CN108034095A - Aviation insulated cable sheath and preparation method thereof - Google Patents
Aviation insulated cable sheath and preparation method thereof Download PDFInfo
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- CN108034095A CN108034095A CN201810034804.1A CN201810034804A CN108034095A CN 108034095 A CN108034095 A CN 108034095A CN 201810034804 A CN201810034804 A CN 201810034804A CN 108034095 A CN108034095 A CN 108034095A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to field of cables, discloses a kind of aviation insulated cable sheath and preparation method thereof, the preparation method includes：Heat filling, organic acid and coupling agent are added in solvent and are uniformly dispersed, then dries, collection gained powder M complete to solvent volatilization；Powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl-silicone oil, carbon black, zinc oxide and barium stearate are mixed, obtain closing refining glue after mixing；Will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming, obtain aviation insulated cable sheath；Solve heat filling to be easy to reunite in macromolecule matrix, deposit and bad dispersibility, ultimately result in the mechanical properties decrease of resin cured matter, it is impossible to the problem of meeting the use technological requirement of sheath.
Description
Technical field
The present invention relates to cable machinery, and in particular, to a kind of aviation insulated cable sheath and preparation method thereof.
Background technology
The sheath of electric wire is adiabatic mostly, this causes cable cover(ing) while insulation performance is provided, certain journey
Scattering and disappearing for electric wire internal heat is hindered on degree, the aggregation of heat can accelerate the aging speed of sheath, so as to shorten electric wire
The service life of cable.Add heat filling in sheath raw material to solve the above problems very well, still, heat filling is in macromolecule
It is easy to reunite in matrix, deposits and bad dispersibility, ultimately results in the mechanical properties decrease of resin cured matter, it is impossible to meet sheath
Use technological requirement.
Therefore it provides a kind of be provided simultaneously with excellent mechanical property and aviation insulated cable sheath and its system of heat dissipation performance
The problem of Preparation Method is urgent need to resolve of the present invention.
The content of the invention
The object of the present invention is to provide a kind of aviation insulated cable sheath and preparation method thereof, solve heat filling and exist
It is easy to reunite in macromolecule matrix, deposits and bad dispersibility, ultimately results in the mechanical properties decrease of resin cured matter, it is impossible to meet
The problem of use technological requirement of sheath.
To achieve these goals, the preparation method the present invention provides a kind of aviation with insulated cable sheath, the system
Preparation Method includes：
(1) heat filling, organic acid and coupling agent are added in solvent and are uniformly dispersed, then dried to solvent and be evaporated completely
Entirely, gained powder M is collected；
(2) by powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl-silicone oil, carbon black,
Zinc oxide and barium stearate mixing, obtain closing refining glue after mixing；
(3) will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming, obtain aviation insulated cable sheath；
Wherein, extruding the condition of vulcanization includes：The temperature of head is 65-80 DEG C, and the temperature of machine barrel extruding zone is 50-65 DEG C, machine barrel modeling
The temperature for changing section is 60-75 DEG C, and the temperature of screw rod is 40-50 DEG C.
Present invention also offers a kind of aviation insulated cable sheath, and the aviation is with insulated cable sheath by above-mentioned system
Preparation Method is made.
Through the above technical solutions, the present invention provides a kind of aviation insulated cable sheath and preparation method thereof, it is described
Preparation method includes：Heat filling, organic acid and coupling agent are added in solvent and are uniformly dispersed, then dries to solvent and is evaporated completely
Entirely, gained powder M is collected；By powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl silicon
Oil, carbon black, zinc oxide and barium stearate mixing, obtain closing refining glue after mixing；Refining glue will be closed to add in vulcanizer, extruded vulcanization
With it is hot-forming, obtain aviation insulated cable sheath；Wherein, extruding the condition of vulcanization includes：The temperature of head is 65-80
DEG C, the temperature of machine barrel extruding zone is 50-65 DEG C, and the temperature of machine barrel fluxing zone is 60-75 DEG C, and the temperature of screw rod is 40-50 DEG C；It is logical
Cross the synergistic effect between each raw material so that obtained aviation insulated cable sheath possesses excellent mechanical property and thermal diffusivity
Can, while the method for preparing the aviation insulated cable sheath is simple, raw material is easy to get.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Embodiment
The embodiment of the present invention is described in detail below.It is it should be appreciated that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The endpoint of disclosed scope and any value are not limited to the accurate scope or value herein, these scopes or
Value should be understood to comprising the value close to these scopes or value.For number range, between the endpoint value of each scope, respectively
It can be combined with each other between the endpoint value of a scope and single point value, and individually between point value and obtain one or more
New number range, these number ranges should be considered as specific open herein.
