WO2022127141A1 - 一种光纤带 - Google Patents

一种光纤带 Download PDF

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Publication number
WO2022127141A1
WO2022127141A1 PCT/CN2021/111654 CN2021111654W WO2022127141A1 WO 2022127141 A1 WO2022127141 A1 WO 2022127141A1 CN 2021111654 W CN2021111654 W CN 2021111654W WO 2022127141 A1 WO2022127141 A1 WO 2022127141A1
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WIPO (PCT)
Prior art keywords
optical fiber
mold
fiber
diameter
holes
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PCT/CN2021/111654
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English (en)
French (fr)
Inventor
王小泉
张成龙
杨飏
刘骋
李健
Original Assignee
南京华信藤仓光通信有限公司
烽火通信科技股份有限公司
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Publication of WO2022127141A1 publication Critical patent/WO2022127141A1/zh

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Classifications

    • 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
    • G02B6/4403—Optical cables with ribbon structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/30—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length incorporating preformed parts or layers, e.g. moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/38—Moulds, cores or other substrates
    • 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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering

Definitions

  • the present invention relates to an optical cable, in particular to an optical fiber ribbon.
  • Fiber optic cables are often used in tight spaces, such as holes.
  • Existing optical cables are mainly cylindrical optical cables and flat optical fiber ribbons. Cylindrical optical cables are not suitable for flat slits. For flat optical fiber ribbons, they are not suitable for small holes. cause larger fiber delay loss.
  • Existing optical cables are mainly cylindrical optical cables and flat optical fiber ribbons. Cylindrical optical cables are not suitable for flat slits. For flat optical fiber ribbons, they are not suitable for small holes. cause larger fiber delay loss.
  • the purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide an optical fiber ribbon, which includes a plurality of optical fibers and a cladding layer. It also includes a connecting part; the plurality of optical fibers are distributed with spacing along the linear direction, each optical fiber is covered by a coating layer with a uniform thickness, and the coating layers of adjacent optical fibers are connected by the connecting part, so that the optical fiber ribbons are two in the length direction.
  • the side has a corrugated structure, the thickness of the connecting part is 1/3 to 1/2 of the diameter of the cladding layer, and the connecting part and the cladding layer are both made of resin with a Young's modulus of 1Mpa-100Mpa, and the optical fiber ribbon passes through the connecting part.
  • the elastic deformation can be bent in the width direction.
  • the diameter of the optical fiber is 180-250um.
  • the width of the connecting portion is 60-140um, and the thickness of the connecting portion is 30-50um.
  • optical fiber passes through the cavity of the mold at a speed of 100-500 m/min.
  • the resin injection pressure is 1.7-2.1 bar, and the resin injection temperature is 45 ⁇ 5°C.
  • the resin is coated on the optical fiber, it is cured to a degree of curing of more than 90%.
  • It also includes a mold for surviving the optical fiber ribbon, including an inlet mold, a sizing mold and an outlet mold that are attached to each other in sequence.
  • a mold for surviving the optical fiber ribbon including an inlet mold, a sizing mold and an outlet mold that are attached to each other in sequence.
  • sizing fiber hole and exit fiber hole the distance between the entrance fiber hole, sizing fiber hole and exit fiber hole is equal, and the diameter of the sizing fiber hole is smaller than the diameter of the entrance fiber hole and the exit fiber hole;
  • several interconnected entrance fiber holes The sizing fiber hole and the outlet fiber hole are concentrically arranged to form the mold cavity; when a number of optical fibers pass through the corresponding inlet fiber hole, sizing fiber hole and exit fiber hole, the resin in the mold cavity is coated to form an optical fiber ribbon .
  • the diameter of the inlet optical fiber hole is 1.03-1.06 times that of the fixed-diameter optical fiber hole
  • the diameter of the exit optical fiber hole is 1.12-1.15 times that of the fixed-diameter optical fiber hole.
  • the distance between the entrance fiber holes, the sizing fiber holes and the exit fiber holes is 250-320um
  • the diameter of the entrance fiber holes is 220-240um
  • the diameter of the sizing fiber holes is 210-230um
  • the diameter of the exit fiber holes is 240-240um. 260um. .
  • the optical fiber ribbon of the invention passes through a connecting part made of resin with a Young's modulus of 1Mpa-100Mpa, and the connecting part is relatively soft, so that the optical fiber ribbon can be bent in the width direction without attenuation loss, and the optical fiber ribbon is suitable for narrow Slots can also be used for smaller holes.
