CN102590967B - Leading-in optical cable - Google Patents

Leading-in optical cable Download PDF

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Publication number
CN102590967B
CN102590967B CN 201210103168 CN201210103168A CN102590967B CN 102590967 B CN102590967 B CN 102590967B CN 201210103168 CN201210103168 CN 201210103168 CN 201210103168 A CN201210103168 A CN 201210103168A CN 102590967 B CN102590967 B CN 102590967B
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intensive aspect
leading
stiffener
cable
tight
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CN102590967A (en
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沈群华
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Suzhou shengxin Optic-Electric Technology Co., Ltd.
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Changshu Guleite Machinery Product Design Co Ltd
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Abstract

The invention belongs to the technical field of cables, and in particular relates to a leading-in optical cable. The leading-in optical cable is characterized by consisting of a tight-buffered optical fiber, a reinforcing body parallel to the axis of the tight-buffered optical fiber and wrapped on the tight-buffered optical fiber, and a jacket extruded on the reinforcing body, wherein the tight-buffered optical fiber consists of at least one uncolored optical fiber, a cured layer cured outside the uncolored optical fiber and a tight-buffered layer wrapped outside the cured layer; the uncolored optical fiber consists of a fiber core, a cladding wrapped on the fiber core, and a coating wrapped on the cladding; the length of the tight-buffered layer peeled from the cured layer is not less than 100 millimeters by adopting a [1N, 3N] peeling force; and the drawing force for drawing 100 millimeters of jacket from the reinforcing body is in a range of [0.2N, 15N]. The invention has the advantages that the leading-in optical cable is easy to manufacture and realize industrialization and batch production, has excellent mechanical performance, environmental performance, adhesive performance, bending resistance and torsion resistance, and can be applied indoors and outdoors.

Description

A kind of leading in cable
Technical field
The invention belongs to technical field of cables, especially relate to a kind of leading in cable.
Background technology
Along with the develop rapidly of infotech, the demand of optical cable grows with each passing day, from the birth of first optical fiber up till now, within the time of short decades, the transworld all angles of optical-fiber network.In recent years, people are constantly soaring for the wider demand in broadband, and with regard to domestic, existing many operators have carried out free speed-raising for the user.Believe, in the near future, optical fiber finally can enter every household.Domestic optical cable for entering the user is called leading in cable, the rower YD/1997-2009 butterfly leading in cable that present existing standard is the communications industry, this optical cable is put into sheath with optical fiber, reinforcement is placed in upper and lower both sides at optical fiber, then sheath coats optical fiber, reinforcement, has tearing port on the sheath of the arranged on left and right sides of optical fiber.Although this optical cable is simple in structure, a large amount of problems has appearred in construction, caused a large amount of complaints of user, main cause is: the stress-bearing capability of optical cable is too poor, too be simple and easy to cause the unknown cause fracture of optical fiber for the protection of optical fiber.For this reason, expect in industry the product of update to occur to satisfy the growing broadband demand of people.
In addition, although the inside cable of YD/T 1258 inside cables series regulations is arranged in prior art,, in actual applications, be difficult to apply it to outdoor, use as leading in cable; Main cause is too loose between tight tube fiber and reinforcement, and too loose between sheath and reinforcement, makes the mechanical property of optical cable, temperature performance is not good enough, makes when short section construction, and after stripping fiber optic cables, reinforcement and tight tube fiber slip away from sheath.
Summary of the invention
In order to address the above problem, the invention provides a kind of leading in cable, it is realized by the following technical solutions:
A kind of leading in cable is characterized in that it is to parallel and be coated on the intensive aspect 2 on tight tube fiber by tight tube fiber 1, with the tight tube fiber axle and the sheath 3 that is extruded on intensive aspect consists of; Described tight tube fiber is fine by at least one basic coloured light, be solidificated in the outer cured layer 14 of true qualities optical fiber and be coated on the outer tight sleeve layer 15 of cured layer and consist of; Described true qualities optical fiber by fibre core 11, be coated on the covering 12 on fibre core, the coat 13 that is coated on covering consists of.
