CN107286840A - A kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof - Google Patents
A kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof Download PDFInfo
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- CN107286840A CN107286840A CN201710612058.5A CN201710612058A CN107286840A CN 107286840 A CN107286840 A CN 107286840A CN 201710612058 A CN201710612058 A CN 201710612058A CN 107286840 A CN107286840 A CN 107286840A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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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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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- 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
Abstract
The invention discloses a kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof, wherein, the preparation method includes：Nano-aluminium oxide, nano silicon, nano zine oxide, nano magnesia, polyamidoimide and N methyl pyrrolidones are mixed, it is scattered after obtain pre-dispersed liquid；Composite insulating varnish will be obtained after the mixing of pre-dispersed liquid, phenolic resin, polyester imines, carbon fiber and organic solvent, heating；Composite insulating varnish is coated to copper cash billet surface, obtains being enclosed with the copper cash of nano-composite insulating material after drying；Solve Application of micron and also there is many weak points in insulating materials, such as resistance to frequency conversion performance and heat resistance are not enough, the easy aging of insulating materials causes the problems such as its service life declines.
Description
Technical field
The present invention relates to the preparation of copper cash, in particular it relates to a kind of copper cash for being enclosed with nano-composite insulating material and its
Preparation method.
Background technology
Nano-particle refers to small solid particle of the granularity in the range of 1 ~ 100nm, and nanoparticle surface atom accounts for very big
Ratio and be the vaporous structure of unordered class, nano-particle specific structure makes it have bulk effect, surface and interfacial effect, amount
Sub- dimensional effect, macro quanta tunnel effect and Dielectric confinement effect etc., compared with conventional powder material, with a series of special
Physics, the chemical property such as electricity, light, catalysis, it is aobvious in fields such as electronic material, magnetic material, photocatalysis, medical science and bioengineering
Show to be widely applied prospect.Oneself, through there is some to apply, such as uses nanometer material to nano material at present in terms of electrician's electric insulation
Expect the obtained new insulation materials such as modified poly ethylene, polypropylene, polystyrene and poly- phthalimide, it is common that its function is mainly improvement
The mechanical performance and heat resistance of insulating materials.But also there is many weak points, example in insulating materials in Application of micron
Such as resistance to frequency conversion performance and heat resistance deficiency, the easy aging of insulating materials make it that its service life declines.
The content of the invention
It is an object of the invention to provide a kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof, solve
Also there is many weak points in Application of micron, such as resistance to frequency conversion performance and heat resistance are not enough, insulation material in insulating materials
Easy aging is expected so that the problems such as its service life declines.
To achieve these goals, the invention provides a kind of preparation side for the copper cash for being enclosed with nano-composite insulating material
Method, wherein, the preparation method includes：
The preparation of nano-composite insulating material：
（1）By nano-aluminium oxide, nano silicon, nano zine oxide, nano magnesia, polyamidoimide and N- first
The mixing of base pyrrolidones, it is scattered after obtain pre-dispersed liquid；
（2）Compound inslation will be obtained after the mixing of pre-dispersed liquid, phenolic resin, polyester imines, carbon fiber and organic solvent, heating
Paint；
The preparation of copper cash：Composite insulating varnish is coated to copper cash billet surface, obtains being enclosed with nano-composite insulating material after drying
The copper cash of material.
It is described to be enclosed with nano-composite insulating present invention also offers a kind of copper cash for being enclosed with nano-composite insulating material
The copper cash of material is made by above-mentioned preparation method.
By above-mentioned technical proposal, the invention provides a kind of preparation side for the copper cash for being enclosed with nano-composite insulating material
Method, wherein, the preparation method includes：By nano-aluminium oxide, nano silicon, nano zine oxide, nano magnesia,
Polyamidoimide and 1-METHYLPYRROLIDONE mixing, it is scattered after obtain pre-dispersed liquid；By pre-dispersed liquid, phenolic resin, polyester
Composite insulating varnish is obtained after imines, carbon fiber and organic solvent mixing, heating；Composite insulating varnish is coated to copper cash base substrate table
Obtain being enclosed with the copper cash of nano-composite insulating material after face, drying.Pass through the synergy between this each raw material so that be made
The copper cash for being enclosed with nano-composite insulating material not only possess excellent heat resistance and resistance to frequency performance, it is and non-aging,
It substantially prolongs its service life.
