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WO2021212803A1 - 一种多彩变色膜 - Google Patents

一种多彩变色膜 Download PDF

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Publication number
WO2021212803A1
WO2021212803A1 PCT/CN2020/126053 CN2020126053W WO2021212803A1 WO 2021212803 A1 WO2021212803 A1 WO 2021212803A1 CN 2020126053 W CN2020126053 W CN 2020126053W WO 2021212803 A1 WO2021212803 A1 WO 2021212803A1
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WIPO (PCT)
Prior art keywords
layer
color
film
film layer
changing
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PCT/CN2020/126053
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English (en)
French (fr)
Inventor
朱昊枢
叶瑞
罗明辉
孙营春
左志成
陈林森
朱志坚
Original Assignee
苏州苏大维格科技集团股份有限公司
苏大维格(盐城)光电科技有限公司
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Publication of WO2021212803A1 publication Critical patent/WO2021212803A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0291—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time
    • G09F3/0294—Labels or tickets undergoing a change under particular conditions, e.g. heat, radiation, passage of time where the change is not permanent, e.g. labels only readable under a special light, temperature indicating labels and the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/41—Base layers supports or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
    • B41M5/42—Intermediate, backcoat, or covering layers
    • B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions

Definitions

  • the invention relates to the technical field of color-changing films, in particular to a colorful color-changing film.
  • the existing colorful color-changing film is bright and colorful. However, most of the current colorful color-changing films are transparent, and their surface color is relatively slight. In addition, the colorful color-changing film mostly uses a technology to present the color-changing effect, which is less difficult to imitate, and greatly reduces the anti-counterfeiting effect of the product.
  • the purpose of the present invention is to provide a colorful color-changing film with high anti-counterfeiting degree, which has a strong color-changing effect when the observation angle changes.
  • the present invention provides a colorful color-changing film, which includes a base film layer, a first film layer disposed on the surface of one side of the base film layer, and an organic layer disposed on the surface of the first film layer away from the base film layer.
  • a second film layer disposed on the surface of the organic layer on the side away from the first film layer, and a color layer disposed on the surface of the second film layer away from the organic layer, the first film layer ,
  • the organic layer and the second film layer form a slab waveguide resonance structure.
  • the color layer is provided with at least one color area.
  • the color region when the number of color regions is one, the color region is a full-color monochrome; when the number of color regions is multiple, different color regions are adjacent or spaced apart, So that the different color areas correspond to the patterns required by the product.
  • the color of the color region is black, and the colorful color-changing film appears green at an observation angle of 0°, and gradually transitions as the observation angle becomes larger.
  • the angle is 80°, it appears pinkish purple.
  • the thickness of the color layer is 0.1um-20um.
  • the thickness of the first film layer and the second film layer are both smaller than the thickness of the organic layer.
  • the base film layer is made of polyester base film
  • the organic layer is made of resin
  • the color layer is made of nano-scale ink
  • the first film layer is a transparent medium layer.
  • the second film layer is a transparent medium layer, wherein the material of the transparent medium layer is titanium dioxide or zinc sulfide, and the material of the semi-transparent and semi-reflective film layer is metallic chromium.
  • the colorful color-changing film further includes an information layer located between the first film layer and the base film layer or directly on the organic layer, and the information layer is provided with Micro-nano structure.
  • a hot melt adhesive layer for bonding with the hot-stamped object is fixedly laid on the color layer.
  • a release layer is provided between the base film layer and the first film layer, and the release layer is peeled off after the hot melt adhesive layer is combined with the hot-stamped object.
  • the colorful color-changing film provided by the present invention changes the original colors of the first film layer, the organic layer and the second transparent medium through the color layer provided on the surface of the second film layer away from the organic layer.
  • the colorful color-changing film has a richer and more complex color-changing effect; at the same time, the anti-counterfeiting effect of the colorful color-changing film is enhanced by superposition, and the anti-counterfeiting of the product is greatly improved.
  • FIG. 1 is a schematic diagram of the structure of a colorful color-changing film according to the first embodiment of the present invention
  • FIG. 2 is a reflection spectrum diagram of a slab waveguide resonant structure formed by a first transparent medium layer, an organic layer, and a second film layer in the first embodiment of the present invention
  • Fig. 3 is a reflection spectrum diagram after superimposing a black color layer at the same angle as Fig. 2;
  • FIG. 4 is a schematic diagram of the structure of the colorful color changing film according to the second embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the structure of a colorful color-changing film according to a third embodiment of the present invention.