Leading in cable described above is characterized in that described intensive aspect is one or more, in the time of many, is arranged in order outside the tight tube fiber circumference and distributes symmetrically; And has water blocking yarn 4 between adjacent intensive aspect.
Leading in cable described above, when it is characterized in that described true qualities optical fiber is one, cured layer is the ultra-violet curing dyed layer; When described true qualities optical fiber was many, cured layer was the ultraviolet-curing resin layer.
Any one leading in cable described above, the length that it is characterized in that in the peeling force that adopts [1N, 3N], tight sleeve layer being peeled away from cured layer is for being not less than 100mm.
A kind of leading in cable is characterized in that it is to parallel and be coated on the intensive aspect 2 on cured layer by cured layer 14, with the cured layer axle and the sheath 3 that is extruded on intensive aspect consists of; Described cured layer is tubular structure, and has at least one optical fiber in pipe; Described optical fiber by fibre core 11, be coated on covering 12 on fibre core, be coated on that coat 13 on covering consists of or by fibre core 11, be coated on covering 12 on fibre core, be coated on the coat 13 on covering and be solidificated in the outer dyed layer of coat and consist of.
Leading in cable described above is characterized in that described cured layer is polybutylene terephthalate or polypropylene.
Any one leading in cable described above is characterized in that described intensive aspect by stiffener 21 and is coated on the outer bonding coat 22 of stiffener consisting of; Bonding coat is lived the stiffener integral coating.
Any one leading in cable described above is characterized in that the xsect of described stiffener is circular or oval or fan annular or rectangle.
Any one leading in cable described above is characterized in that described intensive aspect is cylindrical or cuboid or fan annulated column shape.
Any one leading in cable described above is characterized in that described intensive aspect is made of stiffener 21 and the bonding coat 22 that is bonded in the stiffener surface; Be bonded in the stiffener upper surface for upper tack coat 221, be bonded in the stiffener lower surface for lower tack coat 222.
Any one leading in cable described above is characterized in that described upper tack coat is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene; Described lower tack coat is Polyvinylchloride.
Any one leading in cable described above is characterized in that described intensive aspect is cuboid; Described stiffener is also cuboid; On arbitrary xsect, the length of stiffener equals the length of intensive aspect.
Any one leading in cable described above is characterized in that described stiffener is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape.
Any one leading in cable described above is characterized in that described sheath is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene.
Any one leading in cable described above is characterized in that described tight sleeve layer is Polyvinylchloride.
Any one leading in cable described above is characterized in that it is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
In the present invention's one class embodiment, bonding coat outside it consists of intensive aspect by stiffener and integral coating, when sheath and tight sleeve layer all are Polyvinylchloride, bonding coat is also Polyvinylchloride, when producing, only need first intensive aspect to be carried out suitable preheating, when extruding sheath, the bonding coat of intensive aspect just closely sticks into sheath, tight sleeve layer and is structure as a whole, and makes like this optical cable have superior mechanical property, environmental performance, adhesive property, counter-bending, anti-torsion performance; Guaranteed simultaneously the stripping performance of optical cable and the performance of short section construction, made optical cable can be applicable to indoor and outdoors.
In the another kind of embodiment of the present invention, intensive aspect is made of the bonding coat of stiffener and upper and lower bonding, and described upper tack coat has identical material with sheath; Lower tack coat is Polyvinylchloride, and is identical with the tight sleeve layer material; When producing, only need first intensive aspect to be carried out suitable preheating, when extruding sheath, the bonding coat of intensive aspect just closely sticks into sheath, tight sleeve layer and is structure as a whole, and makes like this optical cable have superior mechanical property, environmental performance, adhesive property, counter-bending, anti-torsion performance; Guaranteed simultaneously the stripping performance of optical cable and the performance of short section construction, made optical cable can be applicable to indoor and outdoors.
