Plate coating transfer film as well as preparation method and application thereof

Abstract

The invention discloses a plate coating transfer film as well as a preparation method and application thereof, and relates to the field of transfer films. The plate coating transfer printing film comprises a base film layer, a matte coating, a colored paint finish paint layer, a middle coating and a water-based bottom coating which are sequentially overlapped. The scratch-resistant decorative artificial board can be directly hot-pressed to the surface of a shaving board, a density fiberboard and other base materials, after the base film layer and the matte coating are torn off, the coating can be firmly attached to the surface of the base materials, the scratch-resistant decorative artificial board has the advantages of high hardness and high toughness, and the prepared decorative artificial board has good scratch resistance.

Description

Technical Field

[0001] The invention relates to the technical field of transfer films, and in particular to a plate coating transfer film and a preparation method and application thereof. Background Art

[0002] Melamine board decorative board is a common man-made board with advantages such as fire resistance, wear resistance, corrosion resistance and environmental protection. It is widely used in wardrobes, cabinets, desks, etc. Generally, a layer of decorative paper impregnated with melamine formaldehyde resin is attached to the surface of a substrate such as particleboard or density fiberboard. The melamine formaldehyde resin on the decorative paper is melted and penetrated into the substrate through high temperature hot pressing. The resin is cross-linked and solidified to form a hard surface, so that the decorative paper is firmly attached to the surface of the substrate to obtain the melamine board decorative board.

[0003] During the production process, it is necessary to apply paint on the decorative paper surface of the melamine board to improve its decorative and protective properties, and to achieve the effects of regulating surface gloss, anti-fingerprint, and anti-corrosion. The general process of coating the melamine board includes: grinding, cleaning, and removing impurities on the surface of the melamine board to ensure that the surface is flat and smooth after coating; applying primer to improve the adhesion of the topcoat; applying topcoat to give the melamine board decorative board effects such as gloss, color, and durability. Paint application is generally achieved through ultraviolet curing coating; the melamine formaldehyde resin on the surface of the melamine board has a relatively stable chemical structure, low surface energy, and low surface polarity, while most UV resins have a certain polarity, resulting in poor compatibility between the paint and the melamine formaldehyde resin, and weak interaction, which makes it difficult for the paint to adhere to the melamine board decorative board. In the related art, the adhesion primer on the triammine board decorative plate generally uses pure propylene acrylic resin with low hardness as the main resin to improve the adhesion to the triammine board. If the hardness of the primer is not high enough, the hardness of the coating after painting will be low and the scratch resistance will be poor. As a result, if the surface of the triammine board decorative plate is scratched or collided by sharp objects during daily use, the coating is prone to scratches, peeling and other problems. According to the pencil test film hardness method provided by GB / T 6739 and ASTM D3363 standards, the chisel hardness of the triammine board decorative plate on the market is about 3~5H; when using a pencil test with a hardness of more than 6H, the coating will be scratched and the substrate will be exposed. In addition, during the paint coating process, the paint will release volatile harmful substances. The board factory needs to treat the organic volatiles in the exhaust gas, and the environmental protection cost investment is relatively large. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a plate coating transfer film, which can be directly hot-pressed onto the surface of a substrate such as a particleboard and a density fiberboard, the coating can be firmly attached to the surface of the substrate, and has the advantages of high hardness and high toughness, and the prepared decorative artificial board has good scratch resistance.

[0005] The invention also provides a method for preparing the plate coating transfer film.

[0006] The present invention also provides application of the plate coating transfer film or the preparation method in preparing decorative artificial boards.

[0007] The invention also provides a method for preparing the decorative artificial board.

[0008] The invention also provides a decorative artificial board.

[0009] The sheet coating transfer film according to the first embodiment of the present invention comprises a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer stacked in sequence; The color paint topcoat layer is formed by curing the color paint topcoat layer coating; the color paint topcoat layer coating comprises the following preparation raw materials in weight percentage: 30% to 60% of a first radiation curable resin, 10% to 25% of a first UV monomer, 0.5% to 2% of a first wetting dispersant, 0.1% to 2% of a first ultraviolet absorber, 1% to 4% of an anti-settling agent, 15% to 25% of a first filler, and 5% to 10% of a pigment; The middle coating is formed by curing the middle coating paint; the middle coating paint comprises the following preparation raw materials in weight percentage: 30% to 50% of a first thermosetting resin, 20% to 60% of a second radiation curing resin, 5% to 30% of a second UV monomer, 0% to 3% of a catalyst, and 0.1% to 2% of a second ultraviolet absorber; The water-based base coating is formed by curing a water-based primer layer coating; the water-based base coating coating comprises the following preparation raw materials in weight percentage: 38% to 64% of a water-based resin, 18% to 43% of a second thermosetting resin, 0.1% to 2% of a second wetting dispersant, and 14% to 24% of a second filler.

[0010] The sheet coating transfer film according to the embodiment of the present invention has at least the following beneficial effects: The board coating transfer film of the embodiment can be directly hot pressed onto the surface of a substrate such as a particleboard and a density fiberboard. After hot pressing, the color paint topcoat layer is transferred to the surface of the substrate. The coating can be firmly attached to the surface of the substrate and has the advantages of high hardness and high toughness. The prepared decorative artificial board has good scratch resistance.

[0011] The middle coating is used to connect the color paint topcoat and the water-based basecoat. If the middle coating is omitted, the adhesion between the coatings will be poor. In the middle coating, if the content of the first thermosetting resin is less than 30%, it will affect the adhesion between the middle coating and the water-based basecoat, and if it is higher than 50%, the hardness and toughness of the middle coating will be poor.

[0012] In the water-based primer coating, if the content of the second thermosetting resin is less than 18%, the hardness of the water-based primer coating will be affected; if it is higher than 43%, the primer coating will become brittle or sticky, affecting the winding performance of the coating before hot pressing; if the content of the second filler is less than 14%, the covering ability of the water-based primer coating on the substrate will be affected, and if it is higher than 24%, it will affect the adhesion between the water-based primer coating and the substrate.

[0013] According to some embodiments of the present invention, the color paint topcoat layer includes the following preparation raw materials in weight percentage: 48%~54% of a first radiation-curable resin, 14%~18% of a first UV monomer, 0.5%~2% of a first wetting dispersant, 0.5%~2% of a first ultraviolet absorber, 0.8%~1.7% of an anti-settling agent, 18%~22% of a first filler, and 8%~10% of a pigment.

[0014] According to some embodiments of the present invention, the first radiation-curable resin includes high-functional polyurethane acrylate and low-functional polyurethane acrylate.

[0015] According to some embodiments of the present invention, the first radiation-curable resin includes a high-functionality polyurethane acrylate with a functionality ≥5 and a low-functionality polyurethane acrylate with a functionality ≤3.

[0016] According to some embodiments of the present invention, the first radiation-curable resin includes a high-functionality polyurethane acrylate having a functionality of 5 to 15 (for example, the functionality can be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15) and a low-functionality polyurethane acrylate having a functionality of 2 to 3 (for example, the functionality can be 2 or 3).

[0017] According to some embodiments of the present invention, the high-functional polyurethane acrylate includes at least one of 15-functional polyurethane acrylate, 12-functional polyurethane acrylate, 9-functional polyurethane acrylate, and 6-functional polyurethane acrylate.

