A concave patterned color scraping decorative film and a preparation method thereof

Abstract

The present application relates to a kind of embossed pattern scraping color decorative film and preparation method in the field of decorative film, including skin feeling function layer, pattern development layer, support reinforcing layer and coloring enhancement layer, skin feeling function layer, pattern development layer and support reinforcing layer are integrated structure by hot pressing composite, each layer bonding surface is equipped with micron level gas guide groove, gas guide groove is parallelly arranged along the extension direction of concave line, the surface 60 of decorative film Gloss is less than 3GU, pencil hardness is greater than 1H, and the profile edge of concave line and the texture interval difference of printing pattern layer is 0.1-0.5mm, give decorative film excellent stereoscopic visual effect and physical performance. The concave line structure in skin feeling function layer is directly formed on the surface of skin feeling coating, avoids the problem of interlayer misplacement caused by traditional composite embossing, ensures that the concave line profile is clear, the peeling strength between layers is high, and the combination is more closely, and the bonding surface between layers has no bubble residue.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of decorative film, in particular to a concave pattern scraping color decorative film and a preparation method. BACKGROUND

[0002] In the field of home decoration and industrial decoration, decorative materials such as ceiling, wall protection plate, cabinet surface, and floor surface widely use PVC-based decorative film as surface coating. Such decorative film needs to have aesthetic, wear resistance and environmental protection, and not only simulates the texture of natural stone, wood grain and other materials, but also meets the needs of industrial production. Traditional decorative film mostly uses single-layer printing combined with surface embossing process, or realizes basic functions through multi-layer composite structure, but there are obvious limitations in the presentation of three-dimensional effect, interface bonding strength and surface durability.

[0003] 1. The existing decorative film has the following defects in the design of layered composite structure: the traditional embossing process is usually carried out after the coating is completely cured, and high-temperature embossing can easily cause the coating to soften and deform, resulting in poor consistency of the concave depth and low quality. The composite process mostly uses one-time high-temperature and high-pressure forming, and bubbles are easily generated between the layers, the bonding strength between the layers is insufficient, the surface treatment process is single, the color ink filling rate is low, and the combination with the substrate is not firm.

[0004] 2. The existing decorative film manufacturing process has the following defects: the embossing process is usually carried out after the coating is completely cured, and high-temperature embossing can easily cause the coating to soften and deform, resulting in poor consistency of the concave depth and low quality. The composite process mostly uses one-time high-temperature and high-pressure forming, and bubbles are easily generated between the layers, the bonding strength between the layers is insufficient, the surface treatment process is single, the color ink filling rate is low, and the combination with the substrate is not firm. SUMMARY

[0005] In order to overcome the deficiencies of the prior art, the present application provides a concave pattern scraping color decorative film, which can effectively solve the technical problems of unclear embossing and easy generation of bubbles inside.

[0006] The technical solution adopted by the present application to solve its technical problems is:

[0007] A concave pattern scraping color decorative film, comprising the following structure layers:

[0008] The skin feeling functional layer is composed of a transparent PVC film and a skin feeling coating, the skin feeling coating is directly coated on the surface of the transparent PVC film, and the side of the skin feeling coating away from the transparent PVC film is formed with continuous concave patterns with a depth of 0.1-0.5mm through embossing process;

[0009] Pattern development layer: composed of PVC base film and printed pattern, the PVC base film is arranged below the skin feeling functional layer, the printed pattern forms the basic decorative texture on the surface of the PVC base film by intaglio printing, and the texture of the printed pattern and the running direction of the concave groove are not overlapped, and the planar projection distance is 0.1-0.8mm;

[0010] Supporting and reinforcing layer: including a hard PVC base material layer, the hard PVC base material layer is located below the pattern development layer, and the Shore hardness thereof is 70-90HA;

[0011] Coloring enhancement layer: composed of a UV-cured color ink layer filled in the concave groove, the side wall of the concave groove is provided with a transition zone of 0.01-0.05mm, the UV-cured color ink layer filled in the transition zone is formed with a gradient edge, and the surface of the color ink layer is 0.05-0.2mm lower than the plane of the skin feeling coating layer;

