CN110085422A - A kind of plastic film of high dielectric constant - Google Patents
A kind of plastic film of high dielectric constant Download PDFInfo
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- CN110085422A CN110085422A CN201910395996.3A CN201910395996A CN110085422A CN 110085422 A CN110085422 A CN 110085422A CN 201910395996 A CN201910395996 A CN 201910395996A CN 110085422 A CN110085422 A CN 110085422A
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- film
- dielectric constant
- tantalum oxide
- plastic film
- high dielectric
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- 239000002985 plastic film Substances 0.000 title claims abstract description 43
- 229920006255 plastic film Polymers 0.000 title claims abstract description 43
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910001936 tantalum oxide Inorganic materials 0.000 claims abstract description 67
- 239000004033 plastic Substances 0.000 claims abstract description 57
- 229920003023 plastic Polymers 0.000 claims abstract description 57
- -1 polypropylene Polymers 0.000 claims description 38
- 239000004743 Polypropylene Substances 0.000 claims description 37
- 229920001155 polypropylene Polymers 0.000 claims description 37
- 229920000728 polyester Polymers 0.000 claims description 23
- 229910052715 tantalum Inorganic materials 0.000 claims description 9
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 229920002223 polystyrene Polymers 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 49
- 238000009434 installation Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 60
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 12
- 239000003989 dielectric material Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 239000011104 metalized film Substances 0.000 description 9
- 238000004804 winding Methods 0.000 description 9
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052809 inorganic oxide Inorganic materials 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000484 niobium oxide Inorganic materials 0.000 description 4
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- 239000003985 ceramic capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- OWYGZENDPUIOCD-UHFFFAOYSA-N niobium(5+) oxygen(2-) tantalum(5+) Chemical compound [O-2].[Ta+5].[O-2].[Nb+5] OWYGZENDPUIOCD-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/32—Wound capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/33—Thin- or thick-film capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
The present invention relates to a kind of plastic film of high dielectric constant, it includes a kind of organic plastics film and tantalum oxide.Tantalum oxide is evenly affixed on organic plastics film or among organic plastics film with nanoscale regime, and organic plastics film is the attachment carrier of tantalum oxide；Tantalum oxide volume ratio content is 10%-55%.Due to the high dielectric constant of tantalum oxide, so that the dielectric constant of plastic film is highly improved, the plastic film of high dielectric constant is formed.Using the plastic sheeting making capacitor of this high dielectric constant, in the unfailing performance for obtaining plastic film capacitor, the volume of organic film condenser can be greatly reduced, reduces the installation space of product, and reduces product cost.
Description
Technical field
The present invention relates to capacitor plastic film, especially a kind of plastic film of high dielectric constant.
Background technique
Presently used capacitor is mainly organic film condenser, electrolytic capacitor, ceramic capacitor three categories capacitor.
Organic film condenser has that temperature range is wide, high pressure resistant, dielectric loss is small, performance is stable, the service life is long, reliability height etc. is excellent
Point, but small product size is big.Electrolytic capacitor has the characteristics that small in size, capacity is big, at low cost, but product it is resistance to force down, be lost it is big,
Service life is short.Ceramic capacitor volume is small, good insulating, but capacity is smaller, loss is big, and stability is poor.It is right with social development
Reliability, stability and the small product size of capacitor product require higher and higher.In particular with the quick hair of new-energy automobile
Exhibition, further promotes capacitor requirement, it is desirable that large capacity, properties of product are reliable and stable, and to reduce small product size and weight.
The capacitor of suitable new-energy automobile is all made of organic film condenser at present, although performance is met the requirements, there are product bodies
Product is big, the disadvantage of weight weight.
Stable, the more common capacitor dielectric material of performance is polypropylene film at present.Properties of Polypropylene is stablized, water absorption rate
Low (0.01%), crystallinity is high, compound with regular structure, has excellent mechanical property, and have good heat resistance, chemical stabilization
The excellent performances such as property, electrical property, weatherability, are the capacitor dielectric materials being widely used at present.Polypropylene for capacitor
The dielectric strength of film is up to 400V/ μm or more, and dielectric dissipation factor is smaller, and only 0.0002, it is very suitable to production capacitor
Device.But since polypropylene plastics dielectric constant is smaller, dielectric constant only has 2.2, and the capacitor volume of production is larger.And capacitor
Tantalum electrolytic capacitor medium in industry is tantalum oxide, and the stable chemical performance of tantalum-oxide film, loss factor is small compared with aluminium oxide, and
And temperature stability is good, and dielectric constant is bigger than aluminium oxide, and usually 28, thus small product size very little, and electrical performance is steady
It is fixed.But because its dielectric strength is smaller, DC low-voltage capacitor (usually only ten volts or so) can only be made.Make high pressure tantalum electricity
Electrolysis condenser then can only cause product capacity to reduce by internal series-connection form, but in this way, and volume increases, even if such product
Voltage also can only achieve 300Vdc or so, seriously limit the voltage use scope of product.
