CN111016522B

CN111016522B - Decorative membrane, mold, preparation method of decorative membrane and electronic equipment cover plate

Info

Publication number: CN111016522B
Application number: CN201911386981.7A
Authority: CN
Inventors: 杨广舟; 肖超; 李方彬; 亢红伟
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2019-12-29
Filing date: 2019-12-29
Publication date: 2021-10-29
Anticipated expiration: 2039-12-29
Also published as: CN111016522A

Abstract

The application provides a decorative membrane, a mold, a preparation method of the decorative membrane and an electronic equipment cover plate. The decorative film is provided with a texture layer, the texture layer is provided with texture patterns of a convex structure and/or a concave structure, the texture patterns comprise a plurality of strip-shaped textures which are arranged in a crossed mode, the height or the depth of at least one texture is arranged along the extending direction in a changing mode, and the strip-shaped textures are in a linear shape, a curved shape or a broken line shape. The texture layer of this decoration diaphragm has the little nano-structure that curve intersection, depth change combined together like this, and different visual angles see the change that presents different light and shadow, and the optical effect twists reverse along with the summit of curve, and light and shade are alternative along with the texture degree of depth change, and then makes decorative effect dazzle cool, improves user's visual experience.

Description

Decorative membrane, mold, preparation method of decorative membrane and electronic equipment cover plate

Technical Field

The invention relates to a decorative membrane, in particular to a decorative membrane with curved textures, a mold and a preparation method thereof, and an electronic equipment cover plate.

Background

With the improvement of the living standard, besides the portable intelligent devices such as mobile phones and PADs, the appearance requirements of users are higher and higher, and therefore, in order to attract customers, the development of appearance is increased by merchants, and the merchants hope to design distinctive products. Taking a mobile phone as an example, the mobile phone cover plate not only plays a role in protecting parts inside the mobile phone, but also plays a role in beautifying and decorating, and the design of the mobile phone cover plate with excellent decoration effect can not only increase the value of the mobile phone, but also improve the use experience of users, and increase the selection range of the users for the appearance of the mobile phone, so that the mobile phone is popular with more users. However, the current decoration design of the mobile phone cover plate focuses on the replacement of materials (such as glass, metal, plastic) or the replacement of a single color of a color layer, which results in a single vision and an insufficient vivid picture, thereby causing a poor decoration effect.

Therefore, there is a need in the art for a new decorative film.

Disclosure of Invention

The embodiment of the invention aims to: the novel decorative film is provided with a micro-nano structure with curve cross depth change, and the change of different light and shadow can be seen from different visual angles, so that the decorative effect is realized.

In order to achieve the purpose, the technical scheme adopted by the application is as follows,

the decorative film is characterized by comprising a texture layer, wherein the texture layer is provided with a texture pattern with a convex structure and/or a concave structure, the texture pattern comprises a plurality of strip-shaped textures which are arranged in a crossed mode, the height or the depth of at least one texture is arranged along the extending direction in a changing mode, and the strip-shaped textures are in a linear shape, a curve shape or a broken line shape. The texture layer is provided with a micro-nano structure with curve cross depth change, so that the change of different light and shadow can be seen from different visual angles, and the light and the shade are alternated along with the change of the depth of the texture. Carry on its electronic equipment apron and then have good decorative effect.

Preferably, the two textures at the intersection of the decorative film are arranged to overlap each other, or one texture is continuously arranged and the other texture is intermittently arranged.

Preferably, the striped texture comprises cylindrical lenses which are sinusoidal, cosine curved or irregular curved.

Preferably, at the edge of the decorative film, the height or depth of the convex structure and/or the concave structure is 0 or close to 0.

Preferably, the height or depth of the raised structures and/or recessed structures in the thickness direction gradually increases or gradually decreases or alternately increases and decreases.

Preferably, the stripe-like texture is linear, curved or broken.

Preferably, the texture pattern further comprises a plurality of dots disposed on or near the stripe-like texture.

Preferably, each of the textures has at least one of different parameters of amplitude, curvature, width, angle, radian, width and length.

The embodiment of the present application further provides a mold, which includes a molding surface, wherein the molding surface includes a target texture pattern matching the texture pattern, and the target texture pattern is a convex structure and/or a concave structure, and is used for molding the texture pattern.

The embodiment of the application also discloses a preparation method of the mold, which comprises the following steps:

s1, moving along vector directions of an X axis and a Y axis on a plane of a base layer based on a cutter, and simultaneously making depth change in a Z axis direction;

and S2, after one curve is moved, the next curve is processed, and then the other curve crossed with the next curve is processed to form a curve array so as to form a grid-shaped texture pattern.

