CN103809257A - Optical cable GTL (Gas To Liquid) base oil filling paste and preparing method thereof - Google Patents
Optical cable GTL (Gas To Liquid) base oil filling paste and preparing method thereof Download PDFInfo
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- CN103809257A CN103809257A CN201310118461.4A CN201310118461A CN103809257A CN 103809257 A CN103809257 A CN 103809257A CN 201310118461 A CN201310118461 A CN 201310118461A CN 103809257 A CN103809257 A CN 103809257A
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Abstract
The invention discloses an optical cable GTL base oil filling paste. The optical cable GTL base oil filling paste is mainly composed of GTL base oil, oil decomposition inhibitor, thermoplastic synthetic rubber, antioxidant and thickener. The invention further discloses a preparing method of the optical fiber GTL base oil filling paste. The optical fiber GTL base oil filling paste has the advantages of being low in density, good in low-temperature performance and capable of being safely used as factice products for replacing synthetic oil in an environment of minus 50 DEG C, having good colloid stability, oxidation stability, heat resistance and weather resistance and being system-oil-decomposition-free in system and low in acid value; being high in thixotropic index, low in viscosity, strong in water-resistance, emulsification-free, good in high temperature drip, wide in environment temperature application range, and enabling an optical fiber to be always in a stress-free state inside a buffer tuber and a cable core to be always in a stress-free state inside a cable.
Description
Technical field
The present invention relates to a kind of filling paste and preparation method thereof, relate in particular to a kind of optical cable GTL base oil filling paste and preparation method thereof.
Background technology
Communication industry is basic industry and the mainstay industry of Chinese national economy, is to build national information infrastructure, and network and information service are provided, and supports strategic, the guiding industry of socio-economic development comprehensively.Eleventh Five-Year Plan period, Communication in China industry has obtained larger development, by actively developing 3G network construction and service application, carries forward vigorously TD-SCDMA industrialization and commercialization process, and industry entirety has kept the orderly development of healthy and stable.At present, the communications industry has become the Chaoyang enterprise of global various countries, and along with the develop rapidly of optical communication cause, the demand of optical cable grows with each passing day; Making rapid progress of optical communication industry brings great convenience to daily life, and daily life (mobile phone, computer, TV, network etc.) has be unable to do without optical communication; As everyone knows, optical communication is by optical cable transmission information, and the core material of optical cable is optical fiber, and the patron saint of optical fiber is ointment, that is to say that ointment is the servant of optical fiber, and the good no of ointment product quality will directly have influence on the transmission performance of optical cable.Optical fiber, under the effect of moisture content, moisture and stress, can produce stress corrosion, in ambient containing hydrogen, can produce hydrogen loss; Once being subject to stress, corrosion and hydrogen loss, optical fiber will greatly reduce the transmission performance of optical cable information, as time goes by, optical cable will be lost its information transmission performance gradually, the consequence that the generation of this phenomenon brings society is well imagined, list brings very big inconvenience to daily life and work, and nation-building also will be produced and be had a strong impact on.
In sum, the good no of ointment product quality will play vital effect to the quality of optical cable product, and the good no of ointment product quality is mainly to be decided by the quality of base oil; The good no of base oil quality will directly have influence on the quality of ointment product thus.
Along with the high request of optical cable quality and updating of cable configuration, the quality of ointment product can not meet the usability of present optical cable product and had filled requirement in the past; It is mainly reflected in processing characteristics (speed, thixotropy etc.), suitable environment (low temperature of ointment is required) and the optical cable new structure of optical cable.Along with the compactness of cable configuration, fiber number increases, and casing diameter such as dwindles at the technological improvement, and ointment filling paste product has been proposed to higher technical requirement.It is mainly reflected in density, low temperature, viscosity, cone penetration and thixotropic index aspect (abbreviation thixotropic paste); It is that filling paste density value is little that its key property requires, and can directly alleviate the own wt of optical cable, reduces optical cable cost, can also when built on stilts, alleviate self-supporting load forces for optical cable simultaneously.Thixotropic index value is wanted high (the solid-state skeleton of the fine cream of major embodiment under static state), versatility is wide, and (secondary coating pipe diameter can be general, need not change cream), high temperature drip is good, suitable environment wide (requirement of ointment high and low temperature environment), it can make optical fiber in loose sleeve pipe and cable core can be all the time in cable in unstress state the most freely.Microbending loss and the stress corrosion of optical fiber under stress, moisture content and moisture effect of optical fiber are so just reduced.When this fine cream is in the time being subject to stress (as carrying, the lifting etc. of optical cable), demonstrate the state that solid is the same and optical fiber is fixed motionless; And when this stress during higher than a critical value (as by bending, make a dash hit etc.), filling paste will flow, viscosity declines rapidly, and like this, optical fiber almost can just discharge these suffered stress and without bending in being subject to stress.And, because the thermodynamics phase of this filling paste tendency is solid-state, so revert to high viscosity gradually again and optical fiber is fixed at the freely rear filling paste of optical fiber; Greatly improve the transmission quality of optical cable.
