CN110684944A - Double-sided aluminum metalized polypropylene film, preparation method thereof and capacitor core - Google Patents
Double-sided aluminum metalized polypropylene film, preparation method thereof and capacitor core Download PDFInfo
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- CN110684944A CN110684944A CN201910930397.7A CN201910930397A CN110684944A CN 110684944 A CN110684944 A CN 110684944A CN 201910930397 A CN201910930397 A CN 201910930397A CN 110684944 A CN110684944 A CN 110684944A
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- -1 polypropylene Polymers 0.000 title claims abstract description 180
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 178
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 178
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 92
- 239000003990 capacitor Substances 0.000 title claims abstract description 42
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 238000007738 vacuum evaporation Methods 0.000 claims abstract description 22
- 239000010408 film Substances 0.000 claims description 182
- 238000000637 aluminium metallisation Methods 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 24
- 238000001704 evaporation Methods 0.000 claims description 23
- 230000008020 evaporation Effects 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 14
- 239000011265 semifinished product Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003851 corona treatment Methods 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 239000004411 aluminium Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000012788 optical film Substances 0.000 claims description 4
- 238000012805 post-processing Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012719 thermal polymerization Methods 0.000 abstract description 7
- 229920006267 polyester film Polymers 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 239000011104 metalized film Substances 0.000 description 5
- 238000007731 hot pressing Methods 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 4
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- 238000007906 compression Methods 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000011140 metalized polyester Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/02—Pretreatment of the material to be coated
- C23C14/021—Cleaning or etching treatments
- C23C14/022—Cleaning or etching treatments by means of bombardment with energetic particles or radiation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/20—Metallic material, boron or silicon on organic substrates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- 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
- H01G4/02—Gas or vapour dielectrics
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- 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
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Abstract
The invention relates to a double-sided aluminum metalized polypropylene film, a preparation method thereof and a capacitor core. A double-sided aluminum metallized polypropylene film comprises a polypropylene base film and two pairs of aluminum metallized layers; a preparation method of a double-sided aluminum metalized polypropylene film comprises the steps of first vacuum evaporation, corona of a non-corona surface, second vacuum evaporation and post-treatment; a capacitor core includes a pair of single-sided metallized polypropylene films, a polypropylene light film, and a double-sided aluminum metallized polypropylene film. The double-sided aluminum metalized polypropylene film has the advantage of improving the voltage resistance of the film; in addition, the preparation method has the advantages that the aluminum metalized layers are uniformly evaporated on the two surfaces of the polypropylene film; the capacitor core of the invention has the advantage of improving the thermal polymerization effect.
Description
Technical Field
The invention relates to the technical field of capacitors, in particular to a double-sided aluminum metalized polypropylene film, a preparation method thereof and a capacitor core.
Background
At present, the film capacitor market scale in China is small in whole, the film capacitor industry is developed rapidly in recent years, and particularly the downstream demand market is increased rapidly. In recent years, the system and the weight of the capacitor are reduced by 3-4 times, and meanwhile, the film plating technology and the cutting technology of a metallized film are improved, so that the development of film capacitance is greatly facilitated. In the field of double-sided evaporation metallized films, capacitors made of the films occupy more and more markets due to the advantages of small volume, large capacity, good stability, strong self-healing capability and the like. However, domestic enterprises are very concerned with the problems of great difficulty in coating and slitting processes, difficulty in controlling yield and the like. Therefore, in order to meet the market demand and the domestic demand for the development of thin film capacitors, it is necessary to develop a double-sided vapor-deposited metallized thin film having excellent performance.
The capacitor made of the common metallized film can not bear large current, the capacitor made of the metal foil can bear the large current but has no self-healing function, and the existing double-sided metallized polyester film on the market can bear larger current and has the self-healing function. In addition, because the polypropylene film has stronger dielectric strength and higher withstand voltage compared with the polyester film under the same thickness and environment. And the capacitor made of the polypropylene film has small dielectric loss. Therefore, the core double-sided metallized polyester film of the prior film capacitor is formed by overlapping and winding the single-sided metallized film and the light film.