[0012] The skin feeling functional layer, the pattern development layer and the supporting and reinforcing layer are formed into an integrated structure through hot pressing, the bonding surfaces of the layers are formed with micron-level air guide grooves through mold pressing, the air guide grooves are preliminarily formed under the condition of 120-140℃ and 2-4MPa for 10-20 seconds, the air guide grooves are arranged in parallel along the extension direction of the concave groove, the surface 60° glossiness of the decorative film is less than 3GU, the pencil hardness is greater than 1H, and the distance difference between the profile edge of the concave groove and the texture of the printed pattern layer is 0.1-0.5mm.

[0013] Further, the supporting and reinforcing layer further comprises a foamed PVC intermediate layer, the foamed PVC intermediate layer is located between the hard PVC base material layer and the PVC base film, the foaming ratio of the foamed PVC intermediate layer is 1.5-3 times, and the thickness is 0.2-0.6mm.

[0014] Further, the foamed PVC intermediate layer is added with a flame retardant, the flame retardant is a compound of aluminum hydroxide and a phosphorus-based flame retardant, and the addition amount is 15-25wt%.

[0015] Further, the skin feeling coating layer is made of an organic silicon modified polyurethane resin, the surface thereof is treated by electron beam irradiation to form a microporous structure, the micropore diameter is 5-20μm, and the porosity is 15-30%.

[0016] Further, the skin feeling functional layer is provided with an anti-ultraviolet functional layer, the anti-ultraviolet functional layer is made of a composite of nano-titanium dioxide and fluorocarbon resin, the thickness is 2-8μm, and the ultraviolet blocking rate is greater than 95%.

[0017] In order to overcome the deficiencies of the prior art, the present application provides a preparation method of a concave pattern scraping decorative film, which can effectively solve the technical problems of unclear embossing and insufficient bonding strength.

[0018] The technical scheme adopted by the present application to solve the technical problems is:

[0019] A preparation method of a concave patterned color scraping decorative film, for producing a concave patterned color scraping decorative film, comprising the following steps:

[0020] Step S1: applying a skin-feeling coating on the surface of a transparent PVC base film, and immediately pressing a concave pattern on the surface of the semi-cured coating by a pattern roller after pre-curing the coating at 80-120°C to form a semi-cured coating layer, the depth of the concave pattern being 0.1-0.5mm, and the temperature of the pattern roller being controlled at 50-70°C;

[0021] Step S2: printing a pattern layer on the surface of the PVC base film, and forming a three-dimensional developed texture by first applying a base ink and then superimposed printing a relief ink using a double-station printing machine;

[0022] Step S3: laminating the skin-feeling functional layer, the pattern developed layer and the hard PVC base material layer, and compounding them in two stages in a hot press:

[0023] First stage: pre-pressing the bonding surfaces of the layers at 120-140°C and 2-4MPa for 10-20 seconds to preliminarily form the air guide groove; second stage: heating the hot press to 170-200°C and pressurizing to 8-15MPa for 30-90 seconds to complete the fusion bonding after laminating the layers;

[0024] Step S4: embedding the color ink into the concave pattern using an oblique angle doctor blade at a pressure of 0.3-0.8MPa, and immediately irradiating and curing the color ink using a 365nm UV light source with an energy density of 800-1500mJ / cm²;

[0025] Step 5: spraying a hydrophobic treatment agent on the surface of the color scraped skin-feeling coating, and drying the hydrophobic treatment agent by hot air at 60-80°C to form a nano hydrophobic film;

[0026] Step S6: performing electron beam extinction treatment on the surface of the compounded film with a radiation dose of 80-200kGy to form a low gloss surface with a gloss value of less than 3GU.

[0027] Further, the curing degree of the pre-cured coating in step S1 is 40-60%, the line pressure of the pattern roller is 50-120N / cm, and the concave pattern is immediately cooled to 5-10°C for shaping by spraying liquid nitrogen after the concave pattern is formed.

