CN113634607A - Aluminum foil rolling mill rolling oil and application thereof in preparation of aluminum foil - Google Patents
Aluminum foil rolling mill rolling oil and application thereof in preparation of aluminum foil Download PDFInfo
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- CN113634607A CN113634607A CN202110749581.9A CN202110749581A CN113634607A CN 113634607 A CN113634607 A CN 113634607A CN 202110749581 A CN202110749581 A CN 202110749581A CN 113634607 A CN113634607 A CN 113634607A
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- aluminum foil
- rolling
- oil
- contact angle
- rolling oil
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 200
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 195
- 239000011888 foil Substances 0.000 title claims abstract description 195
- 238000005096 rolling process Methods 0.000 title claims abstract description 86
- 239000010731 rolling oil Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 150000002148 esters Chemical class 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 7
- 230000009467 reduction Effects 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000003490 calendering Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 abstract description 31
- 230000000694 effects Effects 0.000 abstract description 16
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052744 lithium Inorganic materials 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 8
- 238000003851 corona treatment Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 38
- 230000000052 comparative effect Effects 0.000 description 12
- 239000011859 microparticle Substances 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000002199 base oil Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- -1 inorganic acid ester Chemical class 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 150000007522 mineralic acids Chemical class 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- DLKQHBOKULLWDQ-UHFFFAOYSA-N 1-bromonaphthalene Chemical compound C1=CC=C2C(Br)=CC=CC2=C1 DLKQHBOKULLWDQ-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0239—Lubricating
- B21B45/0242—Lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M171/00—Lubricating compositions characterised by purely physical criteria, e.g. containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
- B21B2003/001—Aluminium or its alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/02—Hydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/24—Metal working without essential removal of material, e.g. forming, gorging, drawing, pressing, stamping, rolling or extruding; Punching metal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/20—Metal working
- C10N2040/244—Metal working of specific metals
- C10N2040/245—Soft metals, e.g. aluminum
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses rolling oil for an aluminum foil rolling mill and application of the rolling oil in preparation of aluminum foils, and relates to the technical field of metal material processing methods. The rolling oil for the aluminum foil rolling mill comprises 5.5-6.5 wt% of ester, less than or equal to 1 wt% of alcohol and less than or equal to 0.25mg KOH/g of acid value. The aluminum foil rolling machine has the advantages that the content of ester in rolling oil of the aluminum foil rolling machine is improved, the content of alcohol is reduced, the surface contact angle of an aluminum foil is reduced, the aluminum foil does not undergo corona treatment, the process parameters in the aluminum foil rolling process are adjusted, the thickness of an oil film layer on the surface of an aluminum foil product is reduced, the surface contact angle of the aluminum foil is further reduced, the lowest surface contact angle can reach 28 degrees, the effect of improving the binding force of the aluminum foil and other substances is achieved, the application field of lithium battery materials is optimized, long-time storage requirements can be met, the increase of the aluminum foil contact angle cannot be caused, and the storage time is more than 6 months.
Description
Technical Field
The invention relates to the technical field of metal material processing methods, in particular to rolling oil for an aluminum foil rolling mill and application of the rolling oil in preparation of aluminum foils.
Background
The invention of CN104611616A discloses a preparation method of an aluminum foil for a power functional material produced by utilizing a cast-rolled blank, in the preparation method, in the secondary cold rolling process, the mass percentage of alcohol in the rolling oil for lubrication is 4.0-6.0%, the mass percentage of ester is 0.8-2.05%, and the acid value is 0.2-0.3, so that the lubrication effect of secondary cold rolling semi-finished product processing pass rolling is ensured, the surface pollution effect of an aluminum plate is reduced, and the surface quality cleanness pollution of the aluminum plate is less than 2 grade; in the foil rolling process, the mass percentage of alcohol in the rolling oil for lubrication is 1.5-3.6%, the mass percentage of ester is 2.6-5.4%, and the acid value is 0.12-0.25, so that the lubricating effect of the foil rolled product in the processing pass rolling is ensured, the surface pollution effect is low, and the surface quality cleanness pollution of the aluminum plate is less than 2 grades.