Summary of the invention
The purpose of the present invention is to provide a kind of plastic films of high dielectric constant, mainly solve existing organic plastics film
The disadvantage that capacitor volume is big, weight is heavy is thin obtaining plastics using the plastic sheeting making capacitor of this high dielectric constant
When the unfailing performance of membrane capacitance, the volume of organic film condenser can be greatly reduced, reduces the installation space of product, and drop
Low product cost.
To achieve the above object, the invention is realized in this way.
A kind of plastic film of high dielectric constant, it includes a kind of organic plastics film and tantalum oxide.It is characterized by: oxygen
Change tantalum to be evenly affixed on organic plastics film with nanoscale regime, organic plastics film is the attachment carrier of tantalum oxide；Oxidation
Tantalum volume ratio content is 10%-55%.
The plastic film of the high dielectric constant, it is characterised in that: the organic plastics film is polypropylene or gathers
Tetrafluoroethene or polystyrene apolar medium.
The plastic film of the high dielectric constant, it is characterised in that: the organic plastics film is polyester or poly- carbon
Acid esters or polyphenylene sulfide polarizable medium.
The plastic film of the high dielectric constant, it is characterised in that: the organic plastics film is polypropylene, oxidation
The preferred 20%-40% of tantalum volume ratio content.
The plastic film of the high dielectric constant, it is characterised in that: further include phase between organic plastics film and tantalum oxide
Hold agent.
The plastic film of the high dielectric constant, it is characterised in that: another layer of organic plastics film is covered on tantalum oxide,
Tantalum oxide volume ratio content is 10%-55%.
By above structure, the present invention has following superior technical effect.
Product of the present invention, which is used, is uniformly distributed in function admirable for inorganic oxide-tantalum oxide of high dielectric constant
On organic plastics film or among plastic film, the temperature range that product has taken into account organic plastics film is wide, high pressure resistant, medium damages
It consumes that small, performance is stable, the service life is long, high reliability, while improving the dielectric constant of plastic film, can make to use this
The volume of capacitor made of plastic film greatly reduces.
1, the dielectric constant of capacitor product size and medium is closely related, and polypropylene plastics dielectric constant is smaller,
Dielectric constant only has 2.2, and the capacitor volume of production is larger.And tantalum oxide dielectric constant is 28, much larger than capacitor plastics
The dielectric constant of medium.The tantalum oxide of volume ratio 10% -55% is uniformly distributed in polypropylene plastics, it can be by polypropylene plastics
The dielectric constant of material promotes 10% or more, can effectively reduce the volume of capacitor.
2, nanoscale tantalum oxide is uniformly distributed in polypropylene plastics, it is same in the dielectric constant for promoting polypropylene plastics
When, tantalum oxide polyacrylic film is made using the stable electrical property of polypropylene and mechanical performance, is reducing small product size
Meanwhile meeting product pressure resistance demand, it can be made into that pressure resistance is several hundred, even several kilovolts of capacitor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.
In figure: 1- organic plastics film；2- tantalum oxide；3- organic plastics film
Specific embodiment
A kind of plastic film of high dielectric constant, it includes a kind of plastic film 1 and a kind of tool with electrical insulation capability
The inorganic oxide for having good insulation preformance, dielectric constant big -- tantalum oxide 2.Tantalum oxide 2 has been evenly affixed to nanoscale regime
On machine plastic film 1, organic plastics film 1 is the attachment carrier of tantalum oxide 2；2 volume ratio content of tantalum oxide is 10%-55%.
According to products application environment, organic plastics film 1 can choose the apolar mediums such as polypropylene, polytetrafluoroethylene (PTFE), polystyrene,
Also polyester, polycarbonate, polyphenylene sulfide isopolarity medium may be selected.To increase the combination between organic plastics film 1 and tantalum oxide 2
Compatilizer can be added in production process in power.
