阅读说明：本技术 一种多彩变色膜 (Colorful color-changing film ) 是由 朱昊枢 叶瑞 罗明辉 孙营春 左志成 陈林森 朱志坚 于 2020-04-24 设计创作，主要内容包括：本发明公开了一种多彩变色膜,包括基膜层、设置在所述基膜层一侧表面的第一膜层、设置在所述第一膜层远离所述基膜层一侧表面的有机层、设置在所述有机层远离所述第一膜层一侧表面的第二膜层,以及设置在所述第二膜层远离所述有机层一侧表面的颜色层,所述第一膜层、所述有机层和所述第二膜层形成平板波导共振结构。通过上述结构,改变了原本第一膜层、有机层和第二透明介质所呈现的颜色,使得多彩变色膜具有更为丰富、复杂的变色效果；同时,通过叠加增强了多彩变色膜的防伪效果,极大地提高了产品的防伪性。(The invention discloses a colorful color-changing film which comprises a base film layer, a first film layer arranged on one side surface of the base film layer, an organic layer arranged on one side surface of the first film layer far away from the base film layer, a second film layer arranged on one side surface of the organic layer far away from the first film layer, and a color layer arranged on one side surface of the second film layer far away from the organic layer, wherein the first film layer, the organic layer and the second film layer form a slab waveguide resonance structure. Through the structure, the colors of the first film layer, the organic layer and the second transparent medium are changed, so that the colorful color-changing film has richer and more complicated color-changing effects; meanwhile, the anti-counterfeiting effect of the colorful color-changing film is enhanced through superposition, and the anti-counterfeiting performance of the product is greatly improved.)

1. The utility model provides a colorful color-changing film, its characterized in that is in including base film layer, setting base film layer side surface's first rete, setting are in first rete is kept away from base film layer side surface's organic layer, setting are in organic layer is kept away from the second rete of first rete side surface, and set up the second rete is kept away from the colour layer of organic layer side surface, first rete organic layer with the second rete forms slab waveguide resonance structure.

2. A multicolor color shifting film according to claim 1, wherein said color layer is provided with at least 1 color region.

3. A multicolor color-changing film according to claim 2, wherein when the number of said color regions is 1, said color regions are full monochrome; when the number of the color areas is multiple, different color areas are adjacent or spaced, so that the different color areas are correspondingly matched with the needed patterns of the product.

4. A multicolor shifting film according to claim 2, wherein when the number of said color regions is 1, the color of said color regions is black, and said multicolor shifting film exhibits green color at an observation angle of 0 °, gradually transits as the observation angle becomes larger, and exhibits pink-violet color at an observation angle of 80 °.

5. A multicolor color changing film according to claim 1, wherein said color layer has a thickness of 0.1 to 20 um.

6. A multicolor shading film according to claim 5, wherein the thickness of each of said first and second film layers is less than the thickness of said organic layer.

7. A multicolor discoloration film according to claim 1, wherein said base film layer is made of polyester base film, said organic layer is made of resin, said color layer is made of nano-ink, said first film layer is made of transparent dielectric layer or semi-transparent semi-reflective film layer, said second film layer is made of transparent dielectric layer, said transparent dielectric layer is made of titanium dioxide or zinc sulfide, and said semi-transparent semi-reflective film layer is made of chromium metal.

8. The multicolor discoloration film according to claim 1, further comprising an information layer, wherein said information layer is disposed between said first film layer and said base film layer or directly disposed on the organic layer, and said information layer has a micro-nano structure.

9. A colorful color-changing film as claimed in claim 1, wherein a hot-melt adhesive layer is fixedly laid on the color layer for combining with a stamped object.

10. A multicolor discoloration film according to claim 9, wherein a release layer is provided between said base film layer and said first film layer, and said release layer peels off said base film layer after said hot-melt adhesive layer is bonded to the object to be hot-stamped.

Technical Field

The invention relates to the technical field of color-changing films, in particular to a colorful color-changing film.

Background

The existing colorful color-changing film is bright and colorful. However, most of the existing colorful color-changing films are transparent, the surface color of the existing colorful color-changing films is slight, in addition, the colorful color-changing films mostly adopt one technology to present the color-changing effect, the imitation difficulty is low, and the anti-counterfeiting effect of the product is greatly reduced.

The foregoing description is provided for general background information and is not admitted to be prior art.

