WO2021036112A1 - 易剥离柔性光纤微管 - Google Patents

易剥离柔性光纤微管 Download PDF

Info

Publication number
WO2021036112A1
WO2021036112A1 PCT/CN2019/126742 CN2019126742W WO2021036112A1 WO 2021036112 A1 WO2021036112 A1 WO 2021036112A1 CN 2019126742 W CN2019126742 W CN 2019126742W WO 2021036112 A1 WO2021036112 A1 WO 2021036112A1
Authority
WO
WIPO (PCT)
Prior art keywords
microtube
sheath
optical fiber
optical fibers
elastomer
Prior art date
Application number
PCT/CN2019/126742
Other languages
English (en)
French (fr)
Inventor
汪趁时
李新建
缪威玮
陆杰
周华
李强
Original Assignee
江苏中天科技股份有限公司
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 江苏中天科技股份有限公司 filed Critical 江苏中天科技股份有限公司
Publication of WO2021036112A1 publication Critical patent/WO2021036112A1/zh

Links

Images

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
    • G02B6/4429—Means specially adapted for strengthening or protecting the cables
    • G02B6/443—Protective covering

Definitions

  • the invention relates to the technical field of optical cables, in particular to an easily peelable flexible optical fiber microtube.
  • Optical fiber and sheath are the basic elements that make up the optical cable, and the optical fiber usually has a protective layer or protective tube outside, which is called a tight sleeve layer, a semi-tight sleeve layer or a loose tube.
  • Tight-buffered optical fiber is generally the basic component for manufacturing various indoor optical cables. It can be used alone and can be used to make pigtails. It is used for the connection of various active or passive devices and the connection of meters and terminal equipment.
  • the material of the tight-fitting layer is general. Low-smoke halogen-free flame-retardant polyolefin material LSZH, polyvinyl chloride material PVC or nylon material PA.
  • the Shore hardness H A of the tight sleeve material is usually greater than 90.
  • a loose tube is usually molded over the optical fiber.
  • the material of the loose tube is usually polybutylene terephthalate PBT, polycarbonate PC Or polypropylene PP.
  • H D Shore hardness loose tube is typically greater than 70, a medium hard plastic.
  • an easy-peelable flexible optical fiber microtube including a plurality of optical fibers, a microtube sheath covering the outside thereof, and a filler between the plurality of optical fibers and the microtube sheath, and the equivalent circumference of the plurality of optical fibers
  • the diameter of the inner cavity of the microtube sheath is less than 90% and greater than or equal to 70%, and the filler occupies 60% or more of the gap between a plurality of optical fibers and the microtube sheath, and blocks a plurality of optical fibers and microtubes
  • the inner wall of the sheath is in contact, and the microtube sheath is made of thermoplastic elastomer material.
  • the ratio of the equivalent circumferential diameter of the plurality of optical fibers in the inner cavity of the microtube sheath is between 70% and 80%.
  • thermoplastic elastomer material includes thermoplastic polyether ester elastomer, thermoplastic polyurethane-ester elastomer, thermoplastic polyurethane-ether elastomer, thermoplastic polyurethane ether ester elastomer, thermoplastic polyether amide elastomer, and thermoplastic polyester elastomer. Or a kind of thermoplastic polyurethane. Preference is given to thermoplastic polyester elastomers or thermoplastic polyetherester elastomers or thermoplastic polyurethanes, such as polybutylene terephthalate glycol block copolymers.
  • the thickness of the microtube sheath is 0.1-0.2 mm.
  • the filler includes silicone oil and thickener, and the mass ratio of the two is 20:1-10:1.
  • the filler is composed of 20 parts by mass of silicone oil and 1 part of thickener.
  • the filler is composed of 10 parts by mass of silicone oil and 1 part of thickener.
  • the thickening agent includes silica, bentonite, polytetrafluoroethylene or a mixture thereof.
  • the outer diameter of a single optical fiber is 250 ⁇ 10 ⁇ m, and when the number of optical fibers in the microtube sheath is 4, 6, 12, and 24, the outer diameter of the microtube is set to 0.9 ⁇ 0.1 mm, 1.1 ⁇ 0.1mm, 1.4 ⁇ 0.1mm and 2.0 ⁇ 0.1mm.
  • the outer diameter of a single optical fiber is 200 ⁇ 10 ⁇ m, and when the number of optical fibers in the microtube sheath is 4, 6, 12, and 24, the outer diameter of the microtube is set to 0.8 ⁇ 0.1 mm, 1.0 ⁇ 0.1mm, 1.3 ⁇ 0.1mm and 1.8 ⁇ 0.1mm.
  • the microtube sheath in the easy-peelable flexible optical fiber microtube provided by the present invention adopts elastomer materials, which can be peeled off with bare hands without the aid of tools; when the microtube sheath is peeled off, the gap filler acts as a buffer, and The material of the microtube sheath works in synergy and does not damage the optical fiber coating; the texture of the microtube sheath is soft and does not bend; the performance of the optical fiber microtube in the optical cable joint box is stable and does not shrink.
  • FIG. 1 is a schematic diagram of the structure of an easily peelable flexible optical fiber microtube in an embodiment of the present invention.
  • SZ twist in this article refers to left and right twist.
  • the twisting direction is divided into left and right directions.
  • the left direction resembles "S”, also called S direction
  • the right direction resembles "Z”, also called Z direction.
  • thermoplastic polyether ester elastomer also known as thermoplastic polyester elastomer TPEE
  • TPEE thermoplastic polyester elastomer
