spin-drawing process for preparing polyethylene terep does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Continuous spin-drawing process for preparing polyethylene terep, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Continuous spin-drawing process for preparing polyethylene terep will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-72642