WO2021082687A1 - 一种全介质中心束管式防鼠防蚁防雷光缆及其制备工艺 - Google Patents

一种全介质中心束管式防鼠防蚁防雷光缆及其制备工艺 Download PDF

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WO2021082687A1
WO2021082687A1 PCT/CN2020/111637 CN2020111637W WO2021082687A1 WO 2021082687 A1 WO2021082687 A1 WO 2021082687A1 CN 2020111637 W CN2020111637 W CN 2020111637W WO 2021082687 A1 WO2021082687 A1 WO 2021082687A1
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glass fiber
sheath
layer
optical cable
proof
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PCT/CN2020/111637
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English (en)
French (fr)
Inventor
彭孝平
王瑞
张萍
乐海音
余旭洋
张露露
薄双商
叶志强
钱晓倩
丁志飞
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江苏亨通光电股份有限公司
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Publication of WO2021082687A1 publication Critical patent/WO2021082687A1/zh

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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
    • G02B6/443—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
    • G02B6/44384—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
    • G02B6/4479—Manufacturing methods of optical 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
    • G02B6/4479—Manufacturing methods of optical cables
    • G02B6/4486—Protective covering

Definitions

  • the invention relates to the technical field of photoelectric composite cable structures, in particular to a full-medium central bundle tube type anti-mouse and anti-ant lightning-proof optical cable.
  • the invention also provides a preparation process for the anti-mouse and anti-ant lightning-proof optical cable.
  • optical cables are increasingly used in various complex indoor application scenarios. Due to the special laying scene, the material selection of the optical cable should also be specially considered. First of all, it is required that the optical cable has sufficient resistance to rodents and ants, to reduce the phenomenon of damage to the optical cable by biting, so as to ensure sufficient service life of the optical cable.
  • the existing central beam tube type anti-rodent and anti-termite optical cable mainly adopts non-metallic reinforced yarn, non-metallic reinforced tape or metal steel tape armor.
  • This kind of structure has certain anti-rodent and anti-term performance, but the performance of non-metallic structure is limited. In areas with severe rodent and ant damage, it is vulnerable to bite damage and has a limited service life. At the same time, the metal armored structure is easy to introduce lightning damage, and the safety is not good.
  • a new type of photoelectric composite cable for indoor wireless distribution system which is characterized in that it comprises an outer sheath, a middle sheath, a glass fiber tape layer, an inner sheath, and glass fiber arranged in sequence from the outside to the inside and the cross section is annular.
  • Yarn layer, loose tube, an optical fiber is arranged in the inner cavity of the loose tube, fiber paste is filled in the space between the optical fiber and the inner wall of the loose tube, and glass fiber yarn is wrapped around the outer circumference of the loose tube
  • a glass fiber yarn layer is formed, and the glass fiber tape is wrapped around the outer circumference of the inner sheath to form a glass fiber tape layer.
  • the fiber paste filled in the loose tube is specifically a water-blocking fiber paste
  • the unilateral thickness of the glass fiber yarn layer is 0.3 mm to 0.8 mm;
  • the glass fiber yarn of the glass fiber yarn layer adopts water-blocking yarn to meet the water seepage requirement of the optical cable
  • the unilateral thickness of the inner sheath is 0.8 mm to 1.2 mm, and the material of the inner sheath is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene;
  • the inner sheath is arranged with a first tear rope twisted by aramid and polyester yarn;
  • At least two water blocking yarns are placed across the outer surface of the inner sheath, and the density of the water blocking yarn is 400-1000 dtex, which meets the longitudinal water blocking performance of the optical cable;
  • the unilateral thickness of the glass fiber tape layer is 0.3 mm to 0.8 mm;
  • the unilateral thickness of the middle sheath is 1.2mm ⁇ 1.5mm, the material of the middle sheath is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene, and the middle sheath is arranged with aramid fiber Twisted second tear rope;
  • the unilateral thickness of the outer sheath is 0.5 mm to 0.6 mm, and the material of the outer sheath is specifically nylon.
  • a preparation process of an anti-mouse and anti-termite lightning-proof optical cable which is characterized in that: the optical fiber is colored and then sheathed, filled with fiber paste to form a loose tube, and then the glass fiber yarn is wrapped to form a glass fiber yarn layer and an inner sheath.
