WO2020239138A1 - 一种安全图案的制备系统 - Google Patents

一种安全图案的制备系统 Download PDF

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Publication number
WO2020239138A1
WO2020239138A1 PCT/CN2020/099929 CN2020099929W WO2020239138A1 WO 2020239138 A1 WO2020239138 A1 WO 2020239138A1 CN 2020099929 W CN2020099929 W CN 2020099929W WO 2020239138 A1 WO2020239138 A1 WO 2020239138A1
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Prior art keywords
magnetic field
printing substrate
field
light source
pattern
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PCT/CN2020/099929
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English (en)
French (fr)
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甄欣
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甄欣
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Publication of WO2020239138A1 publication Critical patent/WO2020239138A1/zh

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/20—Exposure; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/26—Processing photosensitive materials; Apparatus therefor
    • G03F7/40—Treatment after imagewise removal, e.g. baking

Definitions

  • the invention belongs to the technical field of anti-counterfeiting printing, and in particular relates to a security pattern applied in the field of anti-counterfeiting and a preparation system thereof.
  • VIAVI magneto-optical variable anti-counterfeiting pattern jointly developed by VIAVI and Sicpa.
  • VIAVI has registered a large number of patents for the application technology of magnetic optically variable ink. The most important one is 200480018382.5, which was applied in 2004.
  • the method and device for generating patterns in layers This technology has been used in the anti-counterfeiting of banknotes in many countries around the world; it is worth mentioning that the core technical elements of VIAVI and Sicpa to form security printing patterns are printed patterns and magnetic plate patterns.
  • the purpose of the present invention is to provide a more complex and anti-counterfeit paper currency printing solution and equipment.
  • a security pattern preparation system which is characterized in that it comprises: a printing substrate with an inducible ink coating printed on the surface and at least one imaging magneto-optical device for forming a variable security pattern on the surface of the printing substrate Dual fields and a set of curing optical and magnetic dual fields; the printing substrate is conveyed and sequentially passes through the at least one imaging optical and magnetic dual fields and the curing optical and magnetic dual fields; the imaging optical and magnetic dual fields include optical fields And a magnetic field, the light field and the magnetic field are respectively arranged above and below the printing substrate, and the magnetic field is used to induce the inducible ink coating of the printing substrate to form a magnetic field pattern.
  • the field adopts transparent film as the pattern carrier for curing the part of the ink coating that is induced by the magnetic field corresponding to the pattern;
  • the curing optical-magnetic dual field includes a curing light source and a curing magnetic field, the curing light source and the The curing magnetic field is respectively arranged above and below the printing substrate, or one pole of the curing magnetic field is arranged above the printing substrate, and the other pole of the curing magnetic field is arranged below the printing substrate,
  • the curing magnetic field can induce again the portion of the ink coating that is not irradiated by the light field, and the curing light source is used to cure the ink coating that is induced again.
  • the light transmittance of the transparent film is 70-100%.
  • one pole of the fixed magnetic field and the other pole of the fixed magnetic field are symmetrically arranged and both are perpendicular to the surface of the printing substrate, or both are inclined to the surface of the printing substrate.
  • the parallel light source includes a light source and a parallel light lens, the parallel light source is a UV light source or an EB electron beam, and the corresponding inducible ink is a UV curing ink or an electron beam curing ink.
  • the magnetic field and/or the second magnetic field is a permanent magnetic field, an electromagnetic field or a caterpillar magnetic field;
  • the shape of the permanent magnetic field or the electromagnetic field is a cylindrical shape, a horseshoe shape, a plane shape, a uniform magnetic field, a motor-driven spherical cap type magnetic field or a vertical Direction superimposed magnetic field
  • the crawler-type magnetic crawler is a rubber-magnetic crawler or a crawler with a magnetic plate clamped.
  • the security pattern includes a two-dimensional code and a variable code
  • the magnetic field is a fixed planar magnetic field
  • the fixed planar magnetic field has the same magnetic field distribution in a section of the moving direction
  • the magnetic field is used to The inducible ink coating of the printing substrate is induced, and the pigment flakes in the corresponding ink coating are arranged on a plane.
  • the light field is used to transfer the ink coating induced by the magnetic field by the light field.
  • the irradiated part is cured.
  • the light field is a variable light field, and includes a parallel light source and a variable light barrier.
  • the light from the parallel light source is projected onto the surface of the printing substrate through the variable light barrier, and the parallel light
  • the light source, the parallel light lens and the variable diaphragm are arranged in order from top to bottom.
  • the variable diaphragm includes a transparent film, a film transmission system, a fixed inkjet system and an inkjet drying unit.
  • the film transmission system connects the The transparent film drives synchronously with the printing substrate.
  • the inkjet system and the inkjet drying unit can continuously output a variable diaphragm pattern to the surface of the moving transparent film.
  • the transparent film with the diaphragm pattern is then projected on the surface of the printing substrate, so that the diaphragm pattern is transferred to the ink coating on the surface of the printing substrate.
