A catheter assembly is constructed by reflow bonding an inner liner and an outer layer. The inner liner defines at least one lumen. The inner liner is made of a gamma-irradiated polymeric material that includes a polyether block amide and a gamma radiation activated cross-linking agent.

Multilayer pipe comprising at least a first layer and a second layer, wherein the first layer is comprised a first polymer have a first thermal stability, and the second layer is comprised of a second polymer having a second thermal stability that is improved relative to said first thermal stability. In one exemplary embodiment, the first layer is comprised of PVC or CPVC, and the second layer is comprised of polycarbonate.

A stitched double layer composite hose is provided. The stitched double layer composite hose includes a middle fabric pipe layer, an inner surface composite colloid material layer and an outer surface composite colloid material layer. The structure of the fabric pipe layer is weft-stitched double-layer unit structure. The double-layer unit structure includes an outer layer, an inner layer and stitched wefts. The inner layer includes inner layer warps and inner layer wefts; the outer layer includes outer layer warps and outer layer wefts. The stitched wefts interweave with the outer layer warps and the inner layer warps for conjoining the inner layer and the outer layer together. The fabric pipe layer weaved solves problems of the stitched double layer composite hose in the fabric pipe layer of traditional casing, with such advantages as high flexibility, less weaving point, less loss of yarn strength and less degree of torsion.

A stitched double layer composite hose is provided. The stitched double layer composite hose includes a middle fabric pipe layer, an inner surface composite colloid material layer and an outer surface composite colloid material layer. The structure of the fabric pipe layer is weft-stitched double-layer unit structure. The double-layer unit structure includes an outer layer, an inner layer and stitched wefts. The inner layer includes inner layer warps and inner layer wefts; the outer layer includes outer layer warps and outer layer wefts. The stitched wefts interweave with the outer layer warps and the inner layer warps for conjoining the inner layer and the outer layer together. The fabric pipe layer weaved solves problems of the stitched double layer composite hose in the fabric pipe layer of traditional casing, with such advantages as high flexibility, less weaving point, less loss of yarn strength and less degree of torsion.

A catheter is made by coextruding first and second molten polymers, wherein the second molten polymer forms a flexible inner core and the first molten polymer forms exactly two bands on opposite sides of the inner core. The inner core is braided, and a third molten polymer extruded onto the braid to form a flexible jacket that encloses the braid, the bands and the inner core. The bands are more rigid than the inner core, and they provide preferential in-plane bending.

A catheter is made by coextruding first and second molten polymers, wherein the second molten polymer forms a flexible inner core and the first molten polymer forms exactly two bands on opposite sides of the inner core. The inner core is braided, and a third molten polymer extruded onto the braid to form a flexible jacket that encloses the braid, the bands and the inner core. The bands are more rigid than the inner core, and they provide preferential in-plane bending.

The present application discloses a polyvinyl alcohol composition, as well as a preparation method and polyvinyl alcohol medical catheter containing thereof, wherein raw materials include the following components: 60-90 parts of polyvinyl alcohol; 0.1-3 parts of glutaraldehyde; and the polyvinyl alcohol composition is made by mixing the polyvinyl alcohol in molten state with the glutaraldehyde in an acidic environment.

A device for determining the temperature of a tubular strand conveyed out of an extrusion device includes at least one temperature sensor configured to measure a first temperature of an outside of the tubular strand at a first position of the tubular strand. An evaluation apparatus further included and configured to compare the first temperature with a second temperature of the outside of the tubular strand at a second position of the tubular strand and determine at least one of a temperature within the tubular strand or a temperature on the inside of the tubular strand at a position of the tubular strand based on the comparison of the first and second temperature.

A method and apparatus for connecting pipe sections or repairing two separated pipe sections is provided, including for extruded chopped filament pipe (“ECFP”). An apparatus having a sealable connecting jacket is provided, which includes a mold configured to fit around a cut section of ECFP and receive a resin or other material through an input, and a curing system, such as a hot water intake surrounding the mold to heat and cure the resin forming the new pipe section.

A nozzle tool system for extrusion blow molding has an intermediate module and at least first and second nozzle outlet units, each forming an adjustable nozzle outlet gap between a mandrel extending axially and a deformable sleeve. The units can be connected with the intermediate module as replacements for one another, and have a first outlet diameter and a larger second outlet diameter different from one another. At least one setting drive for reversible deformation of the sleeve is arranged on the intermediate module and can be connected with the deformable sleeve by way of a releasable coupling arrangement. The first nozzle outlet unit delimits a first setting path of the setting drive, using at least one inner mechanical stop, and the second nozzle outlet unit delimits a second setting path of the setting drive, greater than the first setting path, using at least one inner mechanical stop.