Therefore, how to develop a kind of usability that can meet present optical cable product is that those skilled in the art are devoted to one of direction of studying with filling the optical cable filling paste requiring always.
Summary of the invention
The object of the invention is to overcome the defect of prior art and a kind of optical cable GTL base oil filling paste is provided, can directly alleviate the own wt of optical cable, because ointment density is little, can directly reduce the ointment loading between unit volume cable sleeve and gap, reduce optical cable cost; Because ointment cryogenic property is good, can replace synthetic oil, can thoroughly solve safe handling and the protection question of optical cable under various natural environment and climate conditions, to guarantee the transmission performance of optical cable.
Another object of the present invention is to provide the preparation method of a kind of optical cable GTL base oil filling paste.
The object of the present invention is achieved like this:
The invention provides a kind of optical cable GTL base oil filling paste, comprise the component of following percentage by weight:
GTL base oil 70～90%;
Oil dividing inhibitor 5～15%;
Antioxidant 0.3～1%;
Thermoplastic synthetic rubber 5～12%;
Thickening agent 2～10%;
The percentage by weight sum of all components is 100%.
GTL base oil filling paste for above-mentioned a kind of optical cable, wherein, the GTL base oil that described GTL base oil selects Shell Co. Ltd to produce, described oil dividing inhibitor is selected polyisobutylene or polybutylene; Described antioxidant is selected high-temp liquid antioxidant; It is the high molecular polymer thermoplastic synthetic rubber of 35-40% that described thermoplastic synthetic rubber is selected styrene weight content; Described thickening agent is selected gas-phase silica.
The present invention also provides a kind of preparation method of above-mentioned optical cable GTL base oil filling paste, comprises the following steps:
Oil dividing inhibitor is joined in GTL base oil, and the uniform stirring 1～2 hour of heating, in the time that temperature rises to 60 ℃, add thermoplastic synthetic rubber, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, insulated and stirred, after 1～3 hour, adds antioxidant to stir 0.5-1 hour again, and then cooling down to 50 ℃～80 ℃, add thickening agent, fully feed back stirred after 1～3 hour, ground through homogeneous, vacuum outgas, obtains the final products of water white transparency shape colloid.
GTL base oil is take rock gas as the synthetic base oil of raw material.Because GTL base oil processes by rock gas is synthetic, so it is as clear as crystal as water, its molecular structure and common base oil have essential distinction, can really accomplish not sulfur-bearing and aromatic hydrocarbon, secondly its density is very little, and pour point is low, and viscosity index value is high, belong to III+ base oil, can replace synthetic oil to process different ointment products and make optical cable be applicable to various environment.Following table is that GTL base oil (being the technical solution adopted in the present invention), common III base oil, synthetic oil are every technical parameter of the filling paste that forms of base oil process:
As can be seen from the above table, the technical indicator of the filling paste that the filling paste that GTL base oil is produced and synthetic oil are produced is substantially approaching, and has very large difference with the ointment product that common III class oil is produced; Its key distinction aspect technical indicator is embodied in, outward appearance, dropping point, density, low temperature cone penetration, viscosity, acid number, colour stability, thixotropic index value.