  • the light field includes a parallel light source and a fixed diaphragm
  • the fixed diaphragm includes a transparent film with a continuous prefabricated pattern and a fixed light-shielding body that is cyclically driven at the same linear speed as the printing substrate, so
  • the light-shielding body is provided with a light-transmitting slit
  • the transparent film moves past the light-shielding body
  • the parallel light source is arranged above the light-shielding body
  • the parallel light source sequentially passes through the transparent film and the light-transmitting slit and then projects on
  • the part of the prefabricated pattern exposed on the transparent slit on the transparent film is transferred to the ink coating on the surface of the printing substrate.
  • the light field adopts a fixed diaphragm
  • the fixed diaphragm includes a transparent film prefabricated with a continuous pattern and a parallel light source
  • the transparent film is conveyed at the same linear speed as the printing substrate, and the transparent
  • the film is transferred between the parallel light source and the printing substrate, the light emitted from the parallel light source is projected on the ink coating on the surface of the printing substrate through the transparent film, thereby transferring the pattern Into the ink coating.
  • the light field is a pulsed diaphragm
  • the pulsed diaphragm includes a parallel light source and a pre-patterned pulsed transmission transparent film
  • the parallel light source is arranged above the transparent film
  • the transparent film For each pulse transmission, one or a group of patterns on it are located between the parallel light source and the printing substrate, and the light emitted from the parallel light source is projected on all the patterns through the transparent film On the ink coating on the surface of the printing substrate, the pattern is transferred to the ink coating.
  • the two poles of the magnetic field and the solidification magnetic field have opposite vertical directions.
  • the principle of the present invention is: the parallel light source and the transparent film form a parallel light pattern with pattern information, the parallel light pattern is mapped on the inducible ink coating of the printing substrate, and the part of the ink coating corresponding to the parallel light pattern is
  • the photoinitiator in the liquid UV material in the inducible ink coating of the pre-cured part is stimulated to become free radicals or cations, thereby initiating the polymer resin containing active functional groups to polymerize into a solid state, which cannot be externally again Magnetic field induction
  • the printed substrate passes through the second set of imaging light field dual fields, the uncured pigments in the ink coating are arranged according to the field distribution of the second induced magnetic field, and then the second set of imaging light field dual fields
  • the light field is pre-cured. At this time, you can choose to enter the third set of imaging light field dual fields...Finally, the multiple pre-exposed patterns are cured.
  • the present invention has the following advantages:
  • the imaging light field adopts transparent film, the film thickness is very small, the light transmission is good, so that the border of the pattern is clearer, and the film is flexible and bendable, so it can be synchronized with the printing substrate to adjust the distance between it and the printing substrate distance.
  • each security pattern formed has a controllable difference, thus completing the machine-readable one-object one-code or machine-readable invisible pattern required for anti-counterfeiting traceability.
  • the security pattern formed by the present invention has higher security, anti-counterfeiting and stronger traceability function.
  • the anti-counterfeiting pattern formed by the present invention is more complicated in complexity and contains more information; in practical applications, it can also increase the number of multiple sets of controllable exposure patterns and magnetic field patterns to form more complex anti-counterfeiting patterns, which are more difficult to replicate. purpose.
  • FIG. 1 is a schematic structural diagram of a system according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic diagram of the structure of the light field according to the second embodiment of the present invention.
  • FIG. 3 is a schematic diagram of the structure of the system of Embodiment 3 of the present invention.
  • FIG. 4 is a schematic diagram of the structure of the cured photo-magnetic dual field in the fifth embodiment of the invention.
  • FIG. 5 is a schematic diagram of the structure of the planar fixed magnetic field according to the sixth embodiment of the present invention.
  • This embodiment provides a system for forming a variable security pattern with a photo-magnetic dual field, as shown in FIG. 1, which includes: a printing substrate 1 on which an inducible ink coating is printed on the surface; 1 The imaging photo-magnetic dual field and curing photo-magnetic dual field with variable security patterns formed on the surface.
  • the printing substrate 1 is conveyed by a conveying mechanism, and sequentially passes through the imaging photo-magnetic dual field and the curing photo-magnetic dual field;
  • the imaging photo-magnetic dual field includes an optical field and a magnetic field, and the optical field and the magnetic field are set separately Above and below the printing substrate 1;
  • the magnetic field 2 is a synchronous magnetic field, which realizes synchronous movement with the printing substrate 1 through the transmission of the magnetic field transmission mechanism, that is, moves at the same linear speed for
  • the inducible ink coating printed on the surface of the printing substrate 1 is induced to form a magnetic field pattern, and the light field is used to cure the portion of the ink coating induced by the magnetic field that is irradiated by the light field;
  • the curing photo-magnetic dual field includes a curing light source 8 and a curing magnetic field 9.