Although the invention also relates to the control of ester content, alcohol content and acid value in the rolling oil, which is used for improving the lubricating effect of aluminum foil rolling and reducing the surface pollution of an aluminum plate, the rolling oil of the invention cannot solve the problem of large contact angle of the surface of the aluminum foil.
Due to the particularity of the manufacturing process of the aluminum foil, the modern aluminum foil is usually produced by rolling, the rolling of the aluminum foil is usually carried out by adopting a foil rolling mill, in the rolling process of the aluminum foil, a working roll of the foil rolling mill is in contact with the aluminum foil, and the aluminum foil is thinned to the target thickness according to different rolling passes. In order to obtain sufficient lubricating effect to ensure smooth aluminum foil rolling, rolling oil is indispensable in the aluminum foil rolling process. The surface of the aluminum foil after being rolled is remained with an oil film, the surface tension of the traditional oil film is low, which indirectly leads to the increase of the surface contact angle of the aluminum foil, so that the surface contact angle of the aluminum foil after being rolled by the aluminum foil is more than or equal to 38 degrees, which leads to the reduction of the bonding force between an aluminum foil product and other substances, and the aluminum foil is limited in the field of directly coating the material on the surface of the aluminum foil for use. For example, in the coating process of the aluminum foil of the current collector for the lithium battery, the oil film on the surface of the aluminum foil can cause the bonding force between the aluminum foil and the positive electrode material of the lithium battery to be reduced, the failure of the coating process or the non-uniformity of the partially coated material can be caused, and the energy density of the lithium battery product can be greatly reduced.
In order to reduce the contact angle of the surface of the aluminum foil to improve the binding force between the cathode material and the aluminum foil and achieve the effect of increasing the energy density of the lithium battery product, the common practice in the lithium battery industry is to perform pre-carbon coating treatment on the surface of the aluminum foil, or perform pre-carbon coating treatment on the surface of the aluminum foil by an aluminum foil manufacturer. The processing mode increases the production cost of the lithium battery and reduces the production efficiency.
Some aluminum foil manufacturers perform corona treatment on the surface of the aluminum foil, so that the oil film content on the surface of the aluminum foil is reduced, the effect of improving the surface tension of the aluminum foil is achieved, and the contact angle of the surface of the aluminum foil is reduced. However, the corona treatment can only produce effect in a short period of time, and the surface contact angle of the aluminum foil is further increased after more than 3 months, so that the using effect of a client cannot be achieved, and a large amount of waste products are produced.
Disclosure of Invention
The invention aims to solve the technical problems that the surface contact angle of an aluminum foil is large and the bonding force between an aluminum foil product and other substances is low due to the fact that an oil film is remained on the surface of the aluminum foil after the aluminum foil is rolled in the prior art, and provides the rolling oil for the aluminum foil rolling mill.
The invention also aims to provide application of the rolling oil of the aluminum foil rolling mill in the process of rolling the aluminum foil.
Still another object of the present invention is to provide a method for manufacturing an aluminum foil.
It is yet another object of the present invention to provide an aluminum foil product.
The above purpose of the invention is realized by the following technical scheme:
the rolling oil for the aluminum foil rolling mill comprises 5.5-6.5 mass percent of ester, less than or equal to 1 mass percent of alcohol and less than or equal to 0.25mg KOH/g of acid value.
In the production of the aluminum foil industry, generally, 3-5% by mass of ester, 3-6% by mass of alcohol and 0.3-1.0 mg KOH/g of acid are used as rolling oil to increase the oil film strength, but a large amount of inorganic acid is added to the rolling oil of an aluminum foil rolling mill along with the increase of the rolling time, the alcohol in the rolling oil of the aluminum foil rolling mill and the inorganic acid generate esterification reaction to generate inorganic acid ester, and the inorganic acid ester in the rolling oil of the aluminum foil rolling mill can destroy the stability of an oil film in the rolling process to cause the oil film to break, so that the friction force between the aluminum foil and a working roller is increased, and aluminum powder microparticles and iron powder microparticles are increased, thereby increasing the thickness of the oil film layer, further increasing the surface contact angle of the aluminum foil, and finally reducing the bonding force between the aluminum foil and other substances.
