CN109313293B - Anti-counterfeiting reflector plate and preparation method thereof - Google Patents
Anti-counterfeiting reflector plate and preparation method thereof Download PDFInfo
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- CN109313293B CN109313293B CN201680085458.9A CN201680085458A CN109313293B CN 109313293 B CN109313293 B CN 109313293B CN 201680085458 A CN201680085458 A CN 201680085458A CN 109313293 B CN109313293 B CN 109313293B
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- 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
Abstract
The invention relates to a reflective material, in particular to an anti-counterfeiting reflective sheet and a preparation method thereof, wherein the azimuth reflective sheet comprises a surface protective layer, a clamping layer, an anti-counterfeiting colored layer, a focus forming layer and a mirror surface reflective layer which are arranged from top to bottom, and a transmission layer and the anti-counterfeiting colored layer are arranged between the clamping layer and the focus forming layer; coating a clamping layer on one surface of the surface protection layer, placing glass beads on the clamping layer, enabling part of the glass beads to enter the clamping layer through surface tension, and adjusting the depth of the glass beads entering the clamping layer through adjusting the hardening state of the clamping layer; after the clamping layer is completely hardened and the glass beads are fixed, arranging an anti-counterfeiting coloring layer on the clamping layer provided with the glass beads; sequentially placing a focus forming layer and a mirror reflection layer to form the anti-counterfeiting reflection sheet; thereby make anti-fake reflector plate have anti-fake, tamper-proofing and prevent reuse anti-fake effect through setting up anti-fake dyed layer.
Description
Technical Field
The invention relates to a reflective material, in particular to an anti-counterfeiting reflective sheet and a preparation method thereof.
Background
The reflective sheet has excellent night visibility, and is widely used for license plates, road signs and authentication labels of automobiles. However, many counterfeit products are available on the market at present, and meanwhile, there is no necessary anti-counterfeit means, and although many researchers are researching reflectors with various anti-counterfeit technologies or have applied some anti-counterfeit technologies to prevent counterfeit products, the products are still easy to be copied because the anti-counterfeit products are simple in technical means, such as laser watermarking, and at present, some higher anti-counterfeit technologies are also available, but special equipment and professional skills are often needed to identify the products, so that a threshold is invisibly set for the identification of consumers, and the popularization is not facilitated. And patent application publication No. CN10119418A discloses "a retroreflective sheet provided with a printed image", the retroreflective sheet is formed by regularly arranging an optical element array sheet having a plurality of optical elements having light transmissivity at a predetermined position, namely, the printed image can be expressed by observing the lenticular lens sheet or the lenticular lens sheet array sheet, thereby achieving the anti-counterfeiting purpose, although the anti-counterfeiting technology of the invention is complex, and can be identified without the help of professional equipment and professional skill, because the latent image is arranged between the surface layer and the next layer, namely, the anti-counterfeiting label is arranged on the printing layer, on one hand, the anti-counterfeiting label cannot be changed by changing the observation angle, on the other hand, the anti-counterfeiting label is easy to be tampered, and when the reflector plate is uncovered, the reflector plate can be continuously used, and the aims of anti-counterfeiting, anti-tampering and anti-reuse cannot be fulfilled.
Therefore, an anti-counterfeit reflective sheet which is easy to identify and is not easy to copy is needed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an anti-counterfeiting reflector plate which is anti-counterfeiting, anti-tampering and anti-reuse, and also provides a preparation method of the anti-counterfeiting reflector plate.
The technical scheme of the invention is as follows:
the utility model provides an anti-fake reflector plate, from top to bottom connects gradually surface protection layer, clamping layer, anti-fake dyed layer, focus cambium, mirror reflection layer, adhesive layer and protection paper, be provided with the transmission layer between anti-fake dyed layer and the clamping layer, the transmission layer is the lens array integrated configuration that glass bead constitutes, glass bead upper portion gets into in the clamping layer, and the lower part passes anti-fake dyed layer and meets with the focus cambium, anti-fake dyed layer meets with clamping layer part, surface protection layer, clamping layer and focus cambium constitute by the film form resin that has the light transmission property, anti-fake dyed layer comprises pigment or resin, and mirror reflection layer is the metal reflectance coating, adhesive layer and mirror reflection layer meet, and protection paper meets with adhesive layer.
