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A method for removing marking paint on metal shells

A metal shell, marking paint technology, applied in the direction of chemical paint/ink remover, coating, etc., to achieve the effect of a simple method

Active Publication Date: 2016-08-17
SHENZHEN ZHENHUA MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a method for removing marking paint on metal casings, aiming at solving the problem of how to remove the marking paint simply and effectively without damaging the metal casing

Method used

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  • A method for removing marking paint on metal shells
  • A method for removing marking paint on metal shells
  • A method for removing marking paint on metal shells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A kind of marking paint removal method for metal casing

[0029] After smearing a hardener with a thickness of 0.4mm on the marking paint, bake it at 90°C for 60 minutes to obtain a cured film layer of the marking paint; peel off the cured film layer of the marking paint to obtain a separated hardener curing film layer marking paint and metal Housing, wipe the metal housing with a cotton ball containing ethanol to remove contaminants.

[0030] Wherein, the hardening agent comprises the following components in mass percentage:

[0031] Polyurethane 45%;

[0032] Propylene glycol methyl ether acetate 20%;

[0033] Xylene 20%;

[0034] Ethylbenzene 10%;

[0035] Toluene diisocyanate 5%.

Embodiment 2

[0036] Embodiment 2 A method for removing marking paint for metal casings

[0037] After smearing a hardener with a thickness of 0.6mm on the marking paint, bake it at 95°C for 63 minutes to obtain the cured film of the marking paint; after peeling off the cured film of the marking paint, use a cotton ball containing XD-709B washing board water Wipe the metal case to remove contamination.

[0038] Wherein, the hardening agent comprises the following components in mass percentage:

[0039] Polyurethane 40%;

[0040] Propylene glycol methyl ether acetate 25%;

[0041] Xylene 20%;

[0042] Ethylbenzene 10%;

[0043] Toluene diisocyanate 5%.

Embodiment 3

[0044] Embodiment 3 A method for removing marking paint for metal casings

[0045] After smearing a hardener with a thickness of 0.75mm on the marking paint, bake it at 85°C for 55 minutes to obtain a cured film of the marking paint; after peeling off the cured film of the marking paint, use a cotton ball containing acetone and ethanol to wash the board Wipe the metal case to remove contamination.

[0046] Wherein, the hardening agent comprises the following components in mass percentage:

[0047] Polyurethane 45%;

[0048] Propylene glycol methyl ether acetate 25%;

[0049] Xylene 15%;

[0050] Ethylbenzene 10%;

[0051] Toluene diisocyanate 5%.

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Abstract

The invention is applicable to the field of chemical industry, and provides a metal case marking paint removal method which comprises the following steps: coating a marking paint with a hardening agent, curing the marking paint to obtain a marking paint curing film layer; and stripping the marking paint curing film layer; wherein the curing processing method is as follows: in the condition of 90 + / -5 DEG C, performing dry processing for 60 + / -5 minutes; the metal case marking paint removal method does not damage a metal case, can clearly remove the marking paint, and is simple.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for removing marking paint on metal shells. Background technique [0002] At present, some products packaged in high-reliability fully-sealed metal casings use polymer inks as marking paints, and the inks used must pass the solvent resistance (method 2015.1 in GJB548B-2005) test, so the adhesion is strong. When the logo needs to be changed, chemical solvents cannot be used to remove the logo. Common removal methods are physical methods such as blade scraping and grinding, but the use of physical methods will inevitably damage the surface coating of the metal shell, resulting in a decrease in product reliability and unqualified appearance. Especially for gold-plated metal shells, it is more difficult to handle. Due to the low hardness of gold, it is very easy to destroy the gold-plated layer to expose the underlying metal when using conventional physical meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D9/00C23G5/036
CPCC09D9/00C23G5/036
Inventor 方彬彬孙元鹏方先华万帮卫刘远征林政
Owner SHENZHEN ZHENHUA MICROELECTRONICS