CN112848529A

CN112848529A - Optical leather

Info

Publication number: CN112848529A
Application number: CN202010217207.XA
Authority: CN
Inventors: 洪莘; 刘立冬; 高育龙
Original assignee: Shine Optoelectronics Kunshan Co Ltd
Current assignee: Shine Optoelectronics Kunshan Co Ltd
Priority date: 2019-11-26
Filing date: 2020-03-25
Publication date: 2021-05-28
Also published as: CN212259486U; CN212889312U; CN212889230U; CN112848530A; CN212528973U

Abstract

The invention discloses an optical leather, which comprises an embossed leather layer and an optical layer; the embossed leather layer comprises a visible visual side and an oppositely disposed inner or visual side, and the embossed leather layer has a plurality of textures with a cortical visual sensation and a tactile sensation on the visual side; the optical layer is arranged on the inner side of the embossed leather layer and comprises a micro-nano structure layer with an optical effect. The optical effect of the optical layer can make the leather quality of the embossed leather layer brighter, the color thereof brighter, or the embossed leather layer presents light and shadow stripes which change along with vision, so that the leather quality of the optical leather is more outstanding. The optical leather can be applied to the fields of mobile phone shells, electronic equipment shells, anti-counterfeiting fields, shoe and clothes fields, leather bag fabrics, automobile interior decorations, cosmetics and other packaging boxes.

Description

Optical leather

PRIORITY INFORMATION

This application claims priority and benefit to a patent application entitled "an optical leather" having patent application number 201911174116.6 filed on 26.11.2019 and entitled "an optical leather" and is incorporated herein by reference in its entirety.

Technical Field

The invention relates to an optical leather.

Background

Artificial leather and synthetic leather are important components of the plastic industry and are widely used in various industries of national economy. The artificial leather and synthetic leather have been developed internationally for more than 60 years, and the artificial leather is developed and produced in China since 1958, which is an earlier developed industry in the plastic industry in China. In recent years, the development of the industries of Chinese artificial leather and synthetic leather not only increases the equipment production line of production enterprises, the product yield increases year by year, and the variety and the color increase year by year, but also has own industry organization in the industry development process and has considerable cohesion, so that the enterprises of Chinese artificial leather and synthetic leather, including related industries, can be organized together to develop a rather powerful industry. The artificial leather and the synthetic leather are adopted to make bags, clothes, shoes, vehicles, furniture, electronic products and the like, which are increasingly determined by the market, have wide application range, large quantity and various varieties, and cannot be met by the traditional natural leather.

Generally, the artificial leather is produced by using PVC and PU as raw materials; the synthetic leather is produced by using PU, PVC and non-woven fabrics as raw materials. The problems of the existing artificial leather and synthetic leather generally comprise unclear patterns, dark color and luster and the like.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide an optical leather to solve at least one existing technical problem.

The technical scheme adopted by the invention for solving the defects of the prior art is as follows:

an optical leather comprising:

an embossed leather layer comprising a visible visual side and an oppositely disposed inner side, the embossed leather layer having a plurality of textures of a cortical look and feel on the visual side;

the optical layer is arranged on the inner side or the visual side of each embossed layer and comprises a micro-nano structure layer with an optical effect.

In one embodiment, the micro-nano structure layer comprises a plurality of micro-nano structures which are arranged in a protruding and/or recessed mode, and the optical layer further comprises a coating layer arranged on the micro-nano structure layer.

In one embodiment, the micro-nano structure layer comprises a plurality of micro-nano structures formed by stamping with colored curing glue or colorless curing glue, and the plurality of micro-nano structures are arranged in a protruding and/or recessed manner.

In one embodiment, the optical layer further comprises a base layer, the micro-nano structure layer is arranged between the base layer and the coating layer, and the base layer is one of a PET layer, a PI layer, a CPI layer, a PC layer or a PMMA layer or a composite layer.

In one embodiment, the optical layer further comprises a coloring layer for priming or assisting color development, and the coating layer is arranged between the micro-nano structural layer and the coloring layer.

The other technical scheme of the invention is as follows: an optical leather comprising:

the optical layer, the optical layer set up in the inboard or the vision side of each layer of impressed watermark, the optical layer is including the picture and text layer that fills the material and form in the slot, picture and text layer display colour and/or pattern.

