What is 'engineering plastic'

Engineering plastics refers to the plastic can be used as structural materials. It with general plastic and there is no clear boundaries, the main varieties are polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, thermoplastic polyester, thermoplastic polyurethane, polysulfone, aromatic sulfone ( See the polysulfone) , PPS and other aromatic heterocyclic polymers, etc. Others will fluorine resin, ultra-high molecular weight polyethylene and all thermoplastics reinforced plastics, and other based polymer blend and modification of the materials included. Five, polyoxymethylene, polycarbonate and polyamide engineering plastics polyphenylene oxide, thermoplastic polyester. The characteristics of the engineering plastics (1) density is small, generally for steel 1/4, 1/9 ~ 1/5 of copper, aluminium 1/2. For the comprehensive reduce the weight of the vehicle, aircraft have a special meaning.