  • the curing light source 8 and the curing magnetic field 9 are respectively arranged above and below the printing substrate 1, so that the curing magnetic field 9 can affect the ink
  • the part of the coating that is not irradiated by the light field is induced again, and the curing light source 8 is used for final curing of the ink coating of the entire pattern part.
  • the curing light source 8 is vertically projected on the ink coating of the printing substrate 1 from above the printing substrate 1.
  • the magnetic field 2 and/or the solidified magnetic field 9 is a permanent magnetic field, an electromagnetic field or a caterpillar magnetic field; the shape of the permanent magnetic field or the electromagnetic field is cylindrical, horseshoe-shaped, uniform magnetic field, motor-driven spherical cap type magnetic field or vertical direction. A magnetic field is superimposed, and the track of the track-type magnetic field is a rubber-magnetic track or a track with a magnetic plate clamped.
  • the light field is a variable light field, which is composed of a parallel light source 3 and a variable light barrier.
  • the parallel light source 3 includes a light source and a parallel light lens.
  • the light source adopts a UV light source or an EB electron beam, and the corresponding inducible ink adopts UV curing ink or electron beam curing ink.
  • the light from the parallel light source 3 is projected onto the surface of the printing substrate 1 through the variable diaphragm.
  • the variable diaphragm is formed by a transparent film 4, a film transmission system 5, and a fixed inkjet system 6 and an inkjet drying unit 7.
  • the film transmission system 5 connects the transparent film 4 with the printing substrate 1 Driven at the same linear speed, the inkjet system 6 and the inkjet drying unit 7 work continuously, and continuously output a variable aperture pattern to the surface of the transparent film 4 that is driven, and the light emitted by the parallel light source 3 is transmitted through The transparent film 4 with the diaphragm pattern is then projected on the surface of the printing substrate 1 so that the diaphragm pattern is transferred to the ink coating on the surface of the printing substrate 1.
  • the inducible ink pattern is again designed to form a second optical-magnetic dual-field with the same principle as the above-mentioned optical-magnetic dual-field, and then partially exposed; theoretically, it can enter the imaging optical-magnetic dual-field multiple times.
  • Multiple partial exposures taking into account the complexity of the process, generally choose one partial exposure or two partial exposures to achieve complex patterns.
  • the inducible ink pattern is sequentially transferred out of the last set of imaging photo-magnetic dual fields.
  • the exposed part has been cured, but the uncured part and the cured part have the same pigment arrangement. Therefore, another magnetic field must be used to change the arrangement of the uncured part of the pigment. Therefore, a curing magnetic field is used to induce the uncured part of the pigment flakes again, and then enter the irradiation area of the curing light field to finally cure.
  • variable diaphragm film preparation method includes the following methods:
  • Thermal and thermal transfer technology for preparing variable diaphragm film The film needs to choose a high-temperature color-developing thermal film. This film will not change at room temperature, but as the temperature increases, the film layer will undergo chemical The color of the reaction changes from transparent to black. This reaction occurs at a high temperature above 200°C, and the reaction is completed in only tens of microseconds.
  • the basic principle of thermal transfer technology is similar to that of thermal technology: it consists of thermal transfer ribbon and transparent substrate film. The thermal head contacts the thermal transfer ribbon and the transparent substrate film in sequence, The coloring material is transferred and melted on the transparent substrate film to form a pattern;
  • Inkjet printing technology for preparing variable diaphragm film using piezoelectric inkjet technology, the nozzle prints a variable pattern on the transparent film online;
  • Stylus printing and laser printing to prepare variable diaphragm film technology use existing stylus printers and laser printers to print variable patterns on the transparent film online.
  • This embodiment is similar to the first embodiment. The only difference is that the light field in the imaging photo-magnetic dual field is different. As shown in FIG. 2, the light field is a fixed light barrier, which is made of a transparent film 40 prefabricated with a continuous pattern. And a parallel light source 30, the transparent film 40 is conveyed at the same linear speed as the printing substrate, when the transparent film 40 is conveyed between the parallel light source 30 and the printing substrate, the The light emitted from the parallel light source 30 is projected onto the ink coating on the surface of the printing substrate through the transparent film 40, thereby transferring the pattern to the ink coating.
  • the light field in the imaging photo-magnetic dual field is different.
  • the light field is a fixed light barrier, which is made of a transparent film 40 prefabricated with a continuous pattern.
  • a parallel light source 30 the transparent film 40 is conveyed at the same linear speed as the printing substrate, when the transparent film 40 is conveyed between the parallel light source 30 and the printing substrate, the The light emitted from the parallel
  • the transparent film 40 can be continuously recycled after being prepared into a closed loop.
  • the pigment flakes in the ink pattern are oriented and arranged under the induction of the magnetic field; because the printing substrate of the inducible ink pattern and the synchronous magnetic field are relatively static, the inducible ink
  • the printed substrate of the pattern and the synchronous magnetic field enter the lower area of the light field synchronously; at this time, the transparent film 40 is also synchronously driven and continuously outputs the pre-prepared diaphragm pattern; after the parallel light source 30 passes through the diaphragm pattern, the pattern of the diaphragm
  • the inducible ink pattern is exposed and cured, and after the light barrier pattern is exposed, the inducible ink pattern is sequentially transmitted out of the light field and the synchronous magnetic field.
