CN115458342A - BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof - Google Patents
BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof Download PDFInfo
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- CN115458342A CN115458342A CN202211215549.3A CN202211215549A CN115458342A CN 115458342 A CN115458342 A CN 115458342A CN 202211215549 A CN202211215549 A CN 202211215549A CN 115458342 A CN115458342 A CN 115458342A
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- Prior art keywords
- polypropylene
- polyethylene
- stretched
- parts
- capacitor film
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G13/00—Apparatus specially adapted for manufacturing capacitors; Processes specially adapted for manufacturing capacitors not provided for in groups H01G4/00 - H01G11/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Abstract
The invention provides a BOPP (biaxially-oriented polypropylene) capacitor film and a preparation process thereof, relating to the technical field of capacitor films, and comprising the following components in parts by weight: s1: the preparation method comprises the following steps of preparing raw materials required by the capacitor film, wherein the polyethylene is in two parts, and the polypropylene is in four parts. According to the invention, the anti-oxidation coating is coated on the outer surface of the polypropylene, the anti-oxidation coating is coated on the outer surface of one side of the polypropylene after the polypropylene is stretched, firstly, the specific material of the anti-oxidation coating is high-purity silicate solution, the silicate solution is coated on the outer surface of the polypropylene, so that the overall high-temperature resistance of the polypropylene is improved, then, the polypropylene is stretched by a stretching machine, firstly, the polypropylene needs to be processed in the thickness required by a capacitance film in the processing process, then, the polypropylene is stretched by the stretching machine in the processing process until the thickness is stretched to be qualified, and the high-temperature resistance of the material is better by the method, and the material cannot be easily damaged in an environment with relatively high temperature.
Description
Technical Field
The invention relates to the technical field of capacitor films, in particular to a BOPP (biaxially-oriented polypropylene) capacitor film and a preparation process thereof.
Background
Capacitance is also referred to as "capacitance" and refers to the storage of free charge at a given potential difference, denoted C, and international units are farad (F), generally speaking, charge is forced to move in an electric field, when a medium is present between conductors, the movement of charge is hindered, and charge is accumulated on the conductors, resulting in the accumulated storage of charge, the amount of stored charge is referred to as capacitance, capacitance refers to the ability to hold charge, any electrostatic field is composed of a plurality of capacitances, there is an electrostatic field with a capacitance, and capacitance is described by an electrostatic field, and it is generally considered that: the isolated conductor and infinity form a capacitor, the conductor is grounded equivalently to be connected to infinity, and the conductor is integrally connected with the ground, and the capacitor is a physical quantity representing the charge capacity of the capacitor. The capacitor is a static charge storage medium physically, and the possibility of permanent existence of charge is a characteristic of the capacitor, so that the capacitor has wide application and is an indispensable electronic element in the electronic and electric fields. The circuit is mainly used for circuits of power supply filtering, signal coupling, resonance, filtering, compensation, charging and discharging, energy storage, direct current isolation and the like.
However, in the prior art, the capacitor needs to use the polypropylene as a main carrier of the capacitor in the production process, and the main function of the capacitor is that overload occurs in the use process of some electronic components, which causes the PCB to be broken down or damaged, so the capacitor protects the PCB in such an environment, and also needs to bear a certain high temperature, and the capacitor can bear in such an environment, but if the external high temperature and the self temperature are too high, the temperature which can be borne by the polypropylene is easily exceeded by the addition of the external high temperature and the self temperature, and if the capacitor is in such a condition for a long time, the capacitor is easily damaged.
Disclosure of Invention
The invention aims to solve the defects in the prior art that a capacitor needs to bear certain high temperature, the capacitor can bear the high temperature in the environment, if the external high temperature and the self temperature are too high, the sum of the external high temperature and the self temperature is easily over the temperature which can be borne by the polypropylene, and if the capacitor is in the condition for a long time, the capacitor is easily damaged.
In order to achieve the purpose, the invention adopts the following technical scheme: the preparation process of the BOPP biaxially-oriented capacitor film comprises the following steps of:
s1: preparing raw materials required by a capacitor film, wherein the polyethylene is in two parts, and the polypropylene is in four parts;
s2: processing polyethylene and polypropylene: heating two parts of polyethylene and four parts of polypropylene at high temperature, and adding a cosolvent in the heating process to melt the two parts of polyethylene and the four parts of polypropylene to form polypropylene;
s3: and (3) polypropylene ethylene treatment: placing the polypropylene on a platform, then rolling by using a roller, forming the polypropylene in the rolling process, and waiting for 3min after forming to completely form the polypropylene;
s4: stretching the raw materials: respectively placing the two sides of the molded polypropylene on the two sides of a stretcher, and then opening a power switch of the stretcher to stretch the polypropylene to the corresponding required thickness;
s5: strength of reinforced polystyrene: spreading the stretched polypropylene on a platform, and then coating an antioxidant coating on the outer surface of the polypropylene;
s6: cutting the polypropylene: and after the polypropylene is processed through the steps S1-S5, the polypropylene is cut to an appropriate size, so that the polypropylene can be conveniently rolled at a later period.
