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A method for improving the uniformity of PVD thin plating on the surface of plastic products and its application

A technology for plastic products and uniformity, which is applied in the field of improving the uniformity of PVD thin coating on the surface of plastic products and the thin coating treatment of plastic decorative parts. It can solve the problems of low cost and poor quality of thin coating, and achieve low cost and improved coating uniformity. sexual effect

Active Publication Date: 2020-10-02
HUNAN SOKAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects of poor thin coating quality in existing vapor deposition technology, the purpose of this invention is to provide a method for improving the uniformity of PVD thin coating on the surface of plastic products. Equivalent, and the process controllability is good, the cost is low, and it is easy to realize large-scale industrial application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Wipe the back cover of the phone with a dust-free cloth dipped in absolute alcohol;

[0033] Step 2: Spray the pretreatment layer sequentially on the convex surface of the back cover of the mobile phone, so that the subsequent primer layer can better adhere to the substrate. The thickness of the sprayed film is 7-8 μm, and it is baked at 60-70°C for 5-10mim;

[0034] Step 3: Spray UV curing primer on the convex surface of the back cover of the mobile phone after spraying the pretreatment layer. The spraying process is as follows: take 100 parts by weight of UV curing primer, 10 parts by weight of curing agent, and 50 parts by weight of thinner, and stir them evenly Filter with 400 mesh gauze, spray film thickness is 20-25μm, curing energy is 400mJ / cm 2 ;

[0035] Step 4. Cut the coated indium wire according to the following conditions and put it into the ZHL-900 vertical evaporator:

[0036] (1) Adjust the orientation of all evaporation tanks so that the slots...

Embodiment 2

[0043] Compared with Example 1, the difference is: in step 4, 0.2cm, 0.4cm and 0.7cm indium wires are respectively placed in the upper, middle and lower evaporation tanks, the coating thickness deviation is ≤8nm, and the yield rate is >95% .

Embodiment 3

[0045] Compared with Example 1, the difference is: in step 4, 0.2cm, 0.6cm and 0.9cm indium wires are respectively placed in the upper, middle and lower evaporation tanks, the coating thickness deviation is ≤6nm, and the yield rate is >95% .

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PUM

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Abstract

The invention provides a method for improving PVD thin plating uniformity on the surfaces of plastic products. The method comprises the following steps that a vertical evaporation machine is selected,and the orientation of all evaporation tanks is adjusted so that notches can face upwards; the evaporation tanks are divided into an upper part, a middle part and a lower part in the longitudinal direction, 1 part by weight of a film material is placed in the evaporation tanks at the upper part, 2 to 3 parts by weight of the film material are placed in the evaporation tanks at the middle part, and 3.5 to 4.5 parts by weight of the film material are placed in the evaporation tanks at the lower part; and the plastic parts to be coated are placed in a vertical evaporation machine for vacuum coating. By the adoption of the method and application, the coating uniformity is remarkably improved, the product yield is remarkably increased, the cost is low, and the method and application are especially suitable for surface metallization of plastic decorative parts such as mobile phone rear covers.

Description

technical field [0001] The invention relates to the technical field of plastic surface treatment, in particular to a method for improving the uniformity of PVD thin plating on the surface of plastic products, especially suitable for the thin plating treatment of plastic decorative parts such as mobile phone back covers, and avoiding the influence of decorative effects due to uneven thickness of the plating layer. Background technique [0002] Metallizing the plastic surface can combine the characteristics of plastic such as light weight, easy molding, and low price with the advantages of metal, such as electrical conductivity, magnetic permeability, weldability, and decoration, and expand the application field of plastics. The most traditional method is to electroplate the surface of plastic products, which requires roughening of hexavalent chromium and multiple electroplating processes. Not only is the process cumbersome, the treatment efficiency is low, and it will generate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/20C23C14/24H04M1/02
CPCC23C14/20C23C14/24H04M1/0283
Inventor 刘建富伍松李平李玉良缪培凯吕国强杨波凌云剑
Owner HUNAN SOKAN NEW MATERIAL