阅读说明：本技术 膜层结构及膜层结构的制备方法、壳体及纹理模具 (Film structure, preparation method of film structure, shell and texture mold ) 是由 张博建 李维超 陈志斌 于 2019-10-28 设计创作，主要内容包括：本发明涉及一种膜层结构及膜层结构的制备方法、壳体及纹理模具。该膜层结构包括基底、纹理层及颜色层。纹理层具有多个连续并排排列的凸条,凸条的截面为多边形,凸条具有第一侧面、第二侧面及底面,凸条以底面与基底接触的方式设置,凸条的材料为透光材料；颜色层包括设于各凸条的第一侧面上的第一变色层和设于各凸条的第二侧面上的第二变色层,第一变色层的厚度和第二变色层的厚度不等,第一变色层及第二变色层呈渐变色。上述膜层结构的颜色随角度变化,且颜色能够更加丰富。(The invention relates to a film layer structure, a preparation method of the film layer structure, a shell and a texture mold. The film layer structure comprises a substrate, a texture layer and a color layer. The texture layer is provided with a plurality of convex strips which are continuously arranged side by side, the cross sections of the convex strips are polygonal, the convex strips are provided with a first side surface, a second side surface and a bottom surface, the convex strips are arranged in a mode that the bottom surfaces are in contact with the substrate, and the convex strips are made of light-transmitting materials; the color layer is including locating the first discoloration layer on the first side of each sand grip and locating the second discoloration layer on the second side of each sand grip, and the thickness on first discoloration layer and the thickness on second discoloration layer are not equal, and first discoloration layer and second discoloration layer are the gradual change look. The color of the film layer structure changes along with the angle, and the color can be richer.)

1. A film layer structure, comprising:

a substrate;

the texture layer is provided with a plurality of convex strips which are continuously arranged side by side, the cross sections of the convex strips are polygonal, the convex strips are provided with a first side surface, a second side surface and a bottom surface, the convex strips are arranged in a mode that the bottom surface is contacted with the substrate, and the convex strips are made of light-transmitting materials; and

the colour layer, the colour layer is including locating each first discoloration layer on the first side of sand grip and locating each second discoloration layer on the second side of sand grip, the thickness on first discoloration layer with the thickness inequality on second discoloration layer, first discoloration layer reaches second discoloration layer is the gradual change colour.

2. The film layer structure of claim 1, wherein an included angle formed by the first side surface and the bottom surface is not equal to an included angle formed by the second side surface and the bottom surface, and both are acute angles; and/or

The cross section of each convex strip is triangular; and/or

The color layer is prepared by a physical vapor deposition method; and/or

The first color changing layer and the second color changing layer are made of the same material; and/or

The texture layer is a UV texture layer.

3. The film structure of claim 1 or 2, wherein the material of the color layer is at least one selected from the group consisting of oxide, fluoride, nitride and metal.

4. The film structure of claim 3 wherein the oxide is selected from at least one of titanium oxide, indium oxide, niobium oxide, and chromium oxide; and/or

The fluoride is selected from at least one of magnesium fluoride and yttrium fluoride; and/or

The nitride is selected from at least one of aluminum nitride, silicon nitride, boron nitride and titanium nitride;

the metal is at least one selected from Ti, indium, gold, nickel and chromium.

5. The film layer structure of claim 1 or 2, wherein the first color altering layer has a thickness of 10nm to 1000 nm; and/or

The thickness of the second color changing layer is 10 nm-1000 nm; and/or

The distance from the intersection line of the first side surface and the second side surface to the bottom surface is 10-15 mu m.

6. The film layer structure of claim 1 or 2, wherein the substrate is made of a light-transmitting material, and the substrate is made of at least one material selected from PET, PC and PMMA.

7. The film structure of claim 1 or 2, further comprising a cover substrate layer, wherein the cover substrate layer is disposed on a side of the color layer away from the texture layer, and the cover substrate layer is made of a single color ink or a multi-color ink.

8. A housing comprising the film structure of any one of claims 1 to 7.

9. The preparation method of the membrane layer structure is characterized by comprising the following steps:

preparing a texture layer on a substrate by adopting a transfer printing process, wherein the texture layer is provided with a plurality of convex strips which are continuously arranged side by side, each convex strip is provided with a first side surface, a second side surface and a bottom surface, the convex strips are arranged in a manner that the bottom surfaces are contacted with the substrate, the cross sections of the convex strips are polygonal, and the raw materials of the convex strips are light-transmitting materials;

and depositing a first color changing layer on the first side surface of each convex strip and depositing a second color changing layer on the second side surface of each convex strip by adopting a physical vapor deposition method, wherein the thickness of the first color changing layer is not equal to that of the second color changing layer, and the first color changing layer and the second color changing layer are in gradient colors.

