Size-covered composite yarns and method for making same

摘要

Composite yarns, comprising one or more elastomeric fibers and hard yarns, are formed by adhering the elastomeric fibers and hard yarns together using a size material. The size-covered composite yarn can be used in weaving and knitting to make stretch fabrics with desired garment characteristics. The size material may be removed by subsequent wet fabric processing.

主权项

1. A method for making a composite yarn, comprising:
stretching a strand of one or more elastomeric fibers in a range from 1.1× to 5× of a relaxed length of the strand;
aligning at least one hard yarn selected from the group consisting of synthetic fibers, natural fibers and a blend of synthetic and natural fibers, adjacent and substantially parallel to said stretched strand to form an aligned yarn;applying a size material to said aligned yarn, wherein said size material comprises a sizing agent and optionally a wax, further wherein said size material is applied to said yarn by an aqueous or hot-melt process, and when said sizing agent is applied by an aqueous process, said size material is dissolved in water to form a solution before the size material is applied to the aligned yarn wherein concentration of the size material in the solution is from 5% to 25% by weight, and when said sizing agent is applied by a hot-melt process, said size material is applied to the aligned yarn in an amount from 3% and 6% by weight based on the aligned yarn pre-sized weight, and when wax is present in said size material, said wax is present in amounts not exceeding 1 weight % based on the solids weight of the sizing agent; anddrying or curing the size material to form a composite yarn.