Air-jet method for producing composite elastic yarns

Details Air-jet method for producing composite elastic yarns Air-jet method for producing composite elastic yarns

2005-02-01

2005-02-01

Vanatta, A. (Department: 3765)

Textiles: manufacturing

Thread finishing

Surface modification of running length

C028S220000, C028S240000

Reexamination Certificate

active

06848151

ABSTRACT:
A continuous method for producing composite elastic yarns at speeds up to 700 m/min by (a) stretching (drafting) an elastomeric yarn (e.g., spandex) by 2.0×(100%) to 10.5×(950%) while heating (max. heating temperature 220° C.) in a single or double stage draft, (b) air-jet entangling with a relatively inelastic yarn component to create a composite elastic yarn, and then (c) in-line heat-treating (max. heating temperature 240° C.) the composite elastic yarn. The initial draft stage(s) may also be carried out at ambient temperature. The resulting composite elastic yarn has improved stitch clarity, particularly suited for hosiery, and its properties can be tailored to provide fabric properties for knit and woven fabrics hitherto not possible with standard spandex yarns.

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