Other features and advantages of the present invention will be described in detail in subsequent embodiment part.
Embodiment
The embodiment to the present invention is described in detail below.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 end points and any value of disclosed scope 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 individual 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.
The invention provides a kind of preparation method for the copper cash for being enclosed with nano-composite insulating material, the preparation method bag
Include：
The preparation of nano-composite insulating material：
（1）By nano-aluminium oxide, nano silicon, nano zine oxide, nano magnesia, polyamidoimide and N- first
The mixing of base pyrrolidones, it is scattered after obtain pre-dispersed liquid；
（2）Compound inslation will be obtained after the mixing of pre-dispersed liquid, phenolic resin, polyester imines, carbon fiber and organic solvent, heating
Paint；
The preparation of copper cash：Composite insulating varnish is coated to copper cash billet surface, obtains being enclosed with nano-composite insulating material after drying
The copper cash of material.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, relative to the 1-METHYLPYRROLIDONE of 100 parts by weight, the oxygen of nanometer three
The consumption for changing two aluminium is 2-8 parts by weight, and the consumption of nano silicon is 2-5 parts by weight, and the consumption of nano zine oxide is 2-8 weights
Part is measured, the consumption of nano magnesia is 1-3 parts by weight, and the consumption of polyamidoimide is 10-20 parts by weight；
Relative to the organic solvent of 100 parts by weight, the consumption of pre-dispersed liquid is 30-50 parts by weight, and the consumption of phenolic resin is 10-
20 parts by weight, the consumption of polyester imines is 2-10 parts by weight, and the consumption of carbon fiber is 2-5 parts by weight.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, one kind in ethanol, ethylene glycol and ether of organic solvent or
It is a variety of.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, in step（1）In, disperse by the way of ultrasonic disperse, ultrasound
Scattered condition includes：Supersonic frequency is 10-20kHz, and ultrasonic time is 5-10min.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, in step（2）In, the condition of heating at least includes：The temperature of heating
Spend for 55-65 DEG C, the time of heating is 10-20min.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, and the average grain diameter of nano-aluminium oxide is 20-30nm, nanometer two
The average grain diameter of silica is 20-30nm, and the average grain diameter of nano zine oxide is 20-30nm, the average grain diameter of nano magnesia
For 20-30nm.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, and the weight average molecular weight of polyamidoimide is 7000-9000, polyester
The weight average molecular weight of imines is 5000-6000.
The present invention it is a kind of preferred embodiment in, in order that obtained be enclosed with nano-composite insulating material
Copper cash possesses more excellent heat resistance and resistance to frequency performance, and in the preparation of copper cash, the condition of drying at least includes：Drying
Temperature is 40-50 DEG C, and the time of drying is 2-4h.
It is described to be enclosed with nano-composite insulating present invention also offers a kind of copper cash for being enclosed with nano-composite insulating material
The copper cash of material is made by above-mentioned preparation method.
The present invention will be described in detail by way of examples below.In following examples, nano-aluminium oxide it is flat
Equal particle diameter is 20-30nm, and the average grain diameter of nano silicon is 20-30nm, and the average grain diameter of nano zine oxide is 20-
30nm, the average grain diameter of nano magnesia is 20-30nm；The weight average molecular weight of polyamidoimide is 7000-9000, and polyester is sub-
The weight average molecular weight of amine is 5000-6000.
