CN113799509B - Shadow-wood effect heat transfer film with optical structure and preparation method thereof - Google Patents

Shadow-wood effect heat transfer film with optical structure and preparation method thereof Download PDF

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CN113799509B
CN113799509B CN202111096661.5A CN202111096661A CN113799509B CN 113799509 B CN113799509 B CN 113799509B CN 202111096661 A CN202111096661 A CN 202111096661A CN 113799509 B CN113799509 B CN 113799509B
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layer
shadow
optical structure
wood
optical
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CN113799509A (en
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肖俊凌
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Foshan Boluo Decoration Material Co ltd
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Foshan Boluo Decoration Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/24—Inking and printing with a printer's forme combined with embossing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44F—SPECIAL DESIGNS OR PICTURES
    • B44F9/00—Designs imitating natural patterns
    • B44F9/02—Designs imitating natural patterns wood grain effects
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/004—Reflecting paints; Signal paints
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J167/00—Adhesives based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Adhesives based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide

Abstract

The invention provides a shadow-wood effect heat transfer film with an optical structure and a preparation method thereof, wherein the preparation method comprises the following steps: preparing a first shadow wood optical roller and a second shadow wood optical roller by a shadow taking technology, wherein the first shadow wood optical roller and the second shadow wood optical roller can be patterned; providing a bottom film, coating a first structural adhesive on the bottom film, and utilizing a first shadow optical roller to enable the first structural adhesive to generate shadow patterns to form a first optical structure layer; sequentially stacking a composite light reverse release layer and a printing color layer on the first optical structure layer, coating a second structural adhesive on the printing color layer, and enabling the second structural adhesive to generate shading by using a second shading optical roller to form a second optical structure layer; coating or compounding the second optical structure layer to form a light reflecting layer; and printing a cover bottom color layer on one side of the light reflection layer, which is far away from the second optical structure layer, coating an adhesive layer on the cover bottom color layer, and finally rolling to obtain the shadow wood effect heat transfer film. Compared with the prior art, the preparation method and the prepared shadow wood effect heat transfer film have the advantages that the wood grain is obviously dynamic, the fidelity is high, and the environment is protected.

Description

Shadow-wood effect heat transfer film with optical structure and preparation method thereof
Technical Field
The invention relates to the technical field of heat transfer films, in particular to a shadow-wood effect heat transfer film with an optical structure and a preparation method thereof.
Background
Rare wood is rich in shading, but is an exhausted resource, so that a heat transfer film which is more weather-resistant and durable and has shading needs to be provided to meet the requirements of people. With the popularization of the application of the wood-like materials and the aesthetic pursuit of people on precious wood, people hope that the wood-like materials are closer to natural luster, the shadow patterns are vivid and weather-proof and durable, and particularly, the luster of the shadow patterns is more prominent, so that the wood-like materials are a favorite choice of people. The shadow wood has luster, the radial panel has deep and shallow banded patterns and variable banded luster, has golden wires and tiger skin patterns like golden silkwood, presents the colors of the traditional landscape painting and ink-wash painting of China, and has stronger stereoscopic impression of straight lines.
In the related technology, the thermal transfer paper or film prepared by the method for preparing the thermal transfer paper or film with the floating shadow wood grains in the patent number ZL 201810716300.8 has very good handfeel, but the shadow grains only achieve the floating shadow effect, and the high-order requirements are required to be improved in many aspects. The partial matte transfer film with the notice number CN105882189B and the transfer film with the concave-convex effect and the preparation method thereof with the notice number CN105620071B can only solve the shadow effect on some visual angles, and have larger difference with the color, shadow and grain nesting position of real shadow wood, such as precious golden silk nanmu, which is not a simple floating grain, but an optical concave-convex grain of the whole page. In addition, in the prior art, if the transfer film is coated with a layer of gloss oil, the concave-convex texture generated before the removal of the gloss oil can appear.
Therefore, there is a need to provide a new shadow-wood effect thermal transfer film with an optical structure and a method for preparing the same to solve the above problems.
Disclosure of Invention
The invention aims to provide a shadow-wood effect heat transfer film with an optical structure, which has obvious wood grain dynamic sense, high fidelity and environmental protection, and a preparation method thereof.
In order to solve the technical problems, the invention provides a preparation method of a shadow-wood effect heat transfer film with an optical structure, which is used for finishing the coating of the patterns, shadows, colors, release, light reflection and adhesive coatings of a film material on a production machine shaft so as to ensure that the patterns, the shadows and the patterns can be effectively aligned, and comprises the following steps:
s1, preparing two shadow wood optical rollers by a shadow taking technology, wherein the two shadow wood optical rollers comprise a first shadow wood optical roller and a second shadow wood optical roller, and the first shadow wood optical roller and the second shadow wood optical roller can be patterned in a sleeving manner.
And S2, providing a base film, coating a first structural adhesive on the base film, and utilizing the first shadow woodwork optical roller to generate shadow patterns on the first structural adhesive in a mould pressing or printing mode so as to form a first optical structure layer.
And S3, sequentially overlapping a composite light reflection release layer and a printing color layer on one side of the first optical structure layer, which is far away from the base film, coating a second structure adhesive on one side of the printing color layer, which is far away from the light reflection release layer, and enabling the second structure adhesive to generate shading by utilizing a second shading optical roller through a mould pressing or printing mode so as to form a second optical structure layer.
And S4, coating or compounding the second optical structure layer on one side far away from the printing color layer to form a light reflecting layer.
