CN104778991A - Polyamide-imide finish for corona-resistant enameled wire - Google Patents
Polyamide-imide finish for corona-resistant enameled wire Download PDFInfo
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- CN104778991A CN104778991A CN201510161007.6A CN201510161007A CN104778991A CN 104778991 A CN104778991 A CN 104778991A CN 201510161007 A CN201510161007 A CN 201510161007A CN 104778991 A CN104778991 A CN 104778991A
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- 239000004962 Polyamide-imide Substances 0.000 title abstract description 9
- 229920002312 polyamide-imide Polymers 0.000 title abstract description 9
- 239000003973 paint Substances 0.000 claims abstract description 51
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 230000001050 lubricating effect Effects 0.000 claims abstract description 33
- 239000002904 solvent Substances 0.000 claims abstract description 26
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004113 Sepiolite Substances 0.000 claims abstract description 14
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 14
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 14
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- 229920002545 silicone oil Polymers 0.000 claims abstract description 12
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 11
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002585 base Substances 0.000 claims description 19
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 13
- 229910052750 molybdenum Inorganic materials 0.000 claims description 13
- 239000011733 molybdenum Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003068 static effect Effects 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 abstract 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 abstract 1
- 229920000573 polyethylene Polymers 0.000 abstract 1
- 239000008096 xylene Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 27
- 239000011248 coating agent Substances 0.000 description 26
- 239000010410 layer Substances 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000011247 coating layer Substances 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920003055 poly(ester-imide) Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000004605 External Lubricant Substances 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 238000007591 painting process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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- Insulated Conductors (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses polyamide-imide finish for a corona-resistant enameled wire. The polyamide-imide finish comprises, in terms of the total weight accounting for 100 parts, components as follows: 1-10 parts of a lubricating abrasion-resistant component, 1-10 parts of a solvent and the balance of base paint, wherein the lubricating abrasion-resistant component is a mixture of molybdenum disulfide, sepiolite powder, polytetrafluoroethylene, polyethylene wax and silicone oil in the ratio of (20-30):(20-30):(15-25):(15-25):(5-15) in terms of the total weight accounting for 100 parts; the solvent is a mixture of N-methylpyrrolidone and xylene in the weight ratio of (1-2):1; the base paint is polyamide-imide paint. The polyamide-imide finish can decrease the static friction coefficient of the corona-resistant enameled wire, is good in improvement effect on the corona resistance of the corona-resistant enameled wire and is applicable to driving motors of new-energy vehicles.
Description
Technical field
The invention belongs to enamelled wire manufacturing technology field, be specifically related to a kind of polyamidoimide finish paint that can be used for multicoat compound withstands corona enamelled wire external skin and use.
Background technology
At present, because withstands corona enamelled wire has higher thermal endurance and corona resisting characteristics, be widely used in fields such as industrial variable-frequency motor and automobile drive electric motors.Withstands corona enamelled wire structure, is published in the paper " development of withstands corona enamelled wire and Exploration of Mechanism " of " copper industrial engineering (IE) " the 2nd phase in 2012: the conductor external insulation of withstands corona enamelled wire is coated with three-layer insulated coating from inside to outside usually see author Luo Xin.Undercoating adopts polyester-imide coating usually, and inter coat adopts withstands corona coating, and external coating adopts polyamidoimide coating usually.The performance of three kinds of coatings is different with the effect born.Polyester-imide layer and copper cash have good tack, and shortcoming is that hydrolysis, oil resistant and chemical resistance are poor; The advantage of withstands corona coating has good withstands corona under being high voltagehigh frequency state, and shortcoming is that tack is poor, can not do primary coat, and simultaneously owing to there being inserts, its levelability is poor, and surface quality is poor, is not suitable for equally doing external coating; The advantage of polyamidoimide is that thermal endurance is high, hydrolysis, chemical resistance are good, and shortcoming is that tack is poor, is only suitable for external coating.