The plastic film of production capacitor requires that big dielectric constant, resistance to temperature, performance are stable, dielectric strength is high and have certain
Elongation at break and tensile strength.The films such as polypropylene, polyester, polycarbonate used at present are suitable for making capacitors
's.Plastic film tensile strength > 35MPa, elongation at break > 30% are then required according to production technology, then according to product requirement
It is required that the electrical strength > 200V/ μm of plastic film.And the composite inorganic oxide on organic plastics film, then with compound ratio
The increasing of example, then the tensile strength of film, elongation at break are gradually reduced, and dielectric strength also can be with composite inorganic oxide ratio
Example number and be affected.Comprehensive items factor, tantalum oxide volume ratio content control within the scope of 10%-55%, make plastics
Tensile strength > 25MPa, elongation at break > 10%, the electrical strength > 150V/ μm of film, although particular product performance parameters index
More single plastic film is declined, but can meet requirement by the thickness of appropriate adjustment deielectric-coating, while because of film
Dielectric constant promoted, the comprehensive performance of product still has very big promotion.
In addition, different organic plastics, different inorganic oxide influence sizes also can be different.Table 1 is tantalum oxide, oxidation
The performance parameter table of three kinds of niobium, aluminium oxide inorganic oxides.The dielectric constant of niobium oxide is 41-48 as can be seen from Table 1,
The dielectric constant for changing material can be become apparent from than tantalum oxide using niobium oxide.But since the linear expansion coefficient of niobium oxide is compared with tantalum oxide
Greatly, product comprehensive performance is poor compared with niobium oxide, here preferred tantalum oxide.
The performance parameter table of 1 oxide of table
| Project | Tantalum oxide | Niobium oxide | Aluminium oxide |
| Molecular weight | 411.9 | 265.8 | 101.9 |
| Density (g/cm3) | 8.59~8.73 | 4.37~5.02 | 3.1~3.9 |
| Fusing point (DEG C) | 1470 | 1460 | 2040 |
| Dielectric constant | 27~28 | 41~48 | 9~10 |
| Linear expansion coefficient (× 10-6/℃) | 0.55 | 1.07 | 1.7 |
Referring to Fig. 1, it is the structural schematic diagram of the embodiment of the present invention 1.Organic plastics film 1 is used as carrier, using special
The tantalum oxide 2 (dielectric constant 28) of certain volume ratio is attached on organic plastics film 1 with equipment and special process.It is organic
Plastic film 1 and tantalum oxide 2 are that cascaded structure forms complex media tantalum oxide polyacrylic film.It can be pushed away according to following formula
Lead the dielectric constant for obtaining complex media tantalum oxide plastic film.
ε-complex media dielectric constant；
ε1-- the first dielectric constant of the dielectric material；
ε2-- second of dielectric constant of the dielectric material；
X1The volume fraction of-the first dielectric material；
X2-- the volume fraction of second of dielectric material；
Here have: X1+X2=1
It can be calculated the dielectric constant of composite material according to formula.Table 2 is tantalum oxide (dielectric constant 28), polypropylene
(dielectric constant 2.2) different volumes are than the dielectric constant and other parameters of complex media, and table 3 is tantalum oxide, (dielectric is normal for polyester
Number is 3.1) dielectric constant and other parameters of the different volumes than complex media.
2 tantalum oxide of table, polypropylene different volumes are than complex media parameter list
3 tantalum oxide of table, polyester different volumes are than complex media parameter list
Embodiment 1:
When producing polyacrylic film, polypropylene fusion is extruded into polypropylene board at 240 DEG C -260 DEG C,
Longitudinal stretching is carried out at 140 DEG C -160 DEG C, the tantalum oxide of volume ratio 5% is then coated on by polypropylene plastics by dedicated unit
On material, the carrier that cross directional stretch forms tantalum oxide in plastic film is carried out again later, and further pass through dedicated unit for volume
Tantalum oxide than 5% is coated on polypropylene plastics, forms the tantalum oxide polyacrylic film of volume ratio 10%.According to formula
It is 2.42 that dielectric constant, which is calculated, is the promotion 10% of more compound preceding polypropylene dielectric constant.
