Book excerpt: Before the 1970s, plastics were considered primarily as non-engineering materials and were used in applications such as belts, hoses, gaskets, carpet backing, sealing, adhesives, tires, and so forth as a part of an engineering solution. More recently, plastics have replaced traditional materials and emerged as a significant "engineering application" within the automotive industry. Plastics have proven to be cost effective while providing automakers with the design freedom to accommodate safety, styling, and comfort. Engineering Plastics and Plastic Composites In Automotive Applications focuses on some of the various types of plastics and plastic composites and their applications and advantages within passenger vehicles.