Film for thermal transfer printing (versions)

FIELD: printing.

SUBSTANCE: invention relates to printing, namely, the means used for thermal applying of alphanumeric symbols or images on the surface of various products. Film for thermal transfer printing is a composite material formed of a set of layers, the first of which is the main-bearing, the second is separating, the third is coloring, and the layers have respective melting points, determined by the technology of film application. At the same time in one of the layers or simultaneously in several layers there is at least a portion of material which is uniformly distributed or distributed to individual sites, and having the ability to function as an optical marker in the range of ultraviolet, infrared, or X-rays radiation.

EFFECT: proposed new film for thermal transfer printing enables to identify both the film and the products on which it is applied, as well as to provide a high degree of protection against counterfeit production.

5 cl, 6 dwg, 3 ex

 

The present invention relates to the printing industry, namely to the means used for thermal spraying alphanumeric symbols or images on the surface of various articles, such as vehicle license plates, labels and packaging.

The closest to the proposed solution is patent US 5393590 "NOTES STAMPING FOIL, date of publication, 02/28/1995, the patentee Minnesota Mining and Manufacturing Company (St. Paul, MN), which describes foil for hot stamping used for printing on various substrates using thermal transfer. In essence, this is the film for thermal transfer printing, which represents a composite multilayer material, which consists of a base, the separation layer and the dye layer.

This tape can be used for printing with the formation of good adhesion of the print to highly resistant substrates, in particular retroreflective substrates, which are used, for example, for the manufacture of license plates of cars.

This invention is selected for the prototype because it contains the largest number of essential features, coinciding with the essential features of the claimed invention.

However, the prototype has a significant drawback. Famous film has a limitation in functional use, pascalc what it is intended only for creating graphic images on various products for reading the image with the naked eye and cannot be used to protect products from counterfeiting or to create the hidden identity of the film and the product on which the applied film.

The present invention is to create a new film for thermal transfer printing, which would ensure the achievement of the following technical results.

1. The possibility of hidden identity film for thermal transfer printing and products, on which it is applied or in which it is Packed.

2. Improving the protection film and articles, which used film, from counterfeit production.

The task of creating a new film for thermal transfer printing solved as follows.

In the famous film for thermal transfer printing, representing a composite material formed from a set of layers, the first of which is the main bearing, the second separator, and the third coloring, while layers have respective melting point, determined by the technology of the film, according to the present invention in one layer or in several layers include at least part of the substances are evenly distributed or distributed in some areas and has the ability to perform the function of an optical marker in the range of ultraviolet, infrared or x-ray radiation.

Also possible is an embodiment of the invention, CR is which as substances, able to perform the function of optical markers, applied luminescent material.

There is another version of the film for thermal transfer printing, in which between the separator and the coloring layers introduced graphical layer containing at least a portion of a substance that has the ability to perform the function of an optical marker in the range of ultraviolet, infrared or x-ray radiation. At the same time as substances that can function as optical markers, applied luminescent material.

Also possible is an embodiment of the invention, in which the composition of the dye layer is introduced graphic layer.

This new technical solution to all your set of essential features allows you to provide a hidden identity films and articles coated with a described film for thermal transfer printing, as well as to provide high protection film and articles, which used film, from counterfeit production. This is due to the fact that the layers of the inserted part of the substances which can be distributed in separate layers or in several, that allows you to create labels of different configurations, and consequently, varying degrees of protection. If necessary, a hidden product labelling (for hidden their identification) tags may be invisible to the naked eye,and for their detection requires the use of a special device.

The applicant conducted a patent search on the topic and the proposed set of essential features is not revealed. Therefore, the present invention can be recognized as new.

This invention meets the patentability criterion of "inventive step", as it is for the average it professional qualification does not follow logically from the prior art. However, there are other prototype, multilayer films for thermal transfer printing, for example of the invention Russia and the United States (Patent RF №2340461, U.S. Patent No. 5393590, 3770479, 3953635). These films serve to create graphic images on various products, including reflective number plates, stickers or emblems, and contain several layers, including a base, a separating layer, coloring layer, identifiable visible to the naked eye range. But such films and/or products coated film can be fake, and install this fact is often not possible.

Currently there is an acute problem of reliable identification of such products as, for example, license plates for automobiles, packaging products. Therefore, it is necessary to eliminate errors of identification and to prevent delays in receipt of information to stakeholders.