In coil manufacturing process, for adapting to high-speed winding equipment needs, enamelled wire surface need increase one deck lubricating layer, to reduce its coefficient of friction, improves lubrification and the slickness of enamelled wire surface, to reach good coiling performance and winding performance.This lubricating layer is mainly adopted coating in two ways and is got on, a kind of be after painting process with felt by the surface of lubricant application to enamelled wire, shortcoming easily produces precipitation with the external lubricant of felt coating along with the change of ambient temperature, and can friction loss be produced in winding process, the demand of high-speed winding cannot be met.Another kind of mode is on external coating, use the self-lubricating paint adding in-lubricant, and this lubricant and matrix resin are immiscible, can move to the surface of line in film forming solidification process.One deck self-lubricating paint is applied outward again at withstands corona enamelled wire, although the coefficient of friction of withstands corona enamelled wire can be reduced, but a set of self-lubricating device for painting must be increased again, become four coating enamelled wires, scrap build cost is huge, also will certainly increase coating layer thickness, keeping the thickness that will certainly reduce withstands corona coating under the constant prerequisite of whole wire diameter, withstands corona particle total amount in coating is declined, withstands corona effect is declined, the occasion that Inverter fed motor requirement is high can not be applied to.Such as, new-energy automobile drive motors is as the core component of new-energy automobile, it has, and torque is large, power density large, and the high frequency tolerant pulse voltage time of 200 grades of common compound withstands corona enamelled wires even only has 4h, cannot meet the instructions for use of new technology far away.
Summary of the invention
Object of the present invention is and overcomes above-mentioned the deficiencies in the prior art, a kind of modified polyamide imide finish paint for withstands corona enamelled wire is provided, there is the feature of low-friction coefficient and high-wear resistance, the thickness of withstands corona enamelled wire external coating and priming coat can be reduced, withstands corona coating layer thickness is increased, effectively can improve the withstands corona effect of withstands corona enamelled wire.
For achieving the above object, present invention employs following technical scheme:
For the polyamidoimide finish paint of withstands corona enamelled wire, comprising lubricating and wear-resisting composition, solvent and base paint, is 100 parts in total weight, and its component proportioning is: lubricating and wear-resisting composition 1 ~ 10 part; Solvent 1 ~ 10 part; All the other are base paint; Described lubricating and wear-resisting composition is the mixture of molybdenum bisuphide, sepiolite powder, polytetrafluoroethylene, Tissuemat E and silicone oil, and be 100 parts in total weight, its configuration proportion is: 20 ~ 30:20 ~ 30:15 ~ 25:15 ~ 25:5 ~ 15; Described solvent is the mixture of 1-METHYLPYRROLIDONE and dimethylbenzene, both by weight configuration proportion be: 1 ~ 2:1; Described base paint is polyamidoimide paint.
The lubricant effect of common self-lubricating paint is excellent, because Lubrication Composition is separated out to top layer, inter-layer bonding force can be caused in the process that multiple tracks is applied to be deteriorated, and is therefore only suitable for single track coating.Molybdenum bisuphide and sepiolite powder is added in the lubricious wear-resisting composition of the present invention, on the one hand due to the good wear performance of molybdenum bisuphide and sepiolite powder, finish paint anti-wear performance can be improved, Tissuemat E in paint can be reduced on the other hand, the content of the conventional Lubrication Composition such as silicone oil, to reduce front road coating when baking-curing to surface migration amount, the appropriate film thickness increasing the japanning of front road on enamelling process simultaneously, such as control at 5 ~ 6 μm, to make when normal cure lubricant cannot fast transferring to surface, thus ensure that in rear road lacquering process, inter-layer bonding force does not decline, last paint together routinely THICKNESS CONTROL at 2 ~ 3 μm, make its over-curing, lubricant can produce lubrication to surface by fast transferring, like this, the requirement of multiple tracks coating can be adapted to, low-friction coefficient and high-wear resistance can be reached again.
Further, lubricating and wear-resisting composition 3 ~ 7 parts; Solvent 3 ~ 7 parts; All the other are base paint.
Further, described lubricating and wear-resisting composition is 100 parts in total weight, and the configuration proportion of molybdenum bisuphide, sepiolite powder, polytetrafluoroethylene, Tissuemat E and silicone oil is: 25:25:20:20:10.
