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A kind of sizing process of polyimide fiber

A technology of polyimide fiber and process, applied in the direction of fiber treatment, fiber type, wear-resistant fiber, etc., can solve the problems affecting the downstream product application of polyimide fiber, interface instability, fiber surface hairiness, etc. To achieve the effect of improving the ability of anti-ultraviolet, improving the surface performance and increasing the value

Active Publication Date: 2021-09-24
JIANGSU XIANNUO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The wide application prospects of high-strength and high-modulus polyimide fibers have promoted the upsurge of the development of domestic polyimide fibers, but there are various interface problems in the application process, such as the instability of the interface when it is combined with resin to make composite materials. Phenomenon, hairiness appears on the fiber surface during weaving fabric, these problems affect the application of downstream products of polyimide fiber

Method used

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  • A kind of sizing process of polyimide fiber

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Comparison scheme
Effect test

Embodiment 1

[0020] A polyimide fiber sizing process adopts a silicone wear-resistant sizing process, with 1500D polyimide fiber as the standard, and the specific process steps are as follows:

[0021] The fiber is put into the 6mol / L potassium hydroxide pretreatment solution from the wire drawing frame, and the surface of the fiber is etched in the potassium hydroxide pretreatment solution to modify it. The pretreatment time is 40s, and the pretreatment temperature is 30 ℃. Then enter the ultrasonic cleaning tank to clean the fiber until the cleaning solution is neutral. Then through the sizing tank, the silicone sizing agent used for weaving is used for sizing, wherein the concentration of the sizing agent is 1wt%, the sizing time is 10s, and the temperature of the solution during the sizing process is 30°C. Then it is filtered through the filter tank and then dried by microwave. The drying temperature is 220°C, the drying time is 120s, and finally it is wound up.

[0022] Technical ef...

Embodiment 2

[0024] A kind of polyimide fiber sizing process adopts the epoxy sizing process combined with epoxy resin, with 1500D polyimide fiber as the standard, the specific process steps are as follows:

[0025] The fiber is put into the 8mol / L sodium hydroxide pretreatment solution from the wire drawing rack, and the surface of the fiber is etched in the sodium hydroxide pretreatment solution to modify it. The pretreatment time is 40s, and the pretreatment temperature is 40 ℃.

[0026] Then enter the ultrasonic cleaning tank, clean the fibers until the cleaning solution is neutral, and then pass through the sizing tank, use epoxy sizing agent for sizing, wherein the sizing agent concentration is 1wt%, the sizing time is 20s, and the solution temperature during the sizing process is 35 °C. Then it is filtered through the filter tank and then dried by microwave. The drying temperature is 240°C, the drying time is 80s, and finally it is wound up.

[0027] Technical effect: After sizing,...

Embodiment 3

[0029] A polyimide fiber sizing process adopts a cluster sizing process, with 1500D polyimide fiber as the standard, and the specific process steps are as follows:

[0030] The fiber is drawn into the 2mol / L ammonia pretreatment solution from the drawing frame, and the surface of the fiber is etched in the ammonia pretreatment solution to modify it. The pretreatment time is 60s and the pretreatment temperature is 35°C. Then enter the ultrasonic cleaning tank, clean the fiber until the cleaning solution is neutral, and then pass through the sizing tank, use the cluster-type sizing agent PVA for sizing, where the sizing agent concentration is 1.5wt%, the sizing time is 30s, and the solution temperature during the sizing process is 50°C . Then it is filtered through the filter tank and then dried by microwave. The drying temperature is 80°C, the drying time is 300s, and finally it is wound up.

[0031] Technical effect: After sizing, the fiber bundles are gathered together to ac...

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Abstract

The invention provides a polyimide fiber sizing process. The sizing process includes spinning, pretreatment, ultrasonic cleaning, sizing, microwave drying and winding. The present invention changes the microscopic morphology of the polyimide fiber surface through the lye in the pretreatment tank, so that the imide bonds are partially opened, increasing the roughness and active groups on the fiber surface, and then utilizing the effective functional groups in the sizing agent to open The physical and chemical reaction of the imide bond will strengthen the interface bonding performance between the polyimide fiber and the sizing agent, and improve the value of the later application of the fiber.

Description

technical field [0001] The invention relates to a fiber sizing process, in particular to a polyimide fiber sizing process. Background technique [0002] Polyimide is a polymer material containing imide bonds in its molecule, and polyimide fiber is a form of polyimide material, and it is also one of the high-tech fiber materials since the 21st century. Aerospace, ships, automobiles, nuclear power, fire protection and other fields have a wide range of applications. The development of new materials often encounters various technical bottlenecks, and polyimide fibers are no exception. From the 1960s to 2015, polyimide fibers have been in a state of low strength and unstable performance. State, and the country attaches great importance to this new material, Jiangsu Xiannuo New Material Technology Co., Ltd. and Beijing University of Chemical Technology jointly researched in 2014, using the dope wet spinning technology to produce high-strength polyimide fibers with a strength of 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/38D06M15/643D06M15/55D06M11/60D06M15/333D06M13/00D06M101/30
CPCD06M11/38D06M11/60D06M13/00D06M15/333D06M15/55D06M15/643D06M2101/30D06M2200/25D06M2200/35D06M2200/40
Inventor 刘少飞牛鸿庆张梦颖韩恩林武德珍
Owner JIANGSU XIANNUO NEW MATERIAL TECH
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