  • soft The segment and the uncrystallized hard segment form an amorphous continuous phase, and part of the hard segment crystallizes to form a dispersed phase, which acts as a physical cross-linking point.
  • the hard segment provides the mechanical strength and thermoplastic processing properties of TPEE; the soft segment provides low temperature resistance and elasticity.
  • thermoplastic polyester elastomer refers to a block copolymer of polyester hard segment and polyester soft segment.
  • thermoplastic polyurethane elastomer also known as thermoplastic polyurethane rubber, or TPU for short
  • TPU thermoplastic polyurethane rubber
  • A is a high molecular weight (1000-6000) polyester or polyether
  • B contains 2 ⁇ A diol with 12 straight-chain carbon atoms.
  • the chemical structure between the AB segments is a diisocyanate.
  • Thermoplastic polyurethane rubber is cross-linked by intermolecular hydrogen bonds or lightly cross-linked between macromolecular chains. As the temperature increases or decreases, these two cross-linked structures are reversible. In the molten state or the solution state, the intermolecular force is weakened, and after cooling or solvent volatilization, there is a strong intermolecular force to connect together, restoring the original solid properties.
  • Typical TPU such as spandex.
  • thermoplastic polyurethane, thermoplastic polyurethane-ester elastomer, thermoplastic polyurethane-ether elastomer, and thermoplastic polyurethane ether ester elastomer respectively mean that A includes only polyurethane, polyurethane and polyester, polyurethane and polyether, or polyurethane and polyether. Ether ester.
  • thermoplastic polyether amide elastomer herein is a polyether block amide structure, such as PEBA from Atochem, USA.
  • the present invention provides an easy-to-peel flexible optical fiber microtube 10, which includes a plurality of optical fibers 2 and a microtube sheath 1, wherein the microtube sheath 1 is covered with a plurality of optical fibers 2, and the surface layers of the plurality of optical fibers 2 are connected with Fillers 4 are filled between the inner walls of the microtube sheath 1.
  • the optical fiber 2 usually a single-mode optical fiber, has a protective coating on its surface; when multiple optical fibers 2 appear in each microtube sheath 1, they can be distinguished by coloring, that is, a colored optical fiber is formed.
  • the diameter of a single optical fiber 2 may be nominally 250 ⁇ m, 200 ⁇ m, or 180 ⁇ m.
  • the multiple optical fibers 2 are usually SZ stranded in the microtube sheath 1.
  • the microtube sheath 1 is an elastomer material with a wall thickness of 0.1-0.2mm, which can be torn off at least 1 meter without the aid of a tool.
  • the density of the micro tube sheath material generally 1 ⁇ 1.5g / cm 3, a tensile strength is generally 10 to 20 MPa, elongation at break of between 100% to 500%, Shore hardness of less than H D equal to 30, and Tear strength ⁇ 60kN/m.
  • the microtube sheath material can be a thermoplastic polyetherester elastomer, a thermoplastic polyurethane-ester elastomer, a thermoplastic polyurethane-ether elastomer, a thermoplastic polyurethane ether ester elastomer, a thermoplastic polyetheramide elastomer, a thermoplastic polyester elastomer or a thermoplastic One of polyurethane.
  • thermoplastic polyester elastomer or a thermoplastic polyetherester elastomer or a thermoplastic polyurethane, such as polybutylene terephthalate glycol block copolymer so that the optical fiber micropipe sheath can be easily torn off at least 1 meter without using a tool.
  • the performance of the thermoplastic elastomer is stable, the material shrinkage rate is less than 3%, the optical fiber microtube does not shrink in the joint box, and the communication stability of the optical cable communication line can be ensured.
  • the filler 4 is generally an ointment. In a specific embodiment, it is composed of a base silicone oil and a thickening agent.
  • the mass ratio of the silicone oil to the thickening agent is usually 20:1 to 10:1, and the thickening agent can be two Silicon oxide, bentonite, polytetrafluoroethylene or their mixtures.
  • the oxidation induction period of the above ointment is at a heating rate of 10°C/min.
  • the test temperature When the test temperature reaches 190°C, it is usually greater than 50min; the density is less than 0.85g/cm 3 ; when the shear frequency is 6s -1 at 25°C, its power The viscosity is greater than or equal to 15000mPa ⁇ S; when the shear frequency is 6s -1 at 70°C, the dynamic viscosity is greater than or equal to 10000mPa ⁇ S.
  • the present invention designs the above-mentioned ointment filling 60% or more of the cavity of the microtube sheath 1 (excluding the space occupied by the optical fiber) in the cross section of the optical fiber microtube 10, on the one hand, it can ensure that the optical fiber microtube 10 does not occur.
  • the ointment blocks the optical fiber 2 and the microtube sheath 1, and the ointment has certain elasticity.
  • the sheath 1 is peeled off, the ointment can digest and absorb part of the peeling force, and part of the buffer acts on the optical fiber. The shearing force on 2 will not cause damage to the optical fiber coating.
  • the present invention also designs that the equivalent circular diameter of several fibers in the section of the optical fiber microtube 10 is less than 90% of the inner diameter of the microtube sheath, so that the optical fiber 2 is in the microtube. A certain degree of space surplus is guaranteed in the sheath 1, so that it will not be in close contact with the optical fiber coating to produce a large peeling force and unavoidable friction.
