Elastic core yarns based on linen, or hemp, or other materials, and elasticized fabrics therefrom
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United States of America Patent
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Aug 16, 2022
Grant Date -
Dec 3, 2020
app pub date -
Feb 19, 2019
filing date -
Feb 19, 2018
priority date (Note) -
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Abstract
A method is provided for manufacturing an elastic core yarn in which a core comprises an elastic fiber and a continuous yarn arranged along the elastic fiber, and in which a covering yarn of such a natural material as flax, hemp, ramié, bamboo, jute, is helically wrapped about the core. A step of helically wrapping the core with the covering yarn is carried out in such a way that a number T of coils covering yarn is formed about a length unit of the elastic fiber larger than a predetermined minimum value depending on the linear mass density Nm of covering yarn, and that the covering yarn becomes twisted with a final twist direction “S” or “Z” that is opposite to an initial twist direction “Z” or “S”, respectively. The step of wrapping is performed in a wrapping space enclosed within a container.
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