WO2004066008A1 - Unite a fibre optique pour installation de soufflage d'air, procede et appareil pour sa fabrication - Google Patents

Unite a fibre optique pour installation de soufflage d'air, procede et appareil pour sa fabrication Download PDF

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Publication number
WO2004066008A1
WO2004066008A1 PCT/KR2004/000118 KR2004000118W WO2004066008A1 WO 2004066008 A1 WO2004066008 A1 WO 2004066008A1 KR 2004000118 W KR2004000118 W KR 2004000118W WO 2004066008 A1 WO2004066008 A1 WO 2004066008A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical fiber
fiber unit
protective layer
air blown
concave strip
Prior art date
Application number
PCT/KR2004/000118
Other languages
English (en)
Inventor
Bong-Hoon Lee
Chan-Yong Park
Original Assignee
Lg Cable Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lg Cable Ltd. filed Critical Lg Cable Ltd.
Publication of WO2004066008A1 publication Critical patent/WO2004066008A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/658—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing
    • E01F9/673—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by means for fixing for holding sign posts or the like
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4401—Optical cables
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/4438—Means specially adapted for strengthening or protecting the cables for facilitating insertion by fluid drag in ducts or capillaries
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
    • E01F15/003—Individual devices arranged in spaced relationship, e.g. buffer bollards
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
    • E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
    • E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
    • E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
    • E01F9/608—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings for guiding, warning or controlling traffic, e.g. delineator posts or milestones
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4485—Installing in protective tubing by fluid drag during manufacturing

