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AssigneeE. I. Du Pont de Nemours and Company
InventorsJing C. Chang, Joseph V. Kurian, Shekhar Subramoney
Estimating the term…
A process for preparing poly(trimethylene dicarboxylate) multifilament yarns and monofilaments. One process for preparing poly(trimethylene dicarboxylate) multifilament yarns comprises (a) providing a polymer blend comprising poly(trimethylene dicarboxylate) and about 0.1 to about 10 weight % styrene polymer, by weight of the polymer in the polymer blend, (b) spinning the polymer blend to form poly(trimethylene dicarboxylate) multiconstituent filaments containing dispersed styrene polymer, and (c) processing the multiconstituent filaments into poly(trimethylene dicarboxylate) multifilament yarn comprising poly(trimethylene dicarboxylate) multiconstituent filaments containing styrene polymer dispersed throughout the filaments. Another process comprises spinning at a speed of at least 3,000 m/m and processing a blend comprising poly(trimethylene dicarboxylate) to form partially oriented poly(trimethylene dicarboxylate) multifilament yarn. A poly(trimethylene terephthalate) yarn comprising poly(trimethylene terephthalate) multiconstituent filament containing styrene polymer dispersed throughout the multiconstituent filament. The invention is also directed to uses of the filament yarns and monofilament.
A process for preparing poly(trimethylene dicarboxylate) multifilament yarn comprising (a) providing a polymer blend comprising poly(trimethylene dicarboxylate) and about 0.1 to about 10 weight % styrene polymer, by weight of the polymer in the polymer blend, (b) spinning the polymer blend to form poly(trimethylene dicarboxylate) multiconstituent filaments containing dispersed styrene polymer, and (c) processing the multiconstituent filaments into poly(trimethylene dicarboxylate) multifilament yarn comprising poly(trimethylene dicarboxylate) multiconstituent filaments containing styrene polymer dispersed throughout the filaments.
A poly(trimethylene terephthalate) yarn comprising poly(trimethylene terephthalate) multiconstituent filament containing styrene polymer dispersed throughout the multiconstituent filament.
A process for preparing a poly(trimethylene dicarboxylate) monofilament comprising (a) providing a polymer blend comprising poly(trimethylene dicarboxylate) and about 0.1 to about 10 weight % styrene polymer, by weight of the polymer in the polymer blend, (b) spinning the polymer blend to form poly(trimethylene dicarboxylate) monofilament containing dispersed styrene polymer, and (c) processing the filament into poly(trimethylene dicarboxylate) multiconstituent monofilament comprising poly(trimethylene dicarboxylate) styrene polymer dispersed throughout.
A process for preparing poly(trimethylene dicarboxylate) multifilament yarn, comprising spinning at a speed of at least 3,000 m/m and processing a blend comprising poly(trimethylene dicarboxylate) and about 0.1 to about 10 weight % of another polymer, by weight of the polymers in the polymer blend, to form poly(trimethylene dicarboxylate) multifilament yarn, wherein the poly(trimethylene dicarboxylate) multifilament yarn has an elongation and tenacity within 20% of the elongation and tenacity of a poly(trimethylene dicarboxylate) multifilament yarn that only differs from the poly(trimethylene dicarboxylate) multifilament yarn in that it does not contain the other polymer and which is prepared in the same manner except that it is spun at a speed of 2,500 m/m and processed at speeds corresponding to that spinning speed.
Dependencies are inferred from the claim text.