WO2017201665A1 - 一种防伪反射片及其制备方法 - Google Patents

一种防伪反射片及其制备方法 Download PDF

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Publication number
WO2017201665A1
WO2017201665A1 PCT/CN2016/083103 CN2016083103W WO2017201665A1 WO 2017201665 A1 WO2017201665 A1 WO 2017201665A1 CN 2016083103 W CN2016083103 W CN 2016083103W WO 2017201665 A1 WO2017201665 A1 WO 2017201665A1
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WO
WIPO (PCT)
Prior art keywords
layer
counterfeit
clamping
counterfeiting
focus forming
Prior art date
Application number
PCT/CN2016/083103
Other languages
English (en)
French (fr)
Inventor
蒋纪辉
韩剑钧
陈燕
邵卫东
Original Assignee
恩希爱（杭州）薄膜有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 恩希爱（杭州）薄膜有限公司 filed Critical 恩希爱（杭州）薄膜有限公司
Priority to PCT/CN2016/083103 priority Critical patent/WO2017201665A1/zh
Priority to CN201680085458.9A priority patent/CN109313293B/zh
Publication of WO2017201665A1 publication Critical patent/WO2017201665A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix

Definitions

  • the invention relates to a reflective material, and more particularly to an anti-counterfeit reflection sheet and a preparation method thereof.
  • Reflective sheets are widely used in automobile license plates, road signs and certification labels because of their excellent nighttime visibility.
  • counterfeit products there are many counterfeit products on the market at the same time, and there is also a lack of necessary anti-counterfeiting measures.
  • Many researchers are studying reflective sheets with various anti-counterfeiting technologies or some anti-counterfeiting technologies have been used to prevent counterfeit products from appearing,
  • the technical means of anti-counterfeiting products are relatively simple, such as laser watermarking, which often leads to the product being easily copied.
  • some advanced anti-counterfeiting technologies have appeared, they often require specialized equipment and professional skills to be identified, which invisibly consumes The identification of the person sets the threshold, which is not conducive to promotion.
  • Patent application discloses 'a retroreflective sheeting provided with a printed image by regularly arranging optical element array sheets of a plurality of optical elements having light transmissivity at a certain position, ie via a lenticular lens
  • the sheet or the lenticular lens array sheet can express the stereoscopic image when observing the printed image, thereby achieving the purpose of anti-counterfeiting, although the anti-counterfeiting technology of the invention is complicated, and does not require professional equipment, and can be recognized without professional skills.
  • the latent image is disposed between the surface layer and the next layer, which is equivalent to being disposed on the printing layer, on the one hand, it is impossible to change the observation angle, and the anti-counterfeiting mark is changed, and on the other hand, it is easily falsified, and When the reflector is removed, it can be used continuously, and it cannot achieve anti-counterfeiting, tamper-proof and anti-reuse purposes.
  • the object of the present invention is to overcome the deficiencies of the prior art and to provide a Anti-counterfeiting, tamper-proof and anti-counterfeit reflectors for re-use, and a method for preparing the anti-counterfeit reflector.
  • An anti-counterfeit reflection sheet comprising a surface protection layer, a clamping layer, a security coloring layer, a focus forming layer, a specular reflection layer, an adhesive layer and a protective paper, which are sequentially connected from top to bottom, between the anti-counterfeiting color layer and the clamping layer
  • the transmissive layer is provided, and the transmissive layer is a lens array combination structure composed of glass microbeads, the upper part of the glass microbeads enters into the clamping layer, and the lower part passes through the anti-counterfeiting colored layer and is connected with the focus forming layer, and the anti-counterfeiting colored layer and the clamping layer are
  • the layer portions are in contact with each other, and the surface protective layer, the clamping layer and the focus forming layer are each composed of a film-like resin having a light transmitting property, the anti-counterfeiting colored layer is composed of a pigment or a resin, and the specular reflective layer is a metal reflective film, and the
  • the anti-counterfeit colored layer is composed of a light-transmitting pigment or resin, and the thickness of the anti-counterfeit colored layer is 0.1% to 10% of the thickness of the transmission layer. While the glass beads exceed half of the thickness into the clamping layer, the filling rate of the glass beads in the clamping layer is 60% to 90%.
  • the anti-counterfeiting colored layer is formed by coating, and the coating method includes gravure coating, photo inkjet coating, screen printing coating, and the coating thickness is less than 1 ⁇ m. .
  • the film-like resin of the surface protective layer, the clamping layer, and the focus forming layer are each selected from at least one of an acrylic resin, an alkyd resin, a fluororesin, a vinyl chloride resin, a polyester, a polyurethane resin, and a polycarbonate, in consideration of weather resistance and
  • the workability is preferably at least one of an acrylic resin, a polyester, and a vinyl chloride resin, and an acrylic resin is preferable in view of suitability at the time of coloring or dispersibility of a colorant at the time of coloring.
  • the anti-counterfeiting colored layer is composed of a powdery pigment, and at least one of the surface protective layer, the clamping layer and the focus forming layer is colored by a coloring agent, and the color of at least one of the surface protective layer, the clamping layer and the focus forming layer is
  • the anti-counterfeit colored layer is the same, and the development effect is further considered, and the surface protective layer is preferably colorless and transparent.
  • the anti-counterfeiting coloring layer is composed of an organic pigment or an inorganic pigment, wherein the organic pigment is selected from one of an azo pigment and a phthalocyanine pigment, and the inorganic pigment is selected from the group consisting of a metal oxide pigment, an iron ferrocyanide pigment, an ultraviolet luminescent coloring agent, One of the luminescent luminescent colorants.
  • the anti-counterfeiting colored layer is composed of a film-like resin selected from at least one of an acrylic resin, an alkyd resin, a fluororesin, a vinyl chloride resin, a polyester, a polyurethane resin, and a polycarbonate.
  • a silicone resin or a norbornene resin may be added to the pigment or resin constituting the pseudo-coloring layer in an amount of 0.1 to 90% by weight of the original anti-counterfeiting color layer pigment or resin, wherein the silicone resin
  • the density is 0.99 g/cm 3
  • the viscosity is 128 mm 2 /s
  • the density of the norbornene resin is 1 to 1.1 g/cm 3 .
  • the transmissive layer is composed of a glass bead array, wherein the glass microbeads are composed of at least one of glass, ceramic, polymer, ore, and the glass microbeads have any shape having a refractive function, preferably a spheroid.