And S5, printing a cover bottom color layer on one side of the light reflection layer far away from the second optical structure layer, coating an adhesive layer on one side of the cover bottom color layer far away from the light reflection layer, and finally rolling to obtain the shadow wood effect heat transfer film.
Preferably, the manufacturing of the shadow wood optical roller specifically comprises the processes of shadow taking, algorithm, carving and surface treatment;
the image taking comprises any one of direct wood grain complex grain image taking, laser beam image taking, physical contact image taking and light scanning image taking;
the algorithm is to generate a dxf or dwg format file by utilizing a preset algorithm operation after the file is obtained through the image taking process;
and the engraving is to engrave the steel roller or the copper-plated steel roller according to the format file.
Preferably, when the first optical structure layer and the second optical structure layer are both manufactured by using the same molding press in a mold pressing manner, the molding press is a separate thermoforming molding press or a UV molding press; the thickness of the first optical structure layer is 5-50 μm, and the thickness of the second optical structure layer is 5-50 μm.
Preferably, the first optical structure layer and the second optical structure layer are both pressed by a UV pressing manner through a UV pressing machine and then are pressed by 600mw/cm 2 And respectively obtaining the first optical structure layer and the second optical structure layer after curing by using an ultraviolet mercury lamp.
Preferably, the first structural adhesive is a high solid content adhesive, and comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; s37, 1 to 5 percent of release slipping agent; 20-60% of ester ketone mixed solvent; the second structural adhesive is high solid content adhesive and comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; 20-60% of ester ketone mixed solvent; alternatively, the first and second electrodes may be,
the first structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1-5% of photoinitiator; s37, 1 to 5 percent of release slipping agent; monomer UV diluent, 10-50%; the second structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1 to 5 percent of photoinitiator; monomer UV diluent, 10-50%; alternatively, the first and second electrodes may be,
the first structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; s37, 1 to 5 percent of release slipping agent; 10-50% of monomer UV diluent; the second structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; 10-50% of monomer UV diluent.
Preferably, the light reflecting release layer is made of a UV coating and consists of the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; TPO photoinitiator, 1-5%; monomer UV diluent, 10-50%; BH114 pearlescent pigment 5%; the thickness of the light reflecting release layer is 5-50 mu m.
Preferably, the printing color layer is used for providing a wood grain color, and the printing color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-bearing polyester resin; 10 to 25 percent of pigment; 20-60% of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%; the printing color layer is printed by gravure, the plate making of gravure is 60-120 lines/cm, the depth of plate making of printing is 45 mu m, the printing color layer is composed of a plurality of printing colors, and the thickness of the coating is 5-20 mu m.
Preferably, the light reflecting layer is made of an oil paint and is formed by coating in a 50-line/cm anilox roll gravure coating mode, the thickness of the light reflecting layer is 5-50 μm, and the light reflecting layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; 20-60% of ester ketone mixed solvent; BH114 nacreous pigment, 5%.
Preferably, the cover bottom color layer is used for covering the cover bottom, and the cover bottom color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 25 to 35 percent of titanium dioxide; 20-60% of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%; the cover bottom color layer is printed by gravure, the gravure plate making is 60-70 lines/cm, the printing plate making depth is 45 mu m, and the coating thickness is 5-20 mu m.
Preferably, the adhesive layer is made of polyurethane hot melt adhesive, the adhesive layer is printed by gravure, the gravure plate making is 60-120 lines/cm, the printing plate making depth is 45 mu m, and the thickness of the coating is 5-20 mu m.
The invention also provides a shadow-wood effect heat transfer film with an optical structure, which comprises a bottom film, a first optical structure layer, a light reflecting release layer, a printing color layer, a second optical structure layer, a light reflecting layer, a cover bottom color layer and an adhesive layer which are sequentially laminated, wherein the shadow-wood transfer film with the optical structure is prepared by the preparation method of the shadow-wood effect heat transfer film with the optical structure.
Compared with the prior art, the method for preparing the shadow wood effect heat transfer film with the optical structure and the shadow wood transfer film prepared by the method can transfer the texture and the color of the shadow wood to a workpiece only by a hot pressing mode, the workpiece can achieve an ideal attachment effect after the basement film is torn off, the shadow wood texture is clear and accurate, and the layers are obvious; after the innovative post-curing coating is inserted and the finished product is transferred, the UV lamp is irradiated, so that the surface hardness of the workpiece can be greatly improved. The shadow wood transfer film prepared by the method has obvious dynamic film shadow wood grains, obvious hand feeling grains, high apparent simulation degree, excellent processing performance, capability of reducing consumption of wood resources and good environmental protection effect.
Drawings
FIG. 1 is a block flow diagram of a method for manufacturing a shadow-wood effect thermal transfer film with an optical structure according to the present invention;
FIG. 2 is a schematic structural view of a shadow-wood effect thermal transfer film with an optical structure according to the present invention;
fig. 3 is a schematic diagram of an effect structure of the thermal transfer film with optical structure after transfer printing.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
Referring to fig. 1, the invention provides a method for preparing a shadow-wood effect heat transfer film with an optical structure, which comprises a base film, a first optical structure layer, a light reflecting release layer, a printing color layer, a second optical structure layer, a light reflecting layer, a base covering color layer and an adhesive layer which are sequentially laminated. As shown in fig. 2, the method comprises the steps of:
s1, preparing two shadow wood optical rollers by a shadow taking technology, wherein the two shadow wood optical rollers comprise a first shadow wood optical roller and a second shadow wood optical roller, and the first shadow wood optical roller and the second shadow wood optical roller can be patterned in a sleeving manner.
