CN110760259B - Aluminum-plastic film smooth coating liquid and coating process thereof - Google Patents
Aluminum-plastic film smooth coating liquid and coating process thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2443/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium or a metal; Derivatives of such polymers
- C08J2443/04—Homopolymers or copolymers of monomers containing silicon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2475/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
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Abstract
The invention provides a smooth coating liquid for aluminum-plastic films and a coating process thereof. The aluminum-plastic film smooth coating liquid has a good effect of remarkably reducing the friction coefficient of a nylon film, and can ensure that the dynamic friction coefficient of the nylon film is less than 0.30; can also be used for reducing the friction coefficient of the polypropylene film to ensure that the dynamic friction coefficient is less than 0.30. The coating process is double-sided simultaneous coating, and the coating sequence is that a polypropylene film surface is coated firstly, and then a polyamide film surface is coated. The coating process of the smooth coating liquid is simple, curing is not needed, low-temperature drying can be realized, the production efficiency can be effectively improved, and the economic cost can be saved. The aluminum plastic film product is coated with the smooth coating liquid, so that the deep drawing performance can be improved, and the stability of the friction coefficient under the high-temperature condition is ensured.
Description
Technical Field
The invention relates to the field of lithium battery packaging materials, in particular to an aluminum-plastic film smooth coating liquid and a coating process thereof.
Background
At present, the technology of the lithium ion battery is mature day by day, the lithium ion battery is widely applied to the fields of 3C electronic products, power batteries, energy storage and the like, and the usage amount of aluminum plastic film products used for soft packaging is increased more and more. In order to improve the drawing depth performance of the aluminum-plastic film, the friction coefficient of the surface of the aluminum-plastic film needs to be improved. In patent CN105453299B, an amide slipping agent is added to the sealing layer by internal addition. If the amount of the lubricant is not controlled well, the lubricant precipitates excessively on the surface, and white powder is generated on the molding surface of the drawing die (the lubricant is deposited). In order to achieve a good penetration depth, the white powder needs to be removed periodically, which affects the production efficiency. In patent CN110041817A, a smooth coating is formed by using auxiliaries such as silica, silicone resin, and isocyanate, which can effectively reduce the friction coefficient, but the two-component structure is adopted, the oven temperature is high, and the economic cost is high. Meanwhile, the isocyanate curing agent used in the coating slip liquid is deblocked at high temperature, but slowly reacts at normal temperature, so that the slip coating liquid has certain timeliness. Jp 2002-216713 and jp 2002-216714 a propose an outer packaging material in which a fatty acid amide-based slip agent is applied or sprayed on at least the surface of a base material layer, and this poor control still involves a risk of powder falling and a problem of migration into the film, and as time goes on, the friction coefficient gradually increases, resulting in deterioration of the drawing performance of the product.
Disclosure of Invention
In order to solve the problems mentioned in the background technology, the invention provides an aluminum-plastic film smooth coating liquid and a coating process thereof.
In order to realize the purpose of the invention, the technical scheme is as follows:
the smooth aluminum-plastic film coating liquid consists of organic siloxane, leveling agent, organic silicon resin, organic solvent and water.
Further, the organic siloxane is high molecular weight organic siloxane, the molecular weight of the organic siloxane is 100-200 ten thousand, and the content of the organic siloxane is 0.05-3.0 wt%.
The leveling agent is polyether modified siloxane, and the content of the polyether modified siloxane is 0.05 wt% -2.0 wt%.
The organic silicon resin is one or more of silicon-polyurethane copolymer and silicon-acrylic acid copolymer, and the content of the organic silicon resin is 0.05 wt% -5.0 wt%.
The organic solvent is one or more of alcohol solvents or ester solvents, the content of the organic solvent is 80.0 wt% -98.85 wt%, and one or more of low-boiling point ethanol, isopropanol and ethyl ester are further preferred.
The water is industrial distilled water, and the content of the water is 1.0 wt% -10.0 wt%.
