CN112105180A

CN112105180A - Gradual change curved surface base material and manufacturing method thereof, cover plate and device

Info

Publication number: CN112105180A
Application number: CN201910527312.0A
Authority: CN
Inventors: 邹攀
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-12-18

Abstract

The invention relates to a gradual change curved surface base material, a manufacturing method thereof, a cover plate and a device. The manufacturing method of the gradual change curved surface substrate comprises the following steps: providing a transparent curved substrate, wherein the curved substrate is provided with a surface to be decorated, and the surface to be decorated is a curved surface; manufacturing a gradual change mesh point layer on the surface to be decorated by adopting a yellow light process; and transfer printing is carried out on the surface to be decorated to form an ink layer, the ink layer covers the gradual change net point layer, and the color of the ink layer is different from that of the gradual change net point layer. The manufacturing method of the gradient curved surface base material can manufacture gradient on the curved surface base material.

Description

Gradual change curved surface base material and manufacturing method thereof, cover plate and device

Technical Field

The invention relates to a gradual change curved surface base material, a manufacturing method thereof, a cover plate and a device.

Background

The current gradient color is usually realized on a flat plate by a silk-screen printing mode, but the silk-screen printing mode is difficult to realize on a curved surface base material, so that the color of the current curved surface base material is single.

Disclosure of Invention

In view of the above, it is necessary to provide a method for manufacturing a gradient curved substrate capable of manufacturing a gradient on a curved substrate.

In addition, a gradual change curved surface substrate, a cover plate and a device are also provided.

A manufacturing method of a gradual change curved surface substrate comprises the following steps:

providing a transparent curved substrate, wherein the curved substrate is provided with a surface to be decorated, and the surface to be decorated is a curved surface;

manufacturing a gradual change mesh point layer on the surface to be decorated by adopting a yellow light process; and

and transfer printing is carried out on the surface to be decorated to form an ink layer, the ink layer covers the gradual change net point layer, and the color of the ink layer is different from that of the gradual change net point layer.

According to the manufacturing method of the gradual change curved surface base material, the gradual change mesh point layer is manufactured on the surface to be decorated through the yellow light process, and then the ink layer with the color different from that of the gradual change mesh point layer is formed through the transfer printing mode, so that the gradual change color is manufactured on the curved surface.

The gradual change curved surface base material comprises a transparent curved surface base plate, a gradual change mesh point layer and an ink layer, wherein the curved surface base plate is provided with a decorative surface, the decorative surface is a curved surface, the gradual change mesh point layer is arranged on the decorative surface, the ink layer is arranged on the decorative surface and covers the gradual change mesh point layer, and the color of the ink layer is different from that of the gradual change mesh point layer.

The gradual change curved surface base material has gradual change, and has better expressive force compared with the gradual change curved surface base material with single color. And the substrate with the gradually-changed curved surface has a more fine mesh point structure, and the gradually-changed effect is more fine.

The cover plate is manufactured by the gradual change curved surface base material manufactured by the manufacturing method of the gradual change curved surface base material or the gradual change curved surface base material.

The cover plate has gradient color, and has better expressive force compared with a curved cover plate with a single color. And above-mentioned apron has more meticulous site structure, and the gradual change effect is more meticulous.

The device comprises the cover plate, and the device is an electronic device or a battery.

The cover plate of the device is of a gradient curved surface structure, and has better expressive force compared with a single-color gradient curved surface base material; and the cover plate of the device has a more fine mesh point structure, and the gradual change effect is more fine.

Drawings

FIG. 1 is a flow chart of a method for fabricating a substrate with a gradual curved surface according to an embodiment;

fig. 2 is a partial schematic view of a mask plate used in step S120 of the method for manufacturing a substrate with a gradually-varying curved surface shown in fig. 1;

fig. 3 is a partial schematic view of a graded dot layer manufactured in step S120 of the method for manufacturing a graded curved substrate shown in fig. 1;

fig. 4 is a partial effect diagram after the color ink layer is manufactured in step S130 of the method for manufacturing a substrate with a gradually-varying curved surface shown in fig. 1;

FIG. 5 is a schematic structural diagram of a substrate with a gradually-varying curved surface according to an embodiment;

FIG. 6 is a partial cross-sectional view of the graded curved substrate shown in FIG. 5;

fig. 7 is a cross-sectional view of the curved substrate of the graded curved substrate shown in fig. 5.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, a method for manufacturing a gradually-curved substrate according to an embodiment can realize the manufacture of a gradual change on a curved substrate, and the method for manufacturing a gradually-curved substrate includes the following steps:

step S110: providing a transparent curved substrate, wherein the curved substrate is provided with a surface to be decorated, and the surface to be decorated is a curved surface.

