CN110039836B

CN110039836B - decorative film

Info

Publication number: CN110039836B
Application number: CN201810035370.7A
Authority: CN
Inventors: 刘伟
Original assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Current assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Priority date: 2018-01-15
Filing date: 2018-01-15
Publication date: 2023-12-05
Anticipated expiration: 2038-01-15
Also published as: CN110039836A

Abstract

The decorative film comprises a film coating layer, a texture layer and an adhesive layer from bottom to top in sequence; the texture layer is arranged on the surface of the adhesive layer, the coating layer is arranged on the surface, far away from the adhesive layer, of the texture layer, the decorative film further comprises a hardening layer located between the texture layer and the adhesive layer, and the hardening layer is directly formed on the adhesive layer. Compared with the prior art, the decorative film reduces the design of a base material layer, has better stretchability and elasticity, reduces the generation of bubbles when being stressed and bent, and can save the cost and lighten the structure.

Description

Decorative film

Technical Field

The invention relates to the technical field of electronic products, in particular to a decorative film of a cover plate or a shell.

Background

Electronic products play an increasingly important role in the life of people, and users are concerned about the functions of the products and have higher and higher requirements on the appearance of the products, so that the electronic products are required to be attractive and elegant and are required to be unique in individuality. Taking a mobile phone as an example, the traditional cover plate shielding area of the electronic product usually adopts a printing mode to form different colors, and the ink printing mode decorates the appearance and has the defects of single integral color, dead plate, lack of vitality and the like. The ever-increasing demands of customers on appearance cannot be met. The decorative film has been gradually introduced into the field of electronic products due to the fact that the decorative film can show a special visual effect in a macroscopic sense, and is particularly applied to structures such as cover plates, machine shells and the like of electronic products such as mobile phones, tablet computers and ultra-polar notebooks. However, the current decorative film is not light and thin in structure and not optimized in performance.

Disclosure of Invention

Based on the above, the invention provides a light, thin, low-cost and high-performance decorative film.

The decorative film comprises a film coating layer, a texture layer and an adhesive layer from bottom to top in sequence; the texture layer is arranged on the surface of the adhesive layer, the coating layer is arranged on the surface, far away from the adhesive layer, of the texture layer, the decorative film further comprises a hardening layer located between the texture layer and the adhesive layer, and the hardening layer is directly formed on the adhesive layer. Compared with the prior art, the decorative film reduces a layer of base material, and the design ensures that the decorative film has better stretchability and elasticity, can reduce the generation of bubbles when being stressed and bent, and can realize the effects of saving the cost and making the structure light and thin.

In one embodiment, the texture layer includes protrusions and grooves formed between adjacent protrusions, the protrusions and the grooves are located on one side, away from the adhesive layer, of the texture layer, and the cross sections of the protrusions are arc-shaped or triangular. The presence of the protrusions and the grooves can enable the decorative film to generate special visual effects, and surface brightness is increased; the protrusions are designed into different shapes, so that the decorative film has running effects such as dynamic light columns and waves.

In one embodiment, the width of the raised cross section is 0-500 microns. The larger the width of the protrusions, the stronger the effect of a single texture, but when the span is greater than 500 micrometers, the number of textures per unit area is too small, and the overall visual effect is not attractive.

In one embodiment, the height of the protrusions is 2-30 microns. When the height of the protrusions is smaller than 2 microns, the light beam effect is not obvious; the larger the height of the protrusions is, the stronger the texture stereoscopic effect is, but when the height dimension is more than 30 micrometers, the processing is difficult and the process yield is low, thereby increasing the cost.

In one embodiment, the width of the cross section of the groove is 0-500 micrometers. The width of the groove is too small, which affects the optical interference effect of the decorative film. When the cross section width of the groove is 0, no gaps exist between the protrusions, and the protrusions are continuously arranged; when the groove cross-sectional width is greater than 500 micrometers, the overall texture effect is reduced.

In one embodiment, the overall thickness of the texture layer is 5-50 microns, and the size design can make patterns with various shapes on the texture layer, so that the decorative film has higher interference effect and meets special visual effect.