Definitions

  • the present invention relates to an optical fiber unit, and more particularly to an
  • optical fiber unit for air blown installation and its manufacturing method and apparatus.
  • optical fiber is broadly used for long-distance rapid transmission owing to its low transmission loss and great bandwidth. However, since the optical fiber itself is very weak to external impact or bending, the optical fiber is drawn in a fiber shape and
  • An optical cable has 6xn or 12xn optical fibers, and the
  • optical fibers is generally much more than required at the installation point on
  • optical fiber or optical cable is applied in the future. Thus, laying a large amount of
  • Air Blown Fiber This technique called Air Blown Fiber (hereinafter, referred to as ABF) is conducted in a way of laying a polymer tube having a diameter of 5 to 8 mm, called a micro tube or duct, with a special configuration for lubrication in advance so that an optical fiber may be additionally installed when required, and then installing a optical fiber unit having 1 to 12 cores into the tube as much as a desired length by blowing it by air pressure.
  • This ABF is advantageously easy to install and remove together with small size and good flexibility, so an initial installation cost is reduced and an additional installation also gives a less burden.
  • the ABF may be easily upgraded, thereby attracting much attention.
  • the ABF is particularly suitable for indoor use such as FTTH (Fiber To The Home) and home network. Since the tube used for installing the ABF is laid in advance, the ABF hardly suffers from area restrictions though there is no sufficient installation space to spare in the tube. Now, a general procedure related to installation of the ABF is described.
  • the.optical fiber unit has configuration and material on its outer surface, which is capable of maximizing the fluid drag force.
  • installation features such as installation length or minimum installation radius are changed depending on the configuration and material of the ABS outer surface, the shape and material design of the outer surface is very
  • US5,042,907 proposes an optical fiber unit using glass beads 5 on its outer
  • the glass beads 5 are stirred
  • the optical fiber unit has a relatively bad bend characteristic, and cracks are apt to
  • FIG. 2 shows a technique proposed in US5,555,335 as another prior art.
  • the glass beads are blown to a resin after the resin is coated on the optical fiber 1 but before being cured so that the glass beads are attached to the outer surface 6 of the optical fiber by static electricity.
  • the adhering strength is not uniformly distributed between the glass beads and the outer surface of the optical fiber, so it is hardly applied to the actual procedure.
  • these glass beads may damage an optical fiber unit or cause critical problem to the human body since a worker may inhale the glass beads.
  • US5,441,813 proposed a technique of forming a dimple on the surface of an optical fiber with the use of foaming polymer materials so that the optical fiber unit may receive more air pressure.
  • the foaming polymer materials may increase frictional coefficient of the ABF outer surface, so a short length can be installed at once.
  • the polymer materials deteriorate low temperature characteristics and strength of the optical fiber unit.
  • the present invention is designed to solve the problems of the prior art, and therefore an object of the invention is to provide an optical fiber unit for air blown installation which is capable of receiving more fluid drag force without generating a direction during the air blown installation, and be manufactured more safely because of not using the conventional fine particles such as glass or ceramic.
  • the present invention provides an optical fiber unit for air blown installation, which is installed into a tube, the optical fiber unit including: at least one optical fiber, each having a core and a clad; and a protective layer for surrounding the optical fiber, wherein at least one concave strip is formed on an outer surface of the protective layer along a longitudinal direction of the protective layer.
  • the concave strip may be formed on the outer surface of the protective layer in a spiral, waved or zigzag pattern. Furthermore, the concave strip may also be formed discontinuously.
  • the concave strip may have a sectional shape of triangle, semicircle, arc or rectangle.
  • the optical fiber unit comprises a plurality of optical fibers, and the plurality of optical fibers are provided in the protective layer in a ribbon type, and a tension reinforcing member may be further provided in a ribbon type together with the ribbon-type optical fiber to reinforce tensile force.
  • the protective layer may be composed of only a buffer layer, or a buffer and a sheath, or a buffer layer, an intermediate layer and a sheath.
  • an least an outermost layer of the protective layer on which the concave strip is formed preferably has a secant modulus of 100 to 1000 MPa at 2.5%
  • the method including: supplying an optical fiber unit having at least one optical