  • the process is carried out synchronously, and then the double-layer co-extrusion process of longitudinally wrapping the glass fiber tape layer, the middle sheath and the outer sheath is carried out simultaneously. After the inspection is qualified, the optical cable is packaged and shipped.
  • the sleeve adopts a constant pay-off tension to pay off to ensure the control of the excess length of the optical cable product ⁇ 3 ⁇ 7 ⁇ ;
  • a water-blocking yarn cross-winding device is arranged between the inner sheath and the glass fiber tape layer, so that at least two water-blocking yarns are placed across the outer surface of the inner sheath;
  • the outer surface of the glass fiber tape is attached with enough glue to make it adhere closely to the middle sheath;
  • a certain amount of water-blocking glass fiber yarn is wound outside the casing, and polyethylene is extruded at the same time. It is necessary to ensure the uniformity of the glass fiber yarn and the roundness of the outer diameter after the inner protection.
  • a constant glass fiber tape is used to pay off. Choose the appropriate inner sheath pay-off tension and the size of the glass fiber tape to ensure that the glass fiber tape is longitudinally wrapped and rounded and does not form an overlap.
  • the outer sheath nylon layer and the polyethylene layer must be tightly combined, and there will be no delamination after extrusion, so as to meet the roundness of the total thickness and outer diameter of the optical cable;
  • the double-layer co-extrusion process is specifically the simultaneous use of high-density polyethylene and nylon double-layer co-extrusion for the middle and outer sheaths.
  • the nylon material must be dried before being used. The drying temperature is 100°C, and the time is at least 2 hours. The drying box must be cleaned before feeding. If there are small pores on the cable surface during production, the nylon material must be dried again.
  • an adhesive must be added to the polyethylene material to make the polyethylene and nylon adhere tightly. The adhesive must also be dried before use to ensure that it is fully dried, and the mixer must be cleaned before mixing to prevent cross-material contamination.
  • zone 1 The temperature of each zone in the co-extrusion process is: zone 1, 215°C; zone 2, 220°C ; Zone 3, 230°C; Zone 4, 240°C; Zone 5, 250°C; Extruder, 255°C; Die, 255°C.
  • the present invention adopts a three-sheath full-medium structure, and adopts a glass fiber yarn + glass fiber tape double-layer armored structure to form a full-medium non-metallic protective layer of sufficient strength.
  • the glass fiber yarn can also improve the tensile strength of the optical cable.
  • Strength the outer sheath adopts nylon sheath, which has high hardness and smooth appearance, and has the effect of multi-layer rodent and ant-proof.
  • the outer diameter of the optical cable is small, which is conducive to construction and maintenance;
  • the glass fiber tape is made of glass fiber roving or bulky treatment
  • the glass fiber yarn is knitted and woven. The thickness is relatively thick.
  • the glass fiber stabs the mouth of rodents, which is anti- Rat function;
  • the smooth nylon outer protective material has higher hardness, which increases the difficulty of biting by rodents and ants, and further enhances the protective ability of the optical cable; when the optical cable is laid in the area of rodent and ant infestation, the double-layer armor of the optical cable
  • the layer and the three-layer sheath layer play a role of anti-rodent and anti-termite, thereby protecting the cable core from damage and protecting the optical fiber from being damaged. It can be used in areas with more severe rodent and ant damage to ensure sufficient service life of the optical fiber and cable.
  • Figure 1 is a schematic cross-sectional view of the structure of the optical cable of the present invention.
  • Figure 2 is a schematic block diagram of the process flow of the optical cable of the present invention.
  • a new type of photoelectric composite cable for indoor wireless distribution system see Figure 1: It includes an outer sheath 1, a middle sheath 2, a glass fiber tape layer 3, and an inner sheath that are arranged in sequence from the outside to the inside and are annular in cross section. 4.
  • Glass fiber yarn layer 5 loose tube 6, optical fiber 7 is arranged in the inner cavity of loose tube 6, fiber paste 8 is filled in the space between the inner wall of optical fiber 7 and loose tube 6, and glass fiber yarn is wrapped around The outer circumference of the loose tube forms a glass fiber yarn layer 5, and the glass fiber tape is wrapped around the outer circumference of the inner sheath to form a glass fiber tape layer 3.