Specifically, the curved substrate has an inner concave surface and an outer convex surface opposite to each other, and the surface to be decorated may be the inner concave surface or the outer convex surface. In one embodiment, the substrate with a gradually-changing curved surface is a cover plate of an electronic device or a battery, and the surface to be decorated is an inner concave surface.

In one embodiment, the curved substrate is curved glass. It is understood that the curved substrate may be other transparent substrates, such as a polycarbonate and polymethyl methacrylate composite substrate (PC/PMMA composite substrate), a polyethylene terephthalate and polymethyl methacrylate composite substrate (PET/PMMA composite substrate), a polycarbonate substrate (PC board), or a polyethylene terephthalate substrate (PET board). Herein, "/" is shown as being layered.

Step S120: and manufacturing a gradual change mesh point layer on the surface to be decorated by adopting a yellow light process.

Specifically, step S120 includes: forming a photosensitive layer on the surface to be decorated by using ultraviolet photosensitive ink; the photosensitive layer is irradiated by ultraviolet light under the protection of a mask plate (as shown in fig. 2), and then is developed and cured in sequence to obtain a gradient dot layer. And carrying out shading protection on the part of the photosensitive layer to be removed through a mask plate, then removing the part which is not irradiated by ultraviolet light, namely the part shielded by the mask plate, through development, and then curing the photosensitive layer remained on the surface to be decorated to form a gradual change dot layer. The ultraviolet light sensitive ink may be, for example, a beautiful BPR series UV sensitive ink.

In one embodiment, the color of the gradient dot layer is black. It is understood that the color of the gradient dot layer can be adjusted as desired.

In one embodiment, the step of forming a photosensitive layer on the surface to be decorated comprises: and (3) spraying or spin-coating ink on the surface to be decorated by using ultraviolet photosensitive ink, and drying to form the photosensitive layer. The ultraviolet light sensitive ink can be relatively flatly formed on the surface (curved surface) to be decorated by spraying or spin coating, and the problem of unevenness of a photosensitive layer caused by difficulty in leveling of the ink for screen printing due to the curved surface can be avoided.

In one embodiment, the drying step is: baking at 80-100 deg.c for 5-10 min. And a drying step after the ultraviolet light sensitive ink is sprayed or spin-coated on the surface to be decorated, so that the photosensitive layer has certain strength, and the subsequent manufacturing is convenient. It is understood that the curing temperature and time of the photosensitive layer can be adjusted according to the ink.

In one embodiment, the curing step after development is: baking at 150-240 deg.c for 10-30 min. It will be appreciated that the curing temperature and time may be adjusted depending on the specific properties of the photosensitive layer.

In one embodiment, the thickness of the graded dot layer is 2 microns to 4 microns. The thickness of the gradual change dot layer is too thin, so that the color is too light, the color of the ink layer is penetrated out, and on the premise of ensuring the color display of the gradual change dot layer, the thinner the thickness of the gradual change dot layer is, the better the thickness is, so that the manufacturing cost is reduced as much as possible.

In one embodiment, the gradient dot layer has a plurality of dots arranged at intervals, the width of the dots of the gradient dot layer changes gradually from the edge to the center of the surface to be decorated, and the distance between adjacent dots changes gradually. As shown in fig. 4, in the illustrated embodiment, the width of the dots of the graded dot layer gradually decreases from the edge to the center of the surface to be decorated; and the distance between the adjacent screen dots of the gradual change screen dot layer is gradually increased from the edge to the center of the surface to be decorated. It is understood that in other embodiments, the widths of the dots of the graded dot layer may also be gradually increased from the edge to the center of the surface to be decorated; and the distance between the adjacent screen dots of the gradual change screen dot layer is gradually reduced from the edge to the center of the surface to be decorated.

