CN216946834U

CN216946834U - Decorative film

Info

Publication number: CN216946834U
Application number: CN202123128213.7U
Authority: CN
Inventors: 邓雄飞; 成杰; 杨光
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-07-12
Anticipated expiration: 2031-12-14

Abstract

The utility model discloses a decorative film, which comprises: the optical film comprises a first texture layer, a first coating layer and an optical adhesive layer, wherein the first texture layer comprises a plurality of first micro-nano structures which are arranged in a protruding and/or recessed mode; the first coating layer is arranged on the surface, far away from the first surface, of the first texture layer, the first coating layer comprises an adhesion-promoting layer, the adhesion-promoting layer is located at the position, far away from the first texture layer, of the first coating layer, the adhesion-promoting layer is made of silicon oxide or zirconium oxide, the optical adhesive layer is arranged on the surface, far away from the first texture layer, of the first coating layer, and the optical adhesive layer is in direct contact with the adhesion-promoting layer. Above-mentioned decorative film has effectively improved the drawing force mean value between optical adhesive layer and the first coating film layer, can satisfy the drawing force demand of terminal customer between decorative film and the glass apron.

Description

Decorative film

Technical Field

The utility model relates to the field of optical films, in particular to a decorative film.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

At present, a scheme of attaching a decorative film to a housing of an electronic device generally includes attaching an OCA optical adhesive film to the back of a decorative film, positioning the decorative film by a CCD, and attaching the decorative film to the housing of the electronic device in a vacuum pressurization manner, so as to finally achieve the gorgeous appearance and durable reliability of the electronic device.

In the existing winding coating, the design of the coating system is usually finished by niobium oxide. The coating material is taken out from the vacuum environment of the coating machine and then attached to the OCA (optical clear adhesive), but the drawing force between the niobium oxide coating and the OCA is lower, usually only 14-18N, and is lower than the standard that the drawing force of an end customer is more than or equal to 16N.

SUMMERY OF THE UTILITY MODEL

The present invention has been made to solve at least one of the above-mentioned problems. The purpose is realized by the following technical scheme:

an embodiment of the present application provides a decoration film, including:

the first texture layer comprises a plurality of first micro-nano structures which are arranged in a protruding and/or recessed mode;

the first coating layer is arranged on the surface of the first texture layer with the first micro-nano structure and comprises an adhesion-promoting layer, the adhesion-promoting layer is positioned at the position, farthest away from the first texture layer, of the first coating layer, and the adhesion-promoting layer is made of silicon oxide or zirconium oxide; and

the optical adhesive layer is arranged on the surface, far away from the first texture layer, of the first coating layer and is in direct contact with the adhesion-promoting layer.

According to the decorative film provided by the embodiment of the application, the adhesion-promoting layer is arranged on the first coating layer and is in direct contact with the optical adhesive layer, the silicon oxide or the zirconium oxide on the adhesion-promoting layer can change the surface energy of the outermost layer, and the intermolecular acting force, hydrogen bonds and other acting bonds on the surface of the first coating layer are increased, so that the drawing force between the optical adhesive layer and the first coating layer can be increased to 20N-24N, the average drawing force is effectively improved, and the drawing force requirement of a terminal customer on the position between the decorative film and the glass cover plate can be met.

In addition, the decorative film according to the embodiment of the utility model can also have the following additional technical characteristics:

in one embodiment, the adhesion promotion layer has a thickness of 5nm to 15 nm.

In one embodiment, the adhesion promotion layer has a thickness of 10 nm.

In one embodiment, the first coating layer further comprises 4-10 layers, and the thickness of each layer is 100nm-600 nm.

In one embodiment, the first film coating layer further comprises a first film layer, a second film layer, a third film layer, a fourth film layer, a fifth film layer, a sixth film layer and a seventh film layer which are sequentially stacked from the position close to the first texture layer to the position far away from the first texture layer, and the adhesion promoting layer is arranged on the surface of the seventh film layer far away from the sixth film layer.