In the step, the manufacturing of the shadow wood optical roller specifically comprises the procedures of shadow taking, algorithm, carving and surface treatment.
The shadow taking technology refers to a technology for taking shadows of real wood, shadow wood series wood comprises maple shadows, golden silk nanmu, sapelli and the like, all of which have one characteristic and have obvious shadow stripes, and the definition of shadow wood is as follows: the gloss was observed to be sloshing according to the wood grain depending on the angle of the observer. It has been found that this shine is actually a reflection effect caused by the arrangement of cells in the wood, such as the chips planed from maple wood, which are typically 0.3-5mm thick, and because of the evaporation of moisture, the planed chips shrink along some grains, forming waves, and cooperate with the shine of the cellular fluids, cell walls, and fibers in the wood, thereby forming the patterns. For example, when the plane is transversely cut, the golden silk phoebe does not shrink to form a wave shape, but the golden silk phoebe forms microscopic wave fluctuation along with the growth of cells. If the texture parameters are obtained by using the tool, the related texture and shading can be obtained, and this technology is the shading technology.
The image taking comprises any one of direct wood grain complex grain image taking, laser beam image taking, physical contact image taking and light scanning image taking. In the present embodiment, laser beam projection is preferable after the experiment, but of course, other projection methods as described above are also possible.
The laser beam imaging is that on a very stable platform, a laser beam is erected, the laser beam is shot to a target imaging veneer by taking <5 mu m as one step, the distance is determined by calculating the time after reflection, and the imaging is successfully performed by utilizing the principle that a plurality of points form a line and the line forms a surface. For example, a BMR2000 laser scanner produced by the intelligent technology ltd of pt mince, mountain, may be selected to obtain a texture map of 2000 ten thousand pixels, and a three-dimensional map may be finally constructed.
And the algorithm is to generate a dxf or dwg format file by utilizing a preset algorithm operation after the file is obtained through the image taking process.
And the engraving is to engrave the steel roller or the copper-plated steel roller according to the format file.
For example, the steel roller or the copper-plated steel roller is carved by laser carving or direct carving, and finally the first shadow wood optical roller and the second shadow wood optical roller are obtained after the surface treatment is carried out on the roller.
And S2, providing a base film, coating a first structural adhesive on the base film, and utilizing the first shadow woodwork optical roller to generate shadow patterns on the first structural adhesive in a mould pressing or printing mode so as to form a first optical structure layer.
The bottom film provides a base for printing materials, all materials are printed on the bottom film, the bottom film can be any film capable of printing a coating, such as PET, CPP, OPP, PC and the like, the thickness of the bottom film is 12-100 mu m, and the surface of the bottom film has good adhesion to the coating. In this embodiment, PET is used specifically, and preferably DuPont 30 μm PET is used, and the surface tension thereof is 52 dyne.
When the film is prepared, a first structural adhesive is coated on a bottom film, the structural adhesive generates shading through a mould pressing or printing method, a first optical structural layer is formed, the first optical structural layer is formed by utilizing a first shadowy wood optical roller to carry out mould pressing or printing forming on the first structural adhesive, the shading is generated, wherein the mould pressing is to utilize mould pressing to produce textures on a coating on a film material, and the printing forming is to directly arrange the first shadowy wood optical roller on the optical structural roller, scrape off a large amount of coatings through a scraper, and transfer-print the coatings on the film, so that the shading is generated.
The molding is generally performed by using a molding press which is divided into a thermoforming molding and a UV molding module, wherein the UV molding module is preferred in the embodiment, the UV molding module means that the film is coated with the first structural adhesive, the molding is performed by using the first shadow optical roller, and the UV curing is simultaneously realized, and after the film leaves the first shadow optical roller, the texture is cured on the film. In this embodiment, UV mould pressing module selects for use the UV100 mould pressing module of platinum Ming Rui intelligent technology ltd of Foshan city, and this module uses British Parma company PM2839 UV mercury lamp pipe as the ultraviolet curing light source, can effectively let the structural adhesive solidification. The input power of the UV100 mould pressing module is 20KW and can provide 600mw/cm 2 Ultraviolet curing energy, and maximum stamping speed of 120 m/min. The embossing die set is placed in a first color bank of the entire printer. In this embodiment, the first optical structure layer is a coating having a thickness of 5 to 50 μm, preferably 10 μm, and the effect is accomplished using a UV molding process.
The UV light curing lamp is a light source capable of providing ultraviolet light and achieving light curing, and includes a mercury lamp, an LED lamp, and other lamps capable of providing an ultraviolet light source, and in this embodiment, 600mw/cm is preferably selected 2 Ultraviolet mercury lamps.
The first structural adhesive must have many factors such as flexibility, releasability, adhesiveness, heat resistance, fullness, and three-dimensional property, and wrinkles may occur during production and transfer, so that the first structural adhesive must have flexibility. The first structural adhesive mainly forms a pattern and a front shadow, and mainly functions as a mold, so that it must be attached to a base film and must have good adhesiveness. Since the light reflecting release layer is released from the back surface, the light reflecting release layer must have releasability. Since the application may be thermal transfer, heat resistance is required. The shadow pattern needs to be dynamic and three-dimensional, so that the shadow pattern needs to have fullness and three-dimensional property. Tests show that the following formulas are prepared, the preparation method is mainly suitable for different production configurations, the process is not limited, and a producer can more easily operate the preparation method, and specifically:
the first structural adhesive is a high solid content adhesive and comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; s37, 1 to 5 percent of release slipping agent; 20-60% of ester ketone mixed solvent. Specifically, 40-60% of poly-head D240 hydroxyl polyester resin; corsaint curing agent 3390,1-20%; jin Meirui S37 release slipping agent, 1-5%; 20 to 60 percent of ester ketone mixed solvent.