[0028] Further, the hydrophobic treatment agent in step S5 is a perfluoroalkylsiloxane solution, and the spraying thickness is 0.5-2.0μm.

[0029] Further, the oblique angle doctor blade in step S4 is provided with a wave-shaped microstructure with a height of 0.1-0.3mm, and periodic pressure fluctuation with an amplitude of ±15%-25% is generated when the color ink is scraped.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] 1. Through a layered composite design consisting of a skin-feel functional layer, a pattern development layer, a support and reinforcement layer, and a color enhancement layer, the decorative film is endowed with excellent three-dimensional visual effects and physical properties. The concave structure in the skin-feel functional layer is directly formed on the surface of the skin-feel coating, avoiding the interlayer misalignment problem caused by traditional composite embossing and ensuring clear concave outlines. The non-overlapping arrangement of the pattern development layer makes the concave direction and the printed texture spatially complementary, significantly enhancing the three-dimensional simulation effect. The micron-level air guide grooves set on the bonding surfaces of each layer effectively expel interlayer gas during hot-pressing lamination, reducing residual bubble defects, improving the bonding strength between layers, and avoiding concave deformation caused by gas expansion during high-temperature lamination. The concave sidewalls are provided with transition zones and gradient edges formed by UV-cured ink layers, allowing the ink layer and the concave sidewalls to transition naturally, making the concave appearance more comfortable and eliminating the boundary burr problem of traditional scraping processes.

[0032] 2. Immediately after pre-curing to form a semi-cured coating, embossing is performed. Combined with temperature control of the embossing roller, this ensures consistent groove depth and avoids excessive softening of the coating caused by high-temperature embossing, thus improving embossing efficiency. A two-stage composite process is used to press the skin-feel functional layer, pattern development layer, and rigid PVC substrate layer together. Gradient heating and pressurization allow the air guide grooves to be initially formed and then further melted and bonded. This results in high peel strength between layers, tighter bonding, and no air bubbles remaining on the bonding surfaces between layers. A base color ink is first applied, followed by overlaying of embossed ink. Dual-station printing enhances three-dimensional development, and UV light source accelerates curing, resulting in high ink filling rate and short curing time, effectively improving production efficiency. The synergistic effect of spraying a nano-hydrophobic film and electron beam matte treatment gives the decorative film surface a low-gloss matte texture and fingerprint resistance. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0035] The numbers in the diagram are: 1-skin-feel coating, 2-transparent PVC film, 3-PVC base film, 4-rigid PVC substrate layer, 5-color ink layer, 6-embossed texture, 7-UV-resistant functional layer, 8-foamed PVC intermediate layer. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Embodiment 1

[0038] The embodiment provides a concave pattern scraping decoration film and a preparation method thereof, and specifically as follows.

[0039] The concave pattern scraping decoration film comprises a transparent PVC film 2, a skin feeling coating layer 1, a PVC base film 3 and a hard PVC substrate layer 4.

[0040] The skin feeling coating layer 1 is directly coated on the surface of the transparent PVC film 2, and the side of the skin feeling coating layer 1 away from the transparent PVC film 2 is formed with continuous concave patterns 6 with a depth of 0.2 mm through a embossing process; the PVC base film 3 is arranged below the skin feeling functional layer, a printed pattern is formed on the surface of the PVC base film 3 through intaglio printing to form a basic decorative texture, and the texture of the printed pattern and the running direction of the concave patterns 6 are arranged in a non-overlapping manner, and the planar projection distance between the two is 0.6 mm; the hard PVC substrate layer 4 is located below the pattern development layer, and the Shore hardness thereof is 70HA; the concave patterns 6 are filled with a UV curing color ink layer 5, the side wall of the concave patterns 6 is provided with a transition zone of 0.03 mm, the UV curing color ink layer 5 filled in the transition zone is formed with a gradient edge, and the surface of the color ink layer 5 is 0.1 mm lower than the plane of the skin feeling coating layer 1.

