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Nylon glass fiber reinforced composite material and preparation method thereof

A technology for reinforcing composite materials and glass fibers, applied in the field of composite materials, can solve the problems of high material fluidity nylon dimensional stability requirements, reduced material mechanical properties, nylon mechanical properties, etc., to reduce moisture absorption rate and saturated water absorption content, The effect of improving appearance and improving fluidity

Pending Publication Date: 2022-01-04
NANJING JULONG SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of nylon is that it has a high water absorption rate. Due to the existence of a large number of amide groups and the low steric hindrance effect, it is easy to combine with water and hydrogen bonds to absorb water. After absorbing water, the mechanical properties of nylon decrease significantly.
In the prior art, a flow modifier is usually added to improve fluidity, but the addition of a flow modifier will reduce the mechanical properties of the material, especially in response to some thin-walled products, which require high material flow and dimensional stability of nylon

Method used

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  • Nylon glass fiber reinforced composite material and preparation method thereof
  • Nylon glass fiber reinforced composite material and preparation method thereof
  • Nylon glass fiber reinforced composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of nylon fiberglass reinforced composite material, comprises the following raw materials in parts by weight:

[0030] The resin intrinsic viscosity of PA66 is 2.2-2.8, 63.6 parts by weight;

[0031] Alkali-free and arsenic-free chopped glass fiber, the diameter of the glass fiber is 9-11um, the length is 3-4.5mm, 30 parts by weight;

[0032] Phenolic resin, molecular weight 500-1000, 5 parts by weight;

[0033] Auxiliary agent, 1.4 parts by weight;

[0034] The auxiliary agent is a compound of antioxidant 1098 and 168 with a weight ratio of 1:2:4, lubricant TAF, and carbon black masterbatch.

Embodiment 2

[0036] A kind of nylon fiberglass reinforced composite material, comprises the following raw materials in parts by weight:

[0037] The resin intrinsic viscosity of PA66 is 2.2-2.8, 63.6 parts by weight;

[0038] Alkali-free and arsenic-free chopped glass fiber, the diameter of the glass fiber is 9-11um, the length is 3-4.5mm, 30 parts by weight;

[0039] Phenolic resin, molecular weight 1500-4000, 10 parts by weight;

[0040] Auxiliary agent, 1.4 parts by weight;

[0041] The auxiliary agent is a compound of antioxidant 1098 and 168 with a weight ratio of 1:2:4, lubricant TAF, and carbon black masterbatch.

Embodiment 3

[0043] A kind of nylon fiberglass reinforced composite material, comprises the following raw materials in parts by weight:

[0044] The resin intrinsic viscosity of PA66 is 2.2-2.8, 63.6 parts by weight;

[0045] Alkali-free and arsenic-free chopped glass fiber, the diameter of the glass fiber is 9-11um, the length is 3-4.5mm, 30 parts by weight;

[0046] Phenolic resin, molecular weight 30000-40000, 10 parts by weight;

[0047] Auxiliary agent, 1.4 parts by weight;

[0048] The auxiliary agent is a compound of antioxidant 1098 and 168 with a weight ratio of 1:2:4, lubricant TAF, and carbon black masterbatch.

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Abstract

The invention discloses a nylon glass fiber reinforced composite material and a preparation method thereof. The composite material comprises, by weight, 40-70 parts of thermoplastic polyamide resin, 20-50 parts of glass fiber, 2-20 parts of phenolic resin and 1-2 parts of an auxiliary agent; and the glass fiber is alkali-free and arsenic-free chopped glass fiber, and the molecular weight of the phenolic resin is 500-1000000. The preparation method comprises the following steps: weighing raw materials; adding the thermoplastic polyamide resin, the phenolic resin and an auxiliary agent into a high-speed mixer, and uniformly mixing for 3-5 minutes; and adding the mixed raw materials into a double-screw extruder, adding the glass fiber under the conditions that the temperature is 230-280 DEG C and the screw rotation speed is 250-400 rpm, carrying out melt blending, and carrying out extrusion granulation. The composite material has the advantages of high fluidity, low moisture absorption, high mechanical strength and excellent aging resistance.

Description

technical field [0001] The invention belongs to the field of composite materials, and relates to a nylon glass fiber reinforced composite material and a preparation method thereof. Background technique [0002] As the automotive, electrical appliances, communications and other industries have increasingly strong requirements for high performance of products, especially in hot and humid environments, the requirements for dimensional stability, service life, heat resistance and aging resistance of materials are higher. [0003] As the first of the five major engineering plastics, nylon is widely used in automobile radiator cooling water tanks, electronic appliances, connectors and other components because of its strong, self-lubricating, heat-resistant and oil-resistant properties. Glass fiber reinforced nylon products have high mechanical strength, high rigidity, modulus, creep resistance and high and low temperature resistance, and can be used as high and low temperature str...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L61/06C08K7/14C08J5/04
CPCC08J5/043C08J2377/06C08J2461/06C08K7/14
Inventor 朱江陆体超刘曙阳
Owner NANJING JULONG SCI&TECH CO LTD
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