CN109285439A - A kind of graphic anti-counterfeiting structure and preparation method thereof based on microlens array - Google Patents
A kind of graphic anti-counterfeiting structure and preparation method thereof based on microlens array Download PDFInfo
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- CN109285439A CN109285439A CN201811115548.5A CN201811115548A CN109285439A CN 109285439 A CN109285439 A CN 109285439A CN 201811115548 A CN201811115548 A CN 201811115548A CN 109285439 A CN109285439 A CN 109285439A
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- microlens array
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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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
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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
- G09F2003/0208—Indicia
- G09F2003/0213—Concealed data
Abstract
The graphic anti-counterfeiting structure based on microlens array that the invention discloses a kind of, including the substrate layer being cascading, micro- picture and text layer and gum layer, micro- picture and text layer includes the structure sheaf stacked gradually, metal layer and ink layer, structure sheaf side is close to substrate layer, the other side is provided with the concaveconvex structure containing graph text information, has aluminium layer on the concave face (crowning) of concaveconvex structure, the crowning (concave face) of ink layer adjacent relief structure is arranged, and it fits with the aluminium layer of concave face (crowning), aluminium layer and ink layer are compared the picture and text structure for highlighting structure sheaf, it is formed in the hollow out effect of local aluminizing in concaveconvex structure.The invention also discloses the preparation methods of the graphic anti-counterfeiting structure.Technical solution of the present invention is directed to the situation of current micro- picture and text structural printing effect difference, is designed using two-stage concaveconvex structure, and compares protrusion to concaveconvex structure using different coatings, in conjunction with microlens array, effectively increases the security performance of graphic anti-counterfeiting film.
Description
Technical field
The invention belongs to security devices fields, and in particular to a kind of graphic anti-counterfeiting structure and its system based on microlens array
Preparation Method.
Background technique
For microlens array by the array that clear aperature and relief depth are that micron-sized lens form, it not only has biography
The basic functions such as focusing, the imaging of system lens, and have the characteristics that unit size is small, integrated level is high, it allows it to complete
The impossible function of traditional optical elements, and many novel optical systems can be constituted.For example, microlens array is applied to
On micro- picture and text, using lenticule and mole amplifying technique, corresponding miniature picture and text is amplified, by design, people can be showed
The clear picture and text of the visible amplification of eye, and have dynamic and Deep Canvas.In practice, microlens array is usually applied to micro- figure
Literary anti-counterfeit field.It has the characteristics that process is complicated, difficulty is high and ordinary populace easily identifies, and is expected to become a new generation's height
Hold the mainstream technology scheme of public anti-counterfeiting technology.Banknote, identity document, marketable securities and other items are had been widely used at present,
Such as dollar, won, the bank note safety lines such as Mexico's coin, Danish Krone, Chilean Peso, sterling.
Specifically, microlens array reproduces in micro- picture and text technical products, generally comprises micro-lens arrays layer and picture and text layer.
As most important optical element layer, the optical characteristics of micro-lens arrays layer determine the performance of entire security devices.Usual feelings
Under condition, in field of anti-counterfeit technology, especially micro- graphic anti-counterfeiting technical field, the structure of micro- picture and text is very pleasantly surprised, strokes of characters
Thickness even can achieve 5 microns hereinafter, word is up to 20 microns or less.In actual preparation process, micro- picture and text it is this
The limit of the size far beyond conventional printing techniques.For this problem, holographic lithography is usually used in the prior art
The product for preparing micro- picture and text, but being prepared with this method, effect of aluminizing is poor, and the contrast of micro- picture and text is insufficient,
The effect pattern that product finally shows is not clear enough.And aiming at the problem that micro- picture and text contrast itself, it adopts in the prior art
The method for having taken colored print.Specifically it is exactly very low power completion method, micro- image-text area is made into groove structure, then
Colored ink is filled into groove.But this preparation method is filled by ink and the requirement of printing technology is all very high, it is practical
Operation in control difficulty it is also very big.
Summary of the invention
Aiming at the above defects or improvement requirements of the prior art, the present invention provides a kind of picture and text based on microlens array
Anti-counterfeit structure and preparation method thereof at least can partially solve the above problems.Technical solution of the present invention is directed to current micro- picture and text knot
Structure printing effect is poor, the bad situation of picture and text effect, is designed using two-stage concaveconvex structure, and is tied using different coatings to bumps
Structure compares protrusion, in conjunction with microlens array, effectively increases the security performance of graphic anti-counterfeiting film.