In one embodiment, the width of the mesh point with the smallest width is less than 0.01 mm. By adopting the yellow light process to form the gradient mesh point layer, the gradient mesh point layer can be finer and the mesh points are smaller. Specifically, the width of the dot with the largest width is not more than 0.1 mm. It is understood that the width of the dots is not limited to the above width, and the width of the dots can be set according to the requirement.

It is to be understood that the gradient dot layer is not limited to the above gradient form, and the gradient dot layer may also be disposed on a local portion of the surface to be decorated to form a gradient change on the local portion of the surface to be decorated.

Wherein, the shape of the net points can be positive direction, diamond, circle, ring, etc.

Step S130: and transfer printing is carried out on the surface to be decorated to form an ink layer, the ink layer covers the gradual change net point layer, and the color of the ink layer is different from that of the gradual change net point layer.

In this case, the effect of the curved substrate with the ink layer and the gradation dot layer is shown in fig. 4.

Specifically, step S130 includes: pad printing the ink on the surface to be decorated by using a pad printing rubber head, and enabling the ink to cover the gradual change net point layer; the ink is then cured to form an ink layer. Wherein, the pad printing rubber head is a profiling rubber head of the surface to be decorated.

In this embodiment, the ink layer is a color ink layer. The color ink may be a color ink commonly used in the art, for example, a fine HF series color ink.

In one embodiment, in the step of curing the ink, the curing temperature is 150 ℃ to 180 ℃ and the curing time is 10 minutes to 30 minutes. It will be appreciated that the curing temperature and time of the ink layer can be adjusted depending on the specific properties of the ink.

In one embodiment, the ink layer has a thickness of 2 to 4 microns. The pigment used in the color ink is usually an organic pigment, and is usually semitransparent, if the thickness of the ink layer is too thin, the more transparent the ink layer is, and the lighter the color is, and on the premise of ensuring the color quality of the ink layer, the thinner the thickness of the ink layer is, the better the ink layer is, so as to reduce the manufacturing cost as much as possible.

Further, the distance from the orthographic projection of the edge profile of the ink layer on the surface to be decorated to the edge of the surface to be decorated is greater than the distance from the orthographic projection of the edge profile of the gradual change mesh point layer on the surface to be decorated to the edge of the surface to be decorated, so that when the gradual change form of the gradual change mesh point layer is the form in fig. 4, the exposure of the ink layer on the surface to be decorated is avoided as far as possible. In one embodiment, the orthographic projection of the edge contour of the ink layer on the surface and the orthographic projection of the edge contour of the gradual change dot layer on the surface to be decorated are different by 0.1 mm-0.2 mm.

Step S140: and forming a reflecting layer on one side of the ink layer far away from the surface to be decorated.

The reflection layer is formed on one side of the ink layer, which is far away from the surface to be decorated, so that the gradient on the substrate with the gradually-changed curved surface is brighter, and the expressive force is better.

Specifically, the reflecting layer is manufactured by a vacuum non-conductive electroplating process. Wherein the reflecting layer is at least one selected from an indium tin oxide layer, a titanium dioxide layer, a niobium trioxide layer, a niobium dioxide layer, a niobium pentoxide layer, a silicon dioxide layer and a zirconium dioxide layer.

Step S150: and performing transfer printing on one side of the reflecting layer, which is far away from the ink layer, to form a light shielding layer, so as to obtain the gradually-changed curved surface base material.

Specifically, step S150 includes: and (4) pad printing the shading printing ink to one side of the reflecting layer, which is far away from the printing ink layer, by using a pad printing rubber head, and then curing to form a shading layer. Wherein, the pad printing rubber head is also a profiling rubber head of the surface to be decorated.

In this embodiment, the color of the light-shielding ink may be the same as or different from the color of the gradation dot layer. The light-shielding ink is an ink having a light-shielding effect. Specifically, the light-shielding ink is black ink or white ink, the pigment of the black ink is usually carbon black, the pigment of the white ink is usually titanium dioxide, and the two substances have good light-shielding effects, so that the light-shielding effect can be achieved. Preferably, the light-shielding ink is a black ink having a better light-shielding effect than a white ink.