Preferably, the anti-counterfeiting coloring layer is made of transparent pigment or resin, the thickness of the anti-counterfeiting coloring layer is 0.1% -10% of the thickness of the transmission layer, more than half of the thickness of the glass beads enters the clamping layer, and the filling rate of the glass beads in the clamping layer is 60% -90%.
The anti-counterfeiting coloring layer is formed by a coating mode, wherein the coating mode comprises gravure coating, portrait spray coating and screen printing coating, and the coating thickness is less than 1 mu m.
The film-like resin of the surface protective layer, the holding layer and the focus forming layer is at least one resin selected from the group consisting of acrylic resins, alkyd resins, fluorine resins, vinyl chloride resins, polyesters, polyurethane resins and polycarbonates, and at least one resin selected from the group consisting of acrylic resins, polyesters and vinyl chloride resins is preferred in view of weather resistance and processability, and acrylic resins are preferred in view of suitability for painting or dispersibility of a colorant for coloring. The anti-forgery colored layer is formed of a powdery pigment, at least one of the surface protection layer, the sandwiching layer, and the focus forming layer is colored with a colorant, and the color of at least one of the surface protection layer, the sandwiching layer, and the focus forming layer is the same as that of the anti-forgery colored layer.
The anti-counterfeiting coloring layer consists of organic pigment or inorganic pigment, wherein the organic pigment is selected from one of azo pigment and phthalocyanine pigment, and the inorganic pigment is selected from one of metal oxide pigment, ferric ferrocyanide pigment, ultraviolet luminescent colorant and light storage luminescent colorant.
The anti-counterfeiting coloring layer is composed of film resin, and the film resin is at least one selected from acrylic resin, alkyd resin, fluororesin, vinyl chloride resin, polyester, polyurethane resin and polycarbonate.
The anti-counterfeiting coloring layer is further improved, at least one of silicone resin or norbornene resin can be added into the pigment or resin forming the anti-counterfeiting coloring layer, the adding proportion is 0.1% -90% of the weight of the pigment or resin of the original anti-counterfeiting coloring layer, wherein the density of the silicone resin is 0.99g/cm3, the viscosity is 128mm2/s, and the density of the norborneol resin is 1g/cm 3-1.1 g/cm 3.
The transmission layer is composed of an arrangement of glass beads, wherein the glass beads are composed of at least one of glass, ceramics, polymers and ores, and the glass beads are in any shape with a refraction function, preferably spheroids.
An anti-counterfeiting reflector plate comprises the following steps:
coating a clamping layer on one surface of the surface protection layer, placing glass beads on the clamping layer, enabling part of the glass beads to enter the clamping layer through surface tension, and adjusting the depth of the glass beads entering the clamping layer through adjusting the hardening state of the clamping layer; after the clamping layer is completely hardened and the glass beads are fixed, arranging an anti-counterfeiting coloring layer on the clamping layer provided with the glass beads; and sequentially placing the focus forming layer and the mirror surface reflecting layer to form the anti-counterfeiting reflecting sheet.
The invention has the beneficial effects that:
1. the reflector plate is provided with the anti-counterfeiting coloring layer, and the anti-counterfeiting mark such as a pattern, a character, a watermark or an independent color is arranged on the anti-counterfeiting coloring layer, the anti-counterfeiting mark can change along with the change of an observation angle, and the anti-counterfeiting mark such as the pattern, the character, the watermark or the independent color is invisible when the reflector plate reflects the light or is irradiated by a flash lamp, so that the anti-counterfeiting effect is achieved.
2. According to the invention, by adding special resin into the resin or ink of the anti-counterfeiting coloring layer, when the attached reflecting sheet is uncovered, the anti-counterfeiting coloring layer can be damaged and separated from layers, so that the color of the damaged part is different from that of the undamaged part, or the structure of the anti-counterfeiting coloring layer is damaged, so that the pattern cannot be recovered and can not be effectively used.