Preferably, the preparation method is characterized in that the cutter moves on the Z axis based on a fast cutter servo mode when moving to form a curve with depth change.

Preferably, the curve is replaced by a straight line or a broken line.

Preferably, the tool, when moved to the intersection, cuts fully or partially or bypasses the curve intersecting it.

The embodiment of the application also provides an electronic equipment cover plate which carries the decorative film.

Advantageous effects

According to the decorative membrane, the texture layer is provided with a micro-nano structure with curve intersection depth change, so that the change of different light and shadow can be seen from different visual angles, if the texture is in a gully shape, the optical effect is twisted along with the vertex of the curve, and the light and the shade are alternated along with the change of the depth of the texture. Carry on its electronic equipment apron and then have good decorative effect.

Drawings

In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the specification, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise:

FIG. 1 is a schematic structural view illustrating the texture of a decorative film according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view illustrating the texture of a decorative film according to an embodiment of the present disclosure;

fig. 3 and 3a are schematic structural diagrams illustrating textures of the decorative film according to the embodiment of the application;

FIG. 4 is a schematic cross-sectional view of a decorative film according to an embodiment of the present disclosure;

fig. 5 is a schematic cross-sectional view illustrating a textured surface to be processed according to an embodiment of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions proposed by the present invention, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only a part of the embodiments in the present specification, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from one or more of the embodiments described herein without making any inventive step, shall fall within the scope of protection of the present invention.

The application provides a decorate diaphragm, it contains the texture layer, and it has the texture pattern (also called little nanostructure) of protruding structure and/or sunk structure, and this texture pattern contains the plural strip texture of cross arrangement, and wherein at least one the height or the degree of depth of texture change along the extending direction and set up, strip texture is straight line, curved line or broken line shape. The optical effect is twisted along with the vertex of the curve, and the light and the shade are alternated along with the change of the texture depth, so that the decorative film visually presents the change of different light shadows from different visual angles. The decorative effect is increased, the decorative vision is rich, and the picture is vivid.

The decorative film proposed by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, a decorative film 100 according to an embodiment of the present invention includes a texture layer 101 having curved micro-nano structures therein, which have raised structures and/or recessed structures (not shown). The optical effect of the design is twisted along with the vertex of the curve, and the light and the shade are alternated along with the change of the depth of the texture, so that the decorative film visually presents the change of different light shadows from different visual angles, and the decorative effect is very cool.

As a variation of the embodiment shown in fig. 1, as shown in fig. 2, the decorative film 200 includes a texture layer having three texture patterns, a first texture 201, a second texture 202, and a third texture 203, which are respectively curved, and the three texture patterns respectively have a convex structure and/or a concave structure (not shown). The design shows different light and shadow changes at different visual angles. The processing plane can be sequentially carved on the processing plane or stamped by a mould during manufacturing. Preferably, the height or depth of the texture of at least one of the first texture 201, the second texture 202 and the third texture 203 is set to vary along the extending direction.

As a variation of the embodiment of fig. 1, as shown in fig. 3, the decorative film 300 includes a texture layer having a curved texture pattern 301 therein. Preferably, the curved texture conforms to a certain function model, such as a shape distribution according to a sine function or a cosine function, or a combination of sine and cosine. The grain pattern has convex structures and/or concave structures (not shown), and the cross-sectional shape of the grain pattern is circular arc, rectangular, triangular, or arcuate. The design shows different light and shadow changes at different visual angles. Thereby making the decorative effect cool. Preferably, the height or depth of the curved texture 301 varies along the extending direction. As a variation of the embodiment of fig. 3a, the decorative film 500 comprises a texture layer having a curved texture pattern 501 therein, and a plurality of dots 502, wherein the dots 502 may be located on or near the curve. Preferably, the dots are also concentric circles, thus being visually radial.

The decorative film of the present application further comprises a carrier layer as shown in fig. 4, the decorative film 400 having a texture layer 401 laminated on a carrier layer 402. The material of the bearing layer is consistent with that of the curved texture or is selected from one or a combination of PET material, PC material, PMMA material and PC composite material, preferably, the micro-nano structure is arranged at one side of the bearing layer in a gully shape, when the bearing layer is a colored bearing layer and is PET, PMMA, glass, PC or composite board and the like, light curing glue or heat curing glue is arranged at one side of the colored bearing layer, texture patterns are arranged at one side far away from the colored bearing layer, and the light curing glue or the heat curing glue can also be colored; or a colored film is arranged on the transparent object color substrate to form a colored bearing layer, the transparent colorless substrate can be PET, PMMA, glass, PC or a composite board and the like, light curing glue or heat curing glue is arranged on one side of the colored bearing layer, a texture pattern is arranged on one side far away from the colored bearing layer, and the light curing glue or the heat curing glue can also be colored; or the colored bearing layer is thermal curing glue or light curing glue, and then a pattern structure is formed on the thermal curing glue or the light curing glue; the above-described structure on a colored carrier layer is suitable when the carrier layer is colorless.