The invention improves the ester content in the rolling oil of the aluminum foil rolling mill to 5.5-6.5%, reduces the alcohol content to be less than or equal to 1%, controls the acid value to be less than or equal to 0.25mg KOH/g, has better lubricating effect than the alcohol, can reduce the friction coefficient of aluminum foil rolling in the aluminum foil rolling process, greatly reduces the generation of aluminum powder microparticles and iron powder microparticles, meanwhile, the reduction of the alcohol content and the acid value inhibits or reduces the esterification reaction between alcohol and inorganic acid in the rolling oil of the aluminum foil rolling mill, reduces the generation of inorganic acid ester, plays a role in improving the oil film strength of oil products, improves the oil film stability in the rolling process, greatly reduces the occurrence of the situation that the oil film is broken, is beneficial to ensuring the smooth rolling of the aluminum foil, reduces the thickness of the oil film layer, and further reduces the surface contact angle of the aluminum foil, thereby improving the surface quality of the aluminum foil product and finally improving the binding force of the aluminum foil and other substances.
Preferably, the mass percentage of the alcohol in the rolling oil is 0.1-1%, and the acid value is 0.03-0.25 mg KOH/g.
Preferably, the mass percent of the ester in the rolling oil is 5.8-6.3%, the mass percent of the alcohol is 0.1-0.7%, and the acid value is 0.03-0.17 mg KOH/g.
Preferably, the mass percent of the ester in the rolling oil is 6.1-6.3%, the mass percent of the alcohol is 0.1-0.3%, and the acid value is 0.03-0.09 mg KOH/g.
Preferably, the flash point of the base oil in the rolling oil of the aluminum foil rolling mill is 81-85 ℃.
The base oil used in the present invention is exemplified by the selected type MOA-80, and the selection of the base oil is not limited. The flash point of the base oil in the rolling oil of the aluminum foil rolling mill is selected within the range of 81-85 ℃, so that the viscosity of the rolling oil of the aluminum foil rolling mill is favorably reduced, the reduction of the viscosity is favorable for reducing the friction force between an aluminum foil and a working roller, the increase of aluminum powder microparticles and iron powder microparticles is reduced to reduce the thickness of an oil film layer, the surface contact angle of the aluminum foil is further reduced, and the effect of improving the binding force between the aluminum foil and other substances is achieved.
The invention provides application of the rolling oil of the aluminum foil rolling mill in a calendering rolling process of an aluminum foil.
The aluminum foil material of the present invention is 1235, 1060, 1070, 8011, 8021, and 8079 aluminum alloy in the national standard.
The invention also specifically protects a preparation method of the aluminum foil, which adopts rolling oil of an aluminum foil rolling mill to carry out calendaring rolling.
Wherein, the aluminum foil calendering and rolling process comprises the following steps:
1. smelting primary aluminum into aluminum liquid;
2. rolling the molten aluminum smelted in the step 1 into a plate blank;
3. reducing and rolling the plate blank rolled in the step 2 again to form aluminum foil blanks;
4. and finally, rolling the aluminum foil rough material into an aluminum foil product with the target thickness.
In the process of rolling the aluminum foil rough material into an aluminum foil product with target thickness, working rolls of a foil rolling mill and aluminum foil rolling mill rolling oil for lubrication are in contact with the aluminum foil, and the aluminum foil is thinned to the target thickness according to the deformation capacity and different rolling passes of different aluminum alloy foils. Through the aluminum foil calendering and rolling process, the final thickness of the aluminum foil product prepared by the method is within the range of 0.008-0.03 mm.
Preferably, the rolling reduction of the final finished product of the aluminum foil is 25 to 38 percent during the pass rolling.
The reduction amount is the difference between the thickness of the aluminum foil before rolling and the thickness after rolling. The rolling reduction of the final finished product of the aluminum foil is controlled to be 25-38%, so that the brightness and the flatness of the surface of the aluminum foil product are improved, and the effect of reducing the surface contact angle of the aluminum foil product is achieved. When the reduction is reduced, the contact angle of the surface of the aluminum foil is increased.