And, because the stiffener in intensive aspect is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape, therefore strengthened widely the intensity of optical cable, make optical cable tensile stronger.
Intensive aspect is coated on outside tight tube fiber or cured layer, and is more effective to the protection of optical fiber, reduced widely the improper fracture of optical fiber.
The present invention has following main beneficial effect: make simple, easily industrialization, easily batch production, mechanical property, environmental performance, adhesive property, counter-bending, the anti-torsion performance is more superior, can be applicable to indoor and outdoors.
Description of drawings
Fig. 1 is the perspective view after a section of the invention process example 1 is opened stripping;
Fig. 2 is the part front view after Fig. 1 amplifies;
Fig. 3 is a kind of perspective view of the intensive aspect of use in embodiment 1;
Fig. 4 is the another kind of perspective view of the intensive aspect of use in embodiment 1;
Fig. 5 is the part front view of embodiment 2;
Fig. 6 is a kind of perspective view of the intensive aspect of use in the invention process example 3;
Fig. 7 is the front view that Fig. 6 amplifies;
Fig. 8 is the perspective view after a section of the invention process example 3 is opened stripping;
Fig. 9 is the perspective view after a section of the invention process example 4 is opened stripping;
Figure 10 is a kind of perspective view of the intensive aspect of use in the invention process example 5;
The front view of Figure 11 for amplifying for Figure 10;
Figure 12 is the perspective view after a section of the invention process example 5 is opened stripping;
The front view of Figure 13 for amplifying for Figure 12;
Figure 14 is the perspective view after a section of the invention process example 6 is opened stripping;
The front view of Figure 15 for amplifying for Figure 14;
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Embodiment 1
Ask for an interview Fig. 1 to Fig. 4, a kind of leading in cable is characterized in that it is to parallel and be coated on the intensive aspect 2 on tight tube fiber by tight tube fiber 1, with the tight tube fiber axle and the sheath 3 that is extruded on intensive aspect consists of; Described tight tube fiber is fine by a basic coloured light, be solidificated in the outer cured layer 14 of true qualities optical fiber and be coated on the outer tight sleeve layer 15 of cured layer and consist of; Described true qualities optical fiber by fibre core 11, be coated on the covering 12 on fibre core, the coat 13 that is coated on covering consists of; Described intensive aspect is the six roots of sensation and is arranged in order outside the tight tube fiber circumference and distributes symmetrically; Cured layer is the ultra-violet curing dyed layer; The length of tight sleeve layer being peeled away from cured layer in the peeling force that adopts [1N, 3N] is for being not less than 100mm; Intensive aspect is by stiffener 21 and be coated on the outer bonding coat 22 of stiffener and consist of; Bonding coat is lived the stiffener integral coating; The xsect of stiffener is the fan annular; Intensive aspect is fan annulated column shape; Described tight sleeve layer is Polyvinylchloride; Described stiffener is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape; Described sheath is Polyvinylchloride; Bonding coat is Polyvinylchloride; It is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
Certainly, leading in cable described above is characterized in that the xsect of described stiffener also can be circle or ellipse or rectangle.
Certainly, leading in cable described above is characterized in that described intensive aspect is cylindrical or cuboid.
Embodiment 2
Ask for an interview Fig. 5, and referring to figs. 1 to Fig. 4, a kind of leading in cable, substantially with embodiment 1, difference is to have water blocking yarn 4 between adjacent intensive aspect.