  • the light field in the imaging optical-magnetic dual field is different.
  • the light field is composed of a parallel light source 300 and a fixed diaphragm. It is formed by a transparent film 400 with a continuous pre-pattern and a fixed light-shielding body 500 that is cyclically driven at the same linear speed as the printing substrate.
  • the light-shielding body 500 is provided with a light-transmitting slit 510, and the transparent film 400 moves After passing through the shading body 500, the parallel light source 300 is arranged above the shading body 500, and is projected on the ink coating of the printing substrate through the transparent film 500 and the light-transmitting slit 510 in sequence.
  • the part of the prefabricated pattern on the transparent film 400 exposed by the light-transmitting slit of the shading body is transferred to the ink coating on the surface of the printing substrate.
  • This embodiment is similar to the second embodiment. The only difference is that the light field in the imaging photomagnetic dual field is different.
  • the light field adopts a pulsed projection diaphragm, which includes a parallel light source and a pre-patterned pulsed transmission transparent film.
  • the parallel light source is arranged above the transparent film, and each pulse transmission of the transparent film causes one or a group of patterns on it to be located between the parallel light source and the printing substrate.
  • the light emitted from the light source is projected onto the ink coating on the surface of the printing substrate through the pattern of the transparent film, thereby transferring the pattern to the ink coating.
  • This embodiment is similar to any one of Embodiments 1 to 4, except that the setting of the curing magnetic field is different. Specifically, as shown in FIG. 4, one pole of the curing magnetic field 90 is set above the printing substrate 100, and the other pole is set at Below the printing substrate 100. Moreover, one pole and the other pole of the curing magnetic field 90 are arranged symmetrically, and both are perpendicular to the surface of the printing substrate 100, or inclined with respect to the surface of the printing substrate, so that the connection between the two poles and the printing substrate The material is not vertical, but presents an angle, and the angle can be controlled well to form the effect of invisible side coding.