To achieve the above object, according to one aspect of the present invention, it is anti-that a kind of picture and text based on microlens array are provided
The preparation method of pesudo-structure, which is characterized in that including,
UV curing materials or thermoplastic resin dope are uniformly coated on substrate layer side by S1, are pressed on the coating layer by UV
Print or the mode of hot padding, imprint out concaveconvex structure that is equally distributed, including graph text information, form structure sheaf；
S2 is equably coated with one layer of volatile layer on the crowning of concaveconvex structure, is not coated with volatile layer on concave face, described
Volatile layer is coated with by volatile materials and is formed, and has volatility；
S3 has metal layer without the area deposition of silicone oil in the upper deposited metal layer of structure sheaf concaveconvex structure, coating
There is the region of silicone oil not deposited metal layer, to obtain the engraved structure of concave face deposited metal layer, crowning not deposited metal layer；
S4 full version printing ink layer on the basis of metal layer, assigns the structure sheaf of no metal layer covering with color, from
And it is observed that coloured, the sharp-edged figure of tool is collectively formed in structure sheaf, metal layer and ink layer in substrate layer side
Literary message structure；
S5 prepares gum layer on ink layer, obtains graphic anti-counterfeiting structure.
One as technical solution of the present invention is preferred, wherein further include, it is solid in the other side even spread UV of substrate layer
Change material and obtain second coating, microlens array, the microlens array are formed in the second coating by nano impression
Match with the concaveconvex structure of structure sheaf, so that the concaveconvex structure shows more beautiful effect, enhances antifalsification.
According to the one aspect of technical solution of the present invention, a kind of graphic anti-counterfeiting structure based on microlens array is provided
Preparation method, which is characterized in that including,
UV curing materials or thermoplastic resin dope are uniformly coated on substrate layer side by S1 ', pass through UV on the coating layer
Coining or hot padding mode, imprint out include graph text information concaveconvex structure, formed structure sheaf；
S2 ' is equably coated with one layer of volatile paint to sustained height in the upper of concaveconvex structure, and it is big to form recess face thickness,
The small volatile layer of raised face thickness；
S3 ' deposited metal layer on structure sheaf concaveconvex structure, volatile layer volatilization is completely on crowning and formation is certain thick
Volatile layer is not yet evaporated completely full-time stopping deposition on the aluminium layer of degree, concave face, obtains crowning deposited metal layer, concave face does not sink
The engraved structure of product metal layer；
S4 ' full version printing ink layer on the basis of metal layer, assigns the structure sheaf of no metal layer covering with color, from
And it is observed that coloured, the sharp-edged figure of tool is collectively formed in structure sheaf, metal layer and ink layer in substrate layer side
Literary message structure；
Gum layer is coated on ink layer by S5 ', obtains graphic anti-counterfeiting structure.
One as technical solution of the present invention is preferred, wherein further include, it is solid in the other side even spread UV of substrate layer
Change material and obtain second coating, microlens array, the microlens array are formed in the second coating by nano impression
Match with the concaveconvex structure of structure sheaf, so that the concaveconvex structure shows more beautiful effect, enhances antifalsification.
According to the one aspect of technical solution of the present invention, a kind of any one preparation according to claim 1~4 is provided
The graphic anti-counterfeiting structure that method prepares, including the substrate layer, micro- picture and text layer and gum layer being cascading, wherein institute
Substrate layer is stated as outermost protective layer, the glue-line with marker surface for being bonded, which is characterized in that
Micro- picture and text layer includes the structure sheaf, metal layer and ink layer stacked gradually, and the structure sheaf side is close to base
Material layer, the other side are provided with the concaveconvex structure containing graph text information, have aluminium layer, ink layer on the concave face of the concaveconvex structure
The crowning of adjacent relief structure is arranged, and fits with the aluminium layer of concave face；Or
Micro- picture and text layer includes the structure sheaf, metal layer and ink layer stacked gradually, and the structure sheaf side is close to base
Material layer, the other side are provided with the concaveconvex structure containing graph text information, have aluminium layer, ink layer on the crowning of the concaveconvex structure
The concave face of adjacent relief structure is arranged, and fits with the aluminium layer of concave face；
By this method, the aluminium layer and ink layer are compared the picture and text structure for highlighting structure sheaf, are formed in concave-convex knot
The hollow out effect of local aluminizing, can be improved the antifalse effect of graph text information in structure.