Another problem of the modern market - led is giving volume of low-quality counterfeit products. As a result of penetration of goods unscrupulous manufacturers in the consumer markets formed the shadow sector of the economy, discredited the authority of entrepreneurs, companies and consumers are material and moral losses. Therefore, create and other than the inventive film, printing film, which also has elements that can perform the function of a hidden marker, requiring for their discovery of a special device. For example, the famous patent of the RF No. 2339524 on the invention of the Printing film for the production of counterfeit automobile license plates and is protected from a fake car license plate containing the same print film. This printed circuit film includes a film carrier, and a transferable layer which can be separated from the film carrier and which can be fixed on the basis of the automobile license plate. The conversion layer from the carrier film carrier includes a removable transparent layer, an opaque decorative layer, a transparent protective layer, an optically variable layer, a reflective layer, a colored layer and the adhesive layer. The decorative layer has mutually spaced zonal breaks, in which a transparent protective layer adjacent to the removable layer. Zonal gaps in the opaque decorative layer may have a peripheral edge graphics con is Horatii. Zonal breaks can play, for example, the arms, the subject of flora such as palm or tree, the subject of fauna, such as an insect, an animal, etc. This provides an additional security feature, which is visible to the observer and which, in addition, improves the security of the automobile license plate from fakes. Optical variable layer is a replication layer with a diffractive relief structure, which can form two-dimensional or three-dimensional hologram.

However, this invention is not solved the problem of identification of products.

In addition, given that UV markers are available and widely used means of protecting products against counterfeiting, such markings can be forged.

In the inventive same the invention features a film for thermal transfer printing with the introduction of its composition protective optical markers, the hallmark of which are spectral characteristics that make up a certain predefined spectral code that can be read with the proper code reader or device without applying them. The readout optical markers can be in the visible, ultraviolet, infrared and x-ray regions of the spectrum. Thus, the proposed film for thermal transfer the printing can be used not only for printing the image or painting the surface of various materials, including reflective materials, method of hot stamping (thermal transfer printing), but also to create opportunities to identify products (including hidden identification) and its protection against counterfeit production. Fake optical markers included in the described film, it is theoretically possible, but not economically profitable, and therefore unlikely, as the fake will require a high cost.

From the above it follows that the claimed invention meets the patentability criterion of "inventive step".

The essence of the proposed film for thermal transfer printing and the possibility of its practical implementation is illustrated in the following description and drawings, which represent possible locations of the layers in the composition of the film.

Figure 1. A possible variant of the structure of the film for thermal transfer printing, where there are three layers, and the coloring layer evenly entered the phosphor.

Figure 2. A possible variant of the structure of the film for thermal transfer printing, where there are three layers, and the coloring layer regularly into separate sections introduced the phosphor.

Figure 3. A possible variant of the structure of the film for thermal transfer printing, where there are three layers, and in the separation layer ravnomernogo the phosphor.

Figure 4. A possible variant of the structure of the film for thermal transfer printing, where there are four layers, while in the graphics layer evenly entered the phosphor.

Figure 5. A possible variant of the structure of the film for thermal transfer printing, which has four layers, and the coloring layer evenly entered the phosphor.

6. A possible variant of the structure of the film for thermal transfer printing, where there are three layers, and in the separation and pigment layer evenly entered the phosphor.

The proposed film for thermal transfer printing is a composite material and contains a set of layers (Fig.1-6). One of the layers is a base layer 1. Usually it is made from heat-resistant polymer with a melting point above the melting temperature of the other layers. Another layer is the separation layer 2, and the third coloring layer 3.

In one of the two layers has at least a portion of a substance that has the ability to perform the function of an optical marker in the range of ultraviolet, infrared or x-ray radiation. As substances that can function as an optical marker can be applied to the phosphor 4, or evenly distributed in Crusader layer 3 (Fig 1, 5) or division 2 (3), or both (6.), or distribution is Yong parts of the dye layer 3 (figure 2), or dividing 2, or both (not shown).

Between the separator 2 and dye 3 layers can be entered graphical layer 5 (figure 4) as an additional visual identification of the film. This layer can contain graphical elements, for example, this may be the logo of the country or region where this film can be used for painting plates (not shown). Graphic layer 5 may also contain a phosphor 4, evenly distributed (figure 4) or on separate plots (not shown). Graphic layer 5 can be performed separately or can be introduced into the coloring layer 3 (not shown).

As the base layer 1 can be used, for example:

1) a polymer film with a thickness of 4 to 30 μm, stable physical and mechanical characteristics in the temperature range from -30°C up to +220°C, made of polyethylene terephthalate, polyamide, copolymers of polytetrafluoroethylene, copolymers of cellulose;

2) siliconized paper thickness 25-110 mm.

The thickness of the base layer 1 is determined by the fact that too thin a basis is not strong enough, too thick has poor conductivity and degrades the resolution of the imprint.

The separation layer 2 can be selected from considerations of the balance of adhesion and separation properties between the base and the colored layer. It can be selected, for example, from materials containing wax. Typically, the thickness of the separation layer is about 0.1 μm.

Coloring layer 3 has an adhesive property between the base 1 and the separating layer 2, it also determines the appearance of the obtained graphic images. Coloring layer may have a thickness in the range of 2-9 μm with a melting point in the range of 130-180°C. the thickness of the layer is due to the fact that a too thick layer may reduce the conductivity of the coating and degrade the appearance of the printed impression. Too thin a layer leads to the reduction of operational properties of the print. Polymer layer dyed with pigments of different colors, depending on the purpose of the film for thermal transfer printing. Typical coloring layer 3 contains one or more colors from the following range: cellulose paint, vinyl paint, polyurethane paints, acrylic paints. The desired composition can be picked up by a specialist in this field.