Embodiment 3
Ask for an interview Fig. 6 to Fig. 8, a kind of leading in cable is characterized in that it is to parallel and be coated on the intensive aspect 2 on tight tube fiber by tight tube fiber 1, with the tight tube fiber axle and the sheath 3 that is extruded on intensive aspect consists of; Described tight tube fiber is fine by a basic coloured light, be solidificated in the outer cured layer 14 of true qualities optical fiber and be coated on the outer tight sleeve layer 15 of cured layer and consist of; Described true qualities optical fiber by fibre core 11, be coated on the covering 12 on fibre core, the coat 13 that is coated on covering consists of; Described intensive aspect is one and is coated on outside the tight tube fiber circumference; Cured layer is the ultra-violet curing dyed layer; The length of tight sleeve layer being peeled away from cured layer in the peeling force that adopts [1N, 3N] is for being not less than 100mm; Intensive aspect is by stiffener 21 and be coated on the outer bonding coat 22 of stiffener and consist of; Bonding coat is lived the stiffener integral coating; The xsect of stiffener is rectangle; Intensive aspect is fan annulated column cuboid; It is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
Certainly, leading in cable described above is characterized in that the xsect of described stiffener also can be circle or oval or fan annular.
Certainly, leading in cable described above is characterized in that described intensive aspect is cylindrical or fan annulated column shape.
Certainly, leading in cable described above, described intensive aspect also can be many.
Embodiment 4
Ask for an interview Fig. 9, and with reference to figure 6 to Fig. 8, a kind of leading in cable, substantially with embodiment 3, difference is that described true qualities optical fiber is many, cured layer is the ultraviolet-curing resin layer.
In the invention process example 1 to 4, bonding coat outside it consists of intensive aspect by stiffener and integral coating, when sheath and tight sleeve layer all are Polyvinylchloride, bonding coat is also Polyvinylchloride, when producing, only need first intensive aspect to be carried out suitable preheating, when extruding sheath, the bonding coat of intensive aspect just closely sticks into sheath, tight sleeve layer and is structure as a whole, and makes like this optical cable have superior mechanical property, environmental performance, adhesive property, counter-bending, anti-torsion performance; Guaranteed simultaneously the stripping performance of optical cable and the performance of short section construction, made optical cable can be applicable to indoor and outdoors.
Embodiment 5
Ask for an interview Figure 10 to Figure 13 and referring to figs. 1 to Fig. 9, a kind of leading in cable, substantially with embodiment 4, difference is: described intensive aspect is made of stiffener 21 and the bonding coat 22 that is bonded in the stiffener surface; Be bonded in the stiffener upper surface for upper tack coat 221, be bonded in the stiffener lower surface for lower tack coat 222; Described upper tack coat is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene; Described lower tack coat is Polyvinylchloride; Described intensive aspect is cuboid; Described stiffener is also cuboid; On arbitrary xsect, the length of stiffener equals the length of intensive aspect.
Certainly, leading in cable described above is characterized in that described stiffener can be aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape.
Certainly, leading in cable described above is characterized in that described sheath can be low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene.
Embodiment 6
Ask for an interview Figure 14 and Figure 15, and referring to figs. 1 to Figure 13, a kind of leading in cable is characterized in that it is to parallel and be coated on the intensive aspect 2 on cured layer by cured layer 14, with the cured layer axle and the sheath 3 that is extruded on intensive aspect consists of; Described cured layer is tubular structure, and has at least one optical fiber in pipe; Described optical fiber by fibre core 11, be coated on covering 12 on fibre core, be coated on that coat 13 on covering consists of or by fibre core 11, be coated on covering 12 on fibre core, be coated on the coat 13 on covering and be solidificated in the outer dyed layer of coat and consist of; Draw to dissect schematic diagram, thus label 11,12,2 do not mark, but can be referring to figs. 1 to Figure 13; The length of tight sleeve layer being peeled away from cured layer in the peeling force that adopts [1N, 3N] is for being not less than 100mm; It is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
Leading in cable described above is characterized in that described cured layer is polybutylene terephthalate or polypropylene.
In the invention process example 5,6, intensive aspect is made of the bonding coat of stiffener and upper and lower bonding, and described upper tack coat has identical material with sheath; Lower tack coat is Polyvinylchloride, and is identical with the tight sleeve layer material; When producing, only need first intensive aspect to be carried out suitable preheating, when extruding sheath, the bonding coat of intensive aspect just closely sticks into sheath, tight sleeve layer and is structure as a whole, and makes like this optical cable have superior mechanical property, environmental performance, adhesive property, counter-bending, anti-torsion performance; Guaranteed simultaneously the stripping performance of optical cable and the performance of short section construction, made optical cable can be applicable to indoor and outdoors.