  • the fiber 8 paste filled in the loose tube 6 is specifically a water-blocking fiber paste
  • the unilateral thickness of the glass fiber yarn layer 5 is 0.3mm ⁇ 0.8mm;
  • the unilateral thickness of the inner sheath 4 is 0.8mm-1.2mm, and the material of the inner sheath 4 is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene;
  • the inner sheath 4 is arranged with a first tear rope twisted by aramid and polyester yarn;
  • At least two water-blocking yarns are placed across the outer surface of the inner sheath 4, and the density of the water-blocking yarns is 400-1000 dtex, which meets the longitudinal water-blocking performance of the optical cable;
  • the unilateral thickness of the glass fiber tape layer 3 is 0.3mm ⁇ 0.8mm;
  • the unilateral thickness of the middle sheath 2 is 1.2mm ⁇ 1.5mm.
  • the material of the middle sheath 2 is specifically high-density polyethylene, medium-density polyethylene or linear low-density polyethylene.
  • the thickness of one side of the outer sheath 1 is 0.5 mm to 0.6 mm, and the material of the outer sheath 1 is specifically nylon.
  • glass fiber yarn + glass fiber tape double-layer armored structure to form a full-medium non-metallic protective layer of sufficient strength, and glass fiber yarn can also improve the tensile strength of the optical cable; outer sheath
  • the nylon sheath is high in hardness and smooth in appearance. It has multi-layer rodent and anti-termite effects.
  • the outer diameter of the optical cable is small, which is conducive to construction and maintenance.
  • the glass fiber tape is knitted with glass fiber roving or bulky glass fiber yarn.
  • FIG. 2 A preparation process of an anti-mouse and anti-termite lightning-proof optical cable is shown in Figure 2: After the optical fiber is colored, it is sheathed and filled with fiber paste to form a loose tube, and then the glass fiber yarn is wrapped to form a glass fiber yarn layer and an inner sheath. The process is carried out synchronously, and then the double-layer co-extrusion process of longitudinally wrapping the glass fiber tape layer, the middle sheath and the outer sheath is carried out simultaneously. After the inspection is qualified, the optical cable is packaged and shipped.
  • the sleeve adopts a constant pay-off tension to pay off to ensure the control of the excess length of the optical cable product ⁇ 3 ⁇ 7 ⁇ ;
  • a water-blocking yarn cross-winding device is arranged between the inner sheath and the glass fiber tape layer, so that at least two water-blocking yarns are placed across the outer surface of the inner sheath;
  • a certain amount of water-blocking glass fiber yarn is wound outside the casing, and polyethylene is extruded at the same time. It is necessary to ensure the uniformity of the glass fiber yarn and the roundness of the outer diameter after the inner protection.
  • a constant glass fiber tape is used to pay off. Choose the appropriate inner sheath pay-off tension and the size of the glass fiber tape to ensure that the glass fiber tape is longitudinally wrapped and rounded and does not form an overlap.
  • the outer sheath nylon layer and the polyethylene layer must be tightly combined, and there will be no delamination after extrusion, so as to meet the roundness of the total thickness and outer diameter of the optical cable;
  • the double-layer co-extrusion process is specifically the simultaneous use of high-density polyethylene and nylon double-layer co-extrusion for the middle and outer sheaths.
  • the nylon material must be dried before being used. The drying temperature is 100°C, and the time is at least 2 hours. The drying box must be cleaned before feeding. If there are small pores on the cable surface during production, the nylon material must be dried again.
  • an adhesive must be added to the polyethylene material to make the polyethylene and nylon adhere tightly and adhere to each other. Before using the agent, it must be dried to ensure that it is fully dried, and the mixer must be cleaned before mixing to prevent cross-material contamination.
  • Stability control of the excess length of the optical fiber The excess length of the optical fiber in the coating process is controlled by (0.5 ⁇ 1.0) ⁇ 0.3 ⁇ .