Drawings
Fig. 1 is a layered structure diagram provided in an embodiment of the present invention.
In the figure, 1-surface protection layer, 2-printing layer, 3-clamping layer, 4-transmission layer, 5-anti-counterfeiting coloring layer, 6-focus forming layer, 7-mirror reflection layer, 8-adhesive layer and 9-protective paper.
Detailed Description
The technical solutions of the present application will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an anti-counterfeit reflective sheet comprises a surface protection layer 1, a clamping layer 3, an anti-counterfeit colored layer 5, a focus forming layer 6 and a mirror reflection layer 7 which are sequentially connected from top to bottom, wherein a transmission layer 4 is arranged between the anti-counterfeit colored layer and the clamping layer, the transmission layer is a lens array combined structure composed of glass beads, the upper parts of the glass beads enter the clamping layer, the lower parts of the glass beads penetrate through the anti-counterfeit colored layer and are connected with the focus forming layer, the anti-counterfeit colored layer is connected with the clamping layer, the surface protection layer, the clamping layer and the focus forming layer are all composed of flat film-shaped resin with light transmission property, the anti-counterfeit colored layer is composed of pigment or resin, and the mirror reflection layer is a metal reflection film. The reflective sheet can perform the functions of reflection and forgery prevention by combining the surface protective layer 1, the sandwiching layer 3, the transmission layer 4, the forgery prevention coloring layer 5, the focus forming layer 6, and the specular reflection layer 7, and for convenience of attachment and protection, an adhesive layer 8 may be provided on the surface of the specular reflection layer 7, and a protective paper may be provided on the surface of the adhesive layer 8.
The film-like resin of the surface protective layer 1 includes at least one of acrylic resin, alkyd resin, fluororesin, vinyl chloride resin, polyester, polyurethane resin, and polycarbonate, and acrylic resin, polyester, and vinyl chloride resin are more suitable from the viewpoint of weather resistance and processability; the acrylic resin is more suitable in consideration of the degree of suitability for painting, the dispersibility of the colorant for coloring, and the like. In addition, in order to improve other performances of the surface protective layer, additives such as an ultraviolet absorber, a stabilizer, a plasticizer, a crosslinking agent, and the like may be added to the resin as necessary. The surface protective layer may be colored or colorless and transparent, and colorless and transparent are the most preferable, and the coloring is satisfactory.
The pigment-based or dye-based colorants suitable for coloring the surface protective layer 1 are as follows:
yellow: colorants such as isoindolinone-based, quinophthalone-based, anthraquinone-based, pyrazolone-based, flavanthrone-based, benzimidazolone-based, and azonickel-based colorants; red: anthraquinone system, perylene system, quinacridone system, indigoid system, etc.; blue color: phthalocyanine system, vat dye system, anthraquinone system, cobalt system, etc.; the green colorant includes phthalocyanine series, emerald series, chromium oxide series, cadmium series, etc.; brown color: iron oxide based colorant, or a combination of isoindolinone based yellow colorant, perylene based red colorant and phthalocyanine based blue colorant. Orange color: the single color includes anthraquinone, pyrazolone, perinone, perylene, quinacridone, and optionally isoindolinone yellow colorant and perylene red colorant; white: phthalein, zinc, and lead colorants; black: carbon black, aniline black, perylene black, titanium black.
The resin used for forming the surface protection layer can be applied to the holding layer 3 and the anti-counterfeiting coloring layer 5, and the anti-counterfeiting coloring layer can also be formed by powder pigment, wherein the anti-counterfeiting coloring layer is formed by organic pigment or inorganic pigment, the organic pigment is selected from one of azo pigment and phthalocyanine pigment, and the inorganic pigment is selected from one of metal oxide pigment, ferrous ferricyanide pigment, ultraviolet luminescent colorant and light storage luminescent colorant. The ultraviolet ray luminescent colorant includes alkaline earth aluminum acids, metal sulfide, silicon and other ultraviolet ray luminescent colorants. The light-storing and light-emitting colorant comprises light-storing and light-emitting colorants such as alkaline earth aluminum acids, metal sulfides and the like. The colorant of the surface protective layer may be used as a powdery pigment. In addition, in order to prevent the tamper-proof reflective sheet from being tampered after use, a silicone resin or a norbornene resin may be added to the material of the tamper-proof colored layer, and when the attached tamper-proof reflective sheet is peeled off, the tamper-proof colored layer is separated from the sandwiching layer and the peeled microbead layer, thereby achieving the tamper-proof purpose of the tamper-proof reflective sheet.
