A single or multiple lumen catheter is disclosed which includes an expandable lumen. The expandable lumen is movable from a collapsed or sealed configuration to an open or expanded configuration. In the open configuration, the expandable lumen is dimensioned to receive a guidewire or stylet or facilitate the introduction of fluids into a patient.

A semiconductive roller (1) is produced by: preparing a rubber composition containing a rubber component including an NBR and an EPDM in a mass ratio of NBR/EPDM=70/30 to 30/70, at least one selected from the group consisting of SAF, ISAF and HAF, sulfur, a peroxide crosslinking agent and a sulfenamide accelerating agent; extruding the rubber composition into a tubular body; crosslinking the tubular body in a vulcanization can or with the use of a continuous crosslinking apparatus; and forming an oxide film (5) in an outer peripheral surface (4) of the tubular body by irradiation with ultraviolet radiation with a shaft (3) inserted through the tubular body.

The present disclosure relates to a multi-layered PEX pipe where the core layer or center layer is a cross-linked polyethylene PEX which is sandwiched between two stabilized Polyethylene layers that are not cross-linked. The core PEX-a layer is a major proportion of the pipe's cross sectional area and thus is the primary stress-bearing layer of the pipe product. The present disclosure also relates to a method of extruding all layers simultaneously to make a composite PEX pipe.

This invention relates to a polymeric pipe obtained by a peroxide crosslinking process. The pipe is formed from a composition comprising a polyolefin structural polymer, a peroxide initiator in an amount of from about 0.2% to about 5% by weight, and a co-agent in an amount of from about 0.02% to about 5% by weight. The co-agent comprises at least two reactive carbon-carbon double bonds. The invention also relates to methods of forming said pipes. The invention also relates to the use of a co-agent in a composition to reduce bubble formation in a peroxide crosslinking process. The invention also relates to the use of such polymeric pipes for the transport of water.

A heat-shrinkable tube according to an aspect of the present disclosure includes a base layer that is tubular and that covers outer peripheries of a plurality of electric wires, and a plurality of ridges that are formed on an inner peripheral surface of the base layer and that extend in an axial direction of the base layer.

The disclosure provides a runner protection tube for steel casting and a manufacturing method thereof. The runner protection tube for steel casting is made of a slurry composition for forming the runner protection tube for steel casting, the slurry composition includes organic fibers, inorganic fibers, thermosetting resins, thermoplastic resins, inorganic particles, inorganic binders, water, a lubricating oil and a hydrating agent.

A plant for producing an extruded silicone intermediate has a mixer/extruder for mixing and subsequently extruding a silicone compound for producing a raw silicone extrudate. A heating apparatus of the plant serves for crosslinking the raw extrudate to give the crosslinked silicone intermediate. The result is a plant with which a silicone intermediate of this kind can be produced more economically.

The invention relates to a blown film system for producing a film tube made of plastics material, comprising: an annular nozzle, out of which a plastic melt having a closed cross-section can be brought; a take-up device, by means of which the plastic melt can be drawn up from the direction of the annular nozzle so as to form the film tube; an air-provision device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and by means of which an amount of air can be provided; and a calibration device, which is downstream of the annular nozzle when viewed in the transport direction of the film tube and surrounds the film tube and by means of which the outer circumference of the film tube can be delimited. At least one detector is contained that has a plurality of detection elements, by means of which electromagnetic radiation emitted or reflected at various points of the film tube can be detected, such that at least one planar region and/or contoured region of the film tube can be detected with regard to characteristic properties, wherein the detector comprises at least 32 detection elements.