Abstract: Provided are a flexible tube for an endoscope, the flexible tube having good elasticity, being capable of sufficiently maintaining adhesiveness between a flexible-tube base and a polymer cover layer covering the flexible-tube base even when repeatedly exposed to heat for a long time, and being less likely to undergo a decrease in the adhesiveness between the flexible-tube base and the polymer cover layer even when subjected to disinfection treatment with a hydrogen peroxide solution, an endoscopic medical device including the flexible tube for an endoscope, and methods for producing the flexible tube and the endoscopic medical device. The flexible tube for an endoscope has a flexible-tube base containing metal as a constituent material, a layer containing a siloxane compound and disposed on the flexible-tube base, a primer layer on the layer containing the siloxane compound, and a polymer cover layer on the primer layer. The siloxane compound has a hydroxy group.

Abstract: Provided are a flexible tube for an endoscope, the flexible tube having good elasticity, good flexibility, and sufficient chemical resistance, an endoscopic medical device including the flexible tube for an endoscope, a method for producing the flexible tube for an endoscope, and a method for producing the endoscopic medical device. The flexible tube for an endoscope has a flexible-tube base that is tubular and that has flexibility and a polymer cover layer covering the flexible-tube base. The flexible-tube base has a spiral tube made of a metal strip and a tubular mesh member covering the spiral tube and made of braided metal wires, the tubular mesh member has a porosity of 2% to 10%, and the flexible tube has, between the flexible-tube base and the polymer cover layer, a primer layer including a silane coupling agent.

Abstract: Provided are a flexible tube for an endoscope, the flexible tube having a flexible tube base containing metal as a constituent material, a resin cover layer that covers an outer periphery of the flexible tube base, and a primer layer that includes a specific silane coupling agent and that is disposed between the flexible tube base and the resin cover layer, in which the resin cover layer includes at least one compound selected from the group consisting of polyamides, polyesters, polyurethanes, and polyolefins at least on a side of the resin cover layer in contact with the primer layer, an endoscopic medical device including the flexible tube for an endoscope, a method for producing the flexible tube for an endoscope, and a method for producing the endoscopic medical device.

Abstract: Provided are a flexible tube for an endoscope, the flexible tube having a flexible tube base made of metal, a resin cover layer that covers an outer periphery of the flexible tube base, and a primer layer that includes a silane coupling agent with a specific structure having an amino group and that is disposed between the flexible tube base and the resin cover layer, in which the resin cover layer includes at least one compound selected from the group consisting of polyamides, polyesters, and polyolefins on a side of the resin cover layer in contact with the primer layer, an endoscopic medical device including the flexible tube for an endoscope, a method for producing the flexible tube for an endoscope, and a method for producing the endoscopic medical device.

Abstract: A fluid flow control valve assembly which comprises a valve housing having defined therein a valve chamber defined therein a valve hole, inflow and outflow ports adapted to be communicated with each other through the valve chamber by way of the valve hole; and a valve rod inserted exteriorly of the housing and into the valve chamber and coupled with a handle for turning the valve rod about a longitudinal axis thereof thereby to move the valve rod in a direction coaxial with the longitudinal axis of the valve rod to adjust an opening of the valve hole. The valve rod includes a valve member formed on one end of the valve rod confronting the valve chamber and axially movably inserted in the valve hole, and a shank portion formed on a generally intermediate portion of the valve rod and slidably, but fluid-tightly sealing the valve chamber.