A transmission layer 4 is arranged between the clamping layer 3 and the anti-counterfeiting coloring layer 5, and the transmission layer is formed by arranging glass beads, wherein the glass beads are formed by at least one of glass, ceramics, polymers and ores, and the glass beads have any shape with a refraction function, such as a spheroid and a hemispheroid. More than half of the thickness of the glass beads enters the clamping layer, the upper height and the lower height of the glass beads are used as the thickness, and more than half of the height of the glass beads is inserted into the clamping layer. In addition, the filling rate of the glass beads in the clamping layer is 60-90%, the thickness of the anti-counterfeiting coloring layer is 0.1-10% of the thickness of the transmission layer, the anti-counterfeiting coloring layer is controlled to be 0.1% or more of the thickness of the transmission layer 4, more sufficient color development can be achieved, and more sufficient color change effect can be achieved by controlling the thickness of the anti-counterfeiting coloring layer to be 10% or less, so that the anti-counterfeiting effect can be well played. The anti-counterfeiting coloring layer is formed by a coating mode, the coating thickness is less than 1 μm, and the coating mode is suitable as long as the coating thickness can be controlled within 1 μm, such as gravure coating, portrait spray coating, screen printing coating and the like. In addition, since the colored layer is in the product, the pattern or watermark applied to the forgery-preventing colored layer is irreversible and cannot be removed by solvent wiping.
The focusing layer 6 is attached with glass beads which also serve to fix the focusing layer for adjusting the distance from the surface of the fine glass beads to the mirror reflection, and resins constituting the protective surface layer can be used for the focusing layer, and the focusing layer can be colored in the same manner as the surface protective layer.
The specular reflection layer 7 has a layered structure made of metal such as aluminum, copper, or silver, and is formed by vacuum deposition, for example. The specular reflection layer is opposed to and spaced apart by the focus forming layer at a certain distance, and forms a reflection area on a surface of the specular reflection layer. The adhesive layer 8 and the protective paper 9 are provided on the surface of the reflective sheet, which facilitates the adhesion and protection of the reflective sheet. The adhesive layer 8 is a layer provided for attaching the retroreflective sheet to another object, and may be made of an alkaline adhesive; the protective paper 9 is a paper which functions as a protective adhesive layer before the retroreflective sheet is attached to another object, and is formed by laminating a paper with a polyethylene resin and then peeling off one side thereof with silicone or the like. And the anti-fake dyed layer can take place the change of colour along with the difference of observation angle under different light sources, light, when retro-reflective light front observation or shooing, colour or pattern are very difficult to see, and its principle is as follows:
as shown by a dotted line in fig. 1, when an incident light L1 enters from the surface-protecting layer side, it reaches the glass beads, is refracted by the glass beads, is reflected by the specular reflection layer, is refracted again by the glass beads, and exits from the surface-protecting layer side, and at this time, the light exits in the direction almost the same as the incident direction, and the light L1 retroreflects in this manner. Because the anti-fake dyed layer has caused the thickness of anti-fake dyed layer inhomogeneous because of the reason of previous layer structure when coloring, the glass microballon is different in the central point position of focus formative layer, anti-fake dyed layer is thinner, and glass microballon is thick in the place that does not fill glass microballon on all around and the clamping layer, it is thin that retroreflection's light gets into anti-fake dyed layer when naked eye observes at front 90 (L1 light), the light of L3 is diffuse reflection again, so the colour vision is weak, when the inclined plane is seen (light L2) get into anti-fake dyed layer with retroreflection's light entering of mode like this and be thicker than front 90 when seeing, so the colour of seeing is darker than L1. In addition, when the anti-counterfeiting reflector plate irradiates the light of colorless light at night, most of the reflected light returning to the light is retro-reflected light, and the light returning to the light after being reflected by the anti-counterfeiting coloring layer is only a few. Therefore, the reflected light returning to the lamp light is hardly affected by the forgery prevention coloring layer, and is almost colorless light as