  • the sleeve adopts a constant pay-off tension to ensure the remaining fiber of the optical cable. Long control ⁇ 3 ⁇ 7 ⁇ .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

本发明提供了一种全介质中心束管式防鼠防蚁防雷光缆，其可使用于鼠害、蚁害较严重地带，保证光纤光缆足够的使用寿命。其包括由外向内依次排列的横截面为圆环状的外护套、中护套、玻璃纤维带层、内护套、玻璃纤维纱层、松套管，所述松套管的内腔内布置有光纤，所述光纤和松套管的内壁的空间内填充有纤膏，玻璃纤维纱绕包于所述松套管的外周形成玻璃纤维纱层，玻璃纤维带绕包于所述内护套的外周形成玻璃纤维带层。

Description

一种全介质中心束管式防鼠防蚁防雷光缆及其制备工艺 技术领域
本发明涉及光电复合缆结构的技术领域，具体为一种全介质中心束管式防鼠防蚁防雷光缆，本发明还提供了该防鼠防蚁防雷光缆的制备工艺。
背景技术
随着光缆技术的不断发展，光缆越来越多的应用于各种复杂的室内应用场景。由于敷设场景特殊，故光缆的材料选择也应该特殊考虑。首先要求光缆具有足够的防鼠防蚁强度，减少光缆被啮咬破坏的现象，从而保证光缆足够的使用寿命。
目前现有中心束管式防鼠防蚁光缆主要采用非金属加强纱线、非金属增强带或金属钢带铠装，此种结构具备一定的防鼠防蚁性能，但非金属结构性能有限，在鼠害、蚁害严重地带，易受到啮咬破坏，使用寿命有限，同时金属铠装结构易引入雷电破坏，安全性不佳。
发明内容
针对上述问题，本发明提供了一种全介质中心束管式防鼠防蚁防雷光缆，其可使用于鼠害、蚁害较严重地带，保证光纤光缆足够的使用寿命。
一种新型室内无线分布系统用光电复合缆，其特征在于：其包括由外向内依次排列的横截面为圆环状的外护套、中护套、玻璃纤维带层、内护套、玻璃纤维纱层、松套管，所述松套管的内腔内布置有光纤，所述光纤和松套管的内壁的空间内填充有纤膏，玻璃纤维纱绕包于所述松套管的外周形成玻璃纤维纱层，玻璃纤维带绕包于所述内护套的外周形成玻璃纤维带层。
其进一步特征在于：
所述松套管内填充的纤膏具体为阻水纤膏；
所述玻璃纤维纱层的单边厚度为0.3mm～0.8mm；
所述玻璃纤维纱层的玻璃纤维纱采用阻水纱，以此来满足光缆渗水要求；
所述内护套的单边厚度为0.8mm～1.2mm，所述内护套的材质具体为高密度聚乙烯、中密度聚乙烯或线性低密度聚乙烯；
所述内护套布置有芳纶和聚酯纱拧成的第一撕裂绳；
所述内护套外表面交叉放置至少两根阻水纱，所述阻水纱的密度为400～1000dtex，满足光缆纵向阻水性能；
所述玻璃纤维带层的的单边厚度为0.3mm～0.8mm；
所述中护套的单边厚度为1.2mm～1.5mm，所述中护套的材质具体为高密度聚乙烯、中密度聚乙烯或线性低密度聚乙烯，所述中护套布置有芳纶拧成的第二撕裂绳；
所述外护套的单边厚度为0.5mm～0.6mm，所述外护套的材质具体为尼龙。
一种防鼠防蚁防雷光缆的制备工艺，其特征在于：将光纤着色后进行套塑、填充纤膏形成松套管，之后玻璃纤维纱绕包形成玻璃纤维纱层和内护套两个工序同步进行，之后纵包玻璃纤维带层和中护套、外护套的双层共挤工序同步进行，之后检测合格后，将光缆包装出厂。
其进一步特征在于：套塑工序光纤余长按(0.5～1.0)±0.3‰控制；
内护套工序生产过程中，套管采用恒定的放线张力放线，保证光缆成品余长控制≥3～7‰；
在内护套和玻璃纤维带层之间设置一个阻水纱交叉绕放装置，使得内护 套外表面交叉放置至少两根阻水纱；
