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US 10,351,995 B2Granted
Polyester composition with improved dyeing properties
AssigneeParkdale Incorporated
InventorRobert Alton Usher, Jr.
Life of this patent
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Abstract
A copolymer composition is disclosed with advantages for textile fibers, yarns, blended yarns, fabrics, and garments. The composition includes polyester copolymer, between about 4.5 and 5.5 percent adipic acid based on the amount of copolymer, between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of copolymer, and between about 3.4 and 4.2 percent polyethylene glycol based on the amount of copolymer.
Claims25
A method of spinning a polyester copolymer filament comprising the steps of:
- polymerizing terephthalic acid, ethylene glycol, between about 4.5 and 5.5 percent adipic acid based on the amount of copolymer, between about 630 and 770 ppm pentaerythritol based on the amount of copolymer, and between about 3.4 and 4.2 percent polyethylene glycol based on the amount of copolymer, to a copolymer melt with less than 2 percent DEG based on the amount of copolymer;
- at an intrinsic viscosity of between about 0.58 and 0.82 and at a temperature of between about 285° F. and 295° F. and
- spinning the resulting polyester copolymer melt into filament.
A method of coloring yarn comprising:
- dyeing a yarn blended from cotton and textured polyester copolymer staple;
- wherein the yarn is between about 20 percent and 80 percent by weight cotton;
- and
- wherein the textured polyester staple has a composition of between about 4.5 and 5.5 percent adipic acid based on the amount of polyester copolymer, between about 630 and 770 parts per million (ppm) of pentaerythritol based on the amount of polyester copolymer, between about 3.4 and 4.2 percent polyethylene glycol based on the amount of polyester copolymer, and less than 2 percent diethylene glycol based on the amount of polyester copolymer;
- and
- carrying out the dyeing step at atmospheric pressure and a temperature below 212° F. (100° C.).
3 more elements
Dependencies are inferred from the claim text.