In one embodiment, the optical layer further comprises a base layer and a film coating layer, and the image-text layer is arranged between the base layer and the film coating layer.

The invention adopts another technical scheme that: an optical leather comprising:

the optical layer is arranged on the inner side or the visual side of each embossed layer, the optical layer comprises an image-text layer and a micro-nano structure layer, the micro-nano structure layer comprises a plurality of micro-nano structures which are periodically or randomly arranged, the image-text layer comprises a plurality of micro-images and texts, and the micro-nano structures and the micro-images and texts are correspondingly arranged to form floating and/or sinking image-text images.

In one embodiment, the optical layer is disposed between the optical layer and the embossed leather layer, or the optical layer is disposed between the embossed leather layer and the auxiliary leather layer.

In one embodiment, the embossed leather layer is made of PU, PVC or TPU material; the auxiliary leather layer is made of PU, PVC or TPU materials.

In one embodiment, the optical leather further comprises a cloth layer, and the optical layer is disposed between the auxiliary leather layer and the cloth layer, or the auxiliary leather layer is disposed between the optical layer and the cloth layer.

In one embodiment, the auxiliary leather layer and the cloth layer are combined and bonded to the optical layer through a bonding layer.

In one embodiment, the optical leather further comprises a support layer or a carrier layer for supporting other layers of the optical leather.

In one embodiment, the optical leather further comprises a foaming layer and an abrasion-resistant layer, wherein the foaming layer is arranged on the visual side of the embossed leather layer, and the abrasion-resistant layer is covered on the foaming layer; or the optical leather further comprises an abrasion resistant layer disposed on the viewing side of the embossed leather layer.

In one embodiment, an adhesive layer is disposed between the optical layer and the auxiliary leather layer or the embossed leather layer.

Compared with the prior art, the embossed leather layer has the beneficial effects that the leather of the embossed leather layer is brighter and the color of the embossed leather layer is brighter due to the optical effect of the optical layer, or the light and shadow stripes changing along with vision are presented, so that the leather of the optical leather is more outstanding in visual sense.

Drawings

FIG. 1a is a schematic structural view of an optical leather of the present invention;

FIG. 1b is a schematic view of another structure of the optical leather of FIG. 1 a;

FIG. 1c is a schematic view of another embodiment of the optical leather of FIG. 1 a;

FIG. 1d is a schematic view of another embodiment of the optical leather of FIG. 1 a;

FIG. 2 is a schematic view of another construction of the optical leather of the present invention;

FIG. 3 is a schematic view of another construction of the optical leather of the present invention;

FIG. 4 is a schematic view of another construction of the optical leather of the present invention;

FIG. 5 is a schematic view of another construction of the optical leather of the present invention;

FIG. 6 is a schematic view of another construction of the optical leather of the present invention;

FIG. 7 is a schematic representation of another construction of the optical leather of the present invention;

FIG. 8 is a schematic representation of another construction of the optical leather of the present invention;

FIG. 9 is a schematic view of another construction of the optical leather of the present invention.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described below. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used 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. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The invention discloses an optical leather, comprising:

an embossed leather layer comprising a visible visual side and an oppositely disposed inner or visual side, the embossed leather layer having a plurality of textures of a cortical look and feel on the visual side;

the optical layer is arranged on the inner side of each embossed layer and comprises a micro-nano structural layer with an optical effect.

The optical effect of the optical layer can make the leather quality of the embossed leather layer brighter, the color thereof brighter, or the embossed leather layer presents light and shadow stripes which change along with vision, so that the leather quality of the optical leather is more outstanding. The optical leather can be applied to the fields of mobile phone shells, electronic equipment shells, anti-counterfeiting fields, shoe and clothes fields, leather bag fabrics, automobile interior decorations, cosmetics and other packaging boxes.