  • the concave strip forming step is conducted by a mechanical
  • the mechanical processing machine forms the concave strip on the outer surface of the protective layer by means of groove cutting.
  • the mechanical processing machine may conduct the groove cutting with rotating in one direction while the optical fiber unit is moving in order to form a spiral
  • the mechanical processing machine may conduct the
  • optical fiber unit having a concave strip on its outer surface as
  • optical fiber unit for air blown installation which includes the steps of: passing at least one optical fiber, each having a core and a clad, through a coating die in which at least one protrusion having a predetermined shape is formed in an inner hollow
  • an apparatus for manufacturing an optical fiber unit for air blown installation which is installed into a tube, which includes a supply unit for supplying an optical fiber unit having at least one optical fiber and at least one protective layer surrounding the optical
  • a cutting unit for forming at least one concave strip on an outer surface of the
  • the optical fiber unit having a concave strip on its outer surface as
  • an optical fiber unit for air blown installation which includes: a supply unit for supplying at least one optical fiber, each having a core and a clad; a coating die
  • the coating die supplying a polymer
  • the take-up device for winding an optical fiber unit in which the protective layer is formed by the coating die, wherein the coating die has at least one protrusion of a predetermined
  • FIG. 1 is a sectional view showing an optical fiber unit according to the prior art
  • FIG.2 is a sectional view showing another optical fiber unit for air blown
  • FIG. 3 is a perspective view showing an optical fiber unit for air blown installation according to an embodiment of the present invention
  • FIG. 4 is a perspective view showing an optical fiber unit for air blown
  • FIG. 5 is a perspective view showing an optical fiber unit for air blown installation according to still another embodiment of the present invention.
  • FIGs. 6a to 6f are sectional views showing various optical fiber units on the
  • FIGs. 7a to 7c are sectional views showing optical fiber units, each having an
  • optical fiber ribbon on the surface of which various shapes of concave strips are formed
  • FIG. 8 is a schematic view showing equipment for manufacturing an optical fiber unit according to an embodiment of the present invention.
  • FIG. 9 is a schematic view showing equipment for manufacturing an optical fiber unit according to another embodiment of the present invention.
  • FIG. 3 is a perspective view showing an optical fiber unit for air blown
  • the optical fiber unit of the present invention has at least one optical fiber 10 and a
  • the optical fiber 10 is a quartz or plastic optical fiber, which has a core and a clad.
  • at least one optical fiber 10 is provided in a single core type or a
  • a coloring coating may be formed for protection of the optical fiber. These coating layers play a role of protecting the inner layer from dusts or moisture, and are made of silicon or similar buffer materials.
  • a coloring coating may be formed as the second coating layer.
  • the layer for identifying the kind of optical fiber may be used. If sufficient strippability is required according to the kind of polymer resin applied to the coloring coating layer, jelly or silicon oil for an optical cable may be coated on the outer surface of the coloring coating layer.
  • the protective layer 20 is formed around the aforementioned optical fiber 10, or
  • the protective layer 20 may be composed of one layer, or it is also possible to laminate
  • the protective layer 20 has a dual configuration having a buffer layer 22 and a sheath 24, as an
  • the buffer layer 22 is a protective layer which directly surrounds the optical fiber 10
  • the sheath 24 is a protective layer on which a concave strip 30 described later is formed.
  • the protective layer 20 of the present invention however
  • the protective layer 20 may include only the buffer layer 22, or additionally include an
  • protective layer 20 plays various rolls such as protecting the optical fiber, ensuring
  • a concave strip 30 is formed for
  • the concave strip 30 is formed
  • the concave strip 30 is
  • the concave strip 30 is formed on the outer surface of the protective layer 20 along a longitudinal direction of the protective layer 20. In addition, though it is depicted on the drawings that only one concave strip 30 is formed on the outer surface
  • the concave strip 30 may be formed straightly on the outer surface of the protective layer 20, it is more preferable that the concave strip 30 has a curved pattern so as to receive more air pressure during the air blown
  • FIG. 3 shows as an example that the concave strip 30 is spirally formed
  • the concave strip 30 is formed by processing successive grooves on the outer surface of the protective layer 20 by means of mechanical processing. At this time, the
  • sectional shape of the concave strip 30 is determined by the shape of a cutting tool used
