Wood grain transfer film / paper and preparation method thereof, transfer method and wood grain substrate

Abstract

The present invention discloses a wood grain transfer film / paper and a preparation method thereof, a transfer method and a wood grain substrate. The wood grain transfer film / paper comprises a substrate layer and an ink layer from bottom to top; the ink layer comprises a wood thorn layer and a wood flesh layer; the wood flesh layer is coated on the substrate layer; the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer or embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer and the wood flesh layer is 5 to 30. In the scheme of the present invention, the wood thorn layer and the wood flesh layer are respectively made of inks with different light haze and different colors. After thermal transfer treatment, the ink layer is transferred to the surface of the substrate, and a 3D visual effect can be formed on the surface of the substrate, with high simulation, and the preparation method is simple and easy to operate.

Description

Technical Field

[0001] The invention relates to the field of thermal transfer films / papers, and mainly to a wood grain transfer film / paper and a preparation method thereof, a transfer method and a wood grain substrate. Background Art

[0002] Thermal transfer film / paper is a medium material of thermal transfer process. Thermal transfer decoration process is a process of transferring the decorative pattern on the thermal transfer to the surface of decorative building materials by heating the thermal transfer film / paper once to form a high-quality decorative film / paper. In the thermal transfer process, the protective layer and the pattern layer are separated from the paper by the combined effect of heat and pressure, and the pattern layer penetrates into the surface of the substrate and is colored.

[0003] The existing metal (aluminum alloy, stainless steel, steel plate) products on the market, such as window frames, sliding door cabinets, anti-theft doors, etc., are all single-color on the surface and are not beautiful enough. Decorative patterns can be transferred on the surface of decorative building materials to form exquisite patterns with better decorative effects. In addition, general thermal transfer films / papers are flat films / papers with smooth surfaces. Wood grain can be transferred on the surface of building materials to form simulated wood with good decorative properties, but the simulation is not enough and only has a simple mirror pattern effect. The current preparation method of wood grain decorative panels with three-dimensional effects is generally achieved through UV printing, but this method is efficient and low-cost.

[0004] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0005] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a wood grain transfer film / paper and a preparation method thereof, a transfer method and a wood grain substrate, aiming to solve the problem that the existing wood grain transfer film / paper has insufficient wood grain simulation.

[0006] The technical solution of the present invention is as follows:

[0007] A wood grain transfer film / paper, which comprises, from bottom to top, a substrate layer and an ink layer; the ink layer comprises a wood thorn layer and a wood flesh layer; the wood flesh layer is coated on the substrate layer; the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer or embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer and the wood flesh layer is 5~30.

[0008] The wood grain transfer film / paper, wherein the wood flesh layer is made of thermal transfer sublimation ink, and the wood thorn layer is made of non-thermal transfer sublimation ink.

[0009] The wood grain transfer film / paper, wherein the substrate layer is paper or plastic film.

[0010] The wood grain transfer film / paper, wherein the substrate layer is paper, and the wood grain transfer film / paper further comprises a release layer; the release layer is arranged between the substrate layer and the ink layer.

[0011] In the wood grain transfer film / paper, the height of the wood thorn layer is 80-120 μm, and the height difference between the wood flesh layer and the wood thorn layer is 10-60 μm.

[0012] A wood grain substrate, wherein an ink layer is attached to the wood grain substrate; the wood grain substrate is a metal substrate; the ink layer includes a wood thorn layer and a wood flesh layer, the wood flesh layer is attached to the surface of the substrate, the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer or embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer and the wood flesh layer is 5~30.

[0013] The wood grain substrate, wherein the wood flesh layer is made of thermal transfer sublimation ink, and the wood thorn layer is made of non-thermal transfer sublimation ink.

[0014] The wood grain substrate is an aluminum alloy profile, a stainless steel profile or a steel plate.

[0015] A method for preparing the wood grain transfer film / paper as described above, comprising the following steps:

[0016] Step A: Select a cylindrical gravure roller engraved with a wood grain pattern according to the wood grain plate;

[0017] Step B: setting the cylindrical gravure rollers on the gravure printing machine according to the color sequence and pouring the corresponding inks respectively;

[0018] Step C: adjusting the ink viscosity to between 15 seconds and 30 seconds, the bellows temperature of the gravure printing press to between 70° C. and 140° C., and the production speed of the gravure printing press to between 50 m / min and 200 m / min;

[0019] Step D: Start color printing and print the wood grain pattern on the substrate layer;

[0020] Step F: Rewind and complete printing.