A kind of preparation method the present invention provides aviation with insulated cable sheath, the preparation method include：
(1) heat filling, organic acid and coupling agent are added in solvent and are uniformly dispersed, then dried to solvent and be evaporated completely
Entirely, gained powder M is collected；
(2) by powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl-silicone oil, carbon black,
Zinc oxide and barium stearate mixing, obtain closing refining glue after mixing；
(4) will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming, obtain aviation insulated cable sheath；
Wherein, extruding the condition of vulcanization includes：The temperature of head is 65-80 DEG C, and the temperature of machine barrel extruding zone is 50-65 DEG C, machine barrel modeling
The temperature for changing section is 60-75 DEG C, and the temperature of screw rod is 40-50 DEG C.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, relative to the heat filling of 100 parts by weight, the dosage of organic acid is 500-600 parts by weight, even
The dosage for joining agent is 8-15 parts by weight；
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, relative to the butadiene-styrene rubber of 100 parts by weight, the dosage of powder M is 20-30 parts by weight, ancient horse
The dosage of grand resin is 2-8 parts by weight, and the dosage of Kynoar is 2-6 parts by weight, and the dosage of benzoyl peroxide is 3-7 weights
Part is measured, the dosage of methyl-silicone oil is 1-10 parts by weight, and the dosage of carbon black is 1-4 parts by weight, and the dosage of zinc oxide is 1-4 weight
Part, the dosage of barium stearate is 2-6 parts by weight.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, heat filling be selected from carborundum, boron carbide, aluminium nitride, boron nitride, aluminium oxide, magnesia and
One or more in boron oxide.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, organic acid be selected from laurate and/or stearic acid.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, coupling agent be selected from silane coupling agent KH560, silane coupling agent KH792 and silane coupling agent
One or more in KH570.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, in step (2), the condition of mixing includes：Temperature is 60-90 DEG C, time 30-60min.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, in step (3), hot-forming condition includes：Hot-forming temperature is 60-80 DEG C,
Hot-forming pressure is 20-40MPa.
In a kind of preferred embodiment of the present invention, in order to further increase obtained aviation insulated cable sheath
Mechanical property and heat dissipation performance, the weight average molecular weight of Kynoar is 6000-9000；And/or
The average grain diameter of carbon black is 20-40mm.
The present invention provides a kind of aviation insulated cable sheath, and the aviation is with insulated cable sheath by above-mentioned preparation
Method is made.
The present invention will be described in detail by way of examples below.In following embodiments, Kynoar is divided equally again
Son amount is 6000-9000；The average grain diameter of carbon black is 20-40mm.In following embodiments, thermal conductivity factor is according to ASTM C 518-
10 standards are measured, and pliability is detected according to GB1731.
Embodiment 1
Carborundum, laurate and silane coupling agent KH560 are added in solvent and are uniformly dispersed, then dries to solvent and volatilizees
Completely, gained powder M is collected；By powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl silicon
Oil, carbon black, zinc oxide and barium stearate mixing, (condition of mixing includes for mixing：Temperature is 60 DEG C, time 30min) after
To conjunction refining glue；Will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming (hot-forming temperature be 60 DEG C, hot pressing
Molding pressure is 20MPa), obtain aviation insulated cable sheath；Wherein, extruding the condition of vulcanization includes：The temperature of head
For 65 DEG C, the temperature of machine barrel extruding zone is 50 DEG C, and the temperature of machine barrel fluxing zone is 60 DEG C, and the temperature of screw rod is 40 DEG C.Relative to
The heat filling of 100g, the dosage of organic acid is 500g, and the dosage of coupling agent is 8g；Relative to the butadiene-styrene rubber of 100g, powder M
Dosage be 20g, the dosage of coumarone indene resin is 2g, and the dosage of Kynoar is 2g, and the dosage of benzoyl peroxide is 3g,
The dosage of methyl-silicone oil is 1g, and the dosage of carbon black is 1g, and the dosage of zinc oxide is 1g, and the dosage of barium stearate is 2g.Test knot
In fruit, thermal conductivity factor is 0.34W/ (mK), pliability 0.52mm.
Embodiment 2
Boron carbide, stearic acid and silane coupling agent KH792 are added in solvent and are uniformly dispersed, then dries to solvent and volatilizees
Completely, gained powder M is collected；By powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl silicon
Oil, carbon black, zinc oxide and barium stearate mixing, (condition of mixing includes for mixing：Temperature is 90 DEG C, time 60min) after
To conjunction refining glue；Will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming (hot-forming temperature be 80 DEG C, hot pressing
Molding pressure is 40MPa), obtain aviation insulated cable sheath；Wherein, extruding the condition of vulcanization includes：The temperature of head
For 80 DEG C, the temperature of machine barrel extruding zone is 65 DEG C, and the temperature of machine barrel fluxing zone is 75 DEG C, and the temperature of screw rod is 50 DEG C.Relative to
The heat filling of 100g, the dosage of organic acid is 600g, and the dosage of coupling agent is 15g；Relative to the butadiene-styrene rubber of 100g, powder
The dosage of M is 30g, and the dosage of coumarone indene resin is 8g, and the dosage of Kynoar is 6g, and the dosage of benzoyl peroxide is
7g, the dosage of methyl-silicone oil is 10g, and the dosage of carbon black is 4g, and the dosage of zinc oxide is 4g, and the dosage of barium stearate is 6g.Survey
In test result, thermal conductivity factor is 0.31W/ (mK), pliability 0.44mm.