In one embodiment, the thickness of the coating layer is 10-1000 nm, and the coating layer is of a single-layer film or multi-layer film structure. The thickness design is in this range, the manufacturing process is simple, and the requirements of the cover plate on the appearance effect can be met.

In one embodiment, the decorative film having the above characteristics further includes a release film, and the release film is located on a surface of the adhesive layer away from the texture layer. The release film can protect the decorative film from being polluted and damaged before being put into practical use.

The cover plate comprises a substrate and the decorative film with the characteristics, wherein the adhesive layer of the decorative film is attached to the substrate. The combination mode of the base plate and the decorative film is simple, and the manufacture is convenient.

In one embodiment, the cover plate includes a bottom cover layer disposed on a side of the decorative film away from the substrate. A layer of cover bottom layer is additionally arranged on the decorative film, so that a better shielding effect is achieved.

Drawings

FIG. 1 is a schematic cross-sectional view of a decorative film of the present invention.

FIG. 2 is a schematic cross-sectional view of a texture layer according to an embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of a texture layer according to a second embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a three-texture layer according to an embodiment of the present invention.

FIG. 5 is a schematic cross-sectional view of a fourth texture layer according to an embodiment of the present invention.

FIG. 6 is a schematic cross-sectional view of a cover plate of the present invention.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended 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.

It will be understood that when an element is referred to as being "fixed 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. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

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 herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a decorative film 10 according to the present invention includes a coating layer 70, a texture layer 60 and an adhesive layer 40 from bottom to top. The texture layer 60 is disposed on the surface of the adhesive layer 40, and the coating layer 70 is disposed on the surface of the texture layer 60 away from the adhesive layer. The decorative film 10 further includes a hardening layer (not shown) between the texture layer 60 and the adhesive layer, the hardening layer being formed directly on the adhesive layer 40.

As shown in fig. 2 and 4, the thickness of the adhesive layer 40 is 10 to 200 micrometers, and more preferably, the thickness of the adhesive layer 40 is 20 to 50 micrometers.

The texture layer 60 includes a plurality of protrusions 62 and a plurality of grooves 64 formed between adjacent protrusions 62. The protrusions 62 and the grooves 64 are located on a side of the texture layer 60 remote from the adhesive layer 40. The cross section of the protrusion 62 is arc-shaped. In some embodiments, the projections 62 are triangular in cross-section. The presence of the protrusions 62 and the grooves 64 may create a particular visual effect on the decorative film 10, increasing the surface brightness; designing the protrusions 62 to be different shapes may provide the decorative film 10 with dynamic light pillar, wave, etc.

The width a of the cross section of the protrusion 62 is 0 to 500 micrometers. In some embodiments, the width a of the cross section of the protrusions 62 is 0 to 60 microns. In another embodiment, the width a of the cross section of the protrusions 62 is 0-20 microns. In another embodiment, the width a of the cross section of the protrusion 62 is 100-500 microns. In other embodiments, the width a of the cross-section of the protrusions 62 is 160-500 microns. The width a of the cross section of the protrusion 62 is different, and the brightness and the pattern effect of the decorative film 10 are different in the whole.

The width b of the cross section of the groove 64 is 0-500 micrometers, and in some embodiments, as shown in fig. 3 and 5, the width b of the cross section of the groove 64 is 0 micrometers, and there is no gap between the protrusions 62, i.e. there is no groove 64, and the protrusions 62 are arranged continuously. In another embodiment, the width b of the cross section of the groove 64 is less than 10 microns. In another embodiment, the width b of the cross section of the groove 64 is 100-500 microns. In other embodiments, the width b of the cross section of the groove 64 is 160-500 microns. The width b of the cross section of the groove 64 is different, and the decorative film 10 has a different interference effect on the whole.