long as any one of the surface protective layer, the holding layer, and the focus forming layer is not colored or is colored slightly. And the anti-counterfeiting reflector plate can emit light rays from different directions in the daytime. Therefore, when the anti-counterfeit reflective sheet is observed in daytime, the observer receives a large amount of light reflected from the anti-counterfeit colored layer. The light reflected by the mirror reflection layer is the light in the reflection wavelength band of the anti-counterfeiting coloring layer. Therefore, the color of the forgery prevention coloring layer is seen to be darker, the thickness of the forgery prevention coloring layer 50 is different when the angle is different, and the effect of returning to the naked eye is also different. Thereby realized anti-fake dyed layer under different light sources, light, along with the different colour of angle changes, when retroreflection light front observation or shooing, colour or pattern are the effect of hardly seeing.
In addition to the above-described layered structure, the anti-counterfeit reflective sheet may be provided with a printed layer 2 between the surface protective layer and the sandwiching layer, the printed layer 2 being a colored ink layer, and sometimes having light-transmitting properties and sometimes having light-opaque properties, and if opaque, the printing is partial and not all of the surface of the product. When the printing layer 2 is transparent, the pattern of the printing layer emerges as the color of the printing layer in the light reflected at night, and when the printing layer is opaque, the light reflected at night is blocked by the printing layer, so that the pattern of the printing layer emerges as a shadow.
The technical solution of the present invention will be further described by specific examples, wherein the glass beads are described as tiny glass beads, the glass beads with other shapes and transmission function are not described herein, and in addition, because the raw materials for forming the surface protection layer, the clamping layer, the anti-counterfeiting coloring layer, the focus forming layer, the mirror reflection layer and the adhesive layer can meet the requirements within the range defined by the present invention, and the different raw materials have good or bad effects, but can achieve the anti-counterfeiting requirement even though the effect is the worst, therefore, in the following different examples, only the same raw material is used as the test, the other raw materials are not described herein, in addition, the printing layer is only used for decoration, so that the product can have various patterns and colors, thereby forming different varieties, and has no obvious substantive effect in the present example, are not described in detail in the following embodiments.
Example 1
Engineering base material: a transparent polyethylene terephthalate film (trade name: TetoronFilmS-75, Kitiki Co., Ltd.) having a thickness of 75 μ was used;
surface protective layer: a resin complex liquid for forming a surface protective layer was prepared by stirring and mixing 100 parts by weight of an acrylic resin solution (trade name: RS-1200, enchei chemical limited), 16 parts by weight of a methylated melamine resin solution (trade name: NIKALACMS-11, sanwachemciclco., LTD.), 6 parts by weight of a cellulose derivative (trade name: CAB, tokushikico., LTD.), 1.5 parts by weight of an ultraviolet absorber (trade name: Seesorb103, shipirokaseiseiseisaica haco., LTD.), 0.05 parts by weight of a leveling agent (trade name: BYK-300, BYK-chemie japan kk), 0.12 parts by weight of a catalyst (trade name: ckbedeinep-198, DIC corporation) and 16.7 parts by weight of a solvent (MIBK/toluene 8/2), and the resin complex liquid was coated on an engineering substrate film and dried to form a surface protective layer having a thickness of about 40 μ;
a clamping layer: a resin compounding liquid for forming a holding layer was prepared by mixing and stirring 100 parts by weight of an acrylic resin (trade name: RS-3000, enzhikii chemical limited), 18 parts by weight of a color base (trade name: AR-6300, tokushikico, Ltd.), 13 parts by weight of an isocyanate-based cross-linking agent (trade name: SumijouleN-75, sumika bayer urethane, Ltd.) and 21 parts by weight of toluene and 14 parts by weight of MIBK as a solvent, and then applied to a surface protection layer, followed by drying at 70 ℃ for 5 minutes to form a holding layer having a thickness of about 30 μm;
a transmission layer: a fine glass bead (trade name: NB-23S, en xi ai chemical limited) was attached to the sandwiching layer, and heat-treated to immerse the fine glass bead in the sandwiching layer in such a manner that the fine glass bead was exposed from the sandwiching layer, and approximately 75% of the diameter of the fine glass bead was held in the sandwiching layer.
