CN115556393A - Preparation method of black aluminum-plastic film with high punching depth and high corrosion resistance - Google Patents

Preparation method of black aluminum-plastic film with high punching depth and high corrosion resistance Download PDF

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Publication number
CN115556393A
CN115556393A CN202211252107.6A CN202211252107A CN115556393A CN 115556393 A CN115556393 A CN 115556393A CN 202211252107 A CN202211252107 A CN 202211252107A CN 115556393 A CN115556393 A CN 115556393A
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layer
plastic film
black
aluminum
aluminum foil
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单化众
吕松
全鑫
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Changzhou Sveck Photovoltaic New Material Co ltd
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Changzhou Sveck Photovoltaic New Material Co ltd
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    • 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
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • 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
    • 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
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—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
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • 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
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
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  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention provides a preparation method of a black aluminum-plastic film with high drawing depth and high corrosion resistance, which comprises the following steps: deoiling the aluminum foil layer; performing anticorrosive treatment operation on the aluminum foil layer; carrying out double-layer co-extrusion polypropylene casting film layer spraying and laminating operation; fusing and pressing; and compounding the nylon outer protective layer and the aluminum foil layer-heat sealing layer composite semi-finished product through an adhesive, and sending the black aluminum-plastic film semi-finished product to a micro-concave coating mechanism from an unwinding mechanism for coating and passivating to obtain the black aluminum-plastic film with high punching depth and high corrosion resistance. By the method, the frosted coating is passivated, so that the corrosion resistance of the black aluminum-plastic film frosted coating is improved, and the peeling phenomenon of the outer frosted coating under the high-temperature and high-humidity conditions is improved; by improving the formula of the cast polypropylene film layer, the stretching and drawing performance of the cast polypropylene film layer is improved, and the problem that the stretching and drawing performance of the traditional black aluminum plastic film is reduced due to the addition of carbon powder and a dispersing agent in the black adhesive layer is solved.

Description

Preparation method of black aluminum-plastic film with high punching depth and high corrosion resistance
Technical Field
The invention belongs to the technical field of composite films, and particularly relates to a preparation method of a black aluminum-plastic film with high drawing depth and high corrosion resistance.
Background
At present, the aluminum plastic film adopts the traditional thermal compounding process and is applied to the manufacture of batteries of most digital electronic products. The existing aluminum plastic film generally has a frosted coating, and when the existing aluminum plastic film is contacted with electrolyte or other organic solvent liquids, the phenomenon of corrosion can occur; the frosted coating of the outer layer can flake off under high temperature and humidity conditions (100 c, humidity > 90%) resulting in an unacceptable appearance. In addition, the traditional black aluminum-plastic film can cause the reduction of the drawing depth performance due to the addition of the carbon powder and the dispersing agent in the black first adhesive layer, and the use of customers is seriously influenced.
Therefore, it is necessary to develop a black aluminum plastic film with high drawing depth and high corrosion resistance to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem of providing a preparation method of a black aluminum-plastic film with high drawing depth and high corrosion resistance.
In order to solve the technical problems, the invention provides a preparation method of a black aluminum-plastic film with high drawing depth and high corrosion resistance, which comprises the following steps:
(1) Deoiling of the aluminum foil layer: selecting a cold-rolled process aluminum foil with the thickness of 25-65 mu m, using an alkaline degreasing agent to remove oil, cleaning and drying to obtain a clean aluminum foil;
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: coating an anticorrosive treatment agent on the bright surface and the matte surface of the clean aluminum foil by using a coating production line to form an anticorrosive aluminum foil layer, wherein the thickness of the anticorrosive aluminum foil layer is 200nm-1 mu m, drying the anticorrosive aluminum foil layer by using an oven, and then rolling the anticorrosive aluminum foil layer for later use;
(3) Carrying out double-layer co-extrusion polypropylene casting film layer spraying and compounding operation: sending the anticorrosion aluminum foil layer to a spraying mechanism, extruding a heat-sealing material by using a screw extruder of the spraying mechanism, extruding the material from a die head of the screw extruder, then spraying a film to the bright smooth surface, and cooling to form an aluminum foil layer-heat-sealing layer composite semi-finished product;
(4) Melting and pressing operation: heating, melting and pressing the aluminum foil layer-heat sealing layer composite semi-finished product for the second time, cooling and rolling for later use;
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the nylon outer protective layer from the unwinding mechanism to a coating composite mechanism, compounding the nylon outer protective layer and the aluminum foil layer-heat sealing layer composite semi-finished product through a black adhesive, and heating and reacting through an oven to obtain a black aluminum plastic film semi-finished product;
(6) And sending the black aluminum-plastic film semi-finished product to a micro-concave coating mechanism from an unreeling mechanism, uniformly coating the anti-corrosion frosted coating on the nylon outer protective layer, carrying out passivation treatment by an ultraviolet passivation treatment mechanism after heating reaction in an oven, checking the treatment effect by a color difference meter, and rolling to obtain the high-punching-depth and high-corrosion-resistance black aluminum-plastic film.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high penetration depth and high corrosion resistance, in the step (1), the alkaline degreasing agent comprises a metal surfactant, a builder and water, the metal surfactant is any one of nonylphenol polyoxyethylene ether, polyoxyethylene octylphenol ether and triethanolamine oleate soap, the builder is sodium tripolyphosphate, the mass percentage of the metal surfactant in the degreasing agent is 16% -22%, and the mass percentage of the builder in the degreasing agent is 8% -15%.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high drawing depth and high corrosion resistance, the anti-corrosion treating agent in the step (2) is trivalent chromium or trivalent cesium, the production running speed of the coating production line is 50m/min-120m/min, the heating temperature of the oven is 80 ℃ to 280 ℃, and the heating time is 2 seconds to 4 seconds.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high punching depth and high corrosion resistance, the production running speed of the polypropylene heat-seal layer spraying and repeating operation in the step (3) is 50-80 m/min.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high punching depth and high corrosion resistance, the heat-seal material in the step (3) comprises an outer layer raw material and an inner layer raw material, the screw extruder is a double-layer co-extrusion device, the double-layer co-extrusion device comprises a No. 1 extruder and a No. 2 extruder, and polypropylene raw material particles, a POE elastomer and non-migrating modified erucamide are added into the No. 1 extruder and mixed to obtain the outer layer raw material; adding maleic anhydride grafted polypropylene particles, a modified PP elastomer and non-migrating modified erucamide particles into the No. 2 extruder, and mixing to obtain the inner layer raw material, wherein the processing temperature of the No. 1 extruder is 260 ℃, the internal pressure of the No. 1 extruder is 75bar, the processing temperature of the No. 2 extruder is 270 ℃, the internal pressure of the No. 2 extruder is 90bar, a No. 1 filtering device is arranged between the No. 1 extruder and the No. 1 membrane head, a No. 2 filtering device is arranged between the No. 2 extruder and the No. 2 membrane head, the filtering screens of the No. 1 filtering device and the No. 2 filtering device are 3-5 layers, the mesh number of each layer of filtering screen is 50-500 meshes/square inch, and the heating temperature of the No. 1 die head and the No. 2 die head is 275 ℃; the cooling uses a first cooling roller, the cooling temperature of the first cooling roller is 10-60 ℃, the diameter of the first cooling roller is 1000mm, the pressure of a compression roller is 0.3Mpa, and the total thickness of the double-layer co-extrusion polypropylene casting film layer is 45 mu m.
