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Introduction to the characteristics and basic knowledge of ABS plastics

Source:Time:2019-09-16 11:43:00View Number:

ABS plastic

Chemical name: acrylonitrile-butadiene-styrene copolymer

English name: Acrylonitrile Butadiene Styrene

Specific gravity: 1.05 g / cm 3 Molding shrinkage: 0.4-0.7%

Molding temperature: 200-240 ° C Drying conditions: 80-90 ° C 2 hours

ABS plastic features:

1. Good comprehensive performance, high impact strength, chemical stability and good electrical performance.

2, and 372 plexiglass has good weldability, made into two-color plastic parts, and can be chrome-plated and painted.

3, has high impact, high heat, flame retardant, enhanced, transparent and other levels.

4, the fluidity is a little worse than HIPS, better than PMMA, PC, etc., and good flexibility.

Uses: Suitable for making general mechanical parts, wear-resistant parts, transmission parts and telecommunications parts.

Molding characteristics:

1. Amorphous material, medium fluidity, large moisture absorption, must be fully dry, the surface of the plastic parts requiring gloss must be preheated for a long time to dry 80-90 degrees, 3 hours.

2. It is advisable to take high material temperature and high mold temperature, but the material temperature is too high to be easily decomposed (decomposition temperature is >270 degrees). For high precision plastic parts, the mold temperature should be 50-60 degrees, high gloss. For thermoplastic parts, the mold temperature should be 60-80 degrees.

3. If you need to solve the water trap, you need to improve the fluidity of the material, adopt high material temperature, high mold temperature, or change the water level.

4. If the heat-resistant grade or flame-retardant grade material is formed, the plastic decomposition product will remain on the surface of the mold after 3-7 days of production, which will cause the surface of the mold to be bright. It is necessary to clean the mold in time, and the surface of the mold needs to increase the exhaust position.

ABS resin is currently the largest and most widely used polymer. It combines the properties of PS, SAN and BS organically, and has excellent mechanical properties of toughness, hardness and rigid phase balance. ABS is a terpolymer of acrylonitrile, butadiene and styrene, A represents acrylonitrile, B represents butadiene, and S represents styrene.

ABS engineering plastics are generally opaque, the appearance is light ivory, non-toxic, tasteless, with tough, hard, rigid characteristics, slow burning, yellow flame, black smoke, softened, burnt, and special after burning The smell of cinnamon, but no melting dripping phenomenon.

ABS engineering plastics have excellent comprehensive properties, excellent impact strength, dimensional stability, electrical properties, wear resistance, chemical resistance, dyeability, molding processing and mechanical processing. ABS resins are resistant to water, inorganic salts, alkalis and acids, are insoluble in most alcohols and hydrocarbon solvents, and are readily soluble in aldehydes, ketones, esters and certain chlorinated hydrocarbons.

Disadvantages of ABS engineering plastics: low heat distortion temperature, flammable, and poor weather resistance.

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