  • the optical fiber microtube 10 has a number of fiber equivalent circumferential diameters greater than or equal to 70% of the inner diameter of the microtube sheath, so that the space area of the inner cavity of the microtube sheath 1 can be effectively used, so that the same number of fibers are contained in the microtube sheath.
  • the smaller outer diameter is conducive to the miniaturization and lightweight of the optical cable; in other words, under the premise of being easy to peel off and not damaging the optical fiber coating, ensure that the number of optical fibers in a certain size of microtube sheath is sufficient to ensure high communication capacity and High stability.
  • the number of fibers in the easy-stripping flexible optical fiber microtube 10 is 12 cores, that is, there are 12 fibers 2 in each microtube 10.
  • the colors of the fibers 2 are blue, orange, green, brown, gray, white, red, black, Yellow, purple, pink, cyan, G.652D fiber is used, the diameter of the fiber coating after coloring is 250 ⁇ m ⁇ 15 ⁇ m, and the 12 fibers in the microtube sheath 1 are SZ twisted.
  • the microtubule sheath 1 is filled with ointment, and the oxidation induction period is greater than 50 minutes; its composition includes 20 parts of silicone oil and 1 part of silicon dioxide; density is less than 0.85g/cm 3 ; at 25°C, the shear frequency is 6s At -1, its dynamic viscosity is 15200mPa ⁇ S; at 70°C and a shear frequency of 6s-1, its dynamic viscosity is 10800mPa ⁇ S.
  • the material of the microtube sheath 1 is polybutylene terephthalate glycol block copolymer, with a density of about 1.1g/cm 3 , a tensile strength of 17MPa, and a breaking elongation of 210%.
  • the microtube sheath, and the test results also show that the force does not exceed 10N and does not damage the internal optical fiber.
  • the outer diameter of the optical fiber microtube 10 is 1.4 ⁇ 0.1mm, and the ratio of the equivalent circumferential diameter of the optical fiber to the inner diameter of the microtube sheath is preferably 70-80%, that is, the space is sufficient to prevent fiber damage, and the space effective utilization rate is high. .
  • the equivalent circular diameter of the fiber is about 1.0mm
  • the thickness of the microtube sheath 1 is 0.1mm
  • the equivalent circular diameter of the fiber accounts for 60% of the inner diameter of the microtube sheath
  • the outer diameter of the fiber microtube is about Is 1.88mm
  • the fiber equivalent circular diameter accounts for 70% of the inner diameter of the microtube sheath
  • the outer diameter of the fiber microtube is about 1.63mm
  • the fiber equivalent circular diameter accounts for 90% of the inner diameter of the microtube sheath
  • the fiber microtube The outer diameter of the tube is about 1.31mm
  • the equivalent circumferential diameter of the optical fiber accounts for 80% of the inner diameter of the microtube sheath
  • the outer diameter of the optical fiber microtube is about 1.45mm
  • the proportion changes from 60% to 90% the outer diameter of the optical fiber microtube
  • the diameter is gradually reduced by 0.25mm (more than twice the value of the sheath thickness), 0.18mm and 0.14mm, and the shrinkage range is getting smaller and smaller.
  • each optical fiber microtube there are 24 optical fibers in each optical fiber microtube.
  • the colors of the optical fibers are blue, orange, green, brown, gray, white, red, black, yellow, purple, pink, and cyan.
  • the remaining 12 optical fibers are blue plus 1 black wire, orange plus 1 black wire, green plus 1 black wire, brown plus 1 black wire, gray plus 1 black wire, white plus 1 black wire, red plus 1 black wire, natural color plus 1
  • the optical fiber uses G.657A2 optical fiber, after coloring the optical fiber
  • the diameter of the coating is 200 ⁇ m ⁇ 10 ⁇ m
  • the optical fiber in the microtube sheath is SZ stranded.
  • the microtubule sheath is filled with ointment, and the oxidation induction period is greater than 50 minutes; its composition includes 10 parts of silicone oil, 0.5 part of bentonite and 0.5 part of polytetrafluoroethylene by weight; density is less than 0.85g/cm 3 ;
  • the shear frequency is 6s -1 at °C
  • the dynamic viscosity is 15200mPa ⁇ S
  • the shear frequency is 6s -1 at 70°C
  • the dynamic viscosity is 10800mPa ⁇ S.
  • the microtube sheath material is a thermoplastic polyetheramide elastomer, for example, the block structure is as follows:
  • the outer diameter of the optical fiber microtube is 1.8 ⁇ 0.1 mm, and the ratio of the equivalent circumferential diameter of the optical fiber to the inner diameter of the microtube sheath is also preferably 70-80%.
  • Table 1 below lists the different optical fiber outer diameters and quantities, and the preferred outer diameters of the optical fiber microtubes.
  • thermoplastic elastomer material microtubule sheathing material soft texture, H D Shore hardness less than 30, the minimum bend radius of up to 5mm, bending does not occur;
  • the jacket material Good elasticity, the prepared optical fiber microtube has stable heat and chemical resistance, no shrinkage in the connector box, and always protects the optical fiber;
  • the tear strength of the sheath material does not exceed 60kN/m, and it does not need to be peeled off.
  • Tool with a force of no more than 10N, stripped with bare hands, and the internally filled ointment has a buffer function, which cooperates with the properties of the sheath material, and does not damage the coating of the optical fiber during stripping.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