Plastic film passes through vacuum coating (vacuum evaporation metal layer) according to set requirements, capacitor gold is made in cutting
Then categoryization film is made capacitor body by winding, and capacitor element is further made.Using complex media tantalum oxide
The volume of capacitor body made of polyacrylic film is big compared with the volume of capacitor body made of polyacrylic film
It is big to reduce.Specific product volume reduces effect or less example explanation:
Capacitor body capacity: 200 μ F, metalized film specification: 3 μm of * 50mm, it is 1.5mm that coating materials, which stays hem width degree, and mandrel is straight
Diameter is 30mm, coating materials misalignment 1mm, and flattening fuse is made using no-induction winding.It is computed capacitor body size and volume:
Polypropylene metalized film: fuse is having a size of 51mm*29.18mm*76.28mm, volume 104204.8mm3
Complex media tantalum oxide polypropylene metalized film: fuse is having a size of 51mm*27.17mm*74.27mm, volume
94828.4mm3
Use the volume of fuse made of complex media tantalum oxide polypropylene metallizing film winding for using polypropylene metal
Change the 94828.2/104204.8*100%=91.0% of the volume for the fuse that film roll turns to, fuse volume reduces 9%.
Embodiment 2:
When producing polyester plastics film, polyester melt is extruded into polyester sheet at 270 DEG C -300 DEG C, 170 DEG C -
Longitudinal stretching is carried out at 200 DEG C, then the tantalum oxide of volume ratio 10% is coated on polyester plastics by dedicated unit, later
The carrier that cross directional stretch forms tantalum oxide in plastic film is carried out again, and further passes through dedicated unit for the oxygen of volume ratio 30%
Change tantalum to be coated on polyester plastics, forms the tantalum oxide polyester plastics film of volume ratio 40%.Dielectric is calculated according to formula
Constant is 4.81, is the promotion 55.2% of more compound preceding polyester dielectric constant.
Plastic film passes through vacuum coating (vacuum evaporation metal layer) according to set requirements, capacitor gold is made in cutting
Then categoryization film is made capacitor body by winding, and capacitor element is further made.Using complex media tantalum oxide
The volume of capacitor body made of polyester plastics film subtracts significantly compared with the volume of capacitor body made of polyester plastics film
It is small.Specific product volume reduces effect or less example explanation:
Capacitor body capacity: 200 μ F, metalized film specification: 3 μm of * 50mm, it is 1.5mm that coating materials, which stays hem width degree, and mandrel is straight
Diameter is 30mm, coating materials misalignment 1mm, and flattening fuse is made using no-induction winding.It is computed capacitor body size and volume:
Polyester metalized film: fuse is having a size of 51mm*22.49mm*69.59mm, volume 74252.4mm3
Complex media tantalum oxide polyester metalized film: fuse is having a size of 51mm*15.87mm*62.97mm, volume
48200.3mm3
Use the volume of fuse made of complex media tantalum oxide polypropylene metallizing film winding for using polypropylene metal
Change the 48200.3/74252.4*100%=64.9% of the volume for the fuse that film roll turns to, fuse volume reduces 35.1%.
Referring to Fig. 2, it is the structural schematic diagram of the embodiment of the present invention 2.(the load as tantalum oxide 2 of organic plastics film 1
Body, organic plastics film 3 are covered on tantalum oxide 2.Tantalum oxide is attached to by organic plastics using special equipment and special process
Among film 1 and organic plastics film 3.Organic plastics film 1, tantalum oxide 2, the formation cascaded structure of organic plastics film 3 are compound
Medium oxidizing tantalum plastic film.The dielectric constant of complex media tantalum oxide plastic film can be derived from according to following formula.
ε-complex media dielectric constant；
ε1-- the first dielectric constant of the dielectric material；
ε2-- second of dielectric constant of the dielectric material；
ε3-- the third dielectric constant of the dielectric material；
X1The volume fraction of-the first dielectric material；
X2-- the volume fraction of second of dielectric material；
X3-- the volume fraction of the third dielectric material；
Here have: X1+X2+X3=1
It can be calculated the dielectric constant of composite material according to formula.4 polyester of table (dielectric constant 3.1), tantalum oxide (are situated between
Electric constant be 28), three kinds of medium different volumes of polypropylene (dielectric constant 2.2) are than the dielectric constant of complex media and other ginsengs
Number.
