WO2017084517A1 - Procédé de co-extrusion bicouche pour câble optique soufflé par air extrêmement petit, et câble optique soufflé par air extrêmement petit - Google Patents

Procédé de co-extrusion bicouche pour câble optique soufflé par air extrêmement petit, et câble optique soufflé par air extrêmement petit Download PDF

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Publication number
WO2017084517A1
WO2017084517A1 PCT/CN2016/105098 CN2016105098W WO2017084517A1 WO 2017084517 A1 WO2017084517 A1 WO 2017084517A1 CN 2016105098 W CN2016105098 W CN 2016105098W WO 2017084517 A1 WO2017084517 A1 WO 2017084517A1
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WO
WIPO (PCT)
Prior art keywords
layer
cable
micro
loose tube
optical cable
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Application number
PCT/CN2016/105098
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English (en)
Chinese (zh)
Inventor
吴迪
刘沛东
尹纪成
吴俊雄
沈新华
潘红舟
钱建荣
江荣
吴水荣
居志纲
王中凯
孙丽华
Original Assignee
江苏亨通光电股份有限公司
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Application filed by 江苏亨通光电股份有限公司 filed Critical 江苏亨通光电股份有限公司
Publication of WO2017084517A1 publication Critical patent/WO2017084517A1/fr

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    • 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
    • G02B6/4486—Protective covering
    • 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
    • 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
    • G02B6/443—Protective covering
    • 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
    • G02B6/4434—Central member to take up tensile loads
    • 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
    • G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials

Definitions

  • the invention belongs to the technical field of optical cable manufacturing, in particular to air-blowing cables, and in particular to a double-layer co-extrusion process method for a micro-micro air-blowing cable and a micro-micro air-blowing cable prepared by the method.
  • the secondary coating layer of the loose tube is generally extruded from a single layer of PBT, and the secondary coating layer formed by the material and the extrusion process determines the loose tube resistance.
  • the side pressure performance, the anti-pressure performance of the loose tube limits the wall thickness of the loose tube, which limits the diameter of the loose tube, and cannot achieve the theoretical limit of the micro air blowing cable.
  • the present invention provides a two-layer coextrusion method for a very micro air blown cable and a micro micro air blown cable prepared by the method, in which a PC material and a PBT material are used, and then a double layer is used.
  • the extrusion extrusion process enables the loose tube to combine the advantages of both materials well, and the outer diameter of the loose tube of the 12-core ordinary fiber can be made to the theoretical limit, thereby making the micro-air blowing of the process preparation.
  • the optical cable can not only achieve the high mechanical strength and flexibility that can not be achieved by ordinary air-blown cables, but also achieve the characteristics of high optical fiber assembly density, small cable diameter and light weight required for air-blowing cable.
  • a two-layer coextrusion method for a very micro air blown cable comprising:
  • Fiber warehousing screening the fiber into the warehouse, selecting the fiber with acceptable transmission performance and tension;
  • Fiber coloring The standard full-chromatography is used to identify the fiber. The identified fiber does not fade at high temperatures, and is easy to identify when connected.
  • Secondary coating is made into a loose tube by double-layer coextrusion extrusion process
  • SZ stranding twisting a loose tube made of secondary coating with a yarn
  • Outer sheathing process extruding the sheath material through the SZ stranded cable to form an outer sheath;
  • the secondary coating process is: drying and extruding the PC material and the PBT material through different extruder units, and extruding the inner layer of the loose tube through different mixing cones and flow passages in the machine head.
  • the outer layer is extruded as PBT material.
  • the process conditions controlled in the secondary coating process are: controlling the rotational speed of the two extruders to control the wall thickness of the inner and outer layers of the loose tube, and using a small size mold for double-layer coextrusion extrusion The outer diameter of the loose tube is controlled.
  • the temperature of the cooling water tank and the speed of the main traction are also controlled in the secondary coating process, thereby controlling the geometry of the loose tube and the internal fiber length thereof.
  • the process conditions to be controlled in the SZ stranding process are: controlling the take-up line tension and the yarn tension in the SZ stranding process.
  • a micro-micro air blow cable comprises: a central reinforcement disposed at a center, the outer periphery of the central reinforcement being covered with a plurality of loose sleeves, the loose sleeve comprising: a PBT outer layer, a PC The layer and the plurality of optical fibers covered by the inner layer of the PC, the outer portions of the plurality of loose tubes are coated with an outer sheath.
  • the inner layer of the PC and the optical fiber are filled with a water blocking material in the loose tube.
  • the water blocking yarn is further twisted, and the water blocking yarn is twisted together with the loose tube SZ, and a gap between the loose tube and the outer sheath is filled with a cable.
  • a tear cord is further included, the tear cord being disposed inside the outer sheath, the tear cord being disposed axially.
  • the outer sheath has a thickness of 0.5 mm.
  • the method of the invention adopts a double-layer co-extrusion process of PC material and PBT material to prepare a micro-micro air-blowing cable, so that the loose tube of the cable has the advantages of two materials, and the method passes precise process parameters.
  • the control realizes the limit control of the optical cable geometry, the outer diameter of the cable is reduced to the theoretical minimum, and has the advantages of high fiber density, small cable diameter and light weight, and is the best choice for air blowing.
  • the double-layer coextrusion extrusion process and the use of the new material of the invention make the optical cable have high mechanical strength and good flexibility, and the PC material enables the optical cable to have better high temperature resistance and improve the optical cable. Environmental resistance.
  • the ultra-micro air blown cable of the present invention solves the problems of high cost, high construction difficulty, and poor capacity expansion and upgrade capability of the conventional optical cable.
  • Figure 1 is a flow chart of the method of the present invention.
  • FIG. 2 is a schematic cross-sectional structural view of a micro-micro air blown cable of the present invention.
  • 1-center reinforcement 2- loose tube, 21-PBT outer layer, 22-PC inner layer, 23- loose tube inner water-blocking material, 24-fiber, 3-outer sheath, 4-water blocking Yarn, 5-tipped rope, 6-cable.
  • this embodiment discloses a two-layer coextrusion method for a very micro air blown cable, which adopts a novel loose tube material and double layer co-extrusion with respect to a conventional secondary coating production process. Out of the process.
  • Fiber Warehousing Screen the incoming fiber and select the fiber with acceptable transmission performance and tension.
  • Fiber coloring The standard full-chromatography is used to identify the fiber. The identified fiber does not fade at high temperatures and is easily identifiable when connected.
  • the secondary coating is made into a loose tube by double-layer coextrusion extrusion process; the PC material and the PBT material are respectively dried and extruded through different extruder units, and the different material cones are passed through the machine head.
  • the inner layer of the loose tube is made of PC material and the outer layer is PBT material.
  • a special small-sized mold is used for extrusion to achieve precise control of the outer diameter of the small-sized sleeve to facilitate subsequent SZ stranding, sheath production.
  • SZ stranding The loose tube made of secondary coating is twisted together with the yarn.
  • the tension of the retracting wire needs to be strictly controlled when the SZ is twisted.
  • the large tension tends to cause the loosening of the loose tube or the cable core to cause a large attenuation of the fiber.
  • special attention should be paid to the tension control of the skein when the SZ is twisted.
  • the tension of the skein tends to cause the cable core to have a stencil and may cause a problem of excessive fiber attenuation.
  • the SZ stranded cable is externally extruded from the sheathing material to form an outer sheath;
  • the extremely micro-layer stranded air-blowing cable has a stable tension in the production line due to the small size requirement of the structure.
  • the small tension control, the thickness of the outer sheath should also be controlled to the minimum under the premise of ensuring the quality of the cable.
  • the extrusion die of the sheath needs to use a special small-sized mold, and the thickness of the sheath is 0.5mm.
  • the test is performed after each of the above processes is completed.
  • the double-layer co-extrusion extrusion process and the use of new materials in this embodiment enable the optical cable to have high mechanical strength and good flexibility, and the PC material enables the optical cable to have better high temperature resistance and improve the optical cable. Environmental resistance.
  • a micro-micro air blow cable is prepared by the process disclosed in the embodiment 1.
  • the structure of the cable is as shown in FIG. 2, which includes: a center reinforcement 1 disposed at the center, the center reinforcement
  • the outer circumference of the member 1 is covered with a plurality of loose tubes 2
  • the loose tube 1 comprises: a PBT outer layer 21, a PC inner layer 22, and a plurality of optical fibers 24 covered by the PC inner layer 22, and the PC inner layer 22
  • a loose tube inner water blocking member 23 is filled between the optical fiber 24, and the outer portion of the plurality of loose tubes 2 is covered with an outer sheath 3.
  • the gap between the loose tube 2 and the outer sheath 3 is filled with a cable 6 which is twisted together with a plurality of water-blocking strands 4 by SZ stranding, in the outer sheath 3
  • a tear cord 5 is provided on the inner side, and the tear cord 5 is disposed in the axial direction, and the tear cord 5 and the water blocking strand yarn 4 are disposed in the cable paste 6.
  • the materials used in the loose tube inner water blocking member 23, the outer sheath 3, the tearing cord 5, the water blocking tying yarn 4, and the cable paste 6 are all materials commonly used in the art.
  • the method of the invention adopts a double-layer co-extrusion process of PC material and PBT material to prepare a micro-micro air-blowing cable, so that the loose tube of the cable has the advantages of two materials, and the method is controlled by precise process parameters.
  • the limit control of the optical cable geometry is realized, and the outer diameter of the optical cable is reduced to a theoretical minimum. Therefore, the thickness of the outer sheath 3 is designed to be 0.5 mm, and the optical cable has the advantages of high fiber density, small cable diameter, and light weight. It is the best choice for air blowing.
  • the ultra-micro air blown cable in this embodiment solves the problems of high cost, high construction difficulty, and poor capacity expansion and upgrade capability of the conventional optical cable.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

