WO2018133479A1 - 一种吸水型光纤松套管及其制造方法 - Google Patents

一种吸水型光纤松套管及其制造方法 Download PDF

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WO2018133479A1
WO2018133479A1 PCT/CN2017/107939 CN2017107939W WO2018133479A1 WO 2018133479 A1 WO2018133479 A1 WO 2018133479A1 CN 2017107939 W CN2017107939 W CN 2017107939W WO 2018133479 A1 WO2018133479 A1 WO 2018133479A1
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water
loose tube
optical fiber
fiber
layer
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French (fr)
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陈黎明
王珑
胡国华
刘骋
祁庆庆
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Fiberhome Telecommunication Technologies Co Ltd
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Fiberhome Telecommunication Technologies Co Ltd
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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
    • G02B6/4401—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
    • 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
    • G02B6/4439—Auxiliary devices
    • G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
    • 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

Definitions

  • the invention relates to the field of optical communication, and in particular to a water absorption type optical fiber loose tube and a manufacturing method thereof.
  • Fiber loose tube is a common component of fiber optic cable.
  • the existing fiber loose tube is divided into two types: oil-filled and water-resistant yarn dry, and grease-filled fiber loose tube is made of fiber and resistor.
  • the water fiber paste and the plastic loose tube are formed;
  • the water blocking yarn dry type fiber loose tube is composed of an optical fiber, a water blocking yarn and a plastic loose tube. Both types of loose tube have defects:
  • the technical problem to be solved by the present invention is that the current light loose tube has a problem of low connection efficiency.
  • the technical solution adopted by the present invention provides a water-absorbent fiber loose tube comprising an optical fiber, a water absorbing layer and a plastic coating layer from the inside to the outside, the water absorbing layer comprising a super absorbent resin and a carrier resin. And the mass ratio of the super absorbent resin to the carrier resin is (1 to 10): 100.
  • the superabsorbent resin is a polyacrylate, a polyvinyl alcohol-anhydride crosslinked copolymer or a vinyl acetate-acrylate copolymer, and has a water absorption ratio of 200 g/g to 2000 g/g and a mesh number of 100 to 300. .
  • the carrier resin is polybutylene terephthalate, polypropylene, a thermoplastic polyester elastomer or an ethylene-vinyl acetate copolymer.
  • the plastic coating layer is polybutylene terephthalate, polypropylene, thermoplastic polyester elastomer or polycarbonate.
  • the water absorbing layer has a thickness of 0.05 mm to 0.2 mm.
  • the plastic coating layer has a thickness of 0.05 mm to 0.2 mm.
  • the invention also provides a method for manufacturing the above-mentioned water-absorbing optical fiber loose tube, comprising the following steps:
  • the prepared super absorbent resin and carrier resin are added to a high-speed mixer and uniformly mixed, and then added to the barrel of the auxiliary extruder;
  • the fiber Open the main extruder and auxiliary extruder, while releasing the fiber, the fiber is formed into a bundle through the needle tube mold, enters the cross head, the cross head is extruded into a double sleeve, and the fiber is placed in the center of the double sleeve, the inner layer a water absorbing layer formed of a super absorbent resin and a carrier resin, the outer layer being a plastic coating layer;
  • the double-layer casing passes through the hot water tank, the wheeled tractor, the cold water tank, the blow drying device, the caliper device, the take-up tension wheel, and finally the wire is taken up on the wire take-up device to obtain the fiber loose tube.
  • compressed air is introduced into the syringe mold to ensure that the size of the double sleeve is rounded.
  • the fiber tension of the fiber is controlled at 100g to 120g; the wire tension is 1000g; the pressure in the needle mold is 0.2 to 0.25MPa, the gas flow rate is 55L/h to 75L/h; and the hot water temperature is 40°C. 50 ° C; cold water temperature is 10 ° C ⁇ 20 ° C.
  • the water absorbing layer has a good water absorbing effect and can prevent water from continuing to ooze inward along the casing, protecting the optical fiber from moisture and prolonging the service life of the optical fiber;
  • the inside does not contain grease.
  • the cable made of the loose tube has the weight of the cable. The cable is not cleaned during the construction of the cable, which facilitates the continuous connection, improves the construction efficiency, and avoids the ointment polluting the environment;
  • the water-absorbent fiber loose tube contains only the optical fiber and does not contain the grease. Therefore, it can be disposed more than the grease-filled fiber loose tube and the water-resistant yarn dry fiber loose tube under the same casing outer diameter.
