Equipment and process for producing high-performance polyphenylene sulfide fine-denier fiber

Abstract

The invention discloses equipment and a process for producing high-performance polyphenylene sulfide fine-denier fiber. The equipment comprises a drying system, a screw extruder, a filter, a spinning machine and a cooling device which are connected sequentially, wherein the drying system comprises a drying machine; a gas purification processor, a gas dehumidification processor, a fan and a heater are sequentially connected through gas delivery pipes in a sealed manner between a gas outlet and a gas inlet of the drying machine; the draw ratio of a screw rod of the screw extruder ranges from 26 to 32; the depth of a screw groove at the tail end of the metering section of the screw rod is 3 to 5 mm; an annular spinneret plate is mounted at the lower end of the spinning machine; and a plurality of concentric annular flow guide grooves and radial communicated flow guide grooves are formed in the annular spinneret plate. The process comprises the steps of selecting materials, drying, fusing, jetting silk, cooling and the like. According to the equipment and the process, the structures of a plurality of parts are improved; process steps and parameters are optimized; the produced polyphenylene sulfide fine-denier fiber has high quality stability; the qualified rate of products is high; and according to detection, the polyphenylene sulfide fine-denier fiber reaches or even exceeds the industrial standard and import products in multiple performance parameters.

Description

technical field [0001] The invention relates to a polyphenylene sulfide fiber production equipment, in particular to a polyphenylene sulfide fine-denier fiber production equipment, and also relates to a process for producing polyphenylene sulfide fine-denier fibers using the equipment. Background technique [0002] Polyphenylene sulfide fiber is a new type of special fiber, which is made of polyphenylene sulfide resin (PPS) by conventional melt spinning method, and then stretched, crimped and cut at high temperature. Its short fiber has excellent thermal stability and flame retardancy, its chemical resistance is second only to polytetrafluoroethylene fiber, and it has better textile processing performance. The products are mainly used for the filtration of high temperature flue gas and special heat medium, the drying belt of the paper industry, the cable covering layer and the fireproof fabric, etc. [0003] Polyphenylene sulfide fiber is an important variety in the develop...

AI Technical Summary

Problems solved by technology

At present, domestic conventional varieties of polyphenylene sulfide fiber (above linear density 2.2dtex) can basically be self-sufficient, but polyphenylene sulfide fine denier fiber (linear density below 2.0dtex) can only rely on foreign imports, and domestic production is still not possible. The main reason is that The equipment and process requirements for the production of polyphenylene sulfide fine denier fibers are relatively high

[0004] At present, due to the performance limitations of the drying system, screw extruder, spinneret, cooling device and other components of the domestic production of polyphenylene sulfide fiber, it is difficult to produce polyphenylene sulfide fine denier fiber, or its strength, elongation, etc. Long rate and other technical indicators are difficult to meet the requirements

Images