Automotive exterior parts

Since one of the ultimate objectives of the RIM process, for its major market of automotive exterior part production, was a cycle time of 2 minutes or less, a great deal of effort was applied to mold construction and design. Continuous automatic operation of a molding station without interruption required improvements in mold release and mold surface technology. Originally, mold preparation following a shot was required due to the buildup of external release agents, which were necessary to enable easy removal of the part from the mold. 

Emphasis on reaction injection-molding (RIM) technology in the automotive industry to produce automotive exterior parts has created a large potential for thermoset polyurethane elastomers. Reaction injection molding, originally known as reaction casting, is a rapid, one-step process to produce thermoset polyurethane products from liquid monomers. In this process liquid monomers are mixed under high pressure prior to injection into the mold. The polymerization occurs in the mold. Commercial RIM... 

Applications and uses automotive components, electrical equipment subjected to high temperatures, parabolic reflectors, solar energy systems, movement sensors, surfboards, golf cars, lawn and garden equipment, sporting goods, automotive exterior parts, safety helmets, and building materials. 

Applications and uses roofing and automotive exterior parts, capping distilled water, dairy products, fruit juices, sports drinks, beer, wine and food, cosmetics, toiletries and pharmaceutical packaging, sterilized closures, seals, and liners. 

TPO compounds are frequently used for automotive exterior parts such as bumper fascia that are painted to match the rest of the vehicle. Getting paint to stick to a nonpolar polyolefin surface can be a difficult technical challenge. Studies have... 

In other important automotive applications, increased requirements in terms of surface appearance, low-temperature toughness, flowability and warpage properties have been met by PBT blends. Automotive exterior parts such as door handles, mirror housings, window delta molding, and sunroof frames must have an excellent surface finish, especially if they are unpainted. For large exterior body parts such as bumpers, elastomer-modified PBT/PC blends are used because of their surface appearance and... 

These copolymers, containing a high level of ITR, have also been commercialized in a highly weather-resistant film that has the appearance of a paint film. The film is available in transparent and opaque colors. In addition, the film can be made with a metallic look. The film can be used with in-mold-decoration (IMD) (see the section Processing Polycarbonates ) molding processes to produce class A automotive exterior parts. Because the film contains very high levels of the ITR resin, it has an excellent balance of scratch resistance, weatherability, chemical resistance, and thermal performance. 

XP4025 - black injection molding grade with excellent weatherability (automotive exterior parts)... 

The main applications of polyamide in the automotive exterior parts sector are rear mirror housing, door handles, windscreen wiper parts, sun roof frames, lock covers, wheel trims, fuel filler caps, painted parts such as wheel trims, and skirts and grilles. Polyamide is not yet used on its own for manufacture of body parts but can be used in combination with other polymers. It is also beginning to be used in manufacture of modular front-end carriers using the Bayer hybrid technology. 

Applications Garden tools. Power tools housings. Gears. Luggage. Office furniture. Automotive (exterior parts). 

All samples were evaluated in an Atlas Ci65 xenon arc weatherometer to check for weatherfastness in an accelerated test. The test method selected was SAE 11960, a method commonly used in the evaluation of automotive exterior parts. Samples were inspected at intervals of 500 kJ/m until a color shift within sample sets was discovered. At that point, one sample from each sample set was recovered from the xenon arc at every 500 kJm up to 2500 kJ/m. Figures 1 through 4 exhibit the appearance of sample sets at 0,1500,2000, and 2500 kJ/m exposure. 

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