The technical characteristic of GTL base oil filling paste of the present invention is applied and is had the following advantages on optical cable:
The outward appearance of A, GTL base oil filling paste of the present invention is more transparent than the outward appearance of the filling paste of other Oil Production, it is as clear as crystal as water, because it is synthesized to come by rock gas, molecular structure and common base oil have essential distinction, can really accomplish not sulfur-bearing and aromatic hydrocarbon.So all material of it and cable configuration all shows good compatibility (these materials comprise: optical fiber, loose shell material are as PBT, PA, PP, HDPE, PE etc.); Can guarantee the long-term safety operation under various natural environment and climate conditions of optical cable product.Simultaneously because GTL base oil filling paste transparency is high, convenient in optical cable construction continues work.
The dropping point of the filling paste that the dropping point of B, GTL base oil filling paste of the present invention is produced than other base oil is much higher, can compare favourably with synthetic oil (PAO), from upper table; But more than the low price half of the price synthetic oil (PAO) of GTL technical oil.The dropping point of ointment product is an index of reflection filling paste thermal behavior, refer to that ointment heats under defined terms, ointment raises and deliquescing or thawing with temperature, the height of ointment dropping point represents that ointment can bear the heating degree of environment temperature in use, and the higher environment temperature of bearing of ointment dropping point value is just higher.Simultaneously because ointment melting point is higher, can guarantee ointment in optical cable loose tube drip not in hot environment.The more severe optical cable environment of filling, particularly high and low temperature environment that GTL base oil filling paste of the present invention is more suitable for various optical cables thus.
The high low temperature cone penetration value of C, GTL base oil filling paste of the present invention is more many greatly than the cone penetration value of other ointment.The cone penetration value of filling paste is divided into normal temperature and low temperature, optical cable is mentioned to it is important.
1., normal temperature cone penetration, also can be described as optical cable fill process cone penetration, with regard to ointment product cone penetration itself value with regard to optical cable product without any meaning, it only represents the denseness amount (being soft or hard degree) of ointment, its measuring method is: at the temperature and load of regulation, the standard cone of penetration meter vertically sinks to the degree of depth of ointment sample within 5 seconds, is called cone penetration, take 1/10mm as unit.Cone penetration value is larger, denseness less (ointment is rarer), and vice versa.With regard to the technique of optical cable loose tube, the cone penetration value of ointment is more greatly more easily filled (ointment is rarer, good fluidity), can also add quick-release cover speed simultaneously; But the value of ointment cone penetration can not unconfinedly expand, because cone penetration value is larger, ointment is more easily analysed oil, and the high temperature drip of optical cable loose tube is also difficult to pass through simultaneously.This is conflicting index.Because the molecular structure of GTL base oil is different from other oil product, the structural framework quite stable of the ointment processing with it, also can not produce and analyse oil under 80 ℃, 24h environmental baseline even the cone penetration value of ointment is amplified to 5001/10mm, the optical cable loose tube that can also guarantee ￠ 4mm simultaneously drip not in 80 ℃ of environment.GTL base oil filling paste is more suitable for the filling of various optical cables thus, can also accelerate the speed of production of two covers simultaneously.
2., the low temperature cone penetration of GTL base oil filling paste of the present invention is more many greatly than the low temperature cone penetration of other filling paste, it can be compared with synthetic oil (PAO) U.S., from upper table.The minimum serviceability temperature of communications optical cable depends on environment for use and the system of laying of optical cable, the limit low temperature of commercial optical cable is generally-40 ℃, special occasions may be lower, as the limit low temperature of the aerial optical cable in forest zone, northern China Daxing'an Mountainrange can reach-55 ℃, the limit low temperature of military fiber optic cable is also-55 ℃.The optical cable using at low temperatures requires ointment under extremely low temperature, still can keep enough flexibilities, thereby makes optical fiber can obtain good mechanical damping protective effect, and if not, optical fiber will produce serious microbending loss in stiff ointment.Therefore, optical fiber filling paste must keep certain low temperature cone penetration value under ultimate temperature.The size of optical fiber filling paste low temperature cone penetration value almost depends on the proterties of base oil completely.The characteristic of GTL base oil is exactly that pour point is good, and viscosity index value is high, and it can guarantee communications optical cable safe transmission information in severe low temperature environment.
