Undrawn polyester yarn and process for manufacturing

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525177, 264211, C08L 6702

Patent

active

046097104

ABSTRACT:
An undrawn polyester yarn comprising 0.2 to 10% by weight of a polymer having a recurring unit structure represented by the following formula (1): ##STR1## wherein R.sub.1 and R.sub.2 stand for substituents consisting of optional atoms selected from C, H, N, O, S, P and halogen atoms, with the proviso that the sum of the molecular weights of R.sub.1 and R.sub.2 is equal to or more than 40, and n is a positive integer, and having a molecular weight equal to or more than 1000, the elongation increase ratio (I) of the undrawn polyester yarn, represented by the following formula (2), being equal to or more than 8%: ##EQU1## wherein EL.sub.b stands for the residual elongation (%) of the undrawn yarn and EL.sub.o stands for the residual elongation (%) of a corresponding undrawn polyester yarn substantially free of the polymer represented by the formula (1).

REFERENCES:
patent: 2917779 (1959-12-01), Hurzke
patent: 3322854 (1967-05-01), Yasui
patent: 3591659 (1971-07-01), Brinkmann
patent: 4104261 (1978-08-01), Magosch
patent: 4251644 (1981-02-01), Joffrion
patent: 4267286 (1981-05-01), Campbell

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