The overall thickness d of the texture layer 60 is 5 to 50 microns. In some embodiments, the overall thickness d of the texture layer 60 is 10-30 microns and the height d1 of the protrusions 62 is 2-30 microns. In another embodiment, the overall thickness d of the texture layer 60 is 10-30 micrometers, and the height d1 of the corresponding protrusions 62 is 2-8 micrometers. In another embodiment, the overall thickness d of the texture layer 60 is 10-30 micrometers, and the height d1 of the corresponding protrusions 62 is 15-30 micrometers. The height d1 of the protrusions 62 is different, and the stereoscopic effect of the decorative film 10 is different.

The coating layer 70 is a single-layer film or a multi-layer film structure. The thickness of the coating layer 70 is 10 to 1000nm, more preferably, the thickness of the coating layer 70 is 20 to 500nm, still more preferably, the thickness of the coating layer 70 is 50 to 200nm.

The decorative film 10 further includes a release film (not shown) disposed on a side of the adhesive layer 40 remote from the texture layer 60.

As shown in fig. 6, the present invention further discloses a cover plate 100, which includes a substrate 5 and the decorative film 10, and the decorative film 10 can be attached to the substrate 5 through the adhesive layer 40 after the release film is torn off.

In some embodiments, the cover plate 100 may further include a bottom cover layer 80, where the bottom cover layer 80 is disposed on a side of the decorative film 10 away from the substrate 5, and the bottom cover layer 80 is a single-layer ink or a multi-layer ink, and the bottom cover layer 80 has a thickness of 5 to 50 micrometers, and more preferably, the bottom cover layer 80 has a thickness of 10 to 25 micrometers.

Compared with the prior art, the invention reduces one substrate layer, and the adhesive layer 40 is directly coated with a layer of hardening resin and other materials to harden the surface of the adhesive layer 40, thereby facilitating the adhesion of the texture layer 60 on the adhesive layer 40. Such a design allows the decorative film 10 to have better stretchability and elasticity, reduces the generation of air bubbles when subjected to bending, and at the same time allows for cost savings and a lighter and thinner construction. The protrusions 62 are designed to have an arc or triangle structure in the cross-section direction, which can have the effect of running a dynamic light beam, and simultaneously improve the brightness of the appearance. The larger the width of the cross section of the protrusions 62, the more effective a single protrusion 62 can be, while the total number of protrusions 62 per unit area can be reduced. The height of the protrusions 62 affects the stereoscopic effect of the decorative film, and the higher the height, the stronger the stereoscopic effect of the decorative film 10. The width of the groove 64 in cross section affects the optical interference effect of the decorative film 10. The design of the width, height and width of the protrusions 62 and the recesses 64 can be adjusted based on the overall design requirements.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only one embodiment of the invention, which is described in more detail and is not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The decorative film is characterized by sequentially comprising a coating layer, a texture layer and an adhesive layer from bottom to top, wherein the decorative film does not contain a substrate layer; the texture layer is arranged on the surface of the adhesive layer, the coating layer is arranged on the texture layer and away from the surface of the adhesive layer, the decorative film further comprises a hardening layer arranged between the texture layer and the adhesive layer, the texture layer is directly formed on the surface of the hardening layer, the texture layer comprises protrusions and grooves formed between the protrusions, the protrusions and the grooves are arranged on one side, away from the adhesive layer, of the texture layer, the cross section of each protrusion is arc or triangle, the width of the cross section of each protrusion is 100-500 microns, the height of each protrusion is 2-30 microns, and the width of each groove is 100-500 microns.

2. The decorative film of claim 1 wherein the overall thickness of the textured layer is from 5 to 50 microns.

3. The decorative film according to claim 1, wherein the thickness of the coating layer is 10-1000 nm, and the coating layer is a single-layer film or a multi-layer film structure.

4. A decorative film according to any one of claims 1 to 3, further comprising a release film, said release film being located on a surface of said adhesive layer remote from said textured layer.

5. A cover plate, characterized by comprising a substrate and any one of the decorative films of claims 1-3, wherein the decorative film is attached to the substrate through the adhesive layer.

6. The cover sheet of claim 5 including a base cover layer disposed on a side of the decorative film remote from the substrate.