Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Shaping by extrusion
Patent
1976-10-26
1980-03-25
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Shaping by extrusion
264176F, 264235, 2642893, D01D 512
Patent
active
041950526
ABSTRACT:
An improved process is provided for the formation of a high performance polyester (at least 85 mol percent polyethylene terephthalate) multifilament yarn. The product possesses a high strength (at least 7.5 grams per denier) and an unusually stable internal structure which renders it particularly suited for use in industrial applications at elevated temperatures. The filaments are melt spun and uniformly quenched under relatively high stress conditions (as described) to yield an as-spun filamentary material of relatively high birefringence (+9.times.10.sup.-3 to +70.times.10.sup.-3) which is passed in-line from the quench zone to a first draw zone where it is drawn at a draw ratio of 1.01:1 to 3.0:1, and subsequently is drawn (as described) to achieve at least 85 percent of the maximum draw ratio of the as-spun filamentary material. The resulting filamentary material exhibits unusually low shrinkage and hysteresis characteristics (i.e. work loss characteristics) as well as the high strength chatracteristics. Accordingly, when utilized in the formation of a tire cord and embedded in a rubber matrix a highly stable tire may be formed which exhibits a significantly lesser heat generation upon flexing.
REFERENCES:
patent: 3361859 (1968-01-01), Cenzato
patent: 3651198 (1972-03-01), Mitsuishi et al.
patent: 3715421 (1973-02-01), Marten et al.
patent: 3752457 (1973-08-01), Parmeggiani et al.
patent: 3798298 (1974-03-01), Krimpen et al.
patent: 3838561 (1974-10-01), Munting
patent: 3946100 (1976-03-01), Davis et al.
patent: 3949041 (1976-04-01), Schwarz
patent: 3975488 (1976-08-01), Patterson
patent: 3977175 (1976-08-01), Yoshikawa et al.
patent: 3979496 (1976-09-01), Schwarz
patent: 3987136 (1976-10-01), Schippers
patent: 4000239 (1976-12-01), Hamana et al.
patent: 4003974 (1977-01-01), Chantry et al.
patent: 4019311 (1977-04-01), Schippers
patent: 4113821 (1978-09-01), Russell et al.
Davis Herbert L.
Jaffe Michael L.
LaNieve, III Herman L.
Powers Edward J.
Celanese Corporation
Genoni Kenneth A.
Woo Jay H.
LandOfFree
Production of improved polyester filaments of high strength poss does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Production of improved polyester filaments of high strength poss, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Production of improved polyester filaments of high strength poss will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1401578