The polyamidoimide finish paint that the present invention is used for withstands corona enamelled wire can be prepared as follows: the lubricating and wear-resisting composition of 70% ~ 80%, solvent and base paint are stirred 1 ~ 1.5 hour at temperature 75 ~ 85 DEG C, be cooled to room temperature, add remaining lubricating and wear-resisting composition, stir 2 ~ 2.5 hours again, obtain target product after filtration.
Major advantage of the present invention is: the confficient of static friction that can reduce withstands corona enamelled wire, confficient of static friction is reduced to less than 0.06 from 0.1 of lubrication before, anti-wear performance is also improved largely, scrape paint as unidirectional and bring up to 20N from 15N, back and forth scrape paint and bring up to 150 times from 80 times, because the feature of low-friction coefficient and high-wear resistance makes the external coating of withstands corona enamelled wire and primer thickness sum be reduced to 30% by 60% before, and pliability and tack all can reach the requirement of new-energy automobile drive motors electromagnetic wire.
This modification finish paint of the present invention is adopted to replace common polyamide imide coating as the external coating of compound withstands corona enamelled wire, do not need to apply lubricating layer more in addition, not only coefficient of friction is low, high-speed winding equipment needs can be met, and the pliability of paint film and resistance to wear good, both external coating thickness can have been made to be reduced to about 15% by account for whole coating layer thickness more than 20%, also primer thickness can be made to be reduced to about 15% by account for whole coating layer thickness more than 40%, the thickness of middle withstands corona coating is obviously increased, the corona-resistance property of withstands corona paint is effective, the high frequency tolerant pulse voltage time brings up to more than 50 hours in 4 hours by common 200 grades of compound withstands corona enamelled wires, improve more than 10 times, thus effectively can resist the long-term impact of high frequency voltage pulse, the actual life of enamelled wire can be significantly improved, be applicable to new-energy automobile drive motors.
Embodiment
For ease of understanding, herein by below by way of each embodiment, so that the invention will be further described.
The present invention is made up of lubricating and wear-resisting composition, solvent and base paint.Base paint used is polyamide-imide enamelled wire varnishes that 200 grades of polyamide-imide resins synthesized with cyanic acid ester process are base, that obtain with the dilution of suitable dissolution with solvents, meets standard JB/T 7599.7-2013.Lubricating and wear-resisting composition is the mixture of molybdenum bisuphide, sepiolite powder, polytetrafluoroethylene, Tissuemat E and silicone oil.Molybdenum bisuphide fineness is not more than 325 orders, and sepiolite powder fineness is not more than 200 orders.Solvent is the mixture of 1-METHYLPYRROLIDONE and dimethylbenzene.
The polyamidoimide finish paint that the present invention is used for withstands corona enamelled wire is prepared as follows: the lubricating and wear-resisting composition of 70% ~ 80%, solvent and base paint are stirred 1 ~ 1.5 hour at temperature 75 ~ 85 DEG C, be cooled to room temperature, add remaining lubricating and wear-resisting composition, stir 2 ~ 2.5 hours again, obtain target product after filtration.
Embodiment 1
Polyamidoimide finish paint is 100 parts in total weight, comprising: lubricating and wear-resisting composition 1 part, solvent 3 parts, 96 parts, base paint.
Lubricating and wear-resisting composition is 100 parts in total weight, molybdenum bisuphide 30 parts, sepiolite powder 30 parts, polytetrafluoroethylene 15 parts, Tissuemat E 15 parts, silicone oil 10 parts.
Solvent with mass ratio range, 1-METHYLPYRROLIDONE: dimethylbenzene=1:1.
Embodiment 2
Polyamidoimide finish paint is 100 parts in total weight, comprising: lubricating and wear-resisting composition 3 parts, solvent 7 parts, 90 parts, base paint.
Lubricating and wear-resisting composition is 100 parts in total weight, molybdenum bisuphide 20 parts, sepiolite powder 30 parts, polytetrafluoroethylene 20 parts, Tissuemat E 25 parts, silicone oil 5 parts.
Solvent with mass ratio range, 1-METHYLPYRROLIDONE: dimethylbenzene=1.5:1.
Embodiment 3
Polyamidoimide finish paint is 100 parts in total weight, comprising: lubricating and wear-resisting composition 7 parts, solvent 3 parts, 90 parts, base paint.
