CN110039935B - High-definition transfer film without separating agent layer and preparation and application thereof - Google Patents
High-definition transfer film without separating agent layer and preparation and application thereof Download PDFInfo
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- CN110039935B CN110039935B CN201910250901.9A CN201910250901A CN110039935B CN 110039935 B CN110039935 B CN 110039935B CN 201910250901 A CN201910250901 A CN 201910250901A CN 110039935 B CN110039935 B CN 110039935B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/025—Duplicating or marking methods; Sheet materials for use therein by transferring ink from the master sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B44—DECORATIVE ARTS
- B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
- B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
- B44C1/16—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like
- B44C1/165—Processes, not specifically provided for elsewhere, for producing decorative surface effects for applying transfer pictures or the like for decalcomanias; sheet material therefor
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Abstract
The invention discloses a high-definition transfer film without a separating agent layer, which comprises a carrier film, a modulated color ink powder image-text layer and a high-definition transfer film prepared by a digital rotary printing machine, wherein the peel strength is 0.03N/25 mm-0.11N/25 mm; the carrier film is a transparent nonpolar plastic film, and the corona value of the printing surface of the carrier film is 30 mN/M-37 mN/M; the corona value of the modulated color toner image-text layer is 38 mN/M-60 mN/M, and the modulated color toner image-text layer comprises thermoplastic resin; the digital rotary printing machine is used for carrying out primary imaging based on the LED or laser array toner electrophotography principle, heating, pressurizing, melting, superposing and fixing the modulated color toner image-text layer on the surface of the carrier film, and solves the problems that the existing transfer film is low in printing pixel, low in shallow dot display performance and the like.
Description
Technical Field
The invention relates to a transfer printing technology, in particular to a high-definition transfer printing film without a separating agent layer, a preparation method thereof and application thereof in the field of thermal transfer printing.
Background
Traditional printing processes such as screen printing, letterpress printing, gravure printing and offset printing are commonly used in the printing industry, are very suitable for large sheets and long sheets, and are well known. The development of new printing technology derived from the cross fusion of the traditional printing technology and other disciplines and industries is also continuous, and the transfer printing is one of the most representative printing technologies.
The printing process of transferring and curing the image and text on the intermediate carrier to the substrate using appropriate conditions, such as temperature, pressure, time, etc. and appropriate facilities is collectively referred to as transfer printing. The transfer printing can be classified into thermal transfer printing, gold stamping, cold stamping, sublimation transfer printing, air pressure transfer printing, in-mold transfer printing, water transfer printing, and the like, according to different conditions of the method.
At present, the intermediate carrier is printed with pictures and texts, and the printing plate can not be separated, and the plate making is needed no matter gravure, flexo printing, offset printing or simple screen printing and pad printing, and the manufacturing cost of some plate making is very high, such as the electroengraving plate and the laser plate of gravure, which is a considerable burden. Various plate-making processes have specific procedures and process requirements, namely, specific plate-making time periods are required, and basically, the plate-making processes are not reversible, when a plate-making process is careless and flawed, the whole plate-making work is likely to be reversed, even the original draft needs to be modified, and the process needs a lot of working hours.
More importantly, some plate making processes have objective limitations, such as the situation that the pixels displayed by screen printing and embossing are low, and the shallow dot display performance is low, and undoubtedly have defects for exquisite requirements and high-grade secondary requirements.
The production of any transfer film, even in the case of small-scale production or machine proofing, does not leave the most basic requirements of overprint registration and color registration, and the printing process is certainly existed and waste is directly generated.
Chinese patent publication No. CN101734030A discloses "a method and apparatus for printing images and texts on irregular object surface" discloses a transfer film with a two-layer structure, but its base material is limited to water-soluble films such as PVA, starch, etc., and the ink is limited to traditional solvent-based pigment ink, and does not have feasibility of digital printing preparation, and the transfer film itself can only be applied to curved surface coating, i.e. water transfer, and cannot be extended for use, and has serious application obstacles and limitations.
The method for film transfer printing disclosed in chinese patent ZL201110201842 also provides a transfer film only adopting a two-layer structure and a method for in-mold transfer printing thereof, although the method has a unique structure and practically meets the industrial mass production of in-mold transfer printing, the preparation of the transfer film is printed by using a traditional gravure printing machine, the process is relatively laggard, high-resolution high-definition printing cannot be realized, the short single loss ratio is large, the plastic uptake type PVC carrier film has low temperature resistance, is very easy to be heated and deformed, and is not suitable for the out-mold heat transfer printing.
The Chinese patent distribution No. CN201710006596 discloses 'a transfer printing film prepared by digital printing, a preparation method and application thereof', the method for preparing the transfer printing film by adopting a digital rotary printing machine is greatly improved from the advanced degree, the color toner which takes thermoplastic polyurethane as a main material and is matched with a water-based wax layer also has very high environmental protection, but the image resolution of printed images and texts is not described, the production mode that the water-based wax is used as a separating agent layer and the solvent-based glue is coated on the color image and text layer in an overlapping way is adopted, the production complication, the structure complication and the pollution and loss are also inevitably caused, more importantly, after the transfer printing film is applied to the external thermal transfer printing, the printing surface of the printing stock is equal to the existence of a water-based wax layer, and the subsequent processing of the printing stock, particularly the subsequent processing with the adhesion requirement, such as gold stamping, ultrasonic welding, and the like, Glue adhesion, overlay transfer, etc. all bring about a fatal defect of non-adherability, with also significant improvement.
