CN1624824A - Flexible binding neodymium ferroboron magnet and manufacturing method thereof - Google Patents
Flexible binding neodymium ferroboron magnet and manufacturing method thereof Download PDFInfo
- Publication number
- CN1624824A CN1624824A CN200410052150.3A CN200410052150A CN1624824A CN 1624824 A CN1624824 A CN 1624824A CN 200410052150 A CN200410052150 A CN 200410052150A CN 1624824 A CN1624824 A CN 1624824A
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- Prior art keywords
- rubber
- magnetic
- magnet
- flexible adhesion
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- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 229910052779 Neodymium Inorganic materials 0.000 title 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 47
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000005060 rubber Substances 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims abstract description 7
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 229910001172 neodymium magnet Inorganic materials 0.000 claims description 18
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 10
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical class [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 claims description 8
- 230000005855 radiation Effects 0.000 claims description 6
- 229920000459 Nitrile rubber Polymers 0.000 claims description 5
- 229920005987 OPPANOL® Polymers 0.000 claims description 4
- 238000004132 cross linking Methods 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 239000002904 solvent Substances 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 125000000524 functional group Chemical group 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 2
- 239000005062 Polybutadiene Substances 0.000 claims description 2
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 2
- 229920005549 butyl rubber Polymers 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- 239000003431 cross linking reagent Substances 0.000 claims description 2
- 238000010894 electron beam technology Methods 0.000 claims description 2
- 239000000314 lubricant Substances 0.000 claims description 2
- 230000002101 lytic effect Effects 0.000 claims description 2
- 239000004014 plasticizer Substances 0.000 claims description 2
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- 229920001021 polysulfide Polymers 0.000 claims description 2
- 239000005077 polysulfide Substances 0.000 claims description 2
- 150000008117 polysulfides Polymers 0.000 claims description 2
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 229920002379 silicone rubber Polymers 0.000 claims description 2
- 238000004513 sizing Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 4
- 239000006247 magnetic powder Substances 0.000 abstract 2
- 238000003801 milling Methods 0.000 abstract 1
- 235000011962 puddings Nutrition 0.000 abstract 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 10
- 150000002910 rare earth metals Chemical class 0.000 description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 6
- 239000003822 epoxy resin Substances 0.000 description 6
- 229920000647 polyepoxide Polymers 0.000 description 6
- 229910000077 silane Inorganic materials 0.000 description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- ODUCDPQEXGNKDN-UHFFFAOYSA-N nitroxyl Chemical class O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000007567 mass-production technique Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000010074 rubber mixing Methods 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Hard Magnetic Materials (AREA)
Abstract
The invention relates to a flexible bond ndfeb magnet. It is uniformly in proportion mixed by the processed rubber binding agent, ndfeb magnetic powder, and processing agent. The mixture method is adopted banbury mixing, roll mixing, pudding process or screw milling. Then the uniformly mixed rubber material is formed to magnet with certain thickness by rolling and plate pressing. Its each composition weight content is that the ndfeb magnetic powder is from eighty seven percent to ninety seven percent; the modified rubber binding agent is from one percent to eight percent; the processing agent is from zero to five percent. The advantages are high production efficiency, low cost and flexibility and elasticity.
Description
Technical field
The present invention relates to a kind of bonding rare earth permanent magnet material, the invention still further relates to a kind of manufacture method of bonding rare earth permanent magnet material.
Background technology
Bonding rare earth magnet processing method in the past adopts mold pressing, injection and expressing technique more, prepared magnet all is that rigidity is inelastic, and adopt mold pressing, injection molding technique more to need the mould of a large amount of different sizes, and need carry out machine work to size in the later stage, be unfavorable for the change of magnet specification, processing cost is higher.Though simultaneously the rigidity magnet has higher magnetic property and certain freedom shape, when having motor application automaticity not high, assemble shortcoming such as inconvenience, and the magnet that is made into ultrathin (less than 1.0mm) has certain difficulty.
The flexible bonding rare-earth magnet is a kind of new product of bonding rare earth magnet, be different from the rigidity bonding rare earth magnet that injection moulding and mould pressing process are produced, with rubber is binding agent, the employing rubber processing is produced, do not need that but a large amount of mould development expenses, production efficiency height free bend do not ftracture, product size can change arbitrarily, thickness can less than 1 millimeter, be convenient to the client and assemble use, satisfied small and special electric machine to small-sized, ultra-thin, at a high speed, the requirement that develops of high accuracy and low noise direction, market prospects are good.
