Abstract:
PROBLEM TO BE SOLVED: To provide a thermo-adherent composition for coil wires which is greatly improved in thermomechanical properties, and coil wires coated with this thermo-adherent composition. SOLUTION: The thermo-adherent composition for coil wires includes a polyester type thermoplastic polyurethane. The coil wires comprise a conductive element that is positioned inside an insulating element coated with a thermo-adherent outer layer, wherein the outer layer is based on the thermo-adherent composition. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a photocrosslinkable composition to produce a material for a step-index plastic optical fiber. SOLUTION: This photocrosslinkable composition comprises an acrylate derivative selected from an acrylate, a methacrylate and an α-fluoroacrylate derived from a bisphenol compound, respectively, a photoinitiator and a crosslinking agent. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method of manufacturing a coated optical fiber ribbon having high productivity (reducing the time and cost for manufacturing a core wire) and enabling easy production. SOLUTION: The method of manufacturing the coated optical fiber ribbon 100 comprises the following steps: arranging N groups of optical fibers 1, 1' coming from a rewinding station 1000 wherein all the optical fibers 1, 1' are disposed in the same plane; applying a first layer of a first liquid resin settable under the action of UV (ultraviolet rays) type radiation onto each group of optical fibers 1, 1' by a die 2000 of a first chamber 2001; applying a second layer of a second liquid resin settable under the action of UV type radiation disposed to link together the adjacent first layer by the die 2000 of a second chamber 2002; and hardening the first layer forming subsets 10, 20 and the second layer forming a link matrix 4' by a UV type irradiation source 3000. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide a new power cable or an electric control cable structure which can be manufactured by the same tool as used in the manufacture of a cable as shown in Figure 1, and is small in size, light in weight, and has an excellent mechanical strength. SOLUTION: This relates to an electric control cable (1') having a cross-sectional diameter of 2 mm or less which includes a plurality of strands stranded so as to form a stranded conductor. Only a specific strand (20) of the stranded conductor is made of an electric conductive material, for example, copper, and the rest of the strands (40) are made of a non-conductive material such as polyimide, high-strength polyester, or polyether-imide. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fabricating method of a photo crystalline plastic optical fiber in which performance of the fiber is improved. SOLUTION: The fiber consists of a core and a clad. The clad is formed by cavities which are periodically arranged in a clad polymer matrix along the longitudinal direction. The fabricating method of the fiber consists of the following steps, i.e., a step in which a first composition (A) that is a precursor of the clad polymer and is liquid curable by the radiation of ultraviolet rays, is injected into first series of holes of an injection plate, a step in which a second composition (B) that does not react with the radiation of the ultraviolet rays and is selected from a liquid composition or a gas composition, is injected together with the composition (A) simultaneously into second series of holes of a plate having holes of the first series of holes arranged closest to the holes periodically arranged to form a flow and a step in which ultraviolet rays are radiated onto the flow to form the photo crystalline plastic optical fiber. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a method of fabricating a graded index optical fiber in which a desired refractive index gradient is properly controlled, and to provide a preform formation system executing the method. SOLUTION: The method comprisessteps: preparing at least two liquid compositions with different refractive indexes, each composition comprising at least one polymer, a substance adapted to vary the refractive indexes being present in at least one of the compositions and a cross-linking starter being present in at least one of the compositions, filling a preform formation system with the compositions, producing a liquid preform in the system, the refractive index of the preform having a given gradient, and drawing the preform to obtain the graded index plastics material optical fiber. The method is characterized in that the production of the preform comprises a step with substantially no flow of the compositions along the system. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To obtain a varnish that is a hybrid and a composite capable of manufacturing winding wires unexpectedly presenting an ability to withstand partial discharge that is greatly increased as compared with wires coated with a varnish of prior art, particularly at high temperatures. SOLUTION: This varnish composition is a varnish for the winding wires containing a copolymer obtained from a thermoplastic or a thermosetting resin and containing units derived from a silane and a mineral filler selected from the compounds of B, Al, Ti, Zn, Zr, Cr, Fe, a silicate and a mixture thereof. The resin is selected from among a polyamideimide(PAI), a polyesterimide(PE), a polyimide(PI), a polyester(PE), a polyurethane(PU) and a polyvinyl acetal(PVA). The varnish makes it possible to obtain the winding wires of lifetime that is increased by having an improved ability to withstand the partial discharge and voltage peak even at high temperatures. The varnish composition is applicable to the manufacturing of coils, in particular for variable frequency controllers and converters.
Abstract:
The present invention relates to an electrical control cable (1) comprising a core (10) made of a non-conducting material and a plurality of copper strands (20) extending along the longitudinal direction of said core, the copper strands (20) being uniformly distributed concentrically around the perimeter of said core (10) in order for them to penetrate only partly into said core and for each of them to provide a part accessible from the outside of said perimeter. According to the invention, said copper strands (20) are partly embedded in the material forming the core (10) and extend parallel to the longitudinal direction of said core (10). Advantage: simplified manufacture and copper saving, while still allowing facilitated access to the copper for subsequent crimping of the cable for the purpose of connecting it.
Abstract:
The invention relates to a fire-resistant cable comprising at least one conductive element which extends inside at least one insulating coating. The invention is characterised in that at least one insulating coating is made from a fire-resistant composition comprising a polymer and a fibrous phyllosilicate.
Abstract:
L'invention se rapporte à un câble (1,10) électrique comprenant au moins trois conducteurs (2) non alignés et une gaine extérieure commune (4,14) entourant lesdits conducteurs (2). La principale caractéristique d'un câble selon l'invention, est que chaque conducteur (2) est en contact avec au moins deux autres conducteurs (2), et en ce que la gaine extérieure (4,14) épouse étroitement la forme des conducteurs (2) en présentant des bosses (5) et des gorges (6,16), ladite gaine (4,14) représentant la couche la plus externe dudit câble (1,10).