一种易剥离柔性光纤微管，包括若干光纤(2)和包覆在其外侧的微管护套(1)及若干光纤(2)与微管护套(1)之间的填充物(4)，若干光纤(2)等效圆周直径在微管护套(1)内腔的占比小于90％且大于等于70％，填充物(4)占若干光纤(2)与微管护套(1)之间空隙的60％及以上，并阻隔若干光纤(2)与微管护套(1)内壁接触，微管护套(1)为弹性体材料。微管护套(1)采用弹性体材料，可不借助工具，徒手开剥；在微管护套(1)剥离时，间隙填充物(4)作为缓冲，与微管护套(1)材料协同作用，不损伤光纤(2)涂层。

Description

易剥离柔性光纤微管 技术领域
本发明涉及光缆技术领域，特别是指一种易剥离柔性光纤微管。
背景技术
光纤和护套是组成光缆的基本元素，而光纤外面通常具有一层保护层或保护管，称为紧套层、半紧套层或松套管。紧套光纤一般是制造各种室内光缆的基本元件，可单独使用，可以用于制作尾纤，用于各类有源或无源器件的连接及仪表、终端设备的连接，紧套层材料一般为低烟无卤阻燃聚烯烃材料LSZH、聚氯乙烯材料PVC或尼龙材料PA。紧套材料的邵氏硬度H A通常大于90。在室外光缆中，为保护光纤不受内部应力和外部侧压力影响，通常在光纤外套塑一层松套管，松套管材料通常为聚对苯二甲酸丁二醇酯PBT、聚碳酸酯PC或聚丙烯PP。松套管材料的邵氏硬度H D通常大于70，属于中等硬质塑料。
上述紧套光纤紧套层和松套管剥离都需要使用专用工具进行开剥，在剥离紧套层或松套管时，容易造成光纤涂覆层损伤；且松套管质地硬，在弯曲半径小的地方，容易造成松套管弯折，导致衰减超标，甚至出现光纤断裂；松套管在光缆接头盒内发生收缩，容易导致光纤衰减增大。
发明内容
鉴于以上内容，有必要提供一种改进的易剥离柔性光纤微管，其护层可徒手开剥且不损伤光纤涂层，质地柔软不弯曲，制成微管性能稳定。
本发明提供的技术方案为：一种易剥离柔性光纤微管，包括若干光纤和包覆在其外侧的微管护套及若干光纤与微管护套之间的填充 物，若干光纤等效圆周直径在所述微管护套内腔的占比小于90％且大于等于70％，所述填充物占若干光纤与微管护套之间空隙的60％及以上，并阻隔若干光纤与微管护套内壁接触，所述微管护套为热塑性弹性体材料。
进一步地，若干光纤等效圆周直径在所述微管护套内腔的占比为70％-80％之间。
进一步地，所述热塑性弹性体材料包括热塑性聚醚酯弹性体、热塑性聚氨酯-酯弹性体、热塑性聚氨酯-醚弹性体、热塑性聚氨酯醚酯弹性体、热塑性聚醚酰胺弹性体、热塑性聚酯弹性体或热塑性聚氨酯中的一种。优选热塑性聚酯弹性体或热塑性聚醚酯弹性体或热塑性聚氨酯，如聚对苯二甲酸丁二酯乙二醇嵌段共聚物。
进一步地，所述微管护套的厚度为0.1-0.2mm。
进一步地，所述填充物包括硅油和增稠剂，两者的质量配比为20:1～10:1。
进一步地，所述填充物由质量份数为20份的硅油和1份的增稠剂组成。
进一步地，所述填充物由质量份数为10份的硅油和1份的增稠剂组成。
进一步地，所述增稠剂包括二氧化硅、膨润土、聚四氟乙烯或它们的混合物。
进一步地，单根所述光纤外径为250±10μm，当微管护套内光纤数量为4根、6根、12根和24根时，所述微管的外径设定为0.9±0.1mm、1.1±0.1mm、1.4±0.1mm和2.0±0.1mm。
进一步地，单根所述光纤外径为200±10μm，当微管护套内光纤数量为4根、6根、12根和24根时，所述微管的外径设定为0.8±0.1mm、1.0±0.1mm、1.3±0.1mm和1.8±0.1mm。
与现有技术相比，本发明提供的易剥离柔性光纤微管中微管护套采用弹性体材料，可不借助工具，徒手开剥；在微管护套剥离时，间隙填充物作为缓冲，与微管护套材料协同作用，不损伤光纤涂层；微 管护套质地柔软，不发生弯折；光纤微管在光缆接头盒内性能稳定，不发生收缩。
附图说明
下面结合附图和具体实施方式对本发明作进一步详细的说明。
图1为本发明一实施方式中易剥离柔性光纤微管的结构示意图。
附图标记说明:
柔性光纤微管                 10
微管护套                     1
光纤                         2
填充物                       4
如下具体实施方式将结合上述附图进一步说明本发明实施例。
具体实施方式
