Colored plastic casing and preparation method

Abstract

The invention discloses a colored plastic casing and a preparation method. According to the colored plastic casing and the preparation method, colors L*, a* and b* of the plastic casing are split, firstly, during colored injection molding, the a* and b* values of the colored plastic casing are controlled through control on the component proportions of an injection molding material, control on thea* and b* values of the injection-molded plastic casing or control on the color value of a texture layer according to different actual requirements, and then the L* value of the colored plastic casingis controlled through control on the color value of the reflecting layer, and finally, the required L* a* b* colored plastic casing is formed. Meanwhile, the magnetron sputtering, CVD or evaporationmanner is adopted during film coating, so that the risk of breakage due to relatively large deformation during lamination can be avoided.

Description

technical field [0001] The invention relates to the field of colored plastic casings, in particular to a colored plastic casing and a preparation method. Background technique [0002] Mobile phones, computers, tablet computers, VR and other electronic products are smart devices that are often used today, and their shell settings are particularly important. Among them, the color production of the shells of electronic products is particularly important. In the process of making the color of the electronic product casing, the color difference formula of the color difference meter used in the industry is commonly used: CIEL*a*b* color space, L*,*a,b* is the chromaticity value representing the color of the object, also It is the color space coordinates of the color, and any color has a unique coordinate value; where L* represents lightness (black and white), *a represents red-green, and b* represents yellow-blue; it is the modern color difference evaluation according to the Inter...

AI Technical Summary

Problems solved by technology

This will bring the following problems: (1) The more color layers of the coating layer, the more dispersed the color difference of the coating layer, which will lead to lower yield

(2) Because the coating layer needs to use high refractive index materials, but its thickness is generally only between 5-100nm, a slight change in its thickness will cause a large color difference, because the more coatings, the color levels displayed by the coating layer will result feel bad

(3) When the decorative film is pasted on the inner surface of the 3D plastic shell, the more layers are required, the thicker the coating layer is, and the easier the coating layer is to break in areas with greater stress and strain, resulting in poor appearance

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