Anti-counterfeiting coloring layer: the interlayer and the fine glass beads were colored with a solvent-based ink-jet printer (trade name: JV33-130, MIMAKI Co., Ltd.), and NCI black letters and LOGO, a blue-color Ensiei chemical Co., Ltd., were sprayed on the interlayer and the fine glass beads to form a forgery-preventing colored layer.
Focal layer formation: a resin mixture liquid for a focus forming layer was prepared by mixing and stirring 100 parts by weight of an acrylic resin solution (trade name: RS-5000, en sie chemical limited), 5.5 parts by weight of a methylated melamine resin solution (trade name: NIKALACMS-11, sanwachemcalo., LTD.) and 39.3 parts by weight of a solvent (MIBK/toluene 4/6), and the resin mixture liquid was applied onto a holding layer and a fine glass bead and dried to form a focus forming layer having an average thickness of about 20 μm.
Specular reflection layer: aluminum was vacuum-evaporated over the focus forming layer, thereby obtaining a specular reflection layer.
Adhesive layer: an adhesive layer having a thickness of about 40 μm was formed by stirring and mixing 100 parts by weight of an ethyl acetate copolymer solution of butyl acrylate BA/acrylic acid AA (ethyl acetate/toluene = 1/1), 9 parts by weight of a white colorant (trade name: AR-9127W, tokushikico, Ltd.), 0.5 parts by weight of an isocyanate-based crosslinking agent (trade name: coronatl, nippon polyurethane electronic and co., Ltd.) and 16.1 parts by weight of ethyl acetate as a solvent, and coating the resin mixture solution on a release film (trade name: E2P-h (p), lineteccorporation) and drying.
Next, after the specular reflection layer and the adhesive layer were bonded, the engineered substrate was peeled off, thereby obtaining a forgery-preventing reflection sheet having an adhesive layer.
In this embodiment, trade names and manufacturers are given for raw materials used for the anti-counterfeit reflective sheet, but the trade names and the manufacturers do not have a limiting effect, and do not mean that only the raw materials of the type produced by the manufacturers can meet requirements, but have a general marking effect, and any resin or additive of the same type that can meet the basic performance requirements of the anti-counterfeit reflective sheet can be used as the raw materials.
Example 2
In this embodiment, the process is the same as that of embodiment 1 except that the coloring method of the anti-counterfeiting coloring layer is changed to a gravure coating method, and NCI black characters and LOGO of blue-enchia chemical company ltd are printed.
Example 3
In this embodiment, except that the coloring method of the anti-counterfeit coloring layer is changed to a gravure coating method, NCI black characters and LOGO of blue enchia chemical limited company LOGO are printed, and silicone resin (with a density of 0.99g/cm3 and a viscosity of 128mm 2/s) is added to the ink of the anti-counterfeit coloring layer in a proportion of 10% by weight of the ink of the anti-counterfeit coloring layer (0.1 to 90% by weight of the ink may be added, and norborneol resin with a density of 1 to 1.1g/cm3 may be added to achieve the same effect), the other steps are the same as those of embodiment 1.
Example 4
In this embodiment, the process is the same as that of embodiment 1 except that the coloring method of the anti-counterfeit coloring layer is changed to a screen printing coating method, and NCI black characters and LOGO of blue-enchia chemical ltd are printed.