L'invention concerne un procédé de co-extrusion bicouche pour un câble optique soufflé par air extrêmement petit. Le procédé comprend les opérations suivantes : placer des fibres optiques dans un stockage, colorer les fibres optiques, revêtir deux fois, effectuer un câblage SZ, et recouvrir avec une gaine externe. Le procédé de revêtement par deux fois consiste : à sécher et extruder respectivement un matériau en polycarbonate (PC) et un matériau en polytéréphtalate de butylène (PBT) au moyen de différents ensembles de machine de moulage par extrusion, et à extruder une couche interne d'un tube lâche (2) en utilisant le matériau de PC et à extruder une couche externe en utilisant le matériau de PBT au moyen de cônes et de patins de séparation d'un matériau différent dans une tête de machine. Le procédé adopte une technologie de co-extrusion bicouche du matériau de PC et du matériau de PBT pour préparer un câble optique soufflé par air extrêmement petit, ce qui permet à un tube lâche du câble optique d'avoir les avantages de deux matériaux ; en outre, le procédé réalise la commande de limite pour les dimensions géométriques du câble optique par la commande précise de paramètres technologiques de manière à réduire le diamètre externe du câble optique à une valeur minimale théorique ; et le câble optique soufflé par air extrêmement petit a les avantages d'une intensité élevée, d'un petit diamètre de câble, d'être léger en masse, et analogues.
PCT/CN2016/105098 2015-11-17 2016-11-08 Procédé de co-extrusion bicouche pour câble optique soufflé par air extrêmement petit, et câble optique soufflé par air extrêmement petit WO2017084517A1 (fr)

Applications Claiming Priority (2)

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CN201510789934.2A CN105278066A (zh) 2015-11-17 2015-11-17 用于极微型气吹光缆的双层共挤方法及极微型气吹光缆
CN201510789934.2 2015-11-17

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CN105278066A (zh) * 2015-11-17 2016-01-27 江苏亨通光电股份有限公司 用于极微型气吹光缆的双层共挤方法及极微型气吹光缆
CN106125234A (zh) * 2016-08-23 2016-11-16 江苏亨通光电股份有限公司 一种大芯数小缆径防蚁气吹微缆及其制作工艺
CN106772859A (zh) * 2016-12-30 2017-05-31 通鼎互联信息股份有限公司 一种室外光缆生产方法
JP6382387B1 (ja) 2017-04-14 2018-08-29 株式会社フジクラ 光ファイバケーブルの製造方法および光ファイバケーブルの製造装置
CN109061822A (zh) * 2018-09-26 2018-12-21 江苏亨通光电股份有限公司 一种超细防蚁气吹光缆及其制作方法
CN108983378A (zh) * 2018-09-28 2018-12-11 江苏亨通光电股份有限公司 一体化光缆及其制造工艺
CN108957668A (zh) * 2018-09-28 2018-12-07 江苏亨通光电股份有限公司 一种加强型防蚁气吹微缆及其制作工艺
CN109385052A (zh) * 2018-10-22 2019-02-26 江苏亨通光电股份有限公司 线缆微束管及微束管线缆
CN109212696A (zh) * 2018-11-08 2019-01-15 江苏中煤电缆有限公司 煤矿用低烟无卤橡套电缆用耐高温光纤及其制造方法
WO2021128401A1 (fr) * 2019-12-28 2021-07-01 江苏中天科技股份有限公司 Micro-câble soufflé à l'air et procédé de fabrication
CN112363285A (zh) * 2020-11-11 2021-02-12 江苏亨通光电股份有限公司 一种管道用小型化光缆及其施工方法

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CN104730663A (zh) * 2015-04-08 2015-06-24 江苏亨通光电股份有限公司 小缆径超细气吹微型光纤光缆及其制作工艺

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EP1482341A1 (fr) * 2003-05-26 2004-12-01 Alcatel Micro-câble à fibres optiques compact
CN2821602Y (zh) * 2005-03-04 2006-09-27 长飞光纤光缆有限公司 具有固体润滑层的光缆
CN102360107A (zh) * 2011-11-01 2012-02-22 江苏亨通光电股份有限公司 中心管式全介质自承式光缆及其制造方法
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CN104714283A (zh) * 2015-03-20 2015-06-17 西安西古光通信有限公司 一种混合型松套层绞式光缆及其制作方法
CN105278066A (zh) * 2015-11-17 2016-01-27 江苏亨通光电股份有限公司 用于极微型气吹光缆的双层共挤方法及极微型气吹光缆

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