Lubricating and wear-resisting composition is 100 parts in total weight, molybdenum bisuphide 20 parts, sepiolite powder 20 parts, polytetrafluoroethylene 25 parts, Tissuemat E 20 parts, silicone oil 15 parts.
Solvent with mass ratio range, 1-METHYLPYRROLIDONE: dimethylbenzene=2:1.
Embodiment 4
Polyamidoimide finish paint is 100 parts in total weight, comprising: lubricating and wear-resisting composition 10 parts, solvent 3 parts, 87 parts, base paint.
Lubricating and wear-resisting composition is 100 parts in total weight, molybdenum bisuphide 20 parts, sepiolite powder 20 parts, polytetrafluoroethylene 25 parts, Tissuemat E 25 parts, silicone oil 10 parts.
Solvent with mass ratio range, 1-METHYLPYRROLIDONE: dimethylbenzene=1.5:1.
Embodiment 5
Polyamidoimide finish paint is 100 parts in total weight, comprising: lubricating and wear-resisting composition 5 parts, solvent 1 part, 94 parts, base paint.
Lubricating and wear-resisting composition is 100 parts in total weight, molybdenum bisuphide 25 parts, sepiolite powder 25 parts, polytetrafluoroethylene 20 parts, Tissuemat E 20 parts, silicone oil 10 parts.
Solvent with mass ratio range, 1-METHYLPYRROLIDONE: dimethylbenzene=1.2:1.
For the withstands corona enamelled wire of production wire diameter 0.80mm, undercoating adopts 180 grades of polyester-imide coating, and inter coat adopts 200 grades of withstands corona coating.Undercoating is coated with 3 roads, thickness about 13 ~ 17 μm, and inter coat is coated with 14 roads, thickness about 70 ~ 75 μm, and external coating adopts polyamidoimide finish paint of the present invention, is coated with 3 roads altogether, and front twice film thickness controls at 5 ~ 6 μm, and last one film thickness controls at 2 ~ 3 μm.The each coating layer thickness of products obtained therefrom is about from inside to outside successively: 15%, 70%, 15%.After testing, adopt the enamelled wire confficient of static friction of the various embodiments described above finish paint lower than 0.06, the high frequency tolerant pulse voltage time reaches more than 50 hours.
Claims (4)
1. for the polyamidoimide finish paint of withstands corona enamelled wire, it is characterized in that: comprise lubricating and wear-resisting composition, solvent and base paint, is 100 parts in total weight, and its component proportioning is: lubricating and wear-resisting composition 1 ~ 10 part; Solvent 1 ~ 10 part; All the other are base paint; Described lubricating and wear-resisting composition is the mixture of molybdenum bisuphide, sepiolite powder, polytetrafluoroethylene, Tissuemat E and silicone oil, and be 100 parts in total weight, its configuration proportion is: 20 ~ 30:20 ~ 30:15 ~ 25:15 ~ 25:5 ~ 15; Described solvent is the mixture of 1-METHYLPYRROLIDONE and dimethylbenzene, both by weight configuration proportion be: 1 ~ 2:1; Described base paint is polyamidoimide paint.
2. the polyamidoimide finish paint for withstands corona enamelled wire according to claim 1, is characterized in that: lubricating and wear-resisting composition 3 ~ 7 parts; Solvent 3 ~ 7 parts; All the other are base paint.
3. the polyamidoimide finish paint for withstands corona enamelled wire according to claim 1, it is characterized in that: described lubricating and wear-resisting composition is 100 parts in total weight, the configuration proportion of molybdenum bisuphide, sepiolite, polytetrafluoroethylene, Tissuemat E and silicone oil is: 25:25:20:20:10.