Comparative example 1
In this comparative example, the same as example 1 was conducted except that the forgery prevention coloring layer in example 1 was removed, a solvent ink jet printer JV33-130 manufactured by MIMAKI was used between the surface protective layer and the interlayer to color the interlayer, and NCI black characters and LOGO, a chemical Co., Ltd.
Comparative example 2
In this comparative example, the same as example 1 was conducted except that the forgery prevention coloring layer in example 1 was removed, the surface of the interlayer not in contact with the surface protective layer and the fine glass beads were colored with a solvent ink jet printer JV33-130 manufactured by MIMAKI corporation, and NCI black characters and LOGO, a chemical Co., Ltd.
Comparative example 3
In this comparative example, the same as example 1 was conducted except that the forgery prevention coloring layer in example 1 was removed, the surface of the interlayer not in contact with the surface protective layer and the fine glass beads were colored with a solvent ink jet printer JV33-130 manufactured by MIMAKI corporation, and NCI black characters and LOGO, a chemical Co., Ltd.
In addition to the removal of the forgery-preventing colored layer 50 in example 2, a solvent ink jet printer, JV33-130, manufactured by MIMAKI corporation, was used between the focus forming layer 60 and the specular reflection layer 70 to color the focus forming layer, and NCI black letters and LOGO, a blue-en-siei chemical company, ltd, were sprayed. The same process as in example 2 was repeated except that a reflective sheet was produced.
The anti-forgery performance of example 1 and comparative examples 1 to 3 were compared.
The test method comprises the following steps: under the common light, the black NCI characters and LOGO of blue Enxi ai chemical company are observed in the front and the side, and whether the color has obvious shade change is seen, which is called method one for short.
And a second testing method comprises the following steps: and opening a camera with a flash function, and using flash to photograph black NCI characters and LOGO of blue Enxi ai chemical industry Co., Ltd. to see whether the picture is obviously visible or not, which is called method II for short.
The third test method comprises the following steps: and (3) turning on a tool with a light source, and observing whether black NCI characters and LOGO of blue Enxi ai chemical company are obviously visible or not in front, namely a method III.
The test method four comprises the following steps: the front side and the side of the common flashlight are irradiated, black NCI characters and LOGO of blue Enxi ai chemical company Limited are observed at the same position by naked eyes and flashlight light, and whether the color has obvious shade change or not is seen, which is called method four for short.
The anti-counterfeit performance of example 1 and comparative examples 1 to 3 were compared by the above-described test method, and the results are shown in the following table.
The product of example 3 was also attached to an aluminum plate, and after 24 hours, the attached product was peeled off, whereupon it was found that the anti-counterfeiting layer was separated, the color was different, the pattern was destroyed, and the product could no longer be used, thus preventing the product from being completely peeled off and attached to another place.
In the above embodiments, a printing layer may be further disposed between the surface protection layer and the clamping layer according to requirements, and the printing layer may enable the product to have various patterns and colors, so as to form different types.
As described above, the present invention can provide an excellent forgery-proof retroreflective sheet that cannot be copied and can be used for traffic signs, engineering signs, commercial signs, license plates, retroreflective labels, and retroreflective RFID (radio frequency identification) tags.
Claims (7)
1. The utility model provides an anti-fake reflector plate, includes surface protection layer, clamping layer, focus cambium and the specular reflection layer that from top to bottom sets up, clamping layer and focus cambium between be provided with the transmission layer, the transmission layer be the lens array integrated configuration that glass bead constitutes, surface protection layer, clamping layer and focus cambium constitute by the film form resin that has light-transmitting property, the specular reflection layer be metal reflective film, its characterized in that: an anti-counterfeiting coloring layer is arranged between the clamping layer and the focus forming layer, one end of the glass bead enters the clamping layer, the other end of the glass bead penetrates through the anti-counterfeiting coloring layer to be connected with the focus forming layer, and the anti-counterfeiting coloring layer is not completely connected with the clamping layer and the focus forming layer; the anti-counterfeiting coloring layer is made of film-shaped resin with light transmission property, the thickness of the anti-counterfeiting coloring layer is 0.1% -10% of the thickness of the transmission layer, the anti-counterfeiting coloring layer is uneven in thickness, the glass beads are positioned at the central point of the focus forming layer, the anti-counterfeiting coloring layer is thin, and the peripheries of the glass beads and the positions, which are not filled with the glass beads, on the clamping layer are thick; the anti-counterfeiting coloring layer is formed by a coating or printing mode, the coating or printing thickness is less than 1 mu m, and the coating mode is selected from gravure coating, portrait spray coating and screen printing coating; patterns, characters and watermarks are arranged on the anti-counterfeiting coloring layer, the patterns, the characters and the watermarks change along with the change of an observation angle, and the patterns, the characters and the watermarks arranged on the anti-counterfeiting coloring layer are invisible when the anti-counterfeiting coloring layer reflects back or is irradiated by a flash lamp.
