EB membrane material, preparation method thereof, EB triamine veneer and preparation method of EB triamine veneer

Abstract

The invention discloses an EB membrane material which comprises a base membrane and an EB release layer formed by curing an EB coating, and the EB coating is prepared from the following raw materials in parts by weight: 40-60 parts of polyurethane acrylic resin, 20-50 parts of an acrylate monomer, 4-6 parts of a melamine acrylic monomer, 1-5 parts of organic silicon resin, 0.5-5 parts of a coupling agent and 0.1-0.5 part of an assistant. The EB film material which can be pre-cured and rolled is prepared, that is, the EB coating can be pre-cured on the base film through the electron beam curing process to prepare the EB film material, and the design of the component system and the design of the release film enable the EB film material to be subsequently compounded with other material layers only through hot-pressing curing. Therefore, downstream plate manufacturers can produce the EB veneer without purchasing EB curing equipment, and the production cost of the EB veneer is reduced; the invention further discloses a preparation method of the EB membrane material, an EB triamine veneer comprising the EB membrane material and a preparation method of the EB triamine veneer.

Description

Technical Field

[0001] The present invention belongs to the technical field of plate materials, and in particular relates to an EB film material and a preparation method thereof. The present invention also relates to an EB triamine decorative panel comprising the EB film material and a preparation method thereof. Background Art

[0002] With the rapid economic development and the improvement of living standards, people have higher and higher requirements on decoration materials. They must not only be beautiful and elegant, but also environmentally friendly and fashionable, and reflect personalized characteristics. In recent years, EB decorative panels have been very popular due to their unique advantages.

[0003] EB decorative panels are a product that uses EB electron beams to cure the surface coating of the board. The electron beam flow induced by the EB electron beam after being accelerated in a high-voltage electric field is an energy carrier with ultra-high energy. Its energy is extremely high and can be instantly cured in 5 milliseconds, thus forming a functional coating with an excellent curing degree of 100% and without any harmful substances emitted. Most EB decorative panels have better decorative effects and excellent physical and chemical properties.

[0004] Patent document with announcement number CN115746693B discloses a self-repairing decorative board with a self-repairing EB film layer, which is composed of a substrate, a resin layer, a texture layer and a self-repairing EB film layer stacked in sequence, and the self-repairing EB film layer is obtained by EB radiation curing.

[0005] The above-mentioned existing technology is to apply a coating on the board facing layer and then perform EB curing. This is currently the most commonly used production method for EB decorative panels. This production method requires multiple coating constructions, with many and complex processes and high production costs. In addition, EB curing equipment is expensive, and the purchase, use and maintenance costs are all high. As a result, it is difficult for downstream processing plants in the board production and processing chain to bear the cost, and therefore EB decorative panels are difficult to promote and popularize on a large scale.

[0006] The applicant and the inventor have been deeply involved in the field of sheet metal technology for many years. As the source manufacturer of the sheet metal industry, one of their main businesses is to provide raw materials, primary products, semi-finished products, etc. to downstream manufacturers, who then process and modify them to make finished sheet metal products. The applicant collected feedback from downstream manufacturers and found that most of them were interested in producing and processing EB veneer panels, but their own equipment did not support it, and they could not afford the cost of purchasing, using and maintaining BE curing equipment.

[0007] Based on the above situation, the present invention aims to develop semi-finished products of EB decorative panels and make their subsequent processing and plate making procedures not require the use of electron beam curing equipment, thereby reducing the equipment conditions required for the production of EB decorative panels and promoting the popularization and use of EB decorative panels, which has significant market prospects and practical significance. Summary of the invention

[0008] In view of the problems in the related technology, the present invention proposes an EB film material and a preparation method thereof to overcome the above-mentioned technical problems existing in the existing related technology. The present invention also discloses an EB triamine decorative panel including the EB film material and a preparation method thereof.

[0009] The technical solution of the present invention is achieved in this way:

[0010] An EB film material comprises a base film and an EB release layer attached to the surface of the base film;

[0011] The EB release layer is formed by curing the EB coating, and the EB coating contains the following raw materials in parts by weight: 40 to 60 parts of polyurethane acrylic resin, 20 to 50 parts of acrylate monomer, 4 to 6 parts of melamine acrylic monomer, 1 to 5 parts of silicone resin, 0.5 to 5 parts of coupling agent and 0.1 to 0.5 parts of auxiliary agent.