Disclosure of Invention

The invention aims to provide a colorful color-changing film with high anti-counterfeiting degree, which has strong color-changing effect when the observation angle is changed.

The invention provides a colorful color-changing film which comprises a base film layer, a first film layer arranged on one side surface of the base film layer, an organic layer arranged on one side surface of the first film layer far away from the base film layer, a second film layer arranged on one side surface of the organic layer far away from the first film layer, and a color layer arranged on one side surface of the second film layer far away from the organic layer, wherein the first film layer, the organic layer and the second film layer form a slab waveguide resonance structure.

In one embodiment, the color layer has at least 1 color region.

In one embodiment, when the number of the color areas is 1, the color areas are full-page single colors; when the number of the color areas is multiple, different color areas are adjacent or spaced, so that the different color areas are correspondingly matched with the needed patterns of the product.

In one embodiment, when the number of the color areas is 1, the color of the color areas is black, the multicolor color-changing film is green at an observation angle of 0 degrees, gradually transits along with the increase of the observation angle, and is pink-purple when the observation angle is 80 degrees.

In one embodiment, the thickness of the color layer is 0.1um to 20 um.

In one embodiment, the thickness of each of the first film layer and the second film layer is smaller than the thickness of the organic layer.

In one embodiment, the base film layer is a polyester base film, the organic layer is resin, the color layer is nano-ink, the first film layer is a transparent dielectric layer or a semi-transparent and semi-reflective film layer, the second film layer is a transparent dielectric layer, the transparent dielectric layer is titanium dioxide or zinc sulfide, and the semi-transparent and semi-reflective film layer is chromium metal.

In one embodiment, the multicolor color-changing film further comprises an information layer, the information layer is located between the first film layer and the base film layer or directly arranged on the organic layer, and the information layer is provided with a micro-nano structure.

In one embodiment, a hot melt adhesive layer used for being combined with a hot stamped object is fixedly laid on the color layer.

In one embodiment, a release layer is disposed between the base film layer and the first film layer, and the release layer peels off the base film layer after the hot melt adhesive layer is combined with the object to be hot stamped.

According to the colorful color-changing film provided by the invention, the color layers arranged on the surface of the second film layer far away from the organic layer change the colors originally presented by the first film layer, the organic layer and the second transparent medium, so that the colorful color-changing film has richer and more complex color-changing effects; meanwhile, the anti-counterfeiting effect of the colorful color-changing film is enhanced through superposition, and the anti-counterfeiting performance of the product is greatly improved.

Drawings

FIG. 1 is a schematic structural diagram of a color changing film according to a first embodiment of the present invention;

FIG. 2 is a reflection spectrum of a slab waveguide resonant structure formed by a first transparent dielectric layer, an organic layer and a second layer according to a first embodiment of the present invention;

FIG. 3 is a reflection spectrum of the black color layer superimposed at the same angle as FIG. 2;

FIG. 4 is a schematic structural diagram of a color changing film according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a color changing film according to a third embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a color changing film according to a third embodiment of the present invention;

fig. 7 is a schematic structural view of a color changing film according to a fourth embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1, the color-changing film provided by the present invention includes a base film layer 1, a first film layer 2 fixed on a surface of one side of the base film layer 1, an organic layer 3 disposed on a surface of one side of the first film layer 2 away from the base film layer 1, a second film layer 4 disposed on a surface of one side of the organic layer 3 away from the first film layer 2, and a color layer 5 disposed on a surface of one side of the second film layer 4 away from the organic layer 3. The first film layer 2, the organic layer 3 and the second film layer 4 form a slab waveguide resonance structure.

The base film layer 1 is a polyester base film and has a thickness of 12-100 μm.

The structure that first rete 2, organic layer 3, second rete 4 formed uses the slab waveguide resonance structure that slab waveguide resonance principle formed as the basis, because when changing observation angle, resonant frequency can take place to remove for colorful color-changing membrane possesses the effect of discolouing, thereby realizes the expression of colour. Namely, standing wave resonance occurs when the incident wavelength changes at different observation angles, so that the color is changed, and the effect that the color changes along with the change of the observation angle is achieved.

