PU: Pu, called polyurethane, is a general term for polymer compounds produced by reaction of diisocyanate or polyisocyanate with compounds with more than 2 hydroxyl groups. Its main chain contains many repeated NHCOO groups. Commonly used diisocyanate with toluene diisocyanate (TDI), two diphenyl methane diisocyanate (MDI) and hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (HMDI), Papi (PAPI, two) benzene methylene diisocyanate (XDI) etc.. According to the different hydroxyl groups used, they can be divided into two types: polyester type and polyether type. It can be used in the manufacture of plastic products, wear-resistant synthetic rubber products, synthetic fibers, hard and soft foam plastics, adhesives and coatings.
The classification of PU: thermosetting and thermoplastic.
TPU: it is the English abbreviation of thermoplastic polyurethane.
The use of TPU products is very broad, there are common automobile parts, such as brake pedal, dust cover, anti-skid chain, inside and outside decoration, industrial components such as gears, seals, clothing belt, soccer shoes, softball shoes, golf shoes, boots and other footwear and clothing, watches, bicycle handlebars throughout life everywhere...