In one embodiment, the thickness of the light-shielding layer is 2 to 4 micrometers, and the thinner the light-shielding layer is, the poorer the light-shielding effect is, and the light-shielding layer in the above range can not only shield light well, but also can avoid the excessive thickness of the light-shielding layer. It is understood that the thickness of the light-shielding layer can be adjusted as needed.

The manufacturing method of the gradual change curved surface substrate has the following advantages:

It should be noted that the manufacturing of the tapered curved substrate is not limited to the above steps, for example, step S140 may be omitted, and in this case, the light shielding layer is directly pad-printed on the side of the ink layer away from the surface to be decorated. Alternatively, both steps S140 and S150 are omitted, and in this case, the ink layer may be a black ink layer or a white ink layer having a light shielding effect, in addition to the color ink layer.

As shown in fig. 5, the substrate 200 with a gradually-curved surface according to an embodiment can be manufactured by the above-mentioned method for manufacturing a substrate with a gradually-curved surface. The substrate 200 with a gradually-changing curved surface can be processed into a cover plate, and the cover plate can be a cover plate of an electronic device (such as a mobile phone, a tablet computer, etc.) or a battery.

Referring to fig. 6, the substrate 200 includes a transparent curved substrate 210, a graded dot layer 220, an ink layer 230, a reflective layer 240, and a light-shielding layer 250.

Referring to fig. 7, the curved substrate 210 has a decorative surface 212, and the decorative surface 212 is a curved surface. Specifically, the curved substrate 210 has an inner concave surface and an outer convex surface opposite to each other, and the decorative surface 212 may be the inner concave surface or the outer convex surface. In the illustrated embodiment, the decorative surface 212 is an internal concave surface.

In one embodiment, the curved substrate 210 is curved glass. It is understood that the curved substrate 210 may also be other transparent substrates, such as a polycarbonate and polymethyl methacrylate composite substrate (PC/PMMA composite substrate), a polyethylene terephthalate and polymethyl methacrylate composite substrate (PET/PMMA composite substrate), a polycarbonate substrate (PC board), or a polyethylene terephthalate substrate (PET board).

A gradient dot layer 220 is disposed on the decorative surface 212. The graded dot layer 220 has a plurality of dots 222 arranged at intervals. In one embodiment, the width of the dots 222 varies gradually from the edge to the center of the decorative surface 212, and the spacing between adjacent dots 222 varies gradually. In the illustrated embodiment, the width of the dots 222 of the gradient dot layer 220 gradually decreases from the edge to the center of the decorative surface 212; and the spacing between adjacent dots 222 increases from the edge to the center of the decorative surface 212. It is understood that in other embodiments, the width of the dots 222 may also be gradually increased from the edge to the center of the decorative surface 212; and the spacing between adjacent dots 222 gradually decreases from the edge to the center of the decorative surface 212.

It is understood that the gradient dot layer 220 is not limited to the gradient form, and the gradient dot layer 220 may be disposed on a local portion of the decorative surface 212 to form a gradient change on the local portion of the decorative surface 212.

In one embodiment, the minimum width dots 222 have a width of 0.01mm or less. By forming the graded dot layer 220 using a yellow light process, the graded dot layer 220 can be finer and the dots 222 smaller. Specifically, the width of the dots 222 of the maximum width is 0.1mm or less. It is understood that the width of the dots 222 is not limited to the above width, and the width of the dots 222 can be set according to the requirement.

The shape of the dots 222 may be a square, a diamond, a circle, a ring, etc.

In one embodiment, the thickness of the graded dot layer 220 is 2 microns to 4 microns. The thickness of the gradient dot layer 220 is too thin, which results in a too light color, and the color of the ink layer 230 is revealed, and on the premise of ensuring the color display of the gradient dot layer 220, the thinner the thickness of the gradient dot layer 220 is, the better, so as to reduce the manufacturing cost as much as possible.

The ink layer 230 is disposed on the decorative surface 212 and covers the gradient dot layer 220, and the color of the ink layer 230 is different from the color of the gradient dot layer 220. In this embodiment, the ink layer 230 is a color ink layer.