  • An anti-counterfeit reflective sheet comprising the following steps:
  • the reflective sheet of the present invention is provided with an anti-counterfeit colored layer, and an anti-counterfeit mark such as a pattern, a character, a watermark, or a separate color is disposed on the anti-counterfeit colored layer, and the anti-counterfeit mark can be changed as the observation angle changes, and the inverse Anti-counterfeit marks such as patterns, characters, watermarks, or individual colors set on the anti-counterfeit colored layer when reflected or illuminated by the flash are not visible, thereby having an anti-counterfeiting effect.
  • an anti-counterfeit mark such as a pattern, a character, a watermark, or a separate color
  • FIG. 1 is a diagram of a layered structure provided by an embodiment of the present invention.
  • 1- surface protective layer 2-printed layer, 3-clamped layer, 4-transmissive layer, 5-anti-counterfeiting layer, 6- Focus forming layer, 7-specular reflective layer, 8-adhesive layer, 9-protective paper.
  • an anti-counterfeit reflective sheet includes a surface protective layer 1 , a clamping layer 3 , and a security coloring layer 5 in this order from bottom to bottom. a focus forming layer 6 and a specular reflective layer 7 , and a transmissive layer is disposed between the anti-counterfeiting colored layer and the clamping layer 4
  • the transmissive layer is a lens array combination structure composed of glass microbeads, the upper part of the glass microbeads enters into the clamping layer, and the lower part passes through the anti-counterfeiting colored layer and is in contact with the focus forming layer, and the anti-counterfeiting colored layer is in contact with the clamping layer part.
  • the surface protective layer, the sandwich layer, and the focus forming layer are each composed of a flat film-like resin having a light transmitting property, the anti-counterfeiting colored layer is composed of a pigment or a resin, and the specular reflective layer is a metal reflective film.
  • Reflective sheet 1 The combination of the clamping layer 3, the transmission layer 4, the anti-counterfeiting layer 5, the focus forming layer 6 and the specular reflection layer 7 can perform the functions of reflection and anti-counterfeiting, and in order to facilitate the pasting and protection, the specular reflection layer can be used.
  • the surface of the layer 7 is provided with an adhesive layer 8 while providing protection on the surface of the adhesive layer 8.
  • the film-like resin includes at least one of an acrylic resin, an alkyd resin, a fluororesin, a vinyl chloride resin, a polyester, a polyurethane resin, and a polycarbonate, and from the viewpoints of weather resistance and workability, an acrylic resin, a polyester, and a chlorine A vinyl resin is more suitable; if considering the suitability at the time of coloring or the dispersibility of a coloring agent at the time of coloring, an acrylic resin is more suitable. Further, in order to improve other properties of the surface protective layer, additives such as an ultraviolet absorber, a stabilizer, a plasticizer, and a bridging agent may be added to the resin as needed.
  • the surface protective layer can be colored or colorless and transparent, and colorless and transparent is preferred, and the dyeing can also meet the requirements.
  • Colored pigments or dyes are as follows:
  • Yellow an isoindolinone, an isoporphyrin system, a quinophthalone, an anthraquinone, a pyrazolone, a flavanone, a benzimidazolone, an azo nickel or the like; Red: lanthanide, perylene, quinacridone, anthraquinone, etc.; blue: phthalocyanine, genus reduction, lanthanide, cobalt, etc.; green coloring agent Department, emerald system, chrome oxide system, cadmium system, etc.; brown: iron oxide coloring agent, or isoketone yellow coloring agent, perylene red coloring agent and phthalocyanine blue coloring agent.
  • Monochrome has an anthraquinone, a pyrazolone, a purple ketone, a perylene, a quinacone, or an isonone-based yellow coloring agent and a perylene-based red coloring.
  • Agent white: lanthanide, zinc-based, lead-based colorant; black: carbon black, aniline black, perylene black, titanium black.
  • the resin constituting the surface protective layer can be applied to the sandwich layer 3 and the anti-counterfeit color layer 5, and the anti-counterfeit color layer can also be composed of powdery pigment.
  • the anti-counterfeiting coloring layer is composed of an organic pigment or an inorganic pigment, wherein the organic pigment is selected from one of an azo pigment and a phthalocyanine pigment, and the inorganic pigment is selected from the group consisting of a metal oxide pigment, an iron ferrocyanide pigment, an ultraviolet luminescent coloring agent, One of the luminescent luminescent colorants.
  • Ultraviolet light-emitting colorants include alkaline earth aluminate, sulfurized metal, silicon and other ultraviolet light-emitting colorants.
  • the light-storing luminescent coloring agent includes a light-storing luminescent coloring agent such as an alkaline earth aluminate or a sulfide metal. Further, the coloring agent of the surface protective layer can also be used as a powdery pigment. In addition, in order to prevent the tamper-evident sheet from being tampered after use, it can be added to the raw material of the anti-counterfeit coloring layer. When the anti-counterfeit reflective sheet is peeled off, the anti-counterfeit colored layer is separated from the sandwich layer and the peeling microbead layer to prevent the anti-counterfeit sheet from being improved.
  • a light-storing luminescent coloring agent such as an alkaline earth aluminate or a sulfide metal.
  • the coloring agent of the surface protective layer can also be used as a powdery pigment.
  • it in order to prevent the tamper-evident sheet from being tampered after use, it can be added to the raw material of the anti-counter
  • a transmission layer is disposed between the clamping layer 3 and the anti-counterfeiting color layer 5
  • the transmissive layer is composed of a glass bead array, wherein the glass microbeads are composed of at least one of glass, ceramic, polymer, ore, and the glass microbeads have any shape having a refractive function, such as a spheroid or a hemisphere. More than half of the thickness of the glass beads enters the clamping layer, with the upper and lower heights of the glass beads being the thickness, and the glass beads are inserted into the clamping layer at a height of more than half.
  • the filling ratio of the glass beads in the clamping layer is 60 ⁇ 90%
  • the thickness of the anti-counterfeiting colored layer is 0.1 ⁇ 10% of the thickness of the transmission layer
  • the thickness of the anti-counterfeiting colored layer is controlled to 0.1% or more of the thickness of the transmission layer 4 to obtain more sufficient color development, and the control is 10% or less can get more full color change effect, so that the anti-counterfeiting effect can be well played.
  • the anti-counterfeiting colored layer is formed by coating, and the coating thickness is less than 1 ⁇ m as long as the coating thickness can be controlled at 1 ⁇ m. Suitable for coating methods such as gravure coating, photo inkjet coating, screen printing coating, etc. . Since the colored layer is in the product, the pattern or watermark applied on the anti-counterfeit colored layer is irreversible and cannot be removed by solvent wiping.
