Patent ID: 8039061
Filing Date: 2011-10-18
Classification: B29C,Y10T

Abstract:
1. A method for producing a hose with a sealing layer, comprising: preparing a hose body having a resin layer defining an innermost layer, the hose body including a connecting portion on an end portion of the hose body for being connected to a mating pipe, the connecting portion having a straight tubular portion including an inner surface and an outer surface that extend parallel to a direction of an axis of the hose body; disposing a core rod through a center portion of a hollow interior of at least the straight tubular portion of the connecting portion so as to occupy the center portion, the core rod not allowing a gas to flow through the interior of the core rod, the core rod being constructed so as to allow the gas that is fed in a hollow interior of the hose body to entirely contact the inner surface of the hose body; feeding a plasma gas created by generating a glow discharge between a pair of electrodes in an interior of the innermost layer of the connecting portion of the hose body, distributing the plasma gas from an open end of the connecting portion inwardly in the direction of the axis along an annular space defined between an outer surface of the core rod and an inner surface of the innermost layer to act on the inner surface of the innermost layer, and thereby modifying the inner surface of the innermost layer; and forming a sealing layer on the inner surface of the connecting portion in adherent relation thereto by coating an elastic material for the sealing layer on the inner surface of the connecting portion after modifying the inner surface of the innermost layer.