A mobile phone back cover with haze gradient and a preparation method thereof
By tilting the polishing fixture at an angle of 2° or 3° and using a sponge brush or a filament brush, combined with specific parameters, the problems of uneven haze gradient effect and health risks were solved, achieving a stable visual and tactile effect.
Patent Information
- Application Number
- CN202611005675.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-07
- Publication Date
- 2026-11-06
AI Technical Summary
Existing technologies struggle to achieve uniform haze gradient effects, chemical polishing methods suffer from poor stability and pose health risks, and physical polishing parameters are difficult to control.
Using a polishing fixture with an inclination angle of 2° or 3°, combined with a sponge brush or a filament brush, and with polishing treatment at specific speeds, pressures, and times, a continuous haze gradient effect is created.
It achieves a stable haze gradient effect, avoiding layering and health risks, and enhancing the visual experience and tactile feel.
Smart Images
Figure CN123039863A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of glass polishing, and more particularly to a mobile phone back cover with a haze gradient and its preparation method. Background Technology
[0002] Currently, conventional mobile phone cover plates are made of clear glass or frosted glass. However, this appearance is too monotonous, and the light transmittance of frosted glass is poor, which limits the display effect of many exquisite patterns. Therefore, researchers are committed to developing glass with haze gradient for use in the field of mobile phone cover plates.
[0003] Developing glass with haze gradients is a powerful way to enhance the competitiveness of related products. Glass polishing is generally achieved through polishing machines or chemical polishing. Chemical polishing usually involves chemically treating the glass surface to create an uneven effect. However, chemical polishing is difficult to control in terms of haze gradients, has poor stability, and produces obvious layering transitions, easily creating distinct dividing lines and resulting in a poor visual experience. In addition, it is easy to generate harmful waste gases and liquids, which can cause significant harm to the human body.
[0004] Given the unavoidable drawbacks of chemical polishing, researchers have turned their attention to physical polishing. However, physical polishing often has difficult parameters to control and the effective polishing area is relatively limited. Therefore, how to achieve a uniform gradient effect using a polishing machine is a problem that is currently difficult to solve. Summary of the Invention
[0005] To address the technical problems existing in the background art, the present invention proposes a method for preparing a mobile phone back cover with a haze gradient. The preparation method includes the following steps: tilting the mobile phone back cover and polishing the mobile phone back cover with a brush to obtain a mobile phone back cover with a haze gradient.
[0006] Preferably, the tilting of the phone back cover is achieved by fixing the phone back cover onto a polishing fixture.
[0007] Preferably, the polishing fixture is divided into an upper top surface and a lower top surface, and the mobile phone back cover is fixed to the upper top surface of the polishing fixture.
[0008] Preferably, the angle of inclination between the top surface of the polishing fixture and the horizontal plane is either 2° or 3°.
[0009] In this invention, the choice of the tilt angle is closely related to the final gradient effect. Because the tilt angle of the polishing fixture is 2° / 3°, different friction angles are formed, resulting in a gradient effect without obvious layering. Changing the angle, such as the plane angle, will result in no gradient effect.
[0010] Preferably, the brush is a sponge brush or a filament brush.
[0011] In this invention, only sponge brushes and filamentous brushes can be selected; brushes made of other materials cannot achieve this natural gradient effect. The reason why sponge brushes and filamentous brushes can achieve the polishing effect of this invention is that the material and hardness of the brush are directly related to the friction effect. When using a brush with high hardness (such as the pig bristle brush in the comparative example), brush marks will appear on the product surface, affecting the tactile feel and visual effect. The sponge brush has a certain degree of elasticity. When the substrate to be polished is tilted at a certain angle, the sponge is compressed more at the higher point of the tilted surface, resulting in greater friction and a larger amount of material removed. At the lower point of the tilted surface, the sponge is compressed less and only lightly brushes across the surface, removing less material. This creates a visual effect of gradual haze on a macroscopic scale. The ends of the flower-shaped bristle brush contain fine filaments, which not only have a certain degree of toughness, but also have different cutting angles and contact pressures at the ends of the filaments under the action of tilt angle and polishing pressure. Adjacent filaments rub and polish the surface of the substrate in turn, which can also form a visual effect of gradual haze on a macroscopic scale.
[0012] Preferably, the polishing conditions are: polishing speed of 230 RPM ± 20, polishing pressure of 100 KG ± 10, and polishing time of 60-90 s.
[0013] In this invention, the polishing parameters are not conventionally selected. Only under the synergistic effect of specific rotation speed, pressure, and time, combined with the aforementioned tilting fixture and specific brush, can the haze on the glass surface present a continuous and delicate transition effect. If the parameters deviate from this range, it may lead to undesirable phenomena such as an overly harsh gradient area, an overly narrow transition zone, or optical interference fringes. That is, when the brush rotation speed is mismatched, obvious horizontal stripes of different colors will appear in the transition area of the product. When the polishing pressure is too high or the time is too long, the surface of the product will be completely swept away due to excessive friction.
[0014] The present invention also proposes a haze gradient mobile phone back cover, which is obtained by the preparation method described in any one of claims 1-6.