[0041] The skin feeling functional layer, the pattern development layer and the support strengthening layer are formed into an integrated structure through hot pressing, and the adhesive surfaces of the layers are provided with micron-level air guide grooves, the air guide grooves are arranged in parallel along the extension direction of the concave patterns 6, the surface gloss of the decoration film is 2.6GU at 60°, the pencil hardness is 2H, and the distance difference between the profile edge of the concave patterns 6 and the texture of the printed pattern layer is 0.1 mm.

[0042] The preparation method comprises the following steps:

[0043] Step S1, a skin feeling coating is coated on the surface of the transparent PVC base film 3, and after a semi-cured coating layer is formed through pre-curing at 100 ℃, the concave patterns 6 are pressed on the surface of the coating layer through an embossing roller, the embossing depth is 0.5 mm, the temperature of the embossing roller is controlled at 68 ℃, and the curing degree of the semi-cured coating layer is 50%-54%;

[0044] Step S2, a pattern layer is printed on the surface of the PVC base film 3, a double-station printing machine is used to coat a base ink first, and then a relief ink is superimposed to form a three-dimensional development texture;

[0045] Step S3, the skin feeling functional layer, the pattern development layer and the hard PVC substrate layer 4 are laminated, and the lamination is completed in two stages in a hot press: in the first stage, the adhesive surfaces of the layers are pre-pressed at 130 ℃ and 3.2 MPa for 15 seconds through the hot press to preliminarily form the air guide grooves, the groove depth of the air guide grooves is 25 μm, and the width is 0.15 mm; in the second stage, after the layers are laminated, the temperature of the hot press is increased to 185 ℃, the pressure is increased to 10.5 MPa and maintained for 60 seconds to complete the fusion bonding, and the peeling strength is greater than 11.5 N / mm.

[0046] Step S4, using a bevelled doctor blade to embed the color ink into the concave lines 6 at a pressure of 0.3-0.8 MPa, the bevelled angle of the bevelled doctor blade is 50°, immediately after the ink scraping, irradiate and cure with a 365 nm UV light source, the energy density is 1200 mJ / cm2, the curing time is 4 seconds, the color ink filling rate is greater than 99.2%, and the adhesion reaches 5B;

[0047] Step 5, spray a hydrophobic treatment agent on the surface of the skin feel coating 1 after color scraping, and dry with hot air at 60-80°C to form a nano hydrophobic film, the thickness of the nano hydrophobic film is 1.1 μm;

[0048] Step S6, the surface of the composite film is treated by electron beam extinction, the irradiation dose is 155 kGy, and the surface gloss less than 60° is 2.6 GU.

[0049] Example 2

[0050] The embodiment provides a concave pattern scraping decoration film and a preparation method thereof, and specifically as follows:

[0051] A concave pattern scraping decoration film, comprising a transparent PVC film 2, a skin feel coating 1, a PVC base film 3, a hard PVC substrate layer 4, a foamed PVC intermediate layer 8 and an anti-ultraviolet functional layer 7.

[0052] The skin feel coating 1 is directly coated on the surface of the transparent PVC film 2, and the side of the skin feel coating 1 away from the transparent PVC film 2 is formed with continuous concave lines 6 with a depth of 0.2 mm through a concave process, the PVC base film 3 is arranged below the skin feel functional layer, a printed pattern is formed on the surface of the PVC base film 3 through intaglio printing to form a basic decorative texture, and the texture of the printed pattern and the concave lines 6 are arranged in a non-overlapping manner, and the planar projection distance between the two is 0.6 mm, the hard PVC substrate layer 4 is located below the pattern development layer, the Shore hardness of the hard PVC substrate layer 4 is 70HA, the concave lines 6 are filled with a UV cured color ink layer 5, the concave lines 6 are provided with a transition zone of 0.03 mm, the UV cured color ink layer 5 filled in the transition zone is formed with a gradient edge, and the surface of the color ink layer 5 is 0.1 mm lower than the plane of the skin feel coating 1.