为了能够更清楚地理解本发明实施例的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行详细描述。需要说明的是，在不冲突的情况下，本申请的实施方式中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明实施例，所描述的实施方式仅是本发明一部分实施方式，而不是全部的实施方式。基于本发明中的实施方式，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施方式，都属于本发明实施例保护的范围。
本文中“SZ绞”为左右向绞。绞制的绞向有左向和右向之分，左向形似“S”又称S向，右向形似“Z”又称Z向。
本文中热塑性聚醚酯弹性体，又称热塑性聚酯弹性体TPEE，是 一种含有芳香族聚酯硬段和聚醚酯软段的呈两相分离微观结构的嵌段共聚物，其中，软段和未结晶硬段形成无定形连续相，部分硬段结晶形成分散相，起物理交联点的作用。硬段提供TPEE的机械强度和热塑性加工性能；软段提供耐低温性能和弹性。
本文中热塑性聚酯弹性体是指聚酯硬段和聚酯软段的嵌段共聚物。
众所周知，热塑性聚氨酯弹性体又称热塑性聚氨酯橡胶，简称TPU，是一种(AB)n型嵌段线性聚合物，A为高分子量(1000～6000)的聚酯或聚醚，B为含2～12直链碳原子的二醇，AB链段间化学结构是二异氰酸酯。热塑性聚氨酯橡胶靠分子间氢键交联或大分子链间轻度交联，随着温度的升高或降低，这两种交联结构具有可逆性。在熔融状态或溶液状态分子间力减弱，而冷却或溶剂挥发之后又有强的分子间力连接在一起，恢复原有固体的性能。典型的TPU如氨纶等。
本文中热塑性聚氨酯，热塑性聚氨酯-酯弹性体，热塑性聚氨酯-醚弹性体，热塑性聚氨酯醚酯弹性体分别是指A仅包括聚氨酯，包括聚氨酯和聚酯，包括聚氨酯和聚醚，或包括聚氨酯和聚醚酯。
本文中热塑性聚醚酰胺弹性体为聚醚嵌段酰胺结构体，如美国Atochem公司的PEBA。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明实施例的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本发明实施例。
请参阅图1，本发明提供了一种易剥离柔性光纤微管10，包括若干光纤2和微管护套1组成，其中微管护套1包覆在若干光纤2外，若干光纤2表层与微管护套1的内壁之间填充有填充物4。
光纤2，通常为单模光纤，其表层设有保护涂层；每一微管护套1内出现多根光纤2时，可以通过着色来区分，即形成着色光纤。单根光纤2的直径可以是标称250μm、200μm或180μm。多根光纤2 在微管护套1内通常为SZ绞合。多根光纤等效直径公式为：D＝1.16×n 1/2×d，其中n为光纤数量，d为光纤直径。
微管护套1，为弹性体材料，壁厚在0.1-0.2mm之间，可不借助工具徒手撕离至少1米。该微管护套材料的密度通常在1～1.5g/cm 3，抗拉强度通常为10-20MPa，断裂伸长率在100％～500％之间，邵氏硬度H D小于等于30，且撕裂强度≤60kN/m。该微管护套材料可以是热塑性聚醚酯弹性体、热塑性聚氨酯-酯弹性体、热塑性聚氨酯-醚弹性体、热塑性聚氨酯醚酯弹性体、热塑性聚醚酰胺弹性体、热塑性聚酯弹性体或热塑性聚氨酯中的一种。优选热塑性聚酯弹性体或热塑性聚醚酯弹性体或热塑性聚氨酯，如聚对苯二甲酸丁二酯乙二醇嵌段共聚物，从而光纤微管护层可不借助工具轻松撕离至少1米。该热塑性弹性体性能稳定，材料收缩率＜3％，光纤微管在接头盒内不发生收缩，可保证光缆通信线路通信稳定。
填充物4，一般为油膏，在具体实施方式中，由基础硅油和增稠剂组成，其中硅油与增稠剂的质量比例通常为20:1～10:1，该增稠剂可以为二氧化硅、膨润土、聚四氟乙烯或它们的混合物。上述油膏的氧化诱导期以10℃/min的升温速率，试验温度达到190℃时，通常大于50min；密度小于0.85g/cm 3；在25℃，剪切频率为6s -1时，其动力粘度大于等于15000mPa·S；在70℃，剪切频率为6s -1时，其动力粘度大于等于10000mPa·S。在具体实施方式中，本发明设计光纤微管10截面中上述油膏填充微管护套1内腔空隙(除去光纤所占空间)的60％及以上，一方面可保证光纤微管10不发生水的纵向渗漏，另一方面油膏阻隔了光纤2与微管护套1，且油膏具有一定的弹性，在护套1剥离时油膏可消化吸收部分剥离力，部分缓冲作用于光纤2上的剪切力，不至引起光纤涂层损伤。
