A kind of polyester-spandex double core-spun yarn and fabric thereof

Abstract

The invention discloses a polyester-spandex double core-spun yarn, which comprises a core yarn and an outer fiber. The core yarn is composed of elastic polyester fiber and spandex yarn which are polymerized from polyterephthalic acid and 1,3-propylene glycol ester; The outsourcing fibers are natural fibers or chemical fibers; the mass percentages of the elastic polyester fibers, spandex yarns and outsourcing fibers are 3-9%: 2-8%: 84-94%. Two rovings made of outsourcing fibers are fed into the bell mouth in parallel, and the elastic polyester fiber is introduced into the godet wheel through the tension adjustment device, and the tension value is controlled at 28-30CN. Drafting, after the godet roll and elastic polyester fiber meet, it is fed into the nip of the front roller, merged with the outsourcing fiber, and forms a core-spun yarn under the twisting action of the spinning frame. The invention adopts the elastic polyester fiber and the spandex yarn to prepare the double core-spun yarn, which combines the good elasticity of the spandex yarn and the excellent recovery of the polyester yarn, and the fabric made is comfortable to wear and can keep shape for a long time.

Description

technical field [0001] The invention relates to a core-spun yarn, in particular to a polyester-spandex double-core-spun yarn, and also to a fabric woven from the double-core-spun yarn, which belongs to the technical field of textile engineering. Background technique [0002] Core-spun yarn is generally a yarn made of synthetic fiber filaments with good strength and elasticity as the core yarn, and short fibers such as cotton, wool, and viscose fibers are twisted and spun together. The core-spun yarn combines the excellent properties of the filament core yarn and the outer staple fiber. The more common core-spun yarn is polyester-cotton core-spun yarn, which uses polyester filament as the core yarn and is covered with cotton fibers. There is also spandex core-spun yarn, which is a yarn made of spandex filament as the core yarn and outsourced with other fibers. Knitted fabrics or jeans made of this core-spun yarn stretch and fit comfortably when worn. [0003] PTT fiber (co...

AI Technical Summary

Problems solved by technology

[0004] Spandex is an elastic fiber. Spandex has high elongation (500% to 700%), low elastic modulus (200% elongation, 0.04 to 0.12 g / denier) and high elastic recovery rate (200% elongation, 95% ~99%), generally spandex is not used alone, spandex core-spun yarn is made by outsourcing other short fibers or filaments in spandex filament, the fabric spun from spandex core-spun yarn has good elasticity and is comfortable to wear, but the fabric with better elasticity Its elastic residual rate and shrinkage rate will also increase, and the weather resistance and temperature resistance of spandex fiber are poor. The fabric will lose its elasticity when worn for a long time or even stored for a long time, resulting in loose deformation.

[0005] In view of this, it is necessary to provide an elastic yarn with good elasticity and dimensional stability, and a spandex core-spun yarn that is not easy to relax and deform after being placed for a long time. Therefore, the excellent elongation recovery of PTT fiber can be considered to improve the spandex core-spun yarn. Defects of relaxation deformation

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