[0053] The foamed PVC intermediate layer 8 is located between the hard PVC substrate layer 4 and the PVC base film 3, the foaming ratio of the foamed PVC intermediate layer 8 is 2.1 times, the thickness is 0.42 mm, and the bending resilience is 92.5%, which is suitable for covering a curved surface with a radius greater than 50 mm, the foamed PVC intermediate layer is added with a flame retardant, the flame retardant is a compound of aluminum hydroxide and a phosphorus-based flame retardant, and the addition amount is 21 wt%.

[0054] The skin feeling functional layer, the pattern developing layer and the support reinforcing layer are combined into an integrated structure by hot pressing, the bonding surfaces of the layers are provided with micron-level air guide grooves, the air guide grooves are arranged in parallel along the extending direction of the concave lines 6, the 60° glossiness of the surface of the decorative film is 2.6GU, the pencil hardness is 2H, and the profile edge of the concave lines 6 and the texture interval difference of the printed pattern layer are 0.1mm.

[0055] The preparation method comprises the following steps:

[0056] Step S1, the skin feeling coating is coated on the surface of the transparent PVC base film 3, and immediately after the semi-cured coating layer is formed by pre-curing at 100℃, the concave lines 6 are pressed on the surface of the coating layer by using a embossing roller, the embossing depth is 0.5mm, the temperature of the embossing roller is controlled at 68℃, the curing degree of the semi-cured coating layer is 50%-54%, and the semi-cured coating layer is immediately cooled to 10℃ by spraying liquid nitrogen for shaping after embossing;

[0057] Step S2, the pattern layer is printed on the surface of the PVC base film 3, the double-station printing machine is used to coat the base ink first, and then the relief ink is superimposedly printed to form the three-dimensional marble texture, the thickness of the base ink is 10μm, and the thickness of the relief ink is 18μm;

[0058] Step S3, the skin feeling functional layer, the pattern developing layer and the hard PVC base material layer 4 are laminated, and the lamination is divided into two stages in the hot press: the first stage: the bonding surfaces of the layers are pre-pressed by the hot press at 130℃ and 3.2MPa for 15 seconds to make the air guide grooves preliminarily formed, the groove depth is 25μm, and the width is 0.15mm, the vibration platen of the hot press is used to mold the air guide grooves, the frequency is 110Hz, and the amplitude is 0.32mm; the second stage: the temperature of the hot press is increased to 185℃, the pressure is increased to 10.5MPa, and the lamination is kept for 60 seconds to complete the fusion and bonding, and the peeling strength is greater than 11.5N / mm;

[0059] Step S4, the color ink is embedded into the concave lines 6 by using the bevelled doctor blade at the pressure of 0.3-0.8MPa, the bevel angle of the bevelled doctor blade is 50°, the color ink is immediately cured by irradiating with the 365nm UV light source after the doctoring, the energy density is 1200mJ / cm², the curing time is 4 seconds, the color ink filling rate is greater than 99.2%, the adhesion reaches 5B, the interval between the printed pattern layer and the concave lines 6 is 0.32mm, the dynamic color change is generated by the light interference effect, the blade edge of the bevelled doctor blade is provided with the wave-shaped microstructure of 0.18mm, the periodic pressure fluctuation is generated during the doctoring, and the fluctuation amplitude is ±22%;

[0060] Step 5, the hydrophobic treatment agent is sprayed on the surface of the skin feeling coating 1 after the color doctoring, the nano-hydrophobic film is formed by hot air drying at 60-80℃, and the thickness of the nano-hydrophobic film is 1.1μm;

[0061] Step S6, the surface of the composite film is treated by electron beam extinction, the irradiation dose is 155kGy, and the surface less than 60° glossiness is 2.6GU.

