COEXTRUDED MULTILAYER POLYMER HOSE OR PIPE

摘要

PURPOSE: To obtain a hose or pipe showing slight permeability sufficient to determine the protection of environment and safety by providing a barrier layer comprising polyester in a multilayered polymer hose or pipe. CONSTITUTION: A multilayered polymer hose or pipe has at least one barrier layer comprising at least one polyester. As polyester, for example, polyethylene terephthalate or polybutylene terephthalate is used. Isophthalic acid and a polyester forming component are proper along with terephthalic acid. Further, block copolyester ester having a polyether soft segment is used.