[0021] A transfer method using the wood grain transfer film / paper as described above, comprising the following steps:

[0022] Spraying powder coating on metal substrate surface;

[0023] Wrapping the wood grain transfer film / paper on a metal substrate;

[0024] Evacuate the vacuum to a negative pressure of 0.1-0.8 mPa, raise the temperature to 170-210°C, and maintain for 15-30 minutes;

[0025] Peel off the backing layer.

[0026] Beneficial effects: The wood grain transfer film / paper of the present invention, wherein the wood thorn layer and the wood flesh layer are respectively made of inks with different light haze and colors, with a light haze difference of 5-30, the wood flesh adopts thermal transfer sublimation ink with sublimation permeability, and the wood thorn adopts non-thermal sublimation transfer ink with impermeability. After thermal transfer treatment, the ink layer is transferred to the surface of the substrate, which can form a 3D visual effect on the product surface with high simulation degree and can save natural wood; and the preparation method is simple and easy to operate, and only the printing plate roller and the ink color need to be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the cross-sectional structure of the wood grain transfer film / paper of the present invention.

[0028] Figure 2 It is a schematic diagram of the structure of the wood grain transfer film / paper ink layer of the present invention.

[0029] Figure 3 It is a schematic diagram of the effect of transferring the wood grain transfer film / paper of the present invention onto a metal aluminum plate.

[0030] Figure 4 It is a schematic diagram of the effect of transferring the wood grain transfer film / paper of the present invention onto a metal aluminum plate.

[0031] Figure 5 It is a schematic diagram of the effect of transferring the wood grain transfer film / paper of the present invention onto a metal aluminum plate. DETAILED DESCRIPTION

[0032] The present invention provides a wood grain transfer film / paper and a preparation method thereof, a transfer method and a wood grain substrate. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] The present invention provides a wood grain transfer film / paper, combined with Figure 1 and Figure 2As shown, from bottom to top, it includes a substrate layer 1 and an ink layer 3; the ink layer 3 includes a wood thorn layer 32 and a wood flesh layer 31; the wood flesh layer 31 is coated on the substrate layer 1; the wood thorn layer 32 is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer 31 or embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer 32 and the wood flesh layer 31 are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer 32 and the wood flesh layer 31 is 5-30. The wood flesh layer refers to the bottom layer of the wood grain, which is equivalent to the stem of the wood; the wood thorn layer refers to the surface layer of the wood grain, which is equivalent to the stripes or particles protruding on the surface of the stem. The light haze and color of the wood thorn layer 32 and the wood flesh layer 31 are set according to the real surface effect of the wood surface. The color and light haze of the wood thorn layer 32 and the wood flesh layer 31 on the same piece of wood will also change with the different positions of the wood grain. Taking simple wood grain as an example, if the wood flesh layer 31 is made of matte or high-gloss light beige ink, and the wood thorn layer 32 is made of matte gray ink, the original wood grain is prepared; or if the wood flesh layer 31 is made of matte black ink, and the wood thorn layer 32 is made of matte or high-gloss gold ink, the golden nanmu wood grain is prepared. In the scheme of the present invention, by coating inks of different light haze and different colors in the ink layer 3, after thermal transfer treatment, the pattern layer is transferred to the surface of the substrate, a 3D visual effect can be formed on the product surface with high simulation.

[0034] like Figure 3 As shown, the wood thorn layer 32 is made of matte gray ink, and the wood flesh layer 31 is made of high-gloss beige ink, which has a 3D visual effect and a strong three-dimensional sense. More preferably, an appropriate amount of filler can be filled in the matte ink to produce different gloss and height, so that the three-dimensional effect is better. Among them, the substrate layer 1 can be paper or plastic film. Preferably, the height of the wood thorn layer is 80~120μm, and the height difference between the wood flesh layer and the wood thorn layer is 10~60μm. By matching different heights, a high simulation effect is achieved. Among them, the height here refers to the thickness of the ink of the wood thorn layer or the wood flesh layer.