In one embodiment, the first thin film layer is made of silicon, the second thin film layer is made of silicon oxide, the third thin film layer is made of niobium oxide, the fourth thin film layer is made of silicon oxide, the fifth thin film layer is made of niobium oxide, the sixth thin film layer is made of silicon oxide, and the seventh thin film layer is made of niobium oxide.

In one embodiment, the decorative film further comprises a second texture layer, a second coating layer and a coloring layer, wherein the second texture layer is arranged on one side of the first texture layer away from the micro-nano structures, the second texture layer comprises a plurality of second micro-nano structures which are arranged in a protruding and/or recessed mode, the second coating layer is arranged on the surface of the second texture layer away from the first texture layer, and the coloring layer is arranged on the surface of the second coating layer away from the second texture layer.

In one embodiment, the second micro-nano structure has the same structure as the first micro-nano structure.

In one embodiment, the decorative film further comprises a release film, and the release film is attached to the surface, far away from the first coating layer, of the optical adhesive layer.

In one embodiment, the decoration film further comprises a transparent substrate, the transparent substrate comprises a first surface and an oppositely arranged second surface, the first texture layer is arranged on the first surface, and the transparent substrate is a flexible substrate.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic view of a decoration film according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the first coating layer of the decorative film shown in fig. 1.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative term is intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

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 utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that, in the present application, a range represented by "one numerical value to another numerical value" is a general expression avoiding all numerical values in the range from being recited in the specification. Thus, recitation of a range of values herein is intended to encompass any value within the range and any smaller range defined by any value within the range, as if the range and smaller range were explicitly recited in the specification.

An embodiment of the present application provides a decoration film, which can be applied to a housing of an electronic product, such as a front cover or a rear cover, and the decoration film can be attached to a glass cover plate of the front cover or the rear cover. These electronic products include, but are not limited to, cell phones, cameras, tablet computers, terminal displays, and the like.

Referring to fig. 1, the decoration film 100 includes a transparent substrate 110, a first texture layer 120, a first film coating layer 130, an optical adhesive layer 140, a release film 150, a second texture layer 160, a second film coating layer 170, and a coloring layer 180. The transparent substrate 100 includes a first surface 111 and a second surface 112 opposite to the first surface, the first texture layer 120, the first film coating layer 130, the optical adhesive layer 140 and the release film 150 are sequentially stacked on the first surface 111, and the second texture layer 160, the second film coating layer 170 and the colored layer 180 are sequentially stacked on the second surface 112.

In one embodiment, the transparent substrate 110 is a flexible substrate, for example, the material of the transparent substrate 110 is polyethylene terephthalate (PET), Polyimide (PI), transparent polyimide (CPI), Polycarbonate (PC), or polymethyl methacrylate (PMMA). In an embodiment, the transparent substrate 110 may have a single-layer structure or a composite structure formed by a plurality of different materials. In one embodiment, the transmittance of the transparent substrate 110 is not less than 70%.

It should be noted that, in an embodiment, the transparent substrate 110 may be omitted.

Referring to fig. 1, the first texture layer 120 is disposed on the first surface 111, and the first texture layer 120 includes a plurality of first micro-nano structures 121. In an embodiment, the first texture layer 120 is formed by stamping and curing, for example, the first texture layer 120 is formed by coating a UV glue on the first surface 111, stamping a plurality of raised first micro-nano structures 121 and curing. In one embodiment, the first texture layer 120 is realized by roll-to-roll embossing.

In the illustrated embodiment, the first micro-nano structure 121 is a convex structure, and the cross-sectional shape is a minor arc segment. Of course, in other embodiments, the first micro-nano structure 121 may also have a recessed structure, and the cross section may also have other shapes, such as a major arc segment, a triangle, a rectangle, a trapezoid, a polygon, an irregular profile, and the like. In an embodiment, the first texture layer 120 has a plurality of first micro-nano structures 121 in a convex and concave arrangement.

