Polyester composition with improved dyeing properties
AssigneeParkdale Incorporated
InventorRobert Alton Usher
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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 9.5 and 10.5 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.
Claims17
A method of spinning a polyester copolymer filament, the method comprising:
- polymerizing a charge of:
- terephthalic acid;
- ethylene glycol;
- between about 9.5 and 10.5 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 between about 1.4 and 3 percent diethylene glycol based on the amount of copolymer, wherein the charge is polymerized at an intrinsic viscosity of between about 0.58 and 0.82 and at a temperature of between about 260° C. and 280° C.;
- 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 at atmospheric pressure and a temperature below 212° F. (100° C.), wherein the yarn is between about 20 percent and 80 percent by weight cotton, and wherein the textured polyester staple comprises a polyester copolymer having a composition of between about 9.5 and 10.5 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 between about 2 and 3 percent diethylene glycol based on the amount of polyester copolymer.
Dependencies are inferred from the claim text.