摘要:
The present invention's optical cable is provided with optical fibers, a forming pipe for housing the optical fibers, a sheath provided around the forming pipe, and at least one pair of rip cords embedded in the sheath. The forming pipe is formed of a plurality of tapes so that it is dividable along its longitudinal direction. When dividing the optical cable, the rip cords are pulled to tear open the sheath, and the already split forming pipe is divided while staying adhered to the respective parts of the sheath. As a result, the division of the sheath and the forming pipe is carried out in one stroke, so that the optical fibers inside the forming pipe can be exposed easily and quickly.
摘要:
An optical cable formed by optical fibers, a forming pipe, a sheath, a pair of tension members, and a pair of rip cords. The forming pipe includes a plurality of tapes arranged to permit the forming pipe to be divided in the longitudinal direction and the rip cords are located near the seams of the forming pipe. A distance from the surface of the tension members to the inner surface of the sheath and to the outer surface of the sheath are both 0.3 mm or more. A distance from the center of the rip cords to the inner surface of the sheath is from 0.2-fold or greater to 1.2-fold or less than the radius of the tip cords. Furthermore, the distance from the surface of the rip cords to the seams of the forming pipes is 0.5 mm or less.
摘要:
A sensing cable is provided which includes exposed and/or unexposed optical fibers or wires disposed through the length of the sensing cable. The sensing cable includes a slotted core which is a one-piece integral member having a plurality of channels formed on a perimeter of the slotted core and which extend along a length of the slotted core. The sensing cable includes at least one exposed component which is disposed in a first channel of the plurality of channels and which extends along a length of the first channel. The sensing cable includes at least one unexposed component which is encased by a protective member, and the unexposed component and the protective member are disposed in a second channel of the plurality of channels. The unexposed component and the protective member extend along a length of the second channel.
摘要:
A sensing cable is provided which includes exposed and/or unexposed optical fibers or wires disposed through the length of the sensing cable. The sensing cable includes a slotted core which is a one-piece integral member having a plurality of channels formed on a perimeter of the slotted core and which extend along a length of the slotted core. The sensing cable includes at least one exposed component which is disposed in a first channel of the plurality of channels and which extends along a length of the first channel. The sensing cable includes at least one unexposed component which is encased by a protective member, and the unexposed component and the protective member are disposed in a second channel of the plurality of channels. The unexposed component and the protective member extend along a length of the second channel.
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:
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:
An extrusion-molding apparatus for a loose tube includes: an extrusion head that includes a tip and a die concentrically arranged therewithin and extrudes a tube between the tip and the die; a needle that feeds at least one optical fiber and filler to be filled around the optical fiber into the tube being extrusion-molded; and a cylindrical bundling member provided within the needle. The bundling member has a bundling hole being smaller than an inner diameter of the tube at a center thereof and into which the optical fiber can pass through, and a flow pass penetrating along a feeding direction of the filler between the bundling hole and an inner circumferential surface of the needle. In an extrusion molding method using the extrusion-molding apparatus, the optical fiber is passed through a bundling hole to be bundled at an almost center of the tube. In addition, filler is passed through a flow path to be filled around the optical fiber.
摘要:
An extrusion-molding apparatus for a loose tube includes: an extrusion head that includes a tip and a die concentrically arranged therewithin and extrudes a tube between the tip and the die; a needle that feeds at least one optical fiber and filler to be filled around the optical fiber into the tube being extrusion-molded; and a cylindrical bundling member provided within the needle. The bundling member has a bundling hole being smaller than an inner diameter of the tube at a center thereof and into which the optical fiber can pass through, and a flow pass penetrating along a feeding direction of the filler between the bundling hole and an inner circumferential surface of the needle. In an extrusion molding method using the extrusion-molding apparatus, the optical fiber is passed through a bundling hole to be bundled at an almost center of the tube. In addition, filler is passed through a flow path to be filled around the optical fiber.
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 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).