September 17, 2007 - In this week's search of the week video we look for High Speed PBT (polybutylene terephthalate). There are more than 2300 commercially available PBT grades (1432 in North America, 1300 in Europe and 900 in the Pacific Rim). PBT offers excellent mechanical properties combined with good chemical resistance. PBT has good impact resistance and toughness, low coefficient of friction & wear, and does not need lubrication. It also is resistant to chemicals, chlorine, water, and steam. They are designed for applications that demand mechanical property retention, during exposure to high heat and humidity.