Polyester is a synthetic fiber is an important species, is the trade name of polyester fiber. Polypropylene. It is purified terephthalic acid (PTA) or dimethyl terephthalate (DMT) and ethylene glycol (EG) as raw materials by esterification or transesterification and polycondensation obtained fiber-forming polymer - - polyethylene terephthalate (PET) GB 18173.1-2006 "waterproofing the first portion of the sheet," the corner shop should add an additional layer; yin and yang angle, etc. are made of R = 20mm rounded ??? Polypropylene | Tianxiang waterproof Shouguang | PP Which is provided by Shouguang City Tianxiang waterproof material plant. Polypropylene | Tianxiang waterproof Shouguang | PP Which is Shouguang City Tianxiang waterproof material plant (www.txfscl.com) this year introduced a new upgrade, the above picture is for reference only, please call the telephone or pictures on this page, for the latest Information, Contact: Zhang Guang.