Time：2010-4-28 13:52:45 | Form：http://iask.sina.com.cn/b/12435042.html?from=related
Favorite | Copy Links | Print | Pv: Conductive rubber, conductive polymer composite material is a. Conductive polymer composite materials Zhi polymer itself is not conductive, but in the process forming O'clock by Jia Ru conductive fillers, such as carbon black, metal powder foil, etc., Liyongfensan compound, Ceng-based compound, surface recombination and other methods to make Products with electrical conductivity. Among them, the dispersion compound most commonly used.
Conductive rubber is widely used in electronics industry.
The type and application of conductive rubber
Application of conductive rubber, with the large-scale integrated circuits and electronics industry in recent years, the development of rapidly growing. With the consumer demand from the market and modern technology advances, the emergence of a number of sophisticated new technology electronic products. Matched, a new variety of high-precision rubber products are one after another conductive.
Isotropic conductive rubber
Isotropic conductive rubber in all directions with uniform conductivity, suitable for both elastic resistance there, does not produce oscillations, the switch load is small, can be made into any shape of button switches. At present, has been used to produce computer and video games of the keyboard, next to a large number of office automation equipment.
Anisotropic conductive rubber
Anisotropic conductive rubber has a certain direction conductivity. It is suitable for high resistance within the liquid crystal display or a printed circuit board connector contact of low resistance connector. The manufacturing method has two kinds: (1) thin layer of rubber containing carbon black conductive alternately overlap along the vertical direction by the post-curing cut into thin slices; (2) conductive fibers or metal wires aligned in the rubber.
Pressure-sensitive conductive rubber
Pressure-sensitive conductive rubber electrical conductivity increases with the pressure resistance of smaller, generally without power when the insulator. It has two kinds of types: (1) switch type, not subject to pressure for the insulator (open circuit), when the pressure reaches a certain value, the resistance sharply decreased to conductive state (connect); (2) Analog-type, with its resistance gradual change in pressure changes. Switching pressure sensitive conductive rubber can be used to make solid-state switches and switch components without impact, such as highway or road vehicle use information sensors.
Electromagnetic shielding conductive rubber
As electronic devices, communications equipment and computers themselves will produce electromagnetic waves, but also by external electromagnetic interference, therefore, should be shielded against electromagnetic waves.
Electromagnetic shielding conductive rubber used silver particles, silver plated copper particles, silver particles or silver aluminum as the conductive fillers such as glass beads, and silicone rubber or fluorosilicone rubber match, can be made from this type of conductive rubber. The rubber not only has good conductivity, magnetic and electromagnetic shielding properties, but also has good air tightness, water tightness, pressure tightness and corrosion resistance.
Anti-static conductive rubber
The volume resistivity of conductive rubber anti-static for the 104-108Ω.cm, in the past many of these conductive rubber to carbon black as filler, product is black, and black rubber after aging precipitation will pollute the environment. In recent years, the domestic use more silicon silicide filler, can be made into different colors for color anti-static conductive rubber, the volume resistivity for the 105-107Ω.cm, anti-static performance is better than black rubber. |
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