As a preferable scheme of the preparation method of the black aluminum plastic film with high drawing depth and high corrosion resistance, the mass percentages of the polypropylene raw material particles, the POE elastomer and the non-migrating modified erucyl particles are 85%, 10% and 5% respectively, the grafting ratio of the maleic anhydride grafted polypropylene particles is 3%, the mass percentages of the maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migrating modified erucyl amide particles are 70%, 25% and 5% respectively, and the thickness ratio of the outer layer to the inner layer is 1:1.
as a preferable scheme of the preparation method of the black aluminum-plastic film with high drawing depth and high corrosion resistance, the secondary heating in the step (4) needs a first heating roller, a second heating roller and a third heating roller, the heating temperature of the first heating roller is 90 ℃, the heating temperature of the second heating roller is 170 ℃, the heating temperature of the third heating roller is 185 ℃, the diameters of the first heating roller, the second heating roller and the third heating roller are all 600mm, the cooling uses a second cooling roller, the cooling temperature of the second cooling roller is 28-35 ℃, the diameter of the second cooling roller is 600mm, and the pressing pressure is 0.15-0.25 MPa.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high drawing depth and high corrosion resistance, in the step (5), the black adhesive takes polyisocyanate as a main agent, polyester polyol as a curing agent, black carbon powder and a dispersant mainly comprising polyacrylamide are added, and a solvent is ethyl acetate, wherein the corresponding mass percentages of the ethyl acetate, the polyisocyanate, the polyester polyol, the dispersant mainly comprising polyacrylamide and the black carbon powder are 45:40:10:4.5:0.5, the heating temperature is 50-80 ℃, the heating time is 2-3 seconds, the production speed of the step (5) is 20-60 m/min, and the composite pressure is 0.15-0.25 MPa.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high drawing depth and high corrosion resistance, the corrosion-resistant frosted coating in the step (6) comprises 60% of a solvent, 35% of an ultraviolet curing resin, 1% of a dispersant, 1% of a slipping assistant, 1% of frosted particles and 2% of an ultraviolet passivation treating agent.
As a preferable scheme of the preparation method of the black aluminum-plastic film with high drawing depth and high corrosion resistance, in the step (6), the diameter of a micro-concave coating roller of the micro-concave coating mechanism is 50mm, the mesh number is 200 meshes, the mesh depth is 1-3 μm, a heating area of the oven is sequentially divided into 1 area, 2 area and 3 area, the corresponding temperature of the 1 area, 2 area and 3 area is 200 ℃, 220 ℃ and 240 ℃, and the wavelength of the ultraviolet passivation treatment mechanism is set to 254-400nm.
Compared with the prior aluminum-plastic composite film technology, the preparation method of the black aluminum-plastic film with high punching depth and high corrosion resistance provided by the invention has the advantages that:
1. the frosted coating is passivated, so that the corrosion resistance of the black aluminum-plastic film frosted coating is improved, and the peeling phenomenon of the outer frosted coating under the conditions of high temperature and high humidity is improved;
2. by improving the formula of the cast polypropylene film layer, the stretching and drawing performance of the cast polypropylene film layer is improved, and the problem that the stretching and drawing performance of the traditional black aluminum plastic film is reduced due to the addition of carbon powder and a dispersing agent in the black adhesive layer is solved.
Detailed Description
The invention relates to a high-punching-depth and high-corrosion-resistance black aluminum-plastic film, which comprises a high-punching-depth cast polypropylene film layer, an aluminum foil layer, an outer protection layer and a corrosion-resistance frosted coating which are sequentially arranged; and a black adhesive layer is coated between the aluminum foil layer and the outer protective layer. The invention uses a thermal compounding process to manufacture the aluminum foil layer and the cast polypropylene film layer for thermal compounding, and the cast polypropylene film layer, the aluminum foil layer and the outer protection layer are compounded by heating and pressurizing.
The present invention will be described in further detail with reference to specific embodiments in order to make the above objects, features and advantages more apparent and understandable.
First, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The invention relates to a novel black aluminum-plastic film with high punching depth and high corrosion resistance, which comprises the following specific operation steps:
(1) Deoiling of the aluminum foil layer: degreasing and cleaning 25-65 mu m of cold-rolled technical aluminum foil by using an alkaline degreasing agent, and drying for later use; the alkaline oil remover mainly comprises a metal surfactant (any one of nonylphenol polyoxyethylene ether, polyoxyethylene octylphenol ether and triethanolamine oleate soap) and a builder (sodium tripolyphosphate), wherein the combination of the nonylphenol polyoxyethylene ether and the sodium tripolyphosphate is generally selected, so that the cleaning effect can be obviously improved, the mass percentages of the nonylphenol polyoxyethylene ether and the sodium tripolyphosphate are respectively 16% -22% and 8% -15%, and the balance of water.
