摘要:
A reinforced flexible hose comprising as least a first inner extruded tubular layer and at least a second extruded tubular layer with a tubular reinforcement fabric provided between said first and second hoses. The two tubes are joined so as to form a homogeneous unit by their mutual contact surfaces, by gluing or molecular adhesion, for example. The end portion of the hose increases in width so much as to make it possible to achieve a better mechanical hold with the standard junctions to which it is bound to be fixed. The thickness increases at the end portions may either be constant along its whole length, or start gradually toward the end.
摘要:
A vascular prosthesis is constructed from a structure having interconnected, helically oriented channel-porosity to allow oriented ingrowth of connective tissue into a wall of the prosthesis. The prosthesis can have a small internal diameter of 6 mm or less. Several different methods can be used to produce the prosthesis, including a fiber winding and extraction technique, a melt extrusion technique, and a particle and fiber extraction technique using either a layered method or a continuous method. Furthermore, mechanical properties of the prosthesis are matched with mechanical properties of the host vessel, thereby overcoming problems of compliance mismatch.
摘要:
A prepreg material infused with a bulk resin, where the bulk resin has shape memory alloy (SMA) particles intermixed in the resin to toughen the material when the material is used in an application and is cured. The SMA particles may be of various shapes and sizes. The material may form a prepreg fabric having interwoven fibers or a prepreg unidirectional tape having fibers oriented unidirectionally. Opposing surfaces of the material may be infused with quantities of bulk resin having different concentrations of SMA particles. The SMA particles may be mixed in the bulk resin while in their austenitic or martensitic states to suit the needs of specific applications.
摘要:
An extrusion system for extruding a layer of a plastic or rubber material onto a work piece without having to continuously adjust the extrusion system during the “set-up” mode to “full-run” mode, wherein the extruded layer exhibits a predetermined cross-section size and a uniform wall gauge concentricity.
摘要:
A preformed strip (20) of unvulcanized rubber having a plurality of strand receiving grooves (22) for splicing the ends (11, 12) of steel cord or strand reinforced rubber conveyor belts (10) is disclosed along with a method of forming the spliced joint.
摘要:
The present invention discloses the extrusion of a thermally conductive polymer composition containing a continuous core of carbon fiber reinforcing. The material is created in a machine that is configured to hold a spool containing a continuous strand of carbon fiber core material. The carbon fiber strand is unrolled off the spool and is fed into a preheating chamber to bring the temperature of the strand to a pre-designated level. The strand is then fed into a port in an extruding head on a pressure extruding machine. A molten polymer matrix is also fed into the extruding head thereby extruding the polymer matrix onto, around and between the individual carbon fibers contained in the strand. The singular extruded composite strand that emerges from the extrusion head is then cooled and deionized before cutting the composite strand into pellets of a desired length for further processing and use as injection molding feedstock. The resulting composite pellets include continuous fiber reinforcing with fiber lengths that extend for the entire length of the pellet.
摘要:
A method of manufacturing a security item comprises casting a polymer plastics substrate. During the casting process, a security material such as a thread is supplied which is embedded in the substrate.
摘要:
Resin soaked fiberglass strands are applied to abrasively cleaned steel pipe to increase the hoop stress. Steel pipe that is abrasively cleaned is preheated and a primer coat is applied. Fiberglass strands that are soaked with heated resin are then applied in a helical method to the pipe to induce an accelerated cure of the resin. Followed by a polyethylene wrap to protect the ouside of the composite. Allowing the coated pipe to be driven over a conveyor line. This process is continuous in which the steel pipe is wrapped from end to end, on pipe that is connected with a come-along (steel or plastic).
摘要:
The instant invention involves a process used in preparing fibrous tows which may be formed into polymeric plastic composites. The process involves the steps of (a) forming a carbon fiber tow; (b) forming a thermoplastic polymeric fiber tow; (c) intermixing the two tows; and (d) withdrawing the intermixed tow for further use.
摘要:
Reinforcing bands of high tensile strength filaments in a cured resin matrix are in the shape of a coil having a plurality of elastic convolutions for reinforcing a weakened pipe. Areas of depressions on the exterior surface of the pipe are filled with a load transfer filler material and the bands are coiled around the pipe with adhesive holding an innermost convolution of the coil to the pipe and subsequent convolutions of the coil to adjacent convolutions. A plurality of the bands are placed in abutment with one another to cover the entire weakened area of the pipe.