CN106751034A - A kind of automobile graphene composite material and preparation method thereof - Google Patents
A kind of automobile graphene composite material and preparation method thereof Download PDFInfo
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- CN106751034A CN106751034A CN201611242042.1A CN201611242042A CN106751034A CN 106751034 A CN106751034 A CN 106751034A CN 201611242042 A CN201611242042 A CN 201611242042A CN 106751034 A CN106751034 A CN 106751034A
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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Abstract
The invention discloses a kind of automobile graphene composite material and preparation method thereof, the composite is made up of according to mass percent meter following raw material：Graphene 2.2~2.9%, modified meerschaum powder 18~23%, ethylene propylene diene rubber 66~74%, fluoroether rubber 1.8~2.5%, castor oil acid barium 0.4~0.7%, lauryl sodium sulfate 0.3~0.6%, the tertiary butane 1.3~1.6% of peroxidating two, age resistor ODA 0.9~1.3%, antioxidant H 1.1~1.4%；The preparation of modified meerschaum powder：Sepiolite powder is broken into sepiolite powder, is dried, dried sepiolite powder is mixed with ether, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 82~90 DEG C, return time is 2~3h, separates solid, after drying.Heat conductivity of the present invention is high, can be used as Heat Conduction Material.
Description
Technical field
The present invention relates to materials used in auto manufacturing technical field, specifically a kind of automobile graphene composite material and its preparation side
Method.
Background technology
Graphene is a kind of emerging two-dimentional carbon nanomaterial, and it not only has the theoretical thermal conductivity factor of 5300w/m/k, also has
There is specific surface area and Young's modulus very high, these unique properties make Graphene be considered as a kind of efficient hot interface, thermal control
Material, but with Graphene as additive, graphene uniform is added to and all there is difficulty in many matrix materials, and it is abundant
The heat conductivility of Graphene is played, it is necessary to add more multi-component Graphene in matrix material, this undoubtedly also increases preparation
The cost of composite.
EP rubbers is the synthetic rubber with ethene, propylene as principal monomer, according to the difference of monomer composition in strand,
Have EPM and ethylene propylene diene rubber point, the former is the copolymer of ethene and propylene, is represented with EPM, and the latter is second
The copolymer of alkene, propylene and a small amount of non-conjugated diene hydrocarbon Third monomer, is represented with EPDM.Both are referred to as EP rubbers, i.e.,
ethylene propylene rubber(EPR).It is widely used in automobile component, building water-proof material, electric wire shield
Set, heat-resistant rubber hose, adhesive tape, automotive sealant, lube oil additive and other products.Due to ethylene propylene diene rubber thermal conductivity only
0.25W/mK, greatly limit its application on automobile Heat Conduction Material.
The content of the invention
Automobile graphene composite material it is an object of the invention to provide a kind of high heat conductance and preparation method thereof.
To achieve the above object, the present invention provides following technical scheme：
A kind of automobile graphene composite material, according to mass percent meter, is made up of following raw material：Graphene 2.2~
2.9%th, modified meerschaum powder 18~23%, ethylene propylene diene rubber 66~74%, fluoroether rubber 1.8~2.5%, castor oil acid barium
0.4~0.7%, lauryl sodium sulfate 0.3~0.6%, the tertiary butane 1.3~1.6% of peroxidating two, age resistor ODA 0.9~
1.3%th, antioxidant H 1.1~1.4%；The preparation of described modified meerschaum powder, step is：Sepiolite powder is broken into sepiolite
Powder, drying, dried sepiolite powder is mixed with ether, and ultrasonic disperse obtains finely dispersed suspension, is added in suspension
Mix backflow after entering superfine silica gel powder, reflux temperature is 82~90 DEG C, and return time is 2~3h, separates solid, after drying, is obtained final product
Modified meerschaum powder.