  • a sizing mold with a smaller aperture is provided to prevent the glue from being broken at the connecting portion between the two optical fibers during the production process of the optical fiber ribbon.
  • FIG. 1 is a schematic diagram of an optical fiber ribbon according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of a 180° bending of an optical fiber ribbon according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of an optical fiber ribbon being bent into a ring shape according to Embodiment 1 of the present invention
  • Fig. 4 is the schematic diagram of the second inlet die according to the embodiment of the present invention.
  • Fig. 5 is the schematic diagram of the second embodiment of the present invention sizing die
  • Fig. 6 is the schematic diagram of the second embodiment of the present invention exit die
  • the optical fiber ribbon includes several optical fibers 1 and a cladding layer 2 covering the optical fibers.
  • the optical fibers 1 pass through the cavity of a resin-injected mold to form the cladding layer 2 outside the optical fibers 1 .
  • the optical fiber ribbon of this embodiment further includes a connecting portion 3.
  • twelve optical fibers are used as an example.
  • the twelve optical fibers 1 are distributed with a spacing along the linear direction, and each optical fiber 1 is covered by a coating layer 2 with a uniform thickness.
  • the cladding layers 2 of the adjacent optical fibers 1 are connected by the connecting part 3, so that the two sides of the optical fiber ribbon along the length direction have a corrugated structure, and the thickness of the connecting part 3 is 1/3 ⁇ 1/2 of the diameter of the cladding layer 2, and
  • the connection part 3 and the cladding layer 2 are both made of resin with a Young's modulus of 1Mpa-100Mpa.
  • the resin with this modulus is relatively soft, so that the optical fiber ribbon can be bent in the width direction through the elastic deformation of the connection part 3 without being damaged. Attenuation loss occurs, as shown in Figure 2 and Figure 3, the optical fiber ribbon of the present invention can be bent into a ring shape or 180°, etc., so that the optical fiber ribbon can be applied to narrow gaps and smaller holes at the same time. During the use of the optical fiber ribbon, it is compatible with the two kinds of narrow spaces.
  • the diameter of the optical fiber is preferably 180-250um, which can be effectively spliced with the optical fibers on the market.
  • the width of the connecting portion 3 is 60-140um, and the thickness of the connecting portion 3 is 30-50um.
  • the attenuation of the optical fiber in this embodiment during bending, for example, in the case of bending 180°, the additional attenuation is less than 0.005dB/km.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • this embodiment is a mold for producing optical fiber ribbons.
  • the mold includes an inlet mold 4, a sizing mold 5, and an outlet mold 6 that are attached to each other.
  • the inlet mold 4, the sizing mold 5, and the outlet mold 6 are respectively provided with the same number of connected inlet fiber holes 41 and sizing fibers.
  • the hole 51 and the exit fiber hole 61 are taken as an example in this embodiment with twelve entrance fiber holes 41 , sizing fiber holes 51 and exit fiber holes 61 .
  • the entrance fiber hole 41, the sizing fiber hole 51 and the exit fiber hole 61 have the same spacing, and the diameter of the sizing fiber hole 51 is smaller than the diameter of the entrance fiber hole 41 and the exit fiber hole 61, which can effectively prevent the adjacent two fibers 1 from When the rubber is covered, the glue is broken in 3 places of the connecting part.
  • the diameter of the entrance fiber hole 41 is 1.03-1.06 times that of the fixed diameter fiber hole 51
  • the diameter of the exit fiber hole 61 is 1.12 to 1.15 times that of the fixed diameter fiber hole 51 .
  • the preferred design is that the distance between the entrance fiber hole 41, the sizing fiber hole 51 and the exit fiber hole 61 is 250-320um, the diameter of the entrance fiber hole 41 is 220-240um, the diameter of the sizing fiber hole 51 is 210-230um, and the exit fiber
  • the hole 61 has a diameter of 240-260um.
  • Each inlet fiber hole 41, sizing fiber hole 51 and outlet fiber hole 61 are arranged in a one-to-one overlapping arrangement, and the corresponding inlet fiber hole 41, sizing fiber hole 51 and outlet fiber hole 61 are concentrically arranged to form a mold cavity.
  • the speed of -500m/min passes through the cavity of the mold, that is, through the corresponding inlet optical fiber holes 41, sizing optical fiber holes 51 and exit optical fiber holes 61 in sequence, and is coated with resin to form an optical fiber ribbon.
  • the resin injection pressure is controlled at 1.7-2.1 bar, and the resin injection temperature is controlled at 45°C. After the resin coating is completed, the optical fiber 1 is post-cured to a degree of curing above 90%.