  • Focus forming layer 6 In contact with the glass beads, the glass beads also fix the focus forming layer, and the focus forming layer is used to adjust the distance from the surface of the micro glass sphere to the specular reflection, and the resin constituting the protective surface layer can be used for the focus forming layer.
  • the focus is formed so as to be colored in the same manner as the surface protective layer.
  • Specular reflection layer 7 It is a layered structure composed of a metal such as aluminum, copper or silver, and is formed, for example, by vacuum evaporation.
  • the specularly reflective layer is spaced apart by a distance from the focus forming layer and forms a reflective area on the surface of the specularly reflective layer.
  • An adhesive layer 8 and a protective paper 9 are provided on the surface of the reflective sheet to facilitate the adhesion and protection of the reflective sheet.
  • the adhesive layer 8 It is a layer for attaching the retroreflective sheet to other objects, and may be composed of an alkaline binder; protective paper 9 It is a paper that protects the adhesive layer before attaching the retroreflective sheet to other objects.
  • the paper is made by laminating the paper with a polyethylene resin and then peeling one side with silicone or the like. .
  • the anti-counterfeiting color layer will change color with different viewing angles under different light sources and light. When the retroreflective light is observed or photographed, the color or pattern is difficult to see.
  • the principle is as follows:
  • the incident light L1 When incident from the side of the surface protective layer, the glass beads are refracted after reaching the glass beads, and then reflected by the specular reflection layer, and then refracted again on the glass beads, and emerge from the surface protective layer side, at which time the light will be directed Out of the same direction as the incident direction, light L1 Retroreflection is performed in this manner. Since the anti-counterfeit colored layer is uneven in thickness due to the structure of the previous layer during the coloring, the glass beads are different in the center point of the focus forming layer, and the anti-counterfeiting colored layer is relatively thin, and the glass microbeads are surrounded.
  • the retroreflected light enters the anti-counterfeiting layer and is thin.
  • the light of L3 is diffuse, so the color vision is weak.
  • the light that is retroreflected in this way enters the security coloring layer thicker than the front 90 °, so the color ratio seen is L1 Be deep.
  • the anti-counterfeit reflection sheet irradiates the light of the colorless light at night, most of the reflected light returning to the light is retroreflected light, and the light that returns to the light after being reflected by the anti-counterfeiting colored layer is only a small number.
  • the reflected light returning to the light is hardly affected by the anti-counterfeit colored layer, and as long as any of the surface protective layer, the sandwich layer, and the focus forming layer is not colored or slightly colored, it is almost colorless light.
  • the anti-counterfeit reflector will have light incident from a variety of different directions. Therefore, when the anti-counterfeit reflection sheet is observed during the day, the observer receives more light reflected from the security-colored layer.
  • the light reflected by the specular reflection layer is the light within the reflection wavelength band of the anti-counterfeit colored layer. Therefore, the color of the anti-counterfeiting color layer is deeper, and the angle is not the same.
  • the thickness is also different, and the effect of returning to the naked eye will be different. Therefore, the anti-counterfeiting color layer is changed under different light sources and light colors with different angles, and the color or pattern is difficult to see when the retroreflective light is observed or photographed on the front side.
  • the anti-counterfeit reflection sheet may further be provided with a printing layer 2 between the surface protective layer and the clamping layer, the printing layer 2
  • the layer of the ink to be colored is sometimes a light-transmitting property, and sometimes it is an opaque property. If it is opaque, the printing is partial, and the surface of the product is not all.
  • Printed layer 2 In the case of light-transmissive properties, the pattern of the printed layer appears in the color of the printed layer during the nighttime retroreflective light, and when the printed layer is opaque, the retroreflective light at night is blocked by the printed layer, so the printed layer The pattern emerges as a shadow.
  • the technical scheme of the present invention will be further described below by way of specific embodiments, wherein the glass microbeads are described by tiny glass spheres, and other shapes of the glass microbeads having a transmissive function are not described herein, and
  • the raw materials of the surface protective layer, the clamping layer, the anti-counterfeiting colored layer, the focus forming layer, the specular reflective layer and the adhesive layer can satisfy the requirements within the scope of the present invention, and the advantages and disadvantages of the different raw materials are compared. However, even if the effect is the worst, the anti-counterfeiting requirement can be achieved. Therefore, in the different embodiments described below, only the same raw materials are used as the test, and the raw materials of other compositions are not described herein.
  • the printed layer is used only for decorative purposes.
  • the product can be provided with a variety of patterns and colors to form different types, and there is no significant substantial effect in this embodiment, and will not be described in the following embodiments.
  • UV absorber trade name : Seesorb 103 , SHIPRO KASEIKAISHA CO., LTD.
  • leveling agent trade name: BYK-300, BYK-Chemie Japan KK
  • catalyst trade name: BECKAMINE P-198, DIC Co., Ltd.
  • Clamping layer 100 parts by weight of acrylic resin (trade name: RS-3000, Enxiai Chemical Co., Ltd.), 18 parts by weight of the color developing body (trade name: AR-6300, TOKUSHIKI Co., Ltd.), 13 parts by weight of isocyanate crosslinking agent (trade name: Sumijoule N-75, Sumika Bayer Urethane Co., Ltd.) and 21 parts by weight of toluene and 14 parts by weight as a solvent MIBK is mixed and stirred to prepare a resin compounding liquid for forming a layer, and then the resin compounding liquid is applied onto the surface protective layer, followed by drying at 70 ° C for 5 minutes to form a thickness of about 30 ⁇ m.
  • Clamping layer 100 parts by weight of acrylic resin (trade name: RS-3000, Enxiai Chemical Co., Ltd.), 18 parts by weight of the color developing body (trade name: AR-6300, TOKUSHIKI Co., Ltd.), 13 parts by weight of isocyanate crosslinking agent (trade name
  • Transmission layer Will be a tiny glass ball (trade name: NB-23S, Enxi Love Chemical Co., Ltd.) It adheres to the above-mentioned pinching layer and heat-treates, so that the micro glass ball is immersed in the pinching layer in such a manner that the micro glass ball is exposed from the pinching layer, and approximately 75 % of the diameter of the micro glass ball is held in the pinching layer.
  • Anti-counterfeiting coloring layer inkjet printer using solvent ink (trade name: JV33-130, MIMAKI Co., Ltd. is colored on the sandwich layer and the tiny glass ball, and sprayed with NCI black text and Blue Enchi Chemical Co., Ltd. LOGO to form a security coloring layer.