As phosphors 4 can be used compounds having the ability to photoluminescence under UV, infrared or x-ray radiation, for example:

1) connection-based oxyhalogenation yttrium;

2) connections on the basis of oxysulfides lanthanum-neodymium;

3) connections on the basis of axis is hidow yttrium-lanthanum or based on other organic and inorganic compounds, having the properties of photoluminescence in the spectral range of detection.

Thus, it can be implemented the following options compositions separation, coloring and graphic film layers for termotransferowy printing.

Example 1

The separating layer
Component nameThe content in the composition, wt.%
Aqueous dispersion montenuovo wax25-45
Dispersion of a copolymer of styrene with Acrylonitrile5-15
Butyldiglycol1-3
Terpineol (antifoam)0,05-0,08
Coloring layer
Aqueous dispersion of a copolymer of butyl acrylate with methyl methacrylate35-65
Pigment (dispersion of carbon black)15-35
Photoluminous (optical marker) of 0.1-0.3
Filler (dispersion of silicon oxide)15-45
Butyldiglycol1-3

Example # 2

The separating layer
Component nameThe content in the composition, wt.%
Aqueous dispersion of polyethylene wax25-45
Dispersion of a copolymer of styrene with butadiene5-15
Butyldiglycol1-3
The mixture of esters of fatty acids C17-C31 (antifoam)0,05-0,08
Coloring layer
Aqueous dispersion of a copolymer of vinyl chloride with vinylidenechloride35-65
Pigment (dispersion of carbon black)15-35
Photoluminous (optical marker)of 0.1-0.3
Filler (dispers what I oxide silicon) 15-45
Butyldiglycol1-3

Example No. 3 (graphics layer)

The separating layer
Component nameThe content in the composition, wt.%
The aqueous dispersion of the siloxane resin15-35
Dispersion of a copolymer of styrene with butadiene20-35
Butyldiglycol1-3

The mixture of esters of fatty acids C17-C31 (antifoam)0,05-0,08
Graphic layer
Aqueous dispersion of a copolymer of vinyl chloride with vinylidenechloride35-65
Photoluminous (optical marker)of 0.1-0.3
Filler (dispersion of polystyrene)15-45
Coloring layer
Aqueous dispersion from which alimera of vinyl chloride with vinylidenechloride 35-65
Pigment (titanium dioxide)10-35
Butyldiglycol1-3

The invention is carried out by known techniques, which is as follows.

The main layer is made separately, then his cause of separation and the coloring layer sequentially method of gravure printing, flexographic printing method, a kiss coating, doctor blade system or dosing system using an air brush.

For example, the composition of the separation layer in the above examples is applied on the polyethylene terephthalate film of a thickness of 12 μm gravure printing using a printing cylinder with a frequency of 100 l/cm, the drying is carried out at a temperature of 90°C.

Then put the composition of the dye layer gravure printing using a printing cylinder with a frequency of 60 l/cm, the drying is carried out at 90°C.

The graphic layer can be performed by known methods of printing (gravure printing, flexographic printing, screen printing) using the standard printing inks, varnishes or using a composition similar to the composition of the dye layer film, a different color is applied pigment or dye.

The phosphor introduces the pigment, separation or graphics layer or in several layers at once, evenly or in a separate regularly spaced plots.

Next, make the printing process, which occurs at the contact of thermoplastic pigmented dye layer with the coated substrate (e.g., embossed alpha-numeric designation on the workpiece plate) at a temperature of 170-210°C and a pressure of 1-10 kg/cm2. When this pigment pigmented thermoplastic layer is welded to the substrate and is separated from the film base. Thus in place of the contact is formed on the substrate a colored film coating.

In essence, the proposed new film for thermal transfer printing, in which there are optical markers allows the identification of both the film and the product to which it is applied, and also to provide a high degree of protection against counterfeit production.

1. Film for thermal transfer printing, representing a composite material formed from a set of layers, the first of which is the main bearing, the second separator, and the third coloring, while layers have respective melting point, determined by the technology of film, characterized in that one layer or multiple layers include at least part of the substance, Rav is oorno distributed or distributed on separate plots, and having the ability to perform the function of an optical marker in the range of ultraviolet, infrared or x-ray radiation.

2. Film for thermal transfer printing according to claim 1, characterized in that as substances that can function as optical markers, applied luminescent material.

3. Film for thermal transfer printing, representing a composite material formed from a set of layers, the first of which is the main bearing, the second separator, and the third coloring, while layers have respective melting point, determined by the technology of film, characterized in that between the separation and the coloring layers introduced a graphical layer that contains at least part of a substance that has the ability to perform the function of an optical marker in the range of ultraviolet, infrared or x-ray radiation.

4. Film for thermal transfer printing according to claim 3, characterized in that as substances that can function as optical markers, applied luminescent material.

5. Film for thermal transfer printing according to claim 3, characterized in that the composition of the dye layer is introduced graphic layer.



 

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