As further scheme of the invention：According to mass percent meter, it is made up of following raw material：Graphene 2.4~
2.6%th, modified meerschaum powder 19~22%, ethylene propylene diene rubber 68~72%, fluoroether rubber 2.0~2.3%, castor oil acid barium
0.5~0.6%, lauryl sodium sulfate 0.4~0.5%, the tertiary butane 1.4~1.5% of peroxidating two, age resistor ODA 1.1~
1.2%th, antioxidant H 1.2~1.3%；The preparation of described modified meerschaum powder, step is：Sepiolite powder is broken into sepiolite
Powder, drying, dried sepiolite powder is mixed with ether, and ultrasonic disperse obtains finely dispersed suspension, is added in suspension
Mix backflow after entering superfine silica gel powder, reflux temperature is 85~88 DEG C, and return time is 2.2~2.6h, separates solid, after drying,
Obtain final product modified meerschaum powder.
As further scheme of the invention：According to mass percent meter, it is made up of following raw material：Graphene 2.6%, change
Property sepiolite powder 20%, ethylene propylene diene rubber 70%, fluoroether rubber 2.3%, castor oil acid barium 0.6%, lauryl sodium sulfate
0.5%th, the tertiary butane 1.5% of peroxidating two, age resistor ODA 1.2%, antioxidant H 1.3%；Described modified meerschaum powder
Prepare, step is：Sepiolite powder is broken into sepiolite powder, is dried, dried sepiolite powder mixed with ether, ultrasonic disperse
Finely dispersed suspension is obtained, to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 86 DEG C, and return time is
2.4h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, 4~5h of stirring reaction at a temperature of 235~245 DEG C, discharge, room temperature is obtained final product after drying through shaping
Described automobile graphene composite material.
Application of the described composite in terms of automobile Heat Conduction Material is prepared.
Compared with prior art, the beneficial effects of the invention are as follows：Graphene and fluorine ether rubber of the present invention using high heat conductance
Glue and the combined main body as composite of ethylene propylene diene rubber, by incorporating modified sepiolite powder, and use age resistor
By the way of ODA and antioxidant H, a kind of composite of high heat conductance, the heat conduction that the composite has not only had is obtained
Performance, also with excellent bending strength, tensile strength, heat distortion temperature, can be widely used as automobile Heat Conduction Material.
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described,
Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment 1
In the embodiment of the present invention, a kind of automobile graphene composite material, according to mass percent meter, by following raw material group
Into：Graphene 2.2%, modified meerschaum powder 18%, ethylene propylene diene rubber 74%, fluoroether rubber 1.8%, castor oil acid barium
0.4%th, lauryl sodium sulfate 0.3%, the tertiary butane 1.3% of peroxidating two, age resistor ODA 0.9%, antioxidant H 1.1%；
The preparation process of modified meerschaum powder is：Sepiolite powder is broken into sepiolite powder, is dried, by dried sepiolite powder and ether
Mixing, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 82
DEG C, return time is 3h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, the stirring reaction 5h at a temperature of 235 DEG C, discharge, room temperature obtains final product described vapour after drying through shaping
Automobile-used graphene composite material.
Embodiment 2
In the embodiment of the present invention, a kind of automobile graphene composite material, according to mass percent meter, by following raw material group
Into：Graphene 2.9%, modified meerschaum powder 23%, ethylene propylene diene rubber 66%, fluoroether rubber 2.5%, castor oil acid barium
0.7%th, lauryl sodium sulfate 0.6%, the tertiary butane 1.6% of peroxidating two, age resistor ODA 1.3%, antioxidant H 1.4%；
The preparation process of modified meerschaum powder is：Sepiolite powder is broken into sepiolite powder, is dried, by dried sepiolite powder and ether
Mixing, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 90
DEG C, return time is 2h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, the stirring reaction 4h at a temperature of 245 DEG C, discharge, room temperature obtains final product described vapour after drying through shaping
Automobile-used graphene composite material.
Embodiment 3
In the embodiment of the present invention, a kind of automobile graphene composite material, according to mass percent meter, by following raw material group
Into：Graphene 2.4%, modified meerschaum powder 19%, ethylene propylene diene rubber 72%, fluoroether rubber 2.0%, castor oil acid barium
0.5%th, lauryl sodium sulfate 0.4%, the tertiary butane 1.4% of peroxidating two, age resistor ODA 1.1%, antioxidant H 1.2%；
The preparation process of modified meerschaum powder is：Sepiolite powder is broken into sepiolite powder, is dried, by dried sepiolite powder and ether
Mixing, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 85
DEG C, return time is 2.6h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, the stirring reaction 5h at a temperature of 235 DEG C, discharge, room temperature obtains final product described vapour after drying through shaping
Automobile-used graphene composite material.
