Patent ID: 6537630
Filing Date: 2003-03-25
Classification: B29C,Y10T

Abstract:
A blow-molded hose of a synthetic resin, which comprises a monolayer segment formed comprising a first resin layer of either a soft resin or a hard resin and a multilayer segment formed with the first resin layer and a second resin layer of a hard resin when the first resin layer is a soft resin or a soft resin when the first resin layer is a hard resin, and the thickness ratio, in the multilayer segment, of the first resin layer is thinner than that of the second resin layer, whereinsaid soft resin comprises at least one member selected from the group consisting of: a low-density polyethylene, a middle-density polyethylene, a linear low-density polyethylene, an ethylene copolymer, a plastisized polyvinyl chloride, a polyurethane, and a thermoplastic elastomer, said hard resin comprises at least one member selected from the group consisting of: a polypropylene, a high-density polyethylene, an ethylene-propylene copolymer, and a polyvinyl chloride, said monolayer segment and said multilayer segment alternate in the longitudinal direction of the hose, and the thickness of the hose is constant along the longitudinal direction of the hose.