However, because the polyester film and the polypropylene film have different physical properties, especially different thermal shrinkage ratios, if the three films are used to manufacture the capacitor core, the polyester film and the polypropylene film have poor thermal polymerization effect when the capacitor core is subjected to a hot-pressing process, which causes incompact compression between layers of the core, air exists between the films, oxidation of the acceleration metallization layer affects the performance and service life of the capacitor.
Therefore, if a double-sided vapor-deposited polypropylene film can be used instead of a double-sided vapor-deposited polyester film, all the substrates of the capacitor core are polypropylene films, the heat shrinkage ratio is the same, and the core is more effective in thermal polymerization at the time of hot pressing, which can solve the problem. Therefore, the market urgently needs to replace the double-sided vapor-deposited polyester film with the double-sided vapor-deposited polypropylene film.
Because the aluminum metallization layer is evaporated on the surface of the polypropylene, the surface of the polypropylene needs to be subjected to corona treatment, otherwise, the evaporated aluminum cannot be attached to the surface of the polypropylene film under a high vacuum condition. However, at present, manufacturers of polypropylene films for capacitors can only perform corona treatment on one side of the polypropylene film. Moreover, because the evaporated metal film layer is quite thin, how to uniformly evaporate the metal film layer is also a problem to be solved.
Disclosure of Invention
In view of the defects of the prior art, the first object of the present invention is to provide a double-sided aluminum metallized polypropylene film, which has the advantage of improving the voltage resistance of the film.
The second objective of the present invention is to provide a method for preparing a double-sided aluminum metalized polypropylene film, which solves the problem of depositing a layer of aluminum metalized layer on both sides of the polypropylene film, and has the advantage of uniformly depositing an aluminum metalized layer.
The third objective of the present invention is to provide a capacitor core, wherein each layer is made of polypropylene film, which has the advantage of improving the thermal polymerization effect.
In order to achieve the first object, the invention provides the following technical scheme:
a two-sided aluminium metallized polypropylene film is characterized in that: including the polypropylene base film, two surfaces of polypropylene base film all closely paste and are equipped with two aluminium metallization layers that set up side by side, same surface leave the limit in the middle of the strip interval formation between the aluminium metallization layer.
The invention is further configured to: the total thickness of the double-sided aluminum metallized polypropylene film is 4.6-5.0 μm; wherein the sheet resistance of the aluminum metallization layer is 1.0 omega/□ -2.0 omega/□.
The invention is further configured to: the width of the middle margin is 2.8mm-3.2 mm.
By adopting the technical scheme, the polypropylene base film is used for playing a role of a medium, the two aluminum metallization layers are used for conducting electricity and storing charges, and compared with a single metal layer or other metals, the charges stored in the aluminum metallization layer in unit area are increased, so that the storage capacity is high, and the voltage resistance is strong; meanwhile, the design of reserving edges in two sides is adopted, and the manufactured capacitor is equivalent to two capacitors which are connected in series, so that the voltage resistance of the capacitor is further improved.
In order to achieve the second object, the invention provides the following technical scheme:
a preparation method of a double-sided aluminum metalized polypropylene film is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1 first vacuum evaporation: carrying out vacuum evaporation treatment on the corona surface on one side of the polypropylene base film, and evaporating an aluminum metalized layer on the corona surface on one side of the polypropylene base film to obtain a single-side aluminum metalized polypropylene film;
s2 corona of non-corona surface: taking a single-side aluminum metallized polypropylene film, firstly carrying out plasma pretreatment on the non-corona surface of the polypropylene base film, then carrying out corona treatment on the non-corona surface on the other side, and processing the non-corona surface into a corona surface to obtain a semi-finished film;
s3 second vacuum evaporation: taking a semi-finished product film, carrying out vacuum evaporation treatment on the corona surface on the other side of the polypropylene base film, and evaporating an aluminum metalized layer on the corona surface on the other side of the polypropylene base film to obtain a double-sided aluminum metalized polypropylene film semi-finished product;
and S4 post-processing: and carrying out aging and slitting treatment on the semi-finished product of the double-sided aluminum metallized polypropylene film to obtain the double-sided aluminum metallized polypropylene film.