  • the focus forms a layer.
  • Specular reflection layer Aluminum is vacuum-deposited on the focus formation layer to obtain a specular reflection layer.
  • the engineering substrate is peeled off, thereby obtaining an anti-counterfeit reflection sheet having an adhesive layer.
  • the trade name and the manufacturer are given for the raw materials used for the anti-counterfeit reflector, but the trade name is not limited to the manufacturer, and it does not mean that only the raw materials of the model produced by the manufacturer can meet the requirements. Rather, it serves as a general mark. Any resin or additive of the same type that satisfies the basic performance requirements of the anti-counterfeit sheet can be used as a raw material.
  • the coloring method of the anti-counterfeiting coloring layer is changed to the gravure printing coating method, and NCI black text and blue Enxi Love Chemical Co., Ltd. are printed. Except for LOGO, the rest are the same as in Embodiment 1.
  • the coloring method of the anti-counterfeiting coloring layer is changed to a gravure printing coating method, NCI black text and blue Enxi Chemical Co., Ltd. LOGO are printed, and a silicone resin is added to the ink of the anti-counterfeiting color layer (density is 0.99g/cm 3 , viscosity: 128mm 2 /s), the addition ratio is 10% of the weight of the anti-counterfeit color layer ink (addition ratio 0.1 ⁇ 90% can be added, and the density can be added to the density of 1 ⁇ 1.1g/cm 3
  • the borneol resin achieved the same effect, and the rest were the same as in Example 1.
  • the coloring method of the anti-counterfeiting coloring layer is changed to a screen printing coating method, and NCI black text and blue Enxi Love Chemical Co., Ltd. are printed. Except for LOGO, the rest are the same as in Embodiment 1.
  • Example 1 the anti-counterfeit colored layer in Example 1 was removed, and MIMAKI was used between the surface protective layer and the sandwich layer instead.
  • the JV33-130 solvent ink inkjet printer manufactured by the company is colored on the sandwich layer, sprayed with NCI black text and blue Enxi Chemical Co., Ltd. LOGO, and the rest are the same as in the first embodiment. the same.
  • Example 1 the anti-counterfeit colored layer in Example 1 was removed, and the surface of the sandwich layer which was not in contact with the surface protective layer and the micro glass ball were used instead.
  • JV33-130 Solvent Inkjet Printer from MIMAKI Co., Ltd. is colored, sprayed with NCI Black Text and Blue Enxi Chemical Co., Ltd. LOGO, and the rest are the same as Example 1 the same.
  • Example 1 the anti-counterfeit colored layer in Example 1 was removed, and the surface of the sandwich layer which was not in contact with the surface protective layer and the micro glass ball were used instead.
  • JV33-130 Solvent Inkjet Printer from MIMAKI Co., Ltd. is colored, sprayed with NCI Black Text and Blue Enxi Chemical Co., Ltd. LOGO, and the rest are the same as Example 1 the same.
  • the use between the focus forming layer 60 and the specular reflection layer 70 is used.
  • MIMAKI Co., Ltd. JV33-130 Solvent ink inkjet printer is colored on the focus layer, sprayed with NCI black text and blue Enxi Chemical Co., Ltd. LOGO .
  • the reflective sheet was obtained in the same manner as in Example 2 except for the rest.
  • Example 1 The anti-counterfeiting performance of the above-described Example 1 and Comparative Examples 1 to 3 was compared.
  • Test Method 1 Under normal light, front view and side view black NCI text and blue Enxi Chemical Co., Ltd. LOGO See if the color has obvious depth changes, referred to as method one.
  • Test Method 2 Turn on the flash function camera, use the flash photo to black NCI text and Blue Enxi Chemical Co., Ltd. LOGO See if the pattern is clearly visible, referred to as method two.
  • Test Method 3 Tools with light source, turn on the light source, observe the black on the front NCI text and Blue Enxi Chemical Co., Ltd. LOGO Whether it is clearly visible, referred to as method three.
  • Test Method 4 Ordinary flashlight front and side illumination, naked eye and flashlight light in the same position to observe black NCI Text and Blue Enxi Love Chemical Co., Ltd. LOGO, see if the color has obvious depth changes, referred to as Method Four.
  • Example 1 The anti-counterfeiting properties of Example 1 and Comparative Examples 1 to 3 were compared by the above test methods, and the results are shown in the following table.
  • Example 3 is attached to the aluminum plate. After an hour, uncover the attached product, then you will find that the anti-counterfeiting layer will be separated, the color will produce color difference, the pattern will be destroyed, and can no longer be used. This will prevent the product from being completely uncovered and attached to other products. Go where.
  • a printing layer may be disposed between the surface protective layer and the clamping layer as needed, and the printing layer may have various patterns and colors of the product to form different kinds, since it is not obvious in the embodiment. Substantial role will not be repeated here.
  • the present invention can provide an excellent anti-counterfeit retroreflective sheeting which can not be copied, and can be applied to traffic signs, engineering signs, commercial signs, automobile license plates, retro-reflective labels, retroreflective RFID. (Radio identification) label.