Acid number, the colour stability of D, GTL base oil filling paste of the present invention are little more many than the value of general ointment, from upper table.Acid number is the total content that represents ointment Free Acid, and acid number is larger, represents that the content of the free acid in ointment is larger, and it will produce corrosive attack to fibre coating and loose shell material.As time goes on, will have a strong impact on the transmission performance of communications optical cable.Optical fiber filling paste is meeting oxidation deterioration in long-term storage and use procedure, and acid number becomes large simultaneously, and this is mainly unstable generation of oxidation stability due to oil product, and it is mainly reflected in the colour stability aspect of ointment.The oil product of high-quality, its colour stability is quite stable, colour stability changing value is quite little.
The viscosity of the general ointment of viscosity ratio of E, GTL base oil filling paste of the present invention is little, from upper table.The viscosity number of ointment belongs to the process parameter value of optical cable loose tube, and its large young pathbreaker directly has influence on the fill process of loose sleeve pipe, and theoretically, the viscosity number of ointment is more little is more convenient to the filling of ointment and the control of excess fiber length in loose sleeve pipe.But the too small meeting of the viscosity of ointment causes optical cable high temperature drip, thus guarantee optical cable high temperature drip by the situation that try one's best a little bit smaller the viscosity number control of ointment product.
The density of the filling paste that all base oils of density ratio of F, GTL base oil filling paste of the present invention are produced all wants little many, from upper table, ointment density is little can be not only between cable sleeve and gap, to fill to save material, directly reduce optical cable financial cost, can also alleviate the own wt of optical cable, can also when built on stilts, alleviate self-supporting load forces for optical cable simultaneously.
GTL base oil filling paste of the present invention does not need heating in the time filling, and fills after optical cable and can play the effects such as good protection against the tide, waterproof, shockproof, buffering, anti-high and low-temp to optical cable, and oversheath in optical cable is had to good compatibility.This product processing technique is simple, versatility is wide, and Applicable temperature environment is wide, and production environment is clean, pollution-free, water resisting property is strong, and high temperature performance is good, and can meet the usability of present optical cable product completely and fill requirement, be novel Green Product.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
The oil dividing inhibitor of 100 weight portions is joined in the GTL base oil of 800 weight portions, heat uniform stirring 1～2 hour, in the time that temperature rises to 60 ℃, add the thermoplastic synthetic rubber of 65 weight portions, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, after insulated and stirred 1～3 hour, add the antioxidant of 5 weight portions to stir again 0.5-1 hour, and then cooling down to 50 ℃～80 ℃, add the thickening agent of 30 weight portions, fully feed back stirred after 1～3 hour, grind through homogeneous, vacuum outgas, the final products that finally obtain are water white transparency shape colloid.
In above-mentioned raw materials, the GTL base oil that GTL base oil selects Shell Co. Ltd to produce, it is PB1300 polyisobutylene product that oil dividing inhibitor is selected Daopu Chemical International Trade Co., Ltd., Shanghai, model, and thermoplastic synthetic rubber is selected from the product that Kraton company of the U.S., model are G1701; Antioxidant is selected the high-temp liquid antioxidant product that Ciba (China) company limited, model are L135, and gas-phase silica is selected the H20 product of German Wa Ke company.
These final products after testing leading indicator are: outward appearance (water white transparency); Density (20 ℃, 0.817g/cm
3); Thixotropic index value (13.5); Dropping point (230 ℃); Flash-point (230 ℃); Cone penetration (25 ℃, 1/10mm, 460;-40 ℃, 1/10mm, 330); Colour stability (130 ℃, 120h, 0.1); Oxidation induction period (190 ℃, > 60min); Liberation of hydrogen value (80 ℃, 24h, 0.003 μ l/g); Analyse oil (80 ℃, 24h, 0%); Evaporation capacity (80 ℃, 24h, 0.08%); Viscosity (25 ℃, D=50S
-1, 3986mpa.s); Water resisting property (20 ℃, 7d, do not disintegrate, not emulsification), acid number (0.06mgKOH/g); Water cut (nothing); High temperature drip (80 ℃, not drip); Good with all material compatibility.