The first structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1-5% of photoinitiator; s37, 1 to 5 percent of release slipping agent; monomer UV diluent, 10-50%. Specifically, 30-40% of EB264 aliphatic polyurethane acrylate UV resin; EB745 acrylic acid esterified acrylate UV resin, 10-20%; 1-5% of photoinitiator; jin Meirui S37 release slipping agent, 1-5%; 10-50% of HDDA monomer UV diluent.
The first structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; s37, 1 to 5 percent of release slipping agent; 10-50% of monomer UV diluent. Specifically, 50-80% of Crylic RA 646H emulsion in Kaimes chemical industry and 1-5% of aqueous curing agent SY-716 of Dongguan Si Yu environmental protection technology Limited company; jin Meirui S37 release slipping agent 1-5%; 10-50% of HDDA monomer UV diluent.
And S3, sequentially overlapping a composite light reflecting release layer and a printing color layer on one side of the first optical structure layer, which is far away from the base film, coating a second structure adhesive on one side of the printing color layer, which is far away from the light reflecting release layer, and enabling the second structure adhesive to generate shading by utilizing a second shadow optical roller in a mould pressing or printing mode so as to form a second optical structure layer.
The light reflecting release layer has the release function and must have the functions of softness, heat resistance, weather resistance, solvent resistance, scratch resistance, recoatability and light reflection. Wrinkles may be present during the production and transfer processes, so the light reflective release layer must be flexible. The light reflecting release layer mainly forms mutually opposite lines and front shadows with the first structural adhesive, so that the light reflecting release layer has to have good release property. Since the light reflecting release layer is released from the back surface, the light reflecting release layer must have releasability. The application can be thermal transfer printing, so the heat resistance is required, and the heat resistance temperature is 220 ℃ for 30 minutes. The coating composition should have weather resistance, solvent resistance, scratch resistance, and recoatability in consideration of the requirements for use. Considering that the use can be protected by adding gloss oil, the principle of light reflection in introduction must be provided, and the light reflection refers to the effect of light reflection, so that two transparent coatings are blocked, but the comprehensive performance is not influenced.
Through tests, the following formulas are prepared, the preparation method is mainly suitable for different production configurations, the process is not limited, and a producer can operate more easily, and specifically:
the light reflecting release layer can be made of one of UV paint, water-based paint and oil-based paint, in the embodiment, the light reflecting release layer is preferably made of the UV paint and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; TPO photoinitiator, 1-5%; monomer UV diluent, 10-50%; BH114 pearlescent pigment 5%. Specifically, the method comprises the following steps: 30-40% of Cyanote EB264 aliphatic polyurethane acrylate UV resin, 10-20% of Cyanote EB745 acrylated acrylate UV resin; 1-5% of Pasteur TPO photoinitiator; 10-50% of HDDA monomer UV diluent of Cyanote company; 5363 and 5% of BH114 nacreous pigment of Jin Meirui. It should be noted that the pearlescent pigment includes pearlescent slurry and pearlescent powder.
Wherein the resin part mainly provides a wear-resistant, easy-to-release and high-hardness coating, and the BH114 pearlescent pigment can provide a transparent metallic silver effect and plays a role in light reaction. The coating is coated by using a mesh roller, the mesh roller is coated by using a 50-line/cm mesh roller micro-gravure coating mode, the thickness of the coating is 5-50 mu m, the preferred thickness is 12 mu m, the coating just uses the first optical structure layer as a mould to generate texture on the coating, and simultaneously, the unevenness generated by the first optical structure layer can be filled and leveled, so that the printing is smoother. A thickness of 12 um, which is 10 um just covering the first optical structure layer, is preferably used.
It should be noted that the pigment inks that provide strong metallic silver effects and that act as light counteractions are equivalent features of the BH114 pearlescent pigments of the present invention, and include: metallic pigments, pearlescent pigments, photonic pigments, coatings, and the like, preferably Jin Meirui BH114 pearlescent pigment, which provides a transparent metallic silver effect, acting as a transparent light reaction.
The printing color layer provides wood grain color, the printing color layer is used for manufacturing a printing plate according to the wood grain color, the color effect of the wood grain is printed on the film, the color layer mainly takes resin with good flexibility as a base material, pigment and auxiliary agent are added, and the functional layer has the characteristics of heat resistance, weather resistance, light resistance, recoatability and the like.
The printing color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 10 to 25 percent of pigment; 20-60% of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%. Specifically, 40-60% of poly-head D170 hydroxyl polyester resin; 10 to 25 percent of corresponding pigment; 20 to 60 percent of ester ketone mixed solvent; 1% of digao TEGO760W wetting dispersant pigment wetting agent; the pigment of the coloring material used specifically here is mainly an organic pigment of class 7 or 8 or an inorganic pigment, and mainly achieves excellent heat resistance, weather resistance and light resistance. The D170 hydroxyl-bearing polyester resin has good recoatability and is convenient for overprinting of the ink. In special cases, functional pigments can be used for the functional layer, including foaming pigments, effect pigments, fragrance temperature-change functional pigments, and the like.
The printing is made up of 1-8 plates, and the color and functional ink are finished by intaglio overprinting. The resins and pigments selected for the printing color layer are not limited to the resins and pigments described above, and can be various types of resins and pigments, including urethane resins, UV-based resins, aqueous resins, and the like.