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Abstract

一种防伪反射片，包括由上至下设置的表面保护层(1)、夹持层(3)、防伪着色层(5)、焦点形成层(6)以及镜面反射层(7)，所述的夹持层(3)与焦点形成层(6)之间设置有透射层(4)和防伪着色层(5)，并公开了防伪反射片的制备方法。通过设置防伪着色层(5)从而使防伪反射片具有防伪、防篡改以及防再次使用防伪效果。

Description

一种防伪反射片及其制备方法 一种防伪反射片及其制备方法
技术领域
本发明涉及一种反光材料，更为具体的是涉及一种防伪反射片及其制备方法。
背景技术
反射片因具有优异的夜间能见度，被广泛运用于汽车牌照、道路标识和认证标签。然而，目前市场上假冒的制品很多，同时也缺乏必要的防假冒手段，虽然很多研究人员都在研究带有各种防伪技术或已经运用了一些防伪技术来防止假冒制品出现的反射片，但由于防伪制品技术手段比较简单，如激光水印，往往导致产品依然容易被仿制，而目前虽然也出现了一些比较高级的防伪技术，但往往需要专门的设备和专业技能才能进行识别，这无形中给消费者的识别设置了门槛，不利于推广。而公开号为 CN10119418A 的专利申请公开了'设置有印刷图像的反向反射片'，该反向反射片通过在一定的位置上规则地配置具有光透射性的多个光学元件的光学元件阵列片，即经由双凸透镜片或凸透镜片阵列片观察印刷图像时可以表现立体视觉图像，从而达到防伪的目的，虽然该发明申请的防伪技术比较复杂，并且并不需要借助专业的设备，也无需专业的技能即可进行识别，但由于其潜像设置于表层与下一层次之间，即相当于设置在印刷层上，一方面无法达到通过改变观察角度，使防伪标识发生变化，另一方面也容易遭到篡改，并且当反射片揭开后也可以继续使用，无法达到防伪、防篡改以及防再次使用的目的。
因此，亟需一种容易识别又不易仿制的防伪反射片。
发明内容
本发明的目的在于克服现有技术之缺陷，提供了一种 防伪、防篡改以及防再次使用的防伪反射片，同时还提供了该防伪反射片的制备方法 。
本发明的技术方案为：
一种防伪反射片，包括由上至下依次连接表面保护层、夹持层、防伪着色层、焦点形成层、镜面反射层、粘合剂层以及保护纸，防伪着色层与夹持层之间设置有透射层，透射层为玻璃微珠组成的透镜列阵组合结构，玻璃微珠上部进入夹持层内，而下部穿过防伪着色层并与焦点形成层相接，防伪着色层与夹持层部分相接，表面保护层、夹持层以及焦点形成层均由具有透光性质的薄膜状树脂构成，防伪着色层由颜料或树脂构成，而镜面反射层为金属反射膜，粘合剂层与镜面反射层相接，而保护纸与粘合剂层相接。
进一步优选，防伪着色层由透光性质的颜料或树脂构成，防伪着色层的厚度为透射层厚度的 0.1%~10% ，而玻璃微珠超过一半厚度进入夹持层内，玻璃微珠在夹持层中的填充率为 60%~90% 。
防伪着色层通过涂布方式形成，涂布方式包括凹版印刷涂布、写真喷绘涂布、丝网印刷涂布，涂布厚度小于 1 μm 。
表面保护层、夹持层以及焦点形成层的薄膜状树脂均选自丙烯酸树脂，醇酸树脂，氟树脂，氯乙烯树脂，聚酯，聚氨酯树脂，聚碳酸酯中至少一种，考虑耐候性和加工性，优选丙烯酸树脂，聚酯，氯乙烯树脂中至少一种，而考虑涂色时的适合度或着色时着色剂的分散性，则优选丙烯酸树脂。防伪着色层由粉状体颜料构成，表面保护层、夹持层与焦点形成层中至少一层均通过着色剂着色，并且表面保护层、夹持层与焦点形成层中至少一层的颜色与防伪着色层相同，进一步考虑显像效果，表面保护层优选为无色透明状。
防伪着色层由有机颜料或无机颜料组成，其中，有机颜料选自偶氮颜料、酞菁颜料中的一种，无机颜料选自金属氧化物颜料、亚铁氰化铁颜料、紫外发光着色剂、蓄光发光着色剂中的一种。
防伪着色层由薄膜状树脂构成，薄膜状树脂选自丙烯酸树脂，醇酸树脂，氟树脂，氯乙烯树脂，聚酯，聚氨酯树脂，聚碳酸酯中至少一种。
进一步改进，构成防伪着色层的颜料或树脂中可添加有硅酮树脂或降冰片烯树脂中至少一种，添加比例为原防伪着色层颜料或树脂重量的0.1-90%，其中，硅酮树脂的密度为0.99g/cm3 ，粘度为128mm2/s，而降冰片稀树脂的密度为1~1.1g/cm3。
透射层由玻璃微珠排列组成，其中玻璃微珠由玻璃、陶瓷、聚合物、矿石中至少一种构成，玻璃微珠为具有折射功能的任意形状，优选球状体。
一种防伪反射片，其制备方法包括如下步骤：
在表面保护层的一个面上涂抹夹持层，并在夹持层上摆放玻璃微珠，玻璃微珠的一部分将通过表面张力进入到夹持层内，玻璃微珠进入夹持层的深度通过调节夹持层的硬化状态来调整；夹持层完全硬化并把玻璃微珠固定好后，再在安装有玻璃微珠的夹持层上设置防伪着色层；依次放上焦点形成层和镜面反射层，从而形成防伪反射片。
本发明的有益效果：
1 、本发明的反射片通过设置防伪着色层，并在防伪着色层上设置有图案、文字、水印，或者单独的颜色等防伪标识，该防伪标识能随着观察角度改变而发生变化，而在逆反射或使用闪光灯照射时防伪着色层上设置的图案、文字、水印，或者单独的颜色等防伪标识均不可见，从而具有防伪效果。
2 、本发明通过在防伪着色层树脂里或油墨里添加特殊树脂，已经贴着的反射片被揭开时，防伪着色层会被破坏、层间分离，使破坏部分和没有破坏部分色相不一样，或防伪着色层结构被破坏，使图案无法恢复也无法有效使用。
附图说明
图 1 为本发明实施例提供的层状结构图。
图中， 1- 表面保护层、 2- 印刷层、 3- 夹持层、 4- 透射层、 5- 防伪着色层、 6- 焦点形成层、 7- 镜面反射层、 8- 粘合剂层、 9- 保护纸。
具体实施方式
下面将结合实施例对本申请的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