The decorative film can also comprise a reflecting layer covered on the texture layer and a coloring layer arranged on the reflecting layer. The reflecting layer is used for enhancing the optical effect and can also provide colors for the decorative film; the colored layer is generally a priming ink layer for priming and color development of the auxiliary reflective layer.

In one embodiment, the curved grain pattern is in a grid shape. Or the depth in the thickness direction changes, so that the optical effect is twisted along with the vertex of the curve, and the light and the shade alternate along with the depth change of the texture, thereby having good decorative effect.

In one embodiment, the texture pattern comprises at least one of a curve, a straight line, a broken line, or a combination thereof.

In one embodiment, the texture pattern comprises a combination of light and shadow stripes and a dot matrix.

The present application provides a mold for forming the above-mentioned texture layer, comprising a surface for forming at least one texture pattern of a convex structure or a concave structure, wherein the at least one texture pattern comprises at least one sub-texture pattern unit in a curved array. In a specific implementation, a microstructure design may be performed in advance, and referring to fig. 5, on a to-be-processed surface 10 of a mold, a tool moves on a processing plane along a vector direction of an X, Y axis, and depth changes (a groove depth h1 side is deeper than a groove depth h2 side) in a Fast Tool Servo (FTS) manner in a Z axis direction while moving, so as to process a curve. In a preparation method, S1, a cutter moves on a plane (to-be-processed surface) of a base layer along vector directions of an X axis and a Y axis, and depth changes are made in the Z axis direction; and S2, after one curve is moved, the next curve is processed, and then the other curve crossed with the next curve is processed to form a curve array so as to form a grid-shaped texture pattern. Preferably, the tool moves on the Z axis based on a fast tool servo mode to form a curve with depth change. Preferably, the tool, when moved to the intersection, cuts fully or partially or bypasses the curve intersecting it. Preferably, the curve can be replaced by a straight line or a broken line.

The UV texture is processed on the die and can be formed by a plurality of target curves, the line width of each target curve is changed in a width staggered mode, each better curve can be arranged oppositely by adopting different radians, and a plurality of wave crests can be formed by arranging the target curves. Or each curve may be arranged in an intersecting, overlapping, etc. manner. The cross section of the material is arc-shaped, rectangular, triangular or arched. The mold thus processed is used to form a target texture pattern matching the shape thereof. For example, a predetermined UV paste is coated on the substrate and then imprinted by the mold. In other embodiments, the substrate may be coated with a predetermined UV paste and then cured, and the texture pattern having a curved line array, which may include a plurality of patterns, may be engraved on the processing surface by a multi-axis processing apparatus at a later stage.

In the method for making the texture (refer to fig. 5), the tool 10 moves along the vector direction of X, Y axis on the processing plane, the height (depth variation) of the tool is adjusted along the Z axis direction while moving, after a curve is run (the groove depth of the curve may be inconsistent), the next curve is shifted to a certain direction (a certain distance or angle is shifted) to continue processing, preferably a curve array is formed in a preset area on the processing plane, and preferably, the curve array is processed into an arbitrary curve crossed with the curve array, and the curve moves along the vector directions of X and Y while passing through the height (depth variation) of the tool along the Z axis direction. This produces an array of intersecting curves. The manufacturing method comprises the steps of utilizing multi-axis processing equipment to perform curve movement (to carve curve patterns) on the processing surface of a die or the processing surface of a solidified UV texture layer in the horizontal direction by utilizing a processing cutter, and continuing to perform curve movement in the horizontal direction after a preset distance or angle is offset after one-time curve movement is completed. Preferably, the working surface is moved up/down in the vertical direction while moving in a curve in the horizontal direction, so that the working (engraving) line is curved or the line is crossed while the depth is varied. The width of the groove is gradually increased or gradually decreased or the period of the groove is increased and decreased.

In one embodiment, the micro-nano structure may be one or a combination of a curved cylindrical mirror and a wiredrawing; the cross section of the micro-nano structure is arc, trapezoid, triangle, quadrangle, and at least one side is arc or polygon. This dimension receives structure can be by the mould rendition, during the rendition, pack into the mould UV transfer machine dull and stereotyped in, fixed level and smooth, inject the UV glue that texture layer corresponds into in to the mould, with the substrate on the mould, make UV glue and substrate laminating with the help of compression roller suppression, through ultraviolet curing, accomplish UV texture rendition promptly. Or by engraving on the working surface with a working device. Preferably, the micro-nano structure is filled with pigment (or photochromic pigment), so that the decorative membrane has gorgeous and changeable color, vivid picture and good aesthetic degree.

