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A method for surface treatment of plastic parts

A surface treatment and plastic parts technology, applied in the field of plastic parts surface treatment, can solve the problems of cumbersome process, high energy consumption and high cost, and achieve the effect of low raw material price, low energy consumption and pollution avoidance

Active Publication Date: 2018-12-04
NINGBO RUNNER INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] With the improvement of the country's control of electroplating pollution, the traditional hexavalent chromium electroplating is subject to more and more restrictions, and the resulting trivalent chromium electroplating is gradually accepted, but due to the cumbersome process, high cost, high energy consumption and pollution Big, will eventually be eliminated

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  • A method for surface treatment of plastic parts
  • A method for surface treatment of plastic parts
  • A method for surface treatment of plastic parts

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Embodiment Construction

[0046] Below in conjunction with embodiment the present invention is described in further detail.

[0047] The plastic part surface treatment method comprises the following steps:

[0048] 1) Polish and clean the surface of the workpiece to remove burrs, oil stains and residual release agents, static electricity and dust on the surface of the workpiece;

[0049] 2) Spraying the first organic coating on the surface of the substrate after treatment, the first organic coating is an epoxy-modified acrylic resin passed through a 400 mesh screen and dissolved in a special diluent.

[0050] The quality of described epoxy modified acrylic resin consists of:

[0051]

[0052] The mass composition of special diluent is:

[0053] Trimethylolpropane Triacrylate 66.2%

[0054] Dipropylene glycol diacrylate 33.8%

[0055] Mix the epoxy-modified acrylic resin and the special diluent uniformly at a weight ratio of 1:1 to obtain the first organic coating with a viscosity of 13±3Pa·s. T...

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Abstract

The invention relates to a surface treatment method of plastic parts. The surface treatment method comprises the following steps: 1) cleaning the surface of a workpiece; 2) spraying a first organic coating; 3) putting the workpiece into an infrared furnace to carry out leveling drying; 4) putting the workpiece into an ultraviolet curing oven to carry out curing by ultraviolet radiation; 5) hanging the workpiece to a PVD (Plating Vacuum Deposition) furnace, carrying out vacuum evaporation and plating aluminum films to obtain a semi-finished product of which the surface is silver and bright; 6) spraying a second organic coating to the semi-finished product; 7) putting the workpiece into the infrared furnace to carry out pre-drying leveling; 8) putting the workpiece into the ultraviolet curing oven to obtain a finished product. According to the invention, the technological process is simple, the energy consumption is low, zero discharge of wastewater is realized in the whole process, and the pollution to the surrounding environment is avoided; furthermore, the raw materials are low in price and easy to purchase, and no obvious differences occur between the appearance and performances of the coating and the appearance and performances of an electroplating chromium product, and the coating has good corrosion resistance, excellent salt fog performances and higher level in comparison with the traditional plating SC4, so as to be especially suitable for harsh environments of bathrooms and the like.

Description

technical field [0001] The invention relates to a surface treatment method of a plastic part. Background technique [0002] At present, the demand for plastic electroplating in the entire sanitary ware and automobile industry is increasing year by year. Electrochrome plating is an important technology in plastic electroplating. The chrome plating layer has strong passivation performance, has a silvery white luster appearance, and can be maintained for a long time. is widely used. [0003] With the improvement of the country's control of electroplating pollution, the traditional hexavalent chromium electroplating is subject to more and more restrictions, and the resulting trivalent chromium electroplating is gradually accepted, but due to the cumbersome process, high cost, high energy consumption and pollution Big, will eventually be eliminated. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an imitation electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C23C14/20C23C14/24C09D163/10C09D175/14C09D5/08
CPCC08J7/0423C09D5/08C09D163/10C09D175/14C23C14/20C23C14/24C08L75/14
Inventor 郑航李河昆王应泉王飞
Owner NINGBO RUNNER INDAL CORP
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