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: and sending the aluminum foil layer from the unwinding mechanism (1) to the coating mechanism (1), coating an anti-corrosion treatment agent on the bright smooth surface and the matte surface of the deoiled and dried aluminum foil by using a coating production line to form an anti-corrosion layer with the surface thickness of 200nm-1 mu m, heating the anti-corrosion layer in an oven for 2-4 seconds at the heating temperature of 80-280 ℃, and then rolling the anti-corrosion layer for later use. The production running speed of the coating production line is 50-120 m/min; the corrosion-resistant treating agent is generally oxidized by trivalent chromium or trivalent cesium atoms, and trivalent cesium is recommended to be used, so that compared with trivalent chromium, an oxidation product is non-toxic and environment-friendly.
(3) And (3) spraying and repeating the polypropylene heat-sealing layer: sending the aluminum foil layer to a spraying and recovering mechanism, extruding a heat-sealing material by using a screw extruder of the spraying and recovering mechanism, extruding the heat-sealing material from a die head of the screw extruder, and then spraying a film to a bright surface of the aluminum foil layer to form an aluminum foil layer-heat sealing layer composite semi-finished product; the production running speed is 50m/min-80m/min; wherein the procedure uses double-layer co-extrusion equipment with two extruders, the two extruders are named as No. 1 extruder and No. 2 extruder respectively, and polypropylene raw material particles, POE elastomer and non-migrating modified erucamide are added into the extruder (1) to obtain an outer layer (1); adding maleic anhydride grafted polypropylene particles (grafting ratio of 3%), a modified PP elastomer and non-migrating modified erucamide particles into an extruder (2), thereby obtaining an inner layer (2); wherein, the mass percentages of the No. 1 extruder polypropylene raw material particles, the POE elastomer and the non-migratory modified erucic acid acyl particles are respectively 85%, 10% and 5%, and the mass percentages of the No. two extruder maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migratory modified erucic acid amide particles are respectively 70%, 25% and 5%. When the mass percent of the non-migrating modified erucamide particles is 1-4%, the punching depth performance is not optimal; when the mass percentage of the non-migrating modified erucamide particles exceeds 5%, the rolling can show in a deviation manner in the processing process, so that the appearance is poor; therefore, 5% is the optimum addition ratio. The processing temperature of an extruder 1 is set to be 260 ℃, the internal pressure of the extruder is 75bar, the processing temperature of an extruder 2 is 270 ℃, the internal pressure of the extruder is 90bar, a filtering device (1) and a filtering device (2) are arranged between the extruder and a membrane head, 3-5 layers of filter screens are used, the mesh number of the filter screens is 50-500 meshes/square inch, the materials are extruded into a membrane forming die head through the pushing of a screw rod, a membrane shape is formed after the materials pass through the membrane head, the flowing membrane-shaped resin is cooled by a cooling roller to form a double-layer co-extrusion polypropylene cast membrane, and the heating temperature of the die head is 275 ℃; the temperature of the cooling roller (1) is 10-60 ℃, the diameter of the cooling roller is 1000mm, the pressure of a compression roller is 0.3mpa, the total thickness of the polypropylene casting film is 45 mu m, and the thickness ratio of the layer (1) to the layer (2) is 1/1.
(4) The semi-finished product after the primary compounding is continuously subjected to secondary heating, melting and pressing to enhance the stripping force, and is cooled and then wound into a winding unit for standby; the temperature of the heating roller (1) for secondary heating is 90 ℃, the temperature of the heating roller (2) is 170 ℃, the temperature of the heating roller (3) is 185 ℃, the diameter of the heating roller is 600mm, the cooling temperature of the cooling roller (2) is 28-35 ℃, the diameter of the cooling roller (2) is 600mm, and the pressing pressure is 0.15-0.25 Mpa.
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the outer protective layer from the unwinding mechanism to a coating composite mechanism, compounding the nylon outer protective layer with a black adhesive component and the aluminum foil layer-heat sealing layer composite semi-finished product, heating and reacting through an oven to obtain the semi-finished product, wherein the black adhesive component takes polyisocyanate as a main agent, polyester polyol as a curing agent, black carbon powder and a dispersing agent mainly comprising polyacrylamide are added, and the solvent adopts ethyl acetate, wherein ethyl acetate, polyisocyanate, polyester polyol, the dispersing agent mainly comprising polyacrylamide and black carbon powder; the corresponding mass percentage is 45:40:10:4.5:0.5 aging at 55-90 deg.C to form secondary reactant (allophanate) to enhance bonding strength and structural strength, increase deep-drawing performance and peel strength, heating oven temperature of 50-80 deg.C, heating time of 2-3 s, production speed of 20-60 m/min, and composite pressure of 0.15-0.25 Mpa;
(6) Send above-mentioned semi-manufactured goods of plastic-aluminum membrane to slightly concave coating mechanism from unwinding mechanism, evenly scribble anticorrosive dull polish coating to outer protective layer on, after oven heating reaction, carry out passivation treating through ultraviolet passivation processing mechanism, through color difference appearance inspection treatment effect, final rolling obtains finished product plastic-aluminum membrane, wherein anticorrosive dull polish coating's composition is: solvent (methanol and water 1:1 mixed) 60%; 35% of ultraviolet light curing resin (polyurethane acrylate), 1% of dispersant (polyacrylamide is main), 1% of slipping auxiliary agent (oily erucamide), 1% of frosted particles (diameter of 1-3 um) and 1% of ultraviolet light passivation treating agent (H) 2 O 2 1％；FeSO 4 ·7H 2 O1%). Wherein, the heating area 1,2,3 of the oven corresponds to the temperature of 200 ℃, 220 ℃ and 240 ℃; the wavelength of the ultraviolet light passivation device is 254-400nm, the diameter of the micro-concave coating roll is 50mm, the mesh number is 200 meshes, and the mesh depth is 1-3 mu m.