  • 80 is a curing light source.
  • Embodiment 6 is a diagrammatic representation of Embodiment 6
  • the security pattern prepared by the system of this embodiment is a two-dimensional code or a variable code
  • the magnetic field of the imaging photo-magnetic dual field is a fixed planar magnetic field as shown in FIG.
  • the induced ink coating is induced, the pigment flakes in the corresponding ink coating are arranged on a plane, and the light field is used to cure the portion of the ink coating that is induced by the magnetic field and irradiated by the light field .
  • the imaging photo-magnetic dual field adopts the description of this embodiment, and the magnetic field of the curing photo-magnetic dual field can be selected in one of the two methods of embodiment 1 and embodiment 5. .
  • the magnetic fields of the curing magnetic field and the imaging photomagnetic dual field of the other embodiments are all set under the printing substrate, and the N ⁇ S poles of the two magnetic fields should be set up and down oppositely.

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Abstract

本发明提供一种安全图案的制备系统，其包括：表面印刷有可诱导的油墨涂层的印刷基材及用于在所述印刷基材表面形成可变安全图案的至少一套成像光磁双场和一套固化光磁双场；所述印刷基材被传送，依次经过所述光磁双场和固化光磁双场；成像光磁双场系统包括光场和磁场，光场和磁场分别设置于所述印刷基材上方和下方，磁场用于对所述印刷基材的可诱导的油墨涂层进行诱导，形成磁场图案，光场采用透明菲林为图案载体，用于将经过磁场诱导的油墨涂层的与图案对应的部分固化；固化光磁双场包括固化光源和固化磁场，固化磁场可对油墨涂层的未被光场照射的部分进行再次诱导，固化光源用于对再次诱导的油墨涂层进行固化。本发明制备的图案防伪度更高。

Description

一种安全图案的制备系统 技术领域
本发明属于防伪印刷技术领域，尤其涉及一种应用于防伪领域的安全图案及其制备系统。
背景技术
VIAVI公司和Sicpa公司共同开发的磁性光变防伪图案，VIAVI公司对于磁性光变油墨的应用技术注册了大量的专利，最为核心的是2004年申请的200480018382.5《通过磁场作用诱导在含有磁性颗粒的涂层中产生图案的方法和装置》，该技术在全球范围内多国钞票防伪上已经应该；值得一提的是VIAVI公司和Sicpa公司形成安全印刷图案的核心技术元素是印刷图案和磁版图案。
发明内容
本发明的目的是提供一种更加复杂、防伪程度更高的纸币印刷方案和设备。
本发明的目的是通过以下技术方案实现的：
一种安全图案的制备系统，其特征在于，其包括：表面印刷有可诱导的油墨涂层的印刷基材及用于在所述印刷基材表面形成可变安全图案的至少一套成像光磁双场和一套固化光磁双场；所述印刷基材被传送且依次经过所述至少一套成像光磁双场和所述固化光磁双场； 所述成像光磁双场包括光场和磁场，所述光场和磁场分别设置于所述印刷基材的上方和下方，所述磁场用于对所述印刷基材的可诱导的油墨涂层进行诱导，形成磁场图案，所述光场采用透明菲林为图案载体，用于将经过所述磁场诱导的油墨涂层的与所述图案对应的部分固化；所述固化光磁双场包括固化光源和固化磁场，所述固化光源和所述固化磁场分别设置于所述印刷基材的上方和下方，或者，所述固化磁场的一极设置于所述印刷基材上方，固化磁场的另一极设置于所述印刷基材的下方，使得所述固化磁场可对所述油墨涂层的未被所述光场照射的部分进行再次诱导，所述固化光源用于对再次诱导的所述油墨涂层进行固化。
作为优选，所述透明菲林的透光率为70-100％。
作为优选，所述固定磁场的一极和所述固定磁场的另一极对称设置且二者与所述印刷基材表面相垂直，或者二者与所述印刷基材表面倾斜。作为优选，所述平行光源包括光源和平行光镜头，所述平行光源为UV光源或EB电子束，对应的可诱导油墨为UV固化油墨或电子束固化油墨。
