CN102324298A - Production method of coarsening membrane for extra-high voltage electrical network matching capacitor - Google Patents
Production method of coarsening membrane for extra-high voltage electrical network matching capacitor Download PDFInfo
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- CN102324298A CN102324298A CN 201110255489 CN201110255489A CN102324298A CN 102324298 A CN102324298 A CN 102324298A CN 201110255489 CN201110255489 CN 201110255489 CN 201110255489 A CN201110255489 A CN 201110255489A CN 102324298 A CN102324298 A CN 102324298A
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Abstract
The invention discloses a production method of a coarsening membrane for an extra-high voltage electrical network matching capacitor. A main process flow is as follows: preheating, plasticizing extrusion, pressure control, metering output, extruder die head, cooling moulding, vertical stretching preheating, vertical stretching, transverse stretching preheating, transverse stretching and heat processing. An X-ray diffraction instrument is utilized to analyze beta crystal quantity generated by cold rolling and hot melt conversion alpha crystal state of a thick sheet, a scanning electron microscope is utilized to observe a coarsening form of a coarsening membrane, and appropriate temperature of processing zone of preheating, plasticizing extrusion, thick sheet moulding, thick sheet preheating, vertical stretching, transverse stretching, heat treatment and the like, and vertical and transverse stretching rates and ratios are selected. Thickness of the coarsening membrane is in a micron grade, and thickness uniform consistency is good; the coarsening membrane has good dipping performance and has good compatibility with capacitor insulating oil; the coarsening membrane has excellent electrical performance and mechanical performance.
Description
Technical field
The invention belongs to electronics and insulating material manufacturing technology field, be specifically related to crystallization and the crystallization conversion thereof of processing, the high polymer of polypropylene high molecular polymer, the new method for producing of biaxial tension technical matters.
Background technology
China is vast in territory, energy skewness, and mass energy need be through the conveying of long distance.Aspect remote, large capacity transmission; The extra-high voltage grid power transmission engineering has high cost performance; Meet the developing direction that China builds a conservation-minded society, have vast potential for future development, building extra-high voltage grid is the Basic Ways that China optimizes allocation of resources and readjusts the energy structure.China's productivity development level regional disparity is very big, and primary energy distributes seriously unbalanced.Energy demand mainly concentrates on east and area that are fairly developed economically, middle part, accounts for about 3/4 of total demand; Coal that is used to generate electricity and hydropower resources mainly are distributed in western part and northern territory.The unbalance condition of source distribution of this ability and consumption has determined energy resources to distribute rationally in China; With big coal electricity base, big water power base is support; Realization coal electricity is changed and the water power large-scale development on the spot; And through build extra-high voltage grid realize trans-regional, stride the basin two things diametrically opposed to each other, will clean electric energy and be transported to area, the central and east on a large scale from western part and the north.Show according to China Power net data, after extra-high voltage grid builds up, can practice thrift 2,000 ten thousand kilowatts of generating sets, can reduce 2,000 ten thousand tons in generating consumption coal every year.Electric network reconstruction, long miniaturization apart from electric power transfer and city power transformating and supplying facility; Need a large amount of electric power facility construction and the update of power equipment; Aspect remote, large capacity transmission; Capacitor gets into rapid growth period with alligatoring film demand, and China's power grid construction Power Capacitors demand compound growth rate has surpassed 35% during " 12 ".
High-voltage power capacitor is because its technology and handling characteristics; Require polypropylene film not only higher breakdown voltage value will be arranged; Also require the surface to have certain roughness simultaneously,, utilize capacitor oil can be immersed in capacitor element fuse inside fully to adapt to power capacitor immersion oil performance demands; Get rid of residual gas in the fuse, guarantee good thermal diffusivity and the electrical insulating property of capacitor.Surface roughness is little, and when voidage hour, puncture voltage improves, but the needs of immersion oil can not satisfy capacitor and make the time; Surface roughness is big; When voidage is big; The needs of immersion oil in the time of satisfying the capacitor manufacturing; But the puncture voltage of capacitor can descend, and electric weakness increases, and therefore making these two performance index of polypropylene coarse film need reach a balance (being the performance index that puncture voltage and surface roughness satisfy the capacitor requirement simultaneously).