[0035] When the substrate layer 1 is paper, the wood grain transfer film / paper further comprises a release layer 2, and the release layer 2 is arranged between the substrate layer 1 and the ink layer 3; in this way, the ink layer 3 is attached to the substrate layer 1 through the release layer 2, and after heating treatment, the ink layer 3 is separated from the substrate layer 1.

[0036] Preferably, the wood flesh layer 31 is made of thermal transfer sublimation ink, and the wood grain transfer film / paper is closely contacted with the substrate. Under the control of a certain temperature, pressure and time, the thermal transfer sublimation ink is sublimated in a gas phase state from the wood grain transfer film / paper to the substrate, and penetrates into the interior of the substrate and the interior of the wood thorn layer 32 through the gas phase sublimation diffusion effect, thereby achieving the purpose of coloring, and the three-dimensional effect is better. The wood thorn layer 32 needs to be made of non-thermal transfer sublimation ink. The wood thorn layer 32 is made of adhesive ink. The adhesive ink can be directly adhered to the surface of the substrate and can be made of different resins. Since the wood thorn layer ink is made of non-permeable non-thermal sublimation transfer ink, unlike thermal sublimation transfer ink, the wood thorn layer will remain on the surface of the substrate, forming a visual three-dimensional effect on the substrate. The inks used in the wood thorn layer 32 and the wood flesh layer 31 are all commercially available inks, which will not be repeated here.

[0037] The wood grain transfer film / paper provided by the present invention has a simple structure and a simple and easy-to-operate preparation method. By engraving wood grain on a printing plate roller, an ink layer 3 is printed on a substrate layer 1 to form a wood flesh layer 31 and a wood thorn layer 32, so that the prepared wood grain transfer film / paper has a high degree of simulation after transfer on a substrate (aluminum, steel and other metal materials), and can form a 3D three-dimensional wood grain effect in a plane, as well as a micro-height feel effect. The wood grain transfer film / paper can be used for hot stamping transfer of substrates of various materials.

[0038] The present invention also provides a method for preparing the wood grain transfer film / paper, which may include the following steps:

[0039] Step A: Select a cylindrical gravure roller engraved with a wood grain pattern according to the wood grain plate;

[0040] Step B: setting the cylindrical gravure rollers on the gravure printing machine according to the color sequence and pouring the corresponding inks respectively;

[0041] Step C: Adjust the ink viscosity to between 15 seconds and 30 seconds (cup No. 3), the bellows temperature of the gravure printing press to between 70°C and 140°C, and the production speed of the gravure printing press to between 50 m / min and 200 m / min;

[0042] Step D: Start color printing and print the wood grain pattern on the substrate layer;

[0043] Step F: The finished product is rolled up and printing is completed.

[0044] In the above preparation method, according to different wood species and different wood grain colors, different combinations of carving depths are used to achieve a high simulation effect. Specifically, the preparation method of the cylindrical gravure roller in step A includes the following steps:

[0045] Select the wood grain board and scan it;

[0046] Modify the wood grain board image: remove wood eyes, adjust color, etc., to make the wood grain pattern continuous and beautiful;

[0047] Plate making: According to the wood grain pattern, engraving or etching into a gravure plate to make a cylindrical gravure roller with a wood grain pattern.

[0048] The color sequence of step B is specifically to enlarge the picture of the wood grain board, separate the colors of each point in the picture, and confirm the color sequence of each point. Since the wood thorn layer is distributed on the surface of the wood flesh layer or embedded in the wood flesh layer or buried under the wood flesh layer, the ink of the wood thorn layer can be placed on any plate between the first or the bottom printing plate, and is set according to the actual picture of the wood grain board. According to the color sequence, the corresponding cylindrical gravure roller and ink are prepared, and the wood grain pattern is printed on the substrate layer layer by layer through color printing, and the wood flesh layer and the wood thorn layer are gradually formed.

[0049] By adjusting the peeling properties of the wood grain layer resin, a release agent may be used or not. If the wood grain transfer film / paper further includes a release layer 2, the method for preparing the wood grain transfer film / paper further includes the following steps:

[0050] Step B1: Pour the release agent into the first color sequence of the gravure printing machine.