For a detailed description and related comparison, see the following examples:
example 1
The invention relates to a novel black aluminum-plastic film with high punching depth and high corrosion resistance, which comprises the following specific operation steps:
(1) Deoiling of the aluminum foil layer: degreasing and cleaning 25 mu m of cold-rolled technical aluminum foil by using an alkaline degreasing agent, and drying for later use; the main components of the alkaline oil removing agent are polyoxyethylene octyl phenol ether and sodium tripolyphosphate, the mass percentage is 16 percent and 15 percent respectively, and the rest is water.
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: and (3) sending the aluminum foil layer from the unwinding mechanism (1) to the coating mechanism (1), coating an anti-corrosion treatment agent on the bright smooth surface and the matte surface of the deoiled and dried aluminum foil by using a coating production line to form an anti-corrosion layer with the surface thickness of 200nm, reacting and drying at the heating temperature of 80 ℃ through an oven for 4 seconds, and then rolling for later use. The production running speed of the coating production line is 50m/min; the corrosion preventing agent is oxidized by trivalent chromium atoms.
(3) And (3) spraying and repeating the polypropylene heat-sealing layer: sending the aluminum foil layer to a spraying and recovering mechanism, extruding a heat-sealing material by using a screw extruder of the spraying and recovering mechanism, extruding the heat-sealing material from a die head of the screw extruder, and then spraying a film to a bright surface of the aluminum foil layer to form an aluminum foil layer-heat-sealing layer composite semi-finished product; the production running speed is 50m/min; wherein the procedure uses double-layer co-extrusion equipment with two extruders, the two extruders are named as No. 1 extruder and No. 2 extruder respectively, polypropylene raw material particles, POE elastomer and non-migratory modified erucamide are added into the extruder (1), so as to obtain an outer layer (1); adding maleic anhydride grafted polypropylene particles (grafting ratio of 3%), a modified PP elastomer and non-migrating modified erucamide particles into an extruder (2), thereby obtaining an inner layer (2); wherein, the mass percentages of the No. 1 extruder polypropylene raw material particles, the POE elastomer and the non-migratory modified erucic acid acyl particles are respectively 85%, 10% and 5%, and the mass percentages of the No. two extruder maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migratory modified erucic acid amide particles are respectively 70%, 25% and 5%. The processing temperature of an extruder 1 is set to be 260 ℃, the internal pressure of the extruder is 75bar, the processing temperature of an extruder 2 is 270 ℃, the internal pressure of the extruder is 90bar, a filtering device (1) and a filtering device (2) are arranged between the extruder and a film head, a filter screen is used for 3 layers, the mesh number of the filter screen is 50 meshes/square inch, the materials are extruded into a film forming die head through screw pushing, a film is formed after passing through the film head, the flowing film resin is cooled by a cooling roller to form a double-layer co-extrusion polypropylene cast film, and the heating temperature of the die head is 275 ℃; the temperature of the cooling roll (1) was 10 ℃, the diameter of the cooling roll was 1000mm, the pressure of the press roll was 0.3mpa, and the total thickness of the cast polypropylene film was 45 μm, and the thickness ratio of the (1) layer to the (2) layer was 1/1.
(4) The semi-finished product after the primary compounding is continuously subjected to secondary heating, melting and pressing to enhance the stripping force, and is cooled and then wound into a winding unit for standby; the temperature of the heating roller (1) for secondary heating is 90 ℃, the temperature of the heating roller (2) is 170 ℃, the temperature of the heating roller (3) is 185 ℃, the diameter of the heating roller is 600mm, the cooling temperature of the cooling roller (2) is 28 ℃, the diameter of the cooling roller (2) is 600mm, and the pressing pressure is 0.25Mpa.
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the outer protective layer from the unwinding mechanism to a coating composite mechanism, compounding the nylon outer protective layer with a black adhesive component and the aluminum foil layer-heat sealing layer composite semi-finished product, heating and reacting through an oven to obtain the semi-finished product, wherein the black adhesive component takes polyisocyanate as a main agent, polyester polyol as a curing agent, black carbon powder and a dispersing agent mainly comprising polyacrylamide are added, and the solvent adopts ethyl acetate, wherein ethyl acetate, polyisocyanate, polyester polyol, the dispersing agent mainly comprising polyacrylamide and black carbon powder; the corresponding mass percentage is 45:40:10:4.5:0.5 aging at 55 deg.C to form secondary reactant (allophanate) to enhance bonding strength and structural strength, increase deep-drawing performance and peel strength, heating oven temperature of 50 deg.C, heating time of 2 s, production speed of 20m/min, and composite pressure of 0.15Mpa;
(6) Send above-mentioned semi-manufactured goods of plastic-aluminum membrane to slightly concave coating mechanism from unwinding mechanism, evenly scribble anticorrosive dull polish coating to outer protective layer on, after oven heating reaction, carry out passivation treating through ultraviolet passivation processing mechanism, through color difference appearance inspection treatment effect, final rolling obtains finished product plastic-aluminum membrane, wherein anticorrosive dull polish coating's composition is: solvent (methanol and water 1:1 mixed) 60%; 35% of ultraviolet light curing resin (polyurethane acrylate), 1% of dispersing agent (polyacrylamide is main), 1% of smooth auxiliary agent (oily erucamide), 1% of frosted particles (diameter of 1 mu m), and 1% of ultraviolet light passivation treating agent (H) 2 O 2 1％；FeSO 4 ·7H 2 O1%). Wherein, the heating area 1,2,3 of the oven corresponds to the temperature of 200 ℃, 220 ℃ and 240 ℃; the wavelength of the ultraviolet light passivation device is set to be 254nm, the diameter of the micro-concave coating roll is 50mm, the mesh number is 200 meshes, and the mesh depth is 1 mu m.
