Plastic shell structure and preparation method thereof

Abstract

The invention discloses a plastic shell structure. The plastic shell structure comprises a plastic shell and a PET composite decorative film attached to the inner side surface of the plastic shell. The PET composite decorative film comprises a PET substrate, and the PET substrate comprises a fitting surface and a decoration surface. The decoration surface of the PET substrate is provided with an ink printing layer, a UV grain layer and an optical coating layer in sequence; the optical coating layer of the PET composite decorative film is provided with an LDS antenna. The invention also discloses a manufacturing method of a plastic shell structure. The large-area waterproof and dustproof antenna manufactured in the plastic shell solves the industrial problems that the surface of the fragmented and dispersive electronic component assembly structures in a traditional 3C electronic product plastic shell has no enough space to design a 5G signal antenna, and when the antenna is made at thesurface of the plastic shell, the product appearance decoration effect is influenced, the antenna is easy to be damaged to cause whole damaging of the product and difficult to maintain. The plastic shell structure has glass or ceramic appearance effects, is light and fashion and novel in appearance, and is anti-fall and waterproof.

Description

technical field [0001] The invention relates to a shell structure, in particular to a plastic shell structure and a preparation method thereof. Background technique [0002] With the advent of the 5G era, due to the demand for 5G wireless signals, 3C electronic products such as mobile phones, wearable products, and mobile electronics have begun to slowly adopt materials such as plastics, glass, and ceramics that have less impact on millimeter wave signals to solve common problems. The metal, carbon fiber and other material casings affect the antenna signal, while increasing the number of antennas, and innovating antenna structures and processes to meet the needs of 5G networks. [0003] Although materials such as glass and ceramics have little interference with the millimeter wave of 5G wireless signals, the production time of the 3D glass hot pressing process is long, the ceramic material is hard and difficult to process, and the processes such as sweeping and CNC grinding ...

AI Technical Summary

Problems solved by technology

[0003] Although materials such as glass and ceramics have little interference with the millimeter wave of 5G wireless signals, the production time of the 3D glass hot pressing process is long, the ceramic material is hard and difficult to process, and the processes such as sweeping and CNC grinding are complicated, resulting in cumbersome and time-consuming processes. , low yield rate, high production cost, and the limited overall production capacity of the existing industry limit its large-scale application in commonly used 3C electronic products, and it can only be used as a shell material for high-end products

[0004] At the same time, glass and ceramic materials are high in strength but poor in toughness, easy to break and not resistant to impact, etc., which lead to their limited application range. Due to the difficulty of processing, it is impossible to make complex assembly structures such as buckles, which often use glue or adhesive to stick on the plastic or metal shell. Once the glass structure is damaged, it is difficult to repair the overall structure. Product after-sales and maintenance have brought great difficulties

[0005] Although glass and ceramic materials enhance the fashion and novelty of product appearance and meet the needs of 5G wireless network signals, in the field of high-end electronic products, customization, modularization, and disassembly at will have become the direction of high-end product applications. The glass structural parts of the bonding process are bonded with glue or back glue, which cannot meet the needs of providing customized and fashionable detachable structures for high-end customers; it further limits the application of ceramics and glass, so in combination, in manufacturing, product structure, In terms of scope of application, production capacity, maintenance and after-sales service, glass and ceramics are restricted in various aspects and cannot be widely used on a large scale. Commonly used materials for 3C electronic products are still mainly plastic

[0006] Although plastic materials can be directly injection molded, with low cost and high production capacity, but because of the ordinary decorative effect of traditional spraying or coating process, less options and single effect, and aesthetic fatigue caused by common application over the years, it lacks fashion and beauty. The high-end atmospheric surface decoration effect is far inferior to the surface texture effect of glass or ceramic shells; in addition, the hardness of plastic itself is only about 1H, which is much lower than that of glass or ceramics above 7-9H, which is very easy to use in the daily use of 3C electronic equipment. Scratches, abrasions, and paint fall off, thereby damaging the decorative effect of the surface, so the overall effect is far worse than the fashionable and fashionable glass and ceramics, and it gives people the impression of low-end and cheap, and cannot achieve high value-added production and application

[0007] The wireless network of 3C electronic products has developed into the 5G era. Although the transmission speed of millimeter waves is fast, the electromagnetic wave diffraction ability is poor due to the short wavelength. Although plastic materials have little effect on 5G wireless signals, 5G signals are very sensitive to the antenna position. 5G signal requirements, high-frequency millimeter wave wireless transmission needs to increase the number of antennas to improve performance

Each traditional antenna requires at least a few millimeters of space, a 4×4 mimo antenna requires an area of ​​10mm×10mm, and an 8×8 array antenna requires a larger area. However, due to the complex internal structure and various components of plastic products, the product can be used for 5G Antenna structure and design space is extremely limited and fragmented, making it difficult to meet the needs of coherent and large-area design of 5G antennas inside the product;

[0008] At the same time, the design of 5G antennas on the surface of the product not only severely limits the realization effect of the surface decoration, but also gives people a low-end feeling. At the same time, bumps and falls in daily use can easily cause damage to the antenna under the surface decoration layer of the product and cause The product was completely damaged, which brought great challenges to the design of 5G signal antennas for 3C electronic products, and it was difficult to meet the needs of 5G wireless networks

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