One as technical solution of the present invention is preferred, and graphic anti-counterfeiting structure further includes micro-lens arrays layer, with micro- figure
Literary layer is separately positioned on substrate layer two sides；The micro-lens arrays layer includes multiple micro lens arranged in the form of an array.
One as technical solution of the present invention is preferred, and the upper and lower surfaces difference in height of concaveconvex structure is that 0.3-5 is micro-
Rice.
One as technical solution of the present invention is preferred, and the focal length of the micro lens of multiple array arrangements is preferably equal.
Preferably as one of technical solution of the present invention, the arrangement period of microlens array preferably with micro- picture and text of structure sheaf
Match.
One as technical solution of the present invention is preferred, and the thickness of base membrane layer and the focal length of micro lens match, described
Concaveconvex structure is preferably located exactly in the focus of micro lens.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, have below beneficial to effect
Fruit:
1) technical solution of the present invention increases microlens layer on substrate layer, wherein including multiple micro lens, lens
Array is corresponding with the concaveconvex structure that the substrate layer other side includes graph text information, i.e., each micro lens correspond to one it is recessed
Male structure, and concaveconvex structure is located on the focal length of corresponding micro lens, it, can be preferably under the optical effect of micro lens
Graphic anti-counterfeiting information included in concaveconvex structure is showed, so that film has better antifalse effect.
2) technical solution of the present invention, graph text information region and background area are in different height, and information area and back
Scene area can respectively with ink or be lined with aluminium layer, using this characteristic, can locally sink on the concaveconvex structure of structure sheaf
Product aluminium layer, prints ink on the structure sheaf of not aluminium layer, the micro- graph text information of colour of metal layer part obtained hollow out,
Under the action of microlens array, the dynamic colored picture and text antifalse effect of floating or sinking is showed.
3) technical solution of the present invention can be sketched the contours of accurately recessed in such a way that volatile layer controls local deposited metal layer
The edge boundary of male structure, under the comparison of ink layer and metal layer, micro- picture and text obtained it is clear in structure, beautiful in colour,
Visual art with higher, anti-counterfeit capability is stronger, and preparation method is relatively easy, is easy mass production.
Detailed description of the invention
Fig. 1 is the structure chart of graphic anti-counterfeiting film in the embodiment of technical solution of the present invention；
Fig. 2 is the preparation flow figure of graphic anti-counterfeiting film in the embodiment of technical solution of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.The present invention is described in more detail With reference to embodiment.
Fig. 1 is the structure sectional view of safe-guarding and anti-counterfeiting film.As shown in fig. 1, the holographic anti-counterfeiting hot stamping film include on to
Under the micro-lens arrays layer 2, substrate layer 1, micro- picture and text layer 3 and the gum layer 4 that are sequentially overlapped, wherein micro- picture and text layer includes that micro- picture and text are recessed
Male structure layer 31, aluminium coated 32 and ink layer 33.
Substrate layer 1 is between micro-lens arrays layer 2 and micro- picture and text layer 3, substrate layer preferably clear film, and the transparency provides
The feasibility of micro- picture and text is observed from microlens array, while the thickness of film and the focal length of microlens array match, it is considerable
Measure the micro- picture and text clearly amplified.Wherein, small deviation can occur relative to the period of micro- picture and text for microlens array, can shape
At the sinking and floating effect of micro- picture and text, to further increase the antifalse effect of graphic anti-counterfeiting structure.
In the present embodiment, the transparent membranes such as substrate layer preferred PET, PP, PEN.Micro-lens arrays layer 2 can provide lenticule
Enlarging function amplifies processing to graph-text content, and the bore D of the lenticule in the present embodiment is 10~200 microns, and preferably 10
~50 microns；The focal length of lenticule is 10-100 microns preferred.
As the preferred of the present embodiment, micro- picture and text layer 3 includes micro- picture and text concave-convex structure layer 31 (i.e. structure sheaf 31), aluminium coated
32, ink layer 33.The concave-convex structure layer preferably clear coating of micro- picture and text, and include the micro- image-text area and back of graph text information
The height of scene area is different, and micro- image-text area can be protrusion, is also possible to concave.When micro- image-text area is protrusion,
There is aluminium coated on background area surface, and micro- image-text area is without aluminium coated.