Embodiment 3
Boron nitride, laurate and silane coupling agent KH570 are added in solvent and are uniformly dispersed, then dries to solvent and volatilizees
Completely, gained powder M is collected；By powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl silicon
Oil, carbon black, zinc oxide and barium stearate mixing, (condition of mixing includes for mixing：Temperature is 75 DEG C, time 45min) after
To conjunction refining glue；Will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming (hot-forming temperature be 70 DEG C, hot pressing
Molding pressure is 30MPa), obtain aviation insulated cable sheath；Wherein, extruding the condition of vulcanization includes：The temperature of head
For 70 DEG C, the temperature of machine barrel extruding zone is 55 DEG C, and the temperature of machine barrel fluxing zone is 70 DEG C, and the temperature of screw rod is 45 DEG C.Relative to
The heat filling of 100g, the dosage of organic acid is 550g, and the dosage of coupling agent is 10g；Relative to the butadiene-styrene rubber of 100g, powder
The dosage of M is 25g, and the dosage of coumarone indene resin is 5g, and the dosage of Kynoar is 4g, and the dosage of benzoyl peroxide is
5g, the dosage of methyl-silicone oil is 6g, and the dosage of carbon black is 3g, and the dosage of zinc oxide is 3g, and the dosage of barium stearate is 4g.Test
As a result in, thermal conductivity factor is 0.32W/ (mK), pliability 0.41mm.
Embodiment 4
Carried out according to the method for embodiment 3, unlike, relative to the heat filling of 100g, the dosage of organic acid is
400g, the dosage of coupling agent is 5g；Relative to the butadiene-styrene rubber of 100g, the dosage of powder M is 15g, the dosage of coumarone indene resin
For 1g, the dosage of Kynoar is 1g, and the dosage of benzoyl peroxide is 2g, and the dosage of methyl-silicone oil is 0.5g, carbon black
Dosage is 0.5g, and the dosage of zinc oxide is 0.5g, and the dosage of barium stearate is 1g.In test result, thermal conductivity factor 0.32W/
(mK), pliability 0.31mm.
Embodiment 5
Carried out according to the method for embodiment 3, unlike, relative to the heat filling of 100g, the dosage of organic acid is
700g, the dosage of coupling agent is 18g；Relative to the butadiene-styrene rubber of 100g, the dosage of powder M is 35g, the dosage of coumarone indene resin
For 10g, the dosage of Kynoar is 8g, and the dosage of benzoyl peroxide is 10g, and the dosage of methyl-silicone oil is 12g, carbon black
Dosage is 6g, and the dosage of zinc oxide is 6g, and the dosage of barium stearate is 8g.In test result, thermal conductivity factor is 0.34W/ (m
K), pliability 0.33mm.
Comparative example 1
Carried out according to the method for embodiment 3, unlike, coumarone indene resin is not included in raw material；In test result, heat conduction
Coefficient is 0.24W/ (mK), pliability 0.27mm.
Comparative example 2
Carried out according to the method for embodiment 3, unlike, benzoyl peroxide is not included in raw material；In test result, lead
Hot coefficient is 0.27W/ (mK), pliability 0.28mm.
Comparative example 3
Carried out according to the method for embodiment 3, unlike, extruding the condition of vulcanization includes：The temperature of head is 60 DEG C, machine
The temperature of cylinder extruding zone is 55 DEG C, and the temperature of machine barrel fluxing zone is 55 DEG C, and the temperature of screw rod is 35 DEG C；In test result, heat conduction
Coefficient is 0.22W/ (mK), pliability 0.22mm.
Comparative example 4
Carried out according to the method for embodiment 3, unlike, extruding the condition of vulcanization includes：The temperature of head is 85 DEG C, machine
The temperature of cylinder extruding zone is 70 DEG C, and the temperature of machine barrel fluxing zone is 80 DEG C, and the temperature of screw rod is 55 DEG C；In test result, heat conduction
Coefficient is 0.25W/ (mK), pliability 0.23mm.