Furthermore, the micro-nano structure layer comprises a plurality of micro-nano structures which are arranged in a protruding and/or concave mode, and the optical layer further comprises a coating layer arranged on the micro-nano structure layer. The micro-nano structure comprises various linear cylindrical mirrors, CD grains, small short lines, wiredrawing grains, Fresnel lenses, micro lenses and the like, can enhance the color and texture display of the optical leather, and can also form light shadow bright grains moving along with a visual angle, so that the optical leather has more obvious texture, more gorgeous color, more clear pictures and texts and better decorative effect. The cylindrical mirror comprises a linear cylindrical mirror, a curved cylindrical mirror or a polygonal line cylindrical mirror. The small stubs may be arranged in a predetermined rule. The coating layer is plated on the micro-nano structure in modes of evaporation plating, sputtering plating, ion plating, electroplating and the like, and can also be formed on the micro-nano structure in modes of coating and the like, so that the optical effect of the micro-nano structure can be enhanced, and the color can be provided for optical leather.

Further, the micro-nano structure layer comprises a plurality of micro-nano structures formed by stamping colored curing glue or colorless curing glue, and the plurality of micro-nano structures are arranged in a protruding and/or recessed mode. The micro-nano structure layer is colored curing glue and is formed into a micro-nano structure through imprinting and curing, and the micro-nano structure layer has an optical effect and provides colors for the optical leather. In other embodiments, the coating layer can be arranged to increase the optical effect.

Further, the optical layer also comprises a base layer, the micro-nano structure layer is arranged between the base layer and the coating layer, and the base layer is one of a PET layer, a PI layer, a CPI layer, a PC layer or a PMMA layer or a composite layer. Forming a micro-nano structure layer, a coating layer and the like on the base layer to form an optical layer, wherein the optical layer is laminated with the embossed leather layer directly or through an adhesive layer. An optical layer can be directly formed on the embossed leather layer, or the micro-nano structure layer and the coating layer are formed on the base layer and then the base layer is torn off and compounded to the embossed leather layer. The base layer can be arranged to facilitate the formation of a micro-nano structure layer, a coating layer and the like, the thickness of the whole optical leather can be reduced without the base layer, and the thinning is realized.

Further, the optical layer also comprises a coloring layer for priming or assisting color development, and the coating layer is arranged between the micro-nano structural layer and the coloring layer. Printing ink is printed on one side of the coating layer, which is far away from the micro-nano structure layer, so as to form a coloring layer, and the coloring layer is used for priming or auxiliary color development.

Furthermore, the optical leather also comprises an auxiliary leather layer, wherein the auxiliary leather layer is arranged between the optical layer and the embossed leather layer, or the optical layer is arranged between the embossed leather layer and the optical layer. The embossed leather layer is made of PU, PVC or TPU materials; the auxiliary leather layer is made of PU, PVC or TPU materials. The auxiliary leather layer is used for enhancing the elasticity of the optical leather, has better leather touch feeling and can also provide color for the optical leather. The auxiliary leather layer can be arranged on the inner side of the embossed leather layer, at the moment, two or more layers of PU, PVC or TPU are overlapped, the most surface layer forms a texture structure through embossing treatment, and the auxiliary leather layer and the embossed leather layer can have an obvious interface or no interface. The secondary leather layer may also be laminated to the embossed leather layer by a bonding material. The auxiliary leather layer can also be arranged in other layers, for example, the auxiliary leather layer is arranged on one side of the optical layer, which is far away from the embossed leather layer, and the same effect can be achieved.

Furthermore, the optical leather also comprises a cloth layer, and the optical layer is arranged between the auxiliary leather layer and the cloth layer, or the auxiliary leather layer is arranged between the optical layer and the cloth layer. The cloth layer can increase the ductility and plasticity of the optical leather. The cloth layer can be arranged independently or compounded with the auxiliary leather layer, namely at least part of material of the auxiliary leather layer penetrates into the cloth layer, or the auxiliary leather layer is compounded with the cloth layer through a bonding material. The material of the cloth is a cloth generally used for forming artificial leather or synthetic leather, and reference can be made to the prior art, which will not be described in detail herein. When the auxiliary leather layer and the cloth layer are compounded, the auxiliary leather layer is bonded with the optical layer through the bonding layer.

Further, the optical leather further comprises a support layer or a bearing layer, and the support layer or the bearing layer is used for supporting other layers of the optical leather. Can be a plastic bracket, a glass bracket, a metal bracket and the like, can be a grid bracket or a plate bracket. After the support layer is arranged, the optical leather is shaped, and the plastic film is suitable for the fields of electronic equipment shells (such as mobile phone rear covers), automobile interiors, packaging boxes, wall decorations and the like. The bearing layer is a plastic layer, a metal layer, a glass layer, a cloth layer and the like, and shapes the optical leather so as to be suitable for more application fields.