At coating metal layer (i.e. aluminium layer 32), in the present embodiment preferably on the concave face of concaveconvex structure coating metal
Layer, is not coated with metal layer on the crowning of concaveconvex structure, so that concaveconvex structure can show a kind of effect of hollow out.
On this basis, it can further be coated with ink layer on the metal layer, in this case, do not have the position of metal layer just on structure sheaf
The color effects of ink layer can be showed, to look over from substrate layer side, structure sheaf, metal layer and ink layer entirety structure
At the graphic anti-counterfeiting structure in the present embodiment, and graph text information accuracy is high, and color is uniform, have preferable appreciation effect and
Antifalse effect.
That is, ink layer further imparts micro- on the basis of the part of metal layer deposits to form hollow out effect
Picture and text color.When micro- image-text area is concave, the sunk area (concave face on structure sheaf) of concaveconvex structure includes figure
Literary information, background area (crowning i.e. on structure sheaf) is without aluminium coated.That is, micro- image-text area has metal layer, ink
Layer assigns background area color.And when micro- image-text area is protrusion, graph text information is located at the crowning of concaveconvex structure at this time
(i.e. the crowning of structure sheaf), background area surface (i.e. the concave face of structure sheaf) have an aluminium coated, micro- image-text area without aluminium coated,
Ink layer assigns non-background area color.In the present embodiment, as needed, ink used in ink layer includes multiple color,
Such as white, blue, black, red.In conjunction with three-decker, from microlens array unilateral observation graphic anti-counterfeiting film, Ke Yiguan
Observe the micro- picture and text of the colorful one.
It further, not only can be respectively in the crowning of structure sheaf or recess comprising graph text information in the present embodiment
(or perhaps characters cut in relief printing or characters cut in intaglio printing) is presented on face, metal layer can also be realized by the design of volatile layer and tied
It is deposited on the crowning of structure layer concaveconvex structure either concave face.The setting form of above-mentioned graph text information and the deposition shape of metal layer
Formula is arranged in pairs or groups respectively is formed by graphic anti-counterfeiting film, in the open scope of the present embodiment.
As the preferred of the present embodiment, gum layer 4 is in the lower side of membrane body, for anti-counterfeiting mark to be attached to all kinds of packets
The surface of piece installing.
As the preferred of the present embodiment, for the above product structure, preparation method is as follows:
1) focal length for determining multiple micro lens in microlens array first, selects the transparent membrane of suitable thickness, thick
It spends and matches with the focal length of microlens array.Specifically, the focal length of the thickness of transparent membrane and micro lens, film thickness with
And the thickness of concaveconvex structure has close relationship.In the present embodiment, preferably guarantee micro- picture and text layer when selecting the film of substrate layer
Concaveconvex structure and micro lens match, be preferably located exactly under the focal length of micro lens, it is highly preferred that miniature
When mirror and concaveconvex structure have certain dislocation, it is possible to have good visual effect.Further, as the film of substrate layer
It can choose coloured or colorless and transparent film.
2) by way of UV nano impression, microlens array structure is formed on the first surface of substrate layer.Lenticule
The preparation method comparative maturity of array is preferably directly prepared using UV nano-imprinting apparatus on substrate layer in the present embodiment.It should
The period of production process, microlens array and micro- picture and text and angle determine the magnification level and dynamic effect of micro- texts and pictures.It is micro-
Lens array layer is substantially exactly that multiple micro lens are distributed according to certain rule, can be set according to specific picture and text structure
Meter requires to be adjusted.Simultaneously as micro-lens arrays layer and micro- picture and text layer are located at the two sides of substrate layer, microlens array
Preparation and the preparation of micro- picture and text layer of layer are not interfere with each other, can be during micro- picture and text layer and gum layer coating and process
Any time of front and back carries out, and is not particularly limited in the present embodiment to this.
3) second surface by the way of nano impression in substrate layer imprints out the concaveconvex structure of micro- picture and text.Nano impression
Mode can be UV coining, be also possible to hot padding, UV nano impression and hot padding are all traditional to prepare holographic copy side
Method preferably uses thermal imprint process in the present embodiment.