  • FIG. 6 is a schematic view of the structure of the colorful color-changing film from another perspective according to the third embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of the colorful color changing film according to the fourth embodiment of the present invention.
  • the colorful color-changing film provided by the present invention includes a base film layer 1, a first film layer 2 fixed on the surface of the base film layer 1 side of the first film layer 2 away from the base film layer 1
  • 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 with a thickness of 12-100 ⁇ m.
  • the structure formed by the first film layer 2, the organic layer 3, and the second film layer 4 is a slab waveguide resonance structure based on the principle of slab waveguide resonance.
  • the resonant frequency will shift, making the colorful color changing film possess Color changing effect, so as to realize the expression of color. That is, standing wave resonance occurs when the incident wavelength changes at different observation angles, which realizes the color change, and achieves the effect of changing the color as the observation angle changes.
  • the first film layer 2 is a transparent medium layer or a semi-transparent and semi-reflective film layer
  • the second film layer 4 is a transparent medium layer.
  • the material of the transparent medium layer is preferably titanium dioxide or zinc sulfide, and a vacuum evaporation process is adopted; the thickness of both is 10nm-1um.
  • the material of the semi-transparent and semi-reflective film layer is preferably metallic chromium, which is formed by vacuum sputtering; the thickness is 10 nm to 1 um.
  • the material of the organic layer 3 is resin, and the material contains a diluent; the organic layer 3 is made by a nano-coating process, and its thickness is 10nm-10um.
  • the different materials or/and different thickness combinations of the first film layer 2, the organic layer 3, and the second film layer 4 can realize the expression of different colors.
  • the wavelength at which resonance is formed becomes longer, and as the viewing angle (incident angle) changes, the appearance of the color changes.
  • the color of the color layer 5 is dark, such as black, dark purple, dark blue, etc.; the thickness of the color layer 5 is 0.1 um to 20 um; preferably, the thickness is 1 um to 10 um.
  • the material of the color layer is nano-scale ink.
  • the superimposed color layer 5 absorbs colors of different wavelengths to change the wavelength of the final reflected light, thereby changing the color presented by the original slab waveguide resonant structure, achieving a strong (ie, darker color) color change effect, thereby enhancing the visual perception , Thereby enhancing the anti-counterfeiting effect; at the same time, it also makes the product finally show a complex color change effect after superposition.
  • the double superposition increases the difficulty of imitation, and greatly improves the anti-counterfeiting of the product.
  • the colorful color-changing film also includes an information layer 8 located between the first film layer 2 and the base film layer 1 or directly on the organic layer 3; a micro-nano structure 81 is provided on the surface of the information layer 8 on one side. It should be noted that when the surface of the information layer 8 on the side with the micro-nano structure 81 is in contact with the first film layer 2 or the second film layer 4, for example, the thickness of the first film layer 2 or the second film layer 4 is on the order of nanometers.
  • the surfaces on both sides of the first film layer 2 or the second film layer 4 follow the shape of the surface of the information layer 8 on the side with the micro-nano structure 81; for example, the thickness of the first film layer 2 or the second film layer 4 is micrometers Level, the surface on one side of the first film layer 2 or the second film layer 4 follows the shape of the surface on the side of the information layer 8 with the micro-nano structure 81, and the surface on the other side is flat.
  • 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.
  • the colorful color-changing film presents a dynamic laser effect.
  • the cross-sectional shape of the micro-nano structure 8 is different, and the light and shadow effects of the colorful color-changing film are also different.
  • the dynamic light and shadow of the opposite motion effect and the dynamic light and shadow of the light beam with the sand point effect.
  • the colorful color changing film provided by this embodiment 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 in order from top to bottom.
  • the surface of the information layer 8 on the side with the micro-nano structure 81 is in contact with the first film layer 2.
  • the base film layer 1 is made of a biaxially oriented polyester film with a thickness of 25um; the material of the first film layer is zinc sulfide, which is made by vacuum evaporation, and the thickness is 100nm; the material of the organic layer 3 is PMMA (Polymethylmethacrylate) (Methyl acrylate) resin, made by nano-coating process, with a thickness of 100nm; the material of the second film layer 4 is zinc sulfide, made by vacuum evaporation method, with a thickness of 100nm; the number of color layers is one, and the thickness of the color layer is 1 The color is black, made by nano-coating process, and the thickness is 2um.