Preferably, the rolling reduction of the final finished product of the aluminum foil is 30-35% during the pass rolling.
Preferably, the coiling tension of the final finished product pass of the aluminum foil is 36-55N/mm2。
The lubricating effect of the ester is superior to that of alcohol, the ester can reduce the friction coefficient of aluminum foil rolling in the aluminum foil rolling process, the generation of aluminum powder microparticles and iron powder microparticles is greatly reduced, but the rolling force (the force applied by a working roller to the aluminum foil) is obviously reduced by increasing the mass percentage of the ester to 5.5-6.5%, and the plate shape of the aluminum foil is further influenced, for example, the flatness of the aluminum foil is influenced. The coiling tension of the final finished product pass of the aluminum foil is reduced by 36-55N/mm2The forward slip is reduced, the rolling force in the aluminum foil rolling process can be improved, the adverse effect of the reduction of the rolling force caused by the increase of the ester content is eliminated or weakened, and the effect of the percentage increase of the ester mass on the aluminum foil shape is reduced.
Preferably, the coiling tension of the final finished product pass of the aluminum foil is 40-48N/mm2。
The invention provides an aluminum foil product prepared by the preparation method of the aluminum foil.
Preferably, the thickness of the oil film layer on the surface of the aluminum foil product is less than or equal to 150 nm.
The thickness of the oil film layer on the surface of the aluminum foil product is reduced to be less than or equal to 150nm, so that the quantity of aluminum powder particles and iron powder particles in the oil film layer is reduced, and the contact angle of the surface of the aluminum foil is reduced.
Preferably, the thickness of the oil film layer on the surface of the aluminum foil product is 50-100 nm.
Compared with the prior art, the invention has at least one of the following beneficial technical effects:
1. according to the invention, the ester content in the rolling oil of the aluminum foil rolling mill is increased to 5.5-6.5%, the alcohol content is reduced to be less than or equal to 1%, and the acid value is controlled to be less than or equal to 0.25mg KOH/g, so that the alcohol and inorganic acid esterification reaction in the rolling oil of the aluminum foil rolling mill is inhibited or reduced, the generation of inorganic acid ester is reduced, the oil film strength of an oil product is improved, the stability of the oil film in the rolling process is improved, the occurrence of the situation that the oil film is broken is greatly reduced, the smooth operation of aluminum foil rolling is favorably ensured, the thickness of the oil film layer is reduced, the surface contact angle of the aluminum foil is further reduced, and the surface contact angle is reduced to be below 35 degrees, so that the surface quality of the aluminum foil product is improved, and the binding force between the aluminum foil and other substances is finally improved.
2. According to the preparation method of the aluminum foil, under the condition that the aluminum foil is not subjected to corona treatment, the thickness of an oil film layer on the surface of an aluminum foil product is reduced by adjusting the rolling reduction of the final finished product pass of the aluminum foil and the coiling tension of the final finished product pass of the aluminum foil, so that the surface contact angle of the aluminum foil is reduced to 28 degrees at the lowest, the effect of improving the binding force of the aluminum foil and other substances is achieved, the optimal use effect is achieved for the application field of lithium battery materials, the long-time storage requirement can be met, the increase of the aluminum foil contact angle cannot be caused, and the storage time can be more than 6 months.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.
The size of the contact angle is measured by using a contact angle detector, and the size of the contact angle is measured by uniformly using a 1-bromonaphthalene solution, in this embodiment, the contact angle detector is exemplified by selecting a baiohlin brand and a model THETA LITE, and the selection of the contact angle detector is not limited. The method specifically comprises the following steps:
(1) preparing a 1-bromonaphthalene test solution, and cutting a sample to be tested into a size of 50 x 100 mm;
(2) placing a sample to be detected on a test board of a contact angle detection instrument, and dripping 10 mu L of liquid at one time;
(3) photographs were taken by a contact angle detector and the contact angles were automatically calculated.
