A kind of high flexibility environment-friendly staple fiber and preparation method thereof

Abstract

The invention discloses high-flexibility environmentally-friendly short fiber and a preparation method thereof, and the short fiber with the fiber modulus of 35-48CN / dtex and the fineness of 0.8dtex-8.0dtex is obtained by direct spinning of polyester synthesized by a titanium-containing catalyst. Compared with a conventional process, the polyester short fiber is produced by the titanium-containing catalyst, while maintaining of constant original indexes of the product, spinning temperature is reduced, improvement of adhesion between a polyester melt and a spinneret plate capillary pore tube wall is facilitated, melt slippage on the wall can be avoided, unstable melt flow is induced, melt fracture is caused, and spinning hard wires and pulp bolts are generated. At the same time, aiming at a titanium melt, the spinning speed and the draw ratio are optimized to reduce the fiber modulus, production is normal, finished fiber is soft and plump in hand feeling, and fiber flexibility is further improved.

Description

technical field

[0001] The invention relates to the technical field of synthetic fiber production, in particular to a polyester fiber and a preparation method thereof. Background technique

[0002] With the continuous improvement of people's living standards and concerns about the environment, environmentally friendly short fibers are becoming more and more popular. In the traditional fiber production process, it is necessary to add a catalyst containing heavy metal antimony when producing polyester, and the use of this catalyst is easy to cause pollution to the environment. At present, relevant patents have disclosed the method of producing polyester with titanium-based catalysts, for example: the Chinese patent "Catalyst for the production of polyester" with the authorized announcement number CN100567364C, the Chinese patent "used for the production of polyester" with the authorized announcement number CN100586982C Titanium Catalyst for Esters", the Chinese patent "Titani...

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