  • the color expression is realized by designing the materials of each layer and the matching of different thicknesses. As the thickness increases, the wavelength at which resonance is formed becomes longer, and as the viewing angle (incident angle) changes, the displayed color changes.
  • the color changes at different viewing angles are as follows.
  • the wavelength in the figure represents the wavelength
  • Reflection represents the reflection efficiency. It can be seen that there are two peaks around 425nm (purple) and 550nm (green), and the peak intensities are equivalent. The final color of the product is the result of the superposition of the two, that is, pink purple.
  • the black color layer 5, that is, the slab waveguide resonance structure formed by the first film layer, the organic layer 3, and the second film layer 4, after being superimposed with the black color layer 5, changes the wavelength of the final reflected light.
  • the wavelength in the figure represents the wavelength
  • Reflection represents the reflection efficiency. It can be seen that there are two peaks around 425nm (purple) and 550nm (green). Compared with Figure 2, the intensity of the two peaks is weakened due to the absorption of the black layer, and the reduction is obvious at around 425nm (purple). , So that the main peak appears at around 550nm (green), and the product finally appears green.
  • the colorful color-changing film appears green at an observation angle of 0°, and gradually transitions as the observation angle becomes larger.
  • the observation angle is 80°, it appears pinkish-purple, that is, the colorful color-changing film of this embodiment finally presents a green-to-purple color-changing effect.
  • the final color of the product of this embodiment is the effect of multi-layer superposition, which greatly increases the difficulty of imitation and has extremely high anti-counterfeiting.
  • the difference between the colorful color changing film provided in this embodiment and the above-mentioned first embodiment is that, in this embodiment, the color layer 5 includes three color regions, and the color layer 5 includes first color regions 51, 51 and 51 respectively.
  • the second color area 52 and the third color area 53 have different colors in different color areas.
  • the color regions are hollowed out according to the product pattern design.
  • 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 desired pattern.
  • the hollowed-out part of the color layer 5 has a slab waveguide resonant structure composed of the first film layer, the organic layer 3, and the second film layer 4, and the color changes with the change of the viewing angle.
  • the part with the color area distribution is superimposed with the slab waveguide resonance structure composed of the first film layer, the organic layer 3, and the second film layer 4, presenting a significant color change effect.
  • the combination of the two can not only match the desired pattern of the product. Richer color graphic design increases the anti-counterfeiting strength of the product.
  • the difference between the colorful color changing film provided by this embodiment and the above-mentioned first embodiment lies in that, in this embodiment, the colorful color changing film adds a release layer 6 and a hot melt adhesive layer 7.
  • 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 the information layer on the side 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 to facilitate the peeling of the base film 1 after hot stamping. Therefore, the release layer 6 after peeling off the base film 1 can be the outermost layer of the entire colorful color changing film, and has the function of protecting the first dielectric layer 2; of course, the release layer 6 can also be used when peeling off the base film 1 as required Peel together.
  • the hot melt adhesive layer 7 is used to combine with the hot-stamped object, so that the colorful color-changing film becomes a colorful color-changing hot-stamping film. This kind of hot-stamping and colorful color-changing film can be widely used in various hot-stamping occasions, with simple operation, and high-efficiency in color change and anti-counterfeiting.
  • the difference between the colorful color changing film provided in this embodiment and the third embodiment is that, in this embodiment, the color layer 5 includes three color areas, including a first color area 51 and a second color area. 52 and the third color area 53 have different colors in different color areas.
  • This embodiment provides a colorful, color-changing hot stamping film with rich colors, strong design, and high anti-counterfeiting, which can be conveniently used in the hot stamping field.