Disclosure of Invention
The technical problem to be solved by the embodiment of the invention is to overcome the defects in the prior art, and provide a high-definition transfer film which utilizes corona value difference to replace a separating agent layer and uses a digital printing technology, a preparation method and application thereof, wherein the corona value difference, particularly the corona value difference caused by the intervention of a carrier film, printing ink powder and a printing stock or technical means is utilized to be matched with creative modulation printing ink powder to replace and eliminate the separating agent layer and a glue layer, so that the simplest two-layer structure of the transfer film in the true sense is completely realized, the ink layer is thick, the three-dimensional effect is strong, the weather resistance is high, the resolution of a printed image and text image also reaches the astonishing definition of 1200dpi, and the transfer film is exquisite and absolute.
In order to solve the technical problem, embodiments of the present invention provide a high definition transfer film without a separating agent layer, which uses a corona value difference to replace the separating agent layer, and controls separation and transfer of the high definition transfer film through a suitable corona value difference. The high-definition transfer printing film comprises a carrier film and a modulated color ink powder image-text layer, and is prepared by a digital rotary printing machine, and the peel strength is 0.03N/25 mm-0.11N/25 mm; the carrier film is a transparent nonpolar plastic film, and the corona value of the printing surface of the carrier film is 30 mN/M-37 mN/M; the corona value of the modulated color toner image-text layer is 38 mN/M-60 mN/M, and the modulated color toner image-text layer comprises thermoplastic resin; the digital rotary printing machine is used for carrying out primary imaging based on the LED or laser array powdered ink electrophotography principle, and heating, pressurizing, melting, superposing and fixing the modulated color powdered ink image-text layer on the surface of the carrier film.
Further, the material of the modulated color toner image-text layer comprises the following components: 45-60% of thermoplastic acrylic resin, 25-35% of chlorinated polypropylene resin, 0-20% of pigment, 0-5% of dye, 0.2-0.8% of magnetic iron oxide and 1.5-3% of dielectric additive.
Further, the fixed temperature of the modulated color toner image-text layer is 80-105 ℃ when the modulated color toner image-text layer is fixed on the surface of the carrier film through the digital rotary printing machine.
Further, the fineness of the ink powder of the modulated color ink powder image-text layer is 4-10 micrometers; the image overprinting error of the modulated color toner image-text layer is less than or equal to +/-0.0254 mm; the image resolution of the high-definition transfer printing film is more than or equal to 1200 dpi.
Furthermore, the digital rotary printing machine can simultaneously carry out corona treatment on the modulated color toner image-text layer after printing, and the corona value of the modulated color toner image-text layer after corona treatment is 38 mN/M-60 mN/M.
Further, the modulated color toner image-text layer comprises one or more of CMYK color, white color, spot color and technical color; when the coverage rate of the modulated color toner image-text layer is 100 percent of the monochrome toner, the using amount of the monochrome toner is about 3.5 g/square meter to 5.5 g/square meter; the density of single-color solid printing of CMYK colors is 1.2-2.4.
Furthermore, the anti-counterfeiting label is prepared by a digital rotary press and can be prepared into one or more of surface printing mode pictures and texts, inner printing mode pictures and texts, local pictures and texts, comprehensive pictures and texts, micro pictures and texts, variable data pictures and texts and safety anti-counterfeiting element pictures and texts.
Further, the transparent nonpolar plastic film is a BOPP film or a PE film; the BOPP film is a transparent biaxially oriented non-corona film, and the thickness of the BOPP film is 20-50 micrometers; the PE film is a transparent non-corona film, and the thickness of the PE film is 50-80 micrometers.