为确保撕离微管护套1时不损伤光纤2的涂层，本发明还设计光纤微管10截面中若干光纤等效圆周直径小于微管护套内径的90％，使光纤2在微管护套1内保证一定的空间富余度，不至于与光纤涂层紧密接触而产生较大剥离力和不可避免的摩擦。同时优化设计光纤微 管10截面中若干光纤等效圆周直径大于等于微管护套内径的70％，如此可有效利用微管护套1内腔的空间面积，使得含相同数量光纤微管护套外径更小，有利于光缆的微型化、轻量化；换言之，在满足易剥离、不损伤光纤涂层的前提下，保证一定尺寸的微管护套内光纤数量足够多以确保通信高容量和高稳定性。
下面结合具体实施例对本发明的易剥离柔性光纤微管10的性能进行测试和验证。
实施例1
本例中易剥离柔性光纤微管10的光纤数量为12芯，即每根微管10内12根光纤2，光纤2颜色分别为蓝、橙、绿、棕、灰、白、红、黑、黄、紫、粉红、青绿，采用G.652D光纤，着色后光纤涂层直径为250μm±15μm，在微管护套1内12根光纤采用SZ绞。
本例中微管护套1内填充油膏，氧化诱导期大于50min；其组成包括20份硅油和1份二氧化硅组成；密度小于0.85g/cm 3；在25℃，剪切频率为6s-1时，其动力粘度为15200mPa·S；在70℃，剪切频率为6s-1时，其动力粘度为10800mPa·S。
本例中微管护套1材料为聚对苯二甲酸丁二酯乙二醇嵌段共聚物，密度约1.1g/cm 3，抗拉强度为17MPa，断裂伸长率为210％，邵氏硬度H D为21，且撕裂强度为54kN/m，其壁厚为0.1mm，也即是说，撕裂力＝54kN/m×0.1mm＝5.4N，可徒手不借助工具即可撕离微管护层，且试验结果还表明，用力不超过10N，不损伤内部光纤。
本例中光纤微管10外径为1.4±0.1mm，光纤等效圆周直径占微管护套内径的比值优选70-80％，即空间富余量充足不致纤维损伤，又使得空间有效利用率高。当光纤2直径为250μm，光纤等效圆周直径约为1.0mm，微管护套1厚度为0.1mm，光纤等效圆周直径占比微管护套内径的60％时，光纤微管外径约为1.88mm；光纤等效圆周直径占比微管护套内径的70％时，光纤微管外径约为1.63mm；光纤等效圆周直径占比微管护套内径的90％时，光纤微管外径约为1.31mm； 光纤等效圆周直径占比微管护套内径的80％时，光纤微管外径约为1.45mm；占比由60％变化至90％时，光纤微管外径逐步缩小0.25mm(高于两倍护套厚度值)、0.18mm和0.14mm，收缩的范围越变越小，结合空间余量的设计和油膏的使用量及成本，优选占比为70-80％。
实施例2
本例中每根光纤微管内设有24根光纤，光纤颜色分别为蓝、橙、绿、棕、灰、白、红、黑、黄、紫、粉、青绿，其余12根光纤为蓝色加1根黑色线、橙加1根黑色线、绿加1根黑色线、棕加1根黑色线、灰加1根黑色线、白加1根黑色线、红加1根黑色线、本色加1根黑色线、黄加1根黑色线、紫加1根黑色线、粉加1根黑色线、青绿加1根黑色线，相邻色线距离约150mm，光纤采用G.657A2光纤，着色后光纤涂层直径为200μm±10μm，在微管护套内光纤采用SZ绞。
本例中微管护套内填充油膏，氧化诱导期大于50min；其组成按重量计包括10份硅油和0.5份膨润土和0.5份聚四氟乙烯组成；密度小于0.85g/cm 3；在25℃，剪切频率为6s -1时，其动力粘度为15200mPa·S；在70℃，剪切频率为6s -1时，其动力粘度为10800mPa·S。
本例中微管护套材料为热塑性聚醚酰胺弹性体，例如嵌段结构如下：
Figure PCTCN2019126742-appb-000001
其密度约1.2g/cm 3，抗拉强度为18MPa，断裂伸长率为212％，邵氏硬度H D为22，且撕裂强度为53kN/m，其壁厚为0.15mm，撕裂力＝53kN/m×0.1mm＝7.95N。
本例中光纤微管外径为1.8±0.1mm，光纤等效圆周直径占微管 护套内径的比值同样优选70-80％。
以下表1列举了不同光纤外径及数量，优选的光纤微管外径的数值。
表1
Figure PCTCN2019126742-appb-000002
上述本发明的易剥离柔性光纤微管10采用热塑性弹性体材料作为微管护套材料，质地柔软，邵氏硬度H D小于30，最小弯曲半径可达5mm，不发生弯折；该护套材料弹性好，制得的光纤微管耐热、耐化学性能稳定，在接头盒内不会发生收缩，始终对光纤起保护；该护套材料撕裂强度不超过60kN/m，需剥离时可不借助工具，用力不超过10N，徒手开剥，而且内部填充的油膏具有缓冲功能，协同护套材料属性，剥离时不损伤光纤的涂层。
以上实施方式仅用以说明本发明实施例的技术方案而非限制，尽管参照以上较佳实施方式对本发明实施例进行了详细说明，本领域的普通技术人员应当理解，可以对本发明实施例的技术方案进行修改或等同替换都不应脱离本发明实施例的技术方案的精神和范围。