  • the number of optical fibers therefore, on the basis of the same number of optical fibers, the invention has smaller outer diameter and lighter weight than the above two kinds of loose tubes, which is convenient for construction and saves wiring space, thereby saving economic cost.
  • Figure 1 is a schematic view of the structure of the present invention
  • FIG. 2 is a schematic view showing the manufacturing process of the present invention.
  • the present invention provides a water-absorbing fiber loose tube comprising an optical fiber 112, a water absorbing layer 113 and a plastic coating layer 114 from the inside to the outside, and the water absorbing layer 113 is made of a high water absorbing resin and a carrier resin according to a certain quality.
  • the composition of the ratio is between 1:100 and 1:10.
  • the superabsorbent resin is a polyacrylate, a polyvinyl alcohol-anhydride crosslinked copolymer or a vinyl acetate-acrylate copolymer, and has a water absorption ratio of 200 g/g to 2000 g/g and a mesh number of 100 to 300.
  • the carrier resin is polybutylene terephthalate, polypropylene, thermoplastic polyester elastomer or ethylene-vinyl acetate copolymer.
  • the plastic coating layer 114 is polybutylene terephthalate, polypropylene, thermoplastic polyester elastomer or polycarbonate.
  • the water absorbing layer 113 has a thickness of 0.05 mm to 0.2 mm.
  • the plastic coating layer 114 has a thickness of 0.05 mm to 0.2 mm.
  • the present invention also provides a method for manufacturing the above-mentioned water-absorbing optical fiber loose tube, comprising the following steps:
  • the prepared super absorbent resin and carrier resin are added to the high-speed mixer to be uniformly mixed, and then added to the barrel of the auxiliary extruder 102;
  • the carrier resin is added to the barrel of the main extruder 103;
  • the main extruder 103 and the auxiliary extruder 102 are turned on, and the fiber is discharged at the same time.
  • the fiber is formed into a bundle through the needle mold, enters the cross head 104, and the cross head 104 extrudes the double sleeve, and the optical fiber is placed in the double sleeve.
  • Center, the inner layer is a water absorbing layer formed of a super absorbent resin and a carrier resin, and the outer layer is a plastic coating layer;
  • the double-layer casing passes through the hot water tank 105, the wheeled tractor 106, the cold water tank 107, the blow drying device 108, the caliper device 109, the take-up tension wheel 110, and finally takes up the wire on the wire take-up device 111 to obtain a fiber loose sleeve. tube.
  • compressed air is introduced into the syringe mold to ensure that the size of the double sleeve is rounded.
  • the fiber tension of the optical fiber is controlled at 100g-120g; the take-up tension is 1000g; the air pressure in the needle mold is 0.2-0.25MPa, the gas flow rate is 55L/h-75L/h; and the hot water temperature is 40°C-50°C.
  • the water temperature of the cold water tank is 10 ° C ⁇ 20 ° C.
  • the excess length of the fiber in the loose tube is adjusted by the fiber tension, the tension of the wire, the temperature of the hot water tank and the water temperature of the cold water tank, and the remaining length is 0.02 to 0.04%.
  • the super absorbent resin is a polyacrylate having a water absorption ratio of 500 g/g and a mesh number of 200;
  • the carrier resin is polybutylene terephthalate;
  • the two were mixed at a mass ratio of 5:100, stirred in a high-speed mixer at 90 ° C for 15 minutes, and then the mixture of the two was added to the barrel of the auxiliary extruder 102 to leave the remaining poly-paraphenyl.
  • Butylene glycol formate is added to the barrel of the master molding machine 103;
  • the fiber adopts 12 cores, the fiber tension of the fiber is controlled at 100g ⁇ 120g; the tension of the wire is 1000g; the pressure in the needle is 0.2 ⁇ 0.25MPa, and the gas flow is 55L/h ⁇ 75L/h;
  • the water temperature of the tank 105 is 40 ° C to 50 ° C; and the water temperature of the cold water tank 107 is 10 ° C to 20 ° C.
  • the 12-core water-absorbent type optical fiber loose tube obtained by the manufacturing method of the present invention has an outer diameter of 2.0 mm, an inner diameter of 1.25 mm, and an excess fiber length of 0.02 to 0.04%.
  • the water absorbing layer has a good water absorbing effect and can prevent water from continuing to inwardly flow along the casing, protecting the optical fiber from moisture and prolonging the service life of the optical fiber;
  • the inside does not contain grease.
  • the cable made of the loose tube has the weight of the cable. The cable is not cleaned during the construction of the cable, which facilitates the continuous connection, improves the construction efficiency, and avoids the ointment polluting the environment;
  • the water-absorbing fiber loose tube contains only the optical fiber. Because it does not contain the grease, it can be placed in the same casing outer diameter than the grease-filled fiber loose tube and the water-resistant yarn dry fiber loose tube. A large number of optical fibers, therefore, based on the same number of optical fibers, the present invention has smaller outer diameter and lighter weight than the above two kinds of loose tubes, which is convenient for construction and saves wiring space, thereby saving economic cost.

