Characteristics of double-core wrapped yarn

Release time:

2025-02-26

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Abstract

Double-core wrapped yarn is made from short fibers as the outer wrapping material, and two different types of long fibers as the core yarn, spun together through twisting. Due to the different properties of the two core yarns, a strong complementarity is created, giving the yarn superior characteristics. For example, cotton-wrapped T400 + spandex.

Double-core wrapped yarn is made from short fibers as the outer wrapping material, and two different types of long fibers as the core yarn, twisted and spun into yarn. Due to the different properties of the two core yarns, a strong complementarity is created, giving the yarn superior characteristics. For example, cotton-wrapped T400 + spandex. The characteristics of T400 are: good bulkiness, excellent elastic recovery, better dimensional stability than spandex, and higher strength. The characteristics of spandex are high elasticity and the ability to withstand repeated stretching. Using these two long fibers as core yarns, the yarn produced with cotton fibers not only maintains the good moisture absorption, softness, and elasticity of cotton-spandex yarn but also has higher strength, abrasion resistance, and dimensional stability. Fabrics made from this yarn provide a feeling of no restriction, no pressure, and no looseness when worn. Additionally, they are abrasion-resistant, have high tear strength, low shrinkage, and good shape retention.

 

Key to double-core yarn production
Double-core yarn is produced by introducing two types of long fibers into the front roller of the fine spinning machine through a guide wheel, where they are wrapped and twisted by short fibers. Different long fibers require different pre-stretching tensions to exhibit their respective characteristics. One of the keys to production is to control the tension and stability of the long fibers. It is essential to ensure that the tension is consistent within the same spindle and between spindles. Fluctuations in long fiber tension will directly affect the width variation of the fabric. Currently, the control of pre-stretching tension for spandex yarn is mature, but the tension control for the other long fiber is still being explored. The actively fed long fiber device is currently more widely recognized.

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Double-core yarn is made from short fibers as the outer wrapping material, with two different types of long fibers as core yarns twisted together. Due to the different properties of the two core yarns, a strong complementarity is created, giving the yarn superior characteristics. For example, cotton-wrapped T400 + spandex. The characteristics of T400 are: good bulkiness.

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