  • the concave strip 30 decreases a contact area
  • the concave strip 30 formed as described above helps the optical fiber unit be
  • the resistance against the air pressure is more increased than the concave strip has a straight pattern.
  • the present invention does not need to attach particles such as polymer
  • FIG. 4 shows an optical fiber unit according to another embodiment of the
  • optical fiber unit of this embodiment is similar to that of FIG. 3,
  • a concave strip 40 formed on the surface of the protective layer 20 has a different pattern.
  • the concave strip 40 has a waved pattern on the outer
  • the concave strip 40 of this embodiment receives air resistance in both opposite directions alternatively so that the optical fiber unit may be installed without twisting.
  • the concave strip 40 has a waved pattern
  • the present invention is not limited to that case.
  • the concave strip may have various patterns such as a zigzag pattern or a trapezoidal pattern.
  • FIG. 5 shows an optical fiber unit according to still another embodiment of the present invention.
  • the optical fiber unit of this embodiment is similar to ones shown
  • the concave strip 50 has a discontinuous waved pattern on
  • concave strips 50 are formed on the outer surface of the protective layer 20. If such a discontinuous waved concave strip 50 is formed as mentioned above, an air flow around
  • the concave strip 50 receives resistances in both opposite directions alternatively, as in
  • embodiment also has an advantage that it may be installed without twisting due to the alternative resistances.
  • strip 50 has a waved pattern
  • the present invention is not limited to that case.
  • spiral concave strip 30 shown in FIG. 3 is discontinuously formed.
  • the processing device 5 may obtain such patterns by means of operation methods of a processing device used for forming the concave strips. That is to say, if the processing device is rotated in only one direction while a concave strip is formed, the spiral concave strip 30 shown in FIG. 3 is formed, while if the processing device is rotated alternatively in both opposite
  • the waved concave strip 40 shown in FIG. 4 is formed.
  • the discontinuous concave strip 50 shown in FIG. 5 is formed.
  • the concave strip may have various patterns besides the aforementioned patterns, and the operation method of the processing device
  • FIGs. 6a to 6f show optical fiber units configured so that a single-core or two-core optical fiber is surrounded by various kinds of protective layers.
  • the optical fiber unit shown in FIG. 6a includes the optical fiber 10 therein,
  • the buffer layer 22 is provided around the optical fiber 10 as a protective layer.
  • the aforementioned concave strip 30 is formed on the outer surface of the buffer layer 22.
  • buffer layer 22 may have various patterns such as spiral or waved patterns, and its
  • section may also adopt various shapes.
  • the optical fiber unit of FIG. 6a has the simplest configuration of an optical
  • the buffer layer 22 is preferably made of harder
  • the buffer layer 22 used in this embodiment is a general one for ensuring rigidity of the optical fiber unit and easy processing of the concave strip 30.
  • the buffer layer 22 used in this embodiment is a general one for ensuring rigidity of the optical fiber unit and easy processing of the concave strip 30.
  • the optical fiber unit shown in FIG. 6b is similar to that of FIG. 6a, except that a
  • the sheath 24 is formed on the outer surface of the sheath 24, which is the outermost layer of the optical fiber unit. In this embodiment, since the sheath 24 is formed around the buffer layer 22, the sheath 24 is formed around the buffer layer 22, the sheath 24 is formed around the buffer layer 22.
  • buffer layer 22 may be made of materials generally used in the art. Meanwhile, a
  • the optical fiber unit may not be
  • sheath 24 is preferably in the range of 400 to 1000 MPa at 2.5% strain, more preferably 500 to 800 MPa at 2.5% strain.
  • the optical fiber unit shown in FIG. 6c is configured so that an intermediate
  • the intermediate layer 26 is added to the optical fiber unit of FIG. 6b.
  • the intermediate layer 26 is
  • layer 26 plays a role of protecting the optical fiber by preventing the crack from being
  • the concave strip 30 is
  • the optical fiber unit shown in FIG. 6d is similar to that of FIG. 6b, except that a first coating layer 12 and a second coating layer 14 are additionally formed between the optical fiber 10 and the buffer layer 22.
  • the first coating layer 12 acts for protecting the optical fiber 10
  • the second coating layer 14 is a coloring coating layer for identifying the optical fiber 10.
  • a modulus of the sheath 24 is
  • the concave strip 30 is formed on the outer surface of the sheath 24, which is positioned outermost in the optical fiber unit.
  • optical fiber unit shown in FIG. 6e is similar to that of FIG. 6d, except that
  • a modulus of the sheath 24 is preferably in the range of 400 to 1000 MPa
  • the concave strip 30 is formed on the outer surface of the sheath 24, which