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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)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

一种吸水型光纤松套管，从内到外包括光纤（112）、吸水层（113）和塑料被覆层（114）。吸水层（113）包括高吸水树脂与载体树脂，且高吸水树脂与载体树脂的质量比例为（１～１０）：１００。还提供了一种吸水型光纤松套管的制造方法。该光纤松套管的吸水层（113）具有良好的吸水效果，保护光纤免受水份的侵蚀，延长光纤的使用寿命，该光纤松套管不含油膏，使光缆重量降低，方便续接，提高了施工效率。

Description

一种吸水型光纤松套管及其制造方法 技术领域
本发明涉及光通信领域，具体涉及一种吸水型光纤松套管及其制造方法。
背景技术
光纤松套管是光缆的一种常用组件，现有的光纤松套管分为两种结构型式：油膏填充式和阻水纱干式，油膏填充式光纤松套管是由光纤、阻水纤膏及塑料松套管构成；阻水纱干式光纤松套管是由光纤、阻水纱及塑料松套管构成。这两种光线松套管都存在缺陷：
(1)采用油膏填充式的光纤松套管的光缆接续过程中，需要用工具先把纤膏清理干净，降低了接续效率，并增加了施工时间和成本；
(2)采用阻水纱干式的光纤松套管的光缆，光纤松套管内一般有一、两根阻水纱，占用了光纤的布放空间，而且光缆在受较大外力时，阻水纱会对光纤挤压造成光信号衰减增大。
由此可见，目前的光线松套管存在接续效率低的问题。
发明内容
本发明所要解决的技术问题是目前的光线松套管存在接续效率低的问题。
为了解决上述技术问题，本发明所采用的技术方案是提供了一种吸水型光纤松套管，从内到外包括光纤、吸水层和塑料被覆层，所述吸水层包括高吸水树脂与载体树脂，且高吸水树脂与载体树脂的质量比例为(1～10)：100。
在上述方案中，所述高吸水树脂为聚丙烯酸盐、聚乙烯醇-酸酐交联共聚物或醋酸乙烯-丙烯酸酯共聚物，吸水倍率为200g/g～2000g/g，目数为100～300。
在上述方案中，所述载体树脂为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或乙烯-醋酸乙烯共聚物。
在上述方案中，所述塑料被覆层为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或聚碳酸酯。
在上述方案中，所述吸水层的厚度为0.05mm～0.2mm。
在上述方案中，所述塑料被覆层的厚度为0.05mm～0.2mm。
本发明还提供了一种上述吸水型光纤松套管的制造方法，包括以下步骤：
将准备好的高吸水树脂和载体树脂加到高速混炼机内混合均匀，然后加入到辅挤塑机的料筒中；
将载体树脂加入到主挤塑机的料筒中；
将光纤安装在光纤放线架上；
开启主挤塑机和辅挤塑机，同时放纤，光纤经过针管模具形成一束，进入十字机头，十字机头挤出双层套管，光纤置于双层套管的中心，内层为高吸水树脂与载体树脂形成的吸水层，外层为塑料被覆层；
双层套管经过热水槽、轮式牵引机、冷水槽、吹干装置、测径装置、收线张力轮，最后在收线装置上进行收线，得到光纤松套管。
在上述方案中，针管模具内通入压缩空气，以保证双层套管的尺寸圆整。
在上述方案中，光纤的放纤张力控制在100g～120g；收线张力为1000g；针管模具中气压为0.2～0.25MPa，气体流量为55L/h～75L/h；热水槽水温为40℃～50℃；冷水槽水温为10℃～20℃。
本发明相比现有技术具有以下优点：
(1)吸水层具有良好的吸水效果，并能阻止水沿套管继续向内渗流，保护光纤免受水份的侵蚀，延长光纤的使用寿命；
(2)内部不含油膏，用该松套管制成的光缆，缆重量降低，光缆施工时不用清理油膏，方便续接，提高了施工效率，且避免了油膏污染环境；