10. The method for preparing a film structure according to claim 9, wherein the transfer process is UV transfer; and/or

The physical vapor deposition method is a discontinuous film coating method.

11. The method for preparing a film structure according to claim 9 or 10, wherein the step of preparing the color layer on the texture layer is followed by a step of silk-screening a cover substrate on the color layer.

12. The utility model provides a texture mould, its characterized in that includes the body and sets up a plurality of many ribs of arranging side by side in succession on the body, many ribs have first face, second face and third face, many ribs with the mode setting of third face with the body contact.

13. The texture mold of claim 12, wherein the included angle formed by the first surface and the third surface is not equal to the included angle formed by the second surface and the third surface, and is an acute angle, and the distance from the intersection line of the first surface and the second surface to the third surface is 10 μm to 15 μm.

Technical Field

The invention relates to the technical field of electronic equipment, in particular to a film layer structure, a preparation method of the film layer structure, a shell and a texture mold.

Background

With the improvement of living standard of people, electronic products have become indispensable daily necessities. In recent years, electronic products having a graded housing have received consumer preference, particularly electronic products having a dynamic multi-color graded housing.

At present, a multicolor dynamic gradual change shell mainly adopts a spraying process, and the multicolor dynamic gradual change of the shell is mainly realized by the interference of optical color change ink. Chameleon ink is ink commonly used for preparing a multi-color dynamic gradual shell, and mainly comprises chameleon materials. The chameleon material has a chameleon physical structure, the inner core is mica with low optical refractive index, and the outer layer is coated with metal oxide with high refractive index, such as titanium dioxide or ferric oxide. The chameleon material shows the dynamic effect of changing color along with the angle through absorbing and emitting light.

Although the multi-color dynamic gradual shell prepared by the chameleon ink can realize dynamic gradual change of three primary colors, namely magic color, gold, red, purple, blue or green, the color change is limited, and richer colors cannot be presented.

Disclosure of Invention

In view of the above, there is a need for an angularly variable film structure that can exhibit a richer variety of colors.

In addition, a preparation method of the film layer structure changing color along with the angle, a shell and a texture mould for preparing the film layer structure are also provided.

A film layer structure comprising:

a substrate;

the texture layer is provided with a plurality of convex strips which are continuously arranged side by side, the cross sections of the convex strips are polygonal, the convex strips are provided with a first side surface, a second side surface and a bottom surface, the convex strips are arranged in a mode that the bottom surface is contacted with the substrate, and the convex strips are made of light-transmitting materials;

the colour layer, the colour layer is including locating each first discoloration layer on the first side of sand grip and locating each second discoloration layer on the second side of sand grip, the thickness on first discoloration layer with the thickness inequality on second discoloration layer, first discoloration layer reaches second discoloration layer is the gradual change colour.

The film layer structure comprises a substrate, a texture layer and a color layer, wherein the texture layer is provided with a plurality of convex strips which are continuously arranged side by side, the cross sections of the convex strips are polygonal, the convex strips are provided with a first side surface, a second side surface and a bottom surface, the bottom surfaces of the convex strips are arranged in a mode of contacting with the substrate, and the convex strips are made of light-transmitting materials; the colour layer is including locating the first discoloration layer on the first side of each sand grip and locating the second discoloration layer on the second side of each sand grip, and the thickness on first discoloration layer and the thickness inequality on second discoloration layer, first discoloration layer and second discoloration layer are the gradual change of colour. The color layer of the film layer structure is prepared by a physical vapor deposition method, is in gradient color, and can freely adjust color by controlling parameters such as target material, deposition thickness and the like, so that the color change is more abundant; and because the thickness of first discoloration layer and the thickness of second discoloration layer are unequal for along with the observation angle difference, the colour of the above-mentioned rete structure that observes is different, presents dynamic change, and along with the thickness difference of first discoloration layer and second discoloration layer is big more, and the effect of discolouring along with the angle is showing more.

In one embodiment, an included angle formed by the first side surface and the bottom surface is not equal to an included angle formed by the second side surface and the bottom surface, and both the included angles are acute angles.

In one embodiment, the cross section of the convex strip is triangular.

In one embodiment, the color layer is prepared by physical vapor deposition.

In one embodiment, the first color altering layer is the same material as the second color altering layer.

In one embodiment, the material of the color layer is at least one selected from the group consisting of an oxide, a fluoride, a nitride, and a metal.