Embodiment 1
2g nano-aluminium oxides, 2g nano silicons, 2g nano zine oxides, 1g nano magnesias, 10g polyamide acyl is sub-
Amine and the mixing of 100gN- methyl pyrrolidones, ultrasonic disperse（Supersonic frequency is 10kHz, and ultrasonic time is 5min）After obtain pre- point
Dispersion liquid；30g pre-dispersed liquids, 10g phenolic resin, 2g polyester imines, 2g carbon fibers and 100 ethanol are mixed, heated（The temperature of heating
Spend for 55 DEG C, the time of heating is 10min）After obtain composite insulating varnish；Composite insulating varnish is coated to copper cash billet surface, dried
It is dry（The temperature of drying is 40 DEG C, and the time of drying is 2h）Obtain being enclosed with the copper cash A1 of nano-composite insulating material afterwards.
Embodiment 2
8g nano-aluminium oxides, 5g nano silicons, 8g nano zine oxides, 3g nano magnesias, 20g polyamide acyl is sub-
Amine and the mixing of 100gN- methyl pyrrolidones, ultrasonic disperse（Supersonic frequency is 20kHz, and ultrasonic time is 10min）After obtain pre-
Dispersion liquid；50g pre-dispersed liquids, 20g phenolic resin, 10g polyester imines, 5g carbon fibers and 100g ethylene glycol are mixed, heated（Plus
The temperature of heat is 65 DEG C, and the time of heating is 20min）After obtain composite insulating varnish；Composite insulating varnish is coated to copper cash base substrate
Surface, drying（The temperature of drying is 50 DEG C, and the time of drying is 4h）Obtain being enclosed with the copper cash of nano-composite insulating material afterwards
A2。
Embodiment 3
By 5g nano-aluminium oxides, 3.5g nano silicons, 5g nano zine oxides, 2g nano magnesias, 15g polyamide acyls
Imines and the mixing of 100gN- methyl pyrrolidones, ultrasonic disperse（Supersonic frequency is 15kHz, and ultrasonic time is 7min）After obtain pre-
Dispersion liquid；40g pre-dispersed liquids, 15g phenolic resin, 6g polyester imines, 3.5g carbon fibers and 100g ether are mixed, heated（Plus
The temperature of heat is 60 DEG C, and the time of heating is 15min）After obtain composite insulating varnish；Composite insulating varnish is coated to copper cash base substrate
Surface, drying（The temperature of drying is 45 DEG C, and the time of drying is 3h）Obtain being enclosed with the copper cash of nano-composite insulating material afterwards
A3。
Comparative example 1
Carried out according to the method for embodiment 3, unlike, the 1-METHYLPYRROLIDONE relative to 100g, nano-aluminium oxide
Consumption be 1g, the consumption of nano silicon is 1g, and the consumption of nano zine oxide is 1g, and the consumption of nano magnesia is
0.5g, the consumption of polyamidoimide is 5g；Organic solvent relative to 100g, the consumption of pre-dispersed liquid is 25g, phenolic resin
Consumption be 5g, the consumptions of polyester imines is 1g, and the consumption of carbon fiber is 1g, obtains being enclosed with the copper of nano-composite insulating material
Line D1.
Comparative example 2
Carried out according to the method for embodiment 3, unlike, the 1-METHYLPYRROLIDONE relative to 100g, nano-aluminium oxide
Consumption be 10g, the consumption of nano silicon is 8g, and the consumption of nano zine oxide is 10g, and the consumption of nano magnesia is
5g, the consumption of polyamidoimide is 25g；Organic solvent relative to 100g, the consumption of pre-dispersed liquid is 60g, phenolic resin
Consumption be 25g, the consumptions of polyester imines is 12g, and the consumption of carbon fiber is 7g, obtains being enclosed with nano-composite insulating material
Copper cash D2.
The preferred embodiment of the present invention described in detail above, still, the present invention are not limited to the tool in above-mentioned embodiment
Body details, in the range of the technology design of the present invention, can carry out a variety of simple variants, these letters to technical scheme
Monotropic type belongs to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the present invention to it is various can
The combination of energy no longer separately illustrates.
