摘要:
A hollow fiber membrane fluid transport device and its method of manufacture are disclosed wherein the fibers are comprised of Polytetrafluoroethylene (PTFE), and the potting materials are comprised of fluorocopolymer and or fluoroterpolymer based materials. The potting method described herein, utilizes a compressed chemically resistant fluorocopolymer and or fluoroterpolymer film, allows for ease of manufacture without destruction of the PTFE hollow fibers, with high packing densities, and without the processing complexity of pre-melting, extruding, or chemical crosslinking of any polymeric adhesives. Furthermore, the PTFE hollow fibers can be treated with a fluoropolymeric solvent solution before the chemically resistant film is applied to enhance the adhesion of the PTFE fiber to the film. PTFE hollow fibers, and its respective fluoro-co and terpolymers as potting films, impart high packing densities, superb chemical resistance and temperature resistance without membrane contamination, or low fiber pull strength, as is sometimes observed with standard potting materials such as polyurethane and epoxy.
摘要:
The present disclosure provides various embodiments of methods of forming a tapering distal tip for a catheter. An exemplary method includes providing a mandrel and a holding hypotube, placing a tip first material with a first outer diameter over the mandrel and the hypotube, placing a tip second material with a second outer diameter over the mandrel and under the first material, placing a shrink tube of heat-shrink material around at least a junction of the first material and second material, heating the shrink tube, cooling the first material and second material, and removing the shrink tube and the hypotube. The first outer diameter is greater than the second outer diameter.
摘要:
A pipe connection comprises a connecting piece (2), a pipe (1) and a clamping ring (6). The pipe (1) and the clamping ring (6) are made of a material having memory properties. An end of the pipe (1) and the clamping ring (6) have been reversibly expanded co-jointly and firmly and sealingly shrunk to the connecting piece (2) by back shrinkage. The clamping ring (6) is made from a crosslinked polyolefin by injection molding.
摘要:
A method and apparatus for bonding a pair of tubular members are disclosed. First and second end portions of the tubular members are gripped for rotation about their axis. The tubular members are axially rotated and a laser beam is directed radially toward the tubular members to bond them together.
摘要:
The method involves arranging a catheter balloon (1) on a catheter shaft (2), applying a pre-fixing element (4) for pilot attachment of the balloon to the desired fixing point on the shaft, arranging a welding energy absorbing device (5) near the fixing point of the balloon on the shaft, irradiating the absorbing device with radiation energy (L) and removing the absorbing device after welding the balloon to the shaft.
摘要:
Zur Verbesserung der Verschweißungsqualität einer Verschweißung zwischen einem Katheterballon (1) und einem Katheterschaft (2) eines Ballonkatheters (3) wird erfindungsgemäß vorgeschlagen, nach Anbringung einer Vorfixierung (4) eine Schweißenergie-Absorbier-Einrichtung (5, 5'), vorzugsweise in Form eines gefärbten Schlauches im Bereich einer Fixierungsstelle (V) anzuordnen und danach diese Schweißenergie-Absorbier-Einrichtung (5, 5') mit der Strahlungsenergie (L) zu bestrahlen, um die Verschweißung durchzuführen. Nach der Verschweißung werden die Vorfixierung (4) und die Schweißenergie-Absorbier-Einrichtung (5, 5') entfernt.
摘要:
Described herein are a container for pressurized fluids (1) and a corresponding method of fabrication. The container (1) comprises a body (2) provided with a mouth and formed by a multilayer wall made of plastic or synthetic material (2). Inside the inlet there is inserted a terminal element (4), on the outer surface of which there is defined at least one depression (4B, 4C); on the outside of the mouth there is fitted at least one annular element made of shape-memory alloy (5, 6), in a position aligned with respect to the depression (4B, 4C). The wall is locally deformed at the mouth, towards the inside of the depression (4B, 4C), via an action of radial tightening produced by the annular element made of shape-memory alloy (5, 6).
摘要:
The invention relates to a composite component consisting of two or more profiles (1) and (2) and to a method for the production thereof. According to the invention, at least one profile (1), with one free end, abuts against the second profile (2) or is inserted into the second profile (2). The invention is characterized in that reinforcing elements (3, 3'; 6, 6'; 23; 25; 21), which form a positive engagement with profiles (1) and (2), are provided in the area of the junction (10) of profiles (1) and (2), and profiles (1) and (2) are interconnected by a thermoplastic material that is sprayed or shrunk on in the area of the junction (10).
摘要:
An exercise and/or play hoop, made of semi-rigid plastic tubing, is partially filed with water (30) to between 1/6 and 1/2 full, most preferably 1/4 full. The water improves the dynamics of the hoop and makes it easier to keep the hoop elevated by gyration. The hoop is made of a length of hoop tube (10) bent into a circle. A coupling tube (20) is inserted where the ends (11, 12) abut, spanning the joint. The coupling tube includes a bore (25) through which the liquid flows circumferentially around inside the hoop, and past the joint. The joint is sealed with a shrink-plastic tube. A decorative, preferably iridescent cover (18) may cover the hoop.