Referring to fig. 1, the first coating layer 130 is disposed on the surface of the first texture layer 120 away from the first surface 111. Referring to fig. 2, the first coating 130 includes an adhesion promoting layer 139, the adhesion promoting layer 139 is located at a position of the first coating 130 farthest from the first texture layer 120, and the adhesion promoting layer 131 is made of silicon oxide or zirconium oxide. In one embodiment, the first plating layer 130 further includes 4-10 layers, each having a thickness of 100nm-600 nm.

Referring to fig. 2, the first film 130 further includes a first film layer 131, a second film layer 132, a third film layer 133, a fourth film layer 134, a fifth film layer 135, a sixth film layer 136, and a seventh film layer 137 sequentially stacked from the direction close to the first texture layer 120 to the direction away from the first texture layer 120, the adhesion promoting layer 139 is disposed on the surface of the seventh film layer 137 away from the sixth film layer 136, and the first film layer 131 directly contacts the first texture layer 120. In one embodiment, the first thin film layer 131 is made of silicon, the second thin film layer 132 is made of silicon oxide, the third thin film layer 133 is made of niobium oxide, the fourth thin film layer 134 is made of silicon oxide, the fifth thin film layer 135 is made of niobium oxide, the sixth thin film layer 136 is made of silicon oxide, the seventh thin film layer 137 is made of niobium oxide, and the adhesion promoting layer 139 is disposed on the surface of the niobium oxide of the seventh thin film layer 137. In one embodiment, the thickness of the first thin film layer 131, the second thin film layer 132, the third thin film layer 133, the fourth thin film layer 134, the fifth thin film layer 135, the sixth thin film layer 136 and the seventh thin film layer 137 is 100nm to 600 nm. In one embodiment, the first coating layer 130 is coated in a roll-to-roll manner. In one embodiment, the first film 130 is formed by an evaporation process.

With reference to fig. 1 and fig. 2, the optical adhesive (OCA) layer 140 is disposed on the surface of the first film plating layer 130 away from the first texture layer 120, and the optical adhesive layer 140 directly contacts the adhesion-promoting layer 139. Because the adhesion promoting layer 139 is arranged on the first coating layer 130, the adhesion promoting layer 139 is in direct contact with the optical adhesive layer 140, the silicon oxide or zirconium oxide of the adhesion promoting layer 139 can change the surface energy of the outermost layer, and increases the intermolecular force, hydrogen bonds and other functional bonds on the surface of the first coating layer 130, the drawing force between the optical adhesive layer 140 and the first coating layer 130 can be increased to 20N-24N, the average drawing force is effectively improved, and the drawing force requirement between the decorative film 100 and the glass cover plate by a terminal customer can be met. In one embodiment, the adhesion promoting layer 139 has a thickness of 5nm to 15 nm. In one embodiment, the adhesion promoting layer 139 has a thickness of 10nm, which can increase the pull force between the first coating layer 130 and the optical adhesive layer 140 without affecting the color.

Referring to fig. 1, the release film 150 is attached to the surface of the optical adhesive layer 140 away from the first plating layer 130. In one embodiment, in use, the release film 150 is separated from the optical adhesive layer 140, and then the optical adhesive layer 140 is attached to the glass cover plate.

Referring to fig. 1, the second texture layer 160 is disposed on the second surface 112, and the second texture layer 160 includes a plurality of second micro-nano structures 161. In an embodiment, the second texture layer 160 is also formed by stamping and curing, for example, the second texture layer 160 is formed by coating a UV glue on the second surface 112, stamping a plurality of raised second micro-nano structures 161 and curing. In one embodiment, the second texture layer 160 is formed by sheet pressing. In other embodiments, the second texture layer 160 may be formed by rolling.

In the illustrated embodiment, the second micro-nano structure 161 and the first micro-nano structure 121 are both convex structures, and are displaced from each other on a projection plane parallel to the first surface 111 without completely overlapping. In other embodiments, the first micro-nano structure 121 and the second micro-nano structure 161 may also be completely overlapped on the projection plane. The first micro-nano structure 121 is one or more of structures such as a cylindrical mirror, a CD pattern, a Fresnel lens, a micro lens and a small short line, and the second micro-nano structure 161 is one or more of structures such as a cylindrical mirror, a CD pattern, a Fresnel lens, a micro lens and a small short line. The structure of the second micro-nano structure 161 may be the same as or different from that of the first micro-nano structure 121. In an embodiment, the first micro-nano structure 121 and the second micro-nano structure 161 interfere with each other to form a texture effect. In an embodiment, the first micro-nano structure 121 and the second micro-nano structure 161 may not interfere with each other to form an optical effect.