作为优选，所述磁场和/或第二磁场为永磁场、电磁场或履带式磁场；所述永磁场或电磁场的形状是柱形、马蹄形、平面形、均匀磁场、电机驱动球冠型磁场或垂直方向的叠加磁场，所述履带式磁场的履带为橡胶磁式的履带或者装夹磁板的履带。
可选的，所述安全图案包括二维码和可变码，所述磁场为固定平面磁场，所述固定平面磁场在移动方向的一段区域内磁场的分布相同； 所述磁场用于对所述印刷基材的可诱导的油墨涂层进行诱导，对应的油墨涂层内的颜料片排列在一个平面上，所述光场用于将经过所述磁场诱导的油墨涂层的被所述光场照射的部分进行固化。
可选的，所述光场为可变光场，包括平行光源及可变光栏，所述平行光源的光经过所述可变光栏投射于所述印刷基材的表面上，所述平行光源、平行光镜头及可变光栏自上而下依次设置，所述可变光栏包括透明菲林、菲林传动系统、固定的喷墨系统和喷墨干燥单元，所述菲林传动系统将所述透明菲林与所述印刷基材同步传动，所述喷墨系统和所述喷墨干燥单元能够连续向移动的透明菲林的表面输出可变的光栏图案，所述平行光源的出射光透过已有所述光栏图案的所述透明菲林后投射于所述印刷基材的表面，使得所述光栏图案被转移到印刷基材的表面的油墨涂层中。
可选的，所述光场包括平行光源和固定光栏，所述固定光栏包括与所述印刷基材同样的线速度循环传动的具有连续的预制图案的透明菲林和固定的遮光体，所述遮光体上设有透光缝，所述透明菲林移动经过所述遮光体，所述平行光源设置于所述遮光体的上方，平行光源依次透过所述透明菲林和透光缝后投射于所述印刷基材的所述油墨涂层上，并将透明菲林上的裸露在透光缝上的预制图案部分转移到印刷基材表面的油墨涂层中。
可选的，所述光场采用固定光栏，所述固定光栏包括预制有连续图案的透明菲林及平行光源，所述透明菲林与所述印刷基材相同的线速度被传送，所述透明菲林被传送至所述平行光源和所述印刷基材之 间时，所述平行光源的出射光经所述透明菲林投射于所述印刷基材表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
可选的，所述光场为脉冲式光栏，所述脉冲式光栏包括平行光源和预制有图案的脉冲式传动透明菲林，所述平行光源设置于所述透明菲林上方，所述透明菲林的每一次脉冲传动，均使得其上的一个或一组图案位于所述平行光源和所述印刷基材之间，所述平行光源的出射光经所述透明菲林的所述图案投射于所述印刷基材表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
特别需要指出，当所述磁场和所述固化磁场均设置于所述印刷基材下方时，所述磁场和所述固化磁场二者的两极上下方向相反。
本发明的原理为：平行光源和透明菲林形成带有图案信息的平行光图案，平行光图案映射于印刷基材的可诱导的油墨涂层上，油墨涂层的与平行光图案对应的部分被预固化处理，被预固化部分的可诱导的油墨涂层中液态UV材料中的光引发剂受到刺激变为自由基或阳离子，从而引发含活性官能团的高分子树脂聚合成固态，无法再次被外部磁场诱导；印刷基材再经过第二套成像光场双场，油墨涂层内的未被预固化的颜料按照第二诱导磁场的场分布定向排列，然后再被第二套成像光场双场的光场预固化，此时可以选择进入第三套成像光场双场...最终，对多次预曝光的图案进行固化处理。
使用EB电子束油墨的原理相同，也是图案的部分被电子束曝光后，被爆光部分内的高能电子与油墨涂料分子相互作用，使之分解成自由基，然后自由基与C＝C双键反应，形成增长链；最后，增长链与 涂料油墨的其余组分反应，使固化涂层产生交联，交联密度增加。
相对于现有技术，本发明具有以下优点：
1、成像光场采用透明菲林，菲林厚度极小，透光性好，使得图案的边界更加清晰，且菲林为柔性可弯曲，因此可随印刷基材同步传动，调整其与印刷基材之间的距离。
2、由于用于曝光的光图案可控制，因此形成的每个安全图案都有可控的差异，从而完成防伪溯源要求的可机读式一物一码或可机读式隐形图案。
3、本发明形成的安全图案安全性、防伪性更高，可溯源功能更强。本发明形成防伪图案在复杂程度上更加复杂，包含信息更加丰富；在实际的应用中还可以增加多组可控曝光图案和磁场图案的数量，形成更为复杂的防伪图案，达到更加难以复制的目的。
附图说明
图1为本发明实施例一的系统的结构示意图；
图2为本发明实施例二的光场的结构示意图；
图3是本发明实施例三的系统的结构示意图；
图4为本发明实施例五的固化光磁双场的结构示意图；
图5为本发明实施例六的平面固定磁场的结构示意图。
具体实施方式
实施例一：
本实施例提供一种光磁双场形成可变安全图案的系统，如图1所示，其包括：表面印刷有可诱导的油墨涂层的印刷基材1及用于在所述印刷基材1表面形成可变安全图案的成像光磁双场和固化光磁双场。
所述印刷基材1被传送机构传送，依次经过所述成像光磁双场和所述固化光磁双场；所述成像光磁双场包括光场和磁场，所述光场和磁场分别设置于所述印刷基材1的上方和下方；所述磁场2为同步磁场，其通过磁场传送机构的传送与所述印刷基材1实现同步移动，即以同样的线速度移动，用于对所述印刷基材1表面印刷的可诱导的油墨涂层进行诱导，形成磁场图案，所述光场用于将经过所述磁场诱导的油墨涂层的被所述光场照射的部分固化；所述固化光磁双场包括固化光源8和固化磁场9，所述固化光源8和所述固化磁场9分别设置于所述印刷基材1的上方和下方，使得所述固化磁场9可对所述油墨涂层中的未被所述光场照射的部分进行再次诱导，所述固化光源8用于对整个图案部分的油墨涂层进行最后固化。所述固化光源8由印刷基材1上方垂直投射于印刷基材1的油墨涂层上。