The invention is further configured to: in first vacuum evaporation plating and corona surface corona, all carry out following processing to the polypropylene base film in advance, install the polypropylene base film in vacuum environment, and vacuum is 4mbar-10 mbar.
The invention is further configured to: the vacuum evaporation treatment comprises the following steps of,
s1 oil spray screen: heating an oil pot and an oil baffle plate, wherein shielding oil is sprayed to the corona surface of the polypropylene base film at intervals by the oil pot, the shielding oil is attached to the corona surface of the polypropylene base film through the oil baffle plate, and the spraying width of the shielding oil is 2.8mm-3.2 mm;
s2 main roll cooling: opening a refrigerating device, controlling the temperature of a refrigerating main roller to be-15-10 ℃, and cooling the polypropylene base film through the refrigerating main roller;
s3 vacuum evaporation: heating the evaporation boat, wherein the aluminum wire evaporated on the evaporation boat is attached to the corona surface of the polypropylene base film, and an aluminum metallization layer is formed;
s4 releasing the vacuum: and closing the vacuum pump, and releasing the vacuum to ensure that the pressure of the vacuum winding chamber is equal to the atmospheric pressure.
The invention is further configured to: in the oil spraying screen belt step, the temperature of an oil can is 170 ℃, and the temperature of an oil baffle plate is 175 ℃.
The invention is further configured to: in the step of plasma pretreatment, a plasma generator is adopted to spray plasma jet to the corona-free surface of the polypropylene basal membrane, and the outlet temperature of a nozzle of the plasma generator is 250-350 ℃.
The invention is further configured to: the corona treatment step is specifically realized in a way that a mono-surface aluminum metallized polypropylene film passes through a space between polar plates with high voltage, and bombards the non-corona surface of a polypropylene base film by high voltage; wherein the bombardment intensity of the polar plate is 9.8 W.min/m-10.2 W.min/m.
By adopting the technical scheme, in order to ensure that the aluminum metalized layer can be smoothly and firmly attached to the corona-free surface of the polypropylene film, when the corona-free surface of the polypropylene film is subjected to evaporation coating, the corona-free surface of the polypropylene film is subjected to plasma pretreatment, so that gaseous aluminum can be smoothly attached to the corona-free surface of the polypropylene film; meanwhile, vacuum evaporation treatment is adopted, so that gaseous aluminum is deposited on the corona surface of the polypropylene film in a vacuum high-temperature environment, the obtained aluminum metalized layer is thin and uniform, the uniform metal film layer is also a guarantee of good capacitive performance, the capacity of a capacitor using the film is prevented from being different, the sizes of capacitor cores after winding are prevented from being different, and the purpose of evaporating aluminum metalized films on two surfaces of the polypropylene film is finally achieved.
In order to achieve the third object, the invention provides the following technical solutions:
a capacitor core comprises a pair of single-sided metalized polypropylene films arranged side by side, a polypropylene light film arranged between the single-sided metalized polypropylene films and a double-sided aluminum metalized polypropylene film.
Through adopting above-mentioned technical scheme, adopt two-sided aluminium metallized polypropylene film and single face metallized polypropylene film and the cooperation of polypropylene membrane to wind when the condenser core is convoluteed, then three kinds of films all are the polypropylene film material, and the thermal contraction ratio is close, and when condenser core hot pressing, the thermal polymerization effect can obtain promoting. Therefore, the manufactured capacitor has better effect and longer service life, and the capacitor has the effects of being more silent when in use and the like, thereby meeting the market demand.
In conclusion, the beneficial technical effects of the invention are as follows:
1. because the double-sided aluminum metalized polypropylene film adopts the polypropylene base film as a medium and is assisted by the two aluminum metalized layers for conducting and storing charges, and the design of reserving edges in the double sides is adopted, the manufactured capacitor is equivalent to two capacitors which are connected in series, and the voltage resistance of the capacitor is favorably improved;
2. the method adopts the plasma pretreatment and corona treatment modes to treat the non-corona surface of the polypropylene film, and carries out vacuum evaporation on the aluminum metallization layer in a high-vacuum metal deposition mode, thereby solving the problem that a layer of aluminum metal layer is condensed on both the front surface and the back surface of the polypropylene film by evaporation and having the advantage of uniformly evaporating the aluminum metallization layer;
3. according to the capacitor core, each layer is made of the polypropylene film, the thermal shrinkage ratio of each layer is approximate, and the capacitor core has the advantage of improving the thermal polymerization effect.