The coating process comprisesAnd (3) double-sided coating, wherein the coating sequence is that the polypropylene film side is coated firstly, and the polyamide film side is coated. The coating process is that the temperature of the oven is 40-85 ℃, and the production speed is 20-80 m/min. The wet glue amount of the coating liquid is 2-20g/m2。
The smooth coating liquid for the aluminum plastic film can be simultaneously used for a polyamide film and a polypropylene film. The smooth coating liquid can solve the problem of powder falling in downstream production, simultaneously solves the problem of migration of a smooth agent, and ensures the long-term stability of the friction coefficient. The coating liquid has a good effect of remarkably reducing the friction coefficient of the nylon film, and the dynamic friction coefficient of the coating liquid is less than 0.30; can also be used for reducing the friction coefficient of the polypropylene film to ensure that the dynamic friction coefficient is less than 0.30. Meanwhile, the smooth coating liquid is not a reaction type coating liquid, can be stored for a long time, and is dried at low temperature, so that the production cost is reduced. The coating process of the smooth coating liquid is simple, curing is not needed, low-temperature drying can be realized, the production efficiency can be effectively improved, and the economic cost can be saved. The aluminum plastic film product is coated with the smooth coating liquid, so that the deep drawing performance can be improved, and the stability of the friction coefficient under the high-temperature condition is ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described below. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The smooth aluminum-plastic film coating liquid consists of organic siloxane, leveling agent, organic silicon resin, organic solvent and water.
The organic siloxane is high molecular weight organic siloxane, the molecular weight of the organic siloxane is 100-200 ten thousand, and the content of the organic siloxane is 0.05-3.0 wt%.
The leveling agent is polyether modified siloxane, and the content of the polyether modified siloxane is 0.05 wt% -2.0 wt%.
The organic silicon resin is one or more of silicon-polyurethane copolymer and silicon-acrylic acid copolymer, and the content of the organic silicon resin is 0.05 wt% -5.0 wt%.
The organic solvent is one or more of alcohol solvents or ester solvents, the content of the organic solvent is 80.0 wt% -98.85 wt%, and one or more of low-boiling point ethanol, isopropanol and ethyl ester are further preferred.
The water is industrial distilled water, and the content of the water is 1.0 wt% -10.0 wt%.
The process method comprises the following steps:
the invention relates to a smooth coating liquid for coating an aluminum-plastic film of a lithium battery packaging material, wherein the aluminum-plastic film is composed of a polyamide film, an aluminum foil and a polypropylene film, and the coating process of the smooth coating liquid can adopt a single-side coating mode or a double-side coating mode. In order to improve the production efficiency, the invention adopts a double-sided coating mode, and the coating process comprises the following steps: coating polypropylene film surface first and then polyamide film surface, the wet glue amount of the coating liquid is 2-20g/m2. Then baking the polypropylene film in an oven during operation, wherein the temperature of the polypropylene film surface oven is set to be 40-75 ℃; the temperature of the polyamide film surface oven is set to be 45-85 ℃, and the production speed for maintaining the temperature is 20-80 m/min.
Example 1
The coating solution consists of 0.05 wt% of organic siloxane, 0.05 wt% of flatting agent, 0.05 wt% of organic silicon resin, 98.85 wt% of ethyl ester and 1.0 wt% of water; the production speed is 50m/min, and the wet glue amount is 20.0g/m2。
Example 2
The coating solution consists of 0.5 wt% of organic siloxane, 0.1 wt% of flatting agent, 0.1 wt% of organic silicon resin, 89.3 wt% of ethyl ester, 5.0 wt% of ethanol and 5.0 wt% of water; the production speed is 45m/min, and the wet glue amount is 5.0g/m2。
Example 3
The coating solution consists of 0.5 wt% of organic siloxane, 0.1 wt% of flatting agent, 0.5 wt% of organic silicon resin, 88.9 wt% of ethanol and 10.0 wt% of water; the production speed is 35m/min, and the wet glue amount is 10.0g/m2。
Comparative example 1
Finished film without coating slip agent
Comparative example 2
Finished film coated with amide slipping agent
The finished film used in the test was 113um with a structure of polyamide film 25 um/aluminum foil 40 um/polypropylene film 40 um.
Coefficient of friction:
the following measurement data are data of the finished film of 113um immediately after the coating of the slip agent.
TABLE 1 coefficient of friction of the finished film immediately after coating
TABLE 240 ℃ change of coefficient of dynamic friction of CPP surface with time
And (3) heat sealing conditions: 180 ℃ at 210 ℃ for 3-5s and 0.3-0.5 MPa; the test film material was 113um finished film.