Embodiment 2
The oil dividing inhibitor of 90 weight portions is joined in the GTL base oil of 800 weight portions, heat uniform stirring 1～2 hour, in the time that temperature rises to 60 ℃, add the thermoplastic synthetic rubber of 70 weight portions, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, after insulated and stirred 1～3 hour, add the antioxidant of 5 weight portions to stir again 0.5-1 hour, and then cooling down to 50 ℃～80 ℃, add the thickening agent of 35 weight portions, fully feed back stirred after 1～3 hour, grind through homogeneous, vacuum outgas, the final products that finally obtain are water white transparency shape colloid.
In above-mentioned raw materials, the GTL base oil that GTL base oil selects Shell Co. Ltd to produce, it is PB1300 polyisobutylene product that oil dividing inhibitor is selected Daopu Chemical International Trade Co., Ltd., Shanghai, model, and thermoplastic synthetic rubber is selected from the product that Kraton company of the U.S., model are G1701; Antioxidant is selected the high-temp liquid antioxidant product that Ciba (China) company limited, model are L135, and gas-phase silica is selected the H20 product of German Wa Ke company.
These final products after testing leading indicator are: outward appearance (water white transparency); Density (20 ℃, 0.818g/cm
3); Thixotropic index value (14.2); Dropping point (232 ℃); Flash-point (230 ℃); Cone penetration (25 ℃, 1/10mm, 457;-40 ℃, 1/10mm, 333); Colour stability (130 ℃, 120h, 0.1); Oxidation induction period (190 ℃, > 60min); Liberation of hydrogen value (80 ℃, 24h, 0.003 μ l/g); Analyse oil (80 ℃, 24h, 0%); Evaporation capacity (80 ℃, 24h, 0.08%); Viscosity (25 ℃, D=50S
-1, 3933mpa.s); Water resisting property (20 ℃, 7d, do not disintegrate, not emulsification), acid number (0.07mgKOH/g); Water cut (nothing); High temperature drip (80 ℃, not drip); Good with all material compatibility.
Embodiment 3
The oil dividing inhibitor of 95 weight portions is joined in the GTL base oil of 790 weight portions, heat uniform stirring 1～2 hour, in the time that temperature rises to 60 ℃, add the thermoplastic synthetic rubber of 70 weight portions, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, after insulated and stirred 1～3 hour, add the antioxidant of 5 weight portions to stir again 0.5-1 hour, and then cooling down to 50 ℃～80 ℃, add the thickening agent of 40 weight portions, fully feed back stirred after 1～3 hour, grind through homogeneous, vacuum outgas, the final products that finally obtain are water white transparency shape colloid.
In above-mentioned raw materials, the GTL base oil that GTL base oil selects Shell Co. Ltd to produce, it is PB2400 polyisobutylene product that oil dividing inhibitor is selected Daopu Chemical International Trade Co., Ltd., Shanghai, model, and thermoplastic synthetic rubber is selected from the product that Kraton company of the U.S., model are G1701; Antioxidant is selected the high-temp liquid antioxidant product that Ciba (China) company limited, model are L135, and gas-phase silica is selected the H20 product of German Wa Ke company.
These final products after testing leading indicator are: outward appearance (water white transparency); Density (20 ℃, 0.819g/cm
3); Thixotropic index value (13.2); Dropping point (230 ℃); Flash-point (230 ℃); Cone penetration (25 ℃, 1/10mm, 455;-40 ℃, 1/10mm, 325); Colour stability (130 ℃, 120h, 0.1); Oxidation induction period (190 ℃, > 60min); Liberation of hydrogen value (80 ℃, 24h, 0.003 μ l/g); Analyse oil (80 ℃, 24h, 0%); Evaporation capacity (80 ℃, 24h, 0.08%); Viscosity (25 ℃, D=50S
-1, 4103mpa.s); Water resisting property (20 ℃, 7d, do not disintegrate, not emulsification), acid number (0.06mgKOH/g); Water cut (nothing); High temperature drip (80 ℃, not drip); Good with all material compatibility.
Embodiment 4
The oil dividing inhibitor of 90 weight portions is joined in the GTL base oil of 810 weight portions, heat uniform stirring 1～2 hour, in the time that temperature rises to 60 ℃, add the thermoplastic synthetic rubber of 65 weight portions, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, after insulated and stirred 1～3 hour, add the antioxidant of 5 weight portions to stir again 0.5-1 hour, and then cooling down to 50 ℃～80 ℃, add the thickening agent of 30 weight portions, fully feed back stirred after 1～3 hour, grind through homogeneous, vacuum outgas, the final products that finally obtain are water white transparency shape colloid.
