Polyphenylene sulfide superfine fiber and preparation method thereof

Abstract

The invention provides a polyphenylene sulfide superfine fiber and a preparation method thereof. The preparation method comprises the steps of blending polyphenylene sulfide and polyolefin, preparing blended sea-island fiber by adopting a melt-blending method, thus obtaining the polyphenylene sulfide superfine fiber by taking an organic solvent as a stripping base phase. The method is simple to operate, the solvent can be recycled, polyphenylene sulfide in the blended sea-island fiber prepared by using the method is high proportion, the production efficiency is improved, and the prepared polyphenylene sulfide superfine fiber is high in degree of crystallinity.

Description

technical field [0001] The invention relates to the field of spinning, in particular to a preparation method of polyphenylene sulfide superfine fibers. Background technique [0002] Microfibers generally refer to fibers with a fineness of less than 0.3 denier (5 microns in diameter), which have excellent adsorption, softness, and comfort, and have been widely used in household wear, industrial production, and aerospace materials in modern life. [0003] At present, superfine fibers are mainly prepared by preparing blended sea-island fibers, but usually there are low crystallinity of fibers and a low proportion of dispersed phase in blended sea-island fibers, resulting in low yield of superfine fibers. At the same time, in the preparation of superfine fibers There are other defects in the process of fiber, such as Chinese patent CN103409847A, which discloses a preparation method of polyphenylene sulfide ultrafine fiber, which uses polyamide as the dispersed phase and polyphen...

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Problems solved by technology

[0003] At present, superfine fibers are mainly prepared by preparing blended sea-island fibers, but usually there are low crystallinity of fibers and a low proportion of dispersed phase in blended sea-island fibers, resulting in low yield of superfine fibers. At the same time, in the preparation of superfine fibers There are other defects in the process of fiber, such as Chinese patent CN103409847A, which discloses a preparation method of polyphenylene sulfide ultrafine fiber, which uses polyamide as the dispersed phase and polyphenylene sulfide to make a blend by melt spinning After the sea-island fiber, formic acid is used as a solvent to dissolve the dispersed phase polyamide, and finally polyphenylene sulfide ultrafine fibers are obtained, but this method has the following disadvantages: (1) formic acid itself is corrosive, and during the process of stripping the matrix phase polyamide, formic acid will affect the production Equipment causes corrosion, which is not conducive to equipment maintenance, accelerates equipment aging, and increases production costs; (2) Formic acid is highly volatile, and it is easy to cause a large amount of solvent volatilization during the process of stripping the matrix phase polyamide, which is difficult to control; (3) Formic acid is difficult to recycle. Utilization, resulting in waste of resources, environmental pollution, while increasing production costs

Another example is Chinese patent CN102345188A, which discloses a polymer alloy fiber and polyphenylene sulfide ultrafine fiber, and a method for preparing polyphenylene sulfide ultrafine fiber by blending polyphenylene sulfide with a soluble modified polyester polymer, but The cost of modified polyester is high, and the recycling rate is low, which increases the cost of industrialization

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