Method for manufacturing polyphenylene sulfide meltblown fiber products

Abstract

The invention discloses a method for manufacturing polyphenylene sulfide meltblown fiber products, which is characterized in that polyphenylene sulfide resin meltblown fibers are used as the raw materials, undergo resin premixing and are melted, pelletized, chipped, melted, extruded and blown by a double-screw extruder after high-speed stirring and mixing and then are cut by 30-40MPa of high pressure nitrogen to obtain polyphenylene sulfide meltblown short fibers which are rapidly cooled by the nitrogen at 8-10 DEG C; and in the process of resin premixing, 98.5-99.5% of polyphenylene sulfide resins with weight-average molecular weight between 50 thousand and 60 thousand and molecular weight distribution coefficient between 1.8 and 19, and 0.5-1.5% of antistatic agents are employed. The polyphenylene sulfide meltblown fibers, non-woven fabrics and fiber paper manufactured by the invention are widely used in such high technology fields as environmental protection, electronics, aviation and the like.

Description

Technical field [0001] The invention belongs to the field of manufacturing special fibers, in particular to a method for manufacturing fiber-grade polyphenylene sulfide meltblown fibers. Background technique [0002] Polyphenylene sulfide has excellent chemical resistance and thermal stability at high temperature, and has flame retardancy, insulation, radiation resistance and good mechanical properties; in order to expand the scope of use of this material, researchers from various countries have been looking for A new approach to fibrosis. [0003] Disclosed in Chinese patent CN1603477 is a kind of method of melt spinning and stretching heat setting of linear high molecular weight polyphenylene sulfide fiber grade resin; Chinese patent CN1876906 discloses the manufacture method of polyphenylene sulfide long fiber; The method of polyphenylene sulfide fiber obtained by melting polyphenylene sulfide resin is introduced in . The disadvantage of these methods is that the mechan...

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Problems solved by technology

The disadvantage of these methods is that the mechanical strength of the product fiber is still not high enough. Although US5405695 divides the heating zone of the melting-filament extruder into three zones, it is only possible to produce long fibers, and its mechanical properties are also unclear; the above patents Both use fiber-grade polyphenylene sulfide resin for melt spinning, and domestic and foreign literatures do not use polyphenylene sulfide for melt-blown spinning, which are all melt-blown fibers for injection molding, extrusion molding or film among things

[0004] In the current invention patents of various countries, there is no literature on polyphenylene sulfide melt-blown fibers, and the raw materials of melt-blown fibers are mainly polypropylene, polyethylene, polypropylene cyanide, etc.

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