Process of making poy polyester fiber
AssigneeLurgi Zimmer GmbH
InventorsHeinz-Dieter Schumann, Ulrich Thiele
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Abstract
The present invention is a pre-oriented, non-stretched polyester fiber spun with spooling speeds of at least 3,000 m/min., wherein the polyester is a copolymer comprised essentially of ethylene terephthalate units and up to 10 weight % of other dicarboxylic acids or other diols, and carboxy phosphonic acid units of the formula: ##STR1## wherein R is selected from C.sub.1-10 -alkylene, C.sub.1-10 -cycloalkylene or C.sub.6-10 -arylene, in a quantity corresponding to 30 to 500 ppm phosphorus, in relation to polyester. The invention also comprises a process for the production of this fiber.
Claims3
A pre-oriented, non-stretched polyester fiber spun with spooling speeds of at least 3,000 m/min., wherein the polyester is a copolymer consisting essentially of ethylene terephthalate units, up to 10 weight % other dicarboxylic acids or other diols, and carboxy phosphonic acid units of the formula:
- ##STR6## wherein R is selected from C.sub.1-10 -alkylene, C.sub.1-10 -cycloalkylene or C.sub.6-10 -arylene, in a quantity corresponding to 60 to 300 ppm phosphorus, relative to the polyester.
Dependencies are inferred from the claim text.