The flexible adhesion permanent magnet has been widely used in fields such as household electrical appliances, automobile, office automation, is in great demand.In the existing mass production techniques, the magnetic that is adopted is most to be ferrite, though this type of ferrite bonded permanent magnet has certain antioxidant anticorrosive performance and mechanical performance preferably, magnetic property is lower, can not satisfy application requirements such as high-performance small and special electric machine.
Summary of the invention
The object of the present invention is to provide a kind of novel flexible Agglutinate neodymium-iron-boron magnet, to satisfy application demands such as high-performance small and special electric machine.
Another object of the present invention is to provide the manufacture method of above-mentioned flexible adhesion Nd-Fe-B magnets.
A kind of flexible adhesion Nd-Fe-B magnets provided by the invention, its component and weight content are:
Neodymium iron boron class magnetic 87～97%
Modified rubber class binding agent 1～8%
Processing aid 0～5%.
Rare-earth magnetic of the present invention mainly is neodymium iron boron (NdFeB) class magnetic, contains rare earth element based on Nd, based on the transition elements of Fe, based on the basis of N.The magnetic property of magnet is relevant with the adding proportion of magnetic, and adding proportion is high more, and magnetic flux and magnetic energy product are high more.The average grain diameter of magnetic has certain influence to the processability of magnet, and generally at 100～1000 μ m, simultaneously in order to obtain good processing flowability, the particle size distribution of magnetic preferably is dispersity within the specific limits.The present invention's neodymium iron boron class magnetic when needed can also be also with a certain proportion of ferrite class material.
Rubber-like binding agent of the present invention has comprised one or more following blend: haloflex, acrylonitrile-butadiene rubber, ethylene-propylene rubber, neoprene, butadiene rubber, polyurethane rubber, butadiene-styrene rubber, butyl rubber, Oppanol, polysulfide rubber, silicon rubber, hydrogenated nitrile-butadiene rubber, polyisoamylene rubber, thermoplasticity class rubber etc.In order to make rubber and magnetic compatibility be arranged preferably to improve the filling ratio of magnetic in magnet, rubber need be handled through modification.Below the method for modified rubber has comprised one or more: with the mixing method of processing aid, heat plasticization method, several blend rubber method, dissolution with solvents method, functional group grafting method etc.The mixing method of processing aid is meant rubber mixing easy acquisition plasticity and filling characteristic preferably under the processing aid condition, the heat plasticization method is meant that rubber obtains plasticity under the situation of heating, blend rubber be utilized multiple rubber separately characteristic function consonance booster action is arranged under the situation of mixing, the dissolution with solvents method is to utilize solvent that rubber is melted, and functional group grafting method to be the group molecule that will have function in order to make rubber have certain specific function be grafted on the rubber molecule main chain to obtain required performance requirement, be method relatively more commonly used.
Processing aid of the present invention comprises one or more in antioxidant, crosslinking agent, coupling agent, plasticizer, lubricant, lytic agent and the age resistor.
The manufacture method of flexible adhesion Nd-Fe-B magnets of the present invention is: rubber-like binding agent that modification was handled and neodymium iron boron class magnetic and processing aid are mixed in proportion, mixed method adopts the banburying method, opens refining method, paddling process or screw mixing method, and the sizing material after will mixing then adopts rolling process or dull and stereotyped pressing to make certain thickness magnet.When the magnetic that uses is anisotropic, also should be orientated obtaining higher magnetic property, method for alignment has comprised two kinds of mechanical orientation method and magnetic field orientating methods.
Generally, the intensity of rubber is lower, under a lot of service conditions, be unappeasable, gentle for this reason rare property rare earth magnet is under the situation that the intensity instructions for use is arranged, to carry out crosslinking Treatment to magnet, make rubber form cross-linked network obtaining higher intensity, crosslinking method can adopt following a kind of: electron beam irradiation, infrared radiation, hot air, ebullated bed, microwave radiation, radiation, dull and stereotyped heating etc.
Compare with other rigidity rare earth magnet, magnet of the present invention has that production efficiency height, cost are low, pliability, softness and characteristics such as high resilience.