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Abstract

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。

Description

一种多彩变色膜
本申请要求了申请日为2020年04月24日，申请号为202010332484.5的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及变色膜技术领域，特别是涉及一种多彩变色膜。
背景技术
现有的多彩变色膜是呈亮丽的色彩，颜色五彩斑斓。但是目前的多彩变色膜大都透明，其表面色彩较轻微，此外，多彩变色膜多采用一种技术呈现变色效果，仿制难度较低，大大降低了产品的防伪效果。
前面的叙述在于提供一般的背景信息，并不一定构成现有技术。
发明内容
本发明的目的在于提供一种防伪度高的多彩变色膜，在观察角度变化时，具有较强的变色效果。
本发明提供一种多彩变色膜，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。
在其中一实施例中，所述颜色层至少设有1个颜色区域。
在其中一实施例中，当所述颜色区域数量为1个时，所述颜色区域为满版单色；当所述颜色区域数量为多个时，不同的所述颜色区域相邻或者间隔，以使不同的所述颜色区域与产品需要的图案相对应配合。
在其中一实施例中，当所述颜色区域数量为1个时，所述颜色区域的颜色为黑色，多彩变色膜在0°观察角时呈现绿色，随着观察角度变大逐渐过 渡，当观察角为80°时呈现粉紫色。
在其中一实施例中，所述颜色层的厚度为0.1um～20um。
在其中一实施例中，所述第一膜层、所述第二膜层的厚度均小于所述有机层的厚度。
在其中一实施例中，所述基膜层的材质为聚酯基膜，所述有机层的材质为树脂，所述颜色层的材质为纳米级油墨，所述第一膜层为透明介质层或半透半反射膜层，所述第二膜层为透明介质层，其中，透明介质层的材质为二氧化钛或硫化锌，所述半透半反膜层的材质为金属铬。
在其中一实施例中，所述多彩变色膜还包括有信息层，所述信息层位于所述第一膜层与所述基膜层之间或直接设置在有机层上，所述信息层设有微纳结构。
在其中一实施例中，所述颜色层上固定铺设有用于与被烫印物体结合的热熔胶层。
在其中一实施例中，在所述基膜层与所述第一膜层之间设有离型层，所述离型层在所述热熔胶层与被烫印物体结合后剥离所述基膜层。
本发明提供的多彩变色膜，通过设置在所述第二膜层远离所述有机层一侧表面上的颜色层，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。
附图说明
图1为本发明第一实施例多彩变色膜的结构示意图；
图2为本发明第一实施例中第一透明介质层、有机层及第二膜层形成的平板波导共振结构的反射光谱图；
图3为与图2在同一角度下叠加黑色颜色层后的反射光谱图；
图4为本发明第二实施例多彩变色膜的结构示意图；
图5为本发明第三实施例多彩变色膜的结构示意图；
图6为本发明第三实施例多彩变色膜另一视角的结构示意图；
图7为本发明第四实施例多彩变色膜的结构示意图。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。以下实施例用于说明本发明，但不用来限制本发明的范围。
请参图1，本发明提供的多彩变色膜，包括基膜层1、固定在基膜层1一侧表面上的第一膜层2、设置在第一膜层2远离基膜层1一侧表面上的有机层3、设置在有机层3远离第一膜层2一侧表面上的第二膜层4，以及设置在第二膜层4远离有机层3一侧表面上的颜色层5。第一膜层2、有机层3和第二膜层4形成平板波导共振结构。
基膜层1为聚酯基膜，其厚度为12-100μm。
第一膜层2、有机层3、第二膜层4形成的结构以平板波导共振原理为基础形成的平板波导共振结构，由于在改变观察角度时，谐振频率会发生移动，使得多彩变色膜具备变色效果，从而实现颜色的表达。即，在不同观察角度入射波长变化发生驻波共振，实现颜色的变换，达到随着观察角度变化从而颜色发生变化的效果。
具体地，第一膜层2为透明介质层或半透半反膜层，第二膜层4为透明介质层。当第一膜层2和第二膜4层均为透明介质层时，透明介质层的材质优选为二氧化钛或硫化锌，采用真空蒸镀工艺；二者的厚度均为10nm～1um。当第一膜层2为半透半反膜层时，半透半反膜层的材质为优选为金属铬，通过真空溅射的方式形成；其厚度均为10nm～1um。有机层3的材质为树脂，其材质中含有稀释剂；有机层3采用纳米涂布工艺制作，其厚度为10nm～10um。