The technique of typical hot padding, it is preferred to use nano material made of acrylate material is coated, this
In embodiment, preferably 80~150 DEG C of coating temperature, speed preferably 60~90m/min, coating thickness is preferably 1-3 microns.Thus
It can be obtained the structure sheaf of the present embodiment, do not include the concave-convex knot of graph text information at this time there are no being imprinted in structure
Structure.
By include graph text information concaveconvex structure be impressed into structure sheaf listing, can be used holographic mould press.The present embodiment
In, preferably under the conditions of 180~240 DEG C, micro- picture and text concaveconvex structure on nickel version (mother matrix) is transferred to acrylic resin coating
On, the concaveconvex structure of micro- picture and text is formed on the structure sheaf that acrylic resin is constituted.
In addition, UV nano impression is also common micro nano structure clone method, first in the second surface of substrate layer
It is coated with one layer of UV coating, is then bonded it with the mother matrix of micro- picture and text concaveconvex structure, is separated after carrying out UV exposure with template, in this way
The micro nano structure of micro- picture and text is just formed in the second surface of substrate layer.In the present embodiment, hot padding and UV nano impression are only made
The formation of structure sheaf concaveconvex structure is illustrated for specific embodiment, is not intended as to concrete restriction of the invention.In fact,
There are many kinds of the preparation methods of micro- picture and text concaveconvex structure mother matrix, such as mask plate photoetching, laser direct-write photoetching, photoetching and physical etchings
In conjunction with, photoetching a variety of methods such as in conjunction with chemical etching.For example, the method combined using mask plate with etching, uses light first
The instrument production film is drawn, micro- picture and text pattern is showed on the film, is then coated with a layer photoresist on the glass substrate, by exposing,
Development, cleaning, then use fluoride plasma etching, remove photoresist, obtain the concaveconvex structure of micro- picture and text.Above method
It can get structure sheaf concaveconvex structure in the present embodiment.
4) volatile layer is printed in micro- picture and text concave-convex structure layer, specifically prints and waves on the crowning of concaveconvex structure
Object is sent out, forms the effect of localised application volatile matter on structure sheaf.Volatile layer is made of volatile matter, under certain condition may be used
With volatilization.It both can be applied to identical height on the structure sheaf entirely with concaveconvex structure comprehensively, can also use one
Determine coating method to be only coated on the crowning of concaveconvex structure.In the present embodiment, volatile layer preferably uses the silicone oil for being easy to volatilize,
By the mode of printing of such as flexographic printing, the local silicon layer of 10-50nm is formed on structure sheaf.In order to realize above-mentioned effect
Fruit, in the present embodiment, the region (i.e. the projecting surface of concaveconvex structure) that micro- picture and text concave-convex structure layer protrudes above is contacted with soft version, concave
Region (concave face of concaveconvex structure) do not contacted with soft version, formed raised zones have silicon layer, depressed regions do not have silicon layer
Part printing surface.
5) after printing volatile layer, metal layer, preferably aluminium layer are plated on the surface of local silicon layer.Since volatile layer is certain
Under the conditions of gradually evaporate, the concaveconvex structure of structure sheaf is shown, to realize the arrangement of metal layer.In aforementioned two kinds of volatile layers
On the basis of coating, there are two types of the modes of vapor deposition for metal layer.One is in the case where volatile layer is applied to sustained height, due to bumps
The crowning and concave face of structure have difference in height, therefore the thickness of the volatile layer of concave face and crowning is inconsistent, protrusions
The volatile layer thickness in face is less than concave face, therefore can be complete prior to the volatile layer evaporation of concave face, and aluminium layer can deposit at this time
On the crowning of concaveconvex structure, while stopping vapor deposition before the evaporation completely of the volatile layer of concave face, crowning, which can be realized, to be had
Metal layer and concave face does not have the engraved structure of metal layer.Another kind is using certain coating method, only in the convex of concaveconvex structure
The face of rising is coated with volatile layer, and during vapor deposition, since concave face does not have a volatile layer, aluminium layer takes the lead in depositing to concave face, while
Stop vapor deposition before the volatile layer evaporation completely of crowning, can be obtained that concave face has metal layer and crowning does not have metal layer
Engraved structure.
In the present embodiment preferably by the way of vacuum evaporation, by the surface of the micro- picture and text concave-convex structure layer of metal al deposition.