Claims (10)

  1. 一种易剥离柔性光纤微管，包括若干光纤和包覆在其外侧的微管护套及若干光纤与微管护套之间的填充物，其特征在于：若干光纤等效圆周直径在所述微管护套内腔的占比小于90％且大于等于70％，所述填充物占若干光纤与微管护套之间空隙的60％及以上，并阻隔若干光纤与微管护套内壁接触，所述微管护套为热塑性弹性体材料。
  2. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：若干光纤等效圆周直径在所述微管护套内腔的占比为70％-80％之间。
  3. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：所述热塑性弹性体材料包括热塑性聚醚酯弹性体、热塑性聚氨酯-酯弹性体、热塑性聚氨酯-醚弹性体、热塑性聚氨酯醚酯弹性体、热塑性聚醚酰胺弹性体、热塑性聚酯弹性体或热塑性聚氨酯中的一种。
  4. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：所述微管护套的厚度为0.1-0.2mm。
  5. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：所述填充物包括硅油和增稠剂，两者的质量配比为20:1～10:1。
  6. 根据权利要求5所述的易剥离柔性光纤微管，其特征在于：所述增稠剂包括二氧化硅、膨润土、聚四氟乙烯或它们的混合物。
  7. 根据权利要求5所述的易剥离柔性光纤微管，其特征在于：所述填充物由质量份数为20份的硅油和1份的增稠剂组成。
  8. 根据权利要求5所述的易剥离柔性光纤微管，其特征在于：所述填充物由质量份数为10份的硅油和1份的增稠剂组成。
  9. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：单根所述光纤外径为250±10μm，当微管护套内光纤数量为4根、6根、12根和24根时，所述微管的外径设定为0.9±0.1mm、1.1±0.1mm、1.4±0.1mm和2.0±0.1mm。
  10. 根据权利要求1所述的易剥离柔性光纤微管，其特征在于：单根所述光纤外径为200±10μm，当微管护套内光纤数量为4根、6 根、12根和24根时，所述微管的外径设定为0.8±0.1mm、1.0±0.1mm、1.3±0.1mm和1.8±0.1mm。
PCT/CN2019/126742 2019-08-30 2019-12-19 易剥离柔性光纤微管 WO2021036112A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910816816.4A CN110531475B (zh) 2019-08-30 2019-08-30 易剥离柔性光纤微管
CN201910816816.4 2019-08-30

Publications (1)

Publication Number Publication Date
WO2021036112A1 true WO2021036112A1 (zh) 2021-03-04

Family

ID=68665746

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/126742 WO2021036112A1 (zh) 2019-08-30 2019-12-19 易剥离柔性光纤微管

Country Status (2)

Country Link
CN (1) CN110531475B (zh)
WO (1) WO2021036112A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110531475B (zh) * 2019-08-30 2020-10-09 江苏中天科技股份有限公司 易剥离柔性光纤微管
CN114895416A (zh) * 2022-05-06 2022-08-12 杭州富通通信技术股份有限公司 带状光缆

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247599A (en) * 1992-06-05 1993-09-21 Sumitomo Electric Fiber Optics Corp. Steam resistant optical fiber cable
KR20020074642A (ko) * 2001-03-21 2002-10-04 엘지전선 주식회사 라이저급 광케이블
CN103235376A (zh) * 2013-03-27 2013-08-07 烽火通信科技股份有限公司 超细光纤松套管及其制造方法
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
CN105301714A (zh) * 2014-06-25 2016-02-03 上海鸿辉光通科技股份有限公司 一种微缆用光纤填充膏及其制备方法
CN208421348U (zh) * 2018-07-27 2019-01-22 江苏亨通光电股份有限公司 一种易开剥型层绞式高密光纤束气吹微缆
CN208861023U (zh) * 2018-11-01 2019-05-14 德阳汇川科技有限公司 微管式光缆
CN110531475A (zh) * 2019-08-30 2019-12-03 江苏中天科技股份有限公司 易剥离柔性光纤微管