Drawings
Fig. 1 is a schematic structural view of a double-sided aluminum metallized polypropylene film according to example 1 of the present invention.
Fig. 2 is a flowchart of a method provided in embodiment 2 of the present invention.
Fig. 3 is a schematic structural view of a capacitor core according to embodiment 3 of the present invention.
In the figure, 1, polypropylene base film; 2. an aluminum metallization layer; 3. reserving an edge in the middle; 4. single-sided metallized polypropylene film; 5. a polypropylene light film; 6. double-sided aluminum metallized polypropylene film.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples.
Example 1: referring to fig. 1, the double-sided aluminum metalized polypropylene film disclosed by the present invention comprises a polypropylene base film 1 and two pairs of aluminum metalized layers 2 respectively attached to the surface of the polypropylene base film 1, wherein one pair of aluminum metalized layers 2, the polypropylene base film 1 and the other pair of aluminum metalized layers 2 are sequentially and closely attached side by side. In addition, the outer side edges of the aluminum metalized layers 2 are flush with the side edges of the polypropylene base film 1, and the middle remaining edges 3 are formed at the strip-shaped intervals among the aluminum metalized layers 2 on the same surface of the polypropylene base film 1.
The total thickness of the double-sided aluminum metalized polypropylene film 6 is 4.6-5.0 μm, and the total width is 21.8-22.2 mm. The width of the middle margin 3 is 2.8mm-3.2 mm. The width of the aluminum metallization layer 2 is 9.3mm-9.7mm, and the sheet resistance is 1.0 omega/□ -2.0 omega/□.
Example 2: referring to fig. 2, a method for preparing a double-sided aluminum metalized polypropylene film disclosed by the invention is used for preparing the double-sided aluminum metalized polypropylene film 6 of the embodiment 1, and comprises the following steps: the method comprises the following steps of primary pre-installation, primary vacuum evaporation, secondary pre-installation, corona surface corona prevention, secondary vacuum evaporation, semi-finished product detection, aging and slitting, and post-treatment.
(1) First preinstallation
The polypropylene base film 1 is sent into a vacuum winding chamber through a crane and is arranged on a unwinding roller of a machine table, so that a first corona surface of the polypropylene base film 1 is exposed. Then the compression rollers compress the four edges of the polypropylene base film 1 and close the vacuum winding chamber. And finally, operating a vacuum pump and vacuumizing the interior of the vacuum winding chamber, wherein the vacuum degree of the interior of the vacuum winding chamber reaches 4mbar-10 mbar.
(2) First vacuum evaporation
And heating the oil pot and the oil baffle plate filled with the shielding oil while vacuumizing the vacuum winding chamber to ensure that the temperature of the oil pot reaches 170 ℃ and the temperature of the oil baffle plate reaches 175 ℃. Meanwhile, the refrigerating device is turned on, so that the temperature of the refrigerating main roller reaches-15 ℃ to 10 ℃. Then, in a vacuum state, the polypropylene base film 1 is continuously unreeled and reeled through the unreeling roller of the machine table, and meanwhile, the polyethylene base film is tightly attached to the refrigeration main roller through the electronic gun. Therefore, the scald of the evaporated aluminum to the polypropylene film in the evaporation process can be reduced, and the heat shrinkage of the polypropylene film can be well controlled. Running for 1-2min under the state, then operating an oil pot, and spraying shielding oil in the oil pot on the surface of the first corona surface of the polypropylene base film 1 at intervals through an oil baffle. Wherein, the width of the shielding oil is 3 mm.
And then heating the evaporation boat, adjusting the power of the evaporation boat to be 10kW, and adjusting the wire feeding speed to be 1m/min, wherein the aluminum wires in the evaporation boat are evaporated and attached to the first corona surface of the polypropylene film. The aluminum is attached to the area of the first corona surface which is not sprayed with the shielding oil and is uniformly deposited in a high vacuum environment, so that a uniform aluminum metallization layer 2 is formed, and strip-shaped intervals sprayed with the shielding oil form middle margins 3. And because the aluminium metallization layer 2 of coating by vaporization is thinner, can keep the planarization of polypropylene base film 1 in the coating by vaporization in-process, and then solve the technical problem that is difficult to control the thermal deformation among the prior art.