[0018] According to some embodiments of the present invention, the low-functional polyurethane acrylate includes at least one of tri-functional polyurethane acrylate and bi-functional polyurethane acrylate.

[0019] According to some embodiments of the present invention, the mass ratio of the high-functional polyurethane acrylate to the low-functional polyurethane acrylate is (3-1.5): 1. For example, it can be 3: 1, 2.5: 1, 2: 1, 1.5. If the mass ratio is too high or too low, the hardness and toughness of the paint coating will deteriorate.

[0020] According to some embodiments of the present invention, the first UV monomer includes at least one of hydroxyethyl methacrylate (HEMA), hydroxyethyl acrylate (HEA), tetrahydrofuran acrylate (THFA), isobornyl acrylate (IBOA), dipropylene glycol diacrylate (DPGDA), 1,6-hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), trimethylolpropane triacrylate (TMPTA), ethoxylated trimethylolpropane triacrylate ((EO)3-TMPTA), pentaerythritol triacrylate (PETA), and pentaerythritol tetraacrylate (PET4A).

[0021] According to some embodiments of the present invention, the first wetting and dispersing agent includes at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159.

[0022] According to some embodiments of the present invention, the first ultraviolet absorber includes at least one of UV-326, UV-329, UV-328, UV-531, UV-571, UV-P, UV-O, and UV-9.

[0023] According to some embodiments of the present invention, the anti-settling agent includes fumed silica.

[0024] According to some embodiments of the present invention, the fumed silica is hydrophobic fumed silica.

[0025] According to some embodiments of the present invention, the first filler includes at least one of talc, titanium dioxide, lithopone, barium sulfate, and calcium carbonate.

[0026] According to some embodiments of the present invention, the middle coating layer includes the following preparation raw materials in weight percentage: 30%~50% of a first thermosetting resin, 35%~58% of a second radiation-curable resin, 8%~14% of a second UV monomer, 0%~3% of a catalyst, and 0.5%~2% of a second ultraviolet absorber.

[0027] According to some embodiments of the present invention, the first thermosetting resin includes at least one of highly methylated melamine resin, highly imino methylated melamine resin, partially methylated melamine resin, and methylated urea-formaldehyde resin.

[0028] According to some embodiments of the present invention, the highly methylated melamine resin is selected from CYMEL 300, CYMEL301, CYMEL 303LF, CYMEL 304, CYMEL 308, CYMEL 350, CYMEL 3745, CYMELXW 3106, and CYMEL MM-100 of Changxin Resin Co., Ltd.

[0029] According to some embodiments of the present invention, the high-iminomethylether melamine resin is selected from CYMEL 323, CYMEL 325, CYMEL 327, CYMEL 328, and CYMEL 385 of Changxin Resin Co., Ltd.

[0030] According to some embodiments of the present invention, the partially methylated melamine resin is selected from CYMEL 370, CYMEL 373, and CYMEL 380 of Changxin Resin Co., Ltd.

[0031] According to some embodiments of the present invention, the methylated urea-formaldehyde resin is selected from CYMEL U-65 and CYMEL U-15 of Changxin Resin Co., Ltd.

[0032] According to some embodiments of the present invention, the functionality of the second radiation-curable resin is 3 to 9. For example, it may be 3, 4, 5, 6, 7, 8 or 9.

[0033] According to some embodiments of the present invention, the second radiation-curable resin includes at least one of 9-functional polyurethane acrylate, 6-functional polyurethane acrylate, and 3-functional polyurethane acrylate.

[0034] According to some embodiments of the present invention, the second UV monomer includes at least one of HEMA, HEA, hydroxypropyl acrylate (HPA), hydroxypropyl methacrylate (HPMA), THFA, IBOA, DPGDA, HDDA, TPGDA, TMPTA, (EO)3-TMPTA, PETA, and PET4A.

[0035] According to some embodiments of the present invention, the catalyst includes a sulfonic acid catalyst or an organic phosphoric acid catalyst.

[0036] According to some embodiments of the present invention, the organic phosphoric acid catalyst includes CYCAT296-9 from Allnex Resins Co., Ltd.

[0037] According to some embodiments of the present invention, the sulfonic acid catalyst includes at least one of CYCAT4040, CYCAT 4045, and CYCAT 600 produced by Allnex Resins Co., Ltd.

[0038] According to some embodiments of the present invention, the second ultraviolet absorber includes at least one of UV-326, UV-329, UV-328, UV-531, UV-571, UV-P, UV-O, and UV-9.

[0039] According to some embodiments of the present invention, the water-based base coating includes the following preparation raw materials in weight percentage: 40% to 60% water-based resin, 26% to 43% second thermosetting resin, 0.5% to 1% second wetting dispersant, and 14% to 16% second filler.

[0040] According to some embodiments of the present invention, the water-based resin includes at least one of styrene acrylic emulsion, hydroxyl acrylic resin emulsion, heat-activated polyurethane acrylate resin, and water-based acrylic emulsion.

[0041] According to some embodiments of the present invention, the solid content of the water-based resin is 40% to 50%, for example, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49% or 50%.

[0042] According to some embodiments of the present invention, the second thermosetting resin includes at least one of melamine formaldehyde resin, urea-formaldehyde resin, high-imino methyl-etherified melamine resin, partially methyl-etherified melamine resin, and methyl-etherified urea-formaldehyde resin.

[0043] According to some embodiments of the present invention, the second wetting and dispersing agent includes at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159.

[0044] According to some embodiments of the present invention, the second filler includes at least one of titanium dioxide, lithopone, barium sulfate, and calcium carbonate.

[0045] According to some embodiments of the present invention, the base film layer is selected from PET film, PI film, PC film, and PMMA film.

[0046] According to some embodiments of the present invention, the base film layer is corona treated.

[0047] According to some embodiments of the present invention, the matte coating is formed by curing a matte coating paint; the matte coating paint includes the following preparation raw materials measured in weight percentage: 0.05%~1% leveling agent, 0.2%~0.5% photoinitiator, 10%~30% third UV monomer, 68%~80% third radiation-curable resin, 1%~10% matting powder, and 0.1%~1% third dispersant.

[0048] There is a certain adhesion between the transfer coating and the color paint topcoat layer, which makes the sheet coating transfer film have a relatively stable structure before hot pressing and is not easy to separate during the construction stage.

[0049] According to some embodiments of the present invention, the leveling agent is an acrylic leveling agent.

[0050] According to some embodiments of the present invention, the acrylic leveling agent includes but is not limited to BYK361N and BYK358N.

[0051] According to some embodiments of the present invention, the photoinitiator includes at least one of benzophenone (BP), 1-hydroxycyclohexyl phenyl ketone (184), and 2,4,6-dimethylbenzoyldiphenoxide (TPO).

[0052] According to some embodiments of the present invention, the third dispersant includes at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159.

[0053] According to some embodiments of the present invention, the third UV monomer includes at least one of HEMA, THFA, IBOA, DPGDA, HDDA, TPGDA, TMPTA, (EO)3-TMPTA, PETA, and PET4A.

[0054] According to some embodiments of the present invention, the third radiation-curable resin includes polyester acrylate and polyurethane acrylate.

[0055] According to some embodiments of the present invention, the polyester resin includes at least one of a bifunctional polyester acrylate and a trifunctional polyester acrylate.