实际上，第一膜层2、有机层3、第二膜层4各层不同的材质或/和不同的厚度搭配可以实现不同的颜色的表达。随着厚度增大，形成共振的波长越长， 并且随着观察角度(入射角度)的变化，呈现的颜色发生变化。
颜色层5的颜色为深色，例如黑色、深紫色、深蓝色等；颜色层5的厚度为0.1um～20um；优选地，厚度为1um～10um。颜色层的材质为纳米级油墨。
通过叠加颜色层5吸收不同波长的颜色以改变了最终反射光的波长，从而改变了原本平板波导共振结构呈现的颜色，实现较强(即，颜色较深)的变色效果，从而增强了视觉感，进而增强了防伪效果；同时也使得产品最终呈现叠加后的复杂变色效果，双重叠加增加了仿制难度，极大的提高的产品的防伪性。
多彩变色膜还包括有信息层8，信息层8位于第一膜层2与基膜层1之间或直接设置在有机层3上；信息层8一侧的表面设置有微纳结构81。需要说明的是，当信息层8具有微纳结构81一侧的表面与第一膜层2或第二膜层4接触时，如第一膜层2或第二膜层4的厚度为纳米级，则第一膜层2或第二膜层4两侧的表面均随形于信息层8具有微纳结构81一侧的表面；如第一膜层2或第二膜层4的厚度为微米级，则第一膜层2或第二膜层4一侧的表面随形于信息层8具有微纳结构81一侧的表面，另一侧的表面平整。
具体地，微纳结构81的截面形状为弧形、三角形、正方形、矩形、梯形或不规则形，或为两种以上任意形状的组合。
由于信息层8上的微纳结构81，使多彩变色膜呈现动态镭射效果。同时微纳结构8的截面形状不同，多彩变色膜呈的光影效果也不同。如相向运动效果的动态光影、沙点效果的光柱动态光影。
下面，将结合具体实施方式对本发明的多彩变色膜的变色效果做详细介绍。
第一实施例
如图1所示，本实施例提供的多彩变色膜，由上向下依次包括基膜层1、信息层8、第一膜层2、有机层3、第二膜层4和颜色层5。信息层8具有微纳结构81一侧的表面与第一膜层2接触。
基膜层1采用厚度为25um的双向拉伸聚酯薄膜；第一膜层的材质为硫化锌，采用真空蒸镀方式制作，厚度为100nm；有机层3的材质为PMMA(Polymethyl methacrylate，聚甲基丙烯酸甲酯)树脂，采用纳米涂布工艺制作，厚度为100nm；第二膜层4的材质为硫化锌，采用真空蒸镀方式制作，厚度为100nm；颜色层数量为1个，颜色层的颜色为黑色，采用纳米涂布工艺制作，厚度为2um。
由于第一膜层、有机层3、第二膜层4形成的结构以平板波导共振原理为基础，通过设计各层材料以及不同的厚度搭配实现颜色的表达。随着厚度增大，形成共振的波长越长，并且随着观察角度(入射角度)的变化，呈现的颜色发生变化。
因此，在本实施例选定第一膜层、有机层3、第二膜层4的材料以及厚度情况下，不同观察角度的变化颜色的变化如下所述。
如图2所示，图中wavelength表示波长，Reflection表示反射效率。可以看到在425nm(紫色)和550nm(绿色)左右处呈现两处峰值，且峰值强度相当，产品最终呈现的颜色为两处叠加的结果，即粉紫色。
基于此设置的黑色颜色层5，即，第一膜层、有机层3、第二膜层4形成的平板波导共振结构在与黑色颜色层5叠加以后，改变了最终反射光的波长。如图3所示，图中wavelength表示波长，Reflection表示反射效率。可以看到在425nm(紫色)和550nm(绿色)左右处呈现两处峰值，相较于图2，由于黑色层的吸收，两处峰值强度均有减弱，且在425nm(紫色)左右处削减明显，使得在550nm(绿色)左右处呈现主要波峰，产品最终呈现出绿色。多彩变色膜在0°观察角时呈现绿色，随着观察角度变大逐渐过渡，当观察角为80°时呈现粉紫色，即本实施例多彩变色膜最终呈现绿色变紫色的变色效果。较未设置有颜色层的变色膜，本实施例产品最终颜色是多层叠加的效果，大大增加了仿造的难度，具有极高的防伪性。
第二实施例
如图4所示，本实施提供的多彩变色膜与上述第一实施例的区别在于，在本实施例中，颜色层5包括三个颜色区域，其中颜色层5分别包括第一颜色区域51、第二颜色区域52和第三颜色区域53，在不同的颜色区域中颜色不同。
本实施例中颜色区域根据产品图案设计镂空分布，第一颜色区域51是黑色，第二颜色区域52是深紫色，第三颜色区域53是深蓝色，并且颜色区域的分布与所需图案对应。