And after the evaporation is finished, closing the vacuum pump, and relieving the vacuum to ensure that the pressure of the vacuum winding chamber is equal to the atmospheric pressure, thereby obtaining the single-side aluminum metallized polypropylene film.
(3) Second preinstallation
And after the first corona surface of the polypropylene base film 1 is evaporated, obtaining the single-side aluminum metalized polypropylene film. Utilize the board to unreel the roller and overturn polypropylene base film 1 for the corona surface of polypropylene base film 1 exposes, then the pinch roller compresses tightly four borders of polypropylene base film 1. And finally, operating a vacuum pump and vacuumizing the interior of the vacuum winding chamber, wherein the vacuum degree of the interior of the vacuum winding chamber reaches 4mbar-10 mbar.
(4) Corona of corona-free surface
In order to ensure that the aluminum metalized layer 2 can be smoothly and firmly attached to the corona-free surface of the polypropylene film, the corona-free surface of the polypropylene film is subjected to plasma pretreatment before vapor deposition. Namely, a plasma generator is adopted to generate plasma jet, the plasma generator is a cold arc plasma generator, when compressed air with certain flow rate flows through the plasma generator, air plasma jet can be generated, and the outlet temperature of a nozzle is 250-350 ℃. Finally, the air plasma jet can be sprayed on the surface of the corona-free surface of the polypropylene film, and various pollutants such as dust, oil stains and the like are removed from the surface of the aluminum foil.
And then inputting inert gas and oxygen on the polar plates of the vacuum winding chamber, allowing the single-surface aluminum metalized polypropylene film to pass between the polar plates with high voltage, bombarding the non-corona surface of the polypropylene base film 1 by high voltage, and electronically activating and rearranging the surface of the non-corona surface, so that the non-corona surface of the polypropylene base film 1 is processed into the polypropylene base film 1 with corona characteristics. Wherein the bombardment strength of the polar plates is 9.8 W.min/m-10.2 W.min/m, the high voltage of the band between the two polar plates is 10kV, and the wetting tension of the polypropylene basal membrane 1 is 40 m.N/m-41 m.N/m. After the treatment is completed, the gaseous aluminum can be smoothly attached to the corona-free surface of the polypropylene film.
(5) Second vacuum evaporation
And continuously heating the oil pot filled with the shielding oil and the oil baffle plate to ensure that the temperature of the oil pot reaches 170 ℃ and the temperature of the oil baffle plate reaches 175 ℃. Meanwhile, the refrigerating device is turned on, so that the temperature of the refrigerating main roller reaches-15 ℃ to 10 ℃. Then, in a vacuum state, the polypropylene base film 1 is continuously unreeled and reeled through the unreeling roller of the machine table, and meanwhile, the polyethylene base film is tightly attached to the refrigeration main roller through the electronic gun. Therefore, the scald of the evaporated aluminum to the polypropylene film in the evaporation process can be reduced, and the heat shrinkage of the polypropylene film can be well controlled. Running for 1-2min under the state, then operating an oil pot, and spraying shielding oil in the oil pot on the surface of the second corona surface of the polypropylene base film 1 at intervals through an oil baffle.
And then heating the evaporation boat, adjusting the power of the evaporation boat to be 10kW, and adjusting the wire feeding speed to be 1m/min, wherein the aluminum wires in the evaporation boat are evaporated and attached to the second corona surface of the polypropylene film. The aluminum is attached to the area of the second corona surface which is not sprayed with the shielding oil and is uniformly deposited in a high vacuum environment, so that a uniform aluminum metallization layer 2 is formed, and strip-shaped intervals sprayed with the shielding oil form middle margins 3. And because the aluminium metallization layer 2 of coating by vaporization is thinner, can keep the planarization of polypropylene base film 1 in the coating by vaporization in-process, and then solve the technical problem that is difficult to control the thermal deformation among the prior art.
