Production technique of three-dimensional curly hollow polyester staple fibers

Abstract

The invention discloses a production technique of three-dimensional curly hollow polyester staple fibers, wherein the production technique comprises the steps of: utilizing regenerative PET material as raw material; sequentially performing the following procedures to obtain a finished product: pre-treating, drum drying, melting spinning, cooling forming, winding, stretching, curling, oiling, cutting and heat setting, wherein the drum drying duration is 9.5-10.5 h, a spinneret plate in the melting spinning procedure is three-dimensional hollow helical, the cross section of a spinneret orifice is a sealed space formed by sealing the circular arcs of two concentric circles, the temperatures of the threaded rod of a threaded rod extruding machine and the box body of a spinning box are 265-275 DEG C; a circular air blowing asymmetrical cooling forming mode is utilized, the circular blowing blast temperature is 20-24 DEG C, and the circular blowing wind speed is 4.7-5.7 m / s; the total stretching fold is 2.5-2.7 folds, the main curling pressure of a curling wheel is 0.05-0.1 MPa, and no backpressure exists; the heat setting temperature is 175-180 DEG C, and the heat setting duration is 10-14 min. The production technique of the invention has the advantages of saving the cost and protecting the environment, and the prepared finished product not only has good three-dimensional configuration and bulkiness, but also has better thermal stability.

Description

technical field [0001] The invention relates to a production process of polyester staple fiber, in particular to a production process of three-dimensional crimped hollow polyester staple fiber. Background technique [0002] Polyester (that is, polyester fiber) is an important variety of synthetic fibers, and it is an important textile raw material. The polyester staple fiber obtained by crimping polyester has good heat retention and high cost performance, and is suitable for filling materials such as bedding, defensive clothing, toys, and clothing cloth. [0003] However, the polyester staple fiber produced by the traditional production process is curled by the traditional mechanical crimping method, and has only a two-dimensional zigzag crimp. It has no inherent crimping characteristics, and the crimping fastness is poor. It cannot fully adapt to the requirements of wadding fiber filling materials and special wool-like products. [0004] The three-dimensional crimped holl...

AI Technical Summary

Problems solved by technology

However, due to the uneven quality of recycled PET materials, their intrinsic viscosity and melting point are very different from those of polyester chips processed from raw materials, and they also contain more non-polyester plastic impurities and moisture, resulting in poor spinning quality. Serious impact

[0006] Limited by the production process, although the three-dimensional crimped hollow polyester fiber currently on the market has good compression resilience, its thermal stability is not good. After high-temperature dyeing or heat setting treatment in post-processing, its crimp effect will become worse

[0007] In addition, the current three-dimensional crimped hollow polyester fiber has a single function, and it is easier to breed bacteria, leading to the spread of diseases