Embodiment 4
In the embodiment of the present invention, a kind of automobile graphene composite material, according to mass percent meter, by following raw material group
Into：Graphene 2.6%, modified meerschaum powder 22%, ethylene propylene diene rubber 68%, fluoroether rubber 2.3%, castor oil acid barium
0.6%th, lauryl sodium sulfate 0.5%, the tertiary butane 1.5% of peroxidating two, age resistor ODA 1.2%, antioxidant H 1.3%；
The preparation process of modified meerschaum powder is：Sepiolite powder is broken into sepiolite powder, is dried, by dried sepiolite powder and ether
Mixing, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 88
DEG C, return time is 2.2h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, the stirring reaction 4h at a temperature of 245 DEG C, discharge, room temperature obtains final product described vapour after drying through shaping
Automobile-used graphene composite material.
Embodiment 5
In the embodiment of the present invention, a kind of automobile graphene composite material, according to mass percent meter, by following raw material group
Into：Graphene 2.6%, modified meerschaum powder 20%, ethylene propylene diene rubber 70%, fluoroether rubber 2.3%, castor oil acid barium
0.6%th, lauryl sodium sulfate 0.5%, the tertiary butane 1.5% of peroxidating two, age resistor ODA 1.2%, antioxidant H 1.3%；
The preparation process of modified meerschaum powder is：Sepiolite powder is broken into sepiolite powder, is dried, by dried sepiolite powder and ether
Mixing, ultrasonic disperse obtains finely dispersed suspension, and to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 86
DEG C, return time is 2.4h, separates solid, after drying, obtains final product modified meerschaum powder.
The preparation method of described automobile graphene composite material, comprises the following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, ten are weighed in proportion
Sodium dialkyl sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, is obtained and changes
The uniform homogeneous blend of property sepiolite powder and rubber；
(4) uniform homogeneous blend and Graphene are sufficiently mixed in input to high-speed mixer jointly, then proceed to by than
Example adds castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, is adequately mixed
Afterwards, pour into blending extrusion machine, the stirring reaction 4.5h at a temperature of 240 DEG C, discharge, room temperature obtains final product described through shaping after drying
Automobile graphene composite material.
Comparative example 1
On the basis of embodiment 5, modified meerschaum powder is replaced with into sepiolite powder, remaining is identical with embodiment 5.
Comparative example 2
On the basis of embodiment 5, modified meerschaum powder is replaced with into talcum powder, remaining is identical with embodiment 5.
Comparative example 3
On the basis of embodiment 5, fluoroether rubber is replaced with into fluorubber, remaining is identical with embodiment 5.
Comparative example 4
On the basis of embodiment 5, antioxidant H is replaced with into age resistor ODA, remaining is identical with embodiment 5.
The results of property of composite obtained in each example of table 1
To above-described embodiment 1~5 and obtained in comparative example 1~4, composite carries out performance test, as a result such as the institute of table 1
Show.As can be seen from Table 1：Compared with comparative example 1~4, the heat conductivility of composite obtained in embodiment 1~5 has obvious
Advantage, and composite is with the obvious advantage in terms of bending strength, tensile strength obtained in embodiment 1~5, heat distortion temperature
It is higher and melt index is relatively low, in the composite with prominent advantage.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined
May be appreciated other embodiment.
Claims (5)
1. a kind of automobile graphene composite material, it is characterised in that according to mass percent meter, be made up of following raw material：Stone
Black alkene 2.2~2.9%, modified meerschaum powder 18~23%, ethylene propylene diene rubber 66~74%, fluoroether rubber 1.8~2.5%,
Castor oil acid barium 0.4~0.7%, lauryl sodium sulfate 0.3~0.6%, the tertiary butane 1.3~1.6%, age resistor of peroxidating two
ODA 0.9~1.3%, antioxidant H 1.1~1.4%；The preparation of described modified meerschaum powder, step is：By sepiolite powder
Sepiolite powder is broken into, is dried, dried sepiolite powder is mixed with ether, ultrasonic disperse obtains finely dispersed suspension, to
Mix backflow after superfine silica gel powder is added in suspension, reflux temperature is 82~90 DEG C, and return time is 2~3h, separates solid, is done
After dry, modified meerschaum powder is obtained final product.