所述玻璃纤维带的外表面有足够的胶水附着，使其与中护套粘连紧密；
套管外绕放一定数量的阻水型玻璃纤维纱，同时挤塑聚乙烯，需保证玻璃纤维纱包覆均匀以及内护后外径的圆整性，采用恒定的玻璃纤维带放线张力，选择适宜的内护放线张力和玻璃纤维带尺寸，保证玻璃纤维带纵包成型圆整且不形成搭接。双层共挤工艺中，外护尼龙层和聚乙烯层需结合紧密，挤出后不分层，以此来满足光缆总厚度及外径的圆整性；
双层共挤工序具体为中护套、外护套同步采用高密度聚乙烯和尼龙双层共挤，尼龙料使用前，必须烘干，烘干温度100℃，时间最少2小时，且要求烘料之前一定要清理干净烘料箱，生产中如果出现缆表有小气孔，尼龙料必须再次烘干，生产时聚乙烯料中按添加粘合剂，使得聚乙烯和尼龙粘接紧密，所述粘合剂使用前，也必须烘干，保证其得到充分干燥，且混料之前要清理干净搅拌机，防止交叉料污染，在共挤过程各区温度为：1区、215℃；2区、220℃；3区、230℃；4区、240℃；5区、250℃；挤出机、255℃；模口、255℃。
采用本发明后，其采用三护套全介质结构，采用玻璃纤维纱+玻璃纤维带双层铠装结构，形成足够强度的全介质非金属防护层，同时玻璃纤维纱还可提高光缆的抗拉强度；外护套采用尼龙护层，其硬度高、外表光滑，具有多层防鼠防蚁的功效，同时光缆外径小，利于施工维护；玻璃纤维带采用玻璃纤维粗纱、或经膨松处理的玻璃纤维纱针织、编织加工而成，厚度较厚，具有质量轻、高强度、耐高温、绝缘隔热、阻燃的优越性能，使用过程中通过玻璃纤维刺伤鼠类的口腔，具有防鼠功能；另外，光滑的尼龙外护材料，硬度更高，增加鼠类蚁类啃咬难度，进一步增强光缆的防护能力；当光缆敷设 于鼠害、蚁害的区域，光缆的双层铠装层和三层护套层起到防鼠防蚁功能，从而保护缆芯不受伤害，保护光纤不被损坏，其可使用于鼠害、蚁害较严重地带，保证光纤光缆足够的使用寿命。
附图说明
图1为本发明的光缆的横截面剖视结构示意图；
图2为本发明的光缆的工艺流程示意框图；
图2中序号所对应的名称如下：
外护套1、中护套2、玻璃纤维带层3、内护套4、玻璃纤维纱层5、松套管6、光纤7、纤膏8。
具体实施方式
一种新型室内无线分布系统用光电复合缆，见图1：其包括由外向内依次排列的横截面为圆环状的外护套1、中护套2、玻璃纤维带层3、内护套4、玻璃纤维纱层5、松套管6，松套管6的内腔内布置有光纤7，光纤7和松套管6的内壁的空间内填充有纤膏8，玻璃纤维纱绕包于松套管的外周形成玻璃纤维纱层5，玻璃纤维带绕包于内护套的外周形成玻璃纤维带层3。
松套管6内填充的纤8膏具体为阻水纤膏；
玻璃纤维纱层5的单边厚度为0.3mm～0.8mm；
玻璃纤维纱层5的玻璃纤维纱采用阻水纱，以此来满足光缆渗水要求；
内护套4的单边厚度为0.8mm～1.2mm，内护套4的材质具体为高密度聚乙烯、中密度聚乙烯或线性低密度聚乙烯；
内护套4布置有芳纶和聚酯纱拧成的第一撕裂绳；
内护套4外表面交叉放置至少两根阻水纱，阻水纱的密度为400～ 1000dtex，满足光缆纵向阻水性能；
玻璃纤维带层3的的单边厚度为0.3mm～0.8mm；
中护套2的单边厚度为1.2mm～1.5mm，中护套2的材质具体为高密度聚乙烯、中密度聚乙烯或线性低密度聚乙烯，中护套布置有芳纶拧成的第二撕裂绳；
外护套1的单边厚度为0.5mm～0.6mm，外护套1的材质具体为尼龙。