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2842611B1 (fr) * 2002-07-19 2004-11-26 Acome Soc Coop Travailleurs Unite optique comprenant une gaine particuliere
CN201081769Y (zh) * 2006-12-29 2008-07-02 江苏通光信息有限公司 分布式应变测量光缆
CN202421588U (zh) * 2012-02-02 2012-09-05 武汉光导通信研究所 单元光缆
CN202600219U (zh) * 2012-04-10 2012-12-12 江苏亨通光电股份有限公司 易开剥配线光缆
CN103576263A (zh) * 2012-07-19 2014-02-12 江苏帝华线缆有限公司 中心管全干式光缆
CN203965682U (zh) * 2014-06-24 2014-11-26 上海哈威新材料技术股份有限公司 内置光缆微型管道
CN203965683U (zh) * 2014-06-24 2014-11-26 上海哈威新材料技术股份有限公司 Hdpe硅芯微型管道
CN204374494U (zh) * 2015-02-05 2015-06-03 上海裕荣光电科技股份有限公司 一种光纤周界安防系统振动光缆
CN205121031U (zh) * 2015-11-09 2016-03-30 江苏奥通光电缆科技有限公司 一种易剥离外护套的光缆
KR102672071B1 (ko) * 2017-01-03 2024-06-05 삼성전자주식회사 광 케이블 및 이를 포함한 광 케이블 어셈블리
CN106995592B (zh) * 2017-03-21 2019-07-16 江阴爱科森博顿聚合体有限公司 一种微缆微管pbt护套料及其制备方法
CN107515450A (zh) * 2017-09-27 2017-12-26 苏州胜信光电科技有限公司 一种便于安装定位的光缆
CN108074657A (zh) * 2018-01-29 2018-05-25 万达集团股份有限公司 一种柔性光纤复合海底电缆及其制备方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5247599A (en) * 1992-06-05 1993-09-21 Sumitomo Electric Fiber Optics Corp. Steam resistant optical fiber cable
KR20020074642A (ko) * 2001-03-21 2002-10-04 엘지전선 주식회사 라이저급 광케이블
CN103235376A (zh) * 2013-03-27 2013-08-07 烽火通信科技股份有限公司 超细光纤松套管及其制造方法
CN105301714A (zh) * 2014-06-25 2016-02-03 上海鸿辉光通科技股份有限公司 一种微缆用光纤填充膏及其制备方法
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
CN208421348U (zh) * 2018-07-27 2019-01-22 江苏亨通光电股份有限公司 一种易开剥型层绞式高密光纤束气吹微缆
CN208861023U (zh) * 2018-11-01 2019-05-14 德阳汇川科技有限公司 微管式光缆
CN110531475A (zh) * 2019-08-30 2019-12-03 江苏中天科技股份有限公司 易剥离柔性光纤微管

Also Published As

Publication number Publication date
CN110531475B (zh) 2020-10-09
CN110531475A (zh) 2019-12-03

Similar Documents

Publication Publication Date Title
US6748146B2 (en) Communication cable having a soft housing
US7304242B1 (en) Shrinkable closure
US6374023B1 (en) Communication cable containing novel filling material in buffer tube
ES2710886T3 (es) Cable de telecomunicaciones equipado con fibras ópticas protegidas herméticas
JP4856180B2 (ja) 機械的に剥ぎ取り可能なアップコーテッド光ファイバ
US6215931B1 (en) Flexible thermoplastic polyolefin elastomers for buffering transmission elements in a telecommunications cable
WO2021036112A1 (zh) 易剥离柔性光纤微管
EP1331502B1 (en) Optical cable housing an optical unit surrounded by a plurality of gel layers
CN100365458C (zh) 具有优先撕裂部分的可剥离缓冲层及其制造方法
JP3596511B2 (ja) 光ファイバケーブル
AU2009352951B2 (en) Optical communication cable and manufacturing process
WO2021036110A1 (zh) 易剥离干式光纤微管和全干式微束光缆
WO2021036111A1 (zh) 全干式微束光缆
CN101849335A (zh) 用于密封含流体电缆的制品和方法
KR940000838B1 (ko) 방수형 광파이버 케이블
US9442264B1 (en) Tight buffered optical fibers and optical fiber cables
EP1376181B1 (en) Buffered optical fibers and methods of making same
US11789228B2 (en) Jetting optimized outdoor and indoor multi-function drop cable
EP3705525A1 (en) Micro-beam tube for cables and cable comprising micro-beam tube
CN110867275B (zh) 一种电缆结构及该电缆结构的制作方法
JP2001159725A (ja) 光ファイバユニット
WO2002042822A1 (en) Communication cable containing novel filling material
EP3464413A1 (en) Material formulation for over mold cover fiber optic cable
TWI764004B (zh) 高強度耐彎曲細徑光纜
US20240288645A1 (en) High fiber density optical fiber cable

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19943782

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19943782

Country of ref document: EP

Kind code of ref document: A1