Specifically, the first film layer 2 is a transparent dielectric layer or a semi-transparent semi-reflective film layer, and the second film layer 4 is a transparent dielectric layer. When the first film layer 2 and the second film layer 4 are both transparent dielectric layers, the transparent dielectric layers are preferably made of titanium dioxide or zinc sulfide, and a vacuum evaporation process is adopted; the thickness of both is 10 nm-1 um. When the first film layer 2 is a semi-transparent semi-reflective film layer, the material of the semi-transparent semi-reflective film layer is preferably metal chromium, and the semi-transparent semi-reflective film layer is formed in a vacuum sputtering mode; the thickness of the film is 10 nm-1 um. The organic layer 3 is made of resin and contains a diluent; the organic layer 3 is made by adopting a nano coating process, and the thickness of the organic layer is 10 nm-10 um.

In fact, different materials and/or different thickness combinations of the first film layer 2, the organic layer 3, and the second film layer 4 can realize different color expressions. As the thickness increases, the longer the wavelength at which resonance is formed, and as the observation angle (incident angle) changes, the color that appears changes.

The color of the color layer 5 is dark color, such as black, dark purple, dark blue, etc.; the thickness of the color layer 5 is 0.1 um-20 um; preferably, the thickness is 1um to 10 um. The color layer is made of nano-grade ink.

The color of different wavelengths is absorbed by the superposed color layer 5 to change the wavelength of the final reflected light, so that the color presented by the original slab waveguide resonance structure is changed, and a stronger (i.e. darker) color change effect is realized, so that the visual sense is enhanced, and the anti-counterfeiting effect is further enhanced; meanwhile, the product finally shows a complex color-changing effect after superposition, the double superposition increases the imitation difficulty, and the anti-counterfeiting performance of the product is greatly improved.

The multicolor color-changing film also comprises an information layer 8, and the information layer 8 is positioned between the first film layer 2 and the base film layer 1 or is directly arranged on the organic layer 3; a micro-nano structure 81 is provided on the surface of one side of the information layer 8. It should be noted that, when the surface of the information layer 8 having the micro-nano structure 81 contacts the first film layer 2 or the second film layer 4, if the thickness of the first film layer 2 or the second film layer 4 is nanometer, the surfaces of the two sides of the first film layer 2 or the second film layer 4 are formed on the surface of the information layer 8 having the micro-nano structure 81; if the thickness of the first film layer 2 or the second film layer 4 is micron-sized, the surface of one side of the first film layer 2 or the second film layer 4 is formed along with the surface of one side of the information layer 8 having the micro-nano structure 81, and the surface of the other side is flat.

Specifically, the cross-sectional shape of the micro-nano structure 81 is an arc, a triangle, a square, a rectangle, a trapezoid, or an irregular shape, or a combination of two or more arbitrary shapes.

Due to the micro-nano structure 81 on the information layer 8, the colorful color-changing film presents a dynamic laser effect. Meanwhile, the cross section shapes of the micro-nano structures 8 are different, and the light and shadow effects of the colorful color-changing film are also different. Such as dynamic light shadow of opposite movement effect and light column dynamic light shadow of sand point effect.

Hereinafter, the color-changing effect of the multicolor color-changing film of the present invention will be described in detail with reference to specific embodiments.

First embodiment

As shown in fig. 1, the color changing film provided in this embodiment sequentially includes a base film layer 1, an information layer 8, a first film layer 2, an organic layer 3, a second film layer 4, and a color layer 5 from top to bottom. The surface of the information layer 8 having the micro-nano structure 81 is in contact with the first film layer 2.

The base film layer 1 is a biaxially oriented polyester film with the thickness of 25 um; the first film layer is made of zinc sulfide in a vacuum evaporation mode, and the thickness of the first film layer is 100 nm; the organic layer 3 is made of PMMA (Polymethyl methacrylate) resin and is manufactured by a nano coating process, and the thickness is 100 nm; the second film layer 4 is made of zinc sulfide in a vacuum evaporation mode, and the thickness is 100 nm; the quantity of color layer is 1, and the color on color layer is black, adopts nanometer coating process preparation, and thickness is 2 um.

Because the structure formed by the first film layer, the organic layer 3 and the second film layer 4 is based on the slab waveguide resonance principle, the color expression is realized by designing materials of each layer and matching different thicknesses. As the thickness increases, the longer the wavelength at which resonance is formed, and as the observation angle (incident angle) changes, the color that appears changes.

Therefore, in the case of selecting the materials and thicknesses of the first film layer, the organic layer 3, and the second film layer 4 in the present embodiment, the color change at different viewing angles is as follows.