其采用三护套全介质结构，采用玻璃纤维纱+玻璃纤维带双层铠装结构，形成足够强度的全介质非金属防护层，同时玻璃纤维纱还可提高光缆的抗拉强度；外护套采用尼龙护层，其硬度高、外表光滑，具有多层防鼠防蚁的功效，同时光缆外径小，利于施工维护；玻璃纤维带采用玻璃纤维粗纱、或经膨松处理的玻璃纤维纱针织、编织加工而成，厚度较厚，具有质量轻、高强度、耐高温、绝缘隔热、阻燃的优越性能，使用过程中通过玻璃纤维刺伤鼠类的口腔，具有防鼠功能；另外，光滑的尼龙外护材料，硬度更高，增加鼠类蚁类啃咬难度，进一步增强光缆的防护能力；当光缆敷设于鼠害、蚁害的区域，光缆的双层铠装层和三层护套层起到防鼠防蚁功能，从而保护缆芯不受伤害，保护光纤不被损坏，其可使用于鼠害、蚁害较严重地带，保证光纤光缆足够的使用寿命。
一种防鼠防蚁防雷光缆的制备工艺，见图2：将光纤着色后进行套塑、填充纤膏形成松套管，之后玻璃纤维纱绕包形成玻璃纤维纱层和内护套两个工序同步进行，之后纵包玻璃纤维带层和中护套、外护套的双层共挤工序同步进行，之后检测合格后，将光缆包装出厂。
套塑工序光纤余长按(0.5～1.0)±0.3‰控制；
内护套工序生产过程中，套管采用恒定的放线张力放线，保证光缆成品余长控制≥3～7‰；
在内护套和玻璃纤维带层之间设置一个阻水纱交叉绕放装置，使得内护套外表面交叉放置至少两根阻水纱；
玻璃纤维带的外表面有足够的胶水附着，使其与中护套粘连紧密；
套管外绕放一定数量的阻水型玻璃纤维纱，同时挤塑聚乙烯，需保证玻璃纤维纱包覆均匀以及内护后外径的圆整性，采用恒定的玻璃纤维带放线张力，选择适宜的内护放线张力和玻璃纤维带尺寸，保证玻璃纤维带纵包成型圆整且不形成搭接。双层共挤工艺中，外护尼龙层和聚乙烯层需结合紧密，挤出后不分层，以此来满足光缆总厚度及外径的圆整性；
双层共挤工序具体为中护套、外护套同步采用高密度聚乙烯和尼龙双层共挤，尼龙料使用前，必须烘干，烘干温度100℃，时间最少2小时，且要求烘料之前一定要清理干净烘料箱，生产中如果出现缆表有小气孔，尼龙料必须再次烘干，生产时聚乙烯料中按添加粘合剂，使得聚乙烯和尼龙粘接紧密，粘合剂使用前，也必须烘干，保证其得到充分干燥，且混料之前要清理干净搅拌机，防止交叉料污染，在共挤过程各区温度为：1区、215℃；2区、220℃；3区、230℃；4区、240℃；5区、250℃；挤出机、255℃；模口、255℃。
工艺的有益效果如下：
1、光缆光纤余长的稳定性控制：套塑工序光纤余长按(0.5～1.0)±0.3‰控制，内护工序生产过程中，套管采用恒定的放线张力放线，保证光缆成品余长控制≥3～7‰。
2、光缆纵向渗水性能：套管和内护之间采用阻水型玻璃纤维纱，在内护 和玻璃纤维带之间设置一个阻水纱交叉绕放装置，同时由于玻璃纤维带外表面有足够的胶水附着，可使其与外护粘连紧密，保证光缆渗水性能满足标准要求，同时也提高了光缆的防水性能，有利于延长光缆的使用寿命。
3、松套管外圈与双层共挤工艺控制：松套管外绕放一定数量的阻水型玻璃纤维纱，同时挤塑聚乙烯，需保证玻璃纤维纱包覆均匀以及内护后外径的圆整性，通过采用恒定的玻璃纤维带放线张力，选择适宜的内护放线张力和玻璃纤维带尺寸，保证玻璃纤维带纵包成型圆整且不形成搭接，在双层共挤工艺中，尼龙外护套层和聚乙烯中护套层需结合紧密，挤出后不分层，以此来满足光缆总厚度及外径的圆整性。
其为其他类型全介质中心束管式高强度防鼠防蚁防雷光缆的开发提供了全新思路；证明小芯数高强度防鼠防蚁防雷光缆，采用中心束管式轻型全介质结构是可以实现的；结构满足光缆管道、野外架空使用的拉伸、渗水等全性能试验要求和光纤光缆基本测试性能；为其他高强度类型光缆产品提供了方向。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚起 见，本领域技术人员应当将说明书作为一个整体，各实施例中的技术方案也可以经适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (10)