The capacitor of prior art adopts the method production of flat two-way twice stretching of embrane method mostly with the alligatoring film; Promptly for the polypropylene of high isotactic; Through controlling the chilling temperature of its melt, produce the brilliant and β crystalline substance of α on the sheet surface of moulding, make the β crystalline substance change into the α crystalline substance when being drawn into film at a certain temperature then; Because the density of β crystal is greater than the density of alpha-crystal; Therefore after the β crystal changes into alpha-crystal, form a large amount of fine and closely woven and concavo-convex rough surfaces that be interconnected on the surface of film, thereby the capacitor that has formed alligatoring is with polypropylene film (abbreviation alligatoring film).The main technique method of current alligatoring film production is: 220 ℃～230 ℃ of melt extrusion temperatures; 95 ℃～110 ℃ of sharp cooling roll temperature; 90 ℃～100 ℃ of heating air knife temperature; Longitudinal stretching was than 4.8: 1～5: 1; 150 ℃～155 ℃ of longitudinal stretching temperature; Cross directional stretch was than 8: 1; 150 ℃～155 ℃ of cross directional stretch temperature.
But adopt alligatoring film that the method produces in the general requirement with international standard that all can only be up to state standards of performance index such as puncture voltage and electric weakness; Cause the alligatoring structure of film inhomogeneous easily; Form main matsurface and time matsurface, and very big for the alligatoring film thickness in micron-sized adjustment difficulty; Therefore, the alligatoring film product quality and performances of utilizing prior art to produce are relatively poor, are difficult to satisfy the requirement of power capacitor indexs such as puncture voltage, electric weakness under high-voltage strength.
Summary of the invention
Because the matched capacitor of extra-high voltage grid requires loss little; Specific characteristic is good; Temperature rise is low, reliability is high, the life-span is long, and the material that therefore satisfies the supporting capacitor manufacturing of extra-high voltage grid must reach the specification requirement that thickness evenness is good, percent thermal shrinkage is low, electrical strength is high and electric weakness is few.
The present invention is in order to overcome the existing defective of alligatoring film of the prior art, a kind of technology maturation, practical, reliable and stable to be provided, can realizing the production method of the supporting capacitor of large-scale continuous production extra-high voltage grid with the alligatoring film.
The present invention solves the employed technical scheme that has problems in the prior art: the supporting capacitor of a kind of extra-high voltage grid is with the production method of alligatoring film; Production procedure is: preheating, plasticizing are extruded, pressure is controlled, measure output, extruder die head, cooling forming, longitudinal stretching preheating, longitudinal stretching, cross directional stretch preheating, cross directional stretch, heat treatment, and concrete step is:
(1) the polypropylene raw material get into the plasticizing of plasticizing extruder heat fused and extrude through preheating;
(2) under certain pressure control, by measuring pump control extrusion capacity output polypropylene fusion fluid;
(3) the polypropylene fusion fluid is through the T die output melt polypropylene of extruder, and melt polypropylene makes sheet through the rapid cooling forming of casting sheet air knife of sharp cooling roll and heating, and sheet has generated a large amount of β crystalline solid;
(4) get into the longitudinal stretching warm-up phase, the β crystalline solid melts gradually, and bigger sphaerocrystal occurs; When the longitudinal stretching stage began, the β crystalline solid was converted into the α crystalline solid fully, became film through sheet behind the longitudinal stretching; The film surface cracking, the rough surface of formation variform;
(5) get into the cross directional stretch warm-up phase, melt on the surperficial aspect of film and post the alligatoring line, behind cross directional stretch, be formed with the film of the thick decorative pattern of arcuation;
(6) heat treatment behind the cross directional stretch makes molten fully the subsides well of alligatoring line of film, and the alligatoring line is fine and closely woven evenly.