Correspondingly, the invention also provides a preparation method of the high-definition transfer film without the separating agent layer, which comprises the following steps:
s1: selecting a BOPP film or a PE film as a carrier film, wherein the corona value of the BOPP film or the PE film is 30-37 mN/M;
s2: the corona value is 38 mN/M-60 mN/M, and the material comprises the following components: 45-60% of thermoplastic acrylic resin, 25-35% of chlorinated polypropylene resin, 0-20% of pigment, 0-5% of dye, 0.2-0.8% of magnetic ferric oxide and 1.5-3% of dielectric additive;
s3: the modulated color toner comprises one or more of CMYK color, white color, spot color and technical color, and the fineness of the toner is 4-10 micrometers;
s4: determining the pattern of the image and text, including one or more of table printing pattern image and text, inner printing pattern image and text, local image and text, comprehensive image and text, micro image and text, variable data image and text and safe anti-counterfeiting element image and text;
s5: the digital rotary printing machine based on LED or laser array powdered ink electrophotography principle one-time imaging is adopted to be matched with the color powdered ink for modulation, and the printing is carried out on the image and the text, the image resolution of the image and the text is more than or equal to 1200dpi, the overprinting error of the image and the text is less than or equal to +/-0.0254 mm, the CMYK color solid-color printing density is 1.2-2.4, the coverage rate of the monochromatic powdered ink is 100%, and the using amount of the monochromatic powdered ink is 3.5 g/square meter to 5.5 g/square meter;
s6: heating, pressurizing, melting and superposing the modulated color toner by a main fixing roller of the digital rotary printing machine at the temperature of 80-105 ℃, and fixing the modulated color toner on the surface of the carrier film to form a modulated color toner image-text layer;
s7: and an auxiliary fixing roller of the digital rotary printing machine performs re-rolling fixation on the color ink powder image-text layer on the carrier film to obtain the high-definition transfer film, wherein the peel strength of the modulated color ink powder image-text layer is 0.03N/25 mm-0.11N/25 mm.
Further, the method can also comprise the following steps:
s8: and for the high-definition transfer film, the digital rotary printing machine is adopted to simultaneously carry out post-printing corona treatment on the modulated color ink powder image-text layer, and the corona value of the modulated color ink powder image-text layer after corona treatment is 38 mN/M-60 mN/M.
Correspondingly, the invention also provides application of the high-definition transfer film without the separating agent layer, the high-definition transfer film is matched with a conventional thermal transfer machine to transfer the modulated colored toner image-text layer to the surface of a printing stock to form firm adhesion, and the adhesion is ISO level 1 to 0 or ASTM 4B-5B; the material of the printing stock comprises one of ABS, AS, PVC, PMMA, HIPS, PET, PU, PC, PS metal, wood and melamine; the surface corona value of the printing stock is more than 38 mN/M; the transfer temperature in the transfer process is 120-180 ℃.
Furthermore, the material of the printing stock also comprises one of PP, PE and glass; when the material of the printing stock is one of PP, PE and glass, the surface of the printing stock is pretreated before transfer printing, and the surface corona value of the printing stock after pretreatment is more than 38 mN/M; the pre-treatment comprises one or more of flame treatment, treatment agent treatment or corona treatment; the transfer temperature in the transfer process is 120-180 ℃.
The invention has the following advantages:
the invention solves the problem that the image-text layer of the conventional transfer printing film can be transparently inspected, is suitable for the problems of the conventional heat transfer printing machines in the market, is suitable for the problems of very wide material printing stocks, has the advantages of omitting printing plates, reducing working procedures, reducing loss, printing according to needs, being fast and efficient, avoids the participation of organic solvents in the whole preparation and application processes, and has a series of purely physical methods, realizes the safety, environmental protection, energy conservation and emission reduction in the real sense, has the image resolution of 1200dpi, improves the printing image quality to a brand-new level, and has epoch-making significance.
Drawings
FIG. 1 is a schematic view of a carrier film structure;
FIG. 2 is a schematic view of a modulated color toner;
FIG. 3 is a schematic view of a digital rotary press based on the principle of LED or laser array toner electrophotography;
FIG. 4 is a schematic illustration of printing a modulated color toner image layer on a carrier film using a digital rotary press;
FIG. 5 is a schematic diagram of a printing unit of a digital rotary press printing on LED or laser array toner electrophotographic printing process;
FIG. 6 is a schematic view of an image fixing process of a digital rotary press;
FIG. 7 is a schematic structural view of a high definition transfer film without a separating agent layer according to the present invention;
FIG. 8 is a schematic view of a thermal transfer application of a high definition transfer film without a separating agent layer according to the present invention;
FIG. 9 is a schematic view of a substrate configuration;
FIG. 10 is a schematic view of the digital rotary press co-operating with the corona treatment of the printed modulated color toner image-text layer;
fig. 11 is a schematic view of substrate flame treatment.
Wherein:
1 is a carrier film;
2 is a modulated color toner with a corona value of 38mN/M to 60 mN/M;
3, completing the preparation of the high-definition transfer printing film without a separating agent layer;
4, a digital rotary press based on LED or laser array ink powder electrophotography principle for one-time imaging;
5, an unwinding device of the digital rotary press;
6 is a winding device of the digital rotary printing machine;
7 is a printing unit of a digital rotary press;
8 is an image fixing unit of the digital rotary press;
9 is a synchronous corona unit of the digital rotary press;
10 is the LED or laser light source of the printing unit;
11 is a light source deflection modulator of the printing unit;
12 is a photoconductor of the printing unit;
14 is a main fixing roller in an image fixing unit of a digital rotary press;
15 is an auxiliary fixing roller in the image fixing unit of the digital rotary press;
16 is a corona machine of a digital rotary press;
17 is static eliminator of digital rotary press;
18 is an unwinding device of a conventional thermal transfer printing machine;
19 is a winding device of a conventional thermal transfer printer;
20 is a heated silica gel roller of a conventional thermal transfer printer;
21 is a printing stock made of ABS;
22 circulating flame treatment production line;
23 is a flame sprayer on a flame treatment line;
24 is a substrate made of PE.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the accompanying drawings.