In one embodiment, the thickness of ink layer 230 is 2 microns to 4 microns. The pigment used in the color ink is usually an organic pigment, and is usually semitransparent, and if the thickness of the ink layer 230 is too thin, the more transparent the ink layer 230 is, and the lighter the color is, and on the premise of ensuring the color quality of the ink layer 230, the thinner the thickness of the ink layer 230 is, the better the ink layer 230 is, so as to reduce the manufacturing cost as much as possible.

Further, the distance from the orthographic projection of the edge profile of the ink layer 230 on the decorative surface 212 to the edge of the decorative surface 212 is greater than the distance from the orthographic projection of the edge profile of the gradient dot layer 220 on the decorative surface 212 to the edge of the decorative surface 212, so that when the gradient form of the gradient dot layer 220 is the effect of fig. 4, the exposure of the ink layer 230 on the surface of the decorative surface 212 is avoided as much as possible. In one embodiment, the orthographic projection of the edge profile of the ink layer 230 on the surface and the orthographic projection of the edge profile of the gradient dot layer 220 on the decorative surface 212 are different by 0.1mm to 0.2 mm.

The reflective layer 240 is disposed on a side of the ink layer 230 away from the decorative surface 212, and the reflective layer 240 can make the gradient on the substrate 200 brighter, thereby providing better expressive power. Specifically, the reflective layer 240 is selected from at least one of an indium tin oxide layer, a titanium dioxide layer, a niobium trioxide layer, a niobium dioxide layer, a niobium pentoxide layer, a silicon dioxide layer, and a zirconium dioxide layer.

The light-shielding layer 250 is disposed on a side of the reflective layer 240 away from the ink layer 230. In this embodiment, the color of the light-shielding layer 250 may be the same as or different from that of the gradient dot layer 220. Specifically, the light-shielding layer 250 is a black ink layer or a white ink layer. Because the pigment of the black ink is usually carbon black, the pigment of the white ink is usually titanium dioxide, and the two substances have better shading effect, the black ink and the white ink can play a role in shading light. Preferably, the light-shielding layer 250 is a black ink layer having a better light-shielding effect than the white ink layer.

In one embodiment, the thickness of the light-shielding layer 250 is 2 to 4 micrometers, and the thinner the light-shielding layer 250 is, the poorer the light-shielding effect is, and the light-shielding layer 250 in the above range can not only shield light well, but also prevent the light-shielding layer 250 from being too thick. It is understood that the thickness of the light-shielding layer 250 can be adjusted as needed.

The gradual change curved surface substrate 200 has at least the following advantages:

the substrate 200 with a gradually changing curved surface has a gradually changing color, and has a better expressive force compared with a substrate with a gradually changing curved surface with a single color. And the substrate 200 with the gradually-changed curved surface has a more fine mesh point structure, and the gradually-changed effect is more fine.

It should be noted that the tapered curved substrate 200 is not limited to the above structure, for example, in other embodiments, the reflective layer 240 may be omitted, and in this case, the light shielding layer 250 is disposed on the side of the ink layer 230 away from the decorative surface 212. Alternatively, the reflective layer 240 and the light-shielding layer 250 are both omitted, and in this case, the ink layer 230 may be a color ink layer, or a white ink layer or a black ink layer having a light-shielding effect.

The apparatus of an embodiment is an electronic device or a battery, and the electronic device is, for example, a mobile phone, a tablet computer, or the like. The device comprises a cover plate, wherein the cover plate is obtained by processing the substrate with the gradually-changing curved surface obtained by the manufacturing method of the substrate with the gradually-changing curved surface or the substrate with the gradually-changing curved surface. The cover plate of the device is of a gradient curved surface structure, and has better expressive force compared with a single-color gradient curved surface base material.

It is understood that the substrate with the gradually-curved surface is not limited to be used as a cover plate of electronic equipment or a battery, and can also be used in other fields needing gradually-curved surface decoration.

The following is a specific example (the following examples take the fabrication of the gradual curved substrate 200 shown in fig. 6 as an example, and the curved substrate takes curved glass as an example, but the present invention is not limited to the following examples):

example 1

The manufacturing process of the substrate with the gradually-changed curved surface of the embodiment is as follows:

(1) providing transparent curved glass, wherein the curved glass is provided with an inner concave surface, and the inner concave surface is a surface to be decorated.