As the further design to the aforementioned techniques scheme: aforesaid extruder die head temperature is 230 ℃～250 ℃, and the temperature of extruder is arranged on 230 ℃～260 ℃; The surface temperature of sharp cooling roll is 80 ℃～95 ℃, and the casting sheet air knife temperature of heating is 60 ℃～90 ℃; The temperature of longitudinal stretching warm-up phase is 90 ℃～110 ℃, and sheet forms film through 5～7 times longitudinal stretching; The temperature of cross directional stretch warm-up phase is 155 ℃～175 ℃, and film is through 6～8 times cross directional stretch, and film surface forms the alligatoring line of arcuation; Heat treated temperature is 165 ℃～180 ℃.Extruder temperature is arranged on 230 ℃～260 ℃, and extruder die head temperature is arranged on 230 ℃～250 ℃, guarantees the abundant fusion of polypropylene granules, evenly flow to sharp cooling roll.The sharp cooling roll temperature is arranged on 80 ℃～95 ℃, and the casting sheet air knife temperature of heating is arranged on 60 ℃～90 ℃, and this moment, sheet generated a large amount of β crystalline solid (crystallization generation); When the longitudinal stretching preheating, the β crystalline solid is hot melt progressively, when longitudinal stretching begins; β crystalline solid all disappear (crystallization hot melt); The β crystalline solid all is converted into α crystalline solid (crystallization conversion), and film surface ftractures, and forms the rough surface of multiple form; Molten then being attached on the subsurface becomes the alligatoring line of arcuation behind cross directional stretch.Sheet is the key of decision film alligatoring line density in the β crystalline solid quantity that cold roller surface forms.Warm-up phase before the longitudinal stretching can make the β crystalline solid further perfect, even bigger sphaerocrystal occurs, helps subsequent handling and forms the alligatoring line.
After accomplishing above-mentioned production process, the alligatoring film just gets into follow-up technology of the package, comprises warehouse-in, packing, step such as checks and cut at last, and this technology of the package is known for everybody.
When melt polypropylene cools off rapidly on the sharp cooling roll surface; Surface temperature is a dynamic process; Higher than sharp cooling roll surface temperature, factors such as the temperature the when generation of β crystalline solid is extruded with extrusion die, sharp cooling roll surface temperature, casting sheet air knife air pressure, casting sheet air knife tolerance and casting sheet air knife temperature, material pace, material thickness are all relevant.
In the crystal of synthetic high polymer, strand is taked the conformation that relatively stretches usually.Polypropylene is the macromolecular chain that has than large-substituent, takes helical conformation, when in crystal, closely piling up, takes main chain central shaft mode parallel to each other to arrange, in case the macromolecule crystallization, the conformation that is arranged in the macromolecular chain in the crystalline phase just no longer changes.The symmetry of substituted radical directly influences the crystallization of film in the high-polymer molecular, for this reason, as improving the degree of crystallinity of polypropylene film, at first will improve the isotacticity of raw material.The molecular structure of high polymer be can crystallization basic reason, but can high polymer realize crystallization, also certain external condition must be arranged.Desire to make crystallization process spontaneously to carry out, the free energy of system must reduce, i.e. Δ G=Δ G crystalline substance-Δ G amorphous＜0.According to the superpolymer crystal process analysis procedure analysis, the external condition of impact polymer crystallization has two: 1) temperature: when polymer temperature during near fusing point Tm, the segment diffusion mobility is easy, and nucleus forms difficulty, and nucleation rate is little; When temperature during near vitrification point Tg, nucleation rate is big, and strand diffuses into the lattice difficulty, and crystal growth is slow.The general temperature that a maximum crystalline rate is arranged between Tm and Tg, the relation of it and Tm is obeyed Tmax ≌ 0.85Tm roughly.2) stretch or stress orientation: in drawing process, the strand that originally curls extends, and its conformation significantly reduces, and the molecules align order improves, and the entropy S amorphous after the stretching is littler than the preceding entropy amorphous that stretches, and therefore, stretch orientation helps crystallization.
In addition; Film after the stretching is heat-treated (thermal finalization) under the situation of tensioning; Promptly be higher than draft temperature; The a certain preference temperature (this process temperature is controlled at the temperature T max of the maximum crystalline rate of polymer, approaches the static crystallization processs of gentleness such as a kind of) that is lower than melting temperature is heat-treated to quicken polymer secondary crystallization or post crystallization process film.Heat treatment is a relaxation, can impel molecule segment quicken to reset improving degree of crystallinity and to make crystal structure be tending towards perfect through suitable heating (being generally several seconds), after be cooled to room temperature, the relative position of its interior molecules chain is difficult for being moved.And crystal (crystallite) similar " crosslinking points " has the effect that limits sub-chain motion in the polymer, and high-crystallinity crystallite density is higher, and the macromolecular chain amorphous fraction is shortened.
