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Formation method for relieving wavy edge of low-voltage formed foil

A chemical formation method and foil formation technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, electrolytic capacitor, etc., can solve the problems of affecting downstream cutting and small effective use area, so as to achieve flat utilization rate, improve product consistency, Reduce the effect of wavy edges

Active Publication Date: 2018-06-19
NANTONG HAIXING ELECTRONICS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The product pattern of this low-pressure forming foil manufacturing method is wavy, which affects downstream cutting, and the effective use area of ​​the product is small

Method used

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  • Formation method for relieving wavy edge of low-voltage formed foil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: Pretreatment: Put the low-pressure corrosion foil into a mixed aqueous solution of 5wt% γ-butyrolactone and 0.2wt% maleic acid at a temperature of 40°C for 5 minutes; put the pretreated aluminum foil in 7wt% hexanoic acid Ammonium diacid and 0.05wt% maleic acid solution, temperature 70°C, current density 20mA / cm 2 , the voltage is 5v, and anodized for 5 minutes to obtain a primary formed foil; the primary formed foil is placed in a solution of 7wt% ammonium adipate and 0.05wt% maleic acid at a temperature of 70°C and a current density of 20mA / cm 2 , the voltage is 10v, and anodized for 5min to obtain a secondary formed foil; the secondary formed foil is placed in a solution of 7wt% ammonium adipate and 0.05wt% maleic acid at a temperature of 70°C and a current density of 20mA / cm 2 , the voltage is 15v, and anodized for 5min to obtain a three-stage formed foil; place the three-stage formed foil in a solution of 7wt% ammonium adipate and 0.01wt% maleic acid at ...

Embodiment 2

[0019] Example 2: Pretreatment: Put the low-pressure corrosion foil into a mixed aqueous solution of 15wt% γ-butyrolactone and 1wt% maleic acid at a temperature of 50°C for 3 minutes; put the pretreated aluminum foil in 10wt% adipic di ammonium phosphate and 0.1wt% maleic acid solution, temperature 60°C, current density 50mA / cm 2 , the voltage is 10v, and anodized for 7 minutes to obtain a primary formed foil; the primary formed foil is placed in a solution of 10wt% ammonium adipate and 0.1wt% maleic acid at a temperature of 60°C and a current density of 50mA / cm 2 , the voltage is 20v, and anodized for 7 minutes to obtain a secondary formed foil; the secondary formed foil is placed in a solution of 10wt% ammonium adipate and 0.1wt% maleic acid at a temperature of 60°C and a current density of 50mA / cm 2 , the voltage is 30v, and anodized for 7min to obtain a tertiary formed foil; place the tertiary formed foil in a solution of 10wt% ammonium adipate and 0.01wt% maleic acid at a...

Embodiment 3

[0020] Example 3: Pretreatment: Put the low-pressure corrosion foil into a mixed aqueous solution of 30wt% γ-butyrolactone and 2wt% maleic acid at a temperature of 60°C for 1 min; put the pretreated aluminum foil in 15wt% adipic di ammonium phosphate and 0.5wt% maleic acid solution, temperature 80°C, current density 100mA / cm 2 , the voltage is 20v, and anodized for 10min to obtain a primary formed foil; the primary formed foil is placed in a solution of 15wt% ammonium adipate and 0.5wt% maleic acid at a temperature of 80°C and a current density of 100mA / cm 2, the voltage is 40v, and anodized for 10min to obtain a secondary formed foil; the secondary formed foil is placed in a solution of 15wt% ammonium adipate and 0.5wt% maleic acid at a temperature of 80°C and a current density of 100mA / cm 2 , the voltage is 60v, and anodized for 10min to obtain a three-stage formed foil; place the three-stage formed foil in a solution of 15wt% ammonium adipate and 0.01wt% maleic acid at a te...

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Abstract

The invention provides a formation method for relieving a wavy edge of a low-voltage formed foil, which is characterized in that the process route comprises pretreatment, five-stage formation treatment, washing, polarization treatment, washing, primary repair formation treatment, washing, middle treatment, thermal treatment, secondary repair formation treatment and drying treatment. The formationmethod has the advantages that the wavy edge of the low-voltage formed foil is relieved, the effective width of the formed foil is increased, and the edge is good in each index.

Description

technical field [0001] The invention relates to a forming method for reducing the wavy edge of a low-pressure forming foil. Background technique [0002] The existing manufacturing method of forming foil for low-voltage aluminum electrolytic capacitors is: directly place the voltage corrosion foil in the ammonium adipate solution with a concentration of 3-10wt%, at a temperature of 70°C, and a current density of 500mA / cm 2 The formation voltage is 10V for 5-7min, and then under the same solution conditions, the formation voltage is 40V for 5-7min, and the formation voltage is 80V for 7-10min, and the formation voltage is 100V for 15-20min; take it out and wash it with 5wt% phosphoric acid solution for 60 Immerse at ℃ for 2-5 minutes for depolarization treatment; take it out and wash it with water; place it in a repairing formation tank with a formation voltage of 100V for a repairing formation of 5-7 minutes; take it out and wash it; place it at 400-500°C for heat treatment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04H01G9/055C25D11/12C25D11/10
CPCC25D11/10C25D11/12H01G9/04H01G9/055
Inventor 严季新陈健王建中吴春春
Owner NANTONG HAIXING ELECTRONICS
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