And after the evaporation is finished, closing the vacuum pump, and relieving the vacuum to ensure that the pressure of the vacuum winding chamber is equal to the atmospheric pressure, thereby obtaining the semi-finished product of the double-sided aluminum metallized polypropylene film 6.
(6) Semi-finished product detection
Detecting the specification of the semi-finished product, wherein the specification of the semi-finished product is required to be 22mm of the total width of the finished product; the width of the middle reserved edge 3 is 3 mm; the width of the aluminum metallization layer 2 is 9.5mm, and the sheet resistance is 1-2 omega/□. Wherein the thickness error is required to be less than +/-5 percent, and the width error is required to be less than +/-0.2 mm.
(7) Aging and slitting
And carrying out first aging treatment on the coiled semi-finished product of the double-sided aluminum metallized polypropylene film 6 in an environment with the dust-free grade of 1 ten thousand or below, the temperature of 32-38 ℃ and the humidity of 30-50% for 72 hours. The first aged film was then cut into films as described in example 1. And (3) carrying out secondary aging treatment on the cut film in an environment with the dust-free grade of 1 ten thousand or below, the temperature of 30-40 ℃ and the humidity of 50-60% for 24h to obtain a finished product of the double-sided aluminum metallized polypropylene film 6.
(8) Post-treatment
Detecting the specification of the finished product of the double-sided aluminum metallized polypropylene film 6, wherein the specification of the finished product is required to be that the total thickness of the finished product is 4.8 mu m and the total width is 22 mm; the width of the middle reserved edge 3 is 3 mm; the width of the aluminum metallization layer 2 is 9.5mm, and the sheet resistance is 1-2 omega/□. Wherein the thickness error is required to be less than +/-5 percent, and the width error is required to be less than +/-0.2 mm. And (5) after the finished product is detected to be qualified, carrying out vacuum packaging.
(9) Performance test
Samples were selected from different batches of product and the total thickness and width of the samples, the width of the intermediate margin 3, the width of the aluminium metallisation layer 2 and the sheet resistance were measured. Wherein 10 samples were taken from each batch and used as one set. Each sample was measured 3 times and the average was taken; the three measurement points of the sheet resistance of the aluminum metallization layer 2 are the middle area and the peripheral area of the aluminum metallization layer 2 respectively. The results of the measurements of the respective samples are shown in Table 1.
TABLE 1
As can be seen from table 1, the total thickness and total width of the sample, the width of the middle margin 3, the width of the aluminum metallization layer 2, and other data of the sample were measured to have a total average value and sheet resistance consistent with the specifications required in the post-processing step. In addition, the average values for each sample and each group also meet the specification error required in the post-processing step. Thus, using the above method, a double-sided aluminum metallized polypropylene film 6 meeting production requirements and as described in example 1 can be prepared.
Example 3: referring to fig. 3, the capacitor core disclosed by the invention comprises a pair of single-sided metallized polypropylene films 4 arranged side by side, a polypropylene optical film 5 arranged between the single-sided metallized polypropylene films 4 and a double-sided aluminum metallized polypropylene film 6. The single-sided metallized polypropylene film 4, the polypropylene optical film 5, the double-sided aluminum metallized polypropylene film 6 and the single-sided metallized polypropylene film 4 are sequentially arranged side by side. The single-sided metallized polypropylene film 4 is the single-sided metallized polypropylene film 4 with the middle margin 3, and the double-sided aluminum metallized polypropylene film 6 is the double-sided aluminum metallized polypropylene film 6 with the middle margin 3 described in example 1.
The width of the double-sided aluminum metallized polypropylene film 6 is larger than that of the polypropylene optical film 5, the side edges of the two are equally spaced, and the spacing d1 is 1.5mm-2.0 mm. The width of the double-sided aluminum metalized polypropylene film 6 is smaller than that of the single-sided metalized polypropylene film 4, the side edges of the double-sided aluminum metalized polypropylene film and the single-sided metalized polypropylene film are equal, and the distance d2 is 2.0mm-2.5 mm.