Example 2
The invention relates to a novel black aluminum-plastic film with high punching depth and high corrosion resistance, which comprises the following specific operation steps:
(1) Deoiling of the aluminum foil layer: degreasing and cleaning 45 mu m cold-rolled technical aluminum foil by using an alkaline degreasing agent, and drying for later use; the alkaline oil removing agent mainly comprises nonylphenol polyoxyethylene ether and sodium tripolyphosphate, the mass percentage of the nonylphenol polyoxyethylene ether and the mass percentage of the sodium tripolyphosphate are respectively 20% and 12%, and the balance is water.
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: and (3) sending the aluminum foil layer from the unwinding mechanism (1) to the coating mechanism (1), coating an anti-corrosion treatment agent on the bright smooth surface and the matte surface of the deoiled and dried aluminum foil by using a coating production line to form an anti-corrosion layer with the surface thickness of 800nm, reacting and drying at the heating temperature of 200 ℃ through an oven for 3 seconds, and then rolling for later use. The production running speed of the coating production line is 100m/min; trivalent cesium is used as the preservative treatment agent.
(3) And (3) spraying and repeating the polypropylene heat-sealing layer: sending the aluminum foil layer to a spraying and recovering mechanism, extruding a heat-sealing material by using a screw extruder of the spraying and recovering mechanism, extruding the heat-sealing material from a die head of the screw extruder, and then spraying a film to a bright surface of the aluminum foil layer to form an aluminum foil layer-heat-sealing layer composite semi-finished product; the production running speed is 70m/min; wherein the procedure uses double-layer co-extrusion equipment with two extruders, the two extruders are named as No. 1 extruder and No. 2 extruder respectively, and polypropylene raw material particles, POE elastomer and non-migrating modified erucamide are added into the extruder (1) to obtain an outer layer (1); adding maleic anhydride grafted polypropylene particles (grafting ratio of 3%), a modified PP elastomer and non-migrating modified erucamide particles into an extruder (2), thereby obtaining an inner layer (2); wherein the mass percentages of the No. 1 extruder polypropylene raw material particles, the POE elastomer and the non-migratory modified erucic acid acyl particles are 85%, 10% and 5%, respectively, and the mass percentages of the No. two extruder maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migratory modified erucic acid acyl particles are 70%, 25% and 5%, respectively. The processing temperature of an extruder 1 is set to be 260 ℃, the internal pressure of the extruder is 75bar, the processing temperature of an extruder 2 is 270 ℃, the internal pressure of the extruder is 90bar, a filtering device (1) and a filtering device (2) are arranged between the extruder and a film head, a filter screen is used for 4 layers, the mesh number of the filter screen is 300 meshes/square inch, the materials are extruded into a film forming die head through screw pushing, a film is formed after passing through the film head, the flowing film resin is cooled by a cooling roller to form a double-layer co-extrusion polypropylene cast film, and the heating temperature of the die head is 275 ℃; the temperature of the chill roll (1) was 40 ℃, the diameter of the chill roll was 1000mm, the pressure of the pressure roll was 0.3mpa, and the total thickness of the cast polypropylene film was 45 μm, and the thickness ratio of the (1) layer to the (2) layer was 1/1.
(4) The semi-finished product after the primary compounding is continuously subjected to secondary heating, melting and pressing to enhance the stripping force, and is cooled and then wound into a winding unit for standby; the temperature of the heating roller (1) for secondary heating is 90 ℃, the temperature of the heating roller (2) is 170 ℃, the temperature of the heating roller (3) is 185 ℃, the diameter of the heating roller is 600mm, the cooling temperature of the cooling roller (2) is 30 ℃, the diameter of the cooling roller (2) is 600mm, and the pressing pressure is 0.2Mpa.
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the outer protective layer from the unreeling mechanism to a coating composite mechanism, compounding the nylon outer protective layer with a black adhesive component and the aluminum foil layer-heat sealing layer composite semi-finished product, heating and reacting through an oven to obtain a semi-finished product, wherein the black adhesive component takes polyisocyanate as a main agent, polyester polyol as a curing agent, black carbon powder and a dispersant taking polyacrylamide as a main component are added, and the solvent adopts ethyl acetate, wherein ethyl acetate, polyisocyanate, polyester polyol, a dispersant taking polyacrylamide as a main component, and black carbon powder; the corresponding mass percentage is 45:40:10:4.5:0.5 aging at 70 deg.C to form secondary reactant (allophanate) to enhance bonding strength and structural strength, increase deep-drawing performance and peel strength, heating oven temperature of 70 deg.C, heating time of 3 s, production speed of 40m/min, and composite pressure of 0.2Mpa;
(6) Send above-mentioned semi-manufactured goods of plastic-aluminum membrane to slightly concave coating mechanism from unwinding mechanism, evenly scribble anticorrosive dull polish coating to outer protective layer on, after oven heating reaction, carry out passivation treating through ultraviolet passivation processing mechanism, through color difference appearance inspection treatment effect, final rolling obtains finished product plastic-aluminum membrane, wherein anticorrosive dull polish coating's composition is: solvent (methanol and water 1:1 mixed) 60%; 35% of ultraviolet light curing resin (polyurethane acrylate), 1% of dispersing agent (polyacrylamide is main), 1% of smooth auxiliary agent (oily erucamide), 1% of frosted particles (diameter of 2 mu m), and 1% of ultraviolet light passivation treating agent (H) 2 O 2 1％；FeSO 4 ·7H 2 O1%). Wherein, the heating area 1,2,3 of the oven corresponds to the temperature of 200 ℃, 220 ℃ and 240 ℃; the wavelength of the ultraviolet light passivation device is set to be 300nm, the diameter of the micro-concave coating roll is 50mm, the mesh number is 200 meshes, and the mesh depth is 2 microns.