The present invention changes the α crystalline state through utilizing the x x ray diffractometer x to analyze sheet at β crystalline solid quantity and the hot melt thereof that cold roller generates; Utilize the alligatoring form of sem observation film; Choose that suitable preheating, plasticizing are extruded, each processing district temperature such as sheet moulding, sheet preheating, longitudinal stretching, cross directional stretch and heat treatment and in length and breadth to rate of extension, ratio, having formed a cover, to produce thickness be the good film production equipment of micron order, thickness uniformity consistency; The saturating machine of film is good, and with capacitor insulation oil good compatibility is arranged; Film has excellent electric property and mechanical performance etc., satisfies the manufacturing technique method of the alligatoring film of the supporting capacitor manufacturing technology requirement of extra-high voltage grid.
The supporting capacitor of extra-high voltage grid of the present invention uses the technology key point of alligatoring film production technology to be:
(1) thickness evenness of film control
After the preheating of polypropylene raw material; Through plasticizing extruder, pressure stable control, accurate measuring pump flow control; Evenly be cast to the sharp cooling roll cooling forming at the extruder die head, longitudinal stretching, cross directional stretch and heat treatment, overall process is by online thickness measure and control computer monitoring, adjustment; Guaranteed the thickness evenness of film effectively, the film thickness tolerance can reach ± 2% (μ m).
(2) typing of sheet
The thermal capacity of sharp cooling roll is bigger, and heat conduction is good, and temperature fluctuation is generally little, so the sharp cooling roll variations in temperature causes the less likely that the alligatoring line changes.Increase the standout and the stereovision of alligatoring line; Except that major control sharp cooling roll temperature; Air pressure, throughput, the temperature of the casting sheet air knife above the sharp cooling roll must be controlled; And the leading portion heating roller temperature of longitudinal stretching preheating slightly improves 1～5 ℃, sphaerocrystal is increased and strengthens the alligatoring effect.Factors such as the temperature the when generation of β crystalline solid is extruded with the extruder die head, sharp cooling roll surface temperature, casting sheet air knife air pressure, casting sheet air knife tolerance and casting sheet air knife temperature, material pace, material thickness are all relevant.
(3) preheat temperature and longitudinal stretching temperature before the longitudinal stretching
The β crystalline solid of film surface is converted into the α crystalline solid, and when the longitudinal stretching preheating, the β crystalline solid is hot melt progressively, and when longitudinal stretching began, the β crystalline solid all disappeared.Warm-up phase before the longitudinal stretching, can make the β crystalline solid further perfect early stage, even bigger sphaerocrystal occurs, helps subsequent handling and form the alligatoring line.When longitudinal stretching began, the β crystalline solid all was converted into the α crystalline solid, and film surface ftractures, and formed the rough surface of multiple form, if draft temperature is too low, the fusing of β crystalline solid is poor, and the crystalline state number turnover of generation is low, the alligatoring poor morphology of film; If draft temperature is too high, the polypropylene molecular chain place creep ruptures and rupture of membranes easily, can't ordinary production.
(4) heat setting temperature confirms
Roughness and voidage determination data from film; In conjunction with the alligatoring line density of electron microscope observation and the outstanding form of alligatoring line; The temperature and time of cross directional stretch after-baking degree has significant effects to the performance of film; Film alligatoring line is molten to be pasted well, and the alligatoring line is fine and closely woven evenly, and higher, the electric weakness of the dielectric strength of film is few.But to prevent that also heat treatment from excessively forming ball.The dielectric strength mean value of film can reach>=540 MV/m among the present invention, minimum>=450 MV/m; Electricity weakness number≤0.15/m2.
(5) the vertical and horizontal draw ratio confirms
Film is in drawing process, and the strand that originally curls extends, and its three-dimensional conformation reduces, and the molecules align order improves, and stretching makes molecularly oriented and helps crystallization.Film after the stretching is heat-treated under the situation of tensioning; The secondary crystallization or the post crystallization process of film have been quickened; Impel molecule segment quicken to reset improving degree of crystallinity and to make crystal structure be tending towards perfect, after be cooled to room temperature, the relative position of its interior molecules chain is difficult for being moved.Through the film that fully stretches, its mechanical performance improves.The percent thermal shrinkage of film vertically≤4%, laterally≤2%.
In sum; The supporting capacitor of extra-high voltage grid of the present invention is compared with the technical indicator of alligatoring film with GB/T13542.3-2006 and GB/T12802-1996 institute proposition capacitor with the production method of alligatoring film, utilizes the technical performance indexs such as thickness deviation, percent thermal shrinkage, electrical strength and electric weakness of the film that the inventive method produces be greatly improved (seeing the following form 1).Technology maturation of the present invention, practical, reliable and stable.