Since its surface is locally printed with silicone oil, the corresponding region of silicone oil is unable to deposited aluminum layer, aluminizes effect so as to form hollow out
Fruit.It, can be real since the printed patterns of silicon layer are consistent with the concaveconvex structure (i.e. micro-structure) for including graph text information
Now precision is aluminized.At the same time, in vacuum aluminum-coated process, volatile layer is constantly volatilized, according to silicone oil volatilization condition and
Rate of volatilization, in conjunction with aluminum plating process condition, silicone oil when completing that can make to aluminize volatilizees just to be finished.
6) printing ink layer, ink layer assign micro- picture and text color.After the completion of metal layer preparation, showing for false-proof film is engraved
Empty effect.Specifically, by taking the concave face deposited metal layer of concaveconvex structure as an example, the concave face of concaveconvex structure is due to being deposited with gold
Belong to layer and has the effect of metallic reflection, and crowning does not have deposited metal layer then under the protection of silicone oil, shows substrate layer
With the color (transparent effect) of structure sheaf script.And when the crowning deposited metal layer of concaveconvex structure, the protrusion of concaveconvex structure
Face has the effect of metallic reflection due to being deposited with metal layer, and concave face does not then have metallic reflection under the protection of volatile layer
Effect shows the transparent effect of substrate layer and structure sheaf and ink layer.In the present embodiment, due to aluminium layer local deposits and
The coating of ink layer, entire graphic anti-counterfeiting film show hollow out effect, and the metallic reflecting effect of aluminium layer is presented in micro- image-text area,
Overall performance is coloured micro- picture and text.Further, according to demand, ink layer can be the face such as monochromatic, polychrome or gradual change
Color, in the protection scope of technical solution of the present invention.
7) it is coated with gum layer.According to the material and bonding process bonded, gum layer is coated in ink layer.Step 6 and seven
It can be combined into a step, using coloured gum layer, can not only show color, but also the function of bond substrates can be shown
Energy.This is not limited specifically in the present embodiment.
It is illustrated in figure 4 the specific preparation process of the graphic anti-counterfeiting film in the present embodiment, below presses exemplary description
According to the preparation method of safe-guarding and anti-counterfeiting film of the invention.
Case study on implementation one:
(1) using 30 microns of BOPET film as substrate layer 1, using lenticule coating machine, in the first surface of BOPET film
One layer of UV coating of upper coating, is bonded with the mother matrix of microlens array, removes after UV exposure curing, forms micro-lens arrays layer 2.
(2) preparation of micro nano structure template: the laser writing technology of holographic lithography machine is used first, on a photoresist directly
The pattern for writing out micro- picture and text is connect, then exposes, develop, then by electroforming, obtain micro- picture and text metallic nickel mother matrix of concaveconvex structure.It is female
Micro- picture and text are concave structure in version, and micro- graph-text content is the periodic arrangement of letter A, and the word of A is 20 microns high, Arial font, stroke
Thickness is 4 microns, and background is projective structure, and difference in height is 3 microns.
(3) using anilox roll be coated with, BOPET second surface be coated with one layer of acrylic resin, 4 microns of coating layer thickness.
(4) holographic mould press is used, under the conditions of 160~240 DEG C, by the micro-structure on metallic nickel mother matrix in heat and pressure
Under the action of, it is impressed on acrylic resin coating, is formed in acrylic resin coating surface corresponding with metal mother micro-
Picture and text concaveconvex structure, i.e., micro- picture and text are projective structure on mother matrix, and background is concave structure.
(5) attachment is printed using the silicone oil of aluminum-spraying machine, using the soft version of full version as galley, in silicone oil evaporation rate appropriate
Under, so that it is formed one layer of very thin silicon layer (i.e. volatile layer) on soft version surface.By printing, micro- image-text area of protrusion with it is soft
Plate contact, surface stamps silicone oil；Concave background area is not contacted with adagio, does not print silicone oil.
(6) by vacuum aluminum-coated, in the background area deposited aluminum layer of not silicone oil, and there are micro- picture and text of silicone oil that cannot deposit
Aluminium layer shows micro- picture and text of hollow out effect.Simultaneously under conditions of vacuum, silicone oil constantly volatilizees, and the thickness of silicon layer is continuous
It reduces, even without.
(7) reticulate pattern roll coating process is used, the ink layer of blue layer is coated on metallic aluminum.