2. A tamper-resistant reflective sheet according to claim 1, wherein: at least one of silicone resin or norbornene resin is added into the anti-counterfeiting coloring layer, and the adding proportion is 0.1-90% of the weight ratio of the anti-counterfeiting coloring layer.
3. A tamper-resistant reflective sheet according to any one of claims 1 or 2, wherein: more than half of the thickness of the glass beads enters the clamping layer, and the filling rate of the glass beads in the clamping layer is 60-90%.
4. A tamper-resistant reflective sheet according to claim 1, wherein: the glass beads are composed of at least one of glass, ceramics, polymers and ores, and are in any shape with refraction function.
5. A tamper-resistant reflective sheet according to claim 4, wherein: at least one of the surface protection layer, the clamping layer and the focus forming layer is colored by a colorant, and the color of at least one of the surface protection layer, the clamping layer and the focus forming layer is the same as that of the anti-counterfeiting coloring layer.
6. A tamper-resistant reflective sheet according to claim 5, wherein: the surface protection layer is colorless and transparent.
7. A method of making an anti-counterfeiting reflective sheet according to claim 1, comprising the steps of:
coating a clamping layer on one surface of the surface protection layer, placing glass beads on the clamping layer, enabling part of the glass beads to enter the clamping layer through surface tension, and adjusting the depth of the glass beads entering the clamping layer through adjusting the hardening state of the clamping layer; after the clamping layer is completely hardened and the glass beads are fixed, arranging an anti-counterfeiting coloring layer on the clamping layer provided with the glass beads; and sequentially placing the focus forming layer and the mirror surface reflecting layer to form the anti-counterfeiting reflecting sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/083103 WO2017201665A1 (en) | 2016-05-24 | 2016-05-24 | Anti-counterfeit reflective sheet and manufacturing method thereof |
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| CN109313293A CN109313293A (en) | 2019-02-05 |
| CN109313293B true CN109313293B (en) | 2021-12-28 |
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| WO (1) | WO2017201665A1 (en) |
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| CN108659730B (en) * | 2018-07-09 | 2024-01-30 | 浙江龙游道明光学有限公司 | Hollowed-out anti-counterfeiting glass bead type reflective film and manufacturing method thereof |
| CN110591451B (en) * | 2019-09-16 | 2022-05-31 | 湖南工业大学 | Reflective anti-counterfeiting ink and preparation method and application thereof |
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| JP5929013B2 (en) * | 2011-05-25 | 2016-06-01 | 凸版印刷株式会社 | Colored anti-counterfeit structure and colored anti-counterfeit medium |
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| CN203054255U (en) * | 2012-09-17 | 2013-07-10 | 恩希爱(杭州)化工有限公司 | Lens type packaging reflective slice |
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| CN101116015A (en) * | 2005-02-10 | 2008-01-30 | 日本电石工业株式会社 | Retroreflection sheet |
| CN101680977A (en) * | 2007-06-19 | 2010-03-24 | 株式会社丸仁 | Iridescent reflected light emitting retroreflective material |
| EP2295241A1 (en) * | 2008-06-30 | 2011-03-16 | Shanghai Fudan Techsun New Technology Co. Ltd. | Security film and process for preparation thereof |
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| WO2017201665A1 (en) | 2017-11-30 |
| CN109313293A (en) | 2019-02-05 |
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