In one embodiment, the oxide is selected from at least one of titanium oxide, indium oxide, niobium oxide, and chromium oxide; and/or

The fluoride is selected from at least one of magnesium fluoride and yttrium fluoride; and/or

The nitride is selected from at least one of aluminum nitride, silicon nitride, boron nitride and titanium nitride;

the metal is at least one selected from Ti, indium, gold, nickel and chromium.

In one embodiment, the texture layer is a UV texture layer.

In one embodiment, the thickness of the first color changing layer is 10nm to 1000 nm; and/or

The thickness of the second color changing layer is 10 nm-1000 nm; and/or

The distance from the intersection line of the first side surface and the second side surface to the bottom surface is 10-15 mu m.

In one embodiment, the material of the substrate is a light-transmitting material, and the material of the substrate is selected from at least one of PET, PC and PMMA.

In one embodiment, the film structure further comprises a cover bottom layer, the cover bottom layer is arranged on one side, away from the texture layer, of the color layer, and the raw material of the cover bottom layer is single-color ink or multi-color ink.

A shell, the above film layer structure.

A method of making a film layer structure comprising the steps of:

preparing a texture layer on a substrate by adopting a transfer printing process, wherein the texture layer is provided with a plurality of convex strips which are continuously arranged side by side, each convex strip is provided with a first side surface, a second side surface and a bottom surface, the convex strips are arranged in a manner that the bottom surfaces are contacted with the substrate, the cross sections of the convex strips are polygonal, and the raw materials of the convex strips are light-transmitting materials;

and depositing a first color changing layer on the first side surface of each convex strip and depositing a second color changing layer on the second side surface of each convex strip by adopting a physical vapor deposition method, wherein the thickness of the first color changing layer is not equal to that of the second color changing layer, and the first color changing layer and the second color changing layer are in gradient colors.

In one embodiment, the transfer process is UV transfer.

In one embodiment, the physical vapor deposition process is a discontinuous coating process.

In one embodiment, after the step of preparing the color layer on the texture layer, a step of silk-screening a bottom layer on the color layer is further included.

The utility model provides a texture mould, includes the body and sets up a plurality of many ribs of arranging side by side in succession on the body, many ribs have first face, second face and third face, many ribs with the mode setting of third face with the body contact.

In one embodiment, an included angle formed by the first surface and the third surface is not equal to an included angle formed by the second surface and the third surface, and the included angles are acute angles, and a distance from an intersection line of the first surface and the second surface to the third surface is 10-15 μm.

Drawings

FIG. 1 is a schematic diagram of a film structure according to an embodiment;

FIG. 2 is an enlarged view of portion A of the film layer structure shown in FIG. 1;

FIG. 3 is a schematic partial cross-sectional view of an embodiment of a housing.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Some embodiments of the invention are presented 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.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

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, an embodiment of the invention provides a film layer structure 100, and the film layer structure 100 can be applied to the preparation of electronic devices, such as the preparation of a mobile phone rear cover. The application of the film structure 100 is not limited to the preparation of electronic devices, and for example, the film structure can also be used as a peripheral product of electronic devices, such as the preparation of protective cases of mobile phones. The film structure 100 includes a substrate 110, a texture layer 120, a color layer 130, and a cover substrate 140 stacked on top of each other.

Base 110 serves as a carrier for texture layer 120, color layer 130, and cover underlayer 140. The material of the substrate 110 is a transparent material. Specifically, the material of the substrate 110 is selected from at least one of PET (Polyethylene terephthalate, abbreviated as PET), PC (Polycarbonate, abbreviated as PC), and PMMA (poly (methyl methacrylate), abbreviated as PMMA). Further, the material of the substrate 110 is PET. PET has good ductility and facilitates subsequent bonding to non-planar sheets (e.g., 3D glass).

In the present embodiment, the thickness of the substrate 110 is 50 μm. Of course, in other embodiments, the thickness of the substrate 110 may be designed according to actual requirements.

Referring to fig. 1 and 2, the texture layer 120 is disposed on the substrate 110, and the texture layer 120 is used to make the film structure 100 have different colors observed at different angles. In this embodiment, the texture layer 120 is a UV texture layer. That is, the texture layer 120 of the present embodiment is a texture prepared on a designed texture mold by using a photo-curing technique. It will be appreciated that the texture layer 120 is made of a light transmissive material, such as UV glue, to facilitate the passage of light. Further, the material of the texture layer 120 is a transparent material.

