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Method for treating carbon fiber bundle

A processing method, carbon fiber bundle technology, applied in fiber processing, carbon fiber, fiber type, etc., can solve problems such as poor temperature control, poor accuracy of actual temperature control, and excellent hardness

Pending Publication Date: 2022-02-25
FORMOSA PLASTICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is worth noting that the actual temperature control accuracy of the traditional hot air heating and drying equipment is not good, only the removal of water is required, so it is easy to cause the crystallization problem of this type of sizing agent
Some other factors during processing, such as line speed, extrusion roller pressure, tow tension, slurry content, sizing tank concentration, changes in external environment temperature and humidity, etc. may also cause changes in the moisture content of carbon fiber bundles before and after drying, making the The actual temperature of the surface of the carbon fiber bundle changes during hot air drying, resulting in poor temperature control and crystallization of the sizing agent to varying degrees, resulting in problems with the carbon fiber bundle being too hard and subsequent winding, which is not conducive to the quality control and subsequent processing of the carbon fiber bundle
[0009] The purpose of the present invention is to solve the above-mentioned problems in the prior art, and provide a method for manufacturing carbon fiber bundles, in which after drying the carbon fibers with hot air, it is further combined with precise infrared heat treatment to solve the carbon fiber hairiness and excessive hardness caused by the crystallization of the sizing agent of the carbon fibers. Phenomenon, improve the problem of carbon fiber entanglement and fluff caused by excessive film-forming property of sizing agent, so as to precisely control the stiffness and clustering of carbon fiber

Method used

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  • Method for treating carbon fiber bundle
  • Method for treating carbon fiber bundle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1: The desized carbon fiber bundle was lowered to 800 cN at a linear speed of 1.0 m / min, immersed in A slurry with a concentration of 3.2% for about 36 seconds, and excess sizing agent and water were removed through a squeeze wheel. Dry in an oven at 120°C for 3 minutes; then treat with an infrared heater at 100°C for 0.9 minutes. The obtained carbon fiber bundles can be bundled, have good hairiness, and have a stiffness of 90g.

Embodiment 2

[0038] Example 2: Desized carbon fiber bundles were immersed in A slurry with a concentration of 3.2% for about 36 seconds at a linear speed of 1.0 m / min and a sizing tension of 800 cN, and excess sizing agent and water were removed through a squeeze wheel. Dry in an oven at 120°C for 3 minutes, and then treat with an infrared heater at 90°C for 0.9 minutes. The obtained carbon fiber bundles had good bundling properties, good hairiness, and stiffness of 84 g.

Embodiment 3

[0039] Example 3: The desized carbon fiber bundles were immersed in A slurry with a concentration of 3.2% for about 36 seconds at a linear speed of 1.0 m / min and a sizing tension of 1000 cN, and excess sizing agent and water were removed through a squeeze wheel. Dry in an oven at 100°C for 3 minutes, and then treat with an infrared heater at 100°C for 0.9 minutes. The obtained carbon fiber bundles can be bundled, have good hairiness, and have a stiffness of 91 g.

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Abstract

The invention relates to a method for treating a carbon fiber bundle, which can adjust the proper bundling property, rolling property and wear resistance of sizing fibers. The method comprises the following steps of (i) applying a sizing agent on at least one carbon fiber bundle, wherein the sizing agent comprises a thermoplastic resin; (ii) drying the carbon fiber bundle with hot air; and (iii) heating the carbon fiber bundle with infrared rays, wherein the heating temperature of the infrared heating is equal to or higher than the melting point of the thermoplastic resin.

Description

technical field [0001] The invention relates to a method for processing carbon fiber bundles. Background technique [0002] The current continuous fiber reinforced thermoplastic composites (CFRTP) are mainly composed of carbon fiber and thermoplastic resin, and its advantages include rapid production and manufacturing, diverse processing and molding, recyclable reuse, low process energy consumption, etc. , quite in line with the current trend of environmental protection. [0003] Carbon fiber has excellent mechanical properties such as high specific strength and high specific modulus, high temperature resistance, chemical resistance, low friction coefficient and high electrical conductivity, so carbon fiber is widely used in composite materials such as aviation, aerospace, sporting goods, civil construction , electronic products, medical equipment, etc. However, before the production and processing of carbon fiber, it is necessary to sizing the carbon fiber, such as wettin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/227C08J5/06D06M101/40
CPCD06M15/227C08J5/06D06M2101/40D06M2200/40D06M15/21D06M15/263D06M23/00C08K9/08C08J2300/00D06M10/10B05D2256/00
Inventor 黄龙田林盛勋李育昇钟净成周政均
Owner FORMOSA PLASTICS CORP