Production method of polyester staple fiber for jet vortex spinning process

Abstract

The invention discloses a production method of a polyester staple fiber for a jet vortex spinning process, comprising the steps of obtaining a general polyester tow and a special polyester tow by using a conventional spinning and post treatment process and then combining the general polyester tow with the special polyester tow according to the proportion and cutting off to obtain a mixed staple fiber of the general polyester tow and the special polyester with the same length. The combining proportion is counted according to the number; special polyester accounts for 5-15 percent of the total weight; the section of the general polyester staple fiber is circular; the section of the special polyester staple fiber is crisscross and / or trifoliate; and the filament ratio of the general polyester staple fiber to the special polyester staple fiber is 1.0:1.0-1.4. When the polyester staple fiber is subjected to pure spinning by using an MVS (Jet Vortex Spinning) process, oiling agent scaling matter on a vortex tube, a spindle and other main parts in spinning equipment are remarkably reduced, the defect that the soft twist is easy to be generated in the yarn forming process can be effectively overcome, the cleaning period of main spinning parts is prolonged and the production efficiency for spinning is greatly improved.

Description

technical field [0001] The invention relates to a method for manufacturing polyester staple fibers, in particular to a method for manufacturing polyester staple fibers specially used in the air-jet vortex spinning process. Background technique [0002] Air-jet vortex spinning (MVS) is a new generation of spinning technology developed on the basis of traditional air-jet spinning (MJS). When MVS is spinning, the sliver is sucked into the vortex tube by the negative-pressure airflow, and the fiber rotates at high speed in the tube. The vortex twisting of the free end is realized under the action of the airflow. MVS has many advantages such as fast speed, high output, short process and high production rate. Although both MVS yarn and MJS yarn have a double-layer structure of core fiber and wrapping fiber, the yarn forming mechanism of MVS determines that the fiber can be tightly wrapped. Twisting, MVS yarn has a much higher proportion of outsourcing fibers, but the amount of ha...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for manufacturing polyester staple fibers used in an air-jet vortex spinning process. The technical problem to be solved is that when the obtained polyester staple fibers are processed during spinning, spinning equipment such as vortex tubes, spindles, etc. Less prone to formation of oil fouling on components, thereby reducing the possibility of weak twist in the finished yarn

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