In the illustrated embodiment, the second micro-nano structure 161 is a convex structure, and the cross-sectional shape is a minor arc segment. Of course, in other embodiments, the second micro-nano structure 161 may also have a recessed structure, and the cross section may also have other shapes, such as a major arc segment, a triangle, a rectangle, a trapezoid, a polygon, an irregular profile, and the like. In an embodiment, the second texture layer 160 has a plurality of first micro-nano structures 161 in a convex and concave arrangement.

When there is no transparent substrate 110, the second texture layer 160 may be disposed on a side of the first texture layer 120 away from the first micro-nano structure 121.

With reference to fig. 1, the second coating layer 170 is disposed on the surface of the second texture layer 160 away from the second surface 112. In one embodiment, the second plating layer 170 is formed by sheet plating. In one embodiment, the second coating layer 170 is formed by an evaporation process. In one embodiment, the second coating 170 may be the same as the first coating 130 except that the adhesion promoter layer 139 of the first coating 130 is absent.

Referring to fig. 1, the coloring layer 180 is disposed on the surface of the first coating layer 170 away from the second texture layer 160, and the coloring layer 180 can provide color to the decoration film 100. In one embodiment, the colored layer 180 is 3 layers of ink. The material of the colored layer 180 may be selected from a coloring material, a metal oxide or a nonmetal oxide.

All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure 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 specific and detailed, but not to be construed as limiting the scope of the utility model. 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. A decorative film, comprising:

the first coating layer is arranged on the surface, provided with the first micro-nano structure, of the first texture layer and comprises an adhesion promotion layer, the adhesion promotion layer is located at the position, farthest away from the first texture layer, of the first coating layer, and the adhesion promotion layer is made of silicon oxide or zirconium oxide; and

2. The decorative film according to claim 1, wherein the thickness of the adhesion promoting layer is 5nm to 15 nm.

3. The decorative film of claim 2, wherein the adhesion promoting layer has a thickness of 10 nm.

4. The decorative film of claim 1, wherein the first coating layer further comprises 4-10 layers, each layer having a thickness of 100nm-600 nm.

5. The decorative film according to claim 1, wherein the first coating layer further comprises a first film layer, a second film layer, a third film layer, a fourth film layer, a fifth film layer, a sixth film layer and a seventh film layer which are sequentially stacked in a direction from the first texture layer to the position away from the first texture layer, and the adhesion promoting layer is disposed on a surface of the seventh film layer away from the sixth film layer.

6. The decoration film of claim 5, wherein the first thin film layer is made of silicon, the second thin film layer is made of silicon oxide, the third thin film layer is made of niobium oxide, the fourth thin film layer is made of silicon oxide, the fifth thin film layer is made of niobium oxide, the sixth thin film layer is made of silicon oxide, and the seventh thin film layer is made of niobium oxide.

7. The decorative film of claim 1, further comprising a second texture layer, a second coating layer and a coloring layer, wherein the second texture layer is disposed on one side of the first texture layer away from the first micro-nano structure, the second texture layer comprises a plurality of second micro-nano structures which are arranged in a protruding and/or recessed manner, the second coating layer is disposed on the surface of the second texture layer away from the first texture layer, and the coloring layer is disposed on the surface of the second coating layer away from the second texture layer.

8. The decorative film of claim 7, wherein the second micro-nano structure has the same structure as the first micro-nano structure.

9. The decorative film of claim 1, further comprising a release film attached to the surface of the optical adhesive layer away from the first coating layer.

10. The decorative film of claim 1, further comprising a transparent substrate comprising a first surface and an oppositely disposed second surface, the first texture layer being disposed on the first surface, the transparent substrate being a flexible substrate.