The preferred embodiment of the present invention described in detail above, still, during present invention is not limited to the embodiments described above
Detail, in the range of the technology design of the present invention, a variety of simple variants can be carried out to technical scheme, this
A little simple variants belong to protection scope of the present invention.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of aviation preparation method of insulated cable sheath, it is characterised in that the preparation method includes：
(1) heat filling, organic acid and coupling agent are added in solvent and are uniformly dispersed, then dry, receipts complete to solvent volatilization
Collection gained powder M；
(2) by powder M, butadiene-styrene rubber, coumarone indene resin, Kynoar, benzoyl peroxide, methyl-silicone oil, carbon black, oxidation
Zinc and barium stearate mixing, obtain closing refining glue after mixing；
(3) will close refining glue add vulcanizer in, it is extruded vulcanization and it is hot-forming, obtain aviation insulated cable sheath；Wherein,
The condition of extrusion vulcanization includes：The temperature of head is 65-80 DEG C, and the temperature of machine barrel extruding zone is 50-65 DEG C, machine barrel fluxing zone
Temperature is 60-75 DEG C, and the temperature of screw rod is 40-50 DEG C.
2. preparation method according to claim 1, wherein, relative to the heat filling of 100 parts by weight, the dosage of organic acid
For 500-600 parts by weight, the dosage of coupling agent is 8-15 parts by weight.
3. preparation method according to claim 1, wherein, relative to the butadiene-styrene rubber of 100 parts by weight, the dosage of powder M
For 20-30 parts by weight, the dosage of coumarone indene resin is 2-8 parts by weight, and the dosage of Kynoar is 2-6 parts by weight, peroxidating
The dosage of benzoyl is 3-7 parts by weight, and the dosage of methyl-silicone oil is 1-10 parts by weight, and the dosage of carbon black is 1-4 parts by weight, oxidation
The dosage of zinc is 1-4 parts by weight, and the dosage of barium stearate is 2-6 parts by weight.
4. preparation method according to claim 1, wherein, heat filling is selected from carborundum, boron carbide, aluminium nitride, nitridation
One or more in boron, aluminium oxide, magnesia and boron oxide.
5. preparation method according to claim 1, wherein, organic acid is selected from laurate and/or stearic acid.
6. preparation method according to claim 1, wherein, coupling agent is selected from silane coupling agent KH560, silane coupling agent
One or more in KH792 and silane coupling agent KH570.
7. preparation method according to claim 1, wherein, in step (2), the condition of mixing includes：Temperature is 60-90
DEG C, time 30-60min.
8. preparation method according to claim 1, wherein, in step (3), hot-forming condition includes：It is hot pressed into
The temperature of type is 60-80 DEG C, and hot-forming pressure is 20-40MPa.
9. preparation method according to claim 1, wherein, the weight average molecular weight of Kynoar is 6000-9000；With/
Or
The average grain diameter of carbon black is 20-40mm.
10. a kind of aviation insulated cable sheath, it is characterised in that the aviation is with insulated cable sheath by claim 1-7
Preparation method described in middle any one is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034804.1A CN108034095A (en) | 2018-01-15 | 2018-01-15 | Aviation insulated cable sheath and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034804.1A CN108034095A (en) | 2018-01-15 | 2018-01-15 | Aviation insulated cable sheath and preparation method thereof |
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ID=62096619
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504358A (en) * | 2011-11-22 | 2012-06-20 | 广东石油化工学院 | High-heat-conductivity rubber composite material and preparation method thereof |
| CN102660213A (en) * | 2012-06-08 | 2012-09-12 | 焦作市卓立烫印材料有限公司 | Surface treatment method of heat-conducting filler for epoxy heat-conducting adhesive |
| CN104893307A (en) * | 2015-05-26 | 2015-09-09 | 西南科技大学 | Heat-conduction electric-insulation rubber-plastic composite material and preparation method thereof |
| CN107501644A (en) * | 2017-09-29 | 2017-12-22 | 广东石油化工学院 | A kind of preparation method of heat-conducting type abrasion-resistant rubber |
-
2018
- 2018-01-15 CN CN201810034804.1A patent/CN108034095A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504358A (en) * | 2011-11-22 | 2012-06-20 | 广东石油化工学院 | High-heat-conductivity rubber composite material and preparation method thereof |
| CN102660213A (en) * | 2012-06-08 | 2012-09-12 | 焦作市卓立烫印材料有限公司 | Surface treatment method of heat-conducting filler for epoxy heat-conducting adhesive |
| CN104893307A (en) * | 2015-05-26 | 2015-09-09 | 西南科技大学 | Heat-conduction electric-insulation rubber-plastic composite material and preparation method thereof |
| CN107501644A (en) * | 2017-09-29 | 2017-12-22 | 广东石油化工学院 | A kind of preparation method of heat-conducting type abrasion-resistant rubber |
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Application publication date: 20180515 |