In the design of the texture layer, the texture layer is provided with a texture pattern of a convex structure and/or a concave structure, the texture pattern comprises a plurality of (strip-shaped) textures which are arranged in a crossed mode, wherein the height or the depth of at least one texture is arranged along the extending direction in a changing mode, and the (strip-shaped) textures are in a straight line shape, a curve shape or a broken line shape. Preferably, two textures at the intersection are arranged to overlap each other, or one texture is arranged continuously and the other texture is arranged intermittently. The optical effect is twisted along with the intersection point of the curve, and the light and the shade are alternated along with the change of the depth of the texture, so that the decorative effect is good.

In the design of the texture layer, the texture is in a gully shape, the texture optical effect is twisted along with the vertex of the curve, and the light and the shade are alternated along with the change of the depth of the texture, so that the texture layer has a good decorative effect. Preferably, the curve is a continuous curve. Or no curve in a local area is discontinuous. Preferably, the ratio of the coverage area of the curve pattern to the area of the decorative membrane carrying the curve pattern is more than 80%, so that the decorative membrane does not have too much blank visually, and the decorative membrane has gorgeous and varied colors, vivid pictures and good attractiveness.

In the design of the texture layer, the texture pattern of the texture layer is a continuous target curve or a plurality of target curves, the width/width of the groove (line) of the target curve and the depth are changed in a staggered mode, and the plurality of target curves are arranged in different radians (curvatures) or in a crossed mode to form a curve array. Therefore, the optical effect is twisted along with the vertex of the curve in vision, and the light and the shade are alternated along with the change of the depth of the texture, so that the decorative effect is good.

In the design of the texture layer, it includes a plurality of curved cylindrical lenses. The curved cylindrical lens is a sine curve, a cosine curve or other irregular curves. The curve may differ in at least one of amplitude, curvature, width, angle, radian, width, length, etc. Preferably, the curved cylindrical lens includes a first end and a second end at two ends of the curve. In one embodiment, the curved cylindrical lens includes a plurality of small short lines arranged according to a curve.

In the design of the texture layer, the texture layer comprises a plurality of curve type cylindrical lenses, the curve type cylindrical lenses are sine curves, cosine curves or other irregular curves, the height of the curve type cylindrical lenses at the edges or shearing edges of the texture layer is zero or close to 0, or the curve type cylindrical lenses at the edges or shearing edges are linear or close to linear, so that the saw-toothed shape at the shearing positions is avoided during shearing.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A decorative film is characterized by comprising,

a texture layer having a texture pattern of raised structures and/or recessed structures,

the texture pattern comprises a plurality of strip-shaped textures which are arranged in a crossed mode, wherein the width or the width and the depth of at least one texture groove are arranged in a changing mode along the extending direction or the width and the height of a line are arranged in a changing mode along the extending direction,

the height or depth of the convex structures and/or the concave structures is 0 or close to 0 at the edge of the decorative membrane,

the two textures at the intersection are arranged to overlap each other, or one texture is continuously arranged and the other texture is intermittently arranged.

2. The decorative film of claim 1,

the stripe texture includes cylindrical lenses, which are sinusoidal, cosine or irregular.

3. Decorative film according to claim 1, characterized in that the height or depth of the raised and/or recessed structures in the thickness direction is gradually increased or gradually decreased or alternately increased and decreased.

4. The decorative film of claim 1, wherein said striped texture is linear, curvilinear or dog-legged.

5. The decorative film of claim 1, wherein said grain pattern further comprises a plurality of dots disposed on or near the stripe-like grains.

6. The decorative film of claim 1, wherein each of said textures differs in at least one of amplitude, curvature, width, angle, curvature, width, and length.

7. A mold comprising a molding surface comprising a target texture pattern matching the texture pattern of any one of claims 1 to 6, the target texture pattern being a raised structure and/or a recessed structure for molding the texture pattern.

8. A method of making a mold, comprising the steps of:

9. The method for preparing a mold according to claim 8, wherein the cutter moves in the Z-axis based on a fast cutter servo to form a curve with varying depths.

10. The method of manufacturing a mold according to claim 8, wherein the curved line is replaced with a straight line or a broken line.

11. The method of claim 8, wherein the blade, when moved to the intersection, cuts all or a portion of or bypasses the curve intersecting it.

12. An electronic device cover sheet carrying the decorative film according to any one of claims 1 to 7, wherein a ratio of a covered area of the grain pattern to an area of the decorative film carrying the grain pattern is greater than 80%.