2014年10月11日星期六

PC—Injection plastic materials

PC—Injection plastic materials

PC is a kind of colorless or primrose material, with high tensile strength, bending intensity, elasticity and impact resistance. PC physical properties, almost equal to metallic materials, will not change dramatically with different temperature and the intensity can be retained under 140℃.

PC brittle temperature is as low as —100℃~140℃ and PC impact resistance is pretty high, amounting to the top among plastic. PC can be made into rubber helmets and safety helmets. PC is also provided with strong resistance against ultraviolet radiation; a weather resistance test wherein the substance is exposed outdoors for ten years proves that its mechanical property remains totally unchanged. In addition, PC is sound in electric properly. PC chemical resistance is against acid rather than alkali. Only when temperature reaches 220℃~230v will PC begin to be softened and fused. Due to its high viscosity, the substance, during molding and processing, requires high temperature and pressure higher than that of polystyrene resigns.

PC can be manufactured into safety helmets, various mechanical parts and shells as well as components of electric appliances which require high electric insulation, intensity, heat resistance, transparency, vibration endurance and stable dimension.

PMMA—Injection mold plastic materials

PMMA, like polystyrene(PS), possesses the optimal transparency among all plastics and is more difficult to be cut than polystyrene resin. PMMA can be tabular polymethyl methacrylate and can be heated and bent into curved surface; the relative density thereof is also light. PMMA can be tinged into gallant colors and extensicely applied in building materials and furniture.

ABS Resin and AS Resin—Injection plastic materials

The aggregation of styrene monomer, acrylonitrile monomer and butadiene rubber can produce a polymer (ABS) constituted by acrylonitrile (A), butadiene rubber (B) and styrene(S) in various proportions. Shows such features as high impact resistance, large tensile strength and high rigidity, which will not alter even under low temperature

PS Resin—Injection plastic materials

The composite ethylene gas made from benzene (adopted from coal tar petroleum) and ethylene gas, is dehydrogenated by metal oxide catalyzed heated to 600℃ into styrene monomer, which is then catalyzed and aggregated into PS resin through such catalyzer as inorganic or organic peroxide.

PVC—Injection plastic materials

The PVC Resin monomer arises from the reaction between Acethlene and hydrochloric acid, and the monomer thereafter is aggregated into PVC Resin through various methods. PVC Resin is devoid of stability against heat and light, and therefore, stabilizers shall be added therein to avoid discoloration or decomposition upon the materials’ being processed into finished products.

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