A low-shrinkage high-strength PPS fiber heat setting method and device

By using a multi-stage stepped heat setting method and apparatus, the problems of shrinkage and strength reduction of PPS fibers at high temperatures were solved, and the preparation of low-shrinkage and high-strength PPS fibers was achieved, thereby improving the performance of filter materials.

CN116411373BActive Publication Date: 2026-07-21WUXI JINTONG CHEM FIBER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUXI JINTONG CHEM FIBER
Filing Date
2023-04-25
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

PPS fibers shrink when heated at high temperatures, which reduces their strength and affects their filtration performance.

Method used

A multi-stage stepped heat setting method and device are adopted, which uses multiple hot rollers to gradually heat and set the fibers, combined with nitrogen protection to prevent oxidation, thus forming low-shrinkage and high-strength PPS fibers.

Benefits of technology

It reduces the dry heat shrinkage rate of PPS fibers, increases fiber strength, and ensures the stability of filtration performance.

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Abstract

The application provides a low-shrinkage high-strength PPS fiber heat setting method, and relates to the technical field of fiber preparation, and comprises the following steps: adding pretreated PPS chips into a screw extruder, preparing uniform PSS melt through melt treatment of the screw extruder; sending the PSS melt to a spinning box for spinning, cooling and solidifying to obtain nascent fibers after being sprayed out of a spinning hole; preheating the nascent fibers and sending them into a spinning and drawing machine for drawing and heat setting to obtain primary filaments; and sending the primary filaments into a multi-roller area, fully heating and setting the primary filaments to form final filaments through the tension of multiple hot rollers without drawing. The application can solve the problems of shrinkage and strength reduction of PPS fiber products after long-time heating, and has the beneficial effects of reducing the dry heat shrinkage rate of PPS fiber and improving the strength of PPS fiber.
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