摘要:
An optical fiber cable including an optical fiber ribbon in a pipe, wherein the ribbon includes at least two optical fibers arranged side by side, and wherein at least two of the optical fibers are bonded intermittently along a length of the fibers.
摘要:
A fiber optic cable comprises at least one elongated optical fiber situated in a fiber nest having a plurality of filaments collectively surrounding the optical fiber. The cable further includes a structural member at least partially surrounding the optical fiber but spaced apart from the optical fiber in a radial direction such that at least some of the filaments of the fiber nest are positioned between the optical fiber and the structural member. The foregoing elements are encased in an outer jacket.
摘要:
A sizing agent for reinforcement fibers which imparts good bonding performance to a reinforcement fiber is used to reinforce thermoplastic matrix resin, and provide a synthetic fiber strand applied with the sizing agent and a fiber-reinforced composite reinforced with the synthetic fiber strand. The sizing agent essentially contains a neutralization product of a modified polypropylene resin and an amine compound having at least two hydroxyl groups or amino groups in the molecule, and the nonvolatile component of the sizing agent exhibits an endothermic heat of fusion not higher than 50 J/g in determination with a differential scanning calorimeter (DSC).
摘要:
An optical fiber cable 1 includes: a cable core 9 formed by stranding a plurality of loose tubes 7, each housing at least one optical fiber 5, on the periphery of a centered tension member 3; and a sheath 11 disposed on the outer periphery of the cable core 9. The sheath 11 includes: a first sheath portion 13 in which the sheath is embedded in between each of the loose tubes 7; and a second sheath portion 15, in which the sheath 11 is circumscribed around the cable core 9, to be thereby formed in a pipe shape. The first sheath portion 13 and the second sheath portion 15 are alternately positioned over the entire length of the cable core 9.
摘要:
A hybrid welding apparatus for subjecting a base metal to gas-shielded arc welding and laser welding comprises a laser generator for emitting a laser beam and a condenser optical system for condensing the laser beam to laser weld the base metal. The condenser optical system includes a plurality of lenses, each having a hole portion in the center thereof. A tubular supply holder for supplying a welding wire is passed through these respective hole portions of the lenses and located substantially coaxially with the axis of the condenser optical system. The laser beam and welding wire to be applied to the base metal are arranged coaxially, so that laser-welding and arc-shielded welding can be simultaneously performed with a wide angle between the welding head and a bevel of the base metal, thereby deepening penetration of the weld at an increased welding speed.
摘要:
A polygon scanner has a lighter rotating shaft on which a polygon mirror is mounted, to prevent a positional deviation of the polygon mirror from the rotating shaft in high speed rotation, in which the rotating shaft is supported through a dynamic pressure air bearing on a fixed shaft, in which the polygon mirror and motor constituent members are mounted on the rotating shaft, and in which the rotating shaft and the polygon mirror are made of respective light weight materials matched with each other in coefficient of thermal expansion, for example of aluminum or an aluminum alloy. Further, an anodic oxide film is formed at least on a portion where the rotating shaft could contact with the fixed shaft, and floating means is provided for constantly floating the rotating shaft relative to the fixed shaft upward in an axial direction thereof. A process for producing the polygon scanner comprises making a predetermined masking on a portion where the rotating shaft could contact with the fixed shaft, prior to an anodic oxidation treatment to form an anodic oxide film on the portion, and then performing the anodic oxidation treatment, whereby, during the treatment, forming an anodic oxide film and a pattern of recesses and protrusions for dynamic pressure generation corresponding to a pattern of the masking, which are constituent elements of a dynamic pressure air bearing.
摘要:
An optical deflector of an air bearing type has a fixed shaft; a rotary shaft having a hollow portion fitted onto the fixed shaft; a support device disposed between an end portion of the fixed shaft and an end portion of the hollow portion opposite thereto and supporting the rotary shaft in an axial direction thereof; a radial air bearing formed between an inner circumferential face of the hollow portion and an outer circumferential face of the fixed shaft; a polygon mirror fixed to the rotary shaft; a driving device for rotating the rotary shaft; a device for deflecting light irradiated onto the polygon mirror by rotating the rotary shaft through the driving device; a device for forming a flange for fixing the polygon mirror thereto integrally with the rotary shaft; and a device for setting an upper end portion of the support device on a fixed shaft side thereof to be lower than an upper end face of the polygon mirror. The support device has a first magnet directly attached onto an end face of the fixed shaft, a second magnet opposite to the first magnet and attached to the hollow portion of the rotary shaft, and a third magnet opposite to the second magnet and attached to a casing for covering the polygon mirror. Magnetic poles of the first, second and third magnets are opposite to each other to generate magnetic repulsive force.
摘要:
A sizing agent for reinforcement fibers which imparts good bonding performance to a reinforcement fiber is used to reinforce thermoplastic matrix resin, and provide a synthetic fiber strand applied with the sizing agent and a fiber-reinforced composite reinforced with the synthetic fiber strand. The sizing agent essentially contains a neutralization product of a modified polypropylene resin and an amine compound having at least two hydroxyl groups or amino groups in the molecule, and the nonvolatile component of the sizing agent exhibits an endothermic heat of fusion not higher than 50 J/g in determination with a differential scanning calorimeter (DSC).
摘要:
An acrylic-fiber finish for use in carbon-fiber production contributes to high tenacity of resultant carbon fiber. The acrylic-fiber finish for carbon-fiber production includes an epoxy-polyether-modified silicone and a surfactant. The weight ratios of the epoxy-polyether-modified silicone and the surfactant in the total of the non-volatile components of the finish respectively range from 1 to 95 wt % and from 5 to 50 wt %. The carbon fiber production method includes a fiber production process for producing an acrylic fiber for carbon-fiber production by applying the finish to an acrylic fiber which is a basic material for the acrylic fiber for carbon-fiber production; an oxidative stabilization process for converting the acrylic fiber produced in the fiber production process into oxidized fiber in an oxidative atmosphere at 200 to 300 deg.C.; and a carbonization process for carbonizing the oxidized fiber in an inert atmosphere at 300 to 2,000 deg.C.
摘要:
A finish for acrylic fiber to be processed into carbon fiber includes an ester compound having at least three ester groups in its molecule and a silicone compound, wherein the silicone compound constitutes 10 to 50 weight percent of the whole of the nonvolatile matter of the finish. A method of manufacturing carbon fiber includes the processes of applying the finish for acrylic fiber to be processed into carbon fiber to acrylic fiber to be processed into carbon fiber; oxidative-stabilizing the finish-applied acrylic fiber in an oxidizing atmosphere at 200 to 300 deg. C. to convert the fiber into oxidized fiber; and carbonizing the oxidized fiber in an inert atmosphere at 200 to 3000 deg. C.