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Passivation solution suitable for processing aluminum foil of aluminum-plastic film

A technology of aluminum-plastic film and passivation solution, which is applied in the coating process of metal materials, can solve problems such as environmental pollution, harm to human health, and weak bonding force, and achieve simple processing technology, high lamination strength, and material economic effect

Inactive Publication Date: 2018-11-06
惠州市广麟材耀科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, boehmite treatment can increase the bonding force between the aluminum foil and the heat-sealing layer, but the corrosion resistance and electrolyte resistance are not good. Zirconium-titanium conversion coating treatment and rare earth metal salt treatment can increase the bonding force between the aluminum foil and the heat-sealing layer. Bonding force and corrosion resistance of aluminum foil, but the effect of electrolyte resistance is not very ideal
Chromate treatment can increase the bonding force between the aluminum foil and the heat-sealing layer, and has good corrosion resistance, but it contains strong carcinogenic hexavalent chromium metal salt, which not only pollutes the environment, but also endangers human health. Valence chromium passivation treatment alternative
The trivalent chromium passivation treatment reported at home and abroad is a treatment method with trivalent chromium compounds as the main component, which does not contain organic matter, and the conversion film formed on the surface after treatment does not contain polar groups such as carboxyl groups and hydroxyl groups. The bonding force between the layers is not very strong, and the electrolyte resistance is not good

Method used

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  • Passivation solution suitable for processing aluminum foil of aluminum-plastic film
  • Passivation solution suitable for processing aluminum foil of aluminum-plastic film
  • Passivation solution suitable for processing aluminum foil of aluminum-plastic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Composition of passivation solution:

[0039]

[0040] After the passivation solution is prepared, 9 g of ethanol is added to it, and the mixture is evenly mixed for later use.

[0041] Take the degreased 8021 aluminum foil (thickness 40um), apply the mixed solution on the bright surface of the aluminum foil with a 6um wire rod, the baking temperature is 160 degrees, and the baking time is 2min. Then, the treated aluminum foil was laminated with CPP (40um) with modified polyolefin-based glue and cured by dry lamination method, and then the peeling force, water resistance and electrolyte resistance were measured. Salt spray resistance of aluminum foil.

Embodiment 2

[0043] Composition of passivation solution:

[0044]

[0045]

[0046] After the passivation solution is prepared, 9 g of ethanol is added to it, and the mixture is evenly mixed for later use.

[0047] Take the degreased 8021 aluminum foil (thickness 40um), use a 6um wire rod to coat the mixture on the bright surface of the aluminum foil, the baking temperature is 180 degrees, and the baking time is 1 min. Then, the treated aluminum foil was laminated with CPP (40um) with modified polyolefin-based glue and cured by dry lamination method, and its peel force, water resistance and electrolyte resistance were measured. The salt spray resistance of aluminum foil.

Embodiment 3

[0049] Composition of passivation solution:

[0050]

[0051] After the passivation solution is prepared, 9 g of ethanol is added to it, and the mixture is evenly mixed for later use.

[0052] Take the degreased 8021 aluminum foil (thickness 40um), apply the mixed solution on the bright surface of the aluminum foil with a 6um wire rod, the baking temperature is 200 degrees, and the baking time is 40s. Then, the treated aluminum foil was laminated with CPP (40um) with modified polyolefin-based glue and cured by dry lamination method, and its peel force, water resistance and electrolyte resistance were measured. The salt spray resistance of aluminum foil.

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PUM

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Abstract

The invention relates to a passivation solution suitable for processing the aluminum foil of an aluminum-plastic film. The passivation solution comprises, by weight, 100 parts of distilled water, 0.1-5.0 parts of phosphoric acid or phosphate compound, 0.2-8.0 parts of trivalent chromium compound, 0.01-2.0 parts of zirconium compound, 0.01-8.0 parts of fluoride, 0.1-30 parts of acrylic resin, 0.01-6.0 parts of crosslinking agent, 0-1.0 part of auxiliary and a certain amount of pH regulator. 8021 aluminum foil processed by the passivation solution has excellent corrosion resistance, and the processed aluminum foil combined with CPP through modified polyolefin-based glue has excellent binding force, electrolyte resistance and water resistance.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil surface treatment, and in particular relates to a treatment liquid suitable for passivating the surface of aluminum foil of aluminum-plastic film and its application. Background technique [0002] In recent years, as a lithium battery used in computers, mobile phones, cameras, electric vehicles, etc., in order to achieve its ultra-thin and miniaturized, a large number of related research and reports have been carried out at home and abroad. Aluminum-plastic film is used as the packaging material for lithium batteries, and the long-term effectiveness of its packaging electrolyte is an important factor in determining the performance of lithium batteries. Since the electrolyte solution used in lithium batteries contains propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate and other substances with strong permeability and strong polarity, when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/36
CPCC23C22/36
Inventor 刘德龙王志成
Owner 惠州市广麟材耀科技有限公司
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