[0051] The present invention also provides an application of the wood grain transfer film / paper, providing a wood grain substrate, on which the above ink layer is attached; the ink layer includes a wood thorn layer and a wood flesh layer, the wood flesh layer is attached to the surface of the substrate, the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer or embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors. The wood grain substrate is a metal substrate, such as an aluminum alloy profile, a stainless steel profile, a steel plate, etc.

[0052] The present invention also provides a method for transferring the wood grain transfer film / paper, comprising the following steps:

[0053] Spraying powder coating on metal substrate surface;

[0054] Wrapping the wood grain transfer film / paper on a metal substrate;

[0055] Evacuate the vacuum to a negative pressure of 0.1-0.8 mPa, raise the temperature to 170-210°C, and maintain for 15-30 minutes;

[0056] Peel off the backing layer.

[0057] Specifically, by spraying powder coating, the ink layer can be well attached to the metal substrate. The powder coating is a transfer powder coating, which can have different light haze and different colors. In the method of the present invention, powder coatings of different colors and light haze are selected according to the pattern requirements of the wood grain board. Figure 4 and Figure 5 As shown, the actual effect of spraying powder coatings of different colors and light haze on the surface of aluminum profiles and transferring with the same wood grain transfer film / paper. Therefore, by selecting powder coatings of different colors and light haze, the wood grain pattern on the metal substrate can also be adjusted. Regarding the transfer time, it can be appropriately adjusted according to the size of the transfer area, the thickness of the substrate, etc.

[0058] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A wood grain transfer film / paper, characterized in that: The invention comprises a substrate layer and an ink layer from bottom to top; the ink layer comprises a wood thorn layer and a wood flesh layer; the wood flesh layer is coated on the substrate layer; the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, embedded in the wood flesh layer or buried under the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer and the wood flesh layer is 5-30; The wood flesh layer is made of thermal transfer sublimation ink, and the wood thorn layer is made of non-thermal transfer sublimation ink; The height of the wood thorn layer is 80~120μm, and the height difference between the wood flesh layer and the wood thorn layer is 10~60μm; The wood thorn layer is made of ink with adhesiveness; The method for preparing the wood grain transfer film / paper comprises the following steps: Step A: Select a cylindrical gravure roller engraved with a wood grain pattern according to the wood grain plate; Step B: setting the cylindrical gravure rollers on the gravure printing machine according to the color sequence and pouring the corresponding inks respectively; Step C: adjusting the ink viscosity to between 15 seconds and 30 seconds, the bellows temperature of the gravure printing press to between 70° C. and 140° C., and the production speed of the gravure printing press to between 50 m / min and 200 m / min; Step D: Start color printing and print the wood grain pattern on the substrate layer; Step F: Rewind and complete printing; The transfer method of the wood grain transfer film / paper comprises the following steps: Spraying powder coating on metal substrate surface; Wrapping the wood grain transfer film / paper on a metal substrate; Evacuate the vacuum to a negative pressure of 0.1-0.8 mPa, raise the temperature to 170-210°C, and maintain for 15-30 minutes; Peel off the substrate layer.

2. The wood grain transfer film / paper according to claim 1, characterized in that: The substrate layer is paper or plastic film.

3. The wood grain transfer film / paper according to claim 2, characterized in that: The substrate layer is paper, and the wood grain transfer film / paper further comprises a release layer; the release layer is arranged between the substrate layer and the ink layer.

4. A wood grain substrate, characterized in that: It is formed by transfer printing using the wood grain transfer film / paper as described in any one of claims 1 to 3; an ink layer is attached to the wood grain substrate; the wood grain substrate is a metal substrate; the ink layer includes a wood thorn layer and a wood flesh layer, the wood flesh layer is attached to the surface of the substrate, the wood thorn layer is composed of a plurality of strip-shaped or granular wood grains, distributed on the surface of the wood flesh layer or embedded in the wood flesh layer; the wood thorn layer and the wood flesh layer are made of inks with different light haze and different colors; the light haze difference between the wood thorn layer and the wood flesh layer is 5~30.

5. The wood grain substrate according to claim 4, characterized in that: The wood flesh layer is made of thermal transfer sublimation ink, and the wood thorn layer is made of non-thermal transfer sublimation ink.

6. The wood grain substrate according to claim 4, characterized in that: The wood grain printing substrate is an aluminum alloy profile, a stainless steel profile or a steel plate.

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