In above-mentioned raw materials, the GTL base oil that GTL base oil selects Shell Co. Ltd to produce, it is PB2400 polyisobutylene product that oil dividing inhibitor is selected Daopu Chemical International Trade Co., Ltd., Shanghai, model, and thermoplastic synthetic rubber is selected from the product that Kraton company of the U.S., model are G1701; Antioxidant is selected the high-temp liquid antioxidant product that Ciba (China) company limited, model are L135, and gas-phase silica is selected the H20 product of German Wa Ke company.
These final products after testing leading indicator are: outward appearance (water white transparency); Density (20 ℃, 0.817g/cm
3); Thixotropic index value (13.1); Dropping point (230 ℃); Flash-point (230 ℃); Cone penetration (25 ℃, 1/10mm, 463;-40 ℃, 1/10mm, 330); Colour stability (130 ℃, 120h, 0.1); Oxidation induction period (190 ℃, > 60min); Liberation of hydrogen value (80 ℃, 24h, 0.003 μ l/g); Analyse oil (80 ℃, 24h, 0%); Evaporation capacity (80 ℃, 24h, 0.08%); Viscosity (25 ℃, D=50S
-1, 3926mpa.s); Water resisting property (20 ℃, 7d, do not disintegrate, not emulsification), acid number (0.06mgKOH/g); Water cut (nothing); High temperature drip (80 ℃, not drip); Good with all material compatibility.
Above embodiment is used for illustrative purposes only, but not limitation of the present invention, person skilled in the relevant technique, without departing from the spirit and scope of the present invention, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present invention, should be limited by each claim.
Claims (7)
1. a GTL base oil filling paste for optical cable, is characterized in that, comprises the component of following percentage by weight:
GTL base oil 70～90%;
Oil dividing inhibitor 5～15%;
Antioxidant 0.3～1%;
Thermoplastic synthetic rubber 5～12%;
Thickening agent 2～10%;
The percentage by weight sum of all components is 100%.
2. GTL base oil filling paste for a kind of optical cable as claimed in claim 1, is characterized in that, described oil dividing inhibitor is polyisobutylene or polybutylene.
3. GTL base oil filling paste for a kind of optical cable as claimed in claim 1, is characterized in that, described antioxidant is high-temp liquid antioxidant.
4. GTL base oil filling paste for a kind of optical cable as claimed in claim 1, is characterized in that, described thermoplastic synthetic rubber is that styrene weight content is the high molecular polymer thermoplastic synthetic rubber of 35-40%.
5. GTL base oil filling paste for a kind of optical cable as claimed in claim 1, is characterized in that, described thickening agent is gas-phase silica.
6. a preparation method for GTL base oil filling paste for optical cable as claimed in claim 1, is characterized in that, comprises the following steps:
Oil dividing inhibitor is joined in GTL base oil, and the uniform stirring 1～2 hour of heating, in the time that temperature rises to 60 ℃, add thermoplastic synthetic rubber, continue to heat and stir 2～5 hours, treat that temperature rises to 160 ℃, stop heating, insulated and stirred, after 1～3 hour, adds antioxidant to stir 0.5-1 hour again, and then cooling down to 50 ℃～80 ℃, add thickening agent, fully feed back stirred after 1～3 hour, ground through homogeneous, vacuum outgas, obtains final products.
7. the preparation method of GTL base oil filling paste for a kind of optical cable as claimed in claim 6, is characterized in that, described final products are water white transparency shape colloid.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104900323A (en) * | 2015-04-03 | 2015-09-09 | 江苏南方通信科技有限公司 | Novel high-stability optical cable filling paste and preparation method thereof |
| CN111808431A (en) * | 2020-07-02 | 2020-10-23 | 上海鸿辉光通科技股份有限公司 | Optical fiber filling paste with ultralow loss to optical fiber and preparation method thereof |
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| US20030049002A1 (en) * | 1999-08-23 | 2003-03-13 | Claudio Bosisio | Optical fiber cable with components having improved compatibility with waterblocking filling compositions |
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| CN103809257B (en) | 2016-07-06 |
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