(8) under the conditions of 180-200 DEG C, one layer of SBS hot melt adhesive is coated with using hot melt coating machine；Then die cut, point
It cuts to get a kind of safe-guarding and anti-counterfeiting film for the dynamic effect for reproducing micro- picture and text to microlens array.
Case study on implementation two:
(1) select 30 microns of transparent BOPET film as substrate layer 1；Using lenticule coating machine, the of BOPET film
It is coated with one layer of UV coating on one surface, is bonded with the mother matrix of microlens array, is removed after UV exposure curing, forms lenticule battle array
Column.
(2) prepare mask plate by the way of final minification, covered by mask plate, expose, develop after prepare the recessed of micro- picture and text
Male structure, then by electroforming, obtain micro- picture and text metallic nickel mother matrix of concaveconvex structure.Micro- picture and text are projective structure, background on mother matrix
For concave structure, difference in height is 3 microns.
(3) on substrate layer, using reticulate pattern roller coating method, one layer 5 microns of UV coating is coated on substrate layer；
(4) UV coating is bonded exposure with the mother matrix of metallic nickel, the micro nano structure in nickel version is copied on UV coating,
UV coating is changed into solid-state by liquid after exposure, and micro nano structure is fixed, and forms the concaveconvex structure of micro- picture and text, i.e., micro- picture and text
Be it is concave, background be protrusion.
(5) attachment is printed using the silicone oil of aluminum-spraying machine, using the soft version of full version as galley, evaporates speed in silicone oil appropriate
Degree makes it form one layer of very thin silicon layer (i.e. volatile layer) on soft version surface.In the present embodiment, the comprehensive overlay structure of silicon layer
The concaveconvex structure of layer, and coating thickness is more than the difference in height of concaveconvex structure sunk area and elevated regions, so that total layer
Volatile layer upper level on surface is consistent.To guarantee that the silicon layer thickness of sunk area is greater than the silicon layer of elevated regions
Highly, so that the silicon layer of elevated regions, which can first volatilize, to be finished when volatilization.
(6) by vacuum aluminum-coated, in micro- image-text area deposited aluminum layer of not silicone oil, and there is the background area of silicone oil cannot
Deposited aluminum layer shows the micro- picture and text effect aluminized.Simultaneously under conditions of vacuum, silicone oil constantly volatilizees, the thickness of silicon layer
Constantly reduce, even without.
(7) under the conditions of 180 DEG C, the hot-fusible pressure-sensitive adhesive of blue is coated on aluminium layer, and compound with release paper；Then through mould
It cuts, slitting, wide inspection identify to get to the safe-guarding and anti-counterfeiting of macroscopic dynamic graphics and text effect.
Further, in this embodiment graphic anti-counterfeiting membrane-film preparation process in, micro-lens arrays layer can be prior to micro- figure
Literary layer preparation, can also first prepare micro- picture and text layer and prepare micro-lens arrays layer again.First to prepare microlens array in the present embodiment
Layer is illustrated the preparation process of graphic anti-counterfeiting film, does not make in technical solution of the present invention to the preparation sequence of the two specific
Restriction.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of preparation method of the graphic anti-counterfeiting structure based on microlens array, which is characterized in that including,
UV curing materials or thermoplastic resin dope are uniformly coated on substrate layer side by S1, on the coating layer by UV coining or
The mode of hot padding imprints out concaveconvex structure that is equally distributed, including graph text information, forms structure sheaf；
S2 is equably coated with one layer of volatile layer on the crowning of concaveconvex structure, and volatile layer, the volatilization are not coated on concave face
Layer is coated with by volatile materials to be formed, and has volatility；
S3 has metal layer without the area deposition of silicone oil, is coated with silicon in the upper deposited metal layer of structure sheaf concaveconvex structure
The region not deposited metal layer of oil, to obtain the engraved structure of concave face deposited metal layer, crowning not deposited metal layer；
S4 full version printing ink layer on the basis of metal layer assigns the structure sheaf of no metal layer covering with color, thus
Substrate layer side is observed that structure sheaf, metal layer and ink layer are collectively formed that tool is coloured, sharp-edged picture and text letter
Cease structure；
S5 prepares gum layer on ink layer, obtains graphic anti-counterfeiting structure.