如图 1 所示 ，一种防伪反射片， 包括由下至下依次连接表面保护层 1 、夹持层 3 、防伪着色层 5 、焦点形成层 6 以及镜面反射层 7 ，防伪着色层与夹持层之间设置有透射层 4 ，透射层为玻璃微珠组成的透镜列阵组合结构，玻璃微珠上部进入夹持层内，而下部穿过防伪着色层并与焦点形成层相接，防伪着色层与夹持层部分相接，表面保护层、夹持层以及焦点形成层均由具有透光性质的平坦的薄膜状树脂构成，防伪着色层由颜料或树脂构成，而镜面反射层为金属反射膜。反射片由表面保护层 1 、夹持层 3 、透射层 4 、防伪着色层 5 、焦点形成层 6 以及镜面反射层 7 的结合即可完成反射和防伪的功能，而为了便于粘贴和保护，可以在镜面反射层 7 的表面设置粘合剂层 8 ，同时在粘合剂层 8 的表面设置保护。
表面保护层 1 的薄膜状树脂包括丙烯酸树脂，醇酸树脂，氟树脂，氯乙烯树脂，聚酯，聚氨酯树脂，聚碳酸酯中至少一种，而从耐候性、加工性来看，丙烯酸树脂，聚酯，氯乙烯树脂更为适合；如果考虑涂色时的适合度或着色时着色剂的分散性等，则丙烯酸树脂更为合适。另外，为了改善表面保护层的其他性能，也可以根据需要在树脂中添加紫外线吸收剂、安定剂、可塑剂、架桥剂等添加剂。表面保护层可进行着色，也可为无色透明，其中以无色透明为最佳，而染色时也能满足要求。
适用于表面保护层 1 着色的颜料类或者染料类着色剂如下所示：
黄色：异吲哚酮系，异吲哚啉系，喹酞酮系，蒽醌系，吡唑啉酮系，黄烷士酮系，苯并咪唑酮系，偶氮镍系等的着色剂；红色：蒽醌系，二萘嵌苯系，喹吖酮系，靛类系等；蓝色：酞花青系，翁还原染色系，蒽醌系，钴系等；绿色着色剂有酞花青系，翠绿系，氧化铬系，镉系等；茶色：铁丹系着色剂，或并用异吲哚酮系黄色着色剂，二萘嵌苯系红色着色剂和酞花青系蓝色着色剂。橙色：单色有蒽醌系，吡唑啉酮系，紫环酮系，二萘嵌苯系，喹吖酮系，也可以并用异吲哚酮系黄色着色剂和二萘嵌苯系红色着色剂；白色：酞系，锌系，铅系着色剂；黑色：炭黑系，苯胺黑系，二萘嵌苯黑系，钛黑系。
构成表面保护层所采用的树脂均可应用于夹持层 3 和防伪着色层 5 ，另外防伪着色层还可以由粉状颜料构成， 防伪着色层由有机颜料或无机颜料组成，其中，有机颜料选自偶氮颜料、酞菁颜料中的一种，无机颜料选自金属氧化物颜料、亚铁氰化铁颜料、紫外发光着色剂、蓄光发光着色剂中的一种。紫外线发光着色剂包括碱性土铝酸类，硫化金属类，硅类等紫外线发光着色剂。蓄光发光着色剂包括碱性土铝酸类，硫化金属类等蓄光发光着色剂。另外，表面保护层的着色剂也可以作为粉状颜料来使用。另外，为了使防伪反射片在使用后无法进行篡改，可在防伪着色层的原料中添加 硅酮树脂或降冰片烯树脂 ，当贴着的防伪反射片被揭开时，防伪着色层与夹持层、剥离微珠层间分离，达到防伪反射片的防改篡目的。
夹持层 3 与防伪着色层 5 之间设置有透射层 4 ，该透射层由玻璃微珠排列组成，其中玻璃微珠由玻璃、陶瓷、聚合物、矿石中至少一种构成，玻璃微珠为具有折射功能的任意形状，如球状体、半球状体。玻璃微珠超过一半厚度进入夹持层内，以玻璃微珠的上下高度为厚度，玻璃微珠有超过一半高度插入夹持层内。另外，玻璃微珠在夹持层内的填充率为 60~90% ，防伪着色层的厚度为透射层厚度的 0.1~10% ，把防伪着色层的厚度控制在透射层 4 厚度的 0.1 ％及以上可以得到更加充分的显色，而控制在 10 ％及以下可以得到更加充分的色变效果，从而可以很好的发挥防伪作用。防伪着色层通过涂布方式形成，涂布厚度小于 1 μm ，只要涂布厚度能控制在 1 μm 以内的涂布方式均适用，如 凹版印刷涂布、写真喷绘涂布、丝网印刷涂布等 。而由于着色层在制品内，因此在防伪着色层上涂布的图案或水印具有不可逆性，也无法通过溶剂擦拭去除。
焦点形成层 6 与玻璃微珠相接，玻璃微珠也对焦点形成层起固定作用，焦点形成层用于调节微小玻璃球的表面到镜面反射的距离，构成保护表面层的树脂均可用于焦点形成层，另外焦点形成成也可以用与表面保护层相同的方法着色。
镜面反射层 7 是由铝、铜、银等金属构成的层状结构，比如用真空蒸镀的方式形成。镜面反射层通过焦点形成层隔开一定的距离并相对，并在镜面反射层的表面上形成反射区域。 在反射片的表面设置粘合剂层 8 和保护纸 9 ，可便于反射片的粘贴和保护。其中， 粘合剂层 8 是为了将逆反射片贴在其他物体而设的一个层，可由碱性粘合剂构成；保护纸 9 是在把逆反射片贴到其他物体之前起保护粘合剂层作用的纸，该纸是把纸用聚乙烯树脂做层压处理，再将其中一面用硅酮等经过剥离处理而制成的。而防伪着色层在不同的光源、光线下，会随着观察角度的不同而发生颜色的变化，在逆反射光线正面观察或拍照时，颜色或图案是很难看到的，其原理如下：
如图 1 当中用虚线所示，入射光线 L1 从表面保护层侧入射时，到达玻璃微珠后在玻璃微珠发生折射，再经镜面反射层反射，然后再一次在玻璃微珠上折射，并从表面保护层侧出射，这时光线将向与入射方向近乎相同的方向出射，光线 L1 以这样的方式进行逆反射。由于防伪着色层在上色时因为前一层结构的原因导致了防伪着色层的厚度不均匀，玻璃微珠在焦点形成层的中心点位置不相同，防伪着色层比较薄，而玻璃微珠四周及夹持层上没有填充玻璃微珠的地方比较厚，当肉眼在正面 90 °（ L1 光线）观察时逆反射的光线进入防伪着色层是薄的， L3 的光线又是漫反射，所以颜色视觉是弱的，当斜面看时（光线 L2 ）以这样方式逆反射的光线进入防伪着色层比正面 90 °看时要厚，所以看到的颜色比 L1 要深。另外，在夜间防伪反射片照射无色灯光的光线时，回到灯光的反射光线中大部分是逆反射光线，经过防伪着色层反射后回到灯光的光线只是极少数。所以，回到灯光的反射光线几乎不受防伪着色层的影响，只要表面保护层，夹持层，焦点形成层当中的任何一个没有着色或稍微有点着色，则几乎为无色的光线。而在白天防伪反射片将有从各种不同方向入射的光线。因此，白天观察防伪反射片时，观察者会受到较多从防伪着色层反射的光线。镜面反射层反射的光线是防伪着色层的反射波长带域内的光线。所以，看到防伪着色层的颜色较深，而角度不一样防伪着色层 50 厚度也不一样，返回肉眼的效果也会不一样。从而实现了防伪着色层在不同的光源、光线下，随着角度不同颜色发生变化，在逆反射光线正面观察或拍照时，颜色或图案是很难看到的效果。