Example 1
The embodiment of the invention discloses a high-definition transfer film without a separating agent layer, which replaces the separating agent layer by utilizing the corona value difference principle, and the preparation method comprises the following steps:
referring to fig. 1, a transparent biaxially oriented non-corona BOPP film with a thickness of 20 to 50 micrometers and a surface corona value of 30 to 37mN/M or a transparent non-corona PE film with a thickness of 50 to 80 micrometers and a surface corona value of 30 to 37mN/M may be selected as the carrier film. In the present example, a BOPP film with a thickness of 23 μm was used as the carrier film 1. PE and PP are typical nonpolar plastics, under the condition of natural preparation, the surface corona values of the two plastic films are 30 mN/M-34 mN/M, which meets the requirement of material selection, and because the cast type or the calendering type PE film has insufficient tensile strength, the stretching deformation is easy to occur in the printing preparation process or the thermal transfer printing process, the stretching problem can not be well solved by simply increasing the thickness of the PE film, and the increase of the raw material cost and the reduction of the transparent visual degree of the pictures and texts can be correspondingly caused, which belongs to non-preferred selection; the tensile strength index of the biaxially oriented BOPP film completely meets the application requirements of digital printing preparation and thermal transfer printing, wherein 20-30 micrometers is the most suitable thickness range, and 23 micrometers is the most common specification in the market, so that the BOPP film with the specification is the most scientific and reasonable choice.
Referring to fig. 2, a special modulated color toner is used.
Wherein the corona value of the modulated color toner 2 is 38mN/M to 60 mN/M.
The material of the modulated color toner 2 comprises the following components: 45-60% of thermoplastic acrylic resin, 25-35% of chlorinated polypropylene resin, 0-20% of pigment, 0-5% of dye, 0.2-0.8% of magnetic iron oxide and 1.5-3% of dielectric additive.
The modulated color toner 2 includes one or more of CMYK colors, white colors, spot colors, and technical colors.
Wherein the fineness of the ink powder is 4-10 microns.
Referring to fig. 3, a digital rotary printing machine 4 based on LED or laser array toner electrophotographic principle for primary imaging is selected. The two ends of the digital rotary printing machine 4 are provided with an unreeling device 5 and a reeling device 6, and a film passing route of the printing machine sequentially passes through a printing unit 7, an image fixing unit 8 and a synchronous corona unit 9.
The digital rotary printing machine can realize high-definition printing with image resolution being more than or equal to 1200 dpi.
The digital rotary printing machine has the functions of surface printing mode, inner printing mode, full printing mode, local printing mode, printing font reduced to 0.7 pound, variable data image and text printing, and other safety and anti-fake elements.
Editing the customized image-texts in advance according to the requirements of the thermal transfer application, wherein the editing comprises the image-text direction, the transverse and longitudinal spacing between the same repeated drawings or different drawings, the conversion of image-text formats, curve conversion and the like.
Referring to fig. 4, a transparent biaxially oriented non-corona BOPP film with a thickness of 23 microns and a corona value of 30mN/M to 34mN/M is mounted on an unwinding device 5 of the digital rotary printing to serve as a carrier film 1, and the carrier film is guided into a winding device 6 of the printing machine according to a film passing route and sequence of the printing machine and sequentially passes through each printing unit, an image fixing unit, a synchronous corona unit and an electrostatic elimination unit of the printing machine.
A developing device and a dedicated color toner container 13 for each printing unit of the printer; the prepared toner 2 of each color is added, and only one color of the prepared toner can be added to the developing device and the container dedicated to color toner of each printing unit.
And inputting the electronic file of the edited and proper customized image-text into the digital rotary printing machine.
And starting the digital rotary printing machine to implement printing operation, completely finishing the whole printing preparation process at one time, and then obtaining the high-definition transfer printing film 3 which is wound on a winding device 6 of the printing machine.
Wherein: the printing speed of the digital rotary printing machine is reduced along with the increase of the solid area of the inking, and the most conventional printing speed of the local graphics and texts of the transfer film in the back printing mode is about 20M/min in the interval of 70M/min-10M/min.
The high-definition transfer printing film 3 which is prepared by printing has the image resolution ratio of more than or equal to 1200dpi, the overprinting error among all colors of the image is less than or equal to 0.0254mm, the image is wound into a roll, and the diameter of the roll can be flexibly processed according to the rated value of a printing machine and the order.
The high-definition transfer film 3 can be prepared in a surface printing mode or an inner printing mode, can be a local image-text or a comprehensive image-text, or can be a combination of the local image-text and the comprehensive image-text, and can be a micro image-text, a variable data image-text, a safe anti-counterfeiting image-text and the like.