[0012] The present invention develops and designs a component system of EB coating to produce a pre-curable and rollable EB film material, that is, a source manufacturer with EB equipment first pre-cures the EB coating on a base film through an electron beam curing process to produce the EB film material. The design of the component system and the release film design enable the EB film material to be subsequently composited with other material layers only by hot pressing curing, thereby enabling downstream panel manufacturers to produce EB decorative panels without purchasing EB curing equipment, thereby reducing the production cost of EB decorative panels and promoting the popularization and use of EB decorative panels.

[0013] Preferably, the viscosity of the polyurethane acrylic resin is 1000-10000 mPa·s (25° C.), and it has good fluidity and stability, and also has the characteristics of high adhesion, strong weather resistance, and fast curing reaction speed.

[0014] Preferably, the viscosity of the acrylate monomer is 30 to 500 mPa·s (25° C.), which not only acts as an active diluent to improve the dispersion of the raw materials, but also improves the adhesion of the EB coating to the substrate film. Controlling the viscosity can make the EB coating of the present invention have a faster curing speed.

[0015] Preferably, the acrylate monomer is one or more of 3,3,5-trimethylcyclohexyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, isooctyl acrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, cyclotrimethylolpropane methyl ether acrylate, dipentaerythritol hexaacrylate, dipropylene glycol diacrylate, isobornyl acrylate, acryloyl morpholine, isobornyl methacrylate and tetrahydrofurfuryl acrylate in any proportion.

[0016] Preferably, the melamine acrylic monomer is a product having a carbon-nitrogen double bond prepared by a condensation reaction between at least one amino group of melamine and an organic substance containing at least one aldehyde group.

[0017] The organic matter containing aldehyde groups is one or more of p-hydroxybenzaldehyde, o-hydroxybenzaldehyde, m-hydroxybenzaldehyde, 2,3-dihydroxybenzaldehyde or 3,4-dihydroxybenzaldehyde.

[0018] More preferably, the structure of the melamine acrylic monomer is as follows:

[0019]

[0020] The melamine acrylic monomer can perfectly blend the EB release layer with the amine-formaldehyde resin layer of the impregnated decorative paper described below, thereby improving the coating adhesion of the EB release layer and also improving other properties of the EB release layer.

[0021] Preferably, the main component of the silicone resin is polydimethylsiloxane, which has a good separation effect due to its small intermolecular force and low surface tension, ensuring that the EB release layer and the base film are completely peeled off after lamination, and at the same time can improve the high temperature resistance and weather resistance of the EB release layer.

[0022] The coupling agent is methacryloxypropyltrimethoxysilane (KH-570), which improves the dispersibility and adhesion of various preparation raw materials in the resin system, thereby improving the adhesion performance and compatibility of the resin system.

[0023] Preferably, the additives include wear-resistant and scratch-resistant agents, leveling agents, defoaming agents, antibacterial and mildew-proof agents, ultraviolet absorbers and flame retardants, and the mass ratio of each component is 1-2: 0.5-1.5: 0.5-1.5: 0.5-1.5: 0.5-1.5: 0.5-1.5.

[0024] The wear-resistant and scratch-resistant agent is nano-silicon dioxide, which can significantly improve the wear-resistant and scratch-resistant performance of the EB release layer of the present invention, and at the same time improve the high-temperature resistance of the EB release layer, so that the EB release layer can maintain stable performance under high-temperature pressing and effectively compound with the amine-formaldehyde resin layer on the surface of the impregnated decorative paper described below.

[0025] The leveling agent is a polysiloxane-polyether copolymer, and its main function is to wet the base film.

[0026] The main component of the defoamer is polyether-modified polysiloxane, and its main function is to reduce the surface tension in the EB coating, inhibit the generation of foam or eliminate the generated foam.

[0027] The antibacterial and mildewproof agent is nano silver, which gives the EB release layer of the present invention antibacterial and mildewproof functions.

[0028] The ultraviolet absorber is benzotriazole, which improves the light stability of the EB release layer, can effectively prevent or weaken the damage of ultraviolet rays to the color, and improves the weather resistance and light resistance of the EB release layer of the present invention.