The printing color layer is printed by gravure printing, the gravure plate thickness is 60-120 lines/cm, the plate depth is 45 μm, and the printing color layer is composed of multiple printing colors, and the coating thickness is 5-20 μm, preferably 7 μm.
The second optical structure layer is formed in the same manner as the first optical structure layer:
and the second optical structure layer is formed by compression molding or printing the second structure adhesive by using a second shadow optical roller to generate shadow patterns, wherein the compression molding refers to that the coating on the film material is subjected to compression molding to produce the texture, and the printing molding refers to that the optical structure roller is directly arranged on the second shadow optical roller, and after a scraper scrapes off much coating, the coating is transferred onto the film to generate the shadow patterns. Compression molding generally utilizes a molding press, which is divided into a thermoforming molding press and a UV molding press, preferably a UV molding die set, wherein the UV molding die set is used for coating the film with the second structural adhesive, the second shadow optical roller is used for molding, and simultaneously UV curing is realized, and after the film leaves the second shadow optical roller, the texture is cured on the film. Select for use UV mould pressing module to select UV100 mould pressing module of platinum Ming Rui intelligent technology ltd of Foshan city among this embodiment, this module uses British Parma company PM2839 UV mercury lamp pipe as the solidification light source, can effectively let the structural adhesive solidification. The input power of the UV100 mould pressing module is 20KW, and 600mw/cm can be provided 2 Ultraviolet curing energy, and maximum stamping speed of 120 m/min. The embossing die set is placed in a fifth type printing nest of the overall printing press. The printing and forming optical structure means that optical second structure glue is directly arranged on a second shadow optical roller, after much coating is scraped off by a scraper, the optical second structure glue is transferred onto a printing color layer to generate shadow stripes, and the glue after mould pressing is solidified on the printing color layer through a solidification process.
The second structural adhesive has multiple important factors of flexibility, adhesiveness, heat resistance, fullness and three-dimensional property, and wrinkles may exist in the production and transfer processes, so the second structural adhesive has the requirement of flexibility; the structural adhesive mainly forms lines and a front shadow, and mainly plays a role of a mold, so the structural adhesive is required to be attached to a printing color layer; when the film is applied, the film can be subjected to thermal transfer printing, so that the film is required to have heat resistance, and the film is required to have dynamic and three-dimensional effects, so that the film is required to have fullness and three-dimensional properties. Through no test, the invention provides a plurality of formulas which are prepared, are mainly suitable for different production configurations, the process is not limited, and a producer is easier to operate, and specifically:
the second structural adhesive is high solid content adhesive and comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; 20-60% of ester ketone mixed solvent. Specifically, 40-60% of poly-head D240 hydroxyl polyester resin; corsaint curing agent 3390,1-20%; 20-60% of ester ketone mixed solvent. Alternatively, the first and second electrodes may be,
the second structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1-5% of photoinitiator; monomer UV diluent, 10-50%. Specifically, EB264 aliphatic polyurethane acrylate UV resin accounts for 30 to 40 percent; EB745 acrylic acid esterified acrylate UV resin, 10-20%; 1-5% of photoinitiator; 10-50% of HDDA monomer UV diluent. Alternatively, the first and second electrodes may be,
the second structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; 10-50% of monomer UV diluent. Specifically, 50-80% of an Ecrylic RA 646H emulsion in Kaimes chemical engineering; SY-716 water-based curing agent of Guangsuan Si Yu environmental protection science and technology Limited company, 1-5%; monomer UV diluent, 10-50%.
The second optical structure layer is 5-50 μm thick, preferably 10 μm thick, and the effect is achieved using a UV embossing process.
In the invention, when the first optical structure layer and the second optical structure layer are both manufactured on the same mould pressing printing production line by a mould pressing mode by using a mould pressing machine, the mould pressing machine is a separate thermoforming mould pressing machine or a UV mould pressing machine; the thickness of the first optical structure layer is 5 to 50 μm, preferably 10 μm. The thickness of the second optical structure layer is 5 to 50 μm, preferably 10 μm.
The first optical structure layer and the second optical structure layer are both pressed in a UV glue pressing mode through a UV mould press on the same mould pressing printing production line and then pressed in a 600mw/cm mode 2 And respectively obtaining the first optical structure layer and the second optical structure layer after curing the ultraviolet mercury lamp.
And S4, coating or compounding the side, far away from the printing color layer, of the second optical structure layer to form a light reflecting layer.
The light reflecting layer has the advantages of softness, heat resistance, weather resistance, solvent resistance, recoatability, light reflecting effect and good adhesiveness. Wrinkles may exist during the production and transfer processes, so the light reflecting layer must be flexible; since the application can be a thermal transfer, heat resistance is required, and the heat resistance temperature is 220 ℃ for 30 minutes. The requirements of users during use need to be considered, and weather resistance, solvent resistance, scratch resistance and recoatability need to be provided; considering that the user may add a varnish protection when using, it is necessary to provide the principle of light reflection in the introduction, which means to block two transparent coatings by the action of light reflection, but not to affect the comprehensive performance. The inventor prepares the following formulas through numerous tests, mainly adapts to different production configurations, and ensures that the process is not limited and the operation of a producer is easier. The selected printing and coating process comprises the following steps: gravure printing, coating, preferably gravure printing is used.