Referring to fig. 5, fig. 5 is a schematic diagram of the principle of the operation of the printing unit of the digital rotary press based on the LED or laser array toner electrophotographic printing process, that is, the detailed description of the printing unit 7 is that the LED or laser light source 10 is used to charge the light conductor 12 of the printing unit to latent image by scanning through the light source deflection modulator 11 according to the standard of the digital rotary press; the charge of the charged toner particles of the modulated color toner 2 is opposite to the charge of the photoconductor charged latent image, and the photoconductor 12 attracts the modulated color toner 2 in the developing device and the toner dedicated container 13 by the coulomb effect between the two charges, so that the latent image is visible to the development.
Wherein, according to the draft electronic document, the development can be independent development, combined development and superposition development of one or more of the colors of the modulated color toners.
In the back printing mode, the color order of each printing unit is generally K color, spot color, C color, M color, Y color, white color, and one, a plurality, or a combination of all of these colors.
In the form printing mode, the color sequence of each printing unit is generally white, Y, M, C, spot, K, and one, a plurality, or a combination of all of these colors.
Wherein, each printing unit only realizes the printing of one color, namely realizes the development of one color from latent image.
When the coverage rate of the monochromatic ink powder is 100%, namely the full-width 100% development, the using amount of the monochromatic ink powder is 3.5 g/square meter to 5.5 g/square meter, the using amount of the ink is large, the ink layer is thick and solid, and the stereoscopic impression is strong.
The density of the CMYK monochromatic solid printing is 1.2-2.4, which greatly exceeds the printing density level of offset printing, intaglio printing, letterpress printing and pad printing.
Referring to fig. 6, fig. 6 is a schematic view of the image fixing process of the digital rotary press, i.e. a detailed description of the image fixing unit 8, the colors of the modulated color toners 2 are transferred to the carrier film 1 regardless of independent development, combined development or superimposed development, at this time, the temperature of the main fixing roller 14 of the image fixing unit 8 on the press is set between 80 ℃ and 105 ℃, the pressure is set between 0.2Mpa and 0.4Mpa, and under the traction of the tension of the unwinding device and the winding device of the press, the toner particles of the modulated color toners 2 transferred on the surface of the carrier film 1 pass through the main fixing roller 14, are rolled, melted and superimposed by the main fixing roller 14 and are fixed on the surface of the carrier film 1, so as to form a modulated color image-text layer.
In order to prevent insufficient fixing and careless fixing, to further improve fixing quality, or to perform technical segmentation fixing, the digital rotary press is specially designed with an auxiliary fixing roller 15. The modulated color toner 2 on the high-definition transfer film fixed by the fixing roller 14 is further rolled and fixed by the auxiliary fixing roller 15, wherein the temperature of the auxiliary fixing roller is set to be 80-95 ℃, and the pressure is set to be 0.3-0.6 Mpa.
In order to prevent the fixing rollers from sticking to the modulated color toner during the process of rolling the modulated color toner, both the fixing rollers 14 and 15 use a heat-resistant anti-sticking material.
The fixing roller 14 was coated with teflon as a steel roller to reinforce the anti-sticking treatment.
Wherein, the auxiliary fixing roller 15 is wrapped by a steel roller and is treated by silicon oil anti-sticking on the surface of the reinforced roller.
Conventionally, the image-text layer formed by the modulated color toner 2, which is superimposed and fixed on the surface of the carrier film 1 by fusing, has a corona value of 38mN/M to 60mN/M, more precisely 40mN/M to 54mN/M, and can be wound into a roll and applied directly without additional corona treatment in principle.
The embodiment of the invention also discloses the high-definition transfer film without the separating agent layer, which is obtained by the preparation method.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a high definition transfer film without a separating agent layer according to the present invention, wherein a modulated color toner 2 is superimposed and fixed on the surface of a carrier film 1 to form an image-text layer, and a high definition transfer film 3 without a separating agent layer is formed by combining, the transfer peel strength is 0.03N/25mm to 0.11N/25mm, and the transfer rate of the modulated color toner image-text layer in all transfer applications is about 100%.
The embodiment of the invention also discloses an application of the high-definition transfer film without the separating agent layer, and as shown in figure 8, the high-definition transfer film 3 without the separating agent layer is matched with a conventional thermal transfer machine to carry out surface thermal transfer application on a plastic product, the high-definition transfer film 3 is loaded on an unreeling device 18 of the conventional thermal transfer machine, and according to a film passing route of the thermal transfer printing machine, the printing material passes by a film guide roller and a silica gel roller 20 and is connected to a winding device 19 of the thermal transfer printing machine, at the moment, under the tension traction action of the unwinding device and the winding device, the transmission driving of the silica gel roller, the pushing of a printing material clamp, the synchronous action of the pressure and the heating of the silica gel roller and the like, an image-text layer formed by the modulated colored ink powder 2 is separated from the high-definition transfer printing film 3 and is transferred and solidified to a bearing surface of the printing material 21, so that a transfer printing process is completed, and the printing material 21 printed with the customized image-text is obtained.
Wherein: the printing stock is made of ABS plastic.