[0056] According to some embodiments of the present invention, the polyurethane acrylate includes at least one of bifunctional polyurethane acrylate, trifunctional polyurethane acrylate, and tetrafunctional polyurethane acrylate.

[0057] According to the second aspect of the present invention, the method for preparing the above-mentioned sheet coating transfer film comprises the following steps: (1) preparing a matte coating coating comprising the raw materials for preparing the matte coating, coating the matte coating coating on the base film layer subjected to the first corona treatment, sequentially performing a first radiation curing, an excimer lamp treatment, and a second radiation curing to form the matte coating, and performing a second corona treatment to obtain a matte base film; (2) preparing a color paint topcoat layer coating including the raw materials for preparing the color paint topcoat layer, coating the color paint topcoat layer coating on the matte coating layer, and performing radiation semi-curing to form the color paint topcoat layer; (3) preparing a mid-coat coating comprising the raw materials for preparing the mid-coat, applying the mid-coat coating on the color paint topcoat layer, and performing a third radiation curing to form the mid-coat; (4) preparing a water-based base coating material including the raw materials for preparing the water-based base coating, coating the water-based base coating material on the middle coating layer, and drying the coating to obtain the plate coating transfer film.

[0058] The first radiation curing is performed until the matte coating forms a microgel state, which is beneficial to improving the initial adhesion of the matte coating and preventing it from flowing during the subsequent curing process; the excimer lamp treatment cures the shallow surface layer of the matte coating to form a matte structure; and the second radiation curing treatment is performed to completely cure the matte coating to form a matte coating.

[0059] According to some embodiments of the present invention, the surface tension of the base film layer after the first corona treatment is 40 dynes / cm to 50 dynes / cm, for example, 41 dynes / cm, 42 dynes / cm, 43 dynes / cm, 44 dynes / cm, 45 dynes / cm, 46 dynes / cm, 47 dynes / cm, 48 dynes / cm or 49 dynes / cm.

[0060] According to some embodiments of the present invention, in step (1), the energy of the first radiation curing is 20 mJ / cm 2 ~70mJ / cm 2 For example, it can be 20 mJ / cm 2 , 25 mJ / cm 2 、30 mJ / cm 2 、35 mJ / cm 2 , 40 mJ / cm 2 , 45 mJ / cm 2 , 50 mJ / cm 2 、55 mJ / cm 2 、60 mJ / cm 2 、65 mJ / cm 2 or 70 mJ / cm 2 .

[0061] According to some embodiments of the present invention, in step (1), the excimer lamp treatment is performed using a 172 nm excimer lamp.

[0062] According to some embodiments of the present invention, in step (1), the curing energy of the excimer lamp treatment is 80 mW / cm 2 ~120 mW / cm 2 For example, it can be 80 mW / cm 2 、85 mW / cm 2 , 90 mW / cm2 , 95 mW / cm 2 , 100 mW / cm 2 , 105 mW / cm 2 , 110 mW / cm 2 , 115 mW / cm 2 or 120 mW / cm 2 .

[0063] According to some embodiments of the present invention, in step (1), the radiation dose of the second radiation curing is 50 kGy to 70 kGy. For example, it can be 50 kGy, 52 kGy, 54 kGy, 56 kGy, 58 kGy, 60 kGy, 62 kGy, 64 kGy, 66 kGy, 68 kGy or 70 kGy.

[0064] According to some embodiments of the present invention, in step (1), the voltage of the second radiation curing is 100 kV to 200 kV. For example, it can be 100 kV, 110 kV, 120 kV, 130 kV, 140 kV, 150 kV, 160 kV, 170 kV, 180 kV, 190 kV or 200 kV.

[0065] According to some embodiments of the present invention, the surface tension of the matte base film is 40 dynes / cm to 50 dynes / cm, for example, 41 dynes / cm, 42 dynes / cm, 43 dynes / cm, 44 dynes / cm, 45 dynes / cm, 46 dynes / cm, 47 dynes / cm, 48 dynes / cm or 49 dynes / cm.

[0066] According to some embodiments of the present invention, in step (1), the second radiation curing is performed using an electron accelerator.

[0067] According to some embodiments of the present invention, in step (1), the coating thickness of the matte coating is 10-30 μm. For example, it can be 10 μm, 12 μm, 14 μm, 16 μm, 18 μm, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm or 30 μm.

[0068] According to some embodiments of the present invention, the glossiness of the matte coating at 60° is 1-5. For example, it can be 1, 2, 3, 4 or 5.

[0069] According to some embodiments of the present invention, the glossiness of the matte coating at 85° is 5 to 15. For example, it can be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 or 15.

[0070] According to some embodiments of the present invention, in step (2), the coating thickness of the color paint topcoat layer is 20 μm to 50 μm. For example, it can be 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, 30 μm, 32 μm, 34 μm, 36 μm, 38 μm, 40 μm, 42 μm, 44 μm, 46 μm, 48 or 50 μm.

[0071] According to some embodiments of the present invention, in step (2), the radiation dose of the radiation semi-curing is 1 kGy to 5 kGy. For example, it can be 1 kGy, 1.5 kGy, 2 kGy, 2.5 kGy, 3 kGy, 3.5 kGy, 4 kGy, 4.5 or 5 kGy.

[0072] According to some embodiments of the present invention, in step (2), the voltage of the radiation semi-curing is 100 kV to 200 kV. For example, it can be 100 kV, 110 kV, 120 kV, 130 kV, 140 kV, 150 kV, 160 kV, 170 kV, 180 kV, 190 kV or 200 kV.

[0073] According to some embodiments of the present invention, in step (2), the radiation semi-curing is performed using an electron accelerator.

[0074] According to some embodiments of the present invention, in step (3), the coating thickness of the middle coating is 3 μm to 10 μm. For example, it can be 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm. If the coating thickness of the middle coating is less than 2 μm, it will affect the adhesion between the middle coating and the water-based base coating. If it is greater than 10 μm, it will affect the hardness of the coating.

[0075] According to some embodiments of the present invention, in step (3), the radiation dose of the third radiation curing is 50 kGy to 100 kGy. For example, it can be 50 kGy, 55 kGy, 60 kGy, 65 kGy, 70 kGy, 75 kGy, 80 kGy, 85 kGy, 90 kGy, 95 kGy or 100 kGy.

[0076] According to some embodiments of the present invention, in step (3), the voltage of the third radiation curing is 100 kV to 200 kV. For example, it may be 120 kV.

[0077] According to some embodiments of the present invention, in step (3), the third radiation curing is performed using an electron accelerator.

[0078] According to some embodiments of the present invention, in step (4), the coating thickness of the water-based base coating is 20 μm to 80 μm. For example, it can be 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm or 80 μm. If the coating thickness of the water-based base coating is less than 20 μm, it will affect the adhesion between the water-based base coating and the substrate. If it is greater than 80 μm, it will increase the cost.

[0079] According to some embodiments of the present invention, in step (4), the drying includes at least one of forced air drying and infrared drying.