Adopt two-sided aluminium metallized polypropylene film 6 and single face metallized polypropylene film 4 and the cooperation of polypropylene membrane 5 to wind when the capacitor core is convoluteed, then three kinds of films all are the polypropylene film material, and the thermal contraction ratio is close, and when capacitor core hot pressing, the thermal polymerization effect can obtain promoting. Therefore, the manufactured capacitor has better effect and longer service life, and the capacitor has the effects of being more silent when in use and the like, thereby meeting the market demand.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A two-sided aluminium metallized polypropylene film is characterized in that: the method is characterized in that: including the polypropylene base film, two surfaces of polypropylene base film all closely paste and are equipped with two aluminium metallization layers that set up side by side, same surface leave the limit in the middle of the strip interval formation between the aluminium metallization layer.
2. The double-sided aluminum metallized polypropylene film of claim 1, wherein: the total thickness of the double-sided aluminum metallized polypropylene film is 4.6-5.0 μm; wherein the sheet resistance of the aluminum metallization layer is 1.0 omega/□ -2.0 omega/□.
3. The double-sided aluminum metallized polypropylene film of claim 1, wherein: the width of the middle margin is 2.8mm-3.2 mm.
4. The method for preparing a double-sided aluminum metallized polypropylene film according to any one of claims 1 to 3, wherein: comprises the following steps of (a) carrying out,
s1 first vacuum evaporation: carrying out vacuum evaporation treatment on the corona surface on one side of the polypropylene base film, and evaporating an aluminum metalized layer on the corona surface on one side of the polypropylene base film to obtain a single-side aluminum metalized polypropylene film;
s2 corona of non-corona surface: taking a single-side aluminum metallized polypropylene film, firstly carrying out plasma pretreatment on the non-corona surface of the polypropylene base film, then carrying out corona treatment on the non-corona surface on the other side, and processing the non-corona surface into a corona surface to obtain a semi-finished film;
s3 second vacuum evaporation: taking a semi-finished product film, carrying out vacuum evaporation treatment on the corona surface on the other side of the polypropylene base film, and evaporating an aluminum metalized layer on the corona surface on the other side of the polypropylene base film to obtain a double-sided aluminum metalized polypropylene film semi-finished product;
and S4 post-processing: and carrying out aging and slitting treatment on the semi-finished product of the double-sided aluminum metallized polypropylene film to obtain the double-sided aluminum metallized polypropylene film.
5. The method for preparing a double-sided aluminum metallized polypropylene film according to claim 4, wherein the method comprises the following steps: in first vacuum evaporation plating and corona surface corona, all carry out following processing to the polypropylene base film in advance, install the polypropylene base film in vacuum environment, and vacuum is 4mbar-10 mbar.
6. The method for preparing a double-sided aluminum metallized polypropylene film according to claim 5, wherein the method comprises the following steps: the vacuum evaporation treatment comprises the following steps of,
s1 oil spray screen: heating an oil pot and an oil baffle plate, wherein shielding oil is sprayed to the corona surface of the polypropylene base film at intervals by the oil pot, the shielding oil is attached to the corona surface of the polypropylene base film through the oil baffle plate, and the spraying width of the shielding oil is 2.8mm-3.2 mm;
s2 main roll cooling: opening a refrigerating device, controlling the temperature of a refrigerating main roller to be-15-10 ℃, and cooling the polypropylene base film through the refrigerating main roller;
s3 vacuum evaporation: heating the evaporation boat, wherein the aluminum wire evaporated on the evaporation boat is attached to the corona surface of the polypropylene base film, and an aluminum metallization layer is formed;
s4 releasing the vacuum: and closing the vacuum pump, and releasing the vacuum to ensure that the pressure of the vacuum winding chamber is equal to the atmospheric pressure.
7. The method for preparing a double-sided aluminum metallized polypropylene film according to claim 6, wherein the method comprises the following steps: in the oil spraying screen belt step, the temperature of an oil can is 170 ℃, and the temperature of an oil baffle plate is 175 ℃.
8. The method for preparing a double-sided aluminum metallized polypropylene film according to claim 4, wherein the method comprises the following steps: in the step of plasma pretreatment, a plasma generator is adopted to spray plasma jet to the corona-free surface of the polypropylene basal membrane, and the outlet temperature of a nozzle of the plasma generator is 250-350 ℃.