  • optical fiber unit is positioned outermost in the optical fiber unit.
  • FIGs. 6a to 6e show as an example that only one optical fiber 10 is used in the
  • optical fiber unit i.e. a single-core optical fiber unit.
  • present invention is
  • the present invention is not limited to the single-core optical fiber unit.
  • the present invention is not limited to the single-core optical fiber unit.
  • the present invention is not limited to the single-core optical fiber unit.
  • the present invention is not limited to the single-core optical fiber unit.
  • FIG. 6f it is depicted as an example that a protective layer of the optical fiber unit has a similar configuration to that of FIG. 6e, and two optical fibers 10 are located in the protective
  • each optical fiber 10 is surrounded by the first coating layer 12 and the coloring coating layer 14.
  • a modulus of the sheath 24 is preferably in the range of 400 to 1000 MPa at 2.5% strain, more preferably 500 to 800 MPa at 2.5% strain.
  • the concave strip 30 is formed on
  • embodiments may be formed in various patterns such as spiral and waved patterns or formed discontinuously.
  • the concave strip may have various sectional shapes such as triangle, semi-circle, arc and rectangle according to the shape of the
  • the buffer layer 22 used in the protective layer is not shown in the figures.
  • the hollows may have a plurality of granular hollows therein. These hollows are just for reducing
  • optical fiber unit
  • FIGs. 7a to 7c show optical fiber units adopting a ribbon-type optical fiber in which optical fibers 10 are surrounded by a ribbon 16.
  • the optical fiber unit shown in FIG. 7a is configured so that the buffer layer
  • the ribbon 16 is made of polyethylene (PE), polyurethane, polyvinyl chloride (PVC) or
  • the aforementioned concave strip 30 is formed on the outer surface of the buffer layer 22.
  • the concave strip 30 may have various types of patterns such as
  • the buffer layer 22 directly surrounds the ribbon-type optical fibers 10 and acts as a protective layer.
  • the buffer layer is preferably made of harder materials than a general one for the purpose
  • the buffer layer 22 used in this embodiment preferably has an elastic coefficient in which a
  • secant modulus is more than 20 MPa at 2.5% strain, more preferably more than 100 MPa.
  • the optical fiber unit shown in FIG. 7b is similar to that of FIG. 7a, except that a
  • coloring coating layer 14 is additionally formed around each optical fiber in the ribbon
  • concave strip 30 is formed on the outer surface of the sheath 24, which is an outermost
  • buffer layer 22 may be made of materials generally used in the art. Meanwhile, the
  • sheath 24 positioned around the buffer layer 22 preferably has a modulus in the range of
  • the optical fiber unit shown in FIG. 7c is configured so that an intermediate layer 26 is added to the optical fiber unit of FIG. 7b.
  • the intermediate layer 26 is positioned between the buffer layer 22 and the sheath 24, and not directly influenced by the concave strip 30.
  • the concave strip 30 is formed
  • outer surface of the protective layer of the optical fiber unit may be changed as required
  • Such concave strips having various patterns may have various sectional shapes such as triangle, semi-circle, arc and rectangle according to the shape of the processing device, of course.
  • a tension reinforcing member may be installed together with the optical fibers in the optical fiber unit.
  • reinforcing member may be installed either additionally together with the plurality of
  • optical fibers 10 or by replacing a pair of the optical fibers with the tension reinforcing
  • the tension reinforcing member may be made of a fiber or a wire, and preferably Kevlar or Aramid is used for the tension reinforcing member.
  • FIG. 8 shows an apparatus for manufacturing an optical fiber unit for air blown
  • an optical fiber unit In order to manufacture an optical fiber unit according to the present invention, it is sufficient to add a device for forming a concave strip on the outer surface of the protective layer of the optical fiber unit together with the conventional equipment.
  • a payoff 60 for supplying an optical fiber and a take-up device 100 for winding the optical fiber are used. That is to say, the optical fiber is supplied through the payoff 60 and then made into an optical fiber unit through a series of processes, and then the made optical fiber unit is wound around the take-up device 100.
  • the optical fiber supplied from the payoff 60 is firstly guided to a coating die 70.
  • a guide roller 62 may be installed adjacent to the coating die 70 so that the optical fiber may have a suitable advancing direction to the coating die 70.
  • the coating die 70 coats a protective layer such as a buffer layer or a sheath on the surface of the optical fiber to make the optical fiber unit, and then supplies the coated optical fiber unit to an ultraviolet (UV) curing device 80.
  • UV ultraviolet
  • the protective layer coated on the surface of the optical fiber is being significantly heated, which is not suitable for works such as a surface processing.