Wherein: the hardness of the silica gel roller 20 of the conventional thermal transfer printer is 50-85 degrees of Shore O type, the surface temperature is 120-180 degrees, the pressurizing air cylinder pressurizes 0.5-0.8 MPa, and the transfer printing speed of the transfer printer is 4-8M/min.
Fig. 9 is a schematic structural diagram of the printing material of the embodiment, in which 21 is the printing material made of ABS, and 2 is the modulated color toner image-text layer that has been cured on the surface of the printing material.
The adhesion force between the graphic layer formed by the modulated color toner 2 and the printing stock 21 can reach ISO:0(ASTM: 5B).
The printing stock can also be AS, PS, PC, PU, PET, PVC, PMMA, HIPS, wood, metal, melamine and the like, the corona value of the printing surface is more than 38mN/M, the transfer printing temperature is 120-180 ℃, and the adhesive force is ISO grade 1 to 0 grade (ASTM 4B-5B).
Example 2
A high definition transfer film without a separating agent layer was prepared by the method of example 1, specifically, by the description of fig. 1 to 7. In this embodiment, the high-definition transfer film is subjected to post-press common corona treatment.
Referring to fig. 10, fig. 10 is a schematic diagram of the digital rotary printing machine for the co-machine synchronous corona treatment of the post-printing modulated color toner image-text layer, that is, a detailed description of the synchronous corona unit 9, in order to improve the degree of guarantee and adapt to a wider range or other uses, the digital rotary printing machine is specially designed with the synchronous corona unit 9, which includes a corona machine 16 and a static eliminator 17, and the surface of the image-text layer formed by the modulated color toner 2 can be selectively subjected to the synchronous corona treatment before the transfer film 3 enters the winding process according to needs, so that the image-text layer is further polarized.
Wherein: the electrode discharge alternating current voltage of the corona processor 16 is 10000V-15000V, the high frequency is 15 KHZ-25 KHZ, and the electrode discharge distance is 1 mm-3 mm.
Wherein: the electrode discharge voltage of the static eliminator 17 is 5000V-6000V, the air pressure of the ion air gun is 0.3 Mpa-0.6 Mpa, and the air consumption is 300 Ni/min-550 Ni/min.
The corona value of the modulated toner image-text layer 2 after corona treatment and static elimination is 38mN/M to 60mN/M, and is more accurate to be 42mN/M to 56 mN/M. Corona completed transfer sheet 3 may be wound into a roll and applied.
The corona treatment is only to polarize the toner image layer of the transfer film further, and no structural difference is brought, so the structural schematic diagram is shown in fig. 7.
The embodiment of the invention also discloses the high-definition transfer film without the separating agent layer, which is obtained by the preparation method.
The embodiment of the invention also discloses application of the high-definition transfer printing film without the separating agent layer, wherein the printing stock selected in the embodiment is made of a thermoplastic PE material, and the printing stock is subjected to flame treatment.
Referring to fig. 11, a printing stock 24 is placed on a station of a circulating flame treatment production line 22, the printing stock is driven by a production line conveyor belt to be close to a production line flame ejector 23, the flame ejector 23 burns gas with certain composition and proportion to form oxidation flame with the temperature of 1000-1600 ℃, the surface of the moving and close printing stock 24 is covered, and the distance between a nozzle of the flame ejector and the printing stock 24 is about 20 cm.
The corona value of the surface of the flame-treated printing stock 24 is more than or equal to 47 mN/M.
In the application of thermal transfer printing to the transfer printing film of this embodiment, referring to fig. 9, the surface of the flame-treated substrate 24 is thermally transferred, and the transfer printing process parameters refer to embodiment 1, so as to obtain the substrate 24 printed with the customized graphics and texts.
Referring to fig. 10, fig. 10 is a schematic structural diagram of the printing material of the present embodiment, where 24 is the printing material made of PE, and 2 is the modulated color toner image-text layer solidified on the surface of the printing material.
Wherein, the adhesion force between the graphic layer formed by the modulated color toner 2 and the printing material 24 is ISO grade 1 to 0 grade (ASTM 4B-5B).
The printing material of the embodiment can also be PP, glass and the like.
Example 3
Referring to fig. 1 to 10, the present example discloses a preparation and application of a high definition transfer film without a separating agent layer, the steps are the same as those of the examples 1 and 2 of the present invention, and the difference is that the carrier film 1 is a transparent biaxially oriented non-corona BOPP film with a 20 micron surface corona value of 30mN/M to 37mN/M, the modulated color toner 2 is a black single color, the coverage rate of the toner is 100%, namely when the full-width 100% development is performed, the usage amount of the single color toner is 3.5 g/square meter to 5.5 g/square meter, the usage amount of the single color toner is large, and the ink layer is thick.
The prepared transfer printing film with thick ink layer and strong weather resistance can be used as a heat transfer printing carbon ribbon or replace a conventional heat transfer printing carbon ribbon, the adhesive force between an image-text layer formed by modulating the colored ink powder 2 after the transfer printing application and a printing stock can reach ISO level 1 to 0 level (ASTM 4B-5B), the image resolution is not less than 1200dpi, the pattern stereoscopic impression is strong, and the advantages are outstanding.
