WO2016171591A1

WO2016171591A1 - Valuable document comprising a multilayer polymeric structure and method for personalizing a valuable document

Info

Publication number: WO2016171591A1
Application number: PCT/RU2016/000239
Authority: WO
Inventors: Игорь Васильевич ПАВЛОВ; Георгий Валентинович КОРНИЛОВ; Елена Михайловна ФЕДОРОВА; Александр Георгиевич ПИСАРЕВ; Елена Самуиловна ТУРКИНА; Анатолий Павлович ГУБАРЕВ; Дмитрий Борисович ЧЕКУНИН; Александр Александрович СУХОДОЕВ
Original assignee: Федеральное Государственное Унитарное Предприятие "Гознак" (Фгуп "Гознак")
Priority date: 2015-04-24
Filing date: 2016-04-25
Publication date: 2016-10-27

Abstract

The invention relates to the field of security printing, and more particularly to making and personalizing plastic documents. The proposed valuable document comprises a multilayer polymeric structure, in which one or more layers have an optically variable effect and contain security features. At least one of the layers, which is a registering layer, is made from a polymeric composite material with a glass-transition temperature of from 20 to 100°C, which is reactive to temperature and to optical, x-ray and electron-ion radiation, resulting in irreversible polymerisation, wherein said layer contains a filler in the form of magnetic particles, which form personalized images that are visible in transmitted or reflected light.

Description

VALUABLE DOCUMENT CONTAINING

MULTILAYERED POLYMERIC STRUCTURE, AND METHOD FOR PERSONALIZING A VALUABLE DOCUMENT

The invention relates to the field of security printing, and more specifically, to the manufacture and personalization of plastic documents, such as a passport, driver's license, identity card.

State of the art

Currently, there are several ways to personalize documents. Until recently, the method of introducing, pasting photographs and identification data printed on paper or polymer media between the plastic layers forming the card or page of a document was widely used (RU42474 U1, 12/10/2004). This method of personalization is time-consuming and almost impossible to automate. In addition, plastic documents of this type are easily falsified and modified by layering ready-made documents and introducing new personal data into them.

More modern is the technology for printing personal data, including a portrait, with special polymer inks on the inner polymer layers documents in the process of their production (RU 2474498 C2, 02/10/2013). This technology requires the availability of expensive equipment and special components.

The disadvantage of the above technologies is the need for personalization of certification documents in their manufacture. Personalization of ready-made forms of documents for such technologies is not provided or difficult, and often, as in the first case, does not provide the necessary level of protection of the entered information in the identification documents.

More common at present is the technology for introducing personal and identification data using laser engraving methods (RU 99108732 02.27.2001). In this case, images and text are recorded by a laser beam on a transparent photosensitive polymer layer inserted into a plastic document, for example, on a carbonized polycarbonate film. This technology is very widespread and can be implemented using inexpensive equipment and available components. However, this also leads to a relatively easy forgery and imitation of documents.

Protective features are known in the form of multilayer structures containing layers with specific physical and chemical properties, for example, luminescent, magnetic, electromagnetic, thermochromic and others (RU 2377134 C2, 12/27/2009). The formation of color images is carried out, in particular, by laser engraving in combination with special protective effects recorded by hardware. Such technologies are implemented using inexpensive equipment and available components. However, this also leads to a relatively easy forgery and imitation of documents. In addition, special expensive equipment must be used to authenticate.

Disclosure of invention

The problem solved by the invention is the creation of a personalization technology for a valuable document, in which the effect of changing a personal attribute is clearly visible to the naked eye by the characteristic features of images formed by exposure to a valuable document with external radiation.

This is achieved by the fact that a valuable document containing a multilayer polymer structure in which one or more layers have an optically variable effect and contain security features, according to the invention, at least one of the recording layers is made of a polymer composite material with a transition temperature in the viscous-fluid state from 20 to 100 ° C and having a reactivity to temperature and optical, radiation, electron-ion radiation, leading to irreversible polymerization, and this layer contains a filler in the form of magnetic particles that form personalization images distinguishable in transmitted or reflected light.

In special cases, magnetic particles have the form of plates - flakes, needles, or close to a spherical shape. Magnetic particles can be made of transparent or translucent materials, and can also have a color or interference coating.

The problem is also solved by the fact that the proposed method of personalization of the valuable document described above. The method includes forming a personalization image by exposing the recording layer to an external magnetic field and radiation, according to the invention, recording a personalization image is carried out by exposing the recording layer to a magnetic field of a certain direction and magnitude and radiation, leading to a decrease in viscosity and / or irreversible polymerization of the material of the recording layer in irradiated areas. In the particular case, after recording a personalization image, an additional polymerisation operation is possible.