(3)吸水型光纤松套管内只包含光纤，不含油膏，因此在相同的套管外径下比油膏填充式光纤松套管和阻水纱干式光纤松套管内可布放更多数量的光纤，因此，含有相同数量的光纤的基础上，本发明比上述两种松套管的外径更小，重量更轻，便于施工且节省线路空间，节约了经济成本。
附图说明
图1为本发明的结构示意图；
图2为本发明的制作流程示意图。
具体实施方式
下面结合具体实施例和说明书附图对本发明予以详细说明。
如图1所示，本发明提供的一种吸水型光纤松套管，从内到外包括光纤112、吸水层113和塑料被覆层114，吸水层113由高吸水树脂与载体树脂按照一定的质量配比组成，质量配比在1：100～1：10之间。
优选地，高吸水树脂为聚丙烯酸盐、聚乙烯醇-酸酐交联共聚物或醋酸乙烯-丙烯酸酯共聚物，吸水倍率为200g/g～2000g/g，目数为100～300。
优选地，载体树脂为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或乙烯-醋酸乙烯共聚物。
优选地，塑料被覆层114为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或聚碳酸酯。
优选地，吸水层113的厚度为0.05mm～0.2mm。
优选地，塑料被覆层114的厚度为0.05mm～0.2mm。
结合图2所示，本发明还提供了一种上述吸水型光纤松套管的制造方法，包括以下步骤：
将准备好的高吸水树脂和载体树脂加到高速混炼机内混合均匀，然后加入到辅挤塑机102的料筒中；
将载体树脂加入到主挤塑机103的料筒中；
将光纤安装在光纤放线架101上；
开启主挤塑机103和辅挤塑机102，同时放纤，光纤经过针管模具形成一束，进入十字机头104，十字机头104挤出双层套管，光纤置于双层套管的中心，内层为高吸水树脂与载体树脂形成的吸水层，外层为塑料被覆层；
双层套管经过热水槽105、轮式牵引机106、冷水槽107、吹干装置108、测径装置109、收线张力轮110，最后在收线装置111上进行收线，得到光纤松套管。
优选地，针管模具内通入压缩空气，以保证双层套管的尺寸圆整。
优选地，光纤的放纤张力控制在100g～120g；收线张力为1000g；针管模具中气压为0.2～0.25MPa，气体流量为55L/h～75L/h；热水槽水温为40℃～50℃；冷水槽水温为10℃～20℃。
光纤在松套管中的余长通过放纤张力、收线张力、热水槽水温和冷水槽水温来调节，余长在0.02～0.04％。
实施例一
高吸水树脂采用聚丙烯酸盐，吸水倍率为500g/g，目数为200；载体树脂采用聚对苯二甲酸丁二醇脂；
两者按照质量比5：100混合，在高速混炼机中在90℃的环境中搅拌15分钟，然后将两者的混合物加入辅挤塑机102的料筒内，将剩余的聚对苯二甲酸丁二醇脂加入主机塑机103的料筒内；
光纤采用12芯，光纤的放纤张力控制在100g～120g；收线张力为1000g；针管中气压为0.2～0.25MPa，气体流量为55L/h～75L/h；热水 槽105的水温为40℃～50℃；冷水槽107的水温为10℃～20℃。
根据本发明的制造方法制得的12芯吸水型光纤松套管的外径为2.0mm，内径为1.25mm，光纤余长在0.02～0.04％。
本发明，相比现有技术具有以下优点：
(1)吸水层具有良好的吸水效果，并能阻止水沿套管继续向内渗流，保护光纤免受水分的侵蚀，延长光纤的使用寿命；
(2)内部不含油膏，用该松套管制成的光缆，缆重量降低，光缆施工时不用清理油膏，方便续接，提高了施工效率，且避免了油膏污染环境；
(3)吸水型光纤松套管内只包含光纤，由于不含油膏，因此在相同的套管外径下比油膏填充式光纤松套管和阻水纱干式光纤松套管内可布放更多数量的光纤，因此，含有相同数量的光纤的基础上，本发明比上述两种松套管的外径更小，重量更轻，便于施工且节省线路空间，节约了经济成本。
本发明不局限于上述最佳实施方式，任何人应该得知在本发明的启示下作出的结构变化，凡是与本发明具有相同或相近的技术方案，均落入本发明的保护范围之内。

