| 摘要 |
PROBLEM TO BE SOLVED: To prevent an insertion portion flexible tube fro, being deteriorated even when an autoclave sterilization is performed, keep a favorable slipperiness on the surface, be light-weight, and provide a proper flexibility. SOLUTION: The skin 18 of a flexible tube 10 is constituted by laminating a porous fluorine contained resin layer 19, a fluorine contained rubber layer 20, a fluorine coating layer 21 in this order from the internal surface side. The porous fluorine contained resin layer 19 and the fluorine contained rubber layer 20 are formed into a tube body which is integrally molded, and are formed in such a manner that the fluorine container rubber enters the cavities 19a on the surface of the porous fluorine contained resin layer 20 in a wedge-form.
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