In the present invention, the light reflecting layer may be composed of one of a UV paint, a water-based paint, and an oil-based paint. In this embodiment, the light reflecting layer is made of an oil-based paint and is formed by coating in a gravure coating manner using a 50 line/cm anilox roller, and the thickness of the light reflecting layer is 5 to 50 μm, preferably 12 μm, and the light reflecting layer is composed of the following components in percentage by mass: 40-60% of hydroxyl-bearing polyester resin; 5363-20% of curing agent 3390,1; 20 to 60 percent of ester ketone mixed solvent; BH114 nacreous pigment, 5%. Specifically, 40-60% of poly-head D240 with hydroxyl polyester resin; corsaint curing agent 3390,1-20%; 20-60% of ester ketone mixed solvent; jin Meirui BH114 pearlescent pigment, 5%.
Wherein the resin part mainly provides a good adhesive force, and the BH114 pearlescent pigment can provide a transparent metallic silver effect and plays a role in light reaction. Coating with an anilox roller, which is gravure coated with 50 lines/cm anilox roller, with a thickness of 5-50 μm, preferably 12 μm, just fills the second optical structure layer up to provide a pearlescent white reflection.
It should be noted that the pigment inks that provide strong metallic silver effects and that act as light counteractions are equivalent features of the BH114 pearlescent pigments of the present invention, and include: metallic pigments, pearlescent pigments, photonic pigments, coatings, and the like, preferably Jin Meirui's BH114 pearlescent pigment, which provides a transparent metallic pearlescent silvery white effect, acting as a transparent light reaction.
And S5, printing a cover bottom color layer on one side of the light reflection layer far away from the second optical structure layer, coating an adhesive layer on one side of the cover bottom color layer far away from the light reflection layer, and finally rolling to obtain the shadow wood effect heat transfer film.
The cover bottom color layer is used for covering the cover bottom, the configuration of ink of the cover bottom color layer is consistent with that of the printing color layer, and the ink is usually white, black, gray and other color ink, and full-page printing is carried out.
The bottom color layer of the cover belongs to one of color ink layers, which mainly plays a role of covering the color of the bottom color layer, and because the colors of materials transferred by users are not always consistent, the film provided by the invention has high covering effect and is more practical, the formula of the ink is diversified, the color layer mainly takes resin with good flexibility as a base material, and is added with pigment and auxiliary agent, and the functional layer must have the characteristics of heat resistance, weather resistance, light resistance, recoatability, good covering property and the like.
The cover and bottom color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 25 to 35 percent of titanium dioxide; 20-60% of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%; specifically, 40-60% of poly-head D170 hydroxyl polyester resin; 25 to 35 percent of DuPont R706 titanium dioxide; 20-60% of ester ketone mixed solvent; digao TEGO760W wetting dispersant pigment wetting agent, 1%. Can achieve excellent heat resistance, weather resistance, light resistance and covering property, and the D170 hydroxyl polyester resin has good recoatability, thereby being convenient for overprinting of printing ink. The resin and pigment selected for the under color layer are not limited to the above-mentioned resins and pigments, and can be various types of resins and pigments, including urethane resins, UV-based resins, aqueous resins, and the like. The selected printing and coating process comprises the following steps: gravure printing and coating, wherein the plate making modes of the gravure printing comprise laser plate making, electric carving plate making, corrosion plate making and extrusion plate making, and the corresponding plate making modes are selected, so that the printing fineness and the printing coating thickness can be ensured, preferably, the cover and bottom color layers are printed by using the gravure printing, the plate making depth of the gravure printing is 45 mu m, and the coating thickness is 5-20 mu m, preferably 7 mu m.
The adhesive layer bonds the transferred coating with a substrate, and the adhesive layer is required to have good bonding fastness, boiling resistance and yellowing resistance, and in the embodiment, the polyurethane hot melt adhesive is selected, and the molecular structure of the polyurethane hot melt adhesive contains isocyanate groups (-NCO) or urethane groups (-NHCOO) with chemical activity and polarity, so that the adhesive layer has excellent bonding force with porous materials such as textiles, ceramics, wood, leather, paper and the like, and surface-cleaning materials such as glass, metal and the like. The polyurethane hot melt adhesive used in the invention can be divided into a reactive polyurethane hot melt adhesive and a thermoplastic polyurethane hot melt adhesive, wherein the reactive adhesive can react with moisture in the environment after being heated and is crosslinked and cured to form bonding; the thermoplastic adhesive is also called a hot melt polyurethane hot melt adhesive because it is heated and then applied to the surface of an adherend to be adhered by cooling and hardening. The reaction mechanism of the polyurethane hot melt adhesive is moisture curing, which is opposite to that of the EVA hot melt adhesive, the polyurethane hot melt adhesive can not melt after being bonded and reacted with moisture in the environment, belongs to irreversible reaction, has good adhesive strength, temperature resistance and flame retardant property, and can completely solve the use problem of the edge sealing material in high-temperature and multi-oil-smoke environments. The invention specifically uses a T-4129 reactive polyurethane hot melt adhesive and a T-203 thermoplastic polyurethane hot melt adhesive of Fushan gold Merrill chemical Co., ltd, the resin selected by the hot melt adhesive is not limited to the resin and the pigment, and the hot melt adhesive can relate to various types of resins, including polyester resin, waterborne polyurethane resin and the like. The adhesive layer is not necessarily printed because the polyester white glue is preset when the metal material is coated. The selected printing and coating process comprises the following steps: gravure printing, coating, spraying, preferably gravure printing is used.
The adhesive layer is made of polyurethane hot melt adhesive, gravure printing is used for the adhesive layer, the gravure plate making is 60-120 lines/cm, the printing plate making depth is 45 mu m, and the thickness of the coating is 5-20 mu m, preferably 7 mu m.
