Polyester staple fiber production process

Abstract

The invention relates to the technical field of regenerated polyester fiber production, and discloses a polyester staple fiber production process. The polyester staple fiber production process sequentially comprises the following steps of raw material pretreatment, material lifting to a dry material bin, spiral pushing, material melting, slurry fine filtration, spinning, yarn guiding into a barrel, transfer bundling, primary drafting, oil bath, secondary drafting, steam heating, tension heat setting, curling, fiber yarn setting, relaxation heat setting, and cutting and packaging. According tothe polyester staple fiber production process, a raw material is thoroughly dried, and moisture on the surface of the raw material and among raw material molecules is effectively removed, so that theraw material is close to native polyester, the spinnability of the raw material is improved, and the slurry is subjected to alcoholysis and tackifying treatment before the spinning, so that the tenacity of the spun fiber yarn is enhanced, the fiber yarn is not prone to being snapped, the quality of the fiber yarn is improved, the fiber yarns are oiled in the fiber slurry filamentation process, thetemperature of the fiber yarns is reduced, static electricity is removed, the fiber yarns are prevented from adhering to one another, and the problem that the fiber yarns are prone to being snapped is solved.

Description

technical field [0001] The invention relates to the technical field of regenerated polyester fiber production, in particular to a production process of polyester staple fiber. Background technique [0002] Polyester fiber, commonly known as "polyester". It is a synthetic fiber obtained by spinning polyester obtained by polycondensation of organic dibasic acid and dibasic alcohol, referred to as PET. [0003] Polyester staple fiber is made of polyester granules, after impurity removal, drying and moisture absorption, melt spinning, oiling and winding, balancing, clustering, stretching, crimping, loosening and shaping, cutting and packing into storage. Polyester staple fiber is widely used in high-end clothing, leather products, medical operations, military supplies, etc. due to its high strength, good durability, and good properties such as corrosion and mildew resistance. [0004] The production process in the prior art, such as the Chinese published patent (name: a polyes...

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Problems solved by technology

[0006] The drying of the raw materials is not complete, and the slurry is not thoroughly thickened after the raw materials are melted into the slurry, resulting in poor spinnability of the slurry. During the process of fiber slurry forming, the fiber filaments still have static electricity and high temperature. The problem of easy breaking, and the shaping stage is not refined enough

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