具体的，所述磁场2和/或固化磁场9为永磁场、电磁场或履带式磁场；所述永磁场或电磁场的形状是柱形、马蹄形、均匀磁场、电机驱动球冠型磁场或垂直方向的叠加磁场，所述履带式磁场的履带为橡胶磁式的履带或者装夹磁板的履带。
所述光场为可变光场，由平行光源3及可变光栏构成，所述平行光源3包括光源和平行光镜头，所述光源采用UV光源或EB电子束， 对应的可诱导油墨采用UV固化油墨或电子束固化油墨。所述平行光源3的光经过所述可变光栏投射于所述印刷基材1表面。所述可变光栏由透明菲林4、菲林传动系统5、以及固定的喷墨系统6和喷墨干燥单元7形成，所述菲林传动系统5将所述透明菲林4与所述印刷基材1以相同的线速度传动，所述喷墨系统6和所述喷墨干燥单元7连续工作，连续向传动的透明菲林4表面输出可变的光栏图案，所述平行光源3的出射光透过已有所述光栏图案的所述透明菲林4后投射于所述印刷基材1表面，使得所述光栏图案被转移到印刷基材1表面的油墨涂层中。
此时，根据设计可以有多个选择：
经过一次部分曝光的可诱导的油墨图案再次经过设计好的与上述光磁双场原理相同的第二组成像光磁双场，再次被部分曝光；理论上可以多次进入成像光磁双场被多次部分曝光；考虑到工艺的复杂程度，一般选择一次部分曝光或两次部分曝光就可以达到复杂的图案。
经过最终磁场和光固化，可诱导的油墨图案依次被传送出最后一组成像光磁双场后，被曝光的部分已经固化，但是未被固化的部分和已固化的部分的颜料排列是相同的，所以必须再次用另外一个磁场改变未被固化部分的颜料排列，因此采用固化磁场对未被固化的部分的颜料片再次诱导，然后进入固化光场的照射区域最终固化。
事实上，上述的可变光栏菲林的制备方法包括以下几种方式：
1、热敏和热转印制备可变光栏菲林技术：菲林需要选择高温显色热敏薄膜菲林，此薄膜菲林在常温下不会发生任何变化，而随温度 升高，薄膜层会发生化学反应，颜色由透明变成黑色，在200℃以上高温发生这种反应，反应仅在几十微秒中完成。热转印技术的基本原理与热敏技术近似：由热转印色带和透明基材菲林组成，热敏头依次接触热转印色带和透明基材菲林，将热转印色带上的着色材料转移熔化在透明基材菲林上，形成图案；
2、喷墨印制备可变光栏菲林技术：使用压电喷墨技术，喷嘴在透明菲林上在线喷印出可变图案；
3、针式打印和激光打印制备可变光栏菲林技术：使用现有的针式打印机和激光打印机在透明菲林上在线打印出可变图案。
实施例二：
本实施例和实施例一相似，区别仅在于，成像光磁双场中的光场不同，具体如图2所示，所述光场为固定光栏，其由预制有连续图案的透明菲林40及平行光源30构成，所述透明菲林40以与所述印刷基材相同的线速度被传送，所述透明菲林40被传送至所述平行光源30和所述印刷基材之间时，所述平行光源30的出射光经所述透明菲林40投射于所述印刷基材表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
所述透明菲林40可以制备成闭环后连续循环使用。
印刷基材传送进入同步磁场可以诱导的区域后，油墨图案内的颜料片在磁场的诱导下发生定向排列；由于可诱导的油墨图案的印刷基材和同步磁场是相对静止的，可诱导的油墨图案的印刷基材和同步磁场同步进入到光场的下方区域；此时透明菲林40也是同步传动，连 续输出预制备好的光栏图案；平行光源30经过光栏图案后，将光栏的图案在可诱导的油墨图案进行曝光固化，经过光栏图案曝光后，可诱导的油墨图案依次被传送出光场和同步磁场。
实施例三：
本实施例和实施例二相似，区别仅在于，成像光磁双场中的光场不同，具体如图3所示，所述光场由平行光源300和固定光栏构成，所述固定光栏由与所述印刷基材同样的线速度循环传动的具有连续的预制图案的透明菲林400和固定的遮光体500形成，所述遮光体500上设有透光缝510，所述透明菲林400移动经过所述遮光体500，所述平行光源300设置于所述遮光体500上方，依次透过所述透明菲林500和透光缝510投射于所述印刷基材的所述油墨涂层上，将由所述遮光体的透光缝裸露的透明菲林400上的预制图案部分转移到印刷基材表面的油墨涂层中。
实施例四：
本实施例和实施例二相似，区别仅在于，成像光磁双场中的光场不同，所述光场采用脉冲式投射光栏，其包括平行光源和预制有图案的脉冲式传动透明菲林，所述平行光源设置于所述透明菲林上方，所述透明菲林的每一次脉冲传动，均使得其上的一个或一组图案位于所述平行光源和所述印刷基材之间，所述平行光源的出射光经所述透明菲林的所述图案投射于所述印刷基材表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
实施例五：
本实施例和实施例一至四任一相似，区别仅在于，固化磁场的设置不同，具体如图4所示，固化磁场90的一极设置于所述印刷基材100上方，另一极设置于所述印刷基材100下方。而且，所述固化磁场90的一极和另一极对称设置，且二者相对于所述印刷基材100表面垂直，或者相对于所述印刷基材表面倾斜，使得两极的连线与印刷基材非垂直，而是呈一夹角，夹角控制好可以形成侧面可编码隐形的效果。图4中，80为固化光源。
实施例六：
本实施例之系统用于制备的安全图案为二维码或可变码，所述成像光磁双场的磁场为如图5所示的固定平面磁场，用于对所述印刷基材的可诱导的油墨涂层进行诱导，对应的油墨涂层内的颜料片排列在一个平面上，所述光场用于将经过所述磁场诱导的油墨涂层的被所述光场照射的部分进行固化。
由于二维码和可变码需要油墨涂层的表面足够平整，成像光磁双场采用本实施例所述，固化光磁双场的磁场可以选用实施例一和实施例五两种方式之一。