The supporting capacitor of table 1 12～14 μ m extra-high voltage grids is with alligatoring membrane technology index situation
In sum; Because capacitor requires loss little; Specific characteristic is good; Temperature rise is low, reliability is high, the life-span is long, and the alligatoring film that the alligatoring film that therefore utilizes alligatoring film production method of the present invention to make can satisfy the supporting capacitor manufacturing of extra-high voltage grid must reach the specification requirement that thickness evenness is good, percent thermal shrinkage is low, electrical strength is high and electric weakness is few, the manufacturing process technology maturation of this alligatoring film, practical, reliable and stable; Can realize that can produce thickness is the good alligatoring film of micron order, thickness uniformity consistency on a large scale continuously; The saturating machine of prepared alligatoring film is good, and with capacitor insulation oil good compatibility is arranged; The alligatoring film has excellent electric property and mechanical performance etc.
Description of drawings
Fig. 1 is the flow sheet of the supporting capacitor of extra-high voltage grid of the present invention with the production method of alligatoring film.
Embodiment
Embodiment 1
The supporting capacitor of the embodiment of the invention 1 described a kind of extra-high voltage grid is with the production method of alligatoring film; As shown in Figure 1; Production procedure is: preheating, plasticizing are extruded, pressure is controlled, measure output, extruder die head, cooling forming, longitudinal stretching preheating, longitudinal stretching, cross directional stretch preheating, cross directional stretch, heat treatment, and concrete step is:
(1) the polypropylene raw material get into the plasticizing of plasticizing extruder heat fused and extrude through preheating;
(2) under certain pressure control, by measuring pump control extrusion capacity output polypropylene fusion fluid;
(3) the polypropylene fusion fluid is through the T die output melt polypropylene of extruder, and melt polypropylene makes sheet through the rapid cooling forming of casting sheet air knife of sharp cooling roll and heating, and sheet has generated a large amount of β crystalline solid;
(4) get into the longitudinal stretching warm-up phase, the β crystalline solid melts gradually, and bigger sphaerocrystal occurs; When the longitudinal stretching stage began, the β crystalline solid was converted into the α crystalline solid fully, became film through sheet behind the longitudinal stretching; The film surface cracking, the rough surface of formation variform;
(5) get into the cross directional stretch warm-up phase, melt on the surperficial aspect of film and post the alligatoring line, behind cross directional stretch, be formed with the film of the thick decorative pattern of arcuation;
(6) heat treatment behind the cross directional stretch makes molten fully the subsides well of alligatoring line of film, and the alligatoring line is fine and closely woven evenly.
Aforesaid extruder die head temperature is 230 ℃～250 ℃, and the temperature of extruder is arranged on 230 ℃～260 ℃; The surface temperature of sharp cooling roll is 80 ℃～95 ℃, and the casting sheet air knife temperature of heating is 60 ℃～90 ℃; The temperature of longitudinal stretching warm-up phase is 90 ℃～110 ℃, and sheet forms film through 5～7 times longitudinal stretching; The temperature of cross directional stretch warm-up phase is 155 ℃～175 ℃, and film is through 6～8 times cross directional stretch, and film surface forms the alligatoring line of arcuation; Heat treated temperature is 165 ℃～180 ℃.
The supporting capacitor of the described extra-high voltage grid of present embodiment is with the production method of alligatoring film, and the alligatoring membrane technology content of being produced is high.Utilize the alligatoring form of sem observation film surface, reached comparatively ideal effect.
