High tenacity, low denier poly(ethylene terephthalate) fibrillat

Details High tenacity, low denier poly(ethylene terephthalate) fibrillat High tenacity, low denier poly(ethylene terephthalate) fibrillat

1978-06-14

1979-12-25

Watkins, Donald

Textiles: spinning, twisting, and twining

Strand structure

Multifilament yarns

57907, 57260, D02G 306, D02G 346

Patent

active

041798759

ABSTRACT:
A low denier, high tenacity poly(ethylene terephthalate) fibrillated tape yarn particularly suited for conversion into a sewing thread which exhibits excellent sewing performance is produced by intimately mixing poly(ethylene terephthalate) polymer with from about 0.1 to 20 percent polypropylene based on the weight of poly(ethylene terephthalate), extruding the polymer mixture in the form of a tape through a slit die having a modified entry port wherein the depth of the slit is greater at both ends than at the middle, at a melt draw down of from about 26:1 to about 75:1, quenching said tape, hot drawing said tape in two stages wherein said tape is initially hot drawn to a draw ratio of from about 3.3 to about 4.2 while being subjected to a temperature of from about 80 to about 140 degree centigrade, thereafter hot drawing to a total draw ratio of about 5.0 while heated to a temperature about 160 degrees and thereafter subjecting the tape to fibrillation. A slit die with a modified entry port which allows extrusion of a low denier tape at high draw down ratios is also disclosed.

REFERENCES:
patent: 3081519 (1963-03-01), Blades et al.
patent: 3156085 (1964-11-01), Jamieson
patent: 3164947 (1965-01-01), Gaston
patent: 3214899 (1965-11-01), Wininger et al.
patent: 3242035 (1966-03-01), White
patent: 3470685 (1969-10-01), Hall et al.
patent: 3726079 (1973-04-01), Feild et al.

Affiliated with

Also associated with

Rating

High tenacity, low denier poly(ethylene terephthalate) fibrillat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with High tenacity, low denier poly(ethylene terephthalate) fibrillat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High tenacity, low denier poly(ethylene terephthalate) fibrillat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2065832