Polyester yarn and method for its manufacture

Details Polyester yarn and method for its manufacture Polyester yarn and method for its manufacture

1990-04-12

1991-09-03

Lorin, Hubert C.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

2642106, 2642108, 264211, D01F 662

Patent

active

050452606

ABSTRACT:
The method for producing dimensionally stable, low-shrinkage, chemically modified industrial polyester yarns by melt spinning at speeds of 1000 to 4000 m/min. utilizes a copolymer containing at least 85 percent by weight polyethylene terephthalate units and comonomers. During polyester production to lower the thermal shrinkage one or more conformationally fixed linear difunctional comonomers are added to the polymer melt. These difunctional comonomers have the general formula, X'--R--X, where R is an unsaturated linear alkyl group having from three to ten carbon atoms or a cycloalkyl or aromatic group with 6 or more carbon atoms, and X and X' are, independently, OR' or CPPR", and R'=H or an alkyl group and, independently, R" is also H or an alkyl group.

REFERENCES:
patent: 3576773 (1971-04-01), Vaginay
patent: 3991013 (1976-11-01), Pletcher
patent: 4070432 (1978-01-01), Tamaddon
patent: 4092299 (1978-05-01), MacLean et al.
patent: 4113704 (1978-09-01), MacLean et al.

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