Embodiment
Embodiment 1
Magnet formula rate (weight ratio) is a NdFeB magnetic 90%, Oppanol 8%, epoxidized soybean oil 0.7%, ketoamine compounds 0.3%, silane coupler 0.5%, epoxy resin 0.5%.Earlier magnetic and silane coupler and epoxy resin are mixed, in mill that the magnet mixture is mixing evenly then, make at last the magnetic sheet that thickness is 1.0mm on calender, the magnetic energy product of test magnetic sheet is 5.3MGOe, and the hot strength of magnetic sheet is 2.1MPa.
Embodiment 2
Magnet formula rate (weight ratio) is a NdFeB magnetic 95%, Oppanol 3.5%, ketoamine compounds 0.3%, silane coupler 0.5%, epoxy resin 0.5%, organic peroxide 0.2%.Earlier magnetic is mixed with silane coupler and epoxy resin and make the magnetic surface modification better compatibility is arranged with rubber, on the screw mixing machine that the magnet mixture is mixing evenly then, on calender, make the magnetic sheet that thickness is 1.0mm at last.Magnetic sheet heat cross-linking, crosslinked condition are 130 ℃ of * 15min, and the magnetic energy product of test magnetic sheet is 8.5MGOe, and the hot strength of magnetic sheet is 4.0MPa.
Embodiment 3
Magnet formula rate (weight ratio) is anisotropic NdFeB magnetic 95%, acrylonitrile-butadiene rubber 2.0%, thermoplastic elastomer (TPE) 1.5%, ketoamine compounds 0.3%, silane coupler 0.5%, epoxy resin 0.5%, organic peroxide 0.2%.Earlier magnetic and silane coupler and epoxy resin are mixed, even and the thermoplastification of rubber and thermoplastic elastomer blending, on the screw mixing machine that the magnet mixture is mixing evenly then, on purl machine, make at last the magnetic sheet that thickness is 1.0mm, external magnetic field is arranged during the purl machine compressing tablet, and it is crosslinked that magnetic sheet is finished dull and stereotyped heat hot simultaneously, and crosslinked condition is 140 ℃ of * 10min, the magnetic energy product of test magnetic sheet is 11.7MGOe, and the hot strength of magnetic sheet is 3.8MPa.
Claims (8)
1, a kind of flexible adhesion Nd-Fe-B magnets, its component and weight content are:
Neodymium iron boron class magnetic 87～97%
Modified rubber class binding agent 1～8%
Processing aid 0～5%.
2, flexible adhesion Nd-Fe-B magnets according to claim 1 is characterized in that described rubber-like binding agent selects one or more in haloflex, acrylonitrile-butadiene rubber, ethylene-propylene rubber, neoprene, butadiene rubber, polyurethane rubber, butadiene-styrene rubber, butyl rubber, Oppanol, polysulfide rubber, silicon rubber, hydrogenated nitrile-butadiene rubber, polyisoamylene rubber and the thermoplasticity class rubber for use.
3, flexible adhesion Nd-Fe-B magnets according to claim 2, the method that it is characterized in that modified rubber select for use the heat plasticization method, with the mixing method of processing aid, blend rubber method, dissolution with solvents method and functional group grafting method in one or more.
4, flexible adhesion Nd-Fe-B magnets according to claim 1 is characterized in that the neodymium iron boron class magnetic that adopts can be also with ferrite class material.
5, flexible adhesion Nd-Fe-B magnets according to claim 1 is characterized in that described processing aid comprises one or more in antioxidant, crosslinking agent, coupling agent, plasticizer, lubricant, lytic agent and the age resistor.
6, the manufacture method of the described flexible adhesion Nd-Fe-B magnets of a kind of claim 1, it is characterized in that rubber-like binding agent that modification was handled and neodymium iron boron class magnetic and processing aid are mixed in proportion, mixed method adopts the banburying method, opens refining method, paddling process or screw mixing method, and the sizing material after will mixing then adopts rolling process or dull and stereotyped pressing to make certain thickness magnet.
7, the manufacture method of flexible adhesion Nd-Fe-B magnets according to claim 6 if it is characterized in that described neodymium iron boron class magnetic is anisotropic, need be orientated to obtain higher magnetic property, and method for alignment adopts mechanical orientation method or magnetic field orientating method.