According to the method, a first optical structure is pressed in a UV glue pressing mode on the same mould pressing printing production line, and a 600mw/cm & lt 2 & gt ultraviolet mercury lamp is cured to obtain a first optical structure layer; coating a light-reflecting release agent in a UV micro-concave coating mode, and curing by using a 600mw/cm2 ultraviolet mercury lamp; obtaining a release layer with light reflection; printing 1 wood wing plate and 3 wood grain color plates in a gravure printing mode, and drying at 100-120 ℃ to obtain a printing color layer; pressing the second optical structure in a UV glue pressing mode, and curing by a 600mw/cm & lt 2 & gt ultraviolet mercury lamp to obtain a second optical structure layer; coating a light reflecting layer in a reticulate pattern roller coating mode, and drying at 100-120 ℃ to obtain the light reflecting layer; printing an adhesive in a gravure printing mode, and drying at 100-120 ℃ to obtain an adhesive layer; when the transfer printing machine is used, the adhesive face faces a transfer printing workpiece, the PET face of the film material is pressed by hot pressing under the condition of pressure at 135-200 ℃, the wood grain pattern can be transferred onto the workpiece, the PET film is torn off, the first optical structure layer can be peeled off, the shadow wood effect with complete lines, colors and shadows can be obtained on the workpiece, and the wood grain transfer printing layer after thermal transfer printing is clear in colors, shadows and lines, as shown in figure 3. The film of the invention has the following characteristics: the shadow and the grain are strong, and the layering sense is strong under the condition of illumination; the hand feeling texture is obvious, and the simulation degree is high; the printing color is rich, the weather resistance is high, and the chemical resistance test in all aspects is excellent; the color register lines and the shading are accurate; the transfer printing speed is high, and energy can be saved; based on a thermal transfer mechanism, the surface scratch-resistant hardening effect is better by matching with a post-hardening mode.
In the shadow transfer film prepared by the method of the invention:
bottom film: providing a basis for the printed material.
A first optical structure layer: a mold for forming the texture.
Light reflecting release layer: the mold matched with the texture formed by the first optical structure layer forms a release layer, and the introduced light reaction is an important component of the whole film system, so that the texture is generated, the lower color layer is protected, the total rotation and release guarantee is provided, and the light reaction is realized.
Color layer: the color printing device comprises a printing color layer and a cover bottom color layer, wherein the printing color layer mainly provides printing colors, the printing color layer provides wood grain colors, and the cover bottom color layer covers the cover bottom.
The second optical structure layer: a shadow is formed.
Light reflecting layer: and plays a role of light reaction.
And (3) adhesive layer: and the function of thermal transfer printing viscose is realized.
The core of the technology is as follows: the use of optical structures, the introduction of the principle of light reflection, uses a mold to form the pattern. The combination of the three technologies finally fully reflects the color, the shadow and the texture.
Because the prepared film is printed in the printing machine with the same main machine shaft (namely the same mould pressing printing production line), the color, the shadow and the grain color register are accurate, thereby expressing the real characteristics of the log in a reducibility way. When the heat transfer film is used, the texture and the color of the shadow wood can be transferred to a workpiece only by a hot pressing mode, after the basement membrane is torn off (the first optical structure layer can be torn off along with the basement membrane), the workpiece can achieve an ideal attaching effect, the texture of the shadow wood is clear and accurate, and the layers are obvious.
The invention also provides a shadow-wood effect heat transfer film with an optical structure, which comprises a bottom film, a first optical structure layer, a light reflecting release layer, a printing color layer, a second optical structure layer, a light reflecting layer, a bottom covering color layer and an adhesive layer which are sequentially laminated, wherein the shadow-wood transfer film with the optical structure is prepared by the preparation method of the shadow-wood effect heat transfer film with the optical structure, and the coating of the grain, shadow, color, release, light reflecting and adhesive coating of a film material is finished on a production machine shaft so as to ensure that the pattern, the shadow and the grain can effectively match the flower.
Compared with the prior art, the method for preparing the shadow wood effect heat transfer film with the optical structure and the shadow wood transfer film prepared by the method can transfer the texture and the color of the shadow wood to a workpiece only by a hot pressing mode, the workpiece can achieve an ideal attachment effect after the basement film is torn off, the shadow wood texture is clear and accurate, and the layers are obvious; after the innovative post-curing coating is inserted and the finished product is transferred, the UV lamp is irradiated, so that the surface hardness of the workpiece can be greatly improved. The shadow wood transfer film prepared by the method has the advantages of obvious dynamic film shadow wood grains, obvious hand feeling grains, high apparent simulation degree, excellent processability, capability of reducing consumption of wood resources and good environmental protection effect.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (11)

1. A preparation method of a shadow-wood effect heat transfer film with an optical structure is characterized by comprising the following steps:
s1, preparing two shadow wood optical rollers by a shadow taking technology, wherein the two shadow wood optical rollers comprise a first shadow wood optical roller and a second shadow wood optical roller, and the first shadow wood optical roller and the second shadow wood optical roller can be patterned in a sleeving manner;
s2, providing a bottom film, coating a first structural adhesive on the bottom film, and utilizing the first bakelite optical roller to generate shading patterns on the first structural adhesive in a mould pressing or printing mode to form a first optical structure layer;
s3, sequentially overlapping a composite light reflection release layer and a printing color layer on one side of the first optical structure layer, which is far away from the bottom film, coating a second structure adhesive on one side of the printing color layer, which is far away from the light reflection release layer, and enabling the second structure adhesive to generate shading by utilizing a second shading wood optical roller through a mould pressing or printing mode so as to form a second optical structure layer;
s4, coating or compounding one side of the second optical structure layer, which is far away from the printing color layer, to form a light reflecting layer;
and S5, printing a cover bottom color layer on one side of the light reflection layer far away from the second optical structure layer, coating an adhesive layer on one side of the cover bottom color layer far away from the light reflection layer, and finally rolling to obtain the shadow wood effect heat transfer film.
