| 摘要 |
PROBLEM TO BE SOLVED: To provide a hose having a function predicting its sudden burst due to wear/deterioration of the inner face, which cannot be detected from the outside of the hose. SOLUTION: The hose formed of a rubber or a synthetic resin, or these composite material has a function of sensing wear/deterioration. Herein, a layer containing a material for coloring substances flowing in the hose exists at the same depth portion in the cross section for preventing the sudden burst due to inner pressure as a result that the hose wall face becomes thinner with the wear on the inner face in use or the hose wall face becomes brittle with inside deterioration. COPYRIGHT: (C)2008,JPO&INPIT
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