2. automobile graphene composite material according to claim 1, it is characterised in that according to mass percent meter, by
Following raw material composition：Graphene 2.4~2.6%, modified meerschaum powder 19~22%, ethylene propylene diene rubber 68~72%, fluorine ether
Rubber 2.0~2.3%, castor oil acid barium 0.5~0.6%, lauryl sodium sulfate 0.4~0.5%, the tertiary butane of peroxidating two
1.4~1.5%, age resistor ODA 1.1~1.2%, antioxidant H 1.2~1.3%；The preparation of described modified meerschaum powder,
Step is：Sepiolite powder is broken into sepiolite powder, is dried, dried sepiolite powder mixed with ether, ultrasonic disperse score
Uniform suspension is dissipated, to backflow is mixed after superfine silica gel powder is added in suspension, reflux temperature is 85~88 DEG C, and return time is
2.2~2.6h, separates solid, after drying, obtains final product modified meerschaum powder.
3. automobile graphene composite material according to claim 2, it is characterised in that according to mass percent meter, by
Following raw material composition：Graphene 2.6%, modified meerschaum powder 20%, ethylene propylene diene rubber 70%, fluoroether rubber 2.3%, castor-oil plant
Barium oleate 0.6%, lauryl sodium sulfate 0.5%, the tertiary butane 1.5% of peroxidating two, age resistor ODA 1.2%, antioxidant H
1.3%；The preparation of described modified meerschaum powder, step is：Sepiolite powder is broken into sepiolite powder, is dried, will be dried
Sepiolite powder mixes with ether, and ultrasonic disperse obtains finely dispersed suspension, mixes back after addition superfine silica gel powder in suspension
Stream, reflux temperature is 86 DEG C, and return time is 2.4h, separates solid, after drying, obtains final product modified meerschaum powder.
4. according to the preparation method of any described automobile graphene composite material of claims 1 to 3, it is characterised in that bag
Include following steps：
(1) Graphene, modified meerschaum powder, ethylene propylene diene rubber, fluoroether rubber, castor oil acid barium, dodecane are weighed in proportion
Base sodium sulphate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, it is standby；
(2) ethylene propylene diene rubber and fluoroether rubber are well mixed in proportion, obtain rubber composition；
(3) modified meerschaum powder is evenly dispersed into rubber composition by air blast dispersion method then, modified sea is obtained
The uniform homogeneous blend of afrodite powder and rubber；
(4) uniform homogeneous blend is put into high-speed mixer jointly with Graphene and is sufficiently mixed, then proceed to add in proportion
Enter castor oil acid barium, lauryl sodium sulfate, the tertiary butane of peroxidating two, age resistor ODA, antioxidant H, after sufficiently mixing,
Enter in blending extrusion machine, 4~5h of stirring reaction at a temperature of 235~245 DEG C discharges, room temperature obtains final product described through shaping after drying
Automobile graphene composite material.
5. application of the composite as described in claims 1 to 3 is any in terms of automobile Heat Conduction Material is prepared.
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| CN102993731A (en) * | 2012-08-20 | 2013-03-27 | 安徽凯迪电气有限公司 | Manufacturing process of instrument socket |
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|---|---|---|---|---|
| CN102993731A (en) * | 2012-08-20 | 2013-03-27 | 安徽凯迪电气有限公司 | Manufacturing process of instrument socket |
| CN103102597A (en) * | 2012-11-14 | 2013-05-15 | 安徽金桥电缆有限公司 | Anti-cracking cable material for wind power generation and preparation method thereof |
| CN105694236A (en) * | 2016-02-18 | 2016-06-22 | 繁昌县菲德通讯材料设计有限公司 | Oil-proof high-and low-temperature resistant cable |
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Application publication date: 20170531 |