Abstract

一种光纤带，包括若干光纤（1）和包覆层（2），若干光纤（1）通过注入有树脂的模具的模腔在光纤（1）外形成包覆层（2），该光纤带还包括连接部（3）；该若干光纤（1）沿直线方向有间距的分布，每一光纤（1）由厚度均匀的包覆层（2）包覆，相邻光纤（1）的包覆层（2）由连接部（3）连接，使光纤带沿长度方向的两侧呈瓦楞形结构，连接部（3）厚度为包覆层（2）直径的1/3～1/2，且连接部（3）和包覆层（2）均由杨氏模量为1Mpa-100Mpa的树脂制成，光纤带通过连接部（3）的弹性形变在宽度方向上可弯折。连接部（3）较软，使光纤带可以在宽度方向上可弯折且不发生衰减损耗，使光纤带适用于狭窄缝隙的同时也能适用于较小的孔洞。

Description

一种光纤带 技术领域
本发明涉及一种光缆，特别是一种光纤带。
 背景技术
光缆经常用于狭窄的空间，比如孔洞等。现有的光缆主要为圆柱形的光缆和扁平的光纤带，对于圆柱形的光缆不适用于扁平的缝隙，对于扁平的光纤带，不适用于较小的孔洞，若强行使光纤带弯曲，会造成较大的光纤延迟损耗。
 技术问题
现有的光缆主要为圆柱形的光缆和扁平的光纤带，对于圆柱形的光缆不适用于扁平的缝隙，对于扁平的光纤带，不适用于较小的孔洞，若强行使光纤带弯曲，会造成较大的光纤延迟损耗。
 技术解决方案
本发明的目的在于克服上述现有技术之不足，提供一种光纤带，包括若干光纤和包覆层，若干光纤通过注入有树脂的模具的模腔在光纤外形成包覆层，所述光纤带还包括连接部；所述若干光纤沿直线方向有间距的分布，每一光纤由厚度均匀的包覆层包覆，相邻光纤的包覆层由连接部连接，使光纤带沿长度方向的两侧呈瓦楞形结构，连接部厚度为包覆层直径的1/3～1/2，且连接部和包覆层均由杨氏模量为1Mpa-100Mpa的树脂制成，光纤带通过连接部的弹性形变在宽度方向上可弯折。
进一步的，所述光纤直径为180-250um。
进一步的，所述连接部宽度为60-140um，连接部厚度为30-50um。
进一步的，所述光纤以100-500m/min速度通过模具的模腔。
进一步的，所述树脂注入压力为1.7-2.1bar，树脂注入温度为45±5℃。
进一步的，所述树脂包覆在光纤上后固化至固化度90%以上。
还包括一种生存该光纤带的模具，包括依次相互贴合的入口模、定径模和出口模，入口模、定径模和出口模上分别设有若干数量相同且相互连通的入口光纤孔、定径光纤孔和出口光纤孔，入口光纤孔、定径光纤孔和出口光纤孔孔间距相等，且定径光纤孔孔径小于入口光纤孔和出口光纤孔的孔径；若干相互连通的入口光纤孔、定径光纤孔和出口光纤孔同心设置并形成所述模腔；若干光纤通过对应的入口光纤孔、定径光纤孔和出口光纤孔时由所述模腔内的树脂进行包覆形成光纤带。
进一步的，所述入口光纤孔孔径为定径光纤孔的1.03-1.06倍，所述出口光纤孔孔径为定径光纤孔的1.12-1.15倍。
进一步的，所述入口光纤孔、定径光纤孔和出口光纤孔孔间距为250-320um，入口光纤孔孔径为220-240um，定径光纤孔孔径为210-230um，出口光纤孔孔径为240-260um。。
 有益效果
本发明光纤带通过由杨氏模量为1Mpa-100Mpa的树脂制成的连接部，连接部较为软，使光纤带可以在宽度方向上可弯折且不发生衰减损耗，使光纤带适用于狭窄缝隙的同时也能适用于较小的孔洞。
本发明的模具，通过设置的较小孔径的定径模，在光纤带生产的过程中，防止两根光纤之间的连接部断胶。
 附图说明
图1为本发明实施例一光纤带示意图；
图2为本发明实施例一光纤带弯折180°示意图；
图3为本发明实施例一光纤带弯折成环形的示意图；
图4为本发明实施例二入口模示意图；
图5为本发明实施例二定径模示意图；
图6为本发明实施例二出口模示意图；
图中：1、光纤；2、包覆层；3、连接部；4、入口模；41、入口光纤孔；5、定径模；51、定径光纤孔；6、出口模；61、出口光纤孔。
 本发明的最佳实施方式
实施例一：
如图1所示，光纤带包括若干光纤1和包覆在光纤外的包覆层2，光纤1通过注入有树脂的模具的模腔在光纤1外形成包覆层2。
本实施例的光纤带还包括连接部3，本实施例以十二根光纤为例，十二根光纤1沿直线方向有间距的分布，每一光纤1由厚度均匀的包覆层2包覆，相邻光纤1的包覆层2由连接部3连接，使光纤带沿长度方向的两侧呈瓦楞形结构，连接部3厚度为包覆层2直径的1/3～1/2，且连接部3和包覆层2均由杨氏模量为1Mpa-100Mpa的树脂制成，该模量的树脂较软，使光纤带通过连接部3的弹性形变在宽度方向上可弯折且不发生衰减损耗，如图2、图3所示，本发明的光纤带可以弯折成环形或是折弯180°等，使光纤带适用于狭窄缝隙的同时也能适用于较小的孔洞，在光纤带的使用过程中，兼容该两种狭窄的空间。
光纤直径优选为180-250um，可以很好的与市面上的光纤有效熔接。相对应的连接部3宽度为60-140um，连接部3厚度为30-50um。本实施例的光纤在弯折时的衰减，如在弯折180°的情况下，附加衰减小于0.005dB/km。
实施例二：
如图4-6所示，本实施例为一种模具，用于生产光纤带。模具包括相互贴合的入口模4、定径模5和出口模6，入口模4、定径模5和出口模6上分别设有数量相同的若干相连通的入口光纤孔41、定径光纤孔51和出口光纤孔61，本实施例以十二个入口光纤孔41、定径光纤孔51和出口光纤孔61为例。
入口光纤孔41、定径光纤孔51和出口光纤孔61孔间距相等，且定径光纤孔51孔径小于入口光纤孔41和出口光纤孔61的孔径，可以有效防止相邻的两根光纤1在包覆橡胶时连接部3处断胶。入口光纤孔41孔径为定径光纤孔51的1.03-1.06倍，出口光纤孔61孔径为定径光纤孔51的1.12-1.15倍。优选的设计为，入口光纤孔41、定径光纤孔51和出口光纤孔61孔间距为250-320um，入口光纤孔41孔径为220-240um，定径光纤孔51孔径为210-230um，出口光纤孔61孔径为240-260um。
各入口光纤孔41、定径光纤孔51和出口光纤孔61一一对应的重叠排列，对应的入口光纤孔41、定径光纤孔51和出口光纤孔61同心设置形成模腔，光纤1以100-500m/min速度通过模具的模腔，即依次通过对应的入口光纤孔41、定径光纤孔51和出口光纤孔61，通过树脂进行包覆，形成光纤带。树脂注入压力控制在1.7-2.1bar，树脂注入温度控制在45℃。树脂包覆完成后在光纤1上后固化至固化度90%以上。

