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A kind of surface treatment method of aramid fiber III

A technology of surface treatment and surface treatment agent, applied in the direction of fiber treatment, fiber type, textile and papermaking, etc., can solve the problems of complicated preparation of surface treatment agent, easy loss of thread strength and insignificant treatment effect, etc. Simple and effective to improve interlaminar shear strength

Active Publication Date: 2011-12-07
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plasma treatment technology is currently the most researched method in aramid fiber surface modification technology. Although the fiber surface modification technology by plasma treatment has the advantages of simplicity and practicality, the treatment effect will decay with time and cannot be stored for a long time. ;Other physical methods have disadvantages such as not being easy to be continuous on-line and easy to lose thread strength; although the existing chemical methods are easy to realize on-line continuous treatment, most of the surface treatment agents used are complicated to prepare and the treatment effect is not obvious

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Surface treatment of aramid III:

[0026] A. Preparation of surface treatment agent: Add 30 grams of 1,4-butanediisocyanate to 1000 grams of isopropanol to form a 2.9% isopropanol solution of 1,4-butanediisocyanate, and stir evenly .

[0027] B. Surface treatment: Continuously pass the aramid III tow at a speed of 10m / min through a U-shaped small groove with a nozzle hole at the bottom, and the surface treatment agent described in step A of continuous constant pressure is sprayed out in the nozzle hole, and Submerged aramid.

[0028] C. Drying: The tow after passing the surface treatment agent is dried by hot roller contact drying and blast drying at a drying temperature of 90°C for 3 minutes.

Embodiment 2

[0030] Surface treatment of aramid III:

[0031] A. Preparation of surface treatment agent: Add 30 grams of 1,6-hexamethylene diisocyanate to 1000 grams of isopropanol to form a 2.9% isopropanol solution of 1,6-hexamethylene diisocyanate, and stir evenly .

[0032] B. Surface treatment: Continuously pass the aramid III tow at a speed of 10m / min through a U-shaped small groove with a nozzle hole at the bottom, and the surface treatment agent described in step A of continuous constant pressure is sprayed out in the nozzle hole, and Submerged aramid.

[0033] C. Drying: The tow after passing the surface treatment agent is dried by hot roller contact drying and blast drying at a drying temperature of 90°C for 3 minutes.

Embodiment 3

[0035] Surface treatment of aramid III:

[0036] A. Preparation of surface treatment agent: 22 grams of 1,4-butanediol diglycidyl ether are added to 978 grams of isopropanol to form 1,4-butanediol diglycidyl ether with a mass fraction of 2.2%. isopropanol solution, stir well.

[0037] B. Surface treatment: Continuously pass the aramid III tow at a speed of 10m / min through a U-shaped small groove with a nozzle hole at the bottom, and the surface treatment agent described in step A of continuous constant pressure is sprayed out in the nozzle hole, and Submerged aramid.

[0038] C. Drying: The tow after passing the surface treatment agent is dried by hot roller contact drying and blast drying at a drying temperature of 95°C for 3 minutes.

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Abstract

The invention provides a method for surface treatment of aramid fiber III, which comprises the steps of preparing a surface treatment agent, surface treatment, drying and the like. The method provided by the invention can improve the softness of the aramid fiber III, improve the hand feel, reduce the strength loss caused by bending and other factors in the subsequent operation process, and more importantly, can improve the surface polarity of the aramid fiber III fiber, thereby improving The interfacial bonding performance of the aramid III / epoxy composite material, and then improve the interlaminar shear strength of the aramid fiber III / epoxy composite material, reaching 45-55Mpa. Moreover, the method is simple and safe to operate, the solvent can be recycled and used, and it is easy to realize online continuous processing; the performance does not decay, and after the treated aramid fiber is placed for a long period of time, the aramid fiber III / epoxy resin made and the freshly treated aramid fiber Aramid III / epoxy has the same shear strength.

Description

technical field [0001] The present invention relates to a surface treatment method, more specifically, the present invention relates to a surface treatment method of aramid fiber III. Background technique [0002] As a high-strength and high-modulus organic fiber, aramid has been widely used in many fields due to its excellent comprehensive properties. Aramid III is a modified aramid with a heterocyclic structure in its molecular chain, so it is also called heterocyclic aramid. Heterocyclic aramid fiber has better mechanical properties than para-aramid fiber (aramid 1414). For example, the tensile strength and tensile modulus of Russian heterocyclic aramid fiber Apmoc are higher than those of para-aramid fiber Kevlar- 49 were 38% and 20% higher. Therefore, heterocyclic aramid fiber is gradually becoming the preferred structural material for aerospace and military industries. Its winding reinforced epoxy composite material is an ideal material for solid rocket motor shells,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/395D06M13/11D06M15/55D06M101/36
Inventor 王凤德彭涛陈超峰彭开云
Owner CHINA BLUESTAR CHENGRAND CO LTD
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