[0080] According to some embodiments of the present invention, the excimer lamp treatment, the second radiation curing, the radiation semi-curing and / or the third radiation curing are performed in a nitrogen atmosphere with an oxygen content of 10 ppm to 200 ppm. For example, it can be 10 ppm, 20 ppm, 30 ppm, 40 ppm, 50 ppm, 60 ppm, 70 ppm, 80 ppm, 90 ppm, 100 ppm, 110 ppm, 120 ppm, 130 ppm, 140 ppm, 150 ppm, 160 ppm, 170 ppm, 180 ppm, 190 ppm or 200 ppm.

[0081] According to the third aspect of the present invention, the above-mentioned board coating transfer film or its preparation method is used in the preparation of decorative artificial boards.

[0082] A method for preparing a decorative artificial board according to a fourth aspect of the present invention comprises the following steps: The water-based base coating layer side of the above-mentioned board coating transfer film is placed on a substrate, hot pressed, and the base film layer and the matte coating layer are peeled off to obtain the decorative artificial board.

[0083] Since the preparation method adopts all the technical solutions of the plate coating transfer film of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment.

[0084] According to some embodiments of the present invention, the substrate is selected from density fiberboard, particle board, plywood, and blockboard.

[0085] According to some embodiments of the present invention, the temperature of the hot pressing is 185°C to 200°C. For example, it may be 185°C, 187°C, 189°C, 190°C, 192°C, 194°C, 196°C, 198°C or 200°C.

[0086] According to some embodiments of the present invention, the hot pressing pressure is 10 MPa to 20 MPa. For example, it may be 10 MPa, 11 MPa, 12 MPa, 13 MPa, 14 MPa, 15 MPa, 16 MPa, 17 MPa, 18 MPa, 19 MPa or 20 MPa.

[0087] According to some embodiments of the present invention, the heat pressing time is 0.5 min to 2 min. For example, it can be 0.5 min, 0.6 min, 0.7 min, 0.8 min, 0.9 min, 1 min, 1.1 min, 1.2 min, 1.3 min, 1.4 min, 1.5 min, 1.6 min, 1.7 min, 1.8 min, 1.9 min or 2 min.

[0088] A decorative artificial board according to the fifth aspect of the present invention comprises a substrate, a water-based base coating, a mid-coat and a color paint topcoat layer arranged in sequence; the water-based base coating, the mid-coat and the color paint topcoat layer are as defined in the first aspect of the embodiment.

[0089] According to some embodiments of the present invention, the decorative artificial board is prepared by the preparation method described in the embodiment of the fourth aspect.

[0090] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 It is a schematic structural diagram of the plate coating transfer film of the present invention.

[0092] Reference numerals: Base film layer 1, matte coating layer 2, color paint topcoat layer 3, middle coating layer 4, water-based primer layer 5. DETAILED DESCRIPTION

[0093] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0094] In the description of the present invention, if there is a description of first, second, third, etc., it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0095] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0096] When a numerical range is disclosed herein, the above range is considered to be continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0097] "And / or" is used to indicate that one or both of the stated situations may occur, for example, A and / or B includes (A and B) and (A or B).

[0098] If no specific conditions are specified in the examples, the experiments were carried out under conventional conditions or conditions recommended by the manufacturer. The raw materials or instruments used, if no manufacturer is specified, are all conventional products that can be purchased commercially.

[0099] The difunctional polyester resin was purchased from Lankelu New Materials Co., Ltd., model number L-8415; Trifunctional polyurethane acrylate A was purchased from Lancolu New Materials Co., Ltd., model number L-6367-2; 15-functional polyurethane acrylate was purchased from Lankelu New Materials Co., Ltd., model number L-6902; 12-functional polyurethane acrylate was purchased from Baojun Chemical Co., Ltd., model number 2112; 2-functional polyester acrylate was purchased from Lankelu New Materials Co., Ltd., model number L-6120; Hexafunctional polyurethane acrylate was purchased from Changxing Materials Industry Co., Ltd., model number 6197H; Trifunctional polyurethane acrylate B was purchased from Lancolu New Materials Co., Ltd., model number L-6317; Fumed silica was purchased from Evonik Industries, model R974; Green color paste was purchased from Mingguang Kedi Na Micro New Materials Co., Ltd.; Blue color paste was purchased from Mingguang Kedi Na Micro New Materials Co., Ltd.; The water-based resin was purchased from Fujian Huaxialan New Material Technology Co., Ltd., model HXL-C2631, solid content 46% ± 1%; Melamine formaldehyde resin was purchased from Shijiazhuang Fangyu Synthetic Materials Co., Ltd., model LG330.

[0100] Example 1 This example provides a sheet coating transfer film, which is composed of a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer stacked in sequence; The base film layer is a PET film; In terms of weight percentage, the raw materials for preparing the matte coating consist of 0.5% BYK361N, 0.5% TPO, 25% HDDA, 5% matting powder, 0.5% BYK 111, and 68.5% trifunctional polyurethane acrylate A; The raw materials for preparing the color paint topcoat layer are composed of 10% 15-functional polyurethane acrylate, 20% 6-functional polyurethane acrylate, 20% 3-functional polyurethane acrylate B, 5% HEMA, 12% TPGDA, 1% BYK 110, 0.5% UV-326, 1.5% fumed silica, 10% titanium dioxide, 10% talc, 8% green color paste, and 2% blue color paste in percentage by weight; In terms of weight percentage, the raw materials for preparing the middle coating consist of 50% CYMEL 303LF, 36.5% 6-functional polyurethane acrylate, 10% HDDA, 0.5% UV-326, and 3% CYCAT 4045; In terms of weight percentage, the raw materials for preparing the water-based base coating consist of 42% water-based resin, 43% melamine formaldehyde resin, 0.7% BYK 110, and 14.3% lithopone.

[0101] The steps of preparing the plate coating transfer film are as follows: S1. Base film layer treatment: The PET film was subjected to corona treatment so that the surface tension of the treated PET film was 42 dyne / cm.

[0102] S2. Preparation of matte coating: Weigh the corresponding weight of BYK361N, TPO, HDDA, BYK 111, and trifunctional polyurethane acrylate A into a dispersion tank, and use a disperser to stir and disperse for 30 minutes. Then add the matte powder, and use a disperser to stir and disperse for 30 minutes at a speed of 1000 rpm to obtain a matte coating.

[0103] The matte coating was roller-coated onto the PET film treated in step S1, with a coating thickness of 10 μm. A gallium lamp was used for pre-curing, with a curing energy of 40 mJ / cm 2 In a nitrogen atmosphere with an oxygen content of 20 ppm, a 172nm excimer lamp was used for extinction treatment to form a matte structure on the coating surface. The curing energy was 100 mW / cm 2 ; In a nitrogen atmosphere with an oxygen content of 20 ppm, an electron accelerator is used to perform a curing reaction, with an irradiation dose of 60 kGy and a voltage of 120 kV. A PET matte film is obtained. The PET matte film is subjected to a corona treatment, so that the surface tension of the treated PET matte film is 42 dynes / cm.

[0104] The gloss meter was used to test the prepared PET matte film, and the gloss at 60° was 3.8, and the gloss at 85° was 12.7.

[0105] S3, preparing color paint topcoat layer: Weigh corresponding masses of 15-functional polyurethane acrylate, 6-functional polyurethane acrylate, 3-functional polyurethane acrylate B, HEMA, TPGDA, BYK 110 and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes; then add fumed silica, titanium dioxide, talcum powder, green color paste and blue color paste, and disperse and stir at 1000 rpm for 60 minutes to obtain a color paint topcoat layer coating.