[0015] Preferably, the haze of the haze-gradient mobile phone back cover includes four stages, with a haze difference of H5 between each adjacent stage.
[0016] Beneficial effects of this invention: (1) Physical polishing has good stability. Through a combination of specific angles, media and parameters, the resulting mobile phone back cover will not have obvious layering transition. (2) No corrosive chemical reagents are needed during the physical polishing process, thus avoiding harm to human health. Attached Figure Description
[0017] Figure 1 A three-dimensional view of the polishing fixture; Figure 2 This is a schematic diagram of the gradient effect on the back cover of the mobile phone in Example 1; Figure 3 This is a schematic diagram of the gradient effect on the back cover of the mobile phone in Example 2. Detailed Implementation
[0018] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention.
[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
[0020] The technical solution of the present invention will now be described more clearly and completely with reference to specific embodiments and comparative examples.
[0021] Example 1
[0022] This embodiment proposes a haze gradient mobile phone back cover, the preparation method of which is shown below: The phone back cover (AG glass, 95% haze) is fixed on the polishing fixture, which is tilted at an angle of 2°. Then, a sponge brush is fixed on the polishing machine to polish the phone back cover. The polishing conditions were as follows: polishing speed of 230 RPM, polishing pressure of 100 KG, and polishing time of 75 seconds.
[0023] Example 2
[0024] This embodiment proposes a haze gradient mobile phone back cover, the preparation method of which is shown below: The phone back cover (AG glass, 95% haze) is fixed on the polishing fixture, which is tilted at an angle of 3°. Then, the filigree brush is fixed on the polishing machine to polish the phone back cover. The polishing conditions were as follows: polishing speed of 240 RPM, polishing pressure of 90 KG, and polishing time of 80 s.
[0025] Example 3
[0026] This embodiment proposes a haze gradient mobile phone back cover, the preparation method of which is shown below: The phone back cover (AG glass, 95% haze) is fixed on the polishing fixture, which is tilted at an angle of 3°. Then, the filigree brush is fixed on the polishing machine to polish the phone back cover. The polishing conditions were as follows: polishing speed of 230 RPM, polishing pressure of 110 KG, and polishing time of 60 s.
[0027] Example 4
[0028] This embodiment proposes a haze gradient mobile phone back cover, the preparation method of which is shown below: The phone back cover (AG glass, 95% haze) is fixed on the polishing fixture, which is tilted at an angle of 2°. Then, a sponge brush is fixed on the polishing machine to polish the phone back cover. The polishing conditions were as follows: polishing speed of 210 RPM, polishing pressure of 90 KG, and polishing time of 90 s.
[0029] Comparative Example 1 This comparative example presents a mobile phone back cover, the preparation method of which is the same as that of Example 1, except that "the tilt angle of the polishing fixture is 2°" is replaced with "the plane of the polishing fixture".
[0030] Comparative Example 2 This comparative example presents a mobile phone back cover, which is prepared in the same way as in Example 1, except that the "sponge brush" is replaced with a "pig bristle brush".
[0031] Comparative Example 3 This comparative example presents a mobile phone back cover, the preparation method of which is the same as that of Example 1, except that "polishing speed of 230 RPM" is replaced with "polishing speed of 180 RPM".
[0032] Comparative Example 4 This comparative example proposes a mobile phone back cover, the preparation method of which is the same as that of Example 1, except that "polishing pressure is 100KG" is replaced with "polishing pressure is 120KG".
[0033] The performance of the mobile phone back covers obtained in Examples 1-3 and Comparative Examples 1-3 was tested, as detailed in Table 1: Table 1. Performance test results of the mobile phone back cover obtained from each embodiment and comparative example.
[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A method for preparing a mobile phone back cover with a haze gradient, characterized in that, The preparation method includes the following steps: tilting the back cover of the mobile phone and polishing the back cover of the mobile phone with a brush to obtain a back cover of the mobile phone with a haze gradient.
2. The method for preparing a mobile phone back cover with haze gradient according to claim 1, characterized in that, The tilting of the phone back cover is achieved by fixing the phone back cover onto a polishing fixture.
3. The method for preparing a mobile phone back cover with haze gradient according to claim 2, characterized in that, The polishing fixture is divided into an upper top surface and a lower top surface, and the back cover of the mobile phone is fixed on the upper top surface of the polishing fixture.
4. The method for preparing a mobile phone back cover with haze gradient according to claim 3, characterized in that, The upper surface of the polishing fixture is inclined at an angle of 2° or 3° to the horizontal plane.
5. The method for preparing a mobile phone back cover with haze gradient according to any one of claims 1-4, characterized in that, The brush is either a sponge brush or a filigree brush.
6. The method for preparing a mobile phone back cover with haze gradient according to any one of claims 1-5, characterized in that, The polishing conditions are as follows: polishing speed is 230 RPM ± 20, polishing pressure is 100 KG ± 10, and polishing time is 60-90 seconds.
7. A mobile phone back cover with a haze gradient, characterized in that, It is obtained by the preparation method described in any one of claims 1-6.
8. The haze-gradient mobile phone back cover according to claim 7, characterized in that, The haze of the phone back cover with haze gradient includes four stages, and the haze difference between each adjacent stage is H5%.