CN114335824A - Method for improving surface adhesion of aluminum plastic film - Google Patents
Method for improving surface adhesion of aluminum plastic film Download PDFInfo
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- CN114335824A CN114335824A CN202111608096.6A CN202111608096A CN114335824A CN 114335824 A CN114335824 A CN 114335824A CN 202111608096 A CN202111608096 A CN 202111608096A CN 114335824 A CN114335824 A CN 114335824A
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Abstract
The invention discloses a method for improving the surface adhesion of an aluminum-plastic film, which is characterized in that a nylon film and a polypropylene film are 5mm wider than a middle aluminum foil, a nylon layer and a polypropylene film layer which are wider than the aluminum foil are adsorbed together by static electricity, a closed insulating protective layer is formed on the side surface of the outer aluminum foil, a layer of slipping agent is coated after the aluminum-plastic film is cured, then plasma treatment is carried out on the aluminum-plastic film by adopting plasma treatment equipment with a special structure, and finally a finished product is obtained by rolling.
Description
The technical field is as follows:
the invention relates to the technical field of lithium battery packaging, in particular to a method for improving the surface adhesion of an aluminum-plastic film.
Background art:
in recent years, with the rapid development of new energy automobiles, particularly with high-capacity energy storage, the market demand of high-power discharge is gradually increased, and a specialized soft-package lithium battery gradually becomes one of the mainstream demands of the market due to the advantages of good safety performance, light weight, small internal resistance, flexible design, relatively low capacity attenuation speed and the like, so that the application research of various aspects of the lithium battery becomes a research hotspot. The used packaging material of soft packet of lithium cell is the plastic-aluminum membrane, mainly is applied to the encapsulation of soft packet of lithium cell electricity core extranal packing, and the plastic-aluminum membrane is the key material of soft packet of lithium cell encapsulation, and monolithic lithium cell assembles the back and seals with the plastic-aluminum membrane, forms a battery, and the plastic-aluminum membrane plays the effect of protection content.
At present, the soft packet of trade ubiquitous plastic-aluminum membrane surface adhesion of lithium cell is not enough puzzlement, and plastic-aluminum membrane surface adhesion is not enough, influences the adhesion effect that laminate polymer battery model sprayed a yard at first, after multichannel process, originally spout the spout and attach on battery surface about information such as battery model, serial number spout the yard can appear fuzzy or disappearance, this part has caused the puzzlement that many battery plants used. In addition, the surface with low adhesive force causes that batteries for portable equipment such as mobile phones and the like are not firmly fixed in the equipment, the battery fixing mode commonly adopted in the industry at present is double-sided adhesive tape bonding, but the adhesive force of the surface of the aluminum plastic film is low, so that the adhesive force of the aluminum plastic film and the double-sided adhesive tape is insufficient. The coating silicone oil method generally adopted in the market at present has multiple processing procedures and high processing cost, and the polarity difference between the silicone oil and the slipping agent can influence the surface friction of the aluminum plastic film, thereby causing the risk of shell punching and forming. Therefore, how to provide a method for improving the surface adhesion of the aluminum plastic film is provided to solve the defects of the prior art.
The invention content is as follows:
aiming at the defects of the prior art, the invention provides a method for improving the surface adhesion of an aluminum-plastic film, which comprises the following steps:
a method for improving the surface adhesion of an aluminum-plastic film is characterized by comprising the following steps:
(1) a nylon film and a polypropylene film are attached to the surface of the aluminum foil, the width of the nylon film and the width of the polypropylene film are 5mm larger than that of the middle aluminum foil, a nylon layer and a polypropylene film layer which are wider than the aluminum foil are adsorbed together through static electricity, and a closed insulating protective layer is formed on the outer layer of the side face of the aluminum foil;
(2) curing the aluminum plastic film formed by the nylon film, the aluminum foil and the polypropylene film, and then coating a slipping agent on the surface;
(3) carrying out plasma treatment on the aluminum plastic film coated with the slipping agent by adopting plasma treatment equipment with a special structure;
(4) and rolling the treated aluminum-plastic film to obtain a finished product.