The oil film thickness measuring method specifically comprises the following steps:
(1) the sampling area of the aluminum foil product is 100mm2As a sample to be tested;
(2) weighing the sample to be measured within 30s by using an electronic balance to obtain G1;
(3) quickly putting the weighed aluminum foil product into a drying furnace for drying, wherein the drying time is 20min, and the drying temperature is 80-100 ℃;
(4) weighing the dried aluminum foil product again by using an electronic balance to obtain G2;
(5) thickness of oil film (G1-G2)/(100 mm)2Rolling oil density), rolling oil density was 0.792 g/mL.
Example 1
The rolling oil for the aluminum foil rolling mill comprises 6.3 mass percent of ester, 0.1 mass percent of alcohol and 0.03mg KOH/g of acid value, wherein the flash point of base oil in the rolling oil is 80 ℃.
The aluminum foil is rolled by 33% in a final product pass (the final product pass refers to a production pass in which the aluminum foil is rolled from a certain thickness to the target thickness of the final aluminum foil by a foil rolling mill).
The coiling tension of the final finished product pass of the aluminum foil is 46N/mm2。
The aluminum foil is 8011 in the national standard.
The thickness of the oil film layer on the surface of the finally obtained aluminum foil product is 60 nm.
The contact angle of the surface of the aluminum foil prepared in the example is 28 degrees.
Examples 2 to 20
Examples 2 to 20 are different from example 1 in the content by mass of ester, the content by mass of alcohol, and the acid value in the rolling oil. See table 1 for specific values. wt.% represents the mass percentage content.
TABLE 1 summary of rolling oil parameters, oil film layer thickness and aluminum foil surface contact angle in examples 1-20
| Esters (wt.%) | Alcohol (wt.%) | Acid value (mgKOH/g) | Surface contact Angle (°) | |
| Example 1 | 6.3 | 0.1 | 0.03 | 28 |
| Example 2 | 5.6 | 0.8 | 0.23 | 32 |
| Example 3 | 6.4 | 0.2 | 0.09 | 29 |
| Example 4 | 5.5 | 0.1 | 0.05 | 29 |
| Example 5 | 6.5 | 0.7 | 0.17 | 31 |
| Example 6 | 6.0 | 0.0 | 0.06 | 30 |
| Example 7 | 5.8 | 0.6 | 0.11 | 30 |
| Example 8 | 6.3 | 0.1 | 0.03 | 35 |
| Example 9 | 6.5 | 0.1 | 0.03 | 31 |
| Example 10 | 5.8 | 0.1 | 0.03 | 29 |
| Example 11 | 5.5 | 0.1 | 0.03 | 32 |
| Example 12 | 6.3 | 0.7 | 0.03 | 30 |
| Example 13 | 6.3 | 1 | 0.03 | 31 |
| Example 14 | 6.3 | 0.3 | 0.03 | 29 |
| Example 15 | 6.3 | 0.1 | 0.17 | 30 |
| Example 16 | 6.3 | 0.1 | 0.25 | 31 |
| Example 17 | 6.3 | 0.1 | 0.09 | 33 |
Examples 18 to 30
Examples 18 to 30 are different from example 1 in that the rolling reduction of the final pass of the aluminum foil and the winding tension of the final pass of the aluminum foil are different. See table 2 for specific values.
Table 2 summary of the aluminum foil calendering process conditions and the aluminum foil surface contact angles in examples 18 to 30
Example 31
The preparation method of the aluminum foil uses aluminum foil rolling mill rolling oil in the aluminum foil rolling process, and the aluminum foil rolling mill rolling oil is the same as that in the embodiment 1, and the difference is that a rolling process before optimization is adopted:
the specific process comprises the following steps: the rolling reduction of the aluminum foil in the final finished product pass rolling is 28 percent;
the coiling tension of the final finished product pass of the aluminum foil is 65N/mm2；
The aluminum foil is 8011 in the national standard.
The thickness of the oil film layer on the surface of the finally obtained aluminum foil product is 200 nm.
The contact angle of the surface of the aluminum foil prepared in this example was 35 °.
