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High-strength low-warpage nylon 66 composite material and preparation method thereof

A composite material and low warpage technology, applied in the field of nylon materials, can solve the problems of reducing the processing fluidity of nylon 66, product warping and deformation, and easy stress cracking, etc., achieve excellent dimensional stability, improve strength and rigidity, and improve comprehensive performance effect

Active Publication Date: 2020-07-10
BULL GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rigidity of glass fiber, adding a large amount of it will reduce the processing fluidity of nylon 66, and nylon 66 / glass fiber material is easy to generate large internal stress during molding, which will lead to warping and deformation of the product. prone to stress cracking

Method used

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  • High-strength low-warpage nylon 66 composite material and preparation method thereof
  • High-strength low-warpage nylon 66 composite material and preparation method thereof
  • High-strength low-warpage nylon 66 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The formula of the nylon 66 composite material in Example 1 is shown in Table 1.

[0038] The relative viscosity of nylon 66 resin is 2.7dL / g, and the model is EPR27.

[0039] The reinforcement is made by mixing talcum powder and micro-nanocellulose at a mass ratio of 4:1; wherein, the particle size of talc powder is 1200 mesh, and the model is KL-A208; the micro-nanocellulose is obtained by the following preparation method: bleaching paper The wood pulp was made into a 5wt% aqueous dispersion, pretreated with cellulase Novozym476 and hemicellulase HTec2 for 3 hours, refined in a homogenizer at a uniform speed for 4 times at a speed of 7000r / min, vacuum filtered, and then added The filter residue is washed with a mass ratio of ethanol, filtered by suction and dried to obtain micro-nano cellulose. The prepared micro-nanocellulose has an average length of 200 μm, an average diameter of 200 nm, and a degree of polymerization of 500.

[0040] The compatibilizer, the model...

Embodiment 2-3

[0044] The only difference between Example 2-3 and Example 1 is that the number of reinforcements and nylon 66 in Example 2-3 is different from Example 1, see Table 1, and the others are the same as Example 1.

Embodiment 4

[0046]The only difference between Example 4 and Example 1 is that the reinforcing body of Example 4 is made by mixing talc powder and micro-nanocellulose at a mass ratio of 5:1, and the others are the same as Example 1.

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Abstract

The invention belongs to the technical field of nylon materials, and relates to a high-strength low-warpage nylon 66 composite material and a preparation method thereof. The material comprises the following components by weight: 50-70 parts of nylon 66, 20-30 parts of a talcum powder and micro-nano cellulose mixture, 0.5-1 part of a compatilizer, 5-15 parts of a flame retardant, and 0.5-1 part ofan antioxidant. According to the invention, the talcum powder and micro-nano cellulose mixture is added into nylon 66, so that the strength and rigidity of the composite material are effectively improved, a low-warpage effect is achieved, and the composite material has good processability.

Description

technical field [0001] The invention belongs to the technical field of nylon materials, and relates to a high-strength and low-warpage nylon 66 composite material and a preparation method thereof. Background technique [0002] Nylon 66 is widely used in various fields because of its good mechanical properties, high temperature resistance and electrical insulation properties, and can be seen everywhere in industry and daily life. In order to improve the mechanical strength and rigidity of nylon 66, glass fibers are often used as reinforcing fillers. However, due to the rigidity of glass fiber, adding a large amount of it will reduce the processing fluidity of nylon 66, and nylon 66 / glass fiber material is easy to generate large internal stress during molding, which will lead to warping and deformation of the product. susceptible to stress cracking. [0003] Micro-nanocellulose is a new type of fiber with micro-nano scale, and its raw materials come from a wide range of sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L1/04C08K13/02C08K3/34C08K5/3492C08B15/02
CPCC08L77/06C08B15/02C08L1/04C08K13/02C08K3/34C08K5/34928
Inventor 秦强强申会员何洋樊绍彦陈泉孔德玉
Owner BULL GRP CO LTD
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