Polyphenylene sulfide fiber spinning technology

Abstract

The invention relates to a polyphenylene sulfide fiber spinning technology which comprises the steps as follows: (1) pre-processing materials: mixing graphite powder with a silane coupling agent to obtain modified graphite, and mixing the modified graphite and polyphenylene sulfide resin at a high speed so as to obtain a mixture, and finally pre-crystallizing and drying the mixture in a vacuum drying box to obtain dried powder with less than 50 ppm of water; (2) melting and spinning: feeding the dried powder into a double-screw extruder for melting and spinning so as to obtain a melt; (3) slowly cooling and cooling: thermally forming the smelt after forming silk through a spinneret plate, and then transferring to a slow cooling area, and finally transferring to a cooling area to solidify and form; and (4) drafting and finalizing: carrying out oil applying and silk guiding on the solidified and finalized fiber, and then drafting and finalizing at three times so as to obtain the short fiber with the linear density of 11 dte x. The polyphenylene sulfide fiber spinning technology is low in cost and easy in industrial production; and the fiber material prepared via the technology has good performance.

Description

technical field [0001] The invention relates to the technical field of special chemical fibers, in particular to a polyphenylene sulfide fiber spinning process. Background technique [0002] The research and development of polyphenylene sulfide fiber (that is, PPS fiber) abroad was first developed in the United States, Japan and some developed countries in Western Europe, and then PPS fiber products such as Toyobo’s Procon, Toray’s Torcon and Celanese’s Fortron came out one after another. At the beginning of the 21st century, Toray Corporation of Japan acquired the PPS fiber division of Phillips Corporation of the United States, making the Japanese company the largest PPS fiber producer in the world. Although there are many foreign PPS manufacturers, due to the high difficulty of the production process, after several mergers and closures of related manufacturers, the entire PPS fiber production technology is almost in the hands of a few manufacturers such as AFY and AmocoF&f...

AI Technical Summary

Problems solved by technology

In response to this, a lot of manpower and material resources have been invested in the development of PPS fibers at home and abroad. However, in the past, the development of PPS fibers only focused on process development. Using pure PPS as the spinning material, the material performance cannot be improved, resulting in restrictions on the spinning process. , product performance cannot be improved

In recent years, some PPS blending and modifying methods for preparing high-performance fibers have emerged. These methods have made great progress compared with the past, but most of them use simple physical blending methods, which are rough and simple. The process is complicated, and the product performance is not improved much.

[0006] In the past, the spinning process of polyphenylene sulfide staple fiber used the spinning two-step staple fiber production process, but because of its high energy consumption, high processing cost, low efficiency, and the quality of the produced polyphenylene sulfide staple fiber is uniform Shenzhen Zhongsheng Fiber Engineering Technology Co., Ltd. has developed a one-step complete set of equipment and production method for polyphenylene sulfide staple fiber (application number: 200710124608.5, application date: 2007.11.19)