As shown in fig. 2, wavelength represents the wavelength, and Reflection represents the Reflection efficiency. Two peaks are seen around 425nm (purple) and 550nm (green), and the peak intensities are equivalent, and the final color of the product is the result of two superimposed positions, namely pink purple.

The black color layer 5 provided based on this, that is, the slab waveguide resonant structure formed by the first film layer, the organic layer 3, and the second film layer 4, changes the wavelength of the finally reflected light after being superimposed on the black color layer 5. As shown in fig. 3, wavelength indicates the wavelength, and Reflection indicates the Reflection efficiency. It can be seen that two peaks appear around 425nm (purple) and 550nm (green), compared with fig. 2, the intensity of the two peaks is weakened due to the absorption of the black layer, and the reduction is obvious around 425nm (purple), so that a main peak appears around 550nm (green), and the product finally appears green. The colorful color-changing film is green when the observation angle is 0 degrees, gradually transits along with the increase of the observation angle, and is pink purple when the observation angle is 80 degrees, namely, the colorful color-changing film of the embodiment finally has the color-changing effect of changing green into purple. Compared with a color-changing film without a color layer, the final color of the product of the embodiment is the effect of multilayer superposition, the difficulty of imitation is greatly increased, and the anti-counterfeiting performance is extremely high.

Second embodiment

As shown in fig. 4, the present embodiment provides a multicolor color changing film which is different from the first embodiment described above in that, in the present embodiment, the color layer 5 includes three color regions, wherein the color layer 5 includes a first color region 51, a second color region 52, and a third color region 53, respectively, and the colors are different in different color regions.

In the embodiment, the color regions are designed to be in hollow distribution according to the product pattern, the first color region 51 is black, the second color region 52 is dark purple, the third color region 53 is dark blue, and the distribution of the color regions corresponds to the required pattern.

As shown in fig. 5, the hollowed-out portion of the color layer 5 has a slab waveguide resonance structure formed by the first film layer, the organic layer 3, and the second film layer 4, so that the effect of color change along with the change of the observation angle can be realized, but the color layer has no superposition effect, and the color change effect is relatively weak. And the part that has the regional distribution of colour superposes with the slab waveguide resonance structure that first rete, organic layer 3, 4 three of second rete, presents apparent discoloration effect, and the two combines not only can cooperate the required pattern of product to realize abundanter color graphic design, has more increased the anti-fake dynamics of product.

Third embodiment

As shown in fig. 6, the present embodiment provides a color-changing film which is different from the first embodiment in that a release layer 6 and a hot melt adhesive layer 7 are added to the color-changing film in the present embodiment.

Specifically, the release layer 6 is fixedly laid on the lower surface of the base film layer 1; the information layer 8 is arranged on the lower surface of the release layer 6, and the surface of one side of the information layer with the micro-nano structure 81 is in contact with the first film layer 2; the hot melt adhesive layer 7 is fixedly laid on the lower surface of the color layer 5.

The release layer 6 is used for facilitating the peeling of the base film 1 after hot stamping. Therefore, the release layer 6 after peeling the base film 1 can be positioned at the outermost layer of the whole colorful color-changing film, and has the function of protecting the first medium layer 2; of course, the release layer 6 may be peeled off together when peeling the base film 1, as necessary. The hot melt adhesive layer 7 is used for being combined with a hot stamped object so that the colorful color-changing film becomes a colorful color-changing hot stamping film. The hot stamping colorful color-changing film can be widely applied to various hot stamping occasions, is simple and convenient to operate, and is high in color-changing anti-counterfeiting efficiency.

Fourth embodiment

As shown in fig. 7, the present embodiment provides a multicolor color changing film which is different from the third embodiment described above in that, in the present embodiment, the color layer 5 includes three color regions including a first color region 51, a second color region 52, and a third color region 53, respectively, and the colors are different in the different color regions. The embodiment provides a colorful thermoprinting membrane that discolours that rich in colors, designability is strong, and anti-fake degree is high can conveniently be used for the thermoprinting field.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on," "disposed on" or "located on" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.

As used herein, the ordinal adjectives "first", "second", etc., used to describe an element are merely to distinguish between similar elements and do not imply that the elements so described must be in a given sequence, either temporally, spatially, in ranking, or in any other manner.

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.

As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.