(2) Spraying black ultraviolet light sensitive ink (beautiful BPR series) on the surface to be decorated, and baking at 90 ℃ for 8 minutes to form a photosensitive layer; and (3) carrying out ultraviolet irradiation on the photosensitive layer under the protection of a mask plate, and then sequentially carrying out development and baking at 200 ℃ for 20 minutes to obtain a gradient mesh point layer with the thickness of 3 micrometers. The width of the minimum mesh point of the gradual change mesh point layer is 0.01mm, the width of the maximum mesh point is 0.1mm, and the width of the mesh point of the gradual change mesh point layer is gradually reduced from the edge to the center of the surface to be decorated; the distance between adjacent dots of the gradual change dot layer is gradually increased from the edge to the center of the surface to be decorated.

(3) Using a copying transfer printing rubber head to transfer printing color ink (a fine HF series) onto the surface to be decorated, and enabling the color ink to cover the gradual-change net point layer; the color ink was then cured at 160 ℃ for 20 minutes to form an ink layer having a thickness of 3 microns. Wherein, the orthographic projection of the edge outline of the ink layer on the surface and the orthographic projection of the edge outline of the gradual change net point layer on the surface to be decorated have a difference of 0.15mm, and the color of the color ink is red.

(4) And forming a reflecting layer on one side of the ink layer far away from the surface to be decorated by vacuum non-conductive electroplating. Wherein, the reflecting layer is an indium tin oxide layer.

(5) Using a copying transfer printing rubber head to transfer print black shading ink onto the reflecting layer; and then, curing the shading ink to form a shading layer with the thickness of 3 microns, thereby obtaining the gradually-changed curved surface substrate.

Observing the substrate with the gradually-changed curved surface from one side of the substrate with the gradually-changed curved surface, which is far away from the decorative surface, under the desk lamp: the gradual change curved surface substrate has obvious double-colored gradual change effect, and the net point profile is clear.

Example 2

(2) Using black ultraviolet light sensitive ink (beautiful BPR series) to spin on the surface to be decorated with ink, and then baking for 5 minutes at 100 ℃ to form a photosensitive layer; and (3) carrying out ultraviolet irradiation on the photosensitive layer under the protection action of a mask plate, and then sequentially carrying out development and baking at 240 ℃ for 10 minutes to obtain a gradient mesh point layer with the thickness of 4 micrometers. The width of the minimum mesh point of the gradual change mesh point layer is 0.01mm, the width of the mesh point of the maximum width is 0.1mm, and the width of the mesh point of the gradual change mesh point layer is gradually reduced from the edge to the center of the surface to be decorated; and the distance between the adjacent screen dots of the gradual change screen dot layer is gradually increased from the edge to the center of the surface to be decorated.

(3) Using a copying transfer printing rubber head to transfer printing color ink (a fine HF series) onto the surface to be decorated, and enabling the color ink to cover the gradual-change net point layer; the color ink was then cured at 180 ℃ for 10 minutes to form an ink layer having a thickness of 2 microns. Wherein, the orthographic projection of the edge outline of the ink layer on the surface and the orthographic projection of the edge outline of the gradual change net point layer on the surface to be decorated have a difference of 0.1mm, and the color of the color ink is yellow.

(4) And forming a reflecting layer on one side of the ink layer far away from the surface to be decorated by vacuum non-conductive electroplating. Wherein, the reflecting layer is a titanium dioxide layer.

(5) Using a copying transfer printing rubber head to transfer print black shading ink onto the reflecting layer; and then curing the shading ink to form a shading layer with the thickness of 4 microns, thereby obtaining the gradual-change curved surface base material.

Example 3

(2) Spraying black ultraviolet light sensitive ink (beautiful BPR series) on the surface to be decorated, and baking at 80 ℃ for 10 minutes to form a photosensitive layer; and (3) carrying out ultraviolet irradiation on the photosensitive layer under the protection action of a mask plate, and then sequentially carrying out development and baking at 150 ℃ for 30 minutes to obtain a gradient mesh point layer with the thickness of 2 micrometers. The width of the minimum mesh point of the gradual change mesh point layer is 0.01mm, the width of the mesh point of the maximum width is 0.1mm, and the width of the mesh point of the gradual change mesh point layer is gradually reduced from the edge to the center of the surface to be decorated; and the distance between the adjacent screen dots of the gradual change screen dot layer is gradually increased from the edge to the center of the surface to be decorated.