Specifically, the texture layer 120 has a plurality of ribs 121 arranged side by side in series. In the illustrated embodiment, the cross-section of the ribs 121 in a direction perpendicular to the base 110 is triangular. When the cross section of the protruding strips 121 is triangular, the discontinuous color change phenomenon can be avoided when observing the film structure 100. The protrusion 121 has a first side surface 123, a second side surface 124 and a bottom surface 125, and the bottom surface 125 of the protrusion 121 is disposed in contact with the substrate 110. The first side 123 and the second side 124 are adjacent to the bottom 125, respectively. In the present embodiment, the distance from the intersection of the first side surface 123 and the second side surface 124 to the bottom surface 125 (i.e., the thickness of the texture layer 120, denoted by h1) is 10 μm to 15 μm. Further, the distance from the intersection of the first side surface 123 and the second side surface 124 to the bottom surface 125 is 11 μm to 13 μm. Of course, in other embodiments, the distance from the intersection line of the first side surface 123 and the second side surface 124 to the bottom surface 125 may be designed according to actual requirements. The material of the convex strips 121 is a light-transmitting material. Further, the material of the protruding strips 121 is a transparent material.

The color layer 130 is disposed on the texture layer 120, and the color layer 130 is prepared by Physical Vapor Deposition (PVD). By controlling parameters such as the target material and the thickness of the deposited color layer 130, the color layer 130 can exhibit different colors under the reflection, refraction and interference of light.

Specifically, the color layer 130 includes a first coloring layer 131 disposed on the first side surface 123 of each convex strip 121 and a second coloring layer 133 disposed on the second side surface 124 of each convex strip 121. The thickness of the first coloration layer 131 is not equal to the thickness of the second coloration layer 133. Here, the thickness of the first discoloring layer 131 refers to its length in a direction perpendicular to the first side surface 123, and the thickness of the second discoloring layer 133 refers to its length in a direction perpendicular to the second side surface 124. Since the thicknesses of the first and second discoloring layers 131 and 133 are not equal, optical paths of light passing through the first discoloring layer 131 and light passing through the second discoloring layer 133 are different when viewed from different angles, and thus colors of the color layer 130 are different when viewed from different angles. Thereby enabling the film structure 100 to exhibit dynamic color change effect.

It is understood that, in other embodiments, the cross-section of the protruding strips 121 along the direction perpendicular to the substrate 110 is not limited to a triangle, but may be other polygons, such as a triangle, a quadrangle, a pentagon, etc., as long as the thickness of the first color-changing layer 131 disposed on the first side 123 and the thickness of the second color-changing layer 133 disposed on the second side 124 are not equal.

In the present embodiment, the thickness of the first coloring layer 131 (d1) is 10nm to 1000nm, the thickness of the second coloring layer 133 (d2) is 10nm to 1000nm, and the values of d1 and d2 are different. Further, the thickness d1 of the first coloration layer 131 is 50nm to 400nm, and the thickness d2 of the second coloration layer 133 is 50nm to 400 nm. In the illustrated embodiment, d1 is 315nm and d2 is 147 nm.

Further, the height of the first coloration layer 131 in the direction perpendicular to the substrate 110 (denoted as h2) is equal to the height of the second coloration layer 133 in the direction perpendicular to the substrate 110 (denoted as h 3). The angle formed by the first side surface 123 and the bottom surface 125 (or the first side surface 123 and the substrate 110) is denoted as α, the angle formed by the second side surface 124 and the bottom surface 125 (or the second side surface 124 and the substrate 110) is denoted as β, α is not equal to β, and α and β are both acute angles, it is known from geometric knowledge that the thicknesses of the first color-changing layer 131 and the second color-changing layer 133 are not equal when the height of the first color-changing layer 131 in the direction perpendicular to the substrate 110 is equal to the height of the second color-changing layer 133 in the direction perpendicular to the substrate 110, α is not equal to β, and α and β are both acute angles.

Of course, in some embodiments, α and β can be adjusted according to actual requirements. As long as α and β are acute angles and are not equal, the thicknesses of the first discoloring layer 131 and the second discoloring layer 133 may be different. Of course, the greater the difference between α and β, the greater the difference in thickness between the first coloring layer 131 and the second coloring layer 133, and the more significant the effect of the color change with angle. In one embodiment, the difference between α and β is between 10 ° and 80 °. The thickness difference between the first color-changing layer 131 and the second color-changing layer 133 is 10nm to 300 nm. In the illustrated embodiment, α is 65 ° and β is 26 °. Of course, in other embodiments, the difference between α and β is not limited to 10 ° to 80 °, the difference between the thicknesses of the first and second discoloring layers 131 and 133 is not limited to 10nm to 300nm, and the difference between α and β and the difference between the thicknesses of the first and second discoloring layers 131 and 133 may be adjusted according to the effect to be achieved.