Example 3
The invention relates to a novel black aluminum-plastic film with high punching depth and high corrosion resistance, which comprises the following specific operation steps:
(1) Deoiling of the aluminum foil layer: degreasing and cleaning 65 mu m cold-rolled technical aluminum foil by using an alkaline degreasing agent, and drying for later use; the alkaline degreasing agent mainly comprises 22% by mass of triethanolamine oleate soap and 8% by mass of sodium tripolyphosphate, and the balance of water.
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: and (2) sending the aluminum foil layer from the unwinding mechanism (1) to the coating mechanism (1), coating an anti-corrosion treatment agent on the bright smooth surface and the matte surface of the deoiled and dried aluminum foil by using a coating production line to form an anti-corrosion layer with the surface thickness of 1 mu m, reacting and drying at the heating temperature of 280 ℃ through an oven for 2 seconds, and then rolling for later use. The production running speed of the coating production line is 120m/min; the corrosion-preventing treatment agent is subjected to oxidation treatment by using trivalent cesium atoms.
(3) And (3) spraying and repeating the polypropylene heat-sealing layer: sending the aluminum foil layer to a spraying and recovering mechanism, extruding a heat-sealing material by using a screw extruder of the spraying and recovering mechanism, extruding the heat-sealing material from a die head of the screw extruder, and then spraying a film to a bright surface of the aluminum foil layer to form an aluminum foil layer-heat sealing layer composite semi-finished product; the production running speed is 80m/min; wherein the procedure uses double-layer co-extrusion equipment with two extruders, the two extruders are named as No. 1 extruder and No. 2 extruder respectively, and polypropylene raw material particles, POE elastomer and non-migrating modified erucamide are added into the extruder (1) to obtain an outer layer (1); adding maleic anhydride grafted polypropylene particles (grafting ratio of 3%), a modified PP elastomer and non-migrating modified erucamide particles into an extruder (2), thereby obtaining an inner layer (2); wherein, the mass percentages of the No. 1 extruder polypropylene raw material particles, the POE elastomer and the non-migratory modified erucic acid acyl particles are respectively 85%, 10% and 5%, and the mass percentages of the No. two extruder maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migratory modified erucic acid amide particles are respectively 70%, 25% and 5%. When the mass percent of the non-migrating modified erucamide particles is 1-4%, the punching depth performance is not optimal; when the mass percentage of the non-migrating modified erucamide particles exceeds 5%, the rolling can show in a deviation manner in the processing process, so that the appearance is poor; therefore, 5% is the optimum addition ratio. The processing temperature of an extruder 1 is set to be 260 ℃, the internal pressure of the extruder is 75bar, the processing temperature of an extruder 2 is 270 ℃, the internal pressure of the extruder is 90bar, a filtering device (1) and a filtering device (2) are arranged between the extruder and a film head, a filter screen is used for 5 layers, the mesh number of the filter screen is 500 meshes/square inch, the materials are extruded into a film forming die head through screw pushing, a film is formed after passing through the film head, the flowing film resin is cooled by a cooling roller to form a double-layer co-extrusion polypropylene cast film, and the heating temperature of the die head is 275 ℃; the temperature of the cooling roll (1) was 60 ℃, the diameter of the cooling roll was 1000mm, the pressure of the press roll was 0.3mpa, and the total thickness of the cast polypropylene film was 45 μm, and the thickness ratio of the (1) layer to the (2) layer was 1/1.
(4) The semi-finished product after the primary compounding is continuously subjected to secondary heating, melting and pressing to enhance the stripping force, and is cooled and then wound into a winding unit for standby; the temperature of the heating roller (1) for secondary heating is 90 ℃, the temperature of the heating roller (2) is 170 ℃, the temperature of the heating roller (3) is 185 ℃, the diameter of the heating roller is 600mm, the cooling temperature of the cooling roller (2) is 35 ℃, the diameter of the cooling roller (2) is 600mm, and the pressing pressure is 0.15Mpa.
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the outer protective layer from the unreeling mechanism to a coating composite mechanism, compounding the nylon outer protective layer with a black adhesive component and the aluminum foil layer-heat sealing layer composite semi-finished product, heating and reacting through an oven to obtain a semi-finished product, wherein the black adhesive component takes polyisocyanate as a main agent, polyester polyol as a curing agent, black carbon powder and a dispersant taking polyacrylamide as a main component are added, and the solvent adopts ethyl acetate, wherein ethyl acetate, polyisocyanate, polyester polyol, a dispersant taking polyacrylamide as a main component, and black carbon powder; the corresponding mass percentage is 45:40:10:4.5:0.5 aging at 90 deg.C to form secondary reactant (allophanate) to enhance bonding strength and structural strength, and increase deep punching performance and peel strength, wherein the heating oven temperature is 80 deg.C, the heating time is 3 s, the production speed is 60m/min, and the composite pressure is 0.25Mpa;
(6) Send above-mentioned semi-manufactured goods of plastic-aluminum membrane to slightly concave coating mechanism from unwinding mechanism, evenly scribble anticorrosive dull polish coating to outer protective layer on, after oven heating reaction, carry out passivation treating through ultraviolet passivation processing mechanism, through color difference appearance inspection treatment effect, final rolling obtains finished product plastic-aluminum membrane, wherein anticorrosive dull polish coating's composition is: solvent (methanol and water 1:1 mixed) 60%; 35% of ultraviolet light curing resin (polyurethane acrylate), 1% of dispersing agent (polyacrylamide is main), 1% of smooth auxiliary agent (oily erucamide), 1% of frosted particles (diameter of 3 mu m), and 1% of ultraviolet light passivation treating agent (H) 2 O 2 1％；FeSO 4 ·7H 2 O1％). Wherein, the heating area 1,2,3 of the oven corresponds to the temperature of 200 ℃, 220 ℃ and 240 ℃; the wavelength of the ultraviolet light passivation device is set to be 400nm, the diameter of the micro-concave coating roll is 50mm, the mesh number is 200 meshes, and the mesh depth is 3 mu m.