In particular, a personalization image is recorded using external laser radiation. Recording personalization images is possible using wide beams of radiation and controlled and / or uncontrolled banners.

The formation of a personalization image, according to the invention, occurs when the areas of the recording layer are combined with a magnetic field and external radiation (irradiation with IR, light, UV, X-ray, radiation, electron or ion beams), leading to polymerization crosslinking of the polymer-oligomer-monomer base material recording layer.

To do this, point-by-point or analog (continuous) recording of personalization images by focused or defocused radiation through transmitting controlled or uncontrolled banners in a recording polymer composite layer containing a filler in the form of magnetic particles is carried out. Moreover, in the areas subjected to irradiation, reorientation and redistribution of magnetic particles occurs and their subsequent fixation due to the simultaneous and / or subsequent crosslinking of the polymer-oligomeric-monomer base of the recording layer in the places subjected to irradiation. In particular cases, after recording a personalization image, polymerization of the recording layer by external radiation is additionally carried out.

The distribution and orientation of magnetic particles is determined by the viscosity of the material of the layer, the method of its deposition, the magnetic characteristics and shape of the magnetic particles, and the magnitude and direction of the acting magnetic fields. When exposed to thermal, infrared, or ultraviolet radiation on the areas of the recording layer, the position of the magnetic particles is fixed, in particular, images can be formed using radiation from laser and LED emitters or lamps with a wide spectral range from 200 nm to 10,000 nm). Changing the magnetic field acting on the recording layer during the recording process upon irradiation of its various regions, various irreversible spatial distributions of magnetic particles are formed in them. In the particular case, it is possible to record images using controlled or uncontrolled spatial and space-time modulators with wide pulsed radiation beams of sufficiently high power.

Images can be black and white, grayscale and color. In the latter case, a mixture of magnetic particles colored in various colors, for example, red, green and blue, while recording is carried out sequentially at the corresponding wavelengths.

When using submicron and nanoscale magnetic particles, not only point-by-point pixel recording of images and text is possible, but also diffraction and holographic recording.

It is possible to record images on thin (10-20 μm) transparent polymer films made of polyethylene terephthalate (PET), polycarbonate (PC) or polypropylene (1111) coated with thin (5-50 μm) transparent layers of polymer composite materials, for example, polyethylene or polyoxyethylene , with a low melting point (70 - 150 ° C) with magnetic particles introduced into them and / or on their surface with a surface coating density close to 100%. As magnetic particles can be used, for example, particles of powdered magnetic pigments manufactured by Guangzhou Sheenbow Pigment Technology Co. Ltd. (China), SICPA (Switzerland), or ITW MAGNAFLUX (USA).

For example, when exposed to polymer films with such magnetic coatings by focused pulsed laser radiation, for example, in the IR range at a wavelength of 1, 06 - 1.3 μm using laser engraving installations and simultaneous exposure to the film a constant or pulsed magnetic field of a certain direction and magnitude during a laser pulse, for example, a field perpendicular to the plane of the film and

2 5

value of the order of 10 - 10 AUM conduct point-by-point recording with a point size equal to the diameter of the focused laser beam. The recording is carried out by heating the magnetic particles with laser radiation, while the particles heat the thermoplastic polymer material around them. Magnetic particles rotate in a heated viscous flowing polymer in the direction of the applied magnetic field and / or line up into thin filament-like formations along the lines of the magnetic field. After the action of the laser pulse, the thermoplastic polymer cools and fixes the position of the rotated and aligned magnetic particles.

Brief Description of the Drawings

To illustrate the claimed invention in FIG. 1 shows a recording scheme of a personalization image with a focused laser beam.

In FIG. 2 shows a recording scheme of a personalization image by unfocused radiation using a banner. The best example of carrying out the invention

Example 1

Consider recording a personalization image with a focused laser beam (Figure 1). In a multilayer plastic document 1, under the transparent coating layer 2, a recording layer 3 is placed with a sufficiently low (20 ° C-100 ° C) softening temperature — a transition to a viscous-fluid state. It may also be in a viscous liquid state prior to image recording procedures. In this case, we used a layer of transparent sevilen doped with activators, which made it possible to fix the temperature of its transition to a viscous-fluid state in the range (20 ° С-100 ° С). The specified layer is located on the polymer substrate 4 and contains a powdery filler in the form of magnetic particles uniformly distributed throughout the volume of the recording layer.