Claims (9)
1. a kind of preparation method for the copper cash for being enclosed with nano-composite insulating material, it is characterised in that the preparation method includes：
The preparation of nano-composite insulating material：
（1）By nano-aluminium oxide, nano silicon, nano zine oxide, nano magnesia, polyamidoimide and N- first
The mixing of base pyrrolidones, it is scattered after obtain pre-dispersed liquid；
（2）Compound inslation will be obtained after the mixing of pre-dispersed liquid, phenolic resin, polyester imines, carbon fiber and organic solvent, heating
Paint；
The preparation of copper cash：Composite insulating varnish is coated to copper cash billet surface, obtains being enclosed with nano-composite insulating material after drying
The copper cash of material.
2. preparation method according to claim 1, wherein, relative to the 1-METHYLPYRROLIDONE of 100 parts by weight, nanometer three
The consumption of Al 2 O is 2-8 parts by weight, and the consumption of nano silicon is 2-5 parts by weight, and the consumption of nano zine oxide is 2-8
Parts by weight, the consumption of nano magnesia is 1-3 parts by weight, and the consumption of polyamidoimide is 10-20 parts by weight；
Relative to the organic solvent of 100 parts by weight, the consumption of pre-dispersed liquid is 30-50 parts by weight, and the consumption of phenolic resin is 10-
20 parts by weight, the consumption of polyester imines is 2-10 parts by weight, and the consumption of carbon fiber is 2-5 parts by weight.
3. preparation method according to claim 1 or 2, wherein, organic solvent in ethanol, ethylene glycol and ether one
Plant or a variety of.
4. preparation method according to claim 1 or 2, wherein, in step（1）In, disperse by the way of ultrasonic disperse,
The condition of ultrasonic disperse includes：Supersonic frequency is 10-20kHz, and ultrasonic time is 5-10min.
5. preparation method according to claim 1 or 2, wherein, in step（2）In, the condition of heating at least includes：Heating
Temperature be 55-65 DEG C, time of heating is 10-20min.
6. preparation method according to claim 1 or 2, wherein, the average grain diameter of nano-aluminium oxide is 20-30nm,
The average grain diameter of nano silicon is 20-30nm, and the average grain diameter of nano zine oxide is 20-30nm, nano magnesia it is flat
Equal particle diameter is 20-30nm.
7. preparation method according to claim 1 or 2, wherein, the weight average molecular weight of polyamidoimide is 7000-
9000, the weight average molecular weight of polyester imines is 5000-6000.
8. preparation method according to claim 1 or 2, wherein, in the preparation of copper cash, the condition of drying at least includes：
The temperature of drying is 40-50 DEG C, and the time of drying is 2-4h.
9. a kind of copper cash for being enclosed with nano-composite insulating material, it is characterised in that described to be enclosed with nano-composite insulating material
Copper cash be made as the preparation method described in any one in claim 1-8.
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| CN201710612058.5A CN107286840A (en) | 2017-07-25 | 2017-07-25 | A kind of copper cash for being enclosed with nano-composite insulating material and preparation method thereof |
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Cited By (9)
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| CN108329698A (en) * | 2018-01-24 | 2018-07-27 | 合肥尚强电气科技有限公司 | A kind of insulating materials and preparation method thereof for high-voltage electrical equipment |
| CN108359318A (en) * | 2018-03-02 | 2018-08-03 | 合肥欧仕嘉机电设备有限公司 | A kind of low-voltage electrical apparatus surface coatings and preparation method thereof |
| CN109411363A (en) * | 2018-11-05 | 2019-03-01 | 深圳粤通应用材料有限公司 | A kind of copper plating pure nickel gold-plated bonding wire and preparation method thereof again |
| CN110157281A (en) * | 2019-04-22 | 2019-08-23 | 浙江五谷铜业股份有限公司 | A kind of preparation method of overlay film copper wire |
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| CN103594201A (en) * | 2013-10-21 | 2014-02-19 | 昆山市奋发绝缘材料有限公司 | Method for preparing electromagnetic wire coated with nano-composite insulating materials |
| CN103594154A (en) * | 2013-10-21 | 2014-02-19 | 昆山市奋发绝缘材料有限公司 | Electromagnetic wire coated with nano-composite insulating materials |
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Application publication date: 20171024 |