Automotive interior plastics

An additional parameter introduced into the CMC equation, the commercial factor, is a number that changes not the shape of the tolerance solid but the volume of the tolerance solid. The need for this arose because of the definition of acceptable tolerance limit. It was desired to have an equation in which the tolerance limit would always occur at the value 1.0. Thus, values below 1.0 would be identified as acceptable and values above 1.0 would be identified as unacceptable, or pass and fail, respectively. But the requirements of automotive interior plastics or computer cabinet panels are much more critical than those of toys or single-use pro-... 

The Effect of Surface Texture on the Friction of Automotive Interior Plastics... 

Kawamura, N., Nomura, T., and Nishio, T., Super Olefin Polymer for Material Consolidation of Automotive Interior Plastic Parts, SAE Technical Paper No. 960296, SAE International, Warrendale, PA, 1996. 

Aryl Phosphates. Aryl phosphates were introduced into commercial use early in the twentieth century for flammable plastics such as cellulose nitrate and later for cellulose acetate. CeUulosics are a significant area of use but are exceeded now by plastici2ed vinyls (93—95). Principal appHcations are in wire and cable insulation, coimectors, automotive interiors, vinyl moisture barriers, plastic greenhouses (Japan), furniture upholstery, conveyer belts (especially in mining), and vinyl foams. 

Ultramarine blues, reds and violets are acid sensitive. As such, their thermal and weathering properties are adversely affected in acidic media. Silica-encapsulated versions offer marked improvement in thermal stability and some improvement in weathering properties. The treated versions allow broad polymer usage, even in engineering plastics such as polycarbonate, and provide sufficient durability for automotive interior applications. Weatherability is highly dependent upon the degree of exposure to acid or alkaline conditions. 

Highly permanent, low volatility, linear plasticizer used in wire and cable insulation for automotive and communications applications, low temp, high performance film and sheeting as well as low fogging automotive interiors. 

Wood-plastic and other natural fiber-plastic composite materials are being increasingly used in automotive industries. Woodstock, made with a mix of about 50% wood flour and 50% PP, is still widely used for automotive interiors, but the industry appears to be especially interested in components made form recycled plastics, and the introduction of wood-filled compounds for molding has spurred some of this interest. 

Fogging experienced in an automotive interior cannot be solved by adding fogging additives because it is caused by condensation of plasticizer (or other... 

Keywords Automotive interiors. Biodegradable plastics, Condoms, Designing structural components. Door handles. Fiber composites. Interior paneling elements. Joint endoprostheses. Kneading clay. Mats for office chairs (carpet protection). Packaging material. Parts in cars. Polycarbonate glasses, Pressboard, Rubber plates. Tires, Toys made of soft PVC, Utilization phase... 

Uses Acrylic for coatings, automotive interior rigid plastic applies. Features Very hard emulsion with lower than expected min. film formation exc. chem., detergent, and water reset. exc. weathering resist, and adhesion to plastics... 

Fire test requirements for the acceptability of automotive interior materials should be changed so that materials with improved fire performance are used in future. Since the fire performance of typical car interior materials seems to be poorer than that of conventional plastic materials that can be found commercially in the market place, then improvements in automotive materials lire performance should be easily achievable. This can result fi om either using intrinsically safer plastic materials or from adding flame retardants to existing materials. 

Leather-like skins for automotive interior applications such as instrument panel surfaces and door panels are also under development. Compared with PVC, flexible PP provides improved aging and reduced window fogging, because no plasticizer is used. Recycling is enhanced as more parts are made Irom PP. 

In vinyls, the aryl phosphates are frequently used in combinations with ph-thalate plasticizers. The proportion of the more expensive phosphate is usually chosen so as to permit the product to reliably pass the flammability specifications. In plasticized vinyls used in automotive interiors, these phosphates are used to pass the Federal Motor Vehicle Safety Standard 302. 

The amount of plasticizer added to a polymer varies depending on the effect required. A small addition of plasticizer may be made to improve the workability of the polymer melt. This contrasts with large additions made with the specific intention of completely transforming the properties of the product. PVC without a plasticizer, ie, unplasticized PVC (PVC-U), is used in applications such as pipes, siding, and window profiles. With plasticizer added, articles such as automotive interior trim, jacketing, cable insulations, and PVC floorings are formed. 

In a flexible PVC compound the trimellitates are less volatile and have improved thermal stability over the phthalate and polymeric plasticizers. Their plasticizing effectiveness and compatibility are similar to phthalates. They offer better moisture and water resistance than the phthalates or polymeric plasticizers. Large volumes of trimellitate esters are used in 90°C and 105°C UL rated insulation compounds. Because of their extraction and migration resistance, thermal stability, and low volatility, the trimellitates are used in conjimction with 9IIP and DUP in automotive interior trim applications where windshield fogging is an issue. 

---