[0062] The concave patterned color scraping decorative film and the preparation method thereof of the embodiment, the temperature of the embossing roller is controlled at 68°C±2°C, which ensures the softening degree of the coating to reduce the embossing resistance, and immediately after embossing, liquid nitrogen is sprayed for cooling, so that the semi-cured coating is rapidly shaped within 1-2 seconds, avoiding the rebound deformation of the concave pattern caused by thermal relaxation, shortening the cooling time, significantly improving the production efficiency, and adding the foamed PVC intermediate layer 8 and the anti-ultraviolet functional layer 7, the foamed PVC intermediate layer 8 makes the decorative film have excellent elastic recovery rate, and is suitable for curved substrate coating, avoiding the cracks or delamination of traditional hard materials caused by bending, the impact strength is improved to 15-25 kJ / m², the compression permanent rate is ≤5%, and long-term dynamic load can be withstood, such as the surface of the frequently opened and closed cabinet door, the foamed intermediate layer 8 can absorb the interlayer stress in the hot pressing composite process, reduce the warping deformation caused by temperature gradient, and improve the size stability of large-scale production. The ultraviolet protection layer 7 can isolate UVB / UVA radiation, inhibit the photodegradation of ink pigment, avoid the texture degradation of traditional decorative film caused by fading, the service life is 3-5 times longer than that of ordinary decorative film, and the foamed PVC intermediate layer 8 is added with a flame retardant, and is suitable for sunlight room, outdoor curtain wall and the like.

[0063] Embodiment 3

[0064] The embodiment provides a concave patterned color scraping decorative film and a preparation method thereof, which are as follows:

[0065] A concave patterned color scraping decorative film, comprising a transparent PVC film 2, a skin feeling coating layer 1, a PVC base film 3, a hard PVC substrate layer 4, a carbon fiber reinforced layer and an ultraviolet resistant functional layer. The transparent PVC film 2 has a thickness of 0.28 mm, the skin feeling coating layer 1 is coated on the surface of the transparent PVC film 2, the skin feeling coating layer 1 is made of polyurethane-silicone composite resin and has a thickness of 35 μm, the surface of the skin feeling coating layer 1 is formed with U-shaped concave patterns 6 with a depth of 0.25 mm through a embossing process, the concave patterns 6 have a bottom width of 0.6 mm and a spacing of 1.8 mm. The PVC base film 3 has a thickness of 0.18 mm, the surface of the PVC base film 3 is gravure printed with a geometric texture pattern, the thickness of the base color ink is 12 μm, the thickness of the relief ink is 20 μm, the printed texture and the plane projection spacing of the concave patterns 6 are 0.4 mm, and the optical interference stripes are formed. The hard PVC substrate layer 4 has a thickness of 0.58 mm and a Shore hardness of 82HA, the bottom surface is provided with an anti-skid rhombic convex dot array, the anti-skid rhombic convex dots have a height of 0.4 mm, a side length of 1.2 mm, a spacing of 2.5 mm and a static friction coefficient of 0.68. The carbon fiber reinforced layer is located between the hard PVC substrate layer 4 and the foaming layer, has a thickness of 0.15 mm, a length of 1.2 mm and a volume ratio of 8%, and the tensile strength is increased to 45 MPa. The concave patterns 6 are filled with UV-cured gradient color ink, the UV-cured gradient color ink is mixed with two or more colors, the gas guide grooves on the adhesive surfaces of the layers are arranged in a honeycomb shape, the gas guide grooves have a depth of 30 μm, a width of 0.12 mm and a spacing of 0.8 mm, the interlayer peeling strength after hot pressing is 12.8 N / mm, and the pencil hardness is 2H.

[0066] The preparation method comprises the following steps:

[0067] Step S1, the skin feeling coating is coated on the surface of the transparent PVC base film 3, the skin feeling coating has a viscosity of 1400 cps, is pre-cured at 105°C to a curing degree of 58%, and is pressed to form the concave patterns 6 by using a laser engraving embossing roller with a power of 50 W and a line speed of 2 m / min, the embossing depth is 0.25 mm, the roller temperature is 75°C, and the concave patterns 6 are rapidly cooled to 5°C by liquid nitrogen after embossing at a cooling rate of 60°C / s. The edge R value of the concave patterns 6 is ≤0.008 mm, the surface roughness Ra is 2.2 μm, and the touch damping coefficient is 0.35.