2. The method for preparing the shadow-wood effect heat transfer film with the optical structure according to claim 1, wherein the manufacturing of the shadow-wood optical roller specifically comprises the processes of shadow-taking, algorithm, carving and surface treatment;
the image taking comprises any one of direct wood grain complex grain image taking, laser beam image taking, physical contact image taking and light scanning image taking;
the algorithm is to generate a dxf or dwg format file by utilizing a preset algorithm operation after the file is obtained through the image taking procedure;
and the engraving is to engrave the steel roller or the copper-plated steel roller according to the format file.
3. The method for preparing a thermal transfer film with optical structure and effect of shadow wood according to claim 1, wherein the first optical structure layer and the second optical structure layer are both formed by a mold press, the mold press is a separate thermoforming mold press or a UV mold press; the thickness of the first optical structure layer is 5-50 μm, and the thickness of the second optical structure layer is 5-50 μm.
4. The method of claim 3, wherein the first optical structure layer and the second optical structure layer are both UV-pressed by a UV press, and then 600mw/cm after UV-pressing by a UV press 2 And respectively obtaining the first optical structure layer and the second optical structure layer after curing the ultraviolet mercury lamp.
5. The method for preparing a shadow effect heat transfer film having an optical structure according to claim 1, wherein,
the first structural adhesive is a high solid content adhesive and comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; s37, 1 to 5 percent of release slipping agent; 20-60% of ester ketone mixed solvent; the second structural adhesive is high solid content adhesive and comprises the following components in percentage by mass: 40-60% of hydroxyl-bearing polyester resin; 5363% of curing agent 3390,1-20%; 20 to 60 percent of ester ketone mixed solvent; alternatively, the first and second electrodes may be,
the first structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1-5% of photoinitiator; s37, 1 to 5 percent of release slipping agent; monomer UV diluent, 10-50%; the second structural adhesive is UV adhesive and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; 1-5% of photoinitiator; 10-50% of monomer UV diluent; alternatively, the first and second electrodes may be,
the first structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; s37, 1 to 5 percent of release slipping agent; 10-50% of monomer UV diluent; the second structural adhesive is water-based adhesive and comprises the following components in percentage by mass: 50-80% of emulsion; 1-5% of water-based curing agent; 10-50% of monomer UV diluent.
6. The method for preparing a shadow-wood effect heat transfer film with an optical structure according to claim 1, wherein the light reflecting release layer is made of a UV coating and comprises the following components in percentage by mass: 30-40% of aliphatic polyurethane acrylate UV resin; 10-20% of acrylated acrylate UV resin; TPO photoinitiator, 1-5%; monomer UV diluent, 10-50%; BH114 pearlescent pigment 5%; the thickness of the light reflecting release layer is 5-50 mu m.
7. The method for preparing a shadow wood effect heat transfer film with an optical structure according to claim 1, wherein the printing color layer is used for providing a wood grain color, and the printing color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 10 to 25 percent of pigment; 20 to 60 percent of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%; the printing color layer is printed by gravure, the plate making of gravure is 60-120 lines/cm, the depth of plate making of printing is 45 mu m, the printing color layer is composed of a plurality of printing colors, and the thickness of the coating is 5-20 mu m.
8. The method for preparing a shadow-wood effect heat transfer film with an optical structure according to claim 1, wherein the light reflection layer is made of an oil paint and is formed by coating in a gravure coating manner by using a 50 line/cm anilox roller, the thickness of the light reflection layer is 5-50 μm, and the light reflection layer comprises the following components in percentage by mass: 40-60% of hydroxyl-containing polyester resin; 5363-20% of curing agent 3390,1; 20-60% of ester ketone mixed solvent; BH114 nacreous pigment, 5%.
9. The method for preparing a shadow wood effect heat transfer film with an optical structure according to claim 1, wherein the cover and background color layer is used for covering a cover and a background, and the cover and background color layer comprises the following components in percentage by mass: 40-60% of hydroxyl-bearing polyester resin; 25 to 35 percent of titanium dioxide; 20-60% of ester ketone mixed solvent; wetting dispersant pigment wetting agent, 1%; the cover and bottom color layer is printed by gravure, the plate making by gravure is 60-70 lines/cm, the depth of the plate making by gravure is 45 mu m, and the thickness of the coating is 5-20 mu m.
10. The method for preparing a shadow-wood effect heat transfer film with an optical structure as claimed in claim 1, wherein the adhesive layer is made of polyurethane hot melt adhesive, the adhesive layer is printed by gravure, the gravure plate making is 60-120 lines/cm, the printing plate making depth is 45 μm, and the coating thickness is 5-20 μm.
11. A shadow wood transfer film with an optical structure is characterized by comprising a base film, a first optical structure layer, a light reflecting release layer, a printing color layer, a second optical structure layer, a light reflecting layer, a cover bottom color layer and an adhesive layer which are sequentially laminated, wherein the shadow wood transfer film with the optical structure is prepared by the shadow wood effect heat transfer film with the optical structure according to any one of claims 1 to 10.
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