9. The method for preparing a double-sided aluminum metallized polypropylene film according to claim 4, wherein the method comprises the following steps: the corona treatment step is specifically realized in a way that a mono-surface aluminum metallized polypropylene film passes through a space between polar plates with high voltage, and bombards the non-corona surface of a polypropylene base film by high voltage; wherein the bombardment intensity of the polar plate is 9.8 W.min/m-10.2 W.min/m.
10. A capacitor core, comprising: comprising a pair of single-sided metallized polypropylene films disposed side-by-side, a polypropylene optical film disposed between the single-sided metallized polypropylene films, and a double-sided aluminum metallized polypropylene film according to any one of claims 1 to 3.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088886A (en) * | 2021-03-03 | 2021-07-09 | 淮安实全科技有限公司 | Vapor deposition process of metallized polypropylene film dielectric capacitor |
| CN115725951A (en) * | 2022-12-16 | 2023-03-03 | 江门市兆业科技有限公司 | Preparation method of metallized film with two-sided continuous deposition coating |
| CN116397198A (en) * | 2023-04-06 | 2023-07-07 | 安徽赛福电子有限公司 | THB (THB) antioxidation metallized film and manufacturing method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002101770A1 (en) * | 2001-06-08 | 2002-12-19 | Matsushita Electric Industrial Co., Ltd. | Metallized film capacitor |
| CN103839675A (en) * | 2014-03-12 | 2014-06-04 | 浙江七星电容器有限公司 | Metallic film capacitor |
| CN203706876U (en) * | 2013-12-24 | 2014-07-09 | 安徽赛福电子有限公司 | High-frequency absorption film of capacitor |
| CN108155010A (en) * | 2017-12-13 | 2018-06-12 | 河南华佳新材料技术有限公司 | A kind of two-sided metallization polypropylene film and preparation method thereof |
| CN109003816A (en) * | 2018-06-11 | 2018-12-14 | 铜陵市胜美达电子制造有限公司 | A kind of power electronic capacitor |
| CN208873614U (en) * | 2018-08-27 | 2019-05-17 | 浙江七星电子股份有限公司 | The ultra-thin capacitor of MPBH high-frequency emission |
| KR102014402B1 (en) * | 2017-12-15 | 2019-08-26 | 성문전자주식회사 | A deposition apparatus for a film capacitor having two masks |
-
2019
- 2019-09-29 CN CN201910930397.7A patent/CN110684944A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002101770A1 (en) * | 2001-06-08 | 2002-12-19 | Matsushita Electric Industrial Co., Ltd. | Metallized film capacitor |
| CN203706876U (en) * | 2013-12-24 | 2014-07-09 | 安徽赛福电子有限公司 | High-frequency absorption film of capacitor |
| CN103839675A (en) * | 2014-03-12 | 2014-06-04 | 浙江七星电容器有限公司 | Metallic film capacitor |
| CN108155010A (en) * | 2017-12-13 | 2018-06-12 | 河南华佳新材料技术有限公司 | A kind of two-sided metallization polypropylene film and preparation method thereof |
| KR102014402B1 (en) * | 2017-12-15 | 2019-08-26 | 성문전자주식회사 | A deposition apparatus for a film capacitor having two masks |
| CN109003816A (en) * | 2018-06-11 | 2018-12-14 | 铜陵市胜美达电子制造有限公司 | A kind of power electronic capacitor |
| CN208873614U (en) * | 2018-08-27 | 2019-05-17 | 浙江七星电子股份有限公司 | The ultra-thin capacitor of MPBH high-frequency emission |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113088886A (en) * | 2021-03-03 | 2021-07-09 | 淮安实全科技有限公司 | Vapor deposition process of metallized polypropylene film dielectric capacitor |
| CN115725951A (en) * | 2022-12-16 | 2023-03-03 | 江门市兆业科技有限公司 | Preparation method of metallized film with two-sided continuous deposition coating |
| CN116397198A (en) * | 2023-04-06 | 2023-07-07 | 安徽赛福电子有限公司 | THB (THB) antioxidation metallized film and manufacturing method thereof |
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