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Conductive plastic

Time:2024-04-23 Preview:1

A functional polymer material that is processed by mixing resin and conductive material in the same way as plastic. It is mainly used in electronics, integrated circuit packaging, electromagnetic wave shielding and other fields.


1. According to the electrical properties, it can be divided into: insulator, antistatic body, conductor, high conductor.


Usually, the resistance value above 1010Ω·cm is called insulator; the resistance value in the range of 104~109Ω·cm is called semiconductor or antistatic body; the resistance value below 104Ω·cm is called conductor; the resistance value below 100Ω·cm or even lower is called high conductor.


2. According to the production method of conductive plastics, it can be divided into structural conductive plastics and composite conductive plastics.


Structural conductive plastics, also known as intrinsic conductive plastics, refer to plastics that are conductive themselves or have conductivity after chemical modification. Structural polymer conductive materials mainly include:


(1) π-conjugated polymers: such as linear polyphenylene, layered polymers, etc.;


(2) Metal chelates: such as polyketone phthalocyanine;


(3) Charge transfer polymer complexes: such as polycations, CQ complexes.


This type of polymer material has high production costs and difficult processes, and has not yet been mass-produced. The conductive polymer materials widely used now are generally composite polymer materials, and their filling materials mainly include:


a. Metal dispersion system;


b. Carbon black system;


c. Organic complex dispersion system.


3. According to different uses, it can be divided into: antistatic materials, conductive materials and electromagnetic wave shielding materials.


Uses


Conductive plastics have not only developed rapidly in the application of antistatic additives, computer anti-electromagnetic screens and smart windows, but also have broad application prospects in light-emitting diodes, solar cells, mobile phones, micro TV screens and even life science research. In addition, the combination of conductive plastics and nanotechnology will also promote the rapid development of molecular electronics. In the future, humans will not only be able to greatly improve the speed of computer operations, but also reduce the size of computers. Therefore, some people predict that in the future, laptops can be put into watches.


(1) Anti-static turnover boxes, IC and LCD trays, IC packaging, chip carriers, film bags, etc. used in the production process of precision electronic components such as integrated circuits, chips, sensor sheaths, etc. in the fields of electronics and electrical appliances.


(2) Shells and structural parts of explosion-proof products, such as shells and structural parts of electrical products used in coal mines, oil tankers, oil fields, dust and combustible gas occasions.


(3) Semiconductive shielding materials used in medium and high voltage cables.


(4) EMI shielding shells of electrical products in the fields of telecommunications, computers, automation systems, industrial electronic products, consumer electronic products, automotive electronic products, etc.