| 摘要 |
PURPOSE: To obtain a highly flexible tube to be used with a packing vessel for a medical solution by comprising an intermediate layer containing a polymer material to provide flexibility, an inner layer containing a thermal resistant polymer material and an outer layer containing a specified polymer material. CONSTITUTION: A polymer tube used in a medical field comprises an intermediate layer 24 consisting of a polymer material to provide flexibility, an inner layer 26 consisting of a thermal resistant polymer material as well as an outer layer 22 consisting of a polymer material selected from among polypropylene, ethylene-propylene copolymer and modified ethylene-propylene copolymer. The intermediate layer 24 contains a polymer material selected from a group consisting of polyethylene, ethylene-vinyl acetate polymer, ethylene-methyl acrylate copolymer, a blend of ethylene-vinyl acetate copolymer and modified ethylene-methyl acrylate copolymer, a blend of ethylene-vinyl, acetate copolymer and polyethylene, as well as modified ethylene-vinyl acetate copolymer. The inner layer 26 contains a polymer material selected from a group consisting of copolyester, polypropylene, polyvinyl chloride as well as a blend of copolyester and ethylene-vinyl acetate copolymer. |