防伪反射片除了上述层次结构外，还可以在在表面保护层与夹持层之间设置印刷层 2 ，该印刷层 2 为被着色的墨水层，有时为透光性质，有时为不透光性质，如果是不透光时，印刷是部分的，而不能制品面全部都是。印刷层 2 为透光性质时，夜间逆反射的光线中，印刷层的图案以印刷层的颜色浮现，而印刷层为不透光性质时，夜间逆反射的光线会被印刷层所遮挡，所以印刷层的图案以影子浮现。
下面将通过具体的实施例对本发明的技术方案作进一步说明，其中，玻璃微珠以微小玻璃球进行说明，其他形状的具有透射功能的玻璃微珠在此不作赘述，另外，由于构成 表面保护层、夹持层、防伪着色层、焦点形成层、镜面反射层、粘合剂层的原料在本发明限定的范围内均能满足要求，不同原料之间相比均存在效果的优劣，但即使效果最差的也能达到防伪的要求，因此，在下述不同实施例中仅以相同的原料作为试验，其他组成的原料在此也不作赘述，另外，印刷层由于只是作为装饰用途， 可以使产品具有多种图案和颜色，从而形成不同的种类，在本实施例中没有明显的实质性作用， 在下述实施例中也不作赘述。
实施例 1
工程基材：使用帝人株式会社的厚度为 75 μ的透明聚对苯二甲酸乙二醇酯薄膜（商品名： Tetoron Film S-75 ，帝人株式会社）；
表面保护层：将 100 重量份的丙烯酸树脂溶液（商品名： RS-1200 ，恩希爱化工有限公司）、 16 重量份甲基化三聚氰胺树脂溶液（商品名 ： NIKALAC MS-11 ， SANWA CHEMICAL CO. ， LTD. ）、 6 重量份的纤维素衍生物 ( 商品名 ： CAB ， TOKUSHIKICo. ， Ltd.) 、 1.5 重量份的紫外线吸收剂 ( 商品名 ： Seesorb 103 ， SHIPRO KASEIKAISHA CO. ， LTD.) 、 0.05 重量份的均化剂 ( 商品名 ： BYK-300 ， BYK-Chemie Japan KK) 、 0.12 重量份的催化剂 ( 商品名： BECKAMINE P-198 ， DIC 株式会社 ) 以及 16.7 重量份的溶剂（ MIBK/ 甲苯＝ 8/2 ）搅拌混合，从而制成表面保护层形成用的树脂配合液，将该树脂配合液涂布在工程基材膜上加以干燥，形成厚度大约 40 μ的表面保护表面保护层；
夹持层：将 100 重量份的丙烯酸树脂 ( 商品名 ： RS-3000 ，恩希爱化工有限公司 ) 、 18 重量份的发色母体 ( 商品名 ： AR-6300 ， TOKUSHIKI Co. ， Ltd.) 、 13 重量份的异氰酸酯系交联剂 ( 商品名 ： Sumijoule N-75 ， Sumika Bayer Urethane Co. ， Ltd.) 以及作为溶剂的 21 重量份的甲苯和 14 重量份的 MIBK 混合搅拌，从而制成保持层形成用的树脂配合液，然后将该树脂配合液涂布于表面保护层上，之后在 70 ℃下干燥 5 分钟，从而形成厚度大约为 30 μ m 的夹持层；
透射层： 将微小玻璃球 ( 商品名： NB-23S ，恩希爱化工有限公司 ) 附着于上述夹持层，并加以热处理，以微小玻璃球从夹持层露出的形式使微小玻璃球沉浸于夹持层中，在夹持层中保持着微小玻璃球直径的大致 75 ％。
防伪着色层：使用溶剂性墨水喷墨打印机（商品名： JV33-130 ， MIMAKI 株式会社）在夹持层以及微小玻璃球上着色，喷上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO ，从而形成防伪着色层。
焦点形成层：将 100 重量份的丙烯酸树脂溶液 ( 商品名： RS-5000 ，恩希爱化工有限公司 ) 、 5.5 重量份的甲基化三聚氰胺树脂溶液 ( 商品名： NIKALAC MS-11 ， SANWA CHEMICAL CO. ， LTD.) 以及 39.3 重量份的溶剂（ MIBK/ 甲苯＝ 4/6 ）混合搅拌，从而制成焦点形成层用的树脂配合液，将该树脂配合液涂布于保持层以及微小玻璃球之上并加以干燥，从而形成平均厚度大约为 20 μ m 的焦点形成层。
镜面反射层：将铝真空蒸镀于焦点形成层之上，从而获得镜面反射层。
粘合剂层：将 100 重量份的丙烯酸丁酯 BA/ 丙烯酸 AA 的乙酸乙酯共聚物溶液（乙酸乙酯 / 甲苯 =1/1 ）、 9 重量份的白色着色剂 ( 商品名： AR-9127W ， TOKUSHIKICo. ， Ltd.) 、 0.5 重量份的异氰酸酯系交联剂 ( 商品名 ： CoronateL ， NipponPolyurethane Industry Co. ， Ltd.) 以及作为溶剂的 16.1 重量份的乙酸乙酯搅拌混合，从而制成粘合剂层形成用的树脂配合液，将该树脂配合液涂布于剥离膜 ( 商品名： E2P-H(P) ， LINTEC Corporation) 上并加以干燥，从而形成厚度大约为 40 μ m 的粘合剂层。
接着，在贴合镜面反射层和粘合剂层之后，剥离工程基材，从而获得具有粘合剂层的防伪反射片。
本实施例中针对防伪反射片所采用的原料给出了商品名及生产厂家，但该商品名跟生产厂家并不是起限制作用，并不是指只有该厂家生产的该型号的原料才能满足要求，而是起一般的标示作用而已，任何能满足防伪反射片的基本性能要求的同类型的树脂或添加剂均可作为原料。
实施例 2
本实施例中，除防伪着色层的着色方法改为凹版印刷涂布方式，印上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 外，其余均与实施例 1 相同。
实施例 3
本实施例中，除防伪着色层的着色方法改为凹版印刷涂布方式，印上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO ，并且在防伪着色层的油墨里添加 硅酮树脂（密度为0.99g/cm3 ，粘度为128mm2/s） ，添加比例为防伪着色层油墨重量的 10% （添加比例 0.1~90% 皆可，另外也可以添加 密度为1~1.1g/cm3 的降冰片树脂，达到的效果一样），其余均与实施例 1 相同。
实施例 4
本实施例中，除防伪着色层的着色方法改为丝网印刷涂布方式，印上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 外，其余均与实施例 1 相同。
