US 4,302,929 AGranted

Hairy monocomponent yarn

AssigneeHoechst Aktiengesellschaft

InventorsGunther Bauer, Wolfgang Burghardt, Hilmar Moller

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Abstract

The invention provides a voluminous, false twist texturized filament yarn having a great number of individual protruding filament ends; the filaments forming the filament yarn being of the same polyester raw material. The strength of such filament yarns must be of from 1.3 and 1.7 cN/dtex at a clamping length of 5 cm, and at a clamping length of 200 cm of less than 75% of the strength at 5 cm of clamping length, at least however of 0.8 cN/dtex, and the unevenness of the yarn must be less than 3 Uster %. These filament yarns can be processed to web-like structures which correspond to webs made from staple fiber yarns obtained by secondary spinning with respect to their textile properties, their handle, drape and appearance, and which furthermore are distinguished by their low pilling.

Claims5

Dependent claims

A voluminous, false twist texturized filament yarn having individual protruding filament ends which comprises the yarn being hairy and formed of filaments of a uniform polyester raw material,

the improvement which comprises said polyester raw material contains as a fiber forming polymer a modified polyethylene terephthalate having a relative viscosity of from 1.5 to 1.65 and modified with a branching or cross-linking agent,
said agent being in a stoichiometric ratio of the agent in the polyester raw material corresponding to the stoichiometric ratio of 0.3 to 0.8 weight % of trimethylolpropane in said raw material,
the tenacity of the filament yarn at a clamping length of 5 cm being below 1.7 cN/dtex but above 1.3 cN/dtex, the tenacity at a clamping length of 200 cm being less than 75% of the strength at a clamping length of 5 cm, at least however 0.8 cN/dtex, and the unevenness of the yarn being less than 3 Uster %,
the flex abrasion resistance of the filaments of said yarn being such that a web-like structure on processing of the yarn has low pilling.

1 more element

Dependencies are inferred from the claim text.