Composite material consumer electronics rear shell and preparation method thereof

Abstract

The invention discloses a composite material consumer electronic product rear shell and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a first part: 1.1, carrying out UV transfer printing on the surface of a base material to form a first texture layer with a release function; 1.2, the surface of the first texture layer is coated with hardening liquid, and then the hardening liquid forms a semi-solidified layer; (2) preparing a second part: 2.1, screen-printing bottom covering ink on the surface of the fiber reinforced composite material to form an ink layer; 2.2, performing UV transfer printing on the surface of the ink layer to form a second texture layer; 2.3, forming an optical coating layer on the surface of the second texture layer; 2.4, forming a transparent protective layer on the surface of the optical coating layer; (3) compounding the first part and the second part: 3.1, compounding the semi-cured layer and the protective layer by virtue of an adhesive; and 3.2, stripping the first texture layer and the base material to expose the semi-cured layer, and carrying out secondary curing on the semi-cured layer to form a cured layer. The product prepared by the method is relatively low in thickness, and relatively ideal hardness and wear resistance can be achieved.

Description

technical field [0001] The invention relates to the technical field of manufacturing rear shells of consumer electronic products, and more particularly to a rear shell of composite consumer electronic products and a preparation method thereof. Background technique [0002] With the advent of the 5G era, the back covers of consumer electronic products such as mobile phones, tablets, and notebook computers are gradually being phased out due to the influence of metal on the signal, while the PMMA / PC composite board will not affect the mobile phone signal due to its plastic material properties. Surface coating and other processes can achieve high surface hardness (glass-like effect), and the inner layer can achieve colorful decorative effects through UV transfer / PVD / screen printing processes, so it is widely used in mobile phone back covers. At present, the PMMA / PC composite board plastic mobile phone back cover generally adopts 0.5mm or 0.64mm specification. When the thickness ...

AI Technical Summary

Problems solved by technology

At present, the main process of the back cover of the glass fiber board is to perform silk screen printing on the surface of the glass fiber board, then perform the transfer process, then perform physical vapor deposition PVD, and then form the middle layer, and then transfer the outer texture layer on the surface of the middle layer. This process can realize the colorful texture effect similar to the composite board obtained by glass fiber material, but because the external texture glue must consider the adhesion on the one hand, and realize the hardness and scratch resistance of steel wool on the other hand, it is difficult to balance. Compared with the traditional The steel wool scratch resistance of the composite board is more than 2,500 times. At present, this process can only achieve the steel wool scratch resistance of 500 times, which greatly reduces the reliability of the product and limits its application.