[0106] The color paint topcoat layer coating was applied to the matte coating layer of the PET matte film obtained in step S2, with a coating thickness of 30 μm. Semi-curing was performed using an electron accelerator in a nitrogen atmosphere, with an irradiation dose of 2 kGy and a voltage of 120 kV. Composite film A was obtained.

[0107] S4. Preparation of mid-coating: Weigh corresponding masses of CYMEL 303LF, 6-functional polyurethane acrylate, HDDA, UV-326, and CYCAT4045 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes to obtain a mid-coat coating.

[0108] The middle coating was applied to the color paint topcoat layer of the composite film A obtained in step S3, with a coating thickness of 10 μm. In a nitrogen atmosphere, an electron accelerator was used for irradiation curing, with an irradiation dose of 60 kGy and a voltage of 120 kV. A composite film B was obtained.

[0109] S5. Preparation of water-based base coating: Relevant masses of water-based resin, melamine formaldehyde resin and BYK 110 were weighed into a dispersion tank, dispersed and stirred at 800 rpm for 30 minutes, and then lead powder was added, dispersed and stirred at 1000 rpm for 30 minutes to obtain a water-based base coating.

[0110] The water-based primer coating is applied to the middle coating layer of the composite film B obtained in step S3, with a coating thickness of 60 μm; and cured by air drying to obtain a sheet coating transfer film.

[0111] This example also provides a method for preparing a colored paint decorative board using the plate coating transfer film, the steps are as follows: A sheet of the sheet coating transfer film of Example 1 was placed on a density fiberboard with a flat surface, and hot pressed for 30 seconds at a temperature of 200° C. and a pressure of 15 MPa. After the sheet was naturally cooled to room temperature, the PET matte film was torn off to obtain a colored painted decorative board.

[0112] The glossiness of the triamine decorative plate prepared by using the plate coating transfer film of Example 1 was 2.8 at 60° and 8.6 at 85°.

[0113] Example 2 This example provides a sheet coating transfer film, which is composed of a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer stacked in sequence; The base film layer is a PET film; In terms of weight percentage, the raw materials for preparing the matte coating consist of 0.5% BYK361N, 0.5% TPO, 10% HDDA, 8% matting powder, 1% BYK111, and 80% 2-functional polyester acrylate; The raw materials for preparing the color paint topcoat layer are composed of 39% 6-functional polyurethane acrylate, 13% 3-functional polyurethane acrylate B, 15% HDDA, 1% BYK 163, 2% UV-326, 1% fumed silica, 9% titanium dioxide, 10% talc, 8% green color paste, and 2% blue color paste in terms of weight percentage; In terms of weight percentage, the raw materials for preparing the middle coating are 30% CYMEL 327, 56.5% 6-functional polyurethane acrylate, 11.5% HDDA, and 2% UV-326; In terms of weight percentage, the raw materials for preparing the water-based base coating consist of 57% water-based resin, 28% CYMEL 327, 0.7% BYK 110, and 14.3% lithopone.

[0114] The steps of preparing the plate coating transfer film are as follows: S1. Base film layer treatment: The PET film was subjected to corona treatment so that the surface tension of the treated PET film was 42 dyne / cm.

[0115] S2. Preparation of matte coating: Weigh corresponding amounts of BYK361N, TPO, HDDA, and difunctional polyester acrylate into a dispersion tank, and use a disperser to stir and disperse for 30 minutes to obtain a matte coating.

[0116] The matte coating was roller-coated onto the PET film treated in step S1, with a coating thickness of 10 μm. A gallium lamp was used for pre-curing, with a curing energy of 40 mJ / cm 2 In a nitrogen atmosphere with an oxygen content of 20 ppm, a 172nm excimer lamp was used for extinction treatment to form a matte structure on the coating surface. The curing energy was 100 mW / cm 2 ; In a nitrogen atmosphere with an oxygen content of 20 ppm, an electron accelerator is used to perform a curing reaction, with an irradiation dose of 60 kGy and a voltage of 120 kV. A PET matte film is obtained. The PET matte film is subjected to a corona treatment, so that the surface tension of the treated PET matte film is 42 dynes / cm.

[0117] The gloss meter was used to test the prepared PET matte film, and the glossiness at 60° was 4.5, and the glossiness at 85° was 13.8.

[0118] S3, preparing color paint topcoat layer: Weigh corresponding masses of hexafunctional polyurethane acrylate, trifunctional polyurethane acrylate B, HDDA, BYK163 and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes; then add fumed silica, titanium dioxide, talcum powder, green color paste and blue color paste, and disperse and stir at 1000 rpm for 60 minutes to obtain a color paint topcoat layer coating.

[0119] The color paint topcoat layer coating was applied to the matte coating layer of the PET matte film obtained in step S2, with a coating thickness of 30 μm. Semi-curing was performed using an electron accelerator in a nitrogen atmosphere, with an irradiation dose of 2 kGy and a voltage of 120 kV. Composite film A was obtained.

[0120] S4. Preparation of mid-coating: Weigh corresponding masses of CYMEL 327, 6-functional polyurethane acrylate, HDDA, and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes to obtain a mid-coat coating.

[0121] The middle coating was applied to the color paint topcoat layer of the composite film A obtained in step S3, with a coating thickness of 10 μm. In a nitrogen atmosphere, an electron accelerator was used for irradiation curing, with an irradiation dose of 60 kGy and a voltage of 120 kV. A composite film B was obtained.

[0122] S5. Preparation of water-based base coating: Relevant weights of water-based resin, CYMEL 327 and BYK 110 were weighed into a dispersion tank, dispersed and stirred at 800 rpm for 30 minutes, and then lead powder was added, dispersed and stirred at 1000 rpm for 30 minutes to obtain a water-based base coating.

[0123] The water-based primer coating is applied to the middle coating layer of the composite film B obtained in step S3, with a coating thickness of 60 μm; and cured by air drying to obtain a sheet coating transfer film.

[0124] This example also provides a method for preparing a colored paint decorative board using the plate coating transfer film, the steps are as follows: A sheet of the sheet coating transfer film of Example 2 was placed on a density fiberboard with a flat surface, and hot pressed for 2 minutes at a temperature of 185° C. and a pressure of 15 MPa. After the sheet was naturally cooled to room temperature, the PET matte film was torn off to obtain a colored painted decorative board.

[0125] The glossiness of the triamine decorative plate prepared by using the plate coating transfer film of Example 1 at 60° is 3.5° and the glossiness is 9.7.

[0126] Example 3 This example provides a sheet coating transfer film, which is composed of a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer stacked in sequence; The base film layer is a PET film; In terms of weight percentage, the raw materials for preparing the matte coating consist of 0.5% BYK361N, 0.5% TPO, 25% HDDA, 5% matting powder, 0.5% BYK 111, 30% 2-functional polyester acrylate, and 38.5% 3-functional polyurethane acrylate A; The raw materials for preparing the color paint topcoat layer are composed of 10% 12-functional polyurethane acrylate, 27% 6-functional polyurethane acrylate, 15% 3-functional polyurethane acrylate B, 3% HEMA, 12% TPGDA, 1% BYK 110, 0.5% UV-326, 1.5% fumed silica, 10% titanium dioxide, 10% talc, 8% green color paste, and 2% blue color paste in percentage by weight; In terms of weight percentage, the raw materials for preparing the middle coating consist of 50% CYMEL 303LF, 36.5% 6-functional polyurethane acrylate, 10% HDDA, 0.5% UV-326, and 3% CYCAT 4045; In terms of weight percentage, the raw materials for preparing the water-based base coating consist of 50% water-based resin, 35% CYMEL 327, 0.7% BYK 110, and 14.3% lithopone.