需要说明的是，除实施例五外，其余实施例的固化磁场和成像光磁双场的磁场均设置于印刷基材下方，则两种磁场的N\S两极要上下相反设置。

Claims (12)

  1. 一种安全图案的制备系统，其特征在于，其包括：表面印刷有可诱导的油墨涂层的印刷基材(1)及用于在所述印刷基材(1)表面形成可变安全图案的至少一套成像光磁双场和一套固化光磁双场；所述印刷基材(1)被传送且依次经过所述至少一套成像光磁双场和所述固化光磁双场；所述成像光磁双场包括光场和磁场(2)，所述光场和磁场(2)分别设置于所述印刷基材(1)的上方和下方，所述磁场(2)用于对所述印刷基材(1)的可诱导的油墨涂层进行诱导，形成磁场图案，所述光场采用透明菲林(4)为图案载体，用于将经过所述磁场(2)诱导的油墨涂层的与所述图案对应的部分固化；所述固化光磁双场包括固化光源(8)和固化磁场(9)，所述固化光源(8)和所述固化磁场(9)分别设置于所述印刷基材(1)的上方和下方，或者，所述固化磁场(9)的一极设置于所述印刷基材(1)的上方，固化磁场(9)的另一极设置于所述印刷基材(1)的下方，使得所述固化磁场(9)可对所述油墨涂层的未被所述光场照射的部分进行再次诱导，所述固化光源(8)用于对再次诱导的所述油墨涂层进行固化。
  2. 根据权利要求1所述的制备系统，其特征在于，所述透明菲林(4)的透光率为70-100％。
  3. 根据权利要求1所述的制备系统，其特征在于：所述固化磁场(9)的一极和所述固化磁场(9)的另一极对称设置且二者与所述印刷基材(1)的表面相垂直，或者二者与所述印刷基材(1)的表面相倾斜。
  4. 根据权利要求3所述的制备系统，其特征在于：所述平行光源(3)包括光源和平行光镜头，所述光源为UV光源或EB电子束，对应的可诱导油墨为UV固化油墨或电子束固化油墨。
  5. 根据权利要求4所述的制备系统，其特征在于：所述磁场和/或固化磁场为永磁场、电磁场或履带式磁场；所述永磁场或电磁场的形状是柱形、马蹄形、平面形、球冠型或垂直方向的叠加磁场，所述履带式磁场的履带为橡胶磁式的履带或者装夹磁板的履带。
  6. 根据权利要求5所述的制备系统，其特征在于，所述安全图案包括二维码和可变码，所述磁场(2)为固定平面磁场，所述固定平面磁场在移动方向的一段区域内磁场的分布相同；所述磁场(2)用于对所述印刷基材(1)的可诱导的油墨涂层进行诱导，对应的油墨涂层内的颜料片排列在一个平面上，所述光场用于将经过所述磁场(2)诱导的油墨涂层的被所述光场照射的部分进行固化。
  7. 根据权利要求5所述的制备系统，其特征在于，所述磁场(2)与所述印刷基材(1)同步移动。
  8. 根据权利要求7所述的制备系统，其特征在于，所述光场为可变光场，包括平行光源(3)及可变光栏，所述平行光源(3)的光经过所述可变光栏投射于所述印刷基材(1)的表面上，所述平行光源(3)、平行光镜头及可变光栏自上而下依次设置，所述可变光栏包括透明菲林(4)、菲林传动系统(5)、固定的喷墨系统(6)和喷墨干燥单元(7)，所述菲林传动系统(5)将所述透明菲林(4)与所述印刷基材(1)同步传动，所述喷墨系统(6)和所述喷墨干燥单元(7) 能够连续向移动的透明菲林(4)的表面输出可变的光栏图案，所述平行光源(3)的出射光透过已有所述光栏图案的所述透明菲林(4)后投射于所述印刷基材(1)的表面，使得所述光栏图案被转移到印刷基材(1)的表面的油墨涂层中。
  9. 根据权利要求7所述的制备系统，其特征在于，所述光场包括平行光源(3)和固定光栏，所述固定光栏包括与所述印刷基材(1)同样的线速度循环传动的具有连续的预制图案的透明菲林(40)和固定的遮光体(500)，所述遮光体(500)上设有透光缝(510)，所述透明菲林(40)移动经过所述遮光体(500)，所述平行光源(3)设置于所述遮光体(500)的上方，平行光源(3)依次透过所述透明菲林(40)和透光缝(510)后投射于所述印刷基材(1)的所述油墨涂层上，并将透明菲林(40)上的裸露在透光缝上的预制图案部分转移到印刷基材(1)表面的油墨涂层中。
  10. 根据权利要求7所述的制备系统，其特征在于，所述光场为固定光栏，所述固定光栏包括预制有连续图案的透明菲林(40)及平行光源(30)，所述透明菲林(40)与所述印刷基材(1)以相同的线速度被传送，所述透明菲林(40)被传送至所述平行光源(30)和所述印刷基材(1)之间时，所述平行光源(30)的出射光经所述透明菲林(40)投射于所述印刷基材(1)表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
  11. 根据权利要求7所述的制备系统，其特征在于，所述光场为脉冲式光栏，所述脉冲式光栏包括平行光源(3)和预制有图案的脉 冲式传动透明菲林(4)，所述平行光源(3)设置于所述透明菲林(4)上方，所述透明菲林(4)的每一次脉冲传动，均使得其上的一个或一组图案位于所述平行光源(3)和所述印刷基材(1)之间，所述平行光源(3)的出射光经所述透明菲林(4)的所述图案投射于所述印刷基材(1)表面的油墨涂层上，从而将所述图案转移到所述油墨涂层中。
  12. 根据权利要求1所述的制备系统，其特征在于，当所述磁场(2)和所述固化磁场(9)均设置于所述印刷基材(1)的下方时，所述磁场(2)和所述固化磁场(9)二者的两极上下方向相反。
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