And, because the stiffener in intensive aspect is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape, therefore strengthened widely the intensity of optical cable, make optical cable tensile stronger.
Intensive aspect is coated on outside tight tube fiber or cured layer, and is more effective to the protection of optical fiber, reduced widely the improper fracture of optical fiber.
Certainly, in above-mentioned arbitrary embodiment, all can adopt Fig. 3, Fig. 4; Fig. 6, Fig. 7; And the intensive aspect in Figure 10, Figure 11.
Certainly, in above-mentioned arbitrary embodiment, true qualities optical fiber can be many, and many time, true qualities optical fiber is outer can also dyed layer.
Any one leading in cable described above is characterized in that described intensive aspect can be one or more, in the time of many, is arranged in order outside the tight tube fiber circumference and distributes symmetrically; And has water blocking yarn 4 between adjacent intensive aspect.
Any one leading in cable described above, when it is characterized in that described true qualities optical fiber is one, cured layer is the ultra-violet curing dyed layer; When described true qualities optical fiber was many, cured layer was the ultraviolet-curing resin layer.
Any one leading in cable described above, the length that it is characterized in that in the peeling force that adopts [1N, 3N], tight sleeve layer being peeled away from cured layer is for being not less than 100mm.
Any one leading in cable described above is characterized in that described intensive aspect by stiffener 21 and is coated on the outer bonding coat 22 of stiffener consisting of; Bonding coat is lived the stiffener integral coating.
Any one leading in cable described above is characterized in that the xsect of described stiffener is circular or oval or fan annular or rectangle.
Any one leading in cable described above is characterized in that described intensive aspect is cylindrical or cuboid or fan annulated column shape.
Any one leading in cable described above is characterized in that described intensive aspect is made of stiffener 21 and the bonding coat 22 that is bonded in the stiffener surface; Be bonded in the stiffener upper surface for upper tack coat 221, be bonded in the stiffener lower surface for lower tack coat 222.
Any one leading in cable described above is characterized in that described upper tack coat is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene; Described lower tack coat is Polyvinylchloride or the material identical with tight sleeve layer.
Any one leading in cable described above is characterized in that described intensive aspect is cuboid; Described stiffener is also cuboid; On arbitrary xsect, the length of stiffener equals the length of intensive aspect.
Any one leading in cable described above is characterized in that described stiffener is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape.
Any one leading in cable described above is characterized in that described sheath is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene.
Any one leading in cable described above is characterized in that described tight sleeve layer is Polyvinylchloride.
Any one leading in cable described above is characterized in that it is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
The present invention has following main beneficial effect: make simple, easily industrialization, easily batch production, mechanical property, environmental performance, adhesive property, counter-bending, the anti-torsion performance is more superior, can be applicable to indoor and outdoors.
The present invention is not limited to above-mentioned preferred forms, should be appreciated that design of the present invention can be by other various forms enforcement utilizations, and they drop in protection scope of the present invention equally.

Claims (9)

1. leading in cable is characterized in that it is to parallel and be coated on the intensive aspect on tight tube fiber by tight tube fiber, with the tight tube fiber axle and the sheath that is extruded on intensive aspect consists of; Described tight tube fiber is fine by at least one basic coloured light, be solidificated in the outer cured layer of true qualities optical fiber and be coated on the outer tight sleeve layer of cured layer and consist of; Described true qualities optical fiber by fibre core, be coated on the covering on fibre core, the coat that is coated on covering consists of; Described intensive aspect is by stiffener and be coated on the outer bonding coat of stiffener and consist of; Bonding coat is lived the stiffener integral coating; The length of tight sleeve layer being peeled away from cured layer in the peeling force that adopts [1N, 3N] is for being not less than 100mm; It is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
2. leading in cable according to claim 1, is characterized in that described intensive aspect is one or more, in the time of many, is arranged in order outside the tight tube fiber circumference and distributes symmetrically; And has water blocking yarn between adjacent intensive aspect.
