A kind of production method of special polyester staple fiber for vortex spinning with hydrophilic moisture conduction

Abstract

A production method for hydrophilic moisture-transmitting polyester staple fibers specially used for vortex spinning is disclosed. The method adopts a continuous polyester production device for production. The method includes subjecting a hydrophilic modifying agent, terephthalic acid (PTA for short) and ethylene glycol (EG for short) to ternary copolymerization under action of a titanium catalyst to obtain hydrophilic polyester melt, increasing pressure through a booster pump, delivering directly through a melt pipe to a spinning device, metering through a metering pump, feeding the melt into a spinning box, spinning through a special-shaped section, performing after-treatment, mixing with common terylene according to a ratio, and chopping to obtain the staple fibers. The method allows hydrophobic polyester melt to be turned into the hydrophilic polyester melt and makes the polyester melt more environmental friendly and stabler. The produced polyester staple fibers specially used for vortex spinning has hydrophilic and moisture-transmitting functions, and can be used for manufacturing fabrics with permanent moisture-absorbing and quick-dry properties.

Description

technical field [0001] The invention relates to a method for manufacturing polyester staple fiber, in particular to a method for manufacturing polyester staple fiber which has a hydrophilic and moisture-conducting function and is specially used in a vortex spinning process. Background technique [0002] Vortex spinning has many advantages such as fast speed, high output, short process and high production rate. Since it was launched by Japanese Murata in the 1980s, it has developed rapidly. Theoretically, vortex spinning has wide adaptability, and can be used to process various high-fiber pure or blended yarns such as chemical fiber, viscose fiber, linen or cotton, but in fact, vortex spinning is not suitable for processing pure chemical fiber. It will encounter great troubles. Polyester is a rigid high polymer, and its molecular chain segments have poor mobility, high fiber modulus, low flexibility, and hard hand feeling. It is used as a raw material for eddy current spinnin...

AI Technical Summary

Problems solved by technology

However, the amount of catalyst added in the claim of the invention is 120-500ppm, which easily causes too many impurities in the polyester melt

[0006] Chinese patent CN1135494A patent uses oxidized polyolefin compound as hydrophilic modifier, and adds cross-linking agent to improve the degree of polymerization of its graft copolymerization, and then carries out composite spinning with other polyesters to achieve moisture absorption effect, and the polymerization of adding cross-linking agent It will cause disadvantages such as poor spinnability and poor fiber formability.

Images