4 polyester of table, tantalum oxide, polypropylene different volumes are than complex media parameter list
Embodiment 3:
Producing complex media plastic film constantly, polyester film and polypropylene film are in different station synchro-draw, so
Afterwards under the conditions of 120 DEG C -150 DEG C by dedicated unit by two kinds it is film adhered together, while in fitting process by certain body
The tantalum oxide of product ratio is coated among two kinds of films.If the volume ratio of polyester film, tantalum oxide, polypropylene film is 3:4:3,
It is 4.04 according to the dielectric constant that complex media is calculated in formula, promotes 30.3% for more compound preceding polyester dielectric constant, compared with
Compound preceding polypropylene dielectric constant promotes 83.6%.
Plastic film passes through vacuum coating (vacuum evaporation metal layer) according to set requirements, capacitor gold is made in cutting
Then categoryization film is made capacitor body by winding, and capacitor element is further made.Using complex media tantalum oxide
The volume of capacitor body made of plastic film is greatly reduced compared with the volume of capacitor body made of polyester plastics film.Tool
Body small product size reduces effect or less example explanation:
Capacitor body capacity: 300 μ F, metalized film specification: 3 μm of * 50mm, it is 1.5mm that coating materials, which stays hem width degree, and mandrel is straight
Diameter is 30mm, coating materials misalignment 1mm, and flattening fuse is made using no-induction winding.It is computed capacitor body size and volume:
Polyester metalized film: fuse is having a size of 51mm*30.57mm*77.67mm, volume 110857.9mm3
Complex media tantalum oxide polypropylene polyester metalized film: fuse is having a size of 51mm*25.05mm*72.15mm, volume
85310.2mm3
Use the volume of fuse made of complex media tantalum oxide polypropylene metallizing film winding for using polypropylene metal
Change the 85310.2/110857.9*100%=77.0% of the volume for the fuse that film roll turns to, fuse volume reduces 23.0%.
It is in summary only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention.It is i.e. all
Equivalent changes and modifications made by content according to scope of the present invention patent all should be technology scope of the invention.
Claims (6)
1. a kind of plastic film of high dielectric constant, it includes organic plastic film (1) and tantalum oxide (2)；It is characterized by: oxygen
Change tantalum (2) to be evenly affixed on organic plastics film (1) with nanoscale regime, organic plastics film (1) is the attached of tantalum oxide (2)
Carrier；Tantalum oxide (2) volume ratio content is 10%-55%.
2. the plastic film of high dielectric constant according to claim 1, it is characterised in that: the organic plastics film
It (1) is polypropylene or polytetrafluoroethylene (PTFE) or polystyrene apolar medium.
3. the plastic film of high dielectric constant according to claim 1, it is characterised in that: the organic plastics film
It (1) is polyester or polycarbonate or polyphenylene sulfide polarizable medium.
4. the plastic film of high dielectric constant according to claim 1, it is characterised in that: the organic plastics film
It (1) is polypropylene, tantalum oxide (2) preferred 20%-40% of volume ratio content.
5. the plastic film of high dielectric constant according to claim 1, it is characterised in that: organic plastics film (1) and oxygen
It further include compatilizer between change tantalum (2).
6. the plastic film of high dielectric constant described according to claim 1 or 2 or 3 or 4 or 5, it is characterised in that: tantalum oxide
(2) another layer of organic plastics film (3) is covered on, tantalum oxide (2) volume ratio content is 10%-55%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341558A (en) * | 2020-03-20 | 2020-06-26 | 清华大学 | Dielectric film and preparation method and application thereof |
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|---|---|---|---|---|
| CN103987766A (en) * | 2011-12-02 | 2014-08-13 | 沙特基础创新塑料Ip私人有限责任公司 | Coated polymer films |
| CN108281282A (en) * | 2017-12-29 | 2018-07-13 | 安徽铜峰电子股份有限公司 | Metallize complex media macromolecule membrane and its capacitor |
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2019
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103987766A (en) * | 2011-12-02 | 2014-08-13 | 沙特基础创新塑料Ip私人有限责任公司 | Coated polymer films |
| CN108281282A (en) * | 2017-12-29 | 2018-07-13 | 安徽铜峰电子股份有限公司 | Metallize complex media macromolecule membrane and its capacitor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341558A (en) * | 2020-03-20 | 2020-06-26 | 清华大学 | Dielectric film and preparation method and application thereof |
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