The optical leather further comprises a foaming layer and a wear-resistant layer, wherein the foaming layer is arranged on the visual side of the embossed leather layer, and the wear-resistant layer is covered on the foaming layer. The foaming layer is used for increasing the elasticity of leather, has better hand feeling, and the wear-resistant layer increases the wear resistance of the optical leather. In other embodiments, the optical leather does not include a foamed layer, but includes an abrasion resistant layer disposed on the viewing side of the embossed leather layer to increase the abrasion resistance of the optical leather.

Furthermore, an adhesive layer is arranged between the optical layer and the auxiliary leather layer or the embossed leather layer. The adhesive layer comprises OCA, silica gel, acrylic adhesive, UV adhesive, double faced adhesive tape and other adhesive materials.

Further, the optical layer is disposed on the viewing side of the embossed leather layer. The optical layer can enable the embossed leather layer to have an optical effect, have more gorgeous colors or can display bright patterns, and have a more outstanding visual effect, or the optical layer can enable the optical leather to at least partially display gradient colors, logo and the like, or the optical layer can enable the optical leather to have floating and/or sinking images, and has anti-counterfeiting and decorative effects.

The invention discloses another optical leather, which comprises:

The optical layer also comprises a base layer and a coating layer, and the image-text layer is arranged between the base layer and the coating layer.

The color is, for example, a solid color or a gradient color, and the pattern is, for example, a predetermined pattern or logo. The picture and text layer sets up inside the impressed watermark leather layer, and the picture and text of following formation of image in the optics leather is more real, more natural.

Other layers of the optical leather layer can be referred to above and will not be described in detail here.

The invention discloses another optical leather, which comprises:

the optical layer is arranged on the inner side or the visual side of each embossed layer, the optical layer comprises an image-text layer and a micro-nano structure layer, the micro-nano structure layer comprises a plurality of micro-nano structures which are periodically or randomly arranged, the image-text layer comprises a plurality of micro-images and texts, and the micro-nano structures and the micro-images and texts are correspondingly arranged to form floating and/or sinking image-text images. The formed image can be used for decoration and/or anti-counterfeiting.

Hereinafter, the optical leather of the present invention will be described by way of example with reference to the drawings.

Referring to fig. 1a, the present invention discloses an optical leather 100, which includes an optical layer 11 and an embossed leather layer 12 stacked together. The optical layer 11 includes a base layer 111, a micro-nano structure layer 112 disposed on the base layer 111, and a coating layer 113 disposed on the micro-nano structure layer 112. Micro-nano structure layer 112 includes a plurality of micro-nano structures 1121 having an optical effect. Embossed leather layer 12 includes a visible side 121 and an oppositely disposed inner side 122, and embossed leather layer 12 has a plurality of textures (not shown) with a cortical look and feel on visible side 121. Optical layer 11 is disposed on inner side 122 of embossed leather layer 12. One or more layers of the embossed leather layer 12, the base layer 111, the micro-nano structure layer 112 and the coating layer 113 are independently developed or cooperatively developed. The optical effect of optical layer 11 may make the leather of embossed leather layer 12 brighter, the color brighter, or the stripes of light and shadow that change with vision, so that the leather of optical leather 100 is more visually appealing. The optical leather 100 can be applied to the fields of mobile phone shells, electronic equipment shells, anti-counterfeiting fields, shoe and clothes fields, leather bag fabrics, automobile interior decorations, cosmetics and other packaging boxes.

With continued reference to fig. 1a, the base layer 111 is one or a composite of a PET layer, a PI layer, a CPI layer, a PC layer, or a PMMA layer, and can be colorless and transparent, and can provide color directly to the optical leather 100 or in combination with other layers.