Example 4
Referring to fig. 1 to 10, this example discloses a preparation and application of a high definition transfer film without a separating agent layer, which has the same steps as those of the embodiments 1 and 2 of the present invention, except that the carrier film is a transparent biaxially oriented non-corona BOPP film with a thickness of 50 micrometers and a surface corona value of 30mN/M to 37mN/M, the modulated color toner 2 is CMYK color, no white background is provided, and the density of the CMYK monochrome solid printing is 1.2 to 2.4, specifically: c1.6-1.9, M1.45-1.8, Y1.2-1.5, K2.0-2.4, which greatly exceed the printing density level of flat printing, intaglio printing, letterpress printing and pad printing.
The high-definition transfer film with thick ink layer is prepared, the adhesive force between the image-text layer formed by modulating the color toner 2 after application and the printing stock can reach ISO level 1 to 0 level (ASTM 4B-5B), the resolution of the printed image-text image can reach astonishing definition of 1200dpi, and the high-definition transfer film is exquisite and absolute.
Example 5
Referring to fig. 1 to 10, the present example discloses the preparation and application of a high definition transfer film without a separating agent layer, which has the same steps as those of the present invention in examples 1 and 2, except that the carrier film is a transparent non-corona PE film having a thickness of 50 μ M and a surface corona value of 30mN/M to 37 mN/M.
The prepared high-definition transfer film is thick in ink layer, strong in stereoscopic impression and high in weather resistance, the adhesive force between an image-text layer formed by modulating the color ink powder 2 and a printing stock can reach ISO level 1 to 0 level (ASTM 4B-5B), the resolution of a printed image-text image can reach astonishing definition of 1200dpi, and the high-definition transfer film is exquisite and extremely elegant.
Example 6
Referring to fig. 1 to 10, the present example discloses the preparation and application of a high definition transfer film without a separating agent layer, which has the same steps as those of the present invention in examples 1 and 2, except that the carrier film is a transparent non-corona PE film with a thickness of 80 μ M and a surface corona value of 30mN/M to 37 mN/M.
The prepared high-definition transfer film is thick in ink layer, strong in stereoscopic impression and high in weather resistance, the adhesive force between an image-text layer formed by modulating the color ink powder 2 and a printing stock can reach ISO level 1 to 0 level (ASTM 4B-5B), the resolution of a printed image-text image can reach astonishing definition of 1200dpi, and the high-definition transfer film is exquisite and extremely elegant.
Comparative example 1
Referring to fig. 1 to 10, this example discloses preparation and application of a transfer film, a carrier film 1 is a PET film, and the rest of materials and steps are the same as those in embodiments 1 and 2 of the present invention.
At the moment, the corona value of the printing surface of the PET film is too high to reach 44-50 mN/M, and cannot be controlled within the range of 30-37 mN/M, so that the color ink powder image-text layer 2 of the prepared transfer film is tightly attached to the PET film and cannot be peeled off, and the peeling strength of 0.03N/25 mm-0.11N/25 mm cannot be reached, and the transfer film cannot be used.
Comparative example 2
Referring to fig. 1 to 10, this example discloses preparation and application of a transfer film, a carrier film 1 is a PVC film, and the rest of the materials and steps are the same as those in embodiments 1 and 2 of the present invention.
At the moment, because the corona value of the printing surface of the PVC film is too high and reaches 44mN/M or more, and the temperature resistance of the PVC film is poor, irregular deformation occurs by heating and rolling of a main fixing roller and an auxiliary fixing roller of a printing machine in the printing process, a color toner image-text layer attached to the PVC film is deformed or distorted along with the deformation, the color toner image-text layer cannot be controlled within the range of 30 mN/M-37 mN/M, the prepared transfer film cannot be peeled off or conform to the normal state of a draft, and the transfer film cannot be used.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is defined by the appended claims.
Claims (9)
1. A high-definition transfer printing film without a separating agent layer is characterized by comprising a carrier film, a modulated color ink powder image-text layer and a high-definition transfer printing film prepared by a digital rotary printing machine, wherein the peel strength is 0.03N/25 mm-0.11N/25 mm; the carrier film is a transparent nonpolar plastic film, and the corona value of the printing surface of the carrier film is 30 mN/M-37 mN/M; the corona value of the modulated color ink powder image-text layer is 38 mN/M-60 mN/M, and the modulated color ink powder image-text layer comprises the following components: 45-60% of thermoplastic acrylic resin, 25-35% of chlorinated polypropylene resin, 0-20% of pigment, 0-5% of dye, 0.2-0.8% of magnetic iron oxide and 1.5-3% of dielectric additive; the fineness of the ink powder of the modulated color ink powder image-text layer is 4-10 micrometers; the digital rotary printing machine is used for primary imaging based on an LED or laser array powdered ink electrophotography principle, the modulated color powdered ink image-text layer is heated, pressurized, melted, superposed and fixed on the surface of the carrier film, and the fixing temperature is 80-105 ℃; the image overprinting error of the image-text layer of the modulated color ink powder is less than or equal to +/-0.0254 mm; the image resolution of the high-definition transfer printing film is more than or equal to 1200 dpi.