Comparative examples 1 to 7
Comparative examples 1 to 7 differ from example 1 in the mass percentage of ester, mass percentage of alcohol and acid number in the rolling oil. See table 3 for specific values.
TABLE 3 summary of rolling oil parameters in comparative examples 1-7
It can be seen from the combination of comparative examples 1-2 and table 3 that the surface contact angle of the aluminum foil is as high as 38 ° due to the lower mass percentage of the ester in the rolling oil of comparative example 1, and conversely, the surface contact angle of the aluminum foil is increased to 40 ° as the mass percentage of the ester in the rolling oil is increased. In the comparative examples 3 to 4 and table 3, it is understood that the surface contact angle of the aluminum foil is increased gradually as the mass percentage of the alcohol in the rolling oil is increased. In combination with comparative examples 5-7 and table 3, it can be seen that the surface contact angle of the aluminum foil is as high as 42 ° due to the fact that the mass percentage of the acid value in the rolling oil and the alcohol in the rolling oil in comparative example 6 is relatively high; as can be seen from comparative examples 5 and 7, the surface contact angle of the aluminum foil rather gradually increased as the acid value in the rolling oil increased.
Performance test
1. Measurement of contact Angle duration
The aluminum foil products obtained in examples 1 to 8 and comparative examples 1 to 7 were cut into small rolls after the winding tension was set to 10Mpa or more, respectively, the surface contact angle of the aluminum foil was measured every 1 month at room temperature, and the measurement results were recorded as shown in tables 4 and 5.
TABLE 4 measurement of contact Angle continuity of finished aluminum foils obtained in examples 1 to 8
TABLE 5 measurement of contact Angle continuity of finished aluminum foils obtained in comparative examples 1 to 7
By combining examples 1 to 8, comparative examples 1 to 7, tables 3 and 4, it can be seen that the rolling oil provided by the invention can produce effects in a long time when being applied to a calendering and rolling process of an aluminum foil, the contact angle change of the surface of the aluminum foil is small or even no change, and the rolling oil provided by the invention has good continuity for the reduction of the contact angle of the surface of the aluminum foil.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The rolling oil of the aluminum foil rolling mill is characterized in that: the mass percentage of ester in the rolling oil is 5.5-6.5%, the mass percentage of alcohol is less than or equal to 1%, and the acid value is less than or equal to 0.25mg KOH/g.
2. The aluminum foil mill rolling oil of claim 1, wherein: the mass percentage of alcohol in the rolling oil is 0.1-1%, and the acid value is 0.03-0.25 mg KOH/g.
3. The aluminum foil mill rolling oil of claim 2, characterized in that: the mass percentage of ester in the rolling oil is 5.8-6.3%, the mass percentage of alcohol is 0.1-0.7%, and the acid value is 0.03-0.17 mg KOH/g.
4. Use of the aluminum foil rolling oil of any one of claims 1 to 3 in a process of rolling an aluminum foil.
5. A preparation method of an aluminum foil is characterized by comprising the following steps: the aluminum foil rolling mill rolling oil of any one of claims 1 to 3 is used for calendering and rolling.
6. The method of manufacturing an aluminum foil as set forth in claim 5, wherein: the rolling reduction of the final finished product pass rolling of the aluminum foil is 25-38%.
7. The method of manufacturing an aluminum foil as set forth in claim 6, wherein: the rolling reduction of the final finished product of the aluminum foil is 30-35%.
8. The method of manufacturing an aluminum foil as set forth in claim 5, wherein: the coiling tension of the final finished product pass of the aluminum foil is 36-55N/mm2。
9. The method for manufacturing an aluminum foil as recited in claim 8, wherein: the coiling tension of the final finished product pass of the aluminum foil is 40-48N/mm2。
10. An aluminum foil product produced by the method for producing an aluminum foil according to claim 5.
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| CN115302134A (en) * | 2022-03-17 | 2022-11-08 | 山东迈拓凯尔新材料科技有限公司 | Surface protection composition for aluminum foil for welding |
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| CN115302134A (en) * | 2022-03-17 | 2022-11-08 | 山东迈拓凯尔新材料科技有限公司 | Surface protection composition for aluminum foil for welding |
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