  • the UV curing device 80 radiates ultraviolet rays to the optical fiber unit so as to cure the coated protective layer.
  • the optical fiber unit having the cured protective layer as mentioned above is then supplied to a mechanical processing machine (e.g., a cutting unit) 90.
  • the mechanical processing machine 90 forms the aforementioned concave strip on the outer surface of the cured protective layer while the optical fiber unit is
  • the mechanical processing machine 90 preferably employs • the groove cutting, and a cutting tool (not shown) of a predetermined shape is prepared
  • the mechanical processing machine 90 should be rotated in a predetermined way so as to process the concave strip in a spiral or waved pattern, and a motor 92 is connected to the mechanical processing
  • the motor 92 rotates the mechanical processing machine
  • the motor 92 may be connected to a controller 94 and then operated according to commands of the controller 94.
  • the mechanical processing machine 90 is
  • the mechanical processing machine 90 is rotated alternatively clockwise and counterclockwise.
  • the motor 92 should be
  • a rotational direction of the motor 92 may be changed according to a predetermined condition of the controller 94.
  • the groove processing is performed discontinuously with periodically advancing and retreating the cutting tool for cutting a groove to form the concave strip 50 on the outer surface of the protective layer 20 while the mechanical processing machine 90 is rotated either in one direction or in clockwise/counterclockwise directions alternatively.
  • the controller 94 controls advance and retreat of the cutting tool together with rotational direction and speed of the mechanical processing machine 90. If the concave strip processing procedure is finished, the optical fiber unit according to the present invention is completed, and the completed optical fiber unit is supplied to and wound around the take-up device 100.
  • FIG. 9 is a sectional view (a) showing a coating die 70' for forming the concave strip 30 according to another embodiment of the present invention, and a front view (b) showing an exit of the coating die 70'.
  • the protective layer is formed together with the concave strip 30 therein during the coating process in which the protective layer 20 is formed around the optical fiber 10, different from the former embodiment referring to FIG. 8.
  • the modified coating die 70' shown in FIG. 9 is used instead of the general coating die 70 of FIG. 8, and the mechanical processing machine
  • the coating die 70' shown in FIG. 9 coats the protective layer 20 on the optical fiber 10 by passing the optical fiber 10 into a nipple 71 in a direction of the arrow A and supplying a polymer resin in a direction of the arrow B on the outer surface of the optical fiber 10.
  • the exit of the coating die 70' basically has a circular shape, but at least one protrusion 72 in a shape of triangle, rectangle, semi-circle, arc, trapezoid, convex and so on is formed on the inner circumference of the exit, as shown in FIG. 9 (b).
  • the protective layer 20 is coated on the outer surface of the optical fiber 10 and the concave strip is formed on the protective layer 20 according to the shape of the protrusion 72 at the same time.
  • the motor 92 and the controller 94 shown in FIG. 8 may also be connected to the coating die 70' of this embodiment so that the coating die 70' may rotate to form the concave strip in a spiral or waved pattern.
  • the coating die 70' is rotated clockwise and/or counterclockwise in the coating process on a plane perpendicular to the advancing direction of the optical fiber, or if the optical fiber 10 is rotated in a similar way, it is possible to manufacture an optical fiber unit coated with a protective layer on the outer surface of which a concave strip of various patterns such as a spiral or waved pattern is formed.
  • the optical fiber coated by the protective layer having the concave strip as mentioned above is then wound around the take-up device 100 via the UV curing device 80 and the guide roller 64 of FIG. 8.
  • the optical fiber 10 passing through the coating die 70' in this embodiment may be a single-core optical fiber, a multi-core optical fiber as shown in FIG. 6f, or a
  • optical fiber unit for air blown installation according to the present
  • optical fiber unit of the present invention shows great
  • optical fiber unit of the present invention prevents thermal
  • optical fiber unit manufacturing method of the present invention does not require the process of coating or attaching fine particles from outside, it is possible to reduce the material cost and manufacturing cost, and prevent thermal deterioration of the work environments due to the fine particles.
  • the manufacturing method of the present invention is very simple. Moreover, such an optical fiber unit does not cause fine particle breakdown or separation while it is kept in the custody or installed into a tube, so it is safer and more convenient than the conventional one.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Surface Treatment Of Glass Fibres Or Filaments (AREA)