  1. 一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：其包括由外向内依次排列的横截面为圆环状的外护套、中护套、玻璃纤维带层、内护套、玻璃纤维纱层、松套管，所述松套管的内腔内布置有光纤，所述光纤和松套管的内壁的空间内填充有纤膏，玻璃纤维纱绕包于所述松套管的外周形成玻璃纤维纱层，玻璃纤维带绕包于所述内护套的外周形成玻璃纤维带层。
  2. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述玻璃纤维纱层的单边厚度为0.3mm～0.8mm；所述玻璃纤维纱层的玻璃纤维纱采用阻水纱。
  3. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述内护套的单边厚度为0.8mm～1.2mm，所述内护套布置有芳纶和聚酯纱拧成的第一撕裂绳。
  4. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述内护套外表面交叉放置至少两根阻水纱，所述阻水纱的密度为400～1000dtex。
  5. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述玻璃纤维带层的的单边厚度为0.3mm～0.8mm。
  6. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述中护套的单边厚度为1.2mm～1.5mm，所述中护套布置有芳纶拧成的第二撕裂绳。
  7. 如权利要求1所述的一种全介质中心束管式防鼠防蚁防雷光缆，其特征在于：所述外护套的单边厚度为0.5mm～0.6mm，所述外护套的材质具体为尼龙。
  8. 一种防鼠防蚁防雷光缆的制备工艺，其特征在于：将光纤着色后进行套塑、填充纤膏形成松套管，之后玻璃纤维纱绕包形成玻璃纤维纱层和内护套两个工序同步进行，之后纵包玻璃纤维带层和中护套、外护套的双层共挤工序同步进行，之后检测合格后，将光缆包装出厂。
  9. 如权利要求8所述的一种防鼠防蚁防雷光缆的制备工艺，其特征在于：套塑工序光纤余长按(0.5～1.0)±0.3‰控制；
    内护套工序生产过程中，套管采用恒定的放线张力放线，保证光缆成品余长控制≥3～7‰；
    在内护套和玻璃纤维带层之间设置一个阻水纱交叉绕放装置，使得内护套外表面交叉放置至少两根阻水纱；
    所述玻璃纤维带的外表面有足够的胶水附着，使其与中护套粘连紧密；
    套管外绕放一定数量的阻水型玻璃纤维纱，同时挤塑聚乙烯，需保证玻璃纤维纱包覆均匀以及内护后外径的圆整性，采用恒定的玻璃纤维带放线张力，选择适宜的内护放线张力和玻璃纤维带尺寸，保证玻璃纤维带纵包成型圆整且不形成搭接。双层共挤工艺中，外护尼龙层和聚乙烯层需结合紧密，挤出后不分层，以此来满足光缆总厚度及外径的圆整性。
  10. 如权利要求8所述的一种防鼠防蚁防雷光缆的制备工艺，其特征在于：双层共挤工序具体为中护套、外护套同步采用高密度聚乙烯和尼龙双层共挤，尼龙料使用前，必须烘干，烘干温度100℃，时间最少2小时，且要求烘料之前一定要清理干净烘料箱，生产中如果出现缆表有小气孔，尼龙料必须再次烘干，生产时聚乙烯料中按添加粘合剂，使得聚乙烯和尼龙粘接紧密，所述粘合剂使用前，也必须烘干，保证其得到充分干燥，且混料之前要 清理干净搅拌机，防止交叉料污染，在共挤过程各区温度为：1区、215℃；2区、220℃；3区、230℃；4区、240℃；5区、250℃；挤出机、255℃；模口、255℃。
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