TPE/TPR thermoplastic elastomer conductive performance analysis

  • Time of issue:2022-11-18
  • Views:968

TPE/TPR thermoplastic elastomer conductive performance analysis

  • Categories:Industry News
  • Author:SPP
  • Time of issue:2022-11-18
  • Views:968


  Domestic thermoplastic elastomer TPE / TPR material industry in the continuous development and improvement, has been gradually used in all walks of life, the material requirements are becoming more and more stringent, such as: flame retardant grade, high elasticity, abrasion resistance and other special materials research and development.

  With the continuous improvement of materials, products continue to push the new requirements of conductive TPE/TPR materials, but also the inevitable result of market development, with the development of the market, thermoplastic elastomer industry in will become more and more colorful, to provide people with better and more comfortable materials for their lives. Before talking about conductive TPE/TPR, we will first understand conductive rubber from the side, and then assess the technical difficulty of the development of conductive TPE/TPR.

  Conductive rubber: conductive rubber is a glass plated silver, aluminum plated silver, silver and other conductive particles evenly distributed in rubber (generally silicone rubber), through the pressure to make contact with conductive particles to achieve good conductive properties, in the military and commercial applications. Its main role is to seal and electromagnetic shielding, the product can be molded or extruded into shape, there are sheets or other punching and cutting shapes available.

  Conductive rubber conductive principle: conductive rubber filled with conductive particles when filled with a certain number of volume, mutual contact, the formation of a continuous state of electrons, thus having electrical conductivity. Conductive rubber must be subject to a certain compression force in order to conduct electricity well, the structure must be designed to ensure that the appropriate pressure but not pressure. The main role of conductive rubber is to seal and electromagnetic shielding, commonly used in some electronic materials components, in the aerospace and military industries have important applications.

  Then analyze the conductivity of TPE. According to the size of the surface resistance of the material, in terms of dielectric properties, TPE can be divided into the following three categories of grades.

  1. Products with surface resistance value of 10 to the 13th power or more for insulation grade TPE/TPR;

  2. TPE/TPR of anti-static grade with surface resistance value between 5 and 12 times of 10;

  3. The product surface resistance value reaches below the 5th power of 10 for conductive grade TPE/TPR.

  According to the above division, anti-static grade TPE and conductive TPE, there are still some differences. Usually TPE/TPR are anti-static grade materials. In terms of anti-static, in actual cases, the surface resistance value of products required by different customers may be different, and sometimes there may be some restrictive requirements for the TPE blending system. TPE/TPR has a similar molecular chain structure to rubber, and according to the above rubber modification idea, TPE/TPR seems to be able to imitate. However, it is necessary to take into full consideration the similarities and differences between the TPE blending system and silicone rubber. the TPE blending system is more complex and requires consideration of the compatibility of the phase structure of each component, the homogeneity of the blend dispersion, etc.


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