Claims (9)

  1. 一种吸水型光纤松套管，其特征在于，从内到外包括光纤、吸水层和塑料被覆层，所述吸水层包括高吸水树脂与载体树脂，且高吸水树脂与载体树脂的质量比例为(1～10)：100。
  2. 如权利要求1所述的一种吸水型光纤松套管，其特征在于，所述高吸水树脂为聚丙烯酸盐、聚乙烯醇-酸酐交联共聚物或醋酸乙烯-丙烯酸酯共聚物中的一种或多种混合而成，吸水倍率为200g/g～2000g/g，目数为100～300。
  3. 如权利要求1所述的一种吸水型光纤松套管，其特征在于，所述载体树脂为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或乙烯-醋酸乙烯共聚物中的一种或多种混合而成。
  4. 如权利要求1所述的一种吸水型光纤松套管，其特征在于，所述塑料被覆层为聚对苯二甲酸丁二醇脂、聚丙烯、热塑性聚酯弹性体或聚碳酸酯中的一种或多种混合而成。
  5. 如权利要求1所述的一种吸水型光纤松套管，其特征在于，所述吸水层的厚度为0.05mm～0.2mm。
  6. 如权利要求1所述的一种吸水型光纤松套管，其特征在于，所述塑料被覆层的厚度为0.05mm～0.2mm。
  7. 如权利要求1所述的一种吸水型光纤松套管的制造方法，其特征在于，包括以下步骤：
    将准备好的高吸水树脂和载体树脂加到高速混炼机内混合均匀，然后加入到辅挤塑机的料筒中；
    将载体树脂加入到主挤塑机的料筒中；
    将光纤安装在光纤放线架上；
    开启主挤塑机和辅挤塑机，同时放纤，光纤经过针管模具形成一束，进入十字机头，十字机头挤出双层套管，光纤置于双层套管的中心，内层 为高吸水树脂与载体树脂形成的吸水层，外层为塑料被覆层；
    双层套管经过热水槽、轮式牵引机、冷水槽、吹干装置、测径装置、收线张力轮，最后在收线装置上进行收线，得到光纤松套管。
  8. 如权利要求7所述的一种吸水型光纤松套管的制造方法，其特征在于，针管模具内通入压缩空气，以保证双层套管的尺寸圆整。
  9. 如权利要求7所述的一种吸水型光纤松套管的制造方法，其特征在于，光纤的放纤张力控制在100g～120g；收线张力为1000g；针管模具中气压为0.2～0.25MPa，气体流量为55L/h～75L/h；热水槽水温为40℃～50℃；冷水槽水温为10℃～20℃。
PCT/CN2017/107939 2017-01-17 2017-10-27 一种吸水型光纤松套管及其制造方法 Ceased WO2018133479A1 (zh)

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