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汽车上的朔料材料

(2017-08-13 12:32:02) 下一个

 

 

PP – polypropylene is extremely chemically resistant and almost completely impervious to water. Black has the best UV resistance and is increasingly used in the construction industry. Application: automotive bumpers, chemical tanks, cable insulation, battery boxes, bottles, petrol cans, indoor and outdoor carpets, carpet fibers,

PUR – polyurethane materials are widely used in high resiliency flexible foam seating, rigid foam insulation panels, microcellular foam seals and gaskets, durable elastomeric wheels and tires, automotive suspension bushings, electrical potting compounds, hard plastic parts (such as for electronic instruments), cushions,

PVC – poly-vinyl-chloride has good resistance to chemical and solvent attack. Its vinyl content gives it good tensile strength and some grades are flexible. Colored or clear material is available. Application: automobile instruments panels, sheathing of electrical cables, pipes, doors, waterproof clothing, chemical tanks,

ABS – acrylonitrile-butadiene-styrene is a durable thermoplastic, resistant to weather and some chemicals, popular for vacuum formed components. It is a rigid plastic with rubber like characteristics, which gives it good impact resistance. Application: car dashboards, covers,

PA – polyamide is known as nylon 6.6 or nylon 6. Both these nylons have high resistance to abrasion, low friction characteristics and good chemical resistance. They also absorb water easily and components in wet or humid conditions will expand, precluding their use in applications where dimensional stability is required. Application: gears, bushes, cams, bearings, weather proof coatings,

PS – polystyrene is very popular, ease to manufacture, but has poor resistance to UV light. Application: equipments housings, buttons, car fittings, display bases, PE – polyethylene has good chemical resistance. Two types are used, low density polyethylene (LDPE) and high density polyethylene (HDPE) can be manufactured in a range 30 of densities. Application: glass reinforced for car bodies, electrical insulation, packaging, where strength and aesthetics are important, POM – polyoxymethylene (also know as polyacetal or polyformaldehyde) has big stiffness, rigidity and excellent yield, which are stable in low temperatures as well. Very good chemical and fuel resistance. Application: interior and exterior trims, fuel systems, small gears,

PC – polycarbonate has good weather and UV resistance, with transparency levels almost good as acrylic. Applications: security screens, aircraft panels, bumpers, spectacle lenses, headlamp lenses,

PMMA – acrylic is more transparent than glass, has reasonable tensile strength (shatter proof grades are available) and good UV and weather resistance, high optical quality and surface finish with a huge colour range. Application: windows, displays, screens,

PBT – polybutylene terephthalate has good chemical resistance and electrical properties, hard and tough material with water absorption, very good resistance to dynamic stress, thermal and dimension stability. Easy to manufacture - fast crystallization, fast cooling. Application: foglamp housings and bezels, sun-roof front parts, locking system housings, door handles, bumpers, carburetor components,

PET – polyethylene terephthalate has similar conditions as PBT, good thermal stability, good electrical properties, very low water absorption, excellent surface properties. Application: wiper arm and their gear housings, headlamp retainer, engine cover, connector housings,

ASA – acrylonitrile styrene acrylate material has great toughness and rigidity, good chemical resistance and thermal stability, outstanding resistance to weather, aging and yellowing, and high gloss. Application: housings, profiles, interior parts and outdoor applications.

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