如图5所示，颜色层5镂空的部分由于有第一膜层，有机层3，第二膜层4三者构成的平板波导共振结构，也可以实现随着观察角度的变化颜色发生变化的效果，但是没有颜色层的叠加作用，呈现的较为微弱的变色效果。而具有颜色区域分布的部分与第一膜层、有机层3、第二膜层4三者构成的平板波导共振结构相叠加，呈现显著的变色效果，二者结合不仅可以配合产品所需图案实现更丰富的色彩图形设计，更增加了产品的防伪力度。
第三实施例
如图6所示，本实施提供的多彩变色膜与上述第一实施例的区别在于，在本实施例中，多彩变色膜增加离型层6和热熔胶层7。
具体地，离型层6固定铺设于基膜层1的下表面；信息层8设置在离型层6的下表面，且信息层具有微纳结构81一侧的表面与第一膜层2接触；热熔胶层7固定铺设于颜色层5的下表面。
离型层6用于在烫印后便于剥离基膜1。因此，剥离基膜1后的离型层6可处于整个多彩变色膜的最外层，具有保护第一介质层2的作用；当然，根据需要，在剥离基膜1时离型层6也可以一起剥离。热熔胶层7用于与被烫印物体结合，以使多彩变色膜成为多彩变色烫印膜。该种烫印多彩变色膜可广泛应用于各种可烫印场合，操作简便，变色防伪高效。
第四实施例
如图7所示，本实施提供的多彩变色膜与上述第三实施例的区别在于，在本实施例中，颜色层5包括三个颜色区域，分别包括第一颜色区域51、第二 颜色区域52和第三颜色区域53，在不同的颜色区域中颜色不同。本实施例提供一种色彩丰富，设计性强，防伪度高的可方便用于烫印领域的多彩变色烫印膜。
在附图中，为了清晰起见，会夸大层和区域的尺寸和相对尺寸。应当理解的是，当元件例如层、区域或基板被称作“形成在”、“设置在”或“位于”另一元件上时，该元件可以直接设置在所述另一元件上，或者也可以存在中间元件。相反，当元件被称作“直接形成在”或“直接设置在”另一元件上时，不存在中间元件。
在本文中，术语“上”、“下”、“前”、“后”、“左”、“右”、“顶”、“底”、“内”、“外”、“竖直”、“水平”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了表达技术方案的清楚及描述方便，因此不能理解为对本发明的限制。
在本文中，用于描述元件的序列形容词“第一”、“第二”等仅仅是为了区别属性类似的元件，并不意味着这样描述的元件必须依照给定的顺序，或者时间、空间、等级或其它的限制。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，除了包含所列的那些要素，而且还可包含没有明确列出的其他要素。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (10)

  1. 一种多彩变色膜，其特征在于，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。
  2. 如权利要求1所述的多彩变色膜，其特征在于，所述颜色层至少设有1个颜色区域。
  3. 如权利要2所述的多彩变色膜，其特征在于，当所述颜色区域数量为1个时，所述颜色区域为满版单色；当所述颜色区域数量为多个时，不同的所述颜色区域相邻或者间隔，以使不同的所述颜色区域与产品需要的图案相对应配合。
  4. 如权利要求2所述的多彩变色膜，其特征在于，当所述颜色区域数量为1个时，所述颜色区域的颜色为黑色，多彩变色膜在0°观察角时呈现绿色，随着观察角度变大逐渐过渡，当观察角为80°时呈现粉紫色。
  5. 如权利要求1所述的多彩变色膜，其特征在于，所述颜色层的厚度为0.1um～20um。
  6. 如权利要求5所述的多彩变色膜，其特征在于，所述第一膜层、所述第二膜层的厚度均小于所述有机层的厚度。
  7. 如权利要求1所述的多彩变色膜，其特征在于，所述基膜层的材质为聚酯基膜，所述有机层的材质为树脂，所述颜色层的材质为纳米级油墨，所述第一膜层为透明介质层或半透半反射膜层，所述第二膜层为透明介质层，其中，透明介质层的材质为二氧化钛或硫化锌，所述半透半反膜层的材质为金属铬。
  8. 如权利要求1所述的多彩变色膜，其特征在于，所述多彩变色膜还包括有信息层，所述信息层位于所述第一膜层与所述基膜层之间或直接设置在有机层上，所述信息层设有微纳结构。
  9. 如权利要求1所述的多彩变色膜，其特征在于，所述颜色层上固定铺 设有用于与被烫印物体结合的热熔胶层。
  10. 如权利要求9所述的多彩变色膜，其特征在于，在所述基膜层与所述第一膜层之间设有离型层，所述离型层在所述热熔胶层与被烫印物体结合后剥离所述基膜层。
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