As a preferred embodiment, the specific material of the first co-solvent is propylene glycol methyl ether acetate, and the ratio of the added solvent is 5.
As a preferable embodiment, if the polyethylene and the polypropylene are fused and then become the polyethylene in step S2, the polyethylene becomes the polyethylene and then needs to be pressed into a flat shape, because the thickness of the capacitor film needs to be processed according to the product requirement, during the processing, if the thickness of the polyethylene is too large, or the overall shape is irregular, it is inconvenient to process the capacitor film subsequently, and relatively speaking, it is convenient to process the capacitor film by adding the polyethylene into a flat shape.
As a preferred embodiment, in step S4, the polypropylene needs to be stretched by a stretching machine, and first the polypropylene needs to be processed to the thickness required by the capacitor film during the processing, then the polypropylene is stretched by the stretching machine until the thickness is stretched to be qualified during the processing, and then the process is stopped.
As a preferred embodiment, after the polypropylene is stretched, an anti-oxidation coating needs to be coated on one side of the outer surface of the polypropylene, and firstly, the specific material of the anti-oxidation coating is a high-purity silicate solution, and the silicate solution is coated on the outer surface of the polypropylene, so that the high-temperature resistance of the whole polypropylene is improved, and the stability of the capacitor in the using process is higher.
The BOPP biaxially oriented capacitor film comprises a capacitor according to the preparation process of the BOPP biaxially oriented capacitor film.
Compared with the prior art, the invention has the advantages and positive effects that,
1. in the invention, polypropylene and polyethylene are heated according to a certain proportion, the polypropylene and the polyethylene are gradually melted in the heating process, a cosolvent is required to be added in the melting process, wherein the concrete material of the cosolvent is propylene glycol monomethyl ether acetate, the adding proportion is 5: stretching the polypropylene film to a corresponding required thickness, flatly laying the stretched polypropylene film on a platform, then coating an antioxidant coating on the outer surface of the polypropylene film, coating the antioxidant coating on the outer surface of one side of the polypropylene film after the stretching of the polypropylene film, wherein the specific material of the antioxidant coating is high-purity silicate solution, coating the silicate solution on the outer surface of the polypropylene film, so that the overall high-temperature resistance of the polypropylene film is improved, then stretching the polypropylene film by a stretcher, processing the polypropylene film by the thickness required by the capacitance film during the processing process, stretching the polypropylene film by the stretcher during the processing process until the thickness is stretched to be qualified, and stopping the processing, so that the high-temperature resistance of the material is better, will not easily break down when subjected to relatively high temperature environments.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Example 1
The invention provides a technical scheme that: the BOPP biaxial tension capacitor film comprises polyethylene and polypropylene:
s1: preparing raw materials required by a capacitor film, wherein the polyethylene is in two parts, and the polypropylene is in four parts;
s2: processing polyethylene and polypropylene: processing polyethylene and polypropylene: heating two parts of polyethylene and four parts of polypropylene at high temperature, and adding a cosolvent in the heating process to melt the two parts of polyethylene and the four parts of polypropylene to form polypropylene;
s3: and (3) polypropylene ethylene treatment: placing the polypropylene on a platform, then rolling by using a roller, forming the polypropylene in the rolling process, and waiting for 3min after forming to completely form the polypropylene;
s4: stretching the raw materials: respectively placing the two sides of the molded polypropylene on the two sides of a stretcher, and then opening a power switch of the stretcher to stretch the polypropylene to the corresponding required thickness;
s5: strength of reinforced polystyrene: spreading the stretched polystyrene on a platform, and then coating an antioxidant coating on the outer surface of the polystyrene;
s6: cutting the polypropylene: and after the polypropylene is processed through the steps S1-S5, the polypropylene is cut to an appropriate size, so that the polypropylene can be conveniently rolled at a later period.
Firstly, the concrete material of the cosolvent is propylene glycol methyl ether acetate, the adding proportion is 5.
The working principle of the embodiment is as follows:
firstly, heating polypropylene and polyethylene according to a certain proportion, wherein the polypropylene and the polyethylene are gradually melted in the heating process, a cosolvent is required to be added in the melting process, the concrete material of the cosolvent is propylene glycol methyl ether acetate, the adding proportion is 5.
The BOPP biaxially oriented capacitor film comprises a capacitor according to the preparation process of the BOPP biaxially oriented capacitor film.
Comparative example 1
This example is substantially the same as the method of example 1 provided, with the main differences being: no cosolvent is added;
comparative example 2
This example is substantially the same as the method of example 1 provided, with the main differences being: propylene glycol methyl ether acetate was not added when the polypropylene ethylene melted.