(3) Using a copying transfer printing rubber head to transfer printing color ink (a fine HF series) onto the surface to be decorated, and enabling the color ink to cover the gradual-change net point layer; and curing the color ink at 150 ℃ for 30 minutes to form an ink layer with the thickness of 2-4 microns. Wherein, the orthographic projection of the edge outline of the ink layer on the surface and the orthographic projection of the edge outline of the gradual change net point layer on the surface to be decorated have a difference of 0.2mm, and the color of the color ink is blue.

(4) And forming a niobium dioxide layer on one side of the ink layer far away from the surface to be decorated by vacuum non-conductive electroplating, and then forming a silicon dioxide layer on one side of the niobium dioxide layer far away from the ink layer by vacuum non-conductive electroplating.

(5) Using a copying transfer printing rubber head to transfer print black shading ink onto the silicon dioxide layer; and then, curing the shading ink to form a shading layer with the thickness of 2 microns, thereby obtaining the gradually-changed curved surface substrate.

Example 4

(2) Using black ultraviolet light sensitive ink (beautiful BPR series) to spin on the surface to be decorated with ink, and then baking at 85 ℃ for 7 minutes to form a photosensitive layer; and (3) carrying out ultraviolet irradiation on the photosensitive layer under the protection of a mask plate, and then sequentially carrying out development and baking at 180 ℃ for 15 minutes to obtain a gradient mesh point layer with the thickness of 3 micrometers. The width of the minimum mesh point of the gradual change mesh point layer is 0.01mm, the width of the mesh point of the maximum width is 0.1mm, and the width of the mesh point of the gradual change mesh point layer is gradually reduced from the edge to the center of the surface to be decorated; and the distance between the adjacent screen dots of the gradual change screen dot layer is gradually increased from the edge to the center of the surface to be decorated.

(3) Using a copying transfer printing rubber head to transfer printing color ink (a fine HF series) onto the surface to be decorated, and enabling the color ink to cover the gradual-change net point layer; the color ink was then cured at 170 ℃ for 20 minutes to form an ink layer having a thickness of 4 microns. Wherein, the orthographic projection of the edge outline of the ink layer on the surface and the orthographic projection of the edge outline of the gradual change dot layer on the surface to be decorated have a difference of 0.18mm, and the color of the color ink is rosy.

(4) The method comprises the steps of forming a niobium sesquioxide layer on one side, far away from the surface to be decorated, of an ink layer through vacuum non-conducting electroplating, forming a zirconium dioxide layer on one side, far away from the ink layer, of the niobium sesquioxide layer through vacuum non-conducting electroplating, forming a niobium dioxide layer on one side, far away from the niobium sesquioxide layer, of the zirconium dioxide layer through vacuum non-conducting electroplating, forming a silicon dioxide layer on one side, far away from the zirconium dioxide layer, of the niobium dioxide layer through vacuum non-conducting electroplating, and forming a niobium pentoxide layer on one side, far away from the niobium dioxide layer, of the silicon dioxide layer through vacuum non-conducting electroplating.

(5) Using a copying transfer printing rubber head to transfer and print black shading ink to one side of the niobium pentoxide layer far away from the silicon dioxide layer; and then, curing the shading ink to form a shading layer with the thickness of 3 microns, thereby obtaining the gradually-changed curved surface substrate.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The manufacturing method of the gradual change curved surface base material is characterized by comprising the following steps:

2. The method for manufacturing a gradually-curved substrate according to claim 1, wherein the step of manufacturing the gradually-curved dot layer on the surface to be decorated by adopting a yellow light process comprises: forming a photosensitive layer on the surface to be decorated by using ultraviolet photosensitive ink; and carrying out ultraviolet irradiation on the photosensitive layer under the protection action of a mask plate, and then developing and curing in sequence to obtain the gradient mesh point layer.

3. The method for manufacturing a substrate with a gradually-changing curved surface according to claim 2, wherein the step of forming a photosensitive layer on the surface to be decorated by using the ultraviolet photosensitive ink comprises: and spraying or spin-coating the ultraviolet light sensitive ink on the surface to be decorated, and drying to form the photosensitive layer.