The color layer 130 is a film layer having a color. The material of the color layer 130 includes at least one of oxide, fluoride, nitride, and metal. Further, the material of the color layer 130 is selected from at least one of titanium oxide, indium oxide, niobium oxide, and chromium oxide. Such as titanium dioxide, indium oxide, niobium pentoxide, chromium oxide, and the like. The material of the color layer 130 is selected from at least one of magnesium fluoride and yttrium fluoride. The material of the color layer 130 is selected from at least one of aluminum nitride, silicon nitride, boron nitride, and titanium nitride. The material of the color layer 130 is at least one selected from Ti, indium, gold, nickel, and chromium. In one embodiment, the material of the color layer 130 further includes silicon dioxide. Silica is used as a filler.

It is understood that the color layer 130 may have a single-layer structure or a multi-layer structure. The single-layer structure means that the color layer 130 is a film layer composed of only one or more substances, such as a Ti layer or a mixed layer of Ti and Si. The multilayer structure refers to a multi-layered structure in which the color layer 130 is formed of a plurality of substances, for example, a Ti layer, a Si layer, and a Ti layer, which are sequentially layered. Of course, the thickness of each layer can be designed according to actual requirements.

In the present embodiment, the first color-changing layer 131 and the second color-changing layer 133 are made of the same material. The height of the first coloration layer 131 in the direction perpendicular to the substrate 110 and the height of the second coloration layer 133 in the direction perpendicular to the substrate 110 are equal. Specifically, when the color layer 130 has a single-layered structure, the first and second color-changing layers 131 and 133 are made of the same material and have the same height in a direction perpendicular to the bottom surface 125. When the color layer 130 has a multi-layer structure, the first color-changing layer 131 and the second color-changing layer 133 have the same number of layers, each layer has the same material, and the heights of the layers in the direction perpendicular to the bottom surface 125 are correspondingly the same.

In this embodiment, the film structure 100 can realize dynamic gradual change and rich color mainly because the first side surface 123 and the second side surface 124 form different included angles with the bottom surface 125 (or the first side surface 123 and the second side surface 124 form different included angles with the substrate 110), so that the thickness of the first color-changing layer 131 is different from the thickness of the second color-changing layer 133, the color layer 130 is prepared by a physical vapor deposition method, and by adjusting the thicknesses of the target and the color layer 130, the color-changing range of the color layer 130 can be larger, and the color can be richer. Therefore, the film layer structure 100 of the present embodiment can realize free color matching by determining the angles formed by the first and second side surfaces 123 and 124 and the bottom surface 125, the thicknesses of the first and second color-changing layers 131 and 133, and the materials of the first and second color-changing layers 131 and 133 according to the desired color-changing effect.

The cover bottom layer 140 is disposed on a side of the color layer 130 away from the texture layer 120. The cap underlayer 140 serves as a substrate for the film layer structure 100. The material of the cover bottom layer 140 is a single color ink or a multi-color ink. Generally, when the color of the color layer 130 is light, the material of the cap bottom layer 140 is white ink. When the color layer 130 is dark, the material of the cover bottom layer 140 is black ink. Of course, to achieve a richer color, the color of the cover bottom layer 140 may also be selected from a multi-color ink. The thickness of the cover bottom layer 140 can be designed according to actual requirements. It should be noted that the thickness of the cover substrate 140 herein refers to the distance from the midpoint of the thickness of the texture layer 120 to the side of the cover substrate 140 away from the color layer 130. In the illustrated embodiment, the lid bottom layer 140 has a thickness d 3.

Of course, in some embodiments, the film structure 100 further includes an adhesive layer and a protective layer. The adhesive layer is disposed on the side of the substrate 110 away from the texture layer 120, and the protective layer is disposed on the side of the adhesive layer 200 away from the substrate 110. The adhesive layer is used for adhering the substrate 110 to the plate; the protective layer is used to protect the adhesive layer. When in use, the protective layer is peeled off to expose the adhesive layer.

The film structure 100 can change color with angle and can present more abundant color.

Referring to fig. 3, an embodiment of the invention further provides a housing 10, where the housing 10 includes the film structure 100.

Specifically, the housing 10 further includes an adhesive layer 200 and a plate 300. The sheet 300, the adhesive layer 200, and the film layer structure 100 are sequentially stacked.

The adhesive layer 200 is located on the side of the substrate 110 away from the texture layer 120 and is used for bonding the substrate 110 and the plate 300. In this embodiment, the material of the adhesive layer 200 is OCA glue. The thickness of the adhesive layer 200 is 15 μm to 30 μm. Of course, in other embodiments, the material of the adhesive layer 200 may be other materials commonly used in the art for adhering the substrate 110 and the plate 300, and the thickness of the adhesive layer 200 may be designed according to actual requirements.