Preferably, the slipping agent in the step (2) is a mixture of erucamide and behenamide, the mixing mass ratio is 5:1-3, the mixture is diluted by a mixed solvent of ethyl acetate and isopropanol after being uniformly mixed, the mixing mass ratio of the ethyl acetate to the isopropanol is 1:1, and the solid content after dilution is 0.2% -0.5%.
Preferably, the curing treatment temperature in the step (2) is 70-80 ℃, and the curing time is 50-80 hours.
Preferably, in the step (3), the plasma treatment is that the plasma equipment uses aluminum as a high-voltage discharge electrode, uses a metal roller as a conductive electrode, uses an aluminum-plastic film as an insulating layer, and further forms a high-voltage plasma beam to bombard the surface of the aluminum-plastic film.
Preferably, the plasma treatment voltage in step (3) is 3 to 5 kv.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method for improving the surface adhesion of the aluminum-plastic film is integrated on the production process, does not increase the processing procedure and the processing cost of the aluminum-plastic film, does not change the surface polarity of the aluminum-plastic film, improves the surface adhesion of the aluminum-plastic film through the physical principle, and is simple and practical.
The specific implementation mode is as follows:
the invention will be further explained and illustrated with reference to specific examples.
Examples
A method for improving the surface adhesion of an aluminum-plastic film comprises the following steps:
(1) a nylon film and a polypropylene film are attached to the surface of the aluminum foil, the width of the nylon film and the width of the polypropylene film are 5mm larger than that of the middle aluminum foil, a nylon layer and a polypropylene film layer which are wider than the aluminum foil are adsorbed together through static electricity, and a closed insulating protective layer is formed on the outer layer of the side face of the aluminum foil;
(2) curing the aluminum-plastic film formed by the nylon film, the aluminum foil and the polypropylene film at the temperature of 70-80 ℃ for 50-80 hours;
(3) preparing a slipping agent, namely mixing erucamide and behenamide according to the mass ratio of 5:1-3, uniformly mixing, and diluting by adopting a mixed solvent of ethyl acetate and isopropanol, wherein the mixing mass ratio of the ethyl acetate to the isopropanol is 1:1, and the solid content after dilution is 0.2% -0.5%;
(4) coating the slip agent on the cured aluminum-plastic film;
(5) after the slipping agent is coated, drying, then entering plasma treatment equipment with a special structure to carry out plasma treatment on the aluminum-plastic film, wherein the plasma treatment voltage is 3-5kv, the plasma equipment utilizes aluminum as a high-voltage discharge electrode, utilizes a metal roller as a conductive electrode and utilizes the aluminum-plastic film as an insulating layer, and further forms high-voltage plasma beams to bombard the surface of the aluminum-plastic film;
(6) and rolling the treated aluminum-plastic film to obtain a finished product.
Through detection, the adhesive force of the aluminum-plastic film prepared in the embodiment is 8N/cm, the adhesive force of the aluminum-plastic film prepared in the prior art is 4N/cm, the method for improving the surface adhesive force of the aluminum-plastic film provided by the invention does not increase the processing procedure and the processing cost of the aluminum-plastic film, does not change the surface polarity of the aluminum-plastic film, improves the surface adhesive force of the aluminum-plastic film through the physical principle, and is simple and practical.
Finally, the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the best embodiment, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution, and all of them shall be covered by the claims of the present invention.
Claims (5)
1. A method for improving the surface adhesion of an aluminum-plastic film is characterized by comprising the following steps:
(1) a nylon film and a polypropylene film are attached to the surface of the aluminum foil, the width of the nylon film and the width of the polypropylene film are 5mm larger than that of the middle aluminum foil, the nylon layer and the polypropylene film layer which are wider than the aluminum foil are adsorbed together through static electricity, and a closed insulating protective layer is formed on the side surface of the outer aluminum foil;
(2) curing the aluminum plastic film formed by the nylon film, the aluminum foil and the polypropylene film, and then coating a slipping agent on the surface;
(3) carrying out plasma treatment on the aluminum plastic film coated with the slipping agent by adopting plasma treatment equipment with a special structure;
(4) and rolling the treated aluminum-plastic film to obtain a finished product.
