To provide a multi-layered tube useful for a liquid for an air conditioner, a liquid containing volatile substances and a cooling liquid and an oil for an engine.
The multi-layered tube has following layers (1) to (4) in this order in a radial direction from the outer side to the inner side with the adjacent layers adhered to one another in the respective contact regions: (1) the 1st layer of a vulcanized elastomer serving as the outer layer, (2) the 2nd layer consisting of EVOH or an EVOH-based mixture, (3) the 3rd layer consisting of a mixture of a polyamide (A) and a polyolefin (B) containing a polyamide as a matrix, and (4) the inner layer of a vulcanized elastomer as the optional layer. A binding layer may intervene between the inner layer and the 3rd layer, and a fibrous reinforcing layer comprising a polyester or a metal wire can be incorporated.
| WO/2021/054364 | TUBE AND FRAGRANCE PRODUCT |
| JP3923350 | CORRUGATED CONDUIT TUBE |
| JPS5551186 | CONDUIT PIPE FOR PIPING SYSTEM OF HYDRAULIC PRESSURE CONTROL |
MERZIGER JOACHIM
MALDEME CHRISTOPHE
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