Sheet material 300 is disposed on a side of adhesive layer 200 remote from substrate 110. The sheet 300 serves as a carrier for the membrane layer structure 100. The material of the plate 300 is a light-transmitting material. Further, the material of the plate 300 is a transparent material. In the present embodiment, the material of the plate material 300 is glass, for example, 3D glass. Of course, in other embodiments, the material of the plate 300 may also be other light-transmitting materials, such as PC, PMMA, etc.

The housing 10 includes the film structure 100, and has a rich color and a dynamic gradual change effect.

An embodiment of the present invention further provides a method for preparing any one of the above film structures, including steps S110 to S130. Specifically, the method comprises the following steps:

step S110, a texture layer 120 is formed on the substrate 110 by using a transfer process.

Specifically, the step of forming the texture layer 120 on the substrate 110 using the transfer process includes S111 to S112.

Step S111, providing a substrate 110.

In this embodiment, the substrate 110 is a PET film sheet. Of course, in other embodiments, the substrate 110 may also be a PC film, a PMMA film, or the like. The material of the substrate 110 may be a transparent material.

Step S112, forming a texture layer 120 on the substrate 110.

In the present embodiment, the texture layer 120 is prepared by a UV transfer process. Specifically, the step of preparing the texture layer 120 on the substrate 110 includes making a texture mold, transferring, pressing, photocuring, and demolding. Further, a texture mold is manufactured according to the texture of the texture layer 120 to be prepared; then injecting the UV glue into the texture mold, and leveling the UV glue; then, rolling and jointing the substrate 110 with the surface impurities removed completely with the glue injection part of the texture mold; and then polymerizing and curing the UV glue in the texture mold by using a UV curing machine to form the UV texture with the required shape, and finally demolding to obtain the texture layer 120.

In one embodiment, the texture mold comprises a body and a plurality of continuous multi-edge strips arranged side by side on the body. In the present embodiment, the number of the ribs is three, that is, the ribs are triangular ribs. The three-edged strip is provided with a first surface, a second surface and a third surface, and the three-edged strip is arranged in a mode that the third surface is contacted with the body. The included angle that first face and third face formed and the included angle that second face and third face formed are the inequality, and are the acute angle. Further, the difference value between the included angle formed by the first surface and the third surface and the included angle formed by the second surface and the third surface is 10-80 degrees. The distance from the intersection line of the first surface and the second surface to the third surface (namely the thickness of the triangular prism) is 10-15 μm. Further, the distance from the intersection line of the first surface and the second surface to the third surface is 11-13 μm. Of course, in other embodiments, the distance from the intersection line of the first surface and the second surface to the third surface, and the difference between the included angle formed by the first surface and the third surface and the included angle formed by the second surface and the third surface may be designed according to the texture layer 120 to be prepared. In other embodiments, the number of the ribs of the multi-rib bar may be any other integer greater than three, and may be adjusted according to the cross-sectional pattern of the texture layer 120 to be prepared.

In the UV transfer process, the grooves formed between two adjacent three ridges correspond to the convex strips 121 of the texture layer 120. Accordingly, the texture layer 120 prepared by the UV transfer process has a plurality of protrusions 121 arranged side by side in series, each protrusion 121 has a first side 123, a second side 124, and a bottom 125, each protrusion 121 is disposed in such a manner that the bottom 125 contacts the substrate 110, and an included angle formed by the first side 123 and the bottom 125 is not equal to an included angle formed by the second side 124 and the bottom 125, and is an acute angle. The cross section of the protruding strips 121 in the direction perpendicular to the substrate 110 is triangular, and the material of the protruding strips 121 is a light-transmitting material.

In this embodiment, the UV glue is a UV glue commonly used in the art. The components of the UV glue comprise a prepolymer and a photoinitiator. Further, the prepolymer includes epoxy acrylate, urethane acrylate, polyether acrylate, polyester acrylate, acrylic resin, and the like.

Step S120, forming a color layer 130 on the texture layer 120.

The color layer 130 is prepared by Physical Vapor Deposition (PVD). Further, the color layer 130 is prepared by a vacuum evaporation method. Vacuum evaporation, abbreviated as evaporation, refers to a process method in which a coating material (or called a coating material) is evaporated and gasified in a certain heating and evaporation manner under a vacuum condition, and particles fly to the surface of a substrate to condense and form a film. The vapor deposition is a vapor deposition technology which is used earlier and has wider application, and has the advantages of simple film forming method, high film purity and compactness, unique film structure and performance and the like.