2. the preparation method of a kind of graphic anti-counterfeiting structure based on microlens array according to claim 1, wherein also wrapping
It includes, second coating is obtained in the other side even spread UV curing materials of substrate layer, by nano impression in the second coating
The concaveconvex structure of upper formation microlens array, the microlens array and structure sheaf matches, so that the concaveconvex structure
More beautiful effect is showed, antifalsification is enhanced.
3. a kind of preparation method of the graphic anti-counterfeiting structure based on microlens array, which is characterized in that including,
UV curing materials or thermoplastic resin dope are uniformly coated on substrate layer side by S1 ', are imprinted on the coating layer by UV
Or the mode of hot padding, imprint out include graph text information concaveconvex structure, formed structure sheaf；
S2 ' is equably coated with one layer of volatile paint to sustained height in the upper of concaveconvex structure, and formation recess face thickness is big, protrusion
The small volatile layer of face thickness；
S3 ' deposited metal layer on structure sheaf concaveconvex structure, volatile layer volatilization is complete on crowning and is formed certain thickness
Volatile layer is not yet evaporated completely full-time stopping deposition on aluminium layer, concave face, obtains crowning deposited metal layer, concave face does not deposit gold
Belong to the engraved structure of layer；
S4 ' full version printing ink layer on the basis of metal layer assigns the structure sheaf of no metal layer covering with color, thus
Substrate layer side is observed that structure sheaf, metal layer and ink layer are collectively formed that tool is coloured, sharp-edged picture and text letter
Cease structure；
Gum layer is coated on ink layer by S5 ', obtains graphic anti-counterfeiting structure.
4. the preparation method of a kind of graphic anti-counterfeiting structure based on microlens array according to claim 3, wherein also wrapping
It includes, second coating is obtained in the other side even spread UV curing materials of substrate layer, by nano impression in the second coating
The concaveconvex structure of upper formation microlens array, the microlens array and structure sheaf matches, so that the concaveconvex structure
More beautiful effect is showed, antifalsification is enhanced.
5. the graphic anti-counterfeiting structure that any one preparation method prepares according to claim 1~4, including stack gradually and set
Substrate layer, micro- picture and text layer and the gum layer set, wherein the substrate layer as outermost protective layer, the glue-line be used for
The fitting of marker surface, which is characterized in that
Micro- picture and text layer includes the structure sheaf, metal layer and ink layer stacked gradually, the structure sheaf side close to substrate layer,
The other side is provided with the concaveconvex structure containing graph text information, has aluminium layer on the concave face of the concaveconvex structure, ink layer close to
The crowning of concaveconvex structure is arranged, and fits with the aluminium layer of concave face；Or
Micro- picture and text layer includes the structure sheaf, metal layer and ink layer stacked gradually, the structure sheaf side close to substrate layer,
The other side is provided with the concaveconvex structure containing graph text information, has aluminium layer on the crowning of the concaveconvex structure, ink layer close to
The concave face of concaveconvex structure is arranged, and fits with the aluminium layer of concave face；
By this method, the aluminium layer and ink layer are compared the picture and text structure for highlighting structure sheaf, are formed in concaveconvex structure
The hollow out effect of local aluminizing, can be improved the antifalse effect of graph text information.
6. a kind of graphic anti-counterfeiting structure based on microlens array according to claim 5, wherein the graphic anti-counterfeiting knot
Structure further includes micro-lens arrays layer, is separately positioned on substrate layer two sides with micro- picture and text layer；The micro-lens arrays layer includes more
A micro lens arranged in the form of an array.
7. a kind of graphic anti-counterfeiting structure based on microlens array according to claim 5 or 6, wherein the concave-convex knot
The upper and lower surfaces difference in height of structure is 0.3-5 microns.
8. according to a kind of described in any item graphic anti-counterfeiting structures based on microlens array of claim 5~7, wherein described
The focal length of the micro lens of multiple array arrangements is preferably equal.
9. according to a kind of described in any item graphic anti-counterfeiting structures based on microlens array of claim 5~8, wherein described
The arrangement period of microlens array preferably matches with micro- picture and text of structure sheaf.
10. according to a kind of described in any item graphic anti-counterfeiting structures based on microlens array of claim 5~9, wherein described
The thickness of base membrane layer and the focal length of micro lens match, and the concaveconvex structure is preferably located exactly in the focus of micro lens.
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