4. the polyamidoimide finish paint for withstands corona enamelled wire according to claim 1, it is characterized in that: the lubricating and wear-resisting composition of 70% ~ 80%, solvent and base paint are stirred 1 ~ 1.5 hour at temperature 75 ~ 85 DEG C, be cooled to room temperature, add remaining lubricating and wear-resisting composition, stir 2 ~ 2.5 hours again, obtain target product after filtration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161007.6A CN104778991B (en) | 2015-04-07 | 2015-04-07 | Polyamide-imide finish for corona-resistant enameled wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510161007.6A CN104778991B (en) | 2015-04-07 | 2015-04-07 | Polyamide-imide finish for corona-resistant enameled wire |
Publications (2)
| Publication Number | Publication Date |
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| CN104778991A true CN104778991A (en) | 2015-07-15 |
| CN104778991B CN104778991B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510161007.6A Active CN104778991B (en) | 2015-04-07 | 2015-04-07 | Polyamide-imide finish for corona-resistant enameled wire |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104804503A (en) * | 2015-04-21 | 2015-07-29 | 铜陵精达里亚特种漆包线有限公司 | Corona-proof enameled wire for new energy automobiles and manufacturing method of corona-proof enameled wire |
| CN106543890A (en) * | 2016-10-26 | 2017-03-29 | 哈尔滨理工大学 | A kind of method that chemical mixed nanometer prepares Inverter fed motor polyamide-imide enamelled wire varnishes |
| CN106752893A (en) * | 2016-12-16 | 2017-05-31 | 吴中区穹窿山福顺生物技术研究所 | A kind of cable corrosion-resistant varnished wire paint and preparation method thereof |
| CN109988496A (en) * | 2019-04-08 | 2019-07-09 | 惠州市登高达电业有限公司 | A kind of enamelled wire insulated paint and preparation method thereof |
| CN114093556A (en) * | 2021-10-11 | 2022-02-25 | 铜陵精达新技术开发有限公司 | Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104804503A (en) * | 2015-04-21 | 2015-07-29 | 铜陵精达里亚特种漆包线有限公司 | Corona-proof enameled wire for new energy automobiles and manufacturing method of corona-proof enameled wire |
| CN104804503B (en) * | 2015-04-21 | 2017-12-19 | 铜陵精达里亚特种漆包线有限公司 | Anti- corona enamel-covered wire and its manufacture method available for new-energy automobile |
| CN106543890A (en) * | 2016-10-26 | 2017-03-29 | 哈尔滨理工大学 | A kind of method that chemical mixed nanometer prepares Inverter fed motor polyamide-imide enamelled wire varnishes |
| CN106543890B (en) * | 2016-10-26 | 2018-09-28 | 哈尔滨理工大学 | A kind of method that chemistry mixed nanometer prepares Inverter fed motor polyamide-imide enamelled wire varnishes |
| CN106752893A (en) * | 2016-12-16 | 2017-05-31 | 吴中区穹窿山福顺生物技术研究所 | A kind of cable corrosion-resistant varnished wire paint and preparation method thereof |
| CN109988496A (en) * | 2019-04-08 | 2019-07-09 | 惠州市登高达电业有限公司 | A kind of enamelled wire insulated paint and preparation method thereof |
| CN114093556A (en) * | 2021-10-11 | 2022-02-25 | 铜陵精达新技术开发有限公司 | Corona-resistant electromagnetic wire for new energy automobile driving motor and preparation method thereof |
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| CN104778991B (en) | 2017-01-25 |
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| C06 | Publication | ||
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Effective date of registration: 20200610 Address after: 244000 no.988, north section of Huangshan Avenue, Tongling Economic and Technological Development Zone, Anhui Province Co-patentee after: TONGLING JINGDA REA SPECIAL ENAMELED WIRE Co.,Ltd. Patentee after: JINGDA SPECIAL ELECTROMAGNETIC Address before: 244000, No. 806 north section of Mount Huangshan Road, Tongling economic and Technological Development Zone, Anhui Patentee before: TONGLING JINGDA REA SPECIAL ENAMELED WIRE Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CP03 | Change of name, title or address |
Address after: 244000 No. 988, north section of Huangshan Avenue, Tongling Economic and Technological Development Zone, Anhui Province Patentee after: JINGDA SPECIAL ELECTROMAGNETIC Country or region after: China Patentee after: Tongling Jingda Rea Special Enameled Wire Co.,Ltd. Address before: 244000 No. 988, north section of Huangshan Avenue, Tongling Economic and Technological Development Zone, Anhui Province Patentee before: JINGDA SPECIAL ELECTROMAGNETIC Country or region before: China Patentee before: TONGLING JINGDA REA SPECIAL ENAMELED WIRE CO.,LTD. |
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| CP03 | Change of name, title or address |