2. The method for improving the surface adhesion of the aluminum-plastic film according to claim 1, wherein the slipping agent in the step (2) is a mixture of erucamide and behenamide, the mixing mass ratio is 5:1-3, the mixture is diluted by a mixed solvent of ethyl acetate and isopropanol after being uniformly mixed, the mixing mass ratio of the ethyl acetate and the isopropanol is 1:1, and the solid content after dilution is 0.2% -0.5%.
3. The method for improving the surface adhesion of the aluminum-plastic film according to claim 1, wherein the curing treatment temperature in the step (2) is 70-80 ℃ and the curing time is 50-80 hours.
4. The method for improving the adhesion of the surface of the aluminum-plastic film as claimed in claim 1, wherein the plasma treatment in step (3) is that the plasma equipment uses aluminum as a high-voltage discharge electrode, uses a metal roller as a conductive electrode, uses the aluminum-plastic film as an insulating layer, and further forms a high-voltage plasma beam to bombard the surface of the aluminum-plastic film.
5. The method for improving the surface adhesion of the aluminum-plastic film according to claim 1, wherein the ion treatment voltage in the step (3) is 2 to 5 kv.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608096.6A CN114335824A (en) | 2021-12-27 | 2021-12-27 | Method for improving surface adhesion of aluminum plastic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111608096.6A CN114335824A (en) | 2021-12-27 | 2021-12-27 | Method for improving surface adhesion of aluminum plastic film |
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| Publication Number | Publication Date |
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| CN114335824A true CN114335824A (en) | 2022-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111608096.6A Pending CN114335824A (en) | 2021-12-27 | 2021-12-27 | Method for improving surface adhesion of aluminum plastic film |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348786A (en) * | 2015-12-12 | 2016-02-24 | 苏州锂盾储能材料技术有限公司 | Plasma modified nylon membrane process method |
| CN109866491A (en) * | 2018-12-28 | 2019-06-11 | 新纶复合材料科技（常州）有限公司 | A kind of aluminum-plastic composite membrane with agent of low hygroscopicity nylon outer layer |
| CN209981281U (en) * | 2019-06-26 | 2020-01-21 | 恒大新能源科技集团有限公司 | Plastic-aluminum membrane processingequipment and plastic-aluminum membrane structure |
| CN211000517U (en) * | 2019-07-11 | 2020-07-14 | 多米诺标识科技有限公司 | Laminate polymer battery's online yard assembly line that spouts |
| CN111688325A (en) * | 2020-06-30 | 2020-09-22 | 常州斯威克光伏新材料有限公司 | Preparation method of aluminum-plastic composite film |
| CN112009067A (en) * | 2020-08-28 | 2020-12-01 | 广东安德力新材料有限公司 | Dry compounding process of composite aluminum plastic film for power battery |
-
2021
- 2021-12-27 CN CN202111608096.6A patent/CN114335824A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105348786A (en) * | 2015-12-12 | 2016-02-24 | 苏州锂盾储能材料技术有限公司 | Plasma modified nylon membrane process method |
| CN109866491A (en) * | 2018-12-28 | 2019-06-11 | 新纶复合材料科技（常州）有限公司 | A kind of aluminum-plastic composite membrane with agent of low hygroscopicity nylon outer layer |
| CN209981281U (en) * | 2019-06-26 | 2020-01-21 | 恒大新能源科技集团有限公司 | Plastic-aluminum membrane processingequipment and plastic-aluminum membrane structure |
| CN211000517U (en) * | 2019-07-11 | 2020-07-14 | 多米诺标识科技有限公司 | Laminate polymer battery's online yard assembly line that spouts |
| CN111688325A (en) * | 2020-06-30 | 2020-09-22 | 常州斯威克光伏新材料有限公司 | Preparation method of aluminum-plastic composite film |
| CN112009067A (en) * | 2020-08-28 | 2020-12-01 | 广东安德力新材料有限公司 | Dry compounding process of composite aluminum plastic film for power battery |
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