8, the manufacture method of flexible adhesion Nd-Fe-B magnets according to claim 6, it is crosslinked to it is characterized in that prepared magnet need carry out it under the situation that the intensity instructions for use is arranged, and crosslinking method adopts electron beam irradiation, infrared radiation, hot air, ebullated bed, microwave radiation, radiation or dull and stereotyped heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410052150.3A CN1285083C (en) | 2004-11-11 | 2004-11-11 | Flexible binding neodymium ferroboron magnet and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410052150.3A CN1285083C (en) | 2004-11-11 | 2004-11-11 | Flexible binding neodymium ferroboron magnet and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1624824A true CN1624824A (en) | 2005-06-08 |
| CN1285083C CN1285083C (en) | 2006-11-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200410052150.3A Withdrawn - After Issue CN1285083C (en) | 2004-11-11 | 2004-11-11 | Flexible binding neodymium ferroboron magnet and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1285083C (en) |
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437842C (en) * | 2006-09-19 | 2008-11-26 | 北京大学 | Method for preparing rolling anisotropic magnetic powder and magnet |
| WO2010031264A1 (en) * | 2008-09-19 | 2010-03-25 | 广州金南磁塑有限公司 | Anisotropic flexible bonded ndfeb magnet and manufacturing method of the same |
| CN102005277A (en) * | 2010-09-30 | 2011-04-06 | 广州金南磁性材料有限公司 | Stress-field-oriented anisotropic flexible bonded neodymium-iron-boron magnet and preparation method thereof |
| CN102029394A (en) * | 2010-12-30 | 2011-04-27 | 东莞市高能磁电技术有限公司 | Method for preparing high-performance halogen-free environment-friendly rubber-plastic NdFeB (neodymium, iron and boron) extruded magnetic strip and magnetic strip |
| CN101465200B (en) * | 2008-07-22 | 2011-05-04 | 北矿磁材科技股份有限公司 | Method for manufacturing rare-earth magnetic strip |
| CN101556863B (en) * | 2009-01-16 | 2011-07-20 | 华中科技大学 | Preparing method of nylon bonded Nd-Fe-B magnet |
| CN102139369A (en) * | 2010-12-29 | 2011-08-03 | 东莞市高能磁电技术有限公司 | Preparation method of mixture of superfine neodymium, iron and boron powder and mixture |
| CN101572147B (en) * | 2009-03-04 | 2011-08-31 | 北京四海诚明科技有限公司 | Preparation method of offset magnetic sheet in hard acoustic-magnetic anti-theft label |
| CN101783219B (en) * | 2009-01-21 | 2012-09-19 | 北京中科三环高技术股份有限公司 | Flexible bonding rare-earth permanent magnet and manufacturing method thereof |
| CN102779603A (en) * | 2012-07-03 | 2012-11-14 | 大地熊（苏州）磁铁有限公司 | Flexible bonding neodymium iron boron magnet and preparation process thereof |
| WO2014029048A1 (en) * | 2012-08-20 | 2014-02-27 | 南通万宝实业有限公司 | Composite nanocrystalline nd-fe-b magnetic stripe and manufacturing method therefor |
| CN103745798A (en) * | 2014-01-09 | 2014-04-23 | 浙江和也健康科技有限公司 | Rare earth flexible magnetic stripe for health bedding and preparation method thereof |
| CN104200952A (en) * | 2014-08-05 | 2014-12-10 | 广州金南磁性材料有限公司 | Halogen-free oil-resistant high-temperature-resistant flexible ferrite rubber magnet and preparing method thereof |
| CN104637666A (en) * | 2014-12-30 | 2015-05-20 | 东莞市美厚塑磁有限公司 | Production technology and production line for flexible permanent magnetic film |
| CN104733173A (en) * | 2014-12-30 | 2015-06-24 | 东莞市美厚塑磁有限公司 | High-performance halogen-free flexible magnetic sheet preparation method and production line |
| CN105295780A (en) * | 2015-11-24 | 2016-02-03 | 三友（天津）高分子技术有限公司 | Magnetic butyl hot melt adhesive and production method thereof |
| CN111499939A (en) * | 2013-02-21 | 2020-08-07 | Nok株式会社 | Nitrile rubber composition |
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| CN114999809A (en) * | 2022-07-20 | 2022-09-02 | 横店集团东磁股份有限公司 | Rubber-plastic-based permanent magnet and preparation method and application thereof |
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| CN117133521A (en) * | 2023-10-19 | 2023-11-28 | 北京中科三环高技术股份有限公司 | Flexible magnet and preparation method thereof |
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-
2004
