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Novel mobile phone back cover and production process thereof

A mobile phone back cover, a new technology, applied in layered products, other household appliances, synthetic resin layered products, etc., can solve the problem of low efficiency of sheet transfer and PVD coating, low product yield, large odor and bubble point and other problems, to achieve the effect of reducing scratch defects, improving product yield, and good stretchability

Pending Publication Date: 2019-08-02
HENGSHAN JIACHENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing production process of PC+PMMA mobile phone back cover is basically: PC+PMMA composite sheet→UV transfer printing texture→PVD brightening→screen printing ink→cutting→hot bending forming→curing hardening layer→UV curing→CNC trimming →Molding, the main defects of this process are: 1. The thermal shrinkage rate of PC material and PMMA material is inconsistent, which will cause warping and rebound when the traditional PC+PMMA composite explosion-proof film is subjected to UV transfer printing and high temperature ring test after wire drawing As a result, deformation is caused, and the traditional explosion-proof film cannot meet the forming of four curved surfaces and the hot bending of deep curved surfaces; 2. The efficiency of sheet transfer and PVD coating is too low, and the cost is very high; 3. The existing processing methods are usually in PC After the material is hot-bent and shaped, it is then spray-coated or dip-coated to harden the material, which will produce a large odor and bubble point, resulting in a low product yield and a corresponding increase in production costs

Method used

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  • Novel mobile phone back cover and production process thereof
  • Novel mobile phone back cover and production process thereof
  • Novel mobile phone back cover and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as figure 1 As shown, a new type of mobile phone back cover includes an explosion-proof base material layer 1 and a PC sheet layer 2. The explosion-proof base material layer 1 is an aliphatic TPU film formed by tape casting or coating or is coated with acrylic resin and subjected to UV The acrylic resin film formed by curing or PC substrate, the explosion-proof substrate layer 1 is coated with an adhesive layer 3 formed of acrylic pressure-sensitive adhesive or hot melt adhesive, and one side of the PC sheet layer 2 is coated with a hardened layer 4 , the other side of the PC board layer 2 is coated with a layer of water vapor barrier coating 5 and compounded with the adhesive layer 3 .

[0054] The new mobile phone back cover provided by the above embodiment, because the explosion-proof base material layer is an aliphatic TPU film formed by tape casting or coating, or an acrylic resin film coated with acrylic resin and formed by UV curing, or a PC base material, ...

Embodiment 2

[0069] Such as figure 2 As shown, the difference between the novel mobile phone rear cover provided in this embodiment and the novel mobile phone rear cover in Embodiment 1 is only the difference in the surface structure of the explosion-proof base material layer 1, and the lower layer of the explosion-proof base material layer 1 in the present embodiment A layer of UV ink silk screen printing layer 8 is formed on the surface by UV ink silk screen printing, and a layer of PVD brightening layer 7 is formed on the upper surface of the explosion-proof substrate layer 1 by sputtering, and a layer of PVD brightening layer 7 is formed on the upper surface of PVD brightening layer 7 by UV transfer printing texture. The UV transfer layer 6 , the adhesive layer 3 is coated on the UV transfer layer 6 .

[0070] As another aspect of this embodiment, a new mobile phone back cover production process includes the following steps:

[0071] a) The aliphatic TPU film formed by tape casting o...

Embodiment 3

[0082] Such as image 3 As shown, the difference between the novel mobile phone rear cover provided in this embodiment and the novel mobile phone rear cover in Embodiment 1 is only the difference in the surface structure of the explosion-proof base material layer 1, and the upper layer of the explosion-proof base material layer 1 in the present embodiment A layer of UV ink silk screen printing layer 8 is formed on the surface by UV ink silk screen printing, and a layer of PVD brightening layer 7 is formed on the upper surface of UV ink screen printing layer 8 by sputtering, and a layer of PVD brightening layer 7 is formed on the upper surface of PVD brightening layer 7 by UV transfer printing texture. The UV transfer layer 6 , the adhesive layer 3 is coated on the UV transfer layer 6 .

[0083] As another aspect of this embodiment, a new mobile phone back cover production process includes the following steps:

[0084] a) The aliphatic TPU film formed by tape casting or coatin...

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Abstract

The invention provides a novel mobile phone back cover and a production process thereof, and relates to the technical field of photoelectric products. The novel mobile phone back cover comprises an anti-explosion base material layer and a PC board layer; the anti-explosion base material layer is an aliphatic TPU film formed through tape casting or coating or an acrylic acid resin film which is coated with acrylic acid resin and formed through UV curing or a PC base material; the anti-explosion base material layer is coated with an adhesive layer formed by acrylic acid pressure-sensitive adhesive or hot melt adhesive; and one side of the PC board layer is coated with one hardening layer and the other side of the PC board layer is coated with one vapor barrier coating and is compounded withthe adhesive layer. Warping deformation of the material in the processing process can be avoided to a great degree, bubble points are reduced and the product yield is increased.

Description

technical field [0001] The invention relates to the technical field of photoelectric products, in particular to a novel mobile phone back cover and its production process. Background technique [0002] With the popularization of electronic products, electronic products such as smartphones have penetrated into thousands of households and become an indispensable part of daily life. From the 2G era to the 3G era to the 4G era, and the upcoming 5G communication, the future of mobile phones The cover material is also changed from plastic to metal, then to glass ceramics, and then to PC and PMMA composite materials with good communication, and the products are always innovating. [0003] In the research on 3D cover panels for mobile phones, PC / PMMA composite panels have become a current hot spot. Due to the advent of the 5G era, the mobile phone 3D cover market is also facing a reshuffle, glass and ceramics will take advantage of the trend, metals will be eliminated, and traditio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/08B32B27/30B32B27/36B32B27/40B32B7/12B32B27/06B32B7/06B32B37/24B32B37/12B29D99/00
CPCB32B27/08B32B27/40B32B27/308B32B27/365B32B7/12B32B7/06B32B37/12B32B37/24B29D99/006B32B2255/28B32B2255/26B32B2255/10B32B2037/243B32B2250/24B32B2307/546B32B2457/00
Inventor 刘文亮谢金沛
Owner HENGSHAN JIACHENG NEW MATERIAL
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