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US 12,606,939 B2Granted
Polymer fiber with additive and methods and articles related thereto
AssigneeShaw Industries Group, Inc.
InventorsChristopher S. Bryant, Alexander Freas, Tansley Cornwell, Luke Tixier, Alan Schaff, Jonathan Hatch, Caleb Cochran
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Abstract
Described is a fiber containing at least one polymer and at least one additive. The concertation of the additive is not constant throughout the fiber, but changes along the length of the fiber. Also disclosed is a method of making a fiber.
Claims20
A method comprising:
- injecting a first additive into a polymer flow of a main polymer transfer line to produce a modified polymer flow, wherein injecting the first additive into the polymer flow of the main polymer transfer line comprises changing a flow rate of the first additive at least twice within fifteen minutes to provide at least a first flow rate, a second flow rate that occurs after the first flow rate, and a third flow rate that occurs after the second flow rate, wherein the second flow rate is greater than each of the first flow rate and the third flow rate, or wherein the second flow rate is lower than each of the first flow rate and the third flow rate, wherein the first, second, and third flow rates are positive flow rates;
- and
- forming, by at least one spinneret, at least one fiber from the modified polymer flow, wherein, after forming the at least one fiber, the at least one fiber has a length and a color pattern along the length due to changing the flow rate the first additive in the modified polymer flow.
Dependencies are inferred from the claim text.