TABLE 340 ℃ Heat seal Strength of finished film as a function of time
As can be seen from Table 3, the application of both silicone-based and amide-based slip agents reduced the heat seal strength of the polypropylene film, but met the use requirements of > 50N/15 mm. In order to meet the requirement of the heat seal strength of the aluminum plastic film, the gluing amount of the slipping agent is strictly controlled when the polypropylene film is coated.
Claims (6)
1. The aluminum-plastic film smooth coating liquid is characterized by comprising the following components in parts by weight: the coating liquid consists of organic siloxane, a flatting agent, organic silicon resin, an organic solvent and water; the content of the organic siloxane in the coating liquid is 0.05 wt% -3.0 wt%; the content of the flatting agent in the coating liquid is 0.05 wt% -2.0 wt%; the content of the organic silicon resin in the coating liquid is 0.05 wt% -5.0 wt%; the content of the organic solvent in the coating liquid is 80.0-98.85 wt%; the content of the water in the coating liquid is 1.0-10.0 wt%; the organic siloxane is high molecular weight organic siloxane, and the molecular weight of the organic siloxane is 100-200 ten thousand; the leveling agent is polyether modified siloxane; the organic silicon resin is one or more of a silicon-polyurethane copolymer and a silicon-acrylic acid copolymer.
2. The aluminum-plastic film slipping coating liquid according to claim 1, wherein the organic solvent is one or more of an alcohol solvent and an ester solvent.
3. The aluminum-plastic film slipping coating liquid according to claim 2, wherein the alcohol-based solvent or ester-based solvent is one or more of low-boiling ethanol, isopropanol and ethyl ester.
4. The aluminum-plastic film slipping coating liquid according to claim 1, wherein the water is industrial distilled water.
5. A coating process of a smooth coating liquid for an aluminum-plastic film coats the aluminum-plastic film of a lithium battery packaging material, wherein the aluminum-plastic film is composed of a polyamide film, an aluminum foil and a polypropylene film, and is characterized in that the coating process is double-sided coating, and the coating sequence comprises the steps of coating the polypropylene film surface firstly and then coating the polyamide film surface; the wet glue amount of the coating liquid is 2-20g/m2(ii) a The aluminum-plastic film slipping coating liquid is the aluminum-plastic film slipping coating liquid according to any one of claims 1 to 4.
6. The coating process of the aluminum-plastic film smooth coating liquid as claimed in claim 5, wherein the coated aluminum-plastic film is baked in an oven in operation, and the temperature of the polypropylene film surface oven is set to 40-75 ℃; the temperature of the polyamide film surface oven is set to be 45-85 ℃, and the production speed for maintaining the temperature is 20-80 m/min.
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| CN113415053B (en) * | 2020-08-14 | 2022-07-29 | 厦门长塑实业有限公司 | Coating type polyamide film suitable for aluminum plastic film and preparation method thereof |
| CN112018276A (en) * | 2020-08-21 | 2020-12-01 | 苏州新景新材料科技有限公司 | Method for improving deep punching performance of aluminum-plastic film |
| CN111978865A (en) * | 2020-08-28 | 2020-11-24 | 珠海市赛日包装材料有限公司 | Smooth liquid for aluminum plastic film, preparation method of smooth liquid and aluminum plastic film |
| CN116814147B (en) * | 2023-08-28 | 2024-05-07 | 河南银金达新材料股份有限公司 | Coating liquid of water-based high-smoothness antistatic coating layer and preparation method thereof |
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| JPH11349644A (en) * | 1998-06-10 | 1999-12-21 | Chisso Corp | Polyorganosiloxane copolymer composition |
| JP2005179490A (en) * | 2003-12-19 | 2005-07-07 | Toyo Ink Mfg Co Ltd | Aqueous coating agent composition |
| CN1315961C (en) * | 2005-06-16 | 2007-05-16 | 海南赛诺实业有限公司 | Separated coating film and its preparation process |
| CN101724309A (en) * | 2008-10-31 | 2010-06-09 | 道康宁（上海）有限公司 | Additive for non-stick coating composite and cooking utensil with solidifying coating containing additive |
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