The micro-nano structure layer 112 is formed by coating a curing adhesive, such as a UV adhesive, on the base layer 111, and stamping and curing the coating to form the micro-nano structure 1121. The micro-nano structure 1121 is arranged in a protruding and/or recessed manner and comprises various linear cylindrical mirrors (a linear cylindrical mirror, a curved cylindrical mirror and a polygonal line cylindrical mirror), CD (compact disc) grains, small short lines, wire drawing grains, Fresnel lenses, micro lenses and the like; the cross-sectional shape of each micro-nano structure 112 includes triangle, bow, arc, rectangle, trapezoid, irregular shape, etc.; a plurality of micro-nano structures 1121 are distributed at intervals or without intervals. In other embodiments, micro-nano structure 1121 may also be formed by laser direct writing or the like, or micro-nano structure 1121 is formed by etching base layer 111.

The plated layer 113 is formed on the micro-nano structure 1121 by evaporation, sputtering, ion plating, electroplating, or the like, and can enhance the optical effect of the micro-nano structure 1121 and provide color to the optical leather. The plated layer 113 may be a single layer, or may be a multi-layer composite of 2 to 8 layers, and may be formed by coating in the case of a single layer. In other embodiments, at least one of the coatings 113 may have a variable thickness and/or a variable material configuration for each region, and may exhibit a variable color, such as a gradient color or multiple colors.

Embossed leather layer 12 exhibits a leather texture by embossing PU, PVC, TPU materials. The thickness of the embossed leather layer 12 is not less than 50 μm; the embossed leather layer 12 is colored or colorless and transparent, and has a transmittance of greater than 30%. The optical effect and color of the optical layer 11 can be visually seen through the embossed leather layer 12, so that the embossed leather layer 12 is richer and more bright in color, more obvious and clear in texture, and more excellent optical leather is formed. The embossed leather layer 12 may be directly formed on the other side of the base layer 111 opposite to the micro-nano structure layer 112, for example, PU resin is coated on PET, and then an embossing process is performed to form the embossed leather layer 12. Alternatively, embossed leather layer 12 may be bonded to base layer 111 by an adhesive material (e.g., OCA). In other embodiments, the PU material is coated on a release paper (not shown), and then the optical layer 11 is attached and dried; or, the release paper is coated with the PU material, dried and then coated with the adhesive material, and the optical layer 12 is bonded by the adhesive material.

With continued reference to fig. 1a, further, the optical leather 100 further includes an auxiliary leather layer 13 and a cloth layer 14. The auxiliary leather layer 13 is arranged on the other side of the coating layer 113 opposite to the micro-nano structure layer 112, and the cloth layer 14 is arranged on the other side of the auxiliary leather layer 13 opposite to the coating layer 113. Auxiliary leather layer 13 is a PU, PVC or TPU material having a thickness of 50 μm to 2000 μm, and auxiliary leather layer 13 serves to increase the leather feel of elastically reinforced embossed leather layer 12 and to increase the stretchability of optical leather 100. The auxiliary leather layer 13 is a colorless or colored layer, and when the auxiliary leather layer is a colored layer, the color can be provided for the optical leather 100 alone, or the auxiliary leather layer can be combined with the coating layer 113 and the like to provide the optical leather 100 with a composite color. The cloth layer 14 is a cloth material commonly used in the art for leather base cloth, such as non-woven cloth, etc., but not listed here. Coating PU material on the coating layer 113 to form an auxiliary leather layer, and simultaneously compounding the fabric layer 14. In other embodiments, cloth layer 14 is bonded to the secondary leather layer by adhesive material bonding.

Further, the viewing side 121 of the embossed leather layer 12 is provided with a foaming layer 15, and the foaming layer 15 is used for increasing the touch of the leather. The visual side 121 of the embossed leather layer 12 is coated with a foam material and dried to form a foam layer 15.

Further, the other side of the foaming layer 15 opposite to the embossed leather layer 12 is provided with an abrasion resistant layer 16 to increase the abrasion resistance of the optical leather 100. In other embodiments, the abrasion resistant layer 16 is disposed directly on the embossed leather layer 12 to increase the abrasion resistance of the optical leather 100.

In the optical leather 100, the optical layer 11 includes a base layer 111, a micro-nano structure layer 112 and a coating layer 113, the micro-nano structure layer 112 has a plurality of micro-nano structures 1121 which are arranged in a concave-convex manner, and has an optical effect, so that the leather of the embossed leather layer 12 presents the optical effect, and the optical leather 100 is brighter and more beautiful in color and clearer in texture.

