Two-step splitting method of polyester and polyamide composite super-fine fibers

Abstract

The invention discloses a two-step splitting method of polyester and polyamide composite super-fine fibers. The method comprises the steps that 1, the alkaline deweighting splitting step is conducted, wherein two large friction surface guide wheels of a liquid flow dyeing machine are coated with polyester and polyamide composite super-fine fiber cloth, and the splitting rate of the polyester and polyamide composite super-fine fiber cloth is made to reach a first preset value through splitting conducted at first splitting temperature, specified impact water pressure and guide wheel rotating speed within first time in a first splitting solution and an auxiliary; 2, the mechanical splitting step is conducted, wherein mechanical splitting is conducted on the polyester and polyamide composite super-fine fiber cloth which is subjected to alkaline deweighting splitting and arranged on the large friction surface guide wheels of the liquid flow dyeing machine at second splitting temperature and specified water flow impact speed, water temperature and guide wheel speed within second time in a second splitting solution and an auxiliary, and the splitting rate of the polyester and polyamide composite super-fine fiber cloth subjected to mechanical splitting is made to reach a second preset value. The two-step splitting method of the polyester and polyamide composite super-fine fibers has the advantages that a chemical and mechanical secondary splitting method is adopted, the influence of chemical agents on the physical property of the fibers can be reduced, and the alkaline deweighting quantity can be controlled in a lower range.

Description

technical field [0001] The invention relates to a fiber opening method, in particular to a two-step fiber opening method for polyester-nylon composite superfine fibers. Background technique [0002] Polyester-nylon composite is a composite fiber produced by composite spinning technology. Polyester-nylon composite fiber becomes superfine fiber after fiber opening. [0003] As the most basic requirement of the automatic production line reel cloth (polyester-nylon composite microfiber cloth) is: full fiber opening (usually when the fiber opening rate of polyester-nylon composite superfine fiber reaches 60%, it can be considered that the fiber opening meets the requirements); at the same time, There must be sufficient strength and thickness, as well as the winding resilience of the fabric, and the best flatness, so as to ensure the long-term stable operation of the cloth surface on the automatic wiping line. [0004] However, the fiber opening of the existing polyester / nylon co...

AI Technical Summary

Problems solved by technology

[0006] However, the greater the fiber opening, the greater the alkali loss, and the ultra-fine fibers continue to be hydrolyzed and become thinner, so the strength of the monofilament becomes smaller, the fiber stiffness (fiber breaking strength) decreases, and the thickness and grammage of the fabric also decrease. As a result, the fabric structure is loose, the winding resilience and flatness of the fabric are reduced, and the strength is also reduced.

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