[0127] The steps of preparing the plate coating transfer film are as follows: S1. Base film layer treatment: The PET film was subjected to corona treatment so that the surface tension of the treated PET film was 42 dyne / cm.

[0128] S2. Preparation of matte coating: Weigh the corresponding weights of BYK361N, TPO, HDDA, BYK 111, 2-functional polyester acrylate, and 3-functional polyurethane acrylate A into a dispersion tank, and use a disperser to stir and disperse for 30 minutes. Then add the matte powder, and use a disperser to stir and disperse for 30 minutes at a speed of 1000 rpm to obtain a matte coating.

[0129] The matte coating was roller-coated onto the PET film treated in step S1, with a coating thickness of 10 μm. A gallium lamp was used for pre-curing, with a curing energy of 40 mJ / cm 2 In a nitrogen atmosphere with an oxygen content of 20 ppm, a 172nm excimer lamp was used for extinction treatment to form a matte structure on the coating surface. The curing energy was 100 mW / cm 2 ; In a nitrogen atmosphere with an oxygen content of 20 ppm, an electron accelerator is used to perform a curing reaction, with an irradiation dose of 60 kGy and a voltage of 120 kV. A PET matte film is obtained. The PET matte film is subjected to a corona treatment, so that the surface tension of the treated PET matte film is 42 dynes / cm.

[0130] The gloss meter was used to test the prepared PET matte film, and the gloss at 60° was 3.8, and the gloss at 85° was 12.7.

[0131] S3, preparing color paint topcoat layer: Weigh corresponding masses of 12-functional polyurethane acrylate, 6-functional polyurethane acrylate, 3-functional polyurethane acrylate B, HEMA, TPGDA, BYK 110 and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes; then add fumed silica, titanium dioxide, talcum powder, green color paste and blue color paste, and disperse and stir at 1000 rpm for 60 minutes to obtain a color paint topcoat layer coating.

[0132] The color paint topcoat layer coating was applied to the matte coating layer of the PET matte film obtained in step S2, with a coating thickness of 30 μm. Semi-curing was performed using an electron accelerator in a nitrogen atmosphere, with an irradiation dose of 2 kGy and a voltage of 120 kV. Composite film A was obtained.

[0133] S4. Preparation of mid-coating: Weigh corresponding masses of CYMEL 303LF, 6-functional polyurethane acrylate, HDDA, UV-326, and CYCAT4045 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes to obtain a mid-coat coating.

[0134] The middle coating was applied to the color paint topcoat layer of the composite film A obtained in step S3, with a coating thickness of 10 μm. In a nitrogen atmosphere, an electron accelerator was used for irradiation curing, with an irradiation dose of 60 kGy and a voltage of 120 kV. A composite film B was obtained.

[0135] S5. Preparation of water-based base coating: Relevant weights of water-based resin, CYMEL 327 and BYK 110 were weighed into a dispersion tank, dispersed and stirred at 800 rpm for 30 minutes, and then lead powder was added, dispersed and stirred at 1000 rpm for 30 minutes to obtain a water-based base coating.

[0136] The water-based primer coating is applied to the middle coating layer of the composite film B obtained in step S3, with a coating thickness of 60 μm; and cured by air drying to obtain a sheet coating transfer film.

[0137] This example also provides a method for preparing a colored paint decorative board using the plate coating transfer film, the steps are as follows: A sheet of the sheet coating transfer film of Example 3 was placed on a density fiberboard with a flat surface, and hot pressed for 30 seconds at a temperature of 200° C. and a pressure of 15 MPa. After the sheet was naturally cooled to room temperature, the PET matte film was torn off to obtain a colored painted decorative board.

[0138] The glossiness of the triamine decorative plate made by using the plate coating transfer film of Example 3 is 2.8 at 60° and 8.6 at 85°.

[0139] Comparative Example 1 This example provides a plate coating transfer film, which is basically the same as Example 1, except that the formula of the middle coating layer and the coating thickness of the middle coating layer are different.

[0140] The plate coating transfer film is composed of a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer which are stacked in sequence; The base film layer is a PET film; In terms of weight percentage, the raw materials for preparing the matte coating consist of 0.5% BYK361N, 0.5% TPO, 25% HDDA, 5% matting powder, 0.5% BYK 111, and 68.5% trifunctional polyurethane acrylate A; The raw materials for preparing the color paint topcoat layer are composed of 10% 15-functional polyurethane acrylate, 20% 6-functional polyurethane acrylate, 20% 3-functional polyurethane acrylate B, 5% HEMA, 12% TPGDA, 1% BYK 110, 0.5% UV-326, 1.5% fumed silica, 10% titanium dioxide, 10% talc, 8% green color paste, and 2% blue color paste in percentage by weight; In terms of weight percentage, the raw materials for preparing the middle coating consist of 20% CYMEL 303LF, 66.5% 6-functional polyurethane acrylate, 10% HDDA, 0.5% UV-326, and 3% CYCAT 4045; In terms of weight percentage, the raw materials for preparing the water-based base coating consist of 42% water-based resin, 43% melamine formaldehyde resin, 0.7% BYK 110, and 14.3% lithopone.

[0141] The steps of preparing the plate coating transfer film are as follows: S1. Base film layer treatment: The PET film was subjected to corona treatment so that the surface tension of the treated PET film was 42 dyne / cm.

[0142] S2. Preparation of matte coating: Weigh the corresponding weight of BYK361N, TPO, HDDA, BYK 111, and trifunctional polyurethane acrylate A into a dispersion tank, and use a disperser to stir and disperse for 30 minutes. Then add the matte powder, and use a disperser to stir and disperse for 30 minutes at a speed of 1000 rpm to obtain a matte coating.

[0143] The matte coating was roller-coated onto the PET film treated in step S1, with a coating thickness of 10 μm. A gallium lamp was used for pre-curing, with a curing energy of 40 mJ / cm 2 In a nitrogen atmosphere with an oxygen content of 20 ppm, a 172nm excimer lamp was used for extinction treatment to form a matte structure on the coating surface. The curing energy was 100 mW / cm 2 ; In a nitrogen atmosphere with an oxygen content of 20 ppm, an electron accelerator is used to perform a curing reaction, with an irradiation dose of 60 kGy and a voltage of 120 kV. A PET matte film is obtained. The PET matte film is subjected to a corona treatment, so that the surface tension of the treated PET matte film is 42 dynes / cm.

[0144] The gloss meter was used to test the prepared PET matte film, and the gloss at 60° was 3.8, and the gloss at 85° was 12.7.

[0145] S3, preparing color paint topcoat layer: Weigh corresponding masses of 15-functional polyurethane acrylate, 6-functional polyurethane acrylate, 3-functional polyurethane acrylate B, HEMA, TPGDA, BYK 110 and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes; then add fumed silica, titanium dioxide, talcum powder, green color paste and blue color paste, and disperse and stir at 1000 rpm for 60 minutes to obtain a color paint topcoat layer coating.