3. according to claim 1 or leading in cable claimed in claim 2, when it is characterized in that described true qualities optical fiber is one, cured layer is the ultra-violet curing dyed layer; When described true qualities optical fiber was many, cured layer was the ultraviolet-curing resin layer.
4. the xsect that according to claim 1 or leading in cable claimed in claim 2, it is characterized in that described stiffener is circular or oval or fan annular or rectangle; Described intensive aspect is cylindrical or cuboid or fan annulated column shape.
5. leading in cable is characterized in that it is to parallel and be coated on the intensive aspect on tight tube fiber by tight tube fiber, with the tight tube fiber axle and the sheath that is extruded on intensive aspect consists of; Described tight tube fiber is fine by at least one basic coloured light, be solidificated in the outer cured layer of true qualities optical fiber and be coated on the outer tight sleeve layer of cured layer and consist of; Described true qualities optical fiber by fibre core, be coated on the covering on fibre core, the coat that is coated on covering consists of; Described intensive aspect is made of stiffener and the bonding coat that is bonded in the stiffener surface; Be bonded in the stiffener upper surface for upper tack coat, be bonded in the stiffener lower surface for lower tack coat; Described intensive aspect is cuboid; Described stiffener is also cuboid; On arbitrary xsect, the length of stiffener equals the length of intensive aspect; The length of tight sleeve layer being peeled away from cured layer in the peeling force that adopts [1N, 3N] is for being not less than 100mm; It is that the withdrawing power scope of 100mm is [0.2N, 15N] that sheath withdrawing from the intensive aspect is opened length.
6. leading in cable according to claim 5, is characterized in that described intensive aspect is one or more, in the time of many, is arranged in order outside the tight tube fiber circumference and distributes symmetrically; And has water blocking yarn between adjacent intensive aspect.
7. leading in cable according to claim 6, is characterized in that described upper tack coat is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene; Described lower tack coat is Polyvinylchloride or the material identical with tight sleeve layer.
8. according to claim 1 or claim 2 or claim 5 or any one leading in cable claimed in claim 6, it is characterized in that described stiffener is aramid yarn or glass fiber yarn or aluminium strip or steel band or glass fiber tape.
9. according to claim 1 or claim 2 or claim 5 or any one leading in cable claimed in claim 6, it is characterized in that described sheath is low-smoke non-halogen flame-retardant tygon or Polyvinylchloride or Low Density Polyethylene or medium density polyethylene or high density polyethylene; Described tight sleeve layer is Polyvinylchloride.
CN 201210103168 2012-04-07 2012-04-07 Leading-in optical cable Active CN102590967B (en)

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JP7198756B2 (en) 2016-12-23 2023-01-04 マジック リープ, インコーポレイテッド Microstructured fiber optic oscillators and waveguides for fiber scanners
CN109491031B (en) * 2018-12-20 2021-01-01 深圳长飞智连技术有限公司 Tight-buffered optical fiber and manufacturing method thereof

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CN101393310A (en) * 2008-11-05 2009-03-25 沈群华 Optical fibre band optical cable
CN101458379A (en) * 2008-12-30 2009-06-17 江苏永鼎股份有限公司 Tight-jacketed optical cable for 3G network baseband remote technology
CN101706605A (en) * 2009-11-11 2010-05-12 郑振卫 Central tube bundle optical cable with improved structure
CN101788706A (en) * 2010-03-19 2010-07-28 深圳市特发信息光网科技股份有限公司 Pressive bending resistance optical cable and manufacturing method thereof
CN202563133U (en) * 2012-04-07 2012-11-28 常熟市谷雷特机械产品设计有限公司 Introduced optical cable

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