Wherein indexs such as the thickness evenness of film, electric weakness and electrical strength thereof all require to be greatly improved (is example with 12～14 μ m products) as shown in the table than the desired value of existing national standard
The above only is preferred embodiment of the present invention, is not technology contents of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (2)
1. the supporting capacitor of extra-high voltage grid is with the production method of alligatoring film, and it is characterized in that: described production procedure is:
Preheating, plasticizing are extruded, pressure is controlled, measure output, extruder die head, cooling forming, longitudinal stretching preheating, longitudinal stretching, cross directional stretch preheating, cross directional stretch, heat treatment, and concrete step is:
The polypropylene raw material get into the plasticizing of plasticizing extruder heat fused and extrude through preheating;
Under certain pressure control, by measuring pump control extrusion capacity output polypropylene fusion fluid;
The polypropylene fusion fluid is through the T die output melt polypropylene of extruder, and melt polypropylene makes sheet through the rapid cooling forming of casting sheet air knife of sharp cooling roll and heating, and sheet has generated a large amount of β crystalline solid;
Get into the longitudinal stretching warm-up phase, the β crystalline solid melts gradually, and bigger sphaerocrystal occurs; When the longitudinal stretching stage began, the β crystalline solid was converted into the α crystalline solid fully, became film through sheet behind the longitudinal stretching; The film surface cracking, the rough surface of formation variform;
Get into the cross directional stretch warm-up phase, melt on the surperficial aspect of film and post the alligatoring line, behind cross directional stretch, be formed with the film of the thick decorative pattern of arcuation;
Heat treatment behind the cross directional stretch makes the molten fully subsides of the alligatoring line of film good, and the alligatoring line is fine and closely woven evenly.
2. alligatoring film production method according to claim 1 is characterized in that: described extruder die head temperature is 230 ℃～250 ℃, and the temperature of extruder is arranged on 230 ℃～260 ℃; The surface temperature of sharp cooling roll is 80 ℃～95 ℃, and the casting sheet air knife temperature of heating is 60 ℃～90 ℃; The temperature of longitudinal stretching warm-up phase is 90 ℃～110 ℃, and sheet forms film through 5～7 times longitudinal stretching; The temperature of cross directional stretch warm-up phase is 155 ℃～175 ℃, and film is through 6～8 times cross directional stretch, and film surface forms the alligatoring line of arcuation; Heat treated temperature is 165 ℃～180 ℃.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137325A (en) * | 2013-01-28 | 2013-06-05 | 宁波大东南万象科技有限公司 | Roughening membrane preparation method of capacitor capable of operating in super-high-voltage power grid for long time |
| CN103177874A (en) * | 2013-01-28 | 2013-06-26 | 宁波绿海电子材料有限公司 | Preparation method of rough films used for microwave oven capacitors |
| CN112873670A (en) * | 2020-12-23 | 2021-06-01 | 天津大学 | Polypropylene film insulation characteristic improving method based on crystallization morphology regulation and control |
| CN113960159A (en) * | 2021-09-13 | 2022-01-21 | 中国电力科学研究院有限公司 | Power-resistant performance testing device and testing method |
| CN114015151A (en) * | 2021-10-28 | 2022-02-08 | 安徽飞达电气科技有限公司 | Polypropylene capacitor film with high breakdown voltage |
| CN116118140A (en) * | 2023-04-04 | 2023-05-16 | 河北海伟电子新材料科技股份有限公司 | BOPP film, metallized film, capacitor, preparation method and application |
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2011
- 2011-09-01 CN CN 201110255489 patent/CN102324298A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 《电力电容器与无功补偿》 20080430 王晓云 等 《双向拉伸聚丙烯粗化膜工艺研究》 第29卷, 第2期 * |
| 《绝缘材料》 20061231 孙桂成 《双向拉伸聚丙烯薄膜双面粗化的工艺研究》 第39卷, 第4期 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137325A (en) * | 2013-01-28 | 2013-06-05 | 宁波大东南万象科技有限公司 | Roughening membrane preparation method of capacitor capable of operating in super-high-voltage power grid for long time |
| CN103177874A (en) * | 2013-01-28 | 2013-06-26 | 宁波绿海电子材料有限公司 | Preparation method of rough films used for microwave oven capacitors |
| CN103137325B (en) * | 2013-01-28 | 2016-01-20 | 宁波大东南万象科技有限公司 | The capacitor coarse thin film preparation method on extra-high voltage grid can be run on for a long time |
| CN112873670A (en) * | 2020-12-23 | 2021-06-01 | 天津大学 | Polypropylene film insulation characteristic improving method based on crystallization morphology regulation and control |
| CN113960159A (en) * | 2021-09-13 | 2022-01-21 | 中国电力科学研究院有限公司 | Power-resistant performance testing device and testing method |
| CN114015151A (en) * | 2021-10-28 | 2022-02-08 | 安徽飞达电气科技有限公司 | Polypropylene capacitor film with high breakdown voltage |
| CN116118140A (en) * | 2023-04-04 | 2023-05-16 | 河北海伟电子新材料科技股份有限公司 | BOPP film, metallized film, capacitor, preparation method and application |
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Application publication date: 20120118 |