Low-smoke antistatic laser-markable ABS composite material

Abstract

The invention provides a low-smoke antistatic laser-markable ABS composite material. The composite material is prepared from the following raw materials in parts by weight: ABS 65-92 parts, low-smokedensity material 5-30 parts, zinc sulfide 0.5-5 parts, antistatic agent 0.3-2 parts, and processing aid 0.1-2 parts, wherein the low-smoke density material is poly(methyl methacrylate) or methyl methacrylate-acrylonitrile-butadiene-styrene copolymer. The low-smoke antistatic laser-markable ABS composite material of the present invention improves the phenomenon that ABS emits a large amount of smoke after absorbing laser energy, avoids substantial reduction of mechanical properties by selecting a material having good compatibility with the ABS, and has advantages on the aspect of mechanical retention compared with a conventional method of adding a smoke suppressant and an inorganic filler.

Description

technical field [0001] The invention belongs to the field of modified plastics, in particular to a low-smoke, antistatic and laser-markable ABS composite material. Background technique [0002] Acrylonitrile-butadiene-styrene graft copolymer (ABS) is a commonly used plastic with a "sea-island structure". It has the advantages of high gloss, excellent rigidity, solvent resistance, and good toughness. It is widely used in home appliances, lighting , office, automobile and other industries. Laser marking has the advantages of fast operation, long-lasting marking, and beautiful visual appearance. The mechanism of laser marking ABS is that ABS absorbs laser energy to produce carbonization, which can mark black marks on light-colored surfaces. However, ABS is a material with high smoke density, which will generate a lot of smoke during the marking process, which will cause a high concentration of particulate matter in the operating environment and endanger the health of operatin...

AI Technical Summary

Problems solved by technology

Conventional ABS smoke suppressors are added with smoke suppressant or inorganic fillers, but there is a defect that the material properties are greatly attenuated

At the same time, ordinary ABS material does not have antistatic function, it will not only absorb smoke particles in the marking process, but also adsorb particles in the air, causing surface stains, and there is a risk of electrostatic breakdown of electrical components when used as electronic and electrical enclosures

[0003] Chinese patent CN101418110A discloses a PC / ABS resin composition that uses acrylate powder rubber as a laser auxiliary agent, which has a good laser marking effect, but does not have antistatic function and has hidden dangers of smoke and dust adsorption.

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