Comparative example 3
This example is substantially the same as the method of example 1 provided, with the main differences being: roller compaction was not used.
Performance test
Passes the GB/T3512-2014 standard
The oxidation resistance, temperature resistance, high temperature resistance and solubility results of the BOPP biaxially-oriented capacitor film provided by the example 1 and the comparative examples 1-3 are respectively taken in equal amounts:
| oxidation resistance | High temperature resistance | Solubility in water | |
| Example 1 | 99.9％ | 99.9％ | 99.9％ |
| Comparative example 1 | 80％ | 99.9％ | 85％ |
| Comparative example 2 | 93％ | 50％ | 72％ |
| Comparative example 3 | 99.9％ | 99.9％ | 80％ |
As can be seen from the analysis of the relevant data in the above tables, by the present invention,
s1: preparing raw materials required by a capacitor film, wherein the polyethylene is in two parts, and the polypropylene is in four parts;
s2: processing polyethylene and polypropylene: processing polyethylene and polypropylene: heating two parts of polyethylene and four parts of polypropylene at high temperature, and adding a cosolvent in the heating process to melt the two parts of polyethylene and the four parts of polypropylene to form polypropylene;
s3: and (3) polypropylene ethylene treatment: placing the polypropylene on a platform, then rolling by using a roller, forming the polypropylene in the rolling process, and waiting for 3min after forming to completely form the polypropylene;
s4: stretching the raw materials: respectively placing two sides of the molded polypropylene on two sides of a stretcher, and then opening a power switch of the stretcher to stretch the polypropylene to a corresponding required thickness;
s5: strength of reinforced polystyrene: spreading the stretched polystyrene on a platform, and then coating an antioxidant coating on the outer surface of the polystyrene;
s6: cutting the polypropylene: and cutting the polypropylene after the processing of the steps S1-S5 to a proper size so as to facilitate rolling at a later stage.
Firstly, the concrete material of the cosolvent is propylene glycol methyl ether acetate, the adding proportion is 5, the total proportion of polyethylene and polypropylene is 5, the proportion of propylene glycol methyl ether acetate is 1, then the propylene glycol methyl ether acetate is added in the process of fusing polyethylene and polypropylene, the fusing time of polyethylene and polypropylene is reduced for a certain time, the convenience and the rapidness are realized, step S2 refers to that polyethylene and polypropylene become polypropylene after being fused, then the polypropylene becomes flat, because the thickness of the capacitor film needs to be processed according to the product requirements, in the processing process, if the thickness of the polypropylene is too large or the overall shape is irregular and inconvenient to be processed subsequently, relatively, the polypropylene is added flat to facilitate the processing of the polypropylene, in the step S4, the polypropylene needs to be stretched by a stretcher, firstly, the polypropylene needs to be processed by the thickness required by the capacitor film in the processing process, the polypropylene is stretched by a stretching silicate machine until the thickness is stretched, then the polypropylene needs to be stretched in the stretching machine, the polypropylene solution is coated on the outer surface of the high-temperature-resistant silicate, and the high-temperature-resistant silicate solution is coated on the outer surface of the polypropylene film, so as to improve the oxidation-resistant silicate solution.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (6)
- A preparation process of a BOPP biaxially-oriented capacitor film is characterized by comprising the following steps: including polyethylene, polypropylene:s1: preparing raw materials required by a capacitor film, wherein the polyethylene is in two parts, and the polypropylene is in four parts;s2: processing polyethylene and polypropylene: heating two parts of polyethylene and four parts of polypropylene at high temperature, and adding a cosolvent in the heating process to melt the two parts of polyethylene and the four parts of polypropylene to form polypropylene;s3: and (3) polypropylene ethylene treatment: placing the polypropylene on a platform, then rolling by using a roller, forming the polypropylene in the rolling process, and waiting for 3min after forming to completely form the polypropylene;s4: stretching the raw materials: respectively placing two sides of the molded polypropylene on two sides of a stretcher, and then opening a power switch of the stretcher to stretch the polypropylene to a corresponding required thickness;s5: strength of reinforced polystyrene: spreading the stretched polystyrene on a platform, and then coating an antioxidant coating on the outer surface of the polystyrene;s6: cutting the polypropylene: and cutting the polypropylene after the processing of the steps S1-S5 to a proper size so as to facilitate rolling at a later stage.
- 2. The preparation process of the BOPP biaxially-oriented capacitor film according to claim 1, wherein the preparation process comprises the following steps: according to step S2: firstly, the concrete material of the cosolvent is propylene glycol methyl ether acetate, the adding proportion is 5, wherein the total proportion of polyethylene and polypropylene is 5, and the proportion of propylene glycol methyl ether acetate is 1, then the propylene glycol methyl ether acetate is added in the fusion process of polyethylene and polypropylene, so that the fusion time of polyethylene and polypropylene is reduced to a certain extent.
