ABS related inspection standards
A, ABS (hard) is by acrylonitrile, butadiene, styrene polymerization of plastics, it is colorful and eye-catching, heat-resistant, sturdy, the outer surface of the chromium, nickel and other metal films can be plated, can be made piano keys, buttons, knife holders, television housings, umbrella handles and so on. Shell, umbrella handle and so on.
Two, ABS plastic (hard):
1, good overall performance, high impact strength, chemical stability, good electrical properties.
2, and 372 plexiglass with good fusion, made of two-color plastic parts, and the surface can be chrome plating, paint treatment.
3, high impact, high heat resistance, flame retardant, enhanced, transparent and other levels.
4, mobility than HIPS a little worse than PMMA, PC, etc., good flexibility. Uses: Suitable for making general mechanical parts, wear parts, transmission parts and telecommunication parts.
Molding characteristics:
1. Amorphous material, medium fluidity, moisture absorption, must be fully dry, the surface requires glossy plastic parts must be preheated and dried for a long time 80-90 degrees, 3 hours.
2. It is desirable to take a high material temperature, high mold temperature, but the material temperature is too high easy to decompose (decomposition temperature of >270 degrees). For higher precision plastic parts, mold temperature should be taken 50-60 degrees, for high gloss. Heat-resistant plastic parts, mold temperature should be 60-80 degrees.
3, such as molding heat-resistant grade or flame retardant grade material, the production of 3-7 days after the mold surface will be residual plastic decomposition of the material, resulting in the mold surface shiny, the need to clean the mold in a timely manner, at the same time, the mold surface needs to increase the exhaust position.
4, such as the need to solve the water folder pattern, need to improve the fluidity of the material, to take a high material temperature, high mold temperature, or change the water level and other methods.
ABS resin is currently the largest production, the most widely used polymers, it will PS, SAN, BS of the various properties of the organic unity, both tough, hard, rigid balance of excellent mechanical properties.ABS is acrylonitrile, butadiene and styrene ternary **** polymer, A on behalf of the acrylonitrile, B on behalf of the butadiene, S on behalf of the styrene.
ABS engineering plastics are generally opaque, the appearance of light ivory, non-toxic, odorless, both tough, hard, rigid characteristics, burning slowly, the flame is yellow, there is black smoke, combustion of plastic softening, burning, emitting a special smell of cinnamon, but no melting drip phenomenon.
ABS engineering plastics have excellent overall performance, excellent impact strength, good dimensional stability, electrical properties, abrasion resistance, chemical resistance, dyeing, molding and machining is better.ABS resin is resistant to water, inorganic salts, alkalis and acids, insoluble in most alcohols and hydrocarbon solvents, but easily dissolved in aldehydes, ketones, esters and some chlorinated hydrocarbons.
Disadvantages of ABS engineering plastics: lower heat distortion temperature, combustible, poor weather resistance.