Copolymerized polyphenylene sulfide composite fiber manufacture method

Abstract

The invention discloses a process for preparing copolyether polyphenylene sulfide composite fiber, raw materials use copolyether polyphenylene sulfide resins which are 80-100 percent by weight, polyester resins which are 5-0 percent by weight, and polyetheretherketone which is 15-0 percent by weight are used in a resin premixed compound treatment. After being stirred and mixed in a high speed, the raw materials are extruded by an extruder, and compound resin resins are obtained, and the weight average molecular weight of polyphenylene sulfide copolymer resin is 40-50 thousand. A spinning extruder has eight temperature ranges, a first range is 150 DEG C, a second range is 300 DGE C, a third range is 315 DGE C, a forth range is 330 DGE C, a fifth range is 330 DGE C, a sixth range is 315 DGE C, a seventh range is 300 DGE C, and an eighth range is 300 DEG C. The holding temperature of a spinning box is 325 DEG C, the crystal curing temperature is controlled at 256 DEG, the drafting rate of strand silk is 6-6.8 times, the roll-up speed of raw silk is 2300-2600 m / min, and the temperature range of crystal curing of the strand silk is 480-510m. The fracture strength of the manufactured copolyether polyphenylene sulfide composite fiber is 7.3 cm / dtex, and the average limited oxygen index is bigger than 47.

Description

Technical field [0001] The invention belongs to the field of manufacturing special fibers, in particular to a method for manufacturing fiber-level copolymerized polyphenylene sulfide composite 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 t...

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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 performance intensity is also unclear; above The patents all use fiber-grade polyphenylene sulfide resin for melt spinning, and domestic and foreign literatures do not use polyphenylene sulfide copolymers for spinning, and their copolymers are all used for injection molding, extrusion molding or film in the complex

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