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A metal-plastic double-layer combination and its preparation method

A joint and plastic technology, applied in the direction of coating, etc., can solve the problems of poor thermal conductivity, no mention of thermal conductivity of joints, no mention of thermal conductivity of metal and plastic joints, etc., to achieve good thermal conductivity, good Interface strength, effect of improving binding force

Active Publication Date: 2020-09-01
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, there are few studies on the thermal conductivity of metal-plastic composite structures, and metal-plastic composite structures generally have the problem of poor thermal conductivity
For example, CN101578018A discloses that the metal body is used as an insert and molded by injecting molten plastic after cooling. The material of the plastic part is selected from liquid crystal polymers, polyphenylene sulfide, and polybutylene terephthalate. To the thermal conductivity of the bonding parts; CN201726613U discloses that the plastic part is used as the shell, and the inner surface of the plastic part has an adhesive layer, and the metal film layer is sprayed with powdery metal material on the adhesive layer on the inner surface of the plastic part, and cooled by high-temperature hot melt post-molding, but does not mention the thermal conductivity of metal and plastic joints; CN103673739A discloses that the material of the thermally conductive plastic layer is a polymer and a modified polymer-based composite material, and the heat dissipation efficiency is improved through the micro-nano structure of plastic processing, but No mention of thermal conductivity of metal to plastic joints

Method used

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  • A metal-plastic double-layer combination and its preparation method
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  • A metal-plastic double-layer combination and its preparation method

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preparation example Construction

[0030] The present invention also provides a method for preparing the metal-plastic double-layered combination according to the above technical solution, which includes the following steps:

[0031] Mix carbon fiber with boron nitride and PA66 to obtain PA66 composite material;

[0032] Surface treatment of the aluminum alloy metal plate to obtain a metal plate with micropores on the surface;

[0033] Plasma activation is performed on the metal plate with micropores on the surface to obtain an activated metal plate;

[0034] Injection molding the PA66 composite material on the surface of the activated metal plate to obtain a molded sample;

[0035] The formed sample is subjected to heat preservation treatment to obtain a metal-plastic double-layered joint.

[0036] In the present invention, carbon fiber is mixed with boron nitride and PA66 to obtain a PA66 composite material. In the present invention, the humidity of the PA66 composite material is preferably less than 0.2%. The present...

Embodiment 1

[0048] Mix PA6645 parts, carbon fiber (diameter 5μm, length 0.5mm) 20 parts, hexagonal flake boron nitride BN (diameter 5μm, thickness 100nm) 35 parts, after mixing them evenly, add them to the feeding port of the twin-screw extruder, and the twin-screw extruder The temperature of the five extruding temperature zones of the machine is 270°C, the rotation speed of the extrusion screw is 80 rpm, and the extrusion granulation is carried out.

[0049] Choose a 2mm×Ф12.7mm aluminum alloy 6063 plate, use deionized water to wash away the iron filings and stains on the surface of the aluminum sheet after machining. The aluminum sheet is placed in a 5% NaOH solution, so that the solution is immersed in the aluminum sheet sample, ultrasonic Take out after shaking for 5 minutes. Then put the shaken aluminum sheet into acetone and soak for 30s to remove the remaining NaOH solution on the surface, and then subject the aluminum alloy plate to anodizing microporous treatment to obtain a metal p...

Embodiment 2

[0057] Mix PA6645 parts, carbon fiber (diameter 20μm, length 6mm) 25 parts, hexagonal flake boron nitride BN (diameter 35μm, thickness 300nm) 30 parts, after mixing them evenly, add them to the feeding port of the twin-screw extruder, twin-screw extruder The temperature of the 8 extrusion temperature zones of the machine is 260°C, the rotation speed of the extrusion screw is 150 rpm, and the extrusion granulation is performed.

[0058] Choose a 2mm×Ф12.7mm aluminum alloy 6063 plate, use deionized water to wash away the iron filings and stains on the surface of the aluminum sheet after machining. The aluminum sheet is placed in a 5% NaOH solution, so that the solution is immersed in the aluminum sheet sample, ultrasonic Take out after shaking for 5 minutes. Then put the shaken aluminum sheet in acetone, soak for 30s to remove the remaining NaOH solution on the surface, and then subject the aluminum alloy sheet to micro-arc oxidation micro-hole treatment to obtain a metal sheet wit...

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Abstract

The invention provides a metal-plastic double-layer combined part, and belongs to the field of metal-plastic composite structures. The metal-plastic double-layer combined part comprises an aluminum alloy metal sheet layer and a PA66 composite layer, and in composition, the PA66 composite layer comprises, by weight, 10-30% of carbon fiber, 20-40% of boron nitride and the balance PA66. In the metal-plastic double-layer combined part, carbon fiber has high strength and thermal conductivity, boron nitride also has high thermal conductivity, and the addition of carbon fiber and boron nitride is beneficial to forming a thermal conduction network in PA66 and improving thermal conductivity; besides, due to the physical and chemical effects of the aluminum alloy metal sheet layer and the PA66 composite layer, the interface strength of the metal-plastic double-layer combined part is improved. Embodiment data shows that the thermal diffusion coefficient of the metal-plastic double-layer combinedpart is 2.88 m<2> / s, the interface strength of the metal-plastic double-layer combined part is 5.52 MPa, and the metal-plastic double-layer combined part has high thermal conductivity and interface strength.

Description

Technical field [0001] The present invention relates to the technical field of metal-plastic composite structures, in particular to a metal-plastic double-layer combination piece and a preparation method thereof. Background technique [0002] With the continuous development of science and technology, various product components have higher and higher requirements for the comprehensive performance of materials. How to combine the advantages of various materials to make the designed parts have good thermal conductivity, and have light weight, The characteristic of high intensity has always been one of the hot topics of discussion among product designers. [0003] In the prior art, there are few studies on the thermal conductivity of metal-plastic composite structures, and the problem of poor thermal conductivity generally exists in metal-plastic composite structures. For example, CN101578018A discloses that the metal body is used as an insert to be molded by injecting molten plastic ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K7/06C08K3/38B29C45/14B29C45/76B29C45/77
Inventor 李熹平徐东厚宫宁宁曾水萍刘兴茶汪彬
Owner ZHEJIANG NORMAL UNIVERSITY