Abstract

Une unité à fibre optique pour installation de soufflage d'air comprend une fibre optique et une couche protectrice entourant la fibre optique. Au moins une bande concave est formée sur la surface extérieure de la couche protectrice dans l'axe longitudinale de celle-ci, ce qui augmente la résistance superficielle vis-à-vis de l'air soufflé et améliore l'efficacité de travail de l'installation de soufflage d'air. La bande concave possède une forme de spirale, ondulée ou de zigzag sur la circonférence extérieure de la couche protectrice et possède une section triangulaire, semi-circulaire, arquée ou rectangulaire. La fibre optique est du type à une seule âme, à deux âmes ou en ruban, et la couche protectrice est dotée d'une couche tampon, ou d'une couche tampon/gaine, ou d'une couche tampon/couche intermédiaire/gaine.
PCT/KR2004/000118 2003-01-24 2004-01-20 Unite a fibre optique pour installation de soufflage d'air, procede et appareil pour sa fabrication WO2004066008A1 (fr)

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KR10-2003-0004902 2003-01-24
KR1020030004902 2003-01-24

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WO2006025644A1 (fr) * 2004-09-01 2006-03-09 Ls Cable Ltd. Tuyau pour installation par air souffle et cable de tuyau associe
NL2009655C2 (en) * 2012-01-19 2014-04-22 Jelcer Ip B V Glass fibre cable in a pressure sewer.
WO2018144529A1 (fr) * 2017-02-01 2018-08-09 Commscope Technologies Llc Câble à fibre(s) optique(s) intérieur/extérieur à faible coefficient de frottement ayant une forme extérieure cannelée
CN110361822A (zh) * 2019-08-10 2019-10-22 江苏俊知技术有限公司 一种新型结构的气吹光缆及其制造方法
CN111965776A (zh) * 2020-09-04 2020-11-20 江苏亨通光电股份有限公司 一种螺旋微槽型气吹微缆、制造设备及制造方法
CN115655426A (zh) * 2022-12-27 2023-01-31 武汉东沃慧达科技有限公司 一种光纤光栅称重传感器及其制造方法与传感系统

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1813211A (zh) * 2003-06-26 2006-08-02 Ls电线有限公司 能够消除静电的安装光纤单元的方法和装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6396517U (fr) * 1986-12-11 1988-06-22
US5042907A (en) * 1988-05-28 1991-08-27 Imperial Chemical Industries Coated optical fibres

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11142701A (ja) 1997-11-11 1999-05-28 Furukawa Electric Co Ltd:The 光ファイバケーブル
JPH11281857A (ja) 1998-03-30 1999-10-15 Fujikura Ltd 光ファイバケーブルおよび光ファイバケーブルの巻き取り方法
US6169834B1 (en) 1998-05-13 2001-01-02 Alcatel Slotted composite cable having a cable housing with a tubular opening for copper pairs and a slot for an optical fiber
JPH11344656A (ja) 1998-06-01 1999-12-14 Furukawa Electric Co Ltd:The 管路敷設用ケーブル
JP2000131578A (ja) 1998-10-27 2000-05-12 Furukawa Electric Co Ltd:The 光ファイバケーブル
CN1165790C (zh) 1999-12-13 2004-09-08 辛克坦克新西兰有限公司 将缆线置入管道中的改进

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6396517U (fr) * 1986-12-11 1988-06-22
US5042907A (en) * 1988-05-28 1991-08-27 Imperial Chemical Industries Coated optical fibres

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006025644A1 (fr) * 2004-09-01 2006-03-09 Ls Cable Ltd. Tuyau pour installation par air souffle et cable de tuyau associe
GB2432226A (en) * 2004-09-01 2007-05-16 Ls Cable Ltd Tube for air blown installation and tube cable using the same
GB2432226B (en) * 2004-09-01 2008-08-27 Ls Cable Ltd Tube for air blown installation and tube cable using the same
NL2009655C2 (en) * 2012-01-19 2014-04-22 Jelcer Ip B V Glass fibre cable in a pressure sewer.
WO2018144529A1 (fr) * 2017-02-01 2018-08-09 Commscope Technologies Llc Câble à fibre(s) optique(s) intérieur/extérieur à faible coefficient de frottement ayant une forme extérieure cannelée
CN110361822A (zh) * 2019-08-10 2019-10-22 江苏俊知技术有限公司 一种新型结构的气吹光缆及其制造方法
CN111965776A (zh) * 2020-09-04 2020-11-20 江苏亨通光电股份有限公司 一种螺旋微槽型气吹微缆、制造设备及制造方法
WO2022048558A1 (fr) * 2020-09-04 2022-03-10 江苏亨通光电股份有限公司 Micro-câble de soufflage d'air avec micro-cannelure hélicoïdale, et appareil de fabrication et son procédé de fabrication
CN115655426A (zh) * 2022-12-27 2023-01-31 武汉东沃慧达科技有限公司 一种光纤光栅称重传感器及其制造方法与传感系统

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