Recording identification information was carried out as follows. An identification document was placed in a magnetic field 5 from a source of a uniform magnetic field 6 and the standard laser engraving procedure was carried out from the side of the transparent coating layer 2 in the same way as when recording identification information on plastic documents with photosensitive (laser active) polycarbonate films. With a focused laser beam 7, usually with a radiation wavelength in the IR range (λ = 1.06 μm or λ = 1.3 μm), and with a beam diameter of 20 μm - 100 μm, regions 8 of the recording layer with magnetic particles 9 are illuminated pulsed, dotted areas due to heating, the viscosity of the recording layer decreases, and the magnetic particles under the action of the applied external magnetic field 5 are oriented and spatially redistributed. This is how personalization images are formed. In places of exposure to a laser beam, the reflection and transmission parameters of light change. The obtained spatial distributions of magnetic particles, and therefore the formed images, are fixed in the process of cooling the heated regions and the irreversible polymerization crosslinking of the polymer material of the recording layer.

In the particular case, more rigid fixation of images can be carried out by irradiating them during recording or after its implementation by radiation, which leads to crosslinking of the polymer material of the recording layer. In this example, the sevilen-based layer was irradiated in an electron-irradiation unit L-210 with electron beams with a power of 2-10 MEV. Due to the polymerization of the material a recording layer in contact with magnetic particles, it is impossible to re-record in places with already recorded. The latter circumstance is important to prevent the possibility of unauthorized rewriting of personalization and identification information. Personalization images obtained using reoriented magnetic particles can easily be distinguished in transmitted or reflected light upon visual observation of the document.

Example 2

Consider recording a personalization image (Fig. 2), by irradiating the IR or UV spectrum with an unfocused, wide, spatially uniform beam of radiation 7 through cells of a controlled or uncontrolled transparency 1 1. As emitters 10, industrially produced IR or UV lamps are used. The radiation passing through the open cells of the transparency 12 and the transparent protective layer 2 enters the region 13 of the recording layer 3 with magnetic particles 9, previously oriented parallel to the plane of the recording layer.

The recording layer is located on the base 4, which can be transparent, translucent and opaque. During recording, the recording layer is affected the magnetic field 5 created by the source 6. Under the influence of a magnetic field and irradiation through open transparency cells, the magnetic pigment particles unfold in the field direction and are fixed in this position due to the irreversible polymerization of the polymer-oligomer-monomer base of the recording layer. In this case, the magnetic field is perpendicular to the plane of the recording layer. Particles were previously oriented parallel to the plane of the recording layer. After recording, magnetic particles in the irradiated regions 8 will be fixed in the field direction during recording. In unirradiated regions, the position of the particles remains unsecured and can change when exposed to external fields. The configuration of the location of open transparency cells determines the configuration of the generated images. The recording time of one image depending on the composition of the basis of the recording layer was several seconds. Since magnetic particles are fixed only in the irradiated areas, when opening new transparency cells and changing the direction of the magnetic field 5 during subsequent recording cycles, other images may form in the recording layer. The contrast of the observed images in reflected or transmitted light is determined the location of magnetic particles in the irradiated local areas.

Image recording can also be carried out through uncontrolled banners. In this case, the banners are made in the form of transparent plates with coatings that are opaque to the radiation used in the recording. Images in banners are formed by local removal of opaque coatings. The recording of various images in one recording layer is carried out by placing the recording layer under the plates with different images and changing the direction of the magnetic fields when recording each image. Industrial applicability

The invention is applicable in the field of security printing, and more specifically, in the manufacture and personalization of plastic documents, such as a passport, driver’s license, identity card.

Claims

CLAIM

1. Valuable document containing a multilayer polymer structure in which one or more layers

5 have an optically variable effect and contain protective features, characterized in that at least one of the recording layers is made of a polymer composite material with a transition temperature in the viscous-fluid state from 20 to 100 ° С and with reactivity to exposure to temperature and optical, radiation, electron-ion radiation, leading to irreversible polymerization, and this layer contains a filler in the form of magnetic particles that form personalization images,

15 distinguishable in transmitted or reflected light.

2. Valuable document according to claim 1, characterized in that the magnetic particles are in the form of plates or flakes, or needles, or close to a spherical shape.

3. Valuable document according to claim 1 or claim 2, characterized in that the magnetic particles are made of transparent or translucent materials.

4. Valuable document according to any one of paragraphs 1-3, characterized in that the magnetic particles have a color or interference coating.

5. A method of personalizing a valuable document described in any one of paragraphs 1-4, including the formation of a personalization image by exposing the recording layer to an external magnetic field and radiation, characterized in that the recording of the personalization image is carried out when the recording layer is exposed to a magnetic field of a certain direction and magnitude and radiation, leading to a decrease in viscosity and / or irreversible polymerization of the material of the recording layer in the irradiated areas.

6. The method according to p. 5, characterized in that after recording a personalization image, polymer polymerisation is additionally carried out.

7. The method according to p. 5, characterized in that the personalization image is recorded using external radiation from laser sources.

8. The method according to p. 5, characterized in that the recording of personalization images is carried out using wide beams of radiation and controlled and / or uncontrolled banners.