| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a multi-layered tube for obtaining considerably low permeability performance which cannot be obtained with a known multi-layered tube. <P>SOLUTION: In the multi-layered tube having a multi-layered structure consisting of a plurality of resin layers formed of thermoplastic resin, at least two low permeable resin layers out of the plurality of resin layers are provided, and each of them is formed of resin materials of different low permeability. <P>COPYRIGHT: (C)2004,JPO</p> |