In other embodiments, as shown in fig. 1b, in the optical leather 101, the optical layer 17 includes a base layer 171 and a micro-nano structure layer 172, the micro-nano structure layer 172 includes a plurality of micro-nano structures 1721 arranged in a concave-convex manner, where the micro-nano structure layer 172 is a colored layer. And coating color glue on the base layer 171, stamping and curing to form the micro-nano structure layer 172. The micro-nano structure 1721 presents color and optical effects. In other embodiments, the micro-nano structure layer 172 may also be a colorless transparent layer.

In other embodiments, such as the optical leather 102 shown in FIG. 1c, the optical layer 18 includes a base layer 181, a graphics layer 182, and a coating layer 183. The graphics layer 182 displays color and/or pattern, and the film layer 183 enhances the display of color or graphics. A curing glue (such as UV glue) is arranged on the base layer 181, pressed and cured to form a groove, a colored material such as ink is filled in the groove to form a pattern layer 182, and then a coating layer 183 is formed on the pattern layer 182 by evaporation. The graphics of the graphics layer 182 may be displayed in only colors, such as red, blue, etc., or may be gradated. The graphics of the graphics layer 182 can also be a graphic display, such as a picture, a text, a logo, etc.

In other embodiments, as shown in fig. 1d, in the optical leather 103, the optical layer 19 includes a base layer 191, a micro-nano structure layer 192, a graphics context layer 193, and a coating layer 194. The micro-nano structure layer 192 and the image-text layer 193 are arranged on two sides of the base layer 191 (or on one side of the base layer 191), and the coating layer 194 is coated on the micro-nano structure layer 192. In one mode, the image-text layer 193 displays colors or images and texts, and the micro-nano structure layer 192 enhances the display of the colors or the images and texts; in another mode, the micro-nano structure layer 192 includes a plurality of micro-nano structures arranged periodically or randomly, such as fresnel lenses, micro-lenses or cylindrical mirrors, the image-text layer 193 includes a plurality of micro-images and texts, the micro-lenses and the micro-images and texts are arranged correspondingly to form floating and/or sinking image-text images, and the image-text image has decoration and anti-counterfeiting effects; yet another way is a combination of the two aforementioned ways.