- 2004-11-11 CN CN200410052150.3A patent/CN1285083C/en not_active Withdrawn - After Issue
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437842C (en) * | 2006-09-19 | 2008-11-26 | 北京大学 | Method for preparing rolling anisotropic magnetic powder and magnet |
| CN101465200B (en) * | 2008-07-22 | 2011-05-04 | 北矿磁材科技股份有限公司 | Method for manufacturing rare-earth magnetic strip |
| WO2010031264A1 (en) * | 2008-09-19 | 2010-03-25 | 广州金南磁塑有限公司 | Anisotropic flexible bonded ndfeb magnet and manufacturing method of the same |
| CN101556863B (en) * | 2009-01-16 | 2011-07-20 | 华中科技大学 | Preparing method of nylon bonded Nd-Fe-B magnet |
| CN101783219B (en) * | 2009-01-21 | 2012-09-19 | 北京中科三环高技术股份有限公司 | Flexible bonding rare-earth permanent magnet and manufacturing method thereof |
| CN101572147B (en) * | 2009-03-04 | 2011-08-31 | 北京四海诚明科技有限公司 | Preparation method of offset magnetic sheet in hard acoustic-magnetic anti-theft label |
| CN102005277B (en) * | 2010-09-30 | 2012-08-22 | 广州金南磁性材料有限公司 | Stress-field-oriented anisotropic flexible bonded neodymium-iron-boron magnet and preparation method thereof |
| CN102005277A (en) * | 2010-09-30 | 2011-04-06 | 广州金南磁性材料有限公司 | Stress-field-oriented anisotropic flexible bonded neodymium-iron-boron magnet and preparation method thereof |
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| CN102029394B (en) * | 2010-12-30 | 2015-07-01 | 广东高鑫科技股份有限公司 | Method for preparing high-performance halogen-free environment-friendly rubber-plastic NdFeB (neodymium, iron and boron) extruded magnetic strip and magnetic strip |
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| WO2014029048A1 (en) * | 2012-08-20 | 2014-02-27 | 南通万宝实业有限公司 | Composite nanocrystalline nd-fe-b magnetic stripe and manufacturing method therefor |
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| CN103745798A (en) * | 2014-01-09 | 2014-04-23 | 浙江和也健康科技有限公司 | Rare earth flexible magnetic stripe for health bedding and preparation method thereof |
| CN104200952A (en) * | 2014-08-05 | 2014-12-10 | 广州金南磁性材料有限公司 | Halogen-free oil-resistant high-temperature-resistant flexible ferrite rubber magnet and preparing method thereof |
| CN104637666B (en) * | 2014-12-30 | 2017-03-29 | 东莞市美厚塑磁有限公司 | The production technology and production line of flexible permanent magnetism film |
| CN104637666A (en) * | 2014-12-30 | 2015-05-20 | 东莞市美厚塑磁有限公司 | Production technology and production line for flexible permanent magnetic film |
| CN104733173A (en) * | 2014-12-30 | 2015-06-24 | 东莞市美厚塑磁有限公司 | High-performance halogen-free flexible magnetic sheet preparation method and production line |
| CN105295780A (en) * | 2015-11-24 | 2016-02-03 | 三友（天津）高分子技术有限公司 | Magnetic butyl hot melt adhesive and production method thereof |
| CN105295780B (en) * | 2015-11-24 | 2017-03-22 | 三友（天津）高分子技术有限公司 | Magnetic butyl hot melt adhesive and production method thereof |
| CN112331473A (en) * | 2020-11-23 | 2021-02-05 | 横店集团东磁股份有限公司 | Trapezoidal rubber-plastic extruded neodymium-iron-boron magnetic strip and preparation method thereof |
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| CN117133521A (en) * | 2023-10-19 | 2023-11-28 | 北京中科三环高技术股份有限公司 | Flexible magnet and preparation method thereof |
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Address after: 511300, No. three, No. 8, Zeng Jiang Street, Zengcheng, Guangdong, Guangzhou Patentee after: Guangzhou Golden South Plastic Magnet Co., Ltd. Address before: 510640 Guangdong city of Guangzhou province Tianhe District Wushan Guangdong province iron and Steel Institute Patentee before: Guangzhou Golden South Plastic Magnet Co., Ltd. |
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Effective date of registration: 20190123 Address after: 511300 No. 8 Zengjiang Street Jingsan Road, Guangzhou City, Guangdong Province Patentee after: Guangzhou Golden South Magnetic Material Co., Ltd. Address before: 511300 Zengjiang Street, Zengcheng, Guangzhou City, Guangdong Province, No. 8 Jingsan Road Patentee before: Guangzhou Golden South Plastic Magnet Co., Ltd. |
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