[0146] The color paint topcoat layer coating was applied to the matte coating layer of the PET matte film obtained in step S2, with a coating thickness of 30 μm. Semi-curing was performed using an electron accelerator in a nitrogen atmosphere, with an irradiation dose of 2 kGy and a voltage of 120 kV. Composite film A was obtained.

[0147] S4. Preparation of mid-coating: Weigh corresponding masses of CYMEL 303LF, 6-functional polyurethane acrylate, HDDA, UV-326, and CYCAT4045 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes to obtain a mid-coat coating.

[0148] The middle coating was applied to the color paint topcoat layer of the composite film A obtained in step S3, with a coating thickness of 2 μm. In a nitrogen atmosphere, an electron accelerator was used for irradiation curing, with an irradiation dose of 60 kGy and a voltage of 120 kV. A composite film B was obtained.

[0149] S5. Preparation of water-based base coating: Relevant masses of water-based resin, melamine formaldehyde resin and BYK 110 were weighed into a dispersion tank, dispersed and stirred at 800 rpm for 30 minutes, and then lead powder was added, dispersed and stirred at 1000 rpm for 30 minutes to obtain a water-based base coating.

[0150] The water-based primer coating is applied to the middle coating layer of the composite film B obtained in step S3, with a coating thickness of 60 μm; and cured by air drying to obtain a sheet coating transfer film.

[0151] This example also provides a method for preparing a colored paint decorative board using the plate coating transfer film, the steps are as follows: A sheet of the coating transfer film of Comparative Example 1 was placed on a density fiberboard with a flat surface, and hot pressed for 30 seconds at a temperature of 200° C. and a pressure of 15 MPa. After the sheet was naturally cooled to room temperature, the PET matte film was torn off to obtain a colored painted decorative board.

[0152] The glossiness of the triamine decorative plate made by using the plate coating transfer film of Comparative Example 1 is 2.8 at 60° and 8.6 at 85°.

[0153] Comparative Example 2 This example provides a plate coating transfer film, which is basically the same as Example 1, and the only difference is: the coating thickness of the middle coating paint and the formula of the water-based base coating are different.

[0154] The plate coating transfer film is composed of a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer which are stacked in sequence; The base film layer is a PET film; In terms of weight percentage, the raw materials for preparing the matte coating consist of 0.5% BYK361N, 0.5% TPO, 25% HDDA, 5% matting powder, 0.5% BYK 111, and 68.5% trifunctional polyurethane acrylate A; The raw materials for preparing the color paint topcoat layer are composed of 10% 15-functional polyurethane acrylate, 20% 6-functional polyurethane acrylate, 20% 3-functional polyurethane acrylate B, 5% HEMA, 12% TPGDA, 1% BYK 110, 0.5% UV-326, 1.5% fumed silica, 10% titanium dioxide, 10% talc, 8% green color paste, and 2% blue color paste in percentage by weight; In terms of weight percentage, the raw materials for preparing the middle coating consist of 50% CYMEL 303LF, 36.5% 6-functional polyurethane acrylate, 10% HDDA, 0.5% UV-326, and 3% CYCAT 4045; In terms of weight percentage, the raw materials for preparing the water-based base coating consist of 80% water-based resin, 5% melamine formaldehyde resin, 0.7% BYK 110, and 14.3% lithopone.

[0155] The steps of preparing the plate coating transfer film are as follows: S1. Base film layer treatment: The PET film was subjected to corona treatment so that the surface tension of the treated PET film was 42 dyne / cm.

[0156] S2. Preparation of matte coating: Weigh the corresponding weight of BYK361N, TPO, HDDA, BYK 111, and trifunctional polyurethane acrylate A into a dispersion tank, and use a disperser to stir and disperse for 30 minutes. Then add the matte powder, and use a disperser to stir and disperse for 30 minutes at a speed of 1000 rpm to obtain a matte coating.

[0157] The matte coating was roller-coated onto the PET film treated in step S1, with a coating thickness of 10 μm. A gallium lamp was used for pre-curing, with a curing energy of 40 mJ / cm 2 In a nitrogen atmosphere with an oxygen content of 20 ppm, a 172nm excimer lamp was used for extinction treatment to form a matte structure on the coating surface. The curing energy was 100 mW / cm 2 ; In a nitrogen atmosphere with an oxygen content of 20 ppm, an electron accelerator is used to perform a curing reaction, with an irradiation dose of 60 kGy and a voltage of 120 kV. A PET matte film is obtained. The PET matte film is subjected to a corona treatment, so that the surface tension of the treated PET matte film is 42 dynes / cm.

[0158] The gloss meter was used to test the prepared PET matte film, and the gloss at 60° was 3.8, and the gloss at 85° was 12.7.

[0159] S3, preparing color paint topcoat layer: Weigh corresponding masses of 15-functional polyurethane acrylate, 6-functional polyurethane acrylate, 3-functional polyurethane acrylate B, HEMA, TPGDA, BYK 110 and UV-326 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes; then add fumed silica, titanium dioxide, talcum powder, green color paste and blue color paste, and disperse and stir at 1000 rpm for 60 minutes to obtain a color paint topcoat layer coating.

[0160] The color paint topcoat layer coating was applied to the matte coating layer of the PET matte film obtained in step S2, with a coating thickness of 30 μm. Semi-curing was performed using an electron accelerator in a nitrogen atmosphere, with an irradiation dose of 2 kGy and a voltage of 120 kV. Composite film A was obtained.

[0161] S4. Preparation of mid-coating: Weigh corresponding masses of CYMEL 303LF, 6-functional polyurethane acrylate, HDDA, UV-326, and CYCAT4045 into a dispersion tank, and disperse and stir at 800 rpm for 15 minutes to obtain a mid-coat coating.

[0162] The middle coating was applied to the color paint topcoat layer of the composite film A obtained in step S3, with a coating thickness of 2 μm. In a nitrogen atmosphere, an electron accelerator was used for irradiation curing, with an irradiation dose of 60 kGy and a voltage of 120 kV. A composite film B was obtained.

[0163] S5. Preparation of water-based base coating: Relevant masses of water-based resin, melamine formaldehyde resin and BYK 110 were weighed into a dispersion tank, dispersed and stirred at 800 rpm for 30 minutes, and then lead powder was added, dispersed and stirred at 1000 rpm for 30 minutes to obtain a water-based base coating.

[0164] The water-based primer coating is applied to the middle coating layer of the composite film B obtained in step S3, with a coating thickness of 60 μm; and cured by air drying to obtain a sheet coating transfer film.

[0165] This example also provides a method for preparing a colored paint decorative board using the plate coating transfer film, the steps are as follows: A sheet of the plate coating transfer film of Comparative Example 2 was placed on a density fiberboard with a flat surface, and hot pressed for 30 seconds at a temperature of 200° C. and a pressure of 15 MPa. After the sheet was naturally cooled to room temperature, the PET matte film was torn off to obtain a colored painted decorative board.

[0166] The glossiness of the triamine decorative plate made by using the plate coating transfer film of Comparative Example 2 is 2.8 at 60° and 8.6 at 85°.

