High-purity aluminum foil as well as preparation method and application thereof

An aluminum foil and high-speed technology, applied in the field of high-speed aluminum foil and its preparation, can solve the problems of unable to meet the requirements of mass production, incomplete removal of oil spots, leakage of coating on the surface of aluminum foil, etc., to improve the adhesion and oil removal effect. , the effect of no attenuation change

Active Publication Date: 2022-07-29
HANGZHOU FIVE STAR ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in this process: first, the speed is slow and cannot meet the requirements of mass production; second, there are many roller systems passing through, which is easy to cause pitting (concave-convex points), and the probability of unqualified appearance increases; third, after passing There are many roller systems, easy to wrinkle
The alignment and registration of the front and back patterns can be completed, but the oil spots on the surface have not been completely removed, and the surface of the coated aluminum foil still has different degrees of missing coating

Method used

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  • High-purity aluminum foil as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A preparation method of high-grade aluminum foil, comprising the following steps:

[0040] (1) Rough rolling, intermediate rolling, and finishing rolling were performed on the aluminum foil material to obtain 0.015 mm aluminum foil. The mass percentage of each element of the aluminum foil material is Fe 0.25%, Si 0.05%, Cu 0.04%, Ti 0.02%, Mn 0.08%, Mg 0.03%, Ti 0.031%, and the balance is Al. The oil index of intermediate rolling and finishing rolling can ensure the initial wetting tension of the obtained aluminum foil, and its main indexes are shown in Table 1:

[0041] Various indicators Medium rolling Finishing Viscosity target value (mm 2 / s)

1.7-2.05 1.8-2.1 Transmittance(%) ≥80 ≥90 Gum (g / L) ≤20 ≤10 Alcohol content (%) 1.0-2.0 3.0-5.0 Ester content (%) 5.0-7.0 10.0-12.0

[0042] The roll standards for intermediate rolling and finishing rolling are shown in Table 2:

[0043] Table 2

[0044] Vario...

Embodiment 2

[0050] A preparation method of high-grade aluminum foil, comprising the following steps:

[0051] The difference between Example 2 and Example 1 is that in step (3), after the aluminum foil is dimpled and dried, the cleaning solution in the trough is removed, and after the water-based carbon-coated slurry is stirred and dispersed evenly, the micro-coated slurry is supplied through a feeding pump. In the trough of the gravure roll, the front and back sides of the aluminum foil are then coated and dried.

[0052] The rest was the same as that of Example 1, and a carbon-coated aluminum foil was obtained.

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Abstract

According to the preparation method, the step that cleaning liquid is placed in a material groove of a micro-concave roller to conduct micro-concave cleaning on the aluminum foil is added, the dyne value of the aluminum foil is greatly increased, the dyne value is increased to 60 dyn from original 30 dyn, and the technical blank of the high-grade aluminum foil is filled up; and the micro-concave roller is used for cleaning, so that the production rate is greatly improved. According to the method, the amount of the used cleaning liquid is small, and the amount of the cleaning liquid is accurately controlled by adjusting the mesh number of the micro-concave roller. The method is obvious in deoiling effect, does not generate harmful gas in the use process, and has the characteristics of environmental protection and no pollution. By adopting the method disclosed by the invention, the binding power of the aluminum foil can be remarkably improved, no side effect is caused to the mechanical property of the aluminum foil, the dyne value of the obtained aluminum foil is kept stable, and the attenuation change is basically avoided in the production process. And the application of the obtained aluminum foil in the lithium ion battery is further ensured.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil processing, and relates to a Gundam aluminum foil and a preparation method and application thereof. Background technique [0002] Due to the rapid development of new energy vehicles in the world, the demand for lithium batteries is increasing, and the demand for battery aluminum foil is also rapidly driven. According to the data, my country's aluminum foil output showed a steady growth trend from 2016 to 2020, and the growth rate was generally 4%-5%. In 2020, my country's aluminum foil production was 4.15 million tons, a year-on-year increase of 3.75%. According to the China Nonferrous Metals Processing Industry Association's disclosure at the China Aluminum Foil Industry Development Summit Forum, China's current aluminum foil production output accounts for almost 60%-65% of the global aluminum foil industry. [0003] The carbon-coated aluminum foil in the aluminum foil can effectively red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B45/02B21B1/40B21B15/00B21B3/00
CPCB21B45/0275B21B1/40B21B15/0007B21B3/00B21B2015/0057B21B2003/001Y02E60/10
Inventor 祝雅磊曾杰江邢行艾俊
Owner HANGZHOU FIVE STAR ALUMINUM
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