Claims (9)

  1. 一种光纤带，包括若干光纤和包覆层，若干光纤通过注入有树脂的模具的模腔在光纤外形成包覆层，其特征在于：所述光纤带还包括连接部；所述若干光纤沿直线方向有间距的分布，每一光纤由厚度均匀的包覆层包覆，相邻光纤的包覆层由连接部连接，使光纤带沿长度方向的两侧呈瓦楞形结构，连接部厚度为包覆层直径的1/3～1/2，且连接部和包覆层均由杨氏模量为1Mpa-100Mpa的树脂制成，光纤带通过连接部的弹性形变在宽度方向上可弯折。
  2. 根据权利要求1所述的光纤带，其特征在于：所述光纤直径为180-250um。
  3. 根据权利要求2所述的光纤带，其特征在于：所述连接部宽度为60-140um，连接部厚度为30-50um。
  4. 根据权利要求1所述的光纤带，其特征在于：所述光纤以100-500m/min速度通过模具的模腔。
  5. 根据权利要求4所述的光纤带，其特征在于：所述树脂注入压力为1.7-2.1bar，树脂注入温度为45±5℃。
  6. 根据权利要求5所述的光纤带，其特征在于：所述树脂包覆在光纤上后的固化度为90%以上。
  7. 一种用于生产权利要求1-6任一所述光纤带的模具，其特征在于：包括依次相互贴合的入口模、定径模和出口模，入口模、定径模和出口模上分别设有若干数量相同且相互连通的入口光纤孔、定径光纤孔和出口光纤孔，入口光纤孔、定径光纤孔和出口光纤孔孔间距相等，且定径光纤孔孔径小于入口光纤孔和出口光纤孔的孔径；若干相互连通的入口光纤孔、定径光纤孔和出口光纤孔同心设置并形成所述模腔；若干光纤通过对应的入口光纤孔、定径光纤孔和出口光纤孔时由所述模腔内的树脂进行包覆形成光纤带。
  8. 根据权利要求7所述的模具，其特征在于：所述入口光纤孔孔径为定径光纤孔的1.03-1.06倍，所述出口光纤孔孔径为定径光纤孔的1.12-1.15倍。
  9. 根据权利要求8所述的模具，其特征在于：所述入口光纤孔、定径光纤孔和出口光纤孔孔间距为250-320um，入口光纤孔孔径为220-240um，定径光纤孔孔径为210-230um，出口光纤孔孔径为240-260um。
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