2. The high definition transfer film without a separating agent layer according to claim 1, wherein the digital rotary press can simultaneously perform post-printing corona treatment on the modulated color toner image-text layer, and the corona value of the modulated color toner image-text layer after corona treatment is 38mN/M to 60 mN/M.
3. The high definition transfer film without a separating agent layer according to claim 1, wherein the modulated color toner image-text layer comprises one or more of CMYK colors, white, spot colors, technical colors; when the coverage rate of the modulated color toner image-text layer is 100 percent of the coverage rate of the monochromatic toner, the using amount of the monochromatic toner is 3.5 g/square meter to 5.5 g/square meter; the density of single-color solid printing of CMYK colors is 1.2-2.4.
4. The high-definition transfer film without the separating agent layer according to claim 1, which is prepared by a digital rotary press and can be prepared into one or more of surface printing mode pictures and texts, inner printing mode pictures and texts, local pictures and texts, comprehensive pictures and texts, micro pictures and texts, variable data pictures and texts and safety anti-counterfeiting element pictures and texts.
5. A high definition transfer film according to claim 1, wherein the transparent nonpolar plastic film is a BOPP film or a PE film; the BOPP film is a transparent biaxially oriented non-corona film, and the thickness of the BOPP film is 20-50 micrometers; the PE film is a transparent non-corona film, and the thickness of the PE film is 50-80 micrometers.
6. The production of a high definition transfer film without a separating agent layer according to claim 1, comprising the steps of:
s1: selecting a BOPP film or a PE film as a carrier film, wherein the corona value of the BOPP film or the PE film is 30-37 mN/M;
s2: the corona value is 38 mN/M-60 mN/M, and the material comprises the following components: 45-60% of thermoplastic acrylic resin, 25-35% of chlorinated polypropylene resin, 0-20% of pigment, 0-5% of dye, 0.2-0.8% of magnetic ferric oxide and 1.5-3% of dielectric additive;
s3: the modulated color toner comprises one or more of CMYK color, white color, spot color and technical color, and the fineness of the toner is 4-10 micrometers;
s4: determining the pattern of the image and text, including one or more of table printing pattern image and text, inner printing pattern image and text, local image and text, comprehensive image and text, micro image and text, variable data image and text and safe anti-counterfeiting element image and text;
s5: the digital rotary printing machine based on LED or laser array powdered ink electrophotography principle one-time imaging is adopted to be matched with the color powdered ink for modulation, and the printing is carried out on the image and the text, the image resolution of the image and the text is more than or equal to 1200dpi, the overprinting error of the image and the text is less than or equal to +/-0.0254 mm, the CMYK color solid-color printing density is 1.2-2.4, the coverage rate of the monochromatic powdered ink is 100%, and the using amount of the monochromatic powdered ink is 3.5 g/square meter to 5.5 g/square meter;
s6: heating, pressurizing, melting and superposing the modulated color toner by a main fixing roller of the digital rotary printing machine at the temperature of 80-105 ℃, and fixing the modulated color toner on the surface of the carrier film to form a modulated color toner image-text layer;
s7: and an auxiliary fixing roller of the digital rotary printing machine performs re-rolling fixation on the color ink powder image-text layer on the carrier film to obtain the high-definition transfer film, wherein the peel strength of the modulated color ink powder image-text layer is 0.03N/25 mm-0.11N/25 mm.
7. The process for producing a high definition transfer film without a separating agent layer according to claim 6, further comprising the steps of:
s8: and for the high-definition transfer film, the digital rotary printing machine is adopted to simultaneously carry out post-printing corona treatment on the modulated color ink powder image-text layer, and the corona value of the modulated color ink powder image-text layer after corona treatment is 38 mN/M-60 mN/M.
8. The application of the high-definition transfer film without the separating agent layer according to claim 1 is characterized in that the high-definition transfer film is matched with a conventional thermal transfer machine to transfer the modulated colored toner image-text layer to the surface of a printing stock to form firm adhesion, and the adhesion force is ISO 1 grade to 0 grade or ASTM 4B-5B; the material of the printing stock comprises one of ABS, AS, PVC, PMMA, HIPS, PET, PU, PC, PS, metal, wood and melamine; the surface corona value of the printing stock is more than 38 mN/M; the transfer temperature in the transfer process is 120-180 ℃.
9. The use of a high definition transfer film without a separating agent layer according to claim 8, wherein the material of the printing material further comprises one of PP, PE, glass; when the material of the printing stock is one of PP, PE and glass, the surface of the printing stock is pretreated before transfer printing, and the surface corona value of the printing stock after pretreatment is more than 38 mN/M; the pre-treatment comprises one or more of flame treatment, treatment agent treatment or corona treatment; the transfer temperature in the transfer process is 120-180 ℃.
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