Referring to fig. 2, the present invention discloses another optical leather 200, which comprises a fabric layer 24, an auxiliary leather layer 23, an adhesive layer 27, an optical layer 21, an embossed leather layer 22, a foaming layer 25 and an abrasion resistant layer 26, which are sequentially stacked. The layers may be formed sequentially, or the optical layer 21 may be formed separately and then bonded to the auxiliary leather layer 23 through the adhesive layer 27. After the auxiliary leather layer 23 and the cloth layer 24 are formed, the auxiliary leather layer and the cloth layer are laminated with the optical layer 21 through the adhesive layer 27, and then the embossed leather layer 22, the foaming layer 25 and the wear-resistant layer 26 are sequentially formed on the optical layer 21. In other embodiments, embossed leather layer 22, foam layer 25, and abrasion resistant layer 26 are formed and then bonded to optical layer 21. The optical layer 21 comprises a base layer 211, a micro-nano structure layer 212 and a coating layer 213. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 3, another optical leather 300 is disclosed, which comprises a fabric layer 34, an adhesive layer 37, an optical layer 31, an auxiliary leather layer 33, an embossed leather layer 32, a foaming layer 35 and an abrasion resistant layer 36, which are sequentially stacked. Wherein, the auxiliary leather layer 33 and the embossed leather layer 32 are in contact lamination, the auxiliary leather layer 33 and the embossed leather layer 32 can be formed in sequence, and no obvious limit exists between the auxiliary leather layer 33 and the embossed leather layer 32, so that the leather layer can be regarded as an integral structure; the secondary leather layer 33 and the embossed leather layer 32 are formed in one piece, one side of the PU material layer is used to emboss the texture to form the embossed leather layer 32, and the unembossed part forms the secondary leather layer 33. If necessary, a plurality of layers of PU material may be applied, and the PU material on the uppermost side may be embossed to form an embossed leather layer 32, and the PU material on the bottom side may be embossed to form an auxiliary leather layer 33. Auxiliary leather layer 33 and embossed leather layer 32 may be the same or different colors, such as auxiliary leather layer 33 being a colored layer and embossed leather layer 32 being a clear, colorless layer. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 4, another optical leather 400 is disclosed that includes an optical layer 41, a secondary leather layer 43, an embossed leather layer 42, and an abrasion resistant layer 46, all of which are sequentially stacked. The optical layer 41 includes a base layer 411, a micro-nano structure layer 412, a coating layer 413 and a coloring layer 414. The coloring layer 414 is disposed on a side of the coating layer 413 away from the micro-nano structure layer 412. The coloring layer 414 is used for coloring and priming, and can assist the coating layer 413 and the auxiliary leather layer 43 to color. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 5, the present invention discloses another optical leather 500, which comprises a cloth layer 54, an auxiliary leather layer 53, an adhesive layer 57, an optical layer 51, an embossed leather layer 52, a foaming layer 55, and an abrasion resistant layer 56, which are sequentially stacked. The optical layer 51 comprises a micro-nano structure layer 512 and a coating layer 513. The optical layer 51 in this embodiment does not have a base layer, and the forming method may be to separate the base layer after forming the micro-nano structure layer 512 and the coating layer 513 on the base layer, or to coat a curing adhesive on the embossed leather layer 52 and then imprint and cure the curing adhesive to form the micro-nano structure layer 512, and then to set the coating layer 513 on the micro-nano structure layer 512, and to bond the auxiliary leather layer 53 through the bonding layer 57. The absence of a base layer for optical layer 51 may reduce the thickness of optical leather 500. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 6, the present invention discloses another optical leather 600, which comprises a cloth layer 64, an auxiliary leather layer 63, an optical layer 61, an embossed leather layer 62, a foaming layer 65 and an abrasion resistant layer 66, which are sequentially stacked. The optical layer 61 includes a micro-nano structure layer 612 and a coating layer 613. The optical layer 61 in this embodiment does not have a base layer, reducing the overall thickness of the optical leather 600. One molding method is that an embossed leather layer 52 is formed, UV glue is coated on the embossed leather layer 52, a micro-nano structure layer 612 is formed after embossing and curing, and a coating layer 613 is plated on the micro-nano structure layer 612; then, a PU material is coated on the coating layer 613, the fabric and the PU material are compounded to form an auxiliary leather layer 63 and a fabric layer 64, and finally, a foam 65 and a wear-resistant layer 66 are sequentially formed on the side, away from the micro-nano structure layer 612, of the embossed leather layer 52. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 7, the present invention discloses another optical leather 700, which comprises a support layer 78, a fabric layer 74, an auxiliary leather layer 73, an optical layer 71, an embossed leather layer 72, a foaming layer 75 and an abrasion resistant layer 76, which are sequentially stacked. The support layer 78 on the cloth layer 74 may be a plastic support, a glass support, a metal support, or the like, and may be a mesh support or a plate support. After the support layer 78 is arranged, the optical leather 70 is shaped, and the optical leather is suitable for the fields of electronic equipment shells (such as mobile phone rear covers), automobile interiors, packaging boxes, wall decorations and the like. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 8, the present invention discloses another optical leather 800, which includes a cloth layer 84, an auxiliary leather layer 83, an embossed leather layer 82, a base layer 811, and a micro-nano structure layer 812, which are sequentially stacked. The optical layer 81 is disposed on the visual side of the embossed leather layer 82, and the micro-nano structure layer 812 and the embossed leather layer 82 are disposed on two opposite sides of the base layer 811. The optical layer 81 is colored or colorless, and the transmittance thereof is more than 60%; in this embodiment, the micro-nano structure layer 812 includes a plurality of cylindrical mirrors arranged in an array, so that the leather surface of the optical leather 100 has a bright color or bright patterns, and has an excellent visual effect. In other embodiments, the optical layer covers the embossed leather layer in whole or in part, and the optical layer comprises a graphic layer, and presents colors or patterns, such as gradient colors or logos; or the optical layer comprises microimages and micro lenses, presents floating and/or sinking images and has anti-counterfeiting and decorative effects. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here.

