Plastic non-chrome roughening treatment method and water-saving electroplating method thereof

A roughening treatment and plastic technology, which is applied in the field of chrome-free roughening treatment of plastics and water-saving electroplating, can solve the problems of process defects, uneven bonding force, limited plastic substrates, etc., and achieves broad prospects, stable process, excellent The effect of interlayer adhesion

Active Publication Date: 2018-06-29
蒙城繁枫真空科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still many shortcomings in the current plastic electroplating process, such as (1) the entire electroplating process is not environmentally friendly, causing great harm to the human body and environmental pollution; (2) the plastic substrates that can be used for electroplating are very limited, only ABS, PC / ABS, nylon and other engineering plastics can be plated with metal layers on their surface, such as copper, nickel, chromium, etc.
(3) The washing process involved in the electroplating process of the prior art is as many as more than 30 channels, and the water consumption is extremely large
Moreover, the chemicals used, such as hexavalent chromium and trivalent chromium, are harmful to the human body, and the discharged wastewater is not easy to treat, causing serious pollution to the environment.
[0003] In recent years, many scientific and technical personnel and experts have proposed some improvement methods to solve the above-mentioned unenvironmental protection problems, mainly chemical methods and physical methods. However, due to the defects in the process, there is no effective method that can be mass-produced.
The mainstream of the chemical method is to use potassium permanganate instead of hexavalent chromium (chromic anhydride) as a roughening method for plastic pretreatment. There are many studies in this area, and it is stated that the method is feasible, but it has not been widely used so far. The reason, or because: first, potassium permanganate is a strong oxidant, which is still harmful to the human body and the environment
Second, the bonding force between the plastic and the metal coating obtained by this chemical method is uneven and unstable.
However, although the physical method is relatively ideal, it has not been widely used for more than 5 years. The reason is that the bonding force between the plastic substrate and the metal coating of this method is too low, and it is still in urgent need of improvement.

Method used

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  • Plastic non-chrome roughening treatment method and water-saving electroplating method thereof
  • Plastic non-chrome roughening treatment method and water-saving electroplating method thereof
  • Plastic non-chrome roughening treatment method and water-saving electroplating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Take the injection molding workpiece of ABS plastic, follow the above steps and figure 1 Flow chart for chrome-free roughening green electroplating.

[0082] Step 1: Put the ABS workpiece into a chromium-free roughening solution for cleaning (removing oil and wax) and micro-corrosion process. The temperature in the tank is 30°C, and it is cleaned by ultrasonic vibration for 5 minutes.

[0083] Step 2: Take out the ABS workpiece, put it into another modified bonding solution of the adhesion promoter, and dip the adhesion promoter for 40 seconds, then take it out, put it in an oven and bake it at 70°C for 40 minutes.

[0084] Step 3: Implement oxygen plasma activation treatment in the PVD furnace, hang the ABS workpiece in the PVD furnace, and evacuate to 7×10 - 3 Pa, and then implement oxygen plasma glow oxidation on the surface of the workpiece, the treatment time is 5min, the bias voltage is 300V, the flow rate of argon gas is 500SCCM, and the flow rate of oxygen ga...

Embodiment 2

[0103] The injection molded parts of PC / ABS plastics are subjected to chromium-free roughening green electroplating according to the technical scheme of the present invention.

[0104] Step 1: Put the PC / ABS workpiece (the content of ABS is 75%, the content of PC is 25%) into the chromium-free roughening solution for cleaning (removing oil and wax) and micro-corrosion process. The temperature in the tank is 40°C, and the ultrasonic vibration cleaning is performed for 18 minutes.

[0105] Step 2: Take out the PC / ABS workpiece, put it into another modified adhesive solution of the adhesion promoter, and dip the adhesion promoter for 45 seconds, then take it out, put it in an oven and bake it at 70°C for 45 minutes.

[0106] Step 3: Implement oxygen plasma activation treatment in the PVD furnace, hang the PC / ABS workpiece into the PVD furnace, and evacuate to 7×10 -3 Pa, and then implement oxygen plasma glow oxidation on the surface of the workpiece, the treatment time is 5min, ...

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Abstract

The invention provides a plastic non-chrome roughening treatment method and a water-saving electroplating method thereof. A plastic workpiece is put into a non-chrome roughening solution to be treated; the surface of the treated plastic workpiece is coated with a binding force accelerant in a dipping manner; finally, the plastic workpiece is subject to plasma activation treatment. According to thetechnical scheme, the better interlayer binding force can be achieved between obtained plastic and a coating, the traditional electroplating process can be completely replaced, in the whole process that the surface of the plastic workpiece is electroplated with a chromium film, toxic chemicals of hexavalent chromium or trivalent chromium and the like are not used, the discharge amount of waste water can be 50% of or lower than the discharge amount of traditional electroplated water, the process is stable, commercial mass production is achieved, and the green surface treatment process with thewide prospect is provided.

Description

technical field [0001] The invention belongs to the technical field of electroplating, and in particular relates to a chromium-free roughening treatment method for plastics and a water-saving electroplating method. Background technique [0002] One of the main functions of plastic electroplating is to enhance the decorativeness of the plated parts of the product, to provide an exquisite metal appearance and a variety of colors, and the second is to improve the hardness and wear resistance of the product surface. With the improvement of society and quality of life, the application of plastic electroplating is increasing day by day. However, there are still many shortcomings in the current plastic electroplating process, such as (1) the entire electroplating process is not environmentally friendly, causing great harm to the human body and environmental pollution; (2) the plastic substrates that can be used for electroplating are very limited, only ABS, PC / ABS, nylon and other...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C14/20C23C14/02C23C14/06C25D5/14C25D5/56
CPCC23C14/02C23C14/021C23C14/0641C23C14/205C23C28/322C23C28/34C25D5/14C25D5/56
Inventor 赵铁军
Owner 蒙城繁枫真空科技有限公司
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