Comparative example 1
The other steps were the same as in example 2, but without formulation optimization of the inner and outer layers in step 3.
Comparative example 2
The other steps are the same as example 2, but in step 3, the formulation of the outer layer is 86-89% of polypropylene raw material particles, 10% of POE elastomer and 1-4% of non-migrating modified erucyl particles.
Comparative example 3
The other steps were the same as in example 2, but without optimization of the formulation of the black adhesive in step 5.
Comparative example 4
The other steps are the same as example 2, but the formula ratio of the black adhesive in step 5 is 45.
Comparative example 5
The other steps are the same as example 2, but in step 6, the UV passivation treatment is not performed, and the solvent (methanol and water 1:1 mixed) is 60%; 36% of curing resin (polyurethane or acrylate), 1% of dispersing agent (polyacrylamide is used as main component), 1% of slipping auxiliary agent (oily erucamide) and 1% of frosted particles (diameter of 1-3 mu m).
Comparative example 6
The other steps are the same as in example 2, but in step 6 the coating composition ratio is not determined.
Comparative examples and examples the test results are shown in tables 1 to 2 below.
Figure BDA0003888089570000121
Figure BDA0003888089570000131
TABLE 1
Figure BDA0003888089570000132
TABLE 2
Note: the Baige test, also known as an adhesion test, is an important test means for evaluating the surface adhesion of steel plate test paints, varnishes, conversion materials, metal coatings, coatings and related products, and is used for judging the grading of adhesion test results. The Baige test is suitable for the adhesive coating with the surface coating thickness of more than 0-50 mu m and 50-125 mu m.
Thickness of coating Distance between lines Number of lines drawn
0～50μm 1mm 11
50μm-125μm 2mm 6
Adhesion test judgment standard: (level 0 is optimal, customer requires minimum level 1)
ISO class 0, ASTM class 5B, the notched edges were completely smooth, without any flaking of the grid edges.
ISO grade 1, ASTM grade 4B, small pieces at the cut intersection are peeled off, and the actual breakage in the scribed area is no more than 5%.
ISO grade 2, ASTM grade 3B, peeling phenomenon at the edge and intersection of the cut, area 5% -15%.
ISO grade 3, ASTM grade 2B, cut edge peel, large piece peel, even partial grid piece peel, peeled area 15% -35%.
ISO grade 4, ASTM grade 1B, cut edge is peeled off in large pieces, part of lattices are peeled off completely, and peeled area is 35% -65%.
ISO grade 5, ASTM grade 0B: more than the last grade.
From the data in table 1, comparative examples 1 to 4 and comparative example 2 show that the transverse longitudinal peeling strength, transverse longitudinal elongation at break and ultimate drawing depth capability of the product prepared by the method are all worse than those of the product prepared by example 2, so that the optimization of the formulas of the inner layer and the outer layer and the formula optimization of the black adhesive in the content of the invention are greatly helpful for the peeling strength, the elongation at break and the ultimate drawing depth capability of the product; from the data in table 2, comparative examples 5 and 6 and comparative example 2 show that the ISO grades of the products obtained therefrom, which are measured under high temperature and high humidity, and the ISO grades measured under corrosion of the electrolyte, are inferior to those of the product obtained in example 2; therefore, in the content of the invention, the ultraviolet passivation treatment and the related coating component proportion are greatly helpful to the ISO grade detected under high temperature and high humidity and the ISO grade detected under electrolyte corrosion. Therefore, the 2 tables prove that the stretching and drawing-in performances of the product are improved by optimizing the formula of the cast polypropylene film layer in the technical scheme, so that the problem that the stretching and drawing-in performances of the traditional black aluminum plastic film are reduced due to the addition of carbon powder and a dispersing agent in the black adhesive layer is solved. The black aluminum-plastic film manufactured by using the ultraviolet passivation method can effectively solve the corrosion phenomenon of the frosted coating of the aluminum-plastic film when contacting electrolyte or other organic solvent liquids, and simultaneously improves the peeling phenomenon of the outer frosted coating under the conditions of high temperature and high humidity.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims (10)

1. A preparation method of a black aluminum-plastic film with high drawing depth and high corrosion resistance is characterized by comprising the following steps:
(1) Deoiling of the aluminum foil layer: selecting a cold-rolled technical aluminum foil with the thickness of 25-65 mu m, removing oil by using an alkaline oil remover, and drying to obtain a clean aluminum foil;
(2) And (3) performing anticorrosive treatment operation on the aluminum foil layer: coating an anti-corrosion treatment agent on the bright surface and the matte surface of the clean aluminum foil by using a coating production line to form an anti-corrosion aluminum foil layer, wherein the thickness of the anti-corrosion aluminum foil layer is 200nm-1 mu m, drying the anti-corrosion aluminum foil layer by using an oven, and then rolling the anti-corrosion aluminum foil layer for later use;
(3) And (3) double-layer co-extrusion polypropylene casting film layer spraying and laminating operation: sending the anticorrosion aluminum foil layer to a spraying mechanism, extruding a heat-sealing material by using a screw extruder of the spraying mechanism, extruding the material from a die head of the screw extruder, then spraying a film to the bright smooth surface, and cooling to form an aluminum foil layer-heat-sealing layer composite semi-finished product;
(4) Melting and pressing operation: heating, melting and pressing the aluminum foil layer-heat sealing layer composite semi-finished product for the second time, cooling and rolling for later use;
(5) Sending the aluminum foil layer-heat sealing layer composite semi-finished product and the nylon outer protective layer from the unwinding mechanism to a coating composite mechanism, compounding the nylon outer protective layer and the aluminum foil layer-heat sealing layer composite semi-finished product through a black adhesive, and heating and reacting through an oven to obtain a black aluminum plastic film semi-finished product;
(6) And sending the black aluminum-plastic film semi-finished product to a micro-concave coating mechanism from an unreeling mechanism, uniformly coating the anti-corrosion frosted coating on the nylon outer protective layer, carrying out passivation treatment by an ultraviolet passivation treatment mechanism after heating reaction in an oven, checking the treatment effect by a color difference meter, and rolling to obtain the high-punching-depth and high-corrosion-resistance black aluminum-plastic film.
2. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: the alkaline degreasing agent in the step (1) comprises a metal surfactant, a builder and water, wherein the metal surfactant is any one of nonylphenol polyoxyethylene ether, polyoxyethylene octylphenol ether and triethanolamine oleate soap, the builder is sodium tripolyphosphate, the mass percentage of the metal surfactant in the degreasing agent is 16% -22%, and the mass percentage of the builder in the degreasing agent is 8% -15%.
3. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: in the step (2), the preservative treatment agent is trivalent chromium or trivalent cesium, the production running speed of the coating production line is 50-120 m/min, the heating temperature of the oven is 80-280 ℃, and the heating time is 2-4 seconds.
4. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: the production running speed of the spraying and repeating operation of the polypropylene heat-sealing layer in the step (3) is 50-80 m/min.
5. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: the heat-seal material in the step (3) comprises an outer layer raw material and an inner layer raw material, the screw extruder is double-layer co-extrusion equipment, the double-layer co-extrusion equipment comprises a No. 1 extruder and a No. 2 extruder, polypropylene raw material particles, a POE elastomer and non-migrating modified erucamide are added into the No. 1 extruder, and the outer layer raw material is obtained by mixing; adding maleic anhydride grafted polypropylene particles, a modified PP elastomer and non-migrating modified erucamide particles into the No. 2 extruder, and mixing to obtain the inner layer raw material, wherein the processing temperature of the No. 1 extruder is 260 ℃, the internal pressure of the No. 1 extruder is 75bar, the processing temperature of the No. 2 extruder is 270 ℃, the internal pressure of the No. 2 extruder is 90bar, a No. 1 filtering device is arranged between the No. 1 extruder and the No. 1 membrane head, a No. 2 filtering device is arranged between the No. 2 extruder and the No. 2 membrane head, the number of the filtering screens of the No. 1 filtering device and the number 2 filtering device are 3-5 layers, the mesh number of each layer of the filtering screen is 50-500 meshes/square inch, and the heating temperature of the No. 1 die head and the number 2 die head is 275; the cooling uses a first cooling roller, the cooling temperature of the first cooling roller is 10-60 ℃, the diameter of the first cooling roller is 1000mm, the pressure of a compression roller is 0.3Mpa, and the total thickness of the double-layer co-extrusion polypropylene casting film layer is 45 mu m.
6. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 5, wherein the method comprises the following steps: the mass percentages of the polypropylene raw material particles, the POE elastomer and the non-migrating modified erucic acid acyl particles are 85%, 10% and 5% respectively, the grafting ratio of the maleic anhydride grafted polypropylene particles is 3%, the mass percentages of the maleic anhydride grafted polypropylene particles, the modified PP elastomer and the non-migrating modified erucic acid amide particles are 70%, 25% and 5% respectively, and the thickness ratio of the outer layer to the inner layer is 1:1.
7. the method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: in the step (4), the secondary heating needs a first heating roller, a second heating roller and a third heating roller, the heating temperature of the first heating roller is 90 ℃, the heating temperature of the second heating roller is 170 ℃, the heating temperature of the third heating roller is 185 ℃, the diameters of the first heating roller, the second heating roller and the third heating roller are all 600mm, the second cooling roller is used for cooling, the cooling temperature of the second cooling roller is 28-35 ℃, the diameter of the second cooling roller is 600mm, and the pressing pressure is 0.15-0.25 Mpa.
8. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: in the step (5), the black adhesive takes polyisocyanate as a main agent and polyester polyols as a curing agent, black carbon powder and a dispersant mainly comprising polyacrylamide are added, and the solvent is ethyl acetate, wherein the corresponding mass percentages of the ethyl acetate, the polyisocyanate, the polyester polyols, the dispersant mainly comprising polyacrylamide and the black carbon powder are 45:40:10:4.5:0.5, the heating temperature is 50-80 ℃, the heating time is 2-3 seconds, the production speed of the step (5) is 20-60 m/min, and the composite pressure is 0.15-0.25 Mpa.
9. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: the anti-corrosion frosted coating in the step (6) comprises 60% of a solvent, 35% of ultraviolet curing resin, 1% of a dispersing agent, 1% of a slipping auxiliary agent, 1% of frosted particles and 2% of an ultraviolet passivation treating agent.
10. The method for preparing the black aluminum-plastic film with high drawing depth and high corrosion resistance as claimed in claim 1, wherein the method comprises the following steps: in the step (6), the diameter of the micro-concave coating roller of the micro-concave coating mechanism is 50mm, the mesh number is 200 meshes, the mesh depth is 1-3 mu m, a heating area of the oven is sequentially divided into 1 area, 2 area and 3 area, the corresponding temperature of the 1 area, 2 area and 3 area is 200 ℃, 220 ℃ and 240 ℃, and the wavelength of the ultraviolet passivation treatment mechanism is 254-400nm.
CN202211252107.6A 2022-10-13 2022-10-13 Preparation method of black aluminum-plastic film with high punching depth and high corrosion resistance Pending CN115556393A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116604849A (en) * 2023-07-17 2023-08-18 江阴苏达汇诚复合材料有限公司 Production process of aluminum-plastic film for lithium ion battery

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116604849A (en) * 2023-07-17 2023-08-18 江阴苏达汇诚复合材料有限公司 Production process of aluminum-plastic film for lithium ion battery
CN116604849B (en) * 2023-07-17 2023-09-29 江阴苏达汇诚复合材料有限公司 Production process of aluminum-plastic film for lithium ion battery

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