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US 12,655,580 B1Granted
Polyester fiber dyeing processes and compositions thereof
AssigneeShaw Industries Ltd.
InventorsSteven R Dunkle, Richard Rapp, Christopher Eric Bradley, Tansley Cornwell
Life of this patent
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Abstract
Polyester fiber dyeing processes containing superior deep dye (SDD) additive are provided. Compositions for dyeing polyester fibers and composition for fiber manufacturing containing SDD are also provided.
Claims20
A process of dyeing a polyester fiber, comprising:
- feeding a plurality of dried polyester pellets and superior deep dye (SDD) additive into a screw extruder;
- mixing polyester pellets and SDD additive via screw configuration of the screw extruder;
- removing the volatiles via connected vacuum pump to the screw extruder;
- passing molten polyester pellets and SDD through a die to produce strands;
- pelletizing, crystallizing, drying the pellets to produce a concentrate;
- spinning blends of the concentrate and virgin polyester resin into a fiber;
- selectively applying one or more colors of dye at about 100° F.;
- adjusting the pH of the dye bath between 4-7;
- applying the stream for about 10 minutes at about 210° F.;
- rinsing the polyester fiber;
- applying after treatment;
- applying the stream for about 3 minutes at about 210° F.;
- and
- rinsing and drying the dyed polyester fiber.
11 more elements
A method of providing a polyester fiber, the method comprising:
- a. forming a mixture comprising a polyester and a superior deep dye additive;
- and
- b. extruding the mixture into a fiber, wherein the fiber has a lowered melting point and an enhanced dye retention in comparison to virgin polyester fibers without the superior deep dye additive.
A method of providing a pellet, the pellet comprising an elevated concentration of an additive, the method comprising:
- a. forming a mixture comprising a polymeric material and a superior deep dye additive;
- b. extruding the mixture into a fiber;
- and
- c. pelletizing the fiber to form pellets comprising the elevated concentration of the additive, wherein the pellets are configured to reduce melting points and enhance dye retention of a desired fiber when added to virgin polyester.
1 more element
Dependencies are inferred from the claim text.