Referring to fig. 9, the present invention discloses another optical leather 900, which comprises a conductive layer 99, an optical layer 91, an auxiliary leather layer 93, an embossed leather layer 94, a foaming layer 95 and an abrasion resistant layer 96, which are sequentially stacked. The optical layer 91 comprises a base layer 911, a micro-nano structure layer 912, a coating layer 913 and a coloring layer 914. The conductive layer 99 is disposed on a side of the colored layer 914 away from the plated layer 913, and the conductive layer 99 is formed by imprinting UV glue and curing to form a groove and then filling the groove, or formed by screen printing and coating, or formed by plating. The conductive layer 99 can be the optical leather 900 further having functionality, and the conductive layer 99 can realize functions of touch control, antenna, heating, lighting, shielding and the like, so that the optical leather 900 can better meet market demands. The layers not described in detail show the same layers as those described in the above embodiments, and are not described in detail here. In addition, it should be noted that in this embodiment, the conductive layer 99 is disposed on the colored layer 913, and in other embodiments, the conductive layer 99 may also be disposed between any two layers, for example, disposed on the other side of the base layer 911 away from the micro-nano structure layer 912, and at this time, the transparent rate of the conductive layer 99 may be set to be greater than 60% so as not to affect the display of the color, graphics, text, and the like of the optical leather 900. When the conductive layer 99 is disposed on the uppermost layer or one of the interlayers, the conductive layer can be electrically connected to a power source or other conductive circuits by exposing the leads from the side edges, or can be electrically connected by punching holes through the innermost layer. The conductive layer can be distributed on the whole surface of the embossed leather layer or be arranged locally, the conductive layer can be formed in a stamping and filling mode, and the whole surface of the conductive layer can be plated or coated with a conductive material or etched to form a conductive grid.

The invention discloses a novel non-natural leather which is provided with an optical layer, wherein the leather with optical effect is defined as optical leather, the color of the optical leather is more bright, clearer patterns can be arranged, the visual effect is more outstanding, and the anti-fake effect can also be achieved. Furthermore, a conducting layer can be arranged, so that the functions of touch control, antenna, heating, illumination, shielding and the like are realized, and the optical leather can better meet the market demand.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail. In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Moreover, 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 present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An optical leather, comprising:

2. The optical leather of claim 1, wherein the micro-nano structure layer comprises a plurality of micro-nano structures which are arranged in a protruding and/or recessed manner, and the optical layer further comprises a coating layer arranged on the micro-nano structure layer.

3. The optical leather according to claim 1, wherein the micro-nano structure layer comprises a plurality of micro-nano structures formed by stamping with colored curing glue or colorless curing glue, and the plurality of micro-nano structures are arranged in a protruding and/or recessed manner.

4. The optical leather of claim 2, wherein the optical layer further comprises a base layer, the micro-nano structure layer is arranged between the base layer and the coating layer, and the base layer is one of a PET layer, a PI layer, a CPI layer, a PC layer or a PMMA layer or a composite layer.

5. The optical leather of claim 4, wherein the optical layer further comprises a coloring layer for priming or auxiliary color development, and the coating layer is arranged between the micro-nano structure layer and the coloring layer.

6. An optical leather, comprising:

the optical layer, the optical layer set up in the inboard or the vision side of impressed watermark leather layer, the optical layer includes the picture and text layer that fills the material and form in the slot, picture and text layer display color and/or pattern.

7. The optical leather of claim 6, wherein the optical layer further comprises a base layer and a coating layer, the graphics layer being disposed between the base layer and the coating layer.

8. The optical leather of claim 1 or 6, further comprising a secondary leather layer disposed between the optical layer and the embossed leather layer, or the optical layer is disposed between the embossed leather layer and the secondary leather layer.

9. The optical leather of claim 8, wherein the embossed leather layer is made of a material comprising PU, PVC or TPU; the auxiliary leather layer is made of PU, PVC or TPU materials.

10. The optical leather of claim 8, further comprising a cloth layer, wherein the optical layer is disposed between the auxiliary leather layer and the cloth layer, or wherein the auxiliary leather layer is disposed between the optical layer and the cloth layer.

11. The optical leather of claim 8, further comprising a support or carrier layer for supporting other layers of the optical leather.

12. The optical leather of claim 8, further comprising a foam layer disposed on the viewing side of the embossed leather layer and an abrasion resistant layer overlying the foam layer; or the optical leather further comprises an abrasion resistant layer disposed on the viewing side of the embossed leather layer.