In the present embodiment, the color layer 130 is prepared by a discontinuous vacuum metallization (NCVM) technique. NCVM, also known as non-conductive plating technology, is a high and new technology arising from common vacuum plating. The NCVM means that a metal material is converted into particles by specific means such as chemistry and physics under a vacuum condition, and the particles are deposited or adsorbed on the surface of a material such as plastic/glass to form a film, that is, a coating film.

Further, a first discoloring layer 131 and a first discoloring layer 131 are simultaneously formed on the texture layer 120 using a discontinuous plating technique. Since the simultaneous evaporation has a characteristic that the thicknesses of the film layers deposited in the same evaporation direction are the same, the height of the first coloration layer 131 in the direction perpendicular to the substrate 110 and the height of the second coloration layer 133 in the direction perpendicular to the substrate 110 are equal. Since the cross section of the protruding strips 121 in the direction perpendicular to the substrate 110 is triangular, α is not equal to β, and α is an acute angle, the thickness of the first color-changing layer 131 deposited by simultaneous vapor deposition on the texture layer 120 is not equal to the thickness of the second color-changing layer 133 deposited.

The target material for vacuum evaporation is a target material with color after evaporation. Such as oxide targets, fluoride targets, nitride targets, and metal targets.

Step S130, a bottom layer 140 is silk-screened on the color layer 130.

Specifically, a method of screen printing the cap base layer 140 on the color layer 130 is not particularly limited, and a method commonly used in the art may be used. Further, the ink of the silk-screen bottom layer 140 is a single color ink or a multi-color ink. Whether a single color ink or a multi-color ink is selected depends on the actual requirements.

The preparation method of the film structure 100 is simple and convenient, and is beneficial to large-scale production. Compared with the traditional method for preparing the color layer by adopting a spraying process, the method for preparing the film layer structure 100 has the advantages that the color layer 130 is prepared by PVD, so that the prepared film layer structure 100 has rich colors; and the thickness of the color layer 130 formed by PVD is nano-scale, so that the formed film structure 100 has the characteristics of fine appearance texture, small overall granularity, light and shadow effect, and the like.

An embodiment of the present invention further provides a method for manufacturing any of the above cases, wherein the method for manufacturing includes a step of attaching the sheet 300 to the film structure 100.

Specifically, the sheet material 300 is attached to the side of the substrate 110 away from the texture layer 120. The method for attaching the panel 300 to the side of the substrate 110 away from the texture layer 120 is not particularly limited, and may be a method commonly used in the art. For example, OCA glue is used to attach the panel 300 to the side of the substrate 110 away from the texture layer 120.

In the present embodiment, the material of the plate material 300 is glass, for example, 3D glass. Of course, in other embodiments, the material of the plate 300 may also be other light-transmitting materials, such as PC, PMMA, etc.

The preparation method of the shell is simple and convenient, and is beneficial to large-scale production.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The following detailed description is given with reference to specific examples. The examples, which are not specifically illustrated, employ drugs and equipment, all of which are conventional in the art. The experimental procedures, in which specific conditions are not indicated in the examples, were carried out according to conventional conditions, such as those described in the literature, in books, or as recommended by the manufacturer.

Example 1

The structure of the case of example 1 is shown in fig. 3. The case of embodiment 1 includes a plate adhesive layer, a base, a texture layer, a color layer, and a cover bottom layer, which are sequentially stacked. The plate is 3D glass; the raw material of the bonding layer is OCA glue; the substrate is a PET film with the thickness of 0.50 mm. The raw materials of the texture layer comprise UV glue H16 (health-care chemical technology, Inc. of Dongguan), the cross section of the convex strip of the texture layer in the direction vertical to the substrate is triangular, the distance from the intersection line of the first side surface and the second side surface of the convex strip to the substrate is 12 mu m, and the included angle (alpha) between the first side surface and the bottom surface and the included angle (beta) between the second side surface and the bottom surface are 65 degrees and 26 degrees respectively. The color layer is three layers, specifically a Ti layer, a Si layer and a Ti layer which are sequentially stacked, the thickness of the color layer in the direction vertical to the substrate is 350nm (namely the height (h2) of the first color changing layer in the direction vertical to the substrate and the height (h3) of the second color changing layer in the direction vertical to the substrate are both 350nm), and the thicknesses of the Ti layer, the Si layer and the Ti layer in the direction vertical to the substrate are 150nm, 50nm and 150nm respectively. The thickness of the first coloration layer (d1) was 315nm and the thickness of the second coloration layer (d2) was 147 nm. The ink of the cover and bottom layers was black ink, and the thickness of the cover and bottom layers (d3) was 36 μm. The shell of example 1 appears to have a gradual effect from blue to violet from a different perspective.

