A kind of anti-pilling polyester staple fiber

Abstract

The invention provides anti-pilling polyesteramide short fiber. Modified polyesteramide is taken as a raw material and is subjected to melt conveying for preparing precursor fiber, and the precursor fiber is subjected to drafting, crimping and cutting off to obtain short fiber with specific length; in the preparation process, the spinning temperature is 260-290 DEG C, the quenching wind speed is 0.8-1.3 m / s, the wind temperature is 17-23 DEG C, and the drafting multiplying power is 2.0-3.2; and the modified polyesteramide is obtained by firstly performing esterification reaction on 100 parts of terephthalic acid and 40-80 parts of glycol to obtain ethyleneglycol terephthalate and continuing to perform condensation polymerization on ethyleneglycol terephthalate and 5-30 parts of aliphatic polyamide in the presence of additives A, B and C. A third monomer nylon is introduced under the effects of three stable additives, and by combining with specific technological control parameters, the short fiber with the strength of 1.80-2.80 cN / dtex is developed, and the short fiber can be used to prepare fabrics with the function of resisting pilling.

Description

technical field [0001] The invention belongs to the technical field of synthetic fiber production, and in particular relates to a preparation method for producing anti-pilling short fibers using novel polyesteramide as a raw material. Background technique [0002] Fabric pilling is a gradual process, usually manifested in three steps: pilling - entanglement - pilling - pilling off. When the external friction force of the fabric is greater than the fiber strength or the friction or cohesion between the fibers, the fiber ends are pulled out to form loops and fluff, and fluff is formed on the surface of the fabric, which is called fluff; Due to rubbing and friction at a certain distance, it is tangled into a ball due to repeated elongation and retraction. The resulting hair ball is not large and does not form a dead knot. One end of it is in the fiber of the fabric and connected to the cloth surface to form a ball. It's called pilling. When the fabric continues to be rubbed, ...

AI Technical Summary

Problems solved by technology

[0005] At present, the preparation of anti-pilling short fibers by general modified polyesteramide has the following disadvantages: (1) The ratio of the third monomer nylon and stabilizer in the polyesteramide copolyester is different, the thermal stability of the melt, The rheological properties are different, which directly affect the spinning process and the performance index of the fiber; (2) Polyamide ester copolyester degrades at high temperature, the macromolecules break, and generate small molecules with a certain odor containing amide bonds. Escape from the melt or fiber at a high degree, affecting the processing of the melt and fiber

High melt delivery temperature is not conducive to controlling degradation, too low temperature, increased viscoelasticity, and poor spinnability

Polyamide ester copolyesters of different formulations correspond to appropriate control ranges; (3) The stretchability of polyester fibers is poor, and the distribution of the two stretch ratios and the stretching temperature directly control the fiber crystallization and orientation properties. Affects the strength and elongation at break of fibers

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