Process for making textured yarn
AssigneeCourtaulds Limited
InventorHardev S. Bahia
Life of this patent
Estimating the term…
Abstract
A filament yarn of greater than 60 percent extensibility is combined with a carrier yarn. The combined yarn is false-twisted under tension in a unit employing rotary friction elements so that the filaments of the extensible yarn break intermittently while the carrier yarn remains intact to produce a spun-like textured yarn. The tension during false-twisting may be increased to a level at which the broken filaments snarl and form slubs in the yarn. The process may be carried out with no heat setting of the false-twist to form crimps. Suitable extensible yarns include undrawn and partially-orientated yarns, polyamide and polyester yarns, and suitable carrier yarns include fully-drawn filament yarns and spun yarns.
Claims7
A process for making a textured yarn comprising combining a carrier yarn component with an extensible yarn component comprising continuous filaments of a synthetic polymeric material and having an extensibility of greater than 60 percent, and false-twisting the combined yarn under tension using a false-twist texturising unit employing rotary friction elements so as to break at least some of the filaments of the extensible yarn component intermittently along the length of the yarn whilst maintaining the carrier yarn component substantially intact.
Dependencies are inferred from the claim text.