[0068] Step S2, a three-station printing machine is used:

[0069] The first station is used for coating conductive ink with a thickness of 8 μm and a surface resistance of 1×10³ Ω / □;

[0070] The second station is used for printing a geometric relief pattern by using UV ink containing ceramic particles with a thickness of 20 μm;

[0071] The third station is used for spraying an antistatic coating with a thickness of 3 μm and a surface resistance of 1×10 6 Ω / □.

[0072] The electrostatic decay time is ≤0.5 s, and the film is suitable for clean room environment.

[0073] Step S3, laminating the composite:

[0074] First stage: the bonding surface of each layer is pre-pressed at 135°C and 4.5MPa for 18s by a hot press, the vibration platen vibrates at a frequency of 150Hz and an amplitude of 0.25mm to form a honeycomb gas guide groove;

[0075] Second stage: after the layers are laminated, the hot press is heated to 195°C and 12MPa for final pressing for 75s, and the interface is fused and combined.

[0076] The thermal conductivity is increased to 0.85W / (m·K), and is suitable for coating of a heating base material.

[0077] Step S4, a double-stage ink scraping system is used:

[0078] The first stage is a flat-mouth scraper, the scraper pressure is 0.7MPa, and the night light color ink is filled;

[0079] The second stage is an electromagnetic oscillation scraper, the oscillation frequency is 200Hz, the amplitude is 0.1mm, the color ink is compacted, and the UV curing energy density is 1400mJ / cm².

[0080] Step 5, a hydrophobic treatment agent is sprayed on the surface of the skin feeling coating 1 after color scraping, and a nano hydrophobic film is formed after hot air drying at 60-80°C, the thickness of the nano hydrophobic film is 1.1μm;

[0081] Step S6, the surface of the composite film is subjected to electron beam extinction treatment, the irradiation dose is 155kGy, and the surface gloss less than 60° is 2.6GU.

[0082] The concave pattern scraping decoration film and the preparation method thereof of the embodiment, the addition of the chopped carbon fiber increases the tensile strength to 45MPa, which is increased by 200% compared with the pure PVC base material, and the density is only increased by 5%, from 1.42g / cm³ to 1.49g / cm³, realizing the characteristics of high strength and light quality, and being suitable for large-span decorative plates, such as suspended ceiling. The UV-cured gradient color ink can obtain more realistic patterns, such as marble, jadeite and the like.

[0083] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A debossed patterned paint decoration film, characterized by, The structure layer comprises: a skin feeling functional layer composed of a transparent PVC film and a skin feeling coating, the skin feeling coating being directly coated on the surface of the transparent PVC film, and the side of the skin feeling coating away from the transparent PVC film being formed with continuous concave lines with a depth of 0.1-0.5 mm through an embossing process; a pattern developing layer composed of a PVC base film and a printed pattern, the PVC base film being arranged below the skin feeling functional layer, the printed pattern being formed with basic decorative lines on the surface of the PVC base film through intaglio printing, and the lines of the printed pattern and the concave lines being arranged in a non-overlapping manner with a planar projection distance of 0.1-0.8 mm; a support and strengthening layer comprising a hard PVC base material layer, the hard PVC base material layer being arranged below the pattern developing layer and having a Shore hardness of 70-90 HA; a coloring and enhancing layer composed of a UV-cured color ink layer filled in the concave lines, the side wall of the concave lines being provided with a transition zone with a thickness of 0.01-0.05 mm, the UV-cured color ink layer filled in the transition zone being formed with a gradient edge, and the surface of the color ink layer being 0.05-0.2 mm lower than the plane of the skin feeling coating; the skin feeling functional layer, the pattern developing layer and the support and strengthening layer being formed into an integrated structure through hot pressing, the bonding surfaces of the layers being formed with micron-level air guiding grooves through mold pressing, the air guiding grooves being preliminarily formed under the conditions of 120-140 ℃ and 2-4 MPa for 10-20 seconds, the air guiding grooves being arranged in parallel along the extending direction of the concave lines, the surface gloss of the decorative film being less than 3 GU at 60°, the pencil hardness being greater than 1H, and the distance difference between the profile edge of the concave lines and the lines of the printed pattern layer being 0.1-0.5 mm.

