1,3-propanediol is an important chemical industry material. It can be used as solving solution, resisting frost solution, protecting solution, delicacy chemical industry material and a monomer of new polyester: polytrimethylene terephthalate (PTT) and polyethylene terephthalate. As an engineering thermoplastic, polytrimethylene terephthalate (PTT) combines the rigidity, in addition to benefits of softness, stretch recovery, vibrant color, with stain and heat resistances. Currently, nylon carpet fiber, membr...