- 3. The preparation process of the BOPP biaxial stretching capacitor film as claimed in claim 1, characterized in that: according to the step S3, if the polyethylene and the polypropylene are fused and then become the polystyrene in the step S2, the polyethylene and the polypropylene need to be pressed into a flat shape after becoming the polystyrene, and because the thickness of the capacitor film needs to be processed according to the product needs, in the processing process, if the thickness of the polystyrene is too large or the overall shape is irregular, the subsequent processing is inconvenient, and relatively speaking, the polypropylene and the polypropylene are added into a flat shape, so that the processing is convenient.
- 4. The preparation process of the BOPP biaxially-oriented capacitor film according to claim 1, wherein the preparation process comprises the following steps: according to step S4: in step S4, the polypropylene needs to be stretched by a stretcher, and first, the polypropylene needs to be processed by the thickness required by the capacitor film in the processing process, and then, the polypropylene is stretched by the stretcher in the processing process until the thickness is stretched to be qualified, and then the process is stopped.
- 5. The preparation process of the BOPP biaxial stretching capacitor film as claimed in claim 1, characterized in that: according to step S5: after the polypropylene is stretched, an anti-oxidation coating needs to be coated on the outer surface of one side of the polypropylene, and firstly, the specific material of the anti-oxidation coating is high-purity silicate solution, and the silicate solution is coated on the outer surface of the polypropylene.
- A BOPP biaxially oriented capacitive film, the process for preparing a BOPP biaxially oriented capacitive film according to any one of claims 1 to 5, characterized in that: including a capacitive film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211215549.3A CN115458342A (en) | 2022-09-30 | 2022-09-30 | BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211215549.3A CN115458342A (en) | 2022-09-30 | 2022-09-30 | BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof |
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| CN115458342A true CN115458342A (en) | 2022-12-09 |
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| CN202211215549.3A Pending CN115458342A (en) | 2022-09-30 | 2022-09-30 | BOPP (biaxially-oriented Polypropylene) capacitor film and preparation process thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1440041A (en) * | 2002-08-08 | 2003-09-03 | 江苏南天集团股份有限公司 | High temperature resistant polypropylene capactive film and production thereof |
| CN101448883A (en) * | 2006-05-15 | 2009-06-03 | 东燃化学株式会社 | Microporous polyolefin membrane, its production method, battery separator and battery |
| CN202888297U (en) * | 2012-09-24 | 2013-04-17 | 深圳市冠力新材料有限公司 | Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries |
| CN103937104A (en) * | 2014-04-12 | 2014-07-23 | 安徽江威精密制造有限公司 | Metallized film for flame-retardant anti-breakdown isotatic polypropylene capacitor and preparation method of metallized film |
| US20180043656A1 (en) * | 2017-09-18 | 2018-02-15 | LiSo Plastics, L.L.C. | Oriented Multilayer Porous Film |
| CN111138741A (en) * | 2019-12-23 | 2020-05-12 | 重庆云天化纽米科技股份有限公司 | High-performance polyolefin diaphragm and preparation method thereof |
| CN112864528A (en) * | 2021-04-26 | 2021-05-28 | 江苏厚生新能源科技有限公司 | Biaxial tension coating microporous diaphragm for lithium ion battery and preparation method thereof |
-
2022
- 2022-09-30 CN CN202211215549.3A patent/CN115458342A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1440041A (en) * | 2002-08-08 | 2003-09-03 | 江苏南天集团股份有限公司 | High temperature resistant polypropylene capactive film and production thereof |
| CN101448883A (en) * | 2006-05-15 | 2009-06-03 | 东燃化学株式会社 | Microporous polyolefin membrane, its production method, battery separator and battery |
| CN202888297U (en) * | 2012-09-24 | 2013-04-17 | 深圳市冠力新材料有限公司 | Ultra-high molecular-weight polyethylene multi-layer composite diaphragm for high-temperature lithium-ion batteries |
| CN103937104A (en) * | 2014-04-12 | 2014-07-23 | 安徽江威精密制造有限公司 | Metallized film for flame-retardant anti-breakdown isotatic polypropylene capacitor and preparation method of metallized film |
| US20180043656A1 (en) * | 2017-09-18 | 2018-02-15 | LiSo Plastics, L.L.C. | Oriented Multilayer Porous Film |
| CN111138741A (en) * | 2019-12-23 | 2020-05-12 | 重庆云天化纽米科技股份有限公司 | High-performance polyolefin diaphragm and preparation method thereof |
| CN112864528A (en) * | 2021-04-26 | 2021-05-28 | 江苏厚生新能源科技有限公司 | Biaxial tension coating microporous diaphragm for lithium ion battery and preparation method thereof |
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