色狠狠av老熟女,欧美xxxxhd高清,日韩精品无码熟人妻视频,yy6080久久伦理一区二区

TPEE

       TPEE is a block copolymer containing a hard segment of polyester and a soft segment of polyether. TPEE has the elasticity of rubber and the strength of engineering plastics; the soft section gives it elasticity, making it like rubber; the hard section gives it processing properties, making it like plastic;