4. The method for manufacturing a substrate with a gradually-changing curved surface according to claim 1, wherein the step of pad-printing an ink layer on the surface to be decorated comprises: pad printing ink on the inner concave surface by using a pad printing rubber head, and enabling the ink to cover the gradually-changed screen dot layer; the ink is then cured to form the ink layer.

5. The method for manufacturing a substrate with a gradually-changing curved surface according to any one of claims 1 to 4, wherein the ink layer is a color ink layer; and after the step of forming the ink layer on the surface to be decorated by transfer printing, the step of forming a light shielding layer on the ink layer by transfer printing is also included.

6. The method for manufacturing a substrate with a gradually-changing curved surface according to claim 5, wherein after the step of forming the ink layer by pad printing on the surface to be decorated and before the step of forming the light-shielding layer by pad printing on the ink layer, the method further comprises the step of forming a reflecting layer on one side of the ink layer away from the surface to be decorated by vacuum non-conductive electroplating; the reflecting layer is at least one selected from an indium tin oxide layer, a titanium dioxide layer, a niobium trioxide layer, a niobium dioxide layer, a niobium pentoxide layer, a silicon dioxide layer and a zirconium dioxide layer; the step of printing on the ink layer to form the light shielding layer comprises the following steps: and performing pad printing on one side of the reflecting layer, which is far away from the ink layer, to form the light shielding layer.

7. The method for manufacturing a substrate with a gradually-changing curved surface according to any one of claims 1 to 4, wherein the ink layer is a color ink layer, a white ink layer or a black ink layer.

8. The gradual change curved surface base material is characterized by comprising a transparent curved surface base plate, a gradual change mesh point layer and an ink layer, wherein the curved surface base plate is provided with a decorative surface, the decorative surface is a curved surface, the gradual change mesh point layer is arranged on the decorative surface, the ink layer is arranged on the decorative surface and covers the gradual change mesh point layer, and the color of the ink layer is different from that of the gradual change mesh point layer.

9. The graded curved substrate of claim 8, wherein the graded dot layer has a plurality of dots arranged at intervals; from the edge to the center of the decorative surface, the width of the mesh points is changed in a gradual change mode, and the distance between the adjacent mesh points is changed in a gradual change mode.

10. The graded curved substrate of claim 9, wherein the width of the mesh point with the smallest width is below 0.01 mm.

11. The substrate according to claim 8, wherein the ink layer is a colored ink layer, a white ink layer, or a black ink layer.

12. The substrate according to claim 8, wherein the ink layer is a color ink layer, and the substrate further comprises a light-shielding layer disposed on a side of the ink layer away from the decorative surface.

13. The graded curved substrate of claim 12, wherein the graded dot layer has a plurality of dots arranged at intervals; from the edge to the center of the decorative surface, the width of the mesh points is gradually reduced, and the distance between the adjacent mesh points is gradually increased; the distance from the orthographic projection of the edge profile of the ink layer on the decorative surface to the edge of the decorative surface is greater than the distance from the orthographic projection of the edge profile of the gradient mesh point layer on the decorative surface to the edge of the decorative surface.

14. The substrate with a gradually curved surface according to claim 13, wherein an orthographic projection of the edge profile of the ink layer on the decorative surface is different from an orthographic projection of the edge profile of the gradually-changed dot layer on the decorative surface by 0.1mm to 0.2 mm.

15. The graded curved substrate of claim 12, further comprising a reflective layer disposed between the ink layer and the light shield layer.

16. The graded curved substrate of claim 15, wherein the reflective layer is selected from at least one of an indium tin oxide layer, a titanium dioxide layer, a niobium trioxide layer, a niobium dioxide layer, a niobium pentoxide layer, a silicon dioxide layer, and a zirconium dioxide layer.

17. The substrate according to any one of claims 8 to 16, wherein the curved substrate is curved glass and the decorative surface is an inner concave surface.

18. A cover plate, characterized in that the cover plate is manufactured by the method for manufacturing a substrate with a gradually-changing curved surface according to any one of claims 1 to 7 or the method for manufacturing a substrate with a gradually-changing curved surface according to any one of claims 8 to 17.

19. A device comprising the cover of claim 18, wherein the device is an electronic device or a battery.