LOW FUEL PERMEABLE HOSE AND HOSE MOLDING EXTRUSION HEAD

摘要

PURPOSE:To provide a low fuel permeable hose not happening trouble such that the sealability of a hose connection place is inferior in a hose having a fluoroplastic layer showing low gasoline permeability arranged thereto as the innermost layer and a damage, wrinkles or rupture is caused in the fluoroplastic layer being the innermost layer when an unvulcanized hose is inserted in a bent mandrel to be vulcanized or a straight pipe is assembled in a bent state. CONSTITUTION:Both end edge parts of a fluoroplastic strip like article of which both surfaces are subjected to discharge surface modifying treatment are continuously bonded by an adhesive 4 to constitute a cylindrical fluoroplastic layer 3. This cylindrical fluoroplastic layer 3 is arranged between a flexible inside rubber layer 1 excellent in fuel oil resistance and an outside layer 2 excellent in weathering resistance in a concentric circular state to be bonded to both layers 1, 2.