2. The embossed patterned and colored decorative film according to claim 1, wherein: The support and strengthening layer further comprises a foamed PVC intermediate layer, the foamed PVC intermediate layer being arranged between the hard PVC base material layer and the PVC base film, the foamed PVC intermediate layer having a foaming ratio of 1.5-3 times and a thickness of 0.2-0.6 mm.

3. The embossed patterned and colored decorative film according to claim 2, wherein: The foamed PVC intermediate layer is added with a flame retardant, the flame retardant being a compound of aluminum hydroxide and a phosphorus-based flame retardant, and the addition amount being 15-25 wt%.

4. The embossed patterned and colored decorative film according to any one of claims 1-3, characterized in that: The skin feeling coating is made of an organic silicon modified polyurethane resin, the surface of the skin feeling coating being treated by electron beam irradiation to form a microporous structure, the micropores having a diameter of 5-20 μm and a porosity of 15-30%.

5. The embossed patterned and colored decorative film according to any one of claims 1-3, wherein: The surface of the skin feeling functional layer is provided with an anti-ultraviolet functional layer made of a composite of nano-titanium dioxide and fluorocarbon resin, the anti-ultraviolet functional layer having a thickness of 2-8 μm and an ultraviolet blocking rate of greater than 95%.

6. A method for producing a concave patterned color scraping decorative film according to claim 1, characterized in that, The method comprises the following steps: Step S1: coating a skin feeling coating on the surface of a transparent PVC base film, and immediately pressing concave lines on the surface of the coating through an embossing roller after the coating is pre-cured at 80-120 ℃ to form a semi-cured coating, the depth of the concave lines being 0.1-0.5 mm, and the temperature of the embossing roller being controlled at 50-70 ℃; Step S2: printing a pattern layer on the surface of the PVC base film, and coating a base color ink and then superimposed printing a relief ink to form a three-dimensional developing texture through a double-station printing machine; Step S3: stack the skin feel function layer, pattern developing layer and rigid PVC substrate layer, composite in two stages in the heat press: first stage: the adhesive surface of each layer is pre-pressed for 10-20 seconds under the condition of 120-140℃ and 2-4MPa in the heat press, so that the air guide groove is initially formed; second stage: after the layers are stacked, the heat press is heated to 170-200℃ and pressurized to 8-15MPa for 30-90 seconds, so that the melt combination is completed; Step S4: use the bevelled doctor blade to embed the color ink into the concave lines under the pressure of 0.3-0.8MPa, and immediately irradiate and cure under the 365nm UV light source with the energy density of 800-1500mJ / cm²; Step 5: spray the hydrophobic treatment agent on the surface of the skin feel coating after the color is scraped, and dry the nano hydrophobic film by hot air at 60-80℃; Step S6: perform the electron beam extinction treatment on the surface of the composite film with the irradiation dose of 80-200kGy, so that the low gloss surface with the gloss less than 3GU is formed.

7. The method of claim 6, wherein the method further comprises the step of: The curing degree of the pre-cured coating in step S1 is 40-60%, the line pressure of the embossing roller is 50-120N / cm, and the embossed surface is immediately cooled to 5-10℃ by spraying liquid nitrogen for setting. ​ 8. The method of claim 6, wherein the method further comprises the step of:

8. applying a release agent to the surface of the decorative film. The hydrophobic treatment agent in step S5 is a perfluoroalkylsiloxane solution, and the spraying thickness is 0.5-2.0μm.

9. A method of making an embossed patterned squeegee decoration film according to any one of claims 6-8, characterized in that: The bevelled doctor blade in step S4 is provided with the wave-shaped microstructure with the width of 0.1-0.3mm, and the periodic pressure fluctuation with the fluctuation amplitude of ±15%-25% is generated when the color is scraped.

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