Plastic-coated printing

Dalian metal plastic coating in the existing technology, the production of two-color electronic device shell, such as mobile phone upper shell method can be, using different colors of raw materials, in the injection molding machine two-color injection to get the two-color shell. However, the shell surface of injection molding is dark in color, poor in texture, easy to be affected by the environment and color change or even corrosion, it is difficult to attract consumers in the market. Painting should be installed and removed in turn cover, increase the process, and the two-color shell must be painted four times (two primers, two topcoats), the production efficiency is low.

Another defect of this method is that this method itself determines the high defect rate, the cover is loose with the fixed groove, and the paint of one color will penetrate into the other color part of the shell surface through the crack, resulting in the defect. If the cover is too tight with the fixed groove, it will be difficult to remove the cover after painting, easy to peel the paint surface and form defective products. The junction of two paints on the shell, due to the fluidity of the paint, forms a zigzag or wavy line, and the unclear boundary affects the appearance of the shell.

Plastic itself by polarity, can be divided into non-polar materials and polar materials. For polar materials, the function key of the material is open and can be directly linked with the function key of the paint.