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Support material for electromagnetic compatibility and wireless product testing, and preparation method thereof

A support material, electromagnetic compatibility technology, applied in the coating and other directions, can solve the problems of unsatisfactory, poor mechanical properties and temperature resistance, not meeting electromagnetic compatibility and wireless product standards and specifications, etc., to achieve low cost and simple methods Effect

Active Publication Date: 2015-08-12
GUANGZHOU CHANGEN ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, among the known material properties, the relative dielectric constant of wood, plastic, PTFE, FRP and other materials must be greater than 1.4, which does not meet the requirements of electromagnetic compatibility and wireless product standards and specifications.
The dielectric constant of only a few polyethylene foam materials can meet the requirement of a relative dielectric constant of less than 1.4, but its material characteristics determine that its mechanical properties and temperature resistance are very poor, and it cannot meet the samples of electromagnetic compatibility and wireless product tests. Especially heavy and heat-generating samples have strict requirements on the mechanical properties of the support material

Method used

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Embodiment Construction

[0018] The raw materials including polyisocyanate, polyether polyol, small molecular polyol and water are prepared into two kinds of prepolymers. The main components of these two prepolymers are different. The main component of one is polyisocyanate, and the main component of the other is polyether polyol, small molecule polyol, and water. Once the two prepolymers are combined, a series of chemical and physical reactions will occur. The ratio of prepolymer is controlled between 1:1 and 1:3. The two prepolymers are placed in two different containers to prevent premature reaction. After the two prepolymers are filled into the same container, they are fully stirred at high speed and quickly filled into the prepared mold. The ratio and total weight of the two prepolymers charged into the mold will affect the density and hardness of the final formed material. The density of the final material should be controlled between 30 kg per cubic meter and 600 kg per cubic meter.

[0019...

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Abstract

The invention relates to a support material for electromagnetic compatibility and wireless product testing, and a preparation method thereof. According to the present invention, polyisocyanate, polyether polyol, small molecule polyol, water and other cross-linking agents and other raw materials are used to prepare a polymer, the polymer is filled into a mold, the generated material is subjected to a series of process treatments, the surface is coated with an adhesion material comprising dihydroxy siloxane, a filler, a cross-linking agent and a catalyst, and air-drying is performed so as to form the support material meeting the electromagnetic compatibility standard and regulatory requirements.

Description

technical field [0001] The invention relates to a support material and a preparation method used in electromagnetic compatibility and wireless product testing, especially the relative permittivity of the support material is lower than 1.4 required in the test standards and specifications, and the relative magnetic permeability is less than 1.1. It has the characteristics of high strength, high temperature resistance and simple preparation method. Background technique [0002] At present, there are many types of support materials used in electromagnetic compatibility and wireless product testing, including but not limited to wood, plastic, polyethylene foam, polytetrafluoroethylene, fiberglass, etc. The common point of these materials is that they are non-conductive , compared with conductive materials, it can reduce the impact on the test results when supporting the sample, but the relative permittivity of these common materials varies greatly, and the relative permittivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08J7/04C09D183/06C09D7/12C08G101/00
CPCC08G18/3203C08G18/48C08G18/6674C08J2375/08C08J2483/06C08K3/36C08K5/5419C08K5/57C09D183/06C09D7/40C08J7/0427C08G2110/0025C08G2110/0041C08G2110/0083
Inventor 李军李楠李争平
Owner GUANGZHOU CHANGEN ELECTRONICS TECH CO LTD
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