[0167] Test example The adhesion of the paint film is measured according to GB / T 4893.4-2023 Test for physical and chemical properties of furniture surface paint films Part 4: Cross-cutting method for adhesion, and the hardness of the paint film is measured according to GB / T 6739-2022 Determination of paint film hardness by pencil method for paints and varnishes (the ability of the paint film surface to resist scratches when a pencil of specified size, shape and pencil lead hardness is pushed across the paint film surface).

[0168] The results are shown in Table 1.

[0169] Table 1

[0170] When the hardness of the paint film of the triamine decorative plate made by using the plate coating transfer film of Examples 1 to 3 is tested with a pencil of 8H hardness, shallow scratches will appear on the surface, and the topcoat (i.e., the color paint topcoat layer) is not scratched to expose the primer (i.e., the water-based primer layer) or the substrate. Compared with the conventional UV-cured triamine decorative plate on the market, after the 8H hardness pencil test, the topcoat will be damaged, exposing the primer or the substrate.

[0171] The embodiments of the present invention are described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A sheet coating transfer film, characterized in that: It includes a base film layer, a matte coating layer, a color paint topcoat layer, a middle coating layer and a water-based primer layer which are stacked in sequence; The color paint topcoat layer is formed by curing the color paint topcoat layer coating; the color paint topcoat layer coating comprises the following preparation raw materials in weight percentage: 30% to 60% of a first radiation curable resin, 10% to 25% of a first UV monomer, 0.5% to 2% of a first wetting dispersant, 0.1% to 2% of a first ultraviolet absorber, 1% to 4% of an anti-settling agent, 15% to 25% of a first filler, and 5% to 10% of a pigment; The middle coating is formed by curing the middle coating paint; the middle coating paint comprises the following preparation raw materials in weight percentage: 30% to 50% of a first thermosetting resin, 20% to 60% of a second radiation curing resin, 5% to 30% of a second UV monomer, 0% to 3% of a catalyst, and 0.1% to 2% of a second ultraviolet absorber; The water-based base coating is formed by curing a water-based primer layer coating; the water-based base coating coating comprises the following preparation raw materials in weight percentage: 38% to 64% of a water-based resin, 18% to 43% of a second thermosetting resin, 0.1% to 2% of a second wetting dispersant, and 14% to 24% of a second filler.

2. The sheet coating transfer film according to claim 1, characterized in that: The first UV monomer includes at least one of HEMA, HEA, THFA, IBOA, DPGDA, HDDA, TPGDA, TMPTA, (EO)3-TMPTA, PETA, and PET4A; and / or, the first wetting and dispersing agent comprises at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159; and / or, the first ultraviolet absorber includes at least one of UV-326, UV-329, UV-328, UV-531, UV-571, UV-P, UV-O, and UV-9; and / or, the anti-settling agent comprises fumed silica; And / or, the first filler includes at least one of talc, titanium dioxide, lithopone, barium sulfate and calcium carbonate.

3. The sheet coating transfer film according to claim 1, characterized in that: The first radiation-curable resin includes high-functional polyurethane acrylate with a functionality of ≥5 and low-functional polyurethane acrylate with a functionality of ≤3. Preferably, the high-functional polyurethane acrylate includes at least one of 15-functional polyurethane acrylate, 12-functional polyurethane acrylate, 9-functional polyurethane acrylate, and 6-functional polyurethane acrylate; Preferably, the low-functional polyurethane acrylate includes at least one of trifunctional polyurethane acrylate and bifunctional polyurethane acrylate; Preferably, the mass ratio of the high-functionality polyurethane acrylate to the low-functionality polyurethane acrylate is 3-1.5:

1.

4. The sheet coating transfer film according to claim 1, characterized in that: The first thermosetting resin comprises at least one of highly methylated melamine resin, highly iminomethylated melamine resin, partially methylated melamine resin, and methylated urea-formaldehyde resin; and / or, the second UV monomer comprises one of HEMA, HEA, HPA, HPMA, THFA, IBOA, DPGDA, HDDA, TPGDA, TMPTA, (EO)3-TMPTA, PETA, and PET4A; and / or, the catalyst comprises a sulfonic acid catalyst or an organic phosphoric acid catalyst; And / or, the second ultraviolet absorber includes at least one of UV-326, UV-329, UV-328, UV-531, UV-571, UV-P, UV-O, and UV-9.

5. The sheet coating transfer film according to claim 1, characterized in that: The water-based resin includes at least one of styrene acrylic emulsion, hydroxy acrylic resin emulsion, heat-activated polyurethane acrylate resin, and water-based acrylic emulsion; And / or, the second thermosetting resin comprises at least one of melamine formaldehyde resin, urea-formaldehyde resin, high-imino methyl-etherified melamine resin, partially methyl-etherified melamine resin, and methyl-etherified urea-formaldehyde resin; and / or, the second wetting and dispersing agent comprises at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159; And / or, the second filler includes at least one of titanium dioxide, lithopone, barium sulfate and calcium carbonate.

6. The sheet coating transfer film according to claim 1, characterized in that: The matte coating is formed by curing a matte coating paint; the matte coating paint includes the following preparation raw materials in weight percentage: 0.05%~1% leveling agent, 0.2%~0.5% photoinitiator, 10%~30% third UV monomer, 68%~80% third radiation curing resin, 1%~10% matting powder, 0.1%~1% third dispersant; preferably, the leveling agent is an acrylic leveling agent; preferably, the photoinitiator includes at least one of benzophenone, 1-hydroxycyclohexyl phenyl ketone, and 2,4,6-dimethylbenzoyldiphenoxyphosphine; preferably, the third radiation curing resin includes polyester acrylate and polyurethane acrylate; preferably, the third dispersant includes at least one of BYK110, BYK111, BYK163, BYK168, BYK2008, BYK-2158, and BYK-2159.

7. The method for preparing a sheet coating transfer film according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) preparing a matte coating coating comprising the raw materials for preparing the matte coating, coating the matte coating coating on the base film layer subjected to the first corona treatment, sequentially performing a first radiation curing, an excimer lamp treatment, and a second radiation curing to form the matte coating, and performing a second corona treatment to obtain a matte base film; (2) preparing a color paint topcoat layer coating including the raw materials for preparing the color paint topcoat layer, coating the color paint topcoat layer coating on the matte coating layer, and performing radiation semi-curing to form the color paint topcoat layer; (3) preparing a mid-coat coating comprising the raw materials for preparing the mid-coat, applying the mid-coat coating on the color paint topcoat layer, and performing a third radiation curing to form the mid-coat; (4) preparing a water-based base coating material including the raw materials for preparing the water-based base coating, coating the water-based base coating material on the middle coating layer, and drying the coating to obtain the plate coating transfer film.

8. Use of the sheet coating transfer film according to any one of claims 1 to 6 or the preparation method according to claim 7 in the preparation of decorative artificial boards.

9. A method for preparing a decorative artificial board, characterized in that: The following steps are involved: The decorative artificial board is obtained by placing the water-based base coating layer on one side of the sheet coating transfer film according to any one of claims 1 to 6 on a substrate, hot pressing, and peeling off the base film layer and the matte coating layer.

10. A decorative artificial board, characterized in that: The invention comprises a substrate, a water-based base coat, a mid-coat and a color paint top coat arranged in sequence; the water-based base coat, the mid-coat and the color paint top coat are as defined in any one of claims 1 to 6.

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