比较例 1
本比较例中，除将实施例 1 中的防伪着色层去除，并改为在表面保护层与夹持层之间使用 MIMAKI 株式会社产的 JV33-130 溶剂性墨水喷墨打印机在夹持层着色，喷上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 外，其余的均与实施例 1 相同。
比较例 2
本比较例中，除将实施例 1 中的防伪着色层去除，并改为与表面保护层不相接的夹持层表面及微小玻璃球上使用 MIMAKI 株式会社产的 JV33-130 溶剂性墨水喷墨打印机着色，喷上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 外，其余的均与实施例 1 相同。
比较例 3
本比较例中，除将实施例 1 中的防伪着色层去除，并改为与表面保护层不相接的夹持层表面及微小玻璃球上使用 MIMAKI 株式会社产的 JV33-130 溶剂性墨水喷墨打印机着色，喷上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 外，其余的均与实施例 1 相同。
除了将在实施例 2 中防伪着色层 50 去除之外，改在焦点形成层 60 与镜面反射层 70 之间使用 MIMAKI 株式会社产 JV33-130 溶剂性墨水喷墨打印机在焦点形成层上着色，喷上 NCI 黑色文字及蓝色恩希爱化工有限公司 LOGO 。其余均以与实施例 2 相同的方法制得反射片。
对上述的实施例 1 以及比较例 1 ～ 3 的防伪性能进行对比。
测试方法一：在普通光线下，正面观察和侧面观察黑色 NCI 文字和蓝色恩希爱化工有限公司 LOGO ，看颜色是否有明显的深浅变化，简称方法一。
测试方法二：打开闪光功能的相机，使用闪光拍照黑色 NCI 文字和蓝色恩希爱化工有限公司 LOGO ，看图案是否明显可见，简称方法二。
测试方法三：带有光源的工具，打开光源，正面观察黑色 NCI 文字和蓝色恩希爱化工有限公司 LOGO ，是否明显可见，简称方法三。
测试方法四：普通手电筒正面照射及侧面照射，肉眼和手电筒光线在同一位置观察黑色 NCI 文字和蓝色恩希爱化工有限公司 LOGO ，看颜色是否有明显的深浅变化，简称方法四。
由上述的测试方法对实施例 1 以及比较例 1 ～ 3 的防伪性能进行对比，其结果在下表中表示。
方法一 方法二 方法三 方法四
实施例1 明显变化 不可见 不可见 明显变化
实施例2 明显变化 不可见 不可见 明显变化
实施例3 明显变化 不可见 不可见 明显变化
实施例4 明显变化 不可见 不可见 明显变化
比较例1 无 可见 可见 无
比较列2 无 可见 可见 无
比较例3 无 可见 可见 无
还有把实例 3 的制品贴在铝板上，过 24 小时后，揭开贴合的制品，这时有会发现防伪层出会被分离开，颜色产生了色差，图案也被破坏，无法再被使用，这样可以防止产品被完整揭开后贴到其他地方去。
上述实施例中还可以根据需要在表面保护层与夹持层之间设置印刷层，该印刷层可以使产品具有多种图案和颜色，从而形成不同的种类，由于在本实施例中没有明显的实质性作用，在此不作赘述。
如上述说明，通过本发明可以提供具有无法仿制的优异防伪逆反射片，可以运用于交通标识、工程标识、商业标识、汽车牌照、逆反射式标贴，逆反射式 RFID （电波识别）标签。

Claims (10)

  1. 一种防伪反射片，包括由上至下设置的表面保护层、夹持层、焦点形成层以及镜面反射层，所述的夹持层与焦点形成层之间设置有透射层，所述的透射层为玻璃微珠组成的透镜列阵组合结构，所述的表面保护层、夹持层以及焦点形成层均由具有透光性质的薄膜状树脂构成，所述的镜面反射层为金属反射膜，其特征在于：所述的夹持层与焦点形成层之间设置有防伪着色层，所述的玻璃微珠一端进入夹持层内部，另一端穿过防伪着色层与焦点形成层相接，所述的防伪着色层与夹持层、焦点形成层均不完全相接。
  2. 根据权利要求1所述的防伪反射片，其特征在于：所述的防伪着色层由透光性质的颜料或薄膜状树脂构成，防伪着色层的厚度为透射层厚度的0.1%~10%。
  3. 根据权利要求2所述的防伪反射片，其特征在于：所述的防伪着色层中添加有硅酮树脂或降冰片烯树脂中至少一种，添加比例为防伪着色层重量比的0.1%~90%。
  4. 根据权利要求1~3中任一项所述的防伪反射片，其特征在于：所述的玻璃微珠超过一半厚度进入夹持层内，玻璃微珠在夹持层中的填充率为60%~90%。
  5. 根据权利要求1~3中任一项所述的防伪反射片，其特征在于：所述的防伪着色层通过涂布或印刷方式形成，涂布或印刷的厚度小于1μm。
  6. 根据权利要求4所述的防伪反射片，其特征在于：所述的防伪着色层通过涂布或印刷方式形成，涂布或印刷的厚度小于1μm。
  7. 根据权利要求6所述的防伪反射片，其特征在于：所述的玻璃微珠由玻璃、陶瓷、聚合物、矿石中至少一种构成，玻璃微珠为具有折射功能的任意形状。
  8. 根据权利要求7所述的防伪反射片，其特征在于：所述的表面保护层、夹持层与焦点形成层中至少一层通过着色剂着色，表面保护层、夹持层与焦点形成层中至少一层的颜色与与防伪着色层相同。
  9. 根据权利要求8所述的防伪反射片，其特征在于：所述的表面保护层为无色透明状。
  10. 一种权利要求1所述的防伪反射片，其制备方法包括如下步骤：
    在表面保护层的一个面上涂抹夹持层，并在夹持层上摆放玻璃微珠，玻璃微珠的一部分将通过表面张力进入到夹持层内，玻璃微珠进入夹持层的深度通过调节夹持层的硬化状态来调整；夹持层完全硬化并把玻璃微珠固定好后，再在安装有玻璃微珠的夹持层上设置防伪着色层；依次放上焦点形成层和镜面反射层，从而形成防伪反射片。
PCT/CN2016/083103 2016-05-24 2016-05-24 一种防伪反射片及其制备方法 WO2017201665A1 (zh)

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