The specific preparation steps of the housing of example 1 are as follows:

(1) UV textures are manufactured on the PET film through a designed texture mold: firstly, manufacturing a texture mould comprising a body and a plurality of continuous triangular ribs arranged side by side on the body; the triangular rib is provided with a first surface, a second surface and a third surface, the triangular rib is arranged in a mode that the third surface is in contact with the body, an included angle formed by the first surface and the third surface is 65 degrees, an included angle formed by the second surface and the third surface is 26 degrees, and the distance from the intersection line of the first surface and the second surface to the third surface (namely the thickness of the triangular rib) is 12 microns. Then injecting UV glue H16 into the texture mold, and leveling the texture mold; then rolling and attaching the PET film with the surface impurities removed completely to the glue injection part of the texture mold; and then polymerizing and curing the UV glue in the texture mould by using a UV curing machine to form the texture, and finally demoulding to obtain the texture layer.

(2) Preparing a color layer on the texture layer prepared in the step (1) by adopting a discontinuous coating technology (NCVM): placing the texture layer prepared in the step (1) in a film coating machine, and carrying out vacuum (air pressure 10)^-5Torr) was used, a Ti layer having a thickness of 150nm (the length of the Ti layer in the direction perpendicular to the substrate) was formed on the texture layer by vapor deposition for 7min using a Ti target; then, the mixture is subjected to vacuum (air pressure 10)^-5Torr) was used to deposit a Si target for 6min to form a thickness (the thickness is such that the Si layer is perpendicular to the Ti layer) on the Ti layerLength in the substrate direction) of 50 nm. Finally, in vacuum (pressure 10)^-5Torr) was used, and a Ti layer having a thickness of 150nm (the thickness is the length of the Ti layer in the direction perpendicular to the substrate) was formed on the Si layer by vapor deposition for 6min using a Ti target.

(3) Silk-screen printing the bottom layer on the color layer obtained in the step (2) to obtain a film layer structure: and (4) carrying out silk-screen printing on the black bottom-covering ink for three times to obtain a bottom-covering layer. The thickness of the cap and base layers was 36 μm.

(4) And (4) radium-cutting the film layer structure obtained in the step (3) into a size matched with the plate, and then attaching the plate to one side, far away from the texture layer, of the substrate by using OCA glue to obtain the shell of the embodiment 1.

Example 2

The structure of the case of embodiment 2 is substantially the same as that of embodiment 1. The difference is that the distance from the intersection line of the first side surface and the second side surface of the ridge of example 2 to the bottom surface was 12 μm, and the angle (α) between the first side surface and the bottom surface and the angle (β) between the second side surface and the bottom surface were 35 ° and 55 °, respectively. The height of the color layer of example 2 in the direction perpendicular to the base was 230nm (i.e., the thickness of the first discoloring layer in the direction perpendicular to the bottom surface (h2) and the height of the second discoloring layer in the direction perpendicular to the base (h3) were both 230nm), and the heights of the Ti layer, the Si layer, and the Ti layer in the direction perpendicular to the bottom surface were 140nm, 60nm, and 30nm, respectively. The thickness of the first coloration layer (d1) of example 2 was 60nm, and the thickness of the second coloration layer (d2) was 30 nm. The thickness of the cap and base layer of example 2 was (d3)36 μm. Wherein, according to the direction of keeping away from the colour layer, the lid bottom layer is white printing ink layer and black printing ink layer in proper order, and the thickness of white printing ink layer is 24 mu m. From a different perspective, the case of example 2 exhibited a gradation effect of pink-deep yellow-pale yellow.

The specific manufacturing steps of the case of example 2 are substantially the same as example 1, except that the texture mold of example 2 has a first face forming an angle of 35 ° with the third face and a second face forming an angle of 55 ° with the third face. In example 2, the time for vacuum deposition of the Ti layer, the Si layer, and the Ti layer was 7min, and 2min, respectively. And (3) when the bottom layer of the cover is subjected to silk-screen printing, firstly, carrying out silk-screen printing on the white ink twice, and then, carrying out silk-screen printing on the black ink.

Comparative example 1

The case of comparative example 1 has substantially the same structure as example 2, except that the cross section of the ridges of the grain layer of comparative example 1 is semicircular, and the radius of the white circular ridges is 12 μm. The material of the undercoat layer of comparative example 1 was black ink, and the thickness (d3) of the undercoat layer was 36 μm. The case of comparative example 1 was blue, but the color did not change when viewed from various angles.

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.