[0029] The flame retardant is a phosphorus-nitrogen flame retardant suitable for coatings. The particle size of the selected flame retardant should be ≤10 μm, which can effectively improve the flame retardant effect of the EB release layer while avoiding affecting the appearance of the EB release layer as a finish.

[0030] Based on the resin system, a variety of additives are rationally designed to improve the various properties of the EB release layer, so that the board product using the EB release layer of the present invention as a finishing surface has the advantages of antibacterial and mildew-proof, flame retardant, etc., and at the same time has excellent weather resistance and light resistance, and further makes up for the shortcomings of the EB finishing surface that the wear resistance and scratch resistance are slightly insufficient, and can be comparable to melamine boards.

[0031] Preferably, the base film is a polymer film that can withstand a high temperature of at least 195°C.

[0032] More preferably, the polymer film is any one of a polyethylene terephthalate film, a polyimide film, and a polytetrafluoroethylene film.

[0033] Preferably, the base film has a thickness of 0.1-0.3 mm and a width of ≥1250 mm.

[0034] Preferably, the thickness of the EB release layer is 30-100 μm.

[0035] The present invention also discloses a method for preparing the above EB film material, comprising the following steps:

[0036] (A-1) mixing the raw materials for preparing the EB coating uniformly, and then coating the mixture on the surface of the base film to prepare a film material;

[0037] (A-2) The film material is electron beam cured in an oxygen-free environment, with the absorbed dose set to 30-100 kGy, the energy set to 100-400 keV, and the beam current set to 50-100 mA, thereby obtaining an EB film material.

[0038] Specifically, the base film is a coil, and in step (A-1), the unwinding speed of the base film is 20 to 30 m / min, and the unwinding tension is 40 to 50 kg.

[0039] In order to enable the EB film of the present invention to be more smoothly and firmly compounded to the triamine paper, it is necessary to carry out targeted research and development and design of the triamine paper dipping process and the pressing process.

[0040] A method for preparing an EB triamine decorative panel comprises the following steps:

[0041] (A) preparing the EB membrane according to the above technical scheme;

[0042] (B) impregnating the base paper with urea-formaldehyde resin impregnation liquid in an amount of 80-100% relative to the weight of the base paper, and performing a first drying at 120-140° C. for 20-30 seconds to form a urea-formaldehyde resin layer on the surface of the base paper, wherein the urea-formaldehyde resin layer is not completely cured;

[0043] (C) coating an amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 20-40% relative to the weight of the base paper, and performing a second drying at 130-150° C. for 30-40 seconds to form an amine-formaldehyde resin layer on the upper and lower surfaces of the urea-formaldehyde resin layer to obtain the impregnated decorative paper, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured;

[0044] (D) stacking the impregnated decorative paper and the EB film material on the surface of the substrate in sequence, and pressing and laminating them at a pressure of 8 to 15 MPa, a temperature of 150 to 195° C., and a time of 35 to 150 seconds, wherein the contact surface of the impregnated decorative paper and the EB release layer are fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are simultaneously and completely cured;

[0045] (E) After the hot pressing is completed, the base film is torn off the plate to obtain an EB triamine decorative panel.

[0046] Through the step-by-step variable temperature drying, the resin system of the impregnated decorative paper is partially cured first, thereby shortening the complete curing time of the subsequent step (D) and improving the production efficiency. Secondly, free formaldehyde will be released during the drying process. The multiple drying designs with different functional layers can release free formaldehyde as much as possible, thereby reducing the formaldehyde emission of the finished product of the present invention. Finally, the step-by-step variable temperature drying can control each resin layer to have a certain fluidity before complete curing, which is conducive to forming a uniform, continuous and firmly pressed film layer, thereby better controlling the curing degree and volatile content of the resin.

[0047] Preferably, in step (B), the base paper has a grammage of 70 to 120 g / m 2 The base paper is impregnated with the urea-formaldehyde resin impregnation liquid at a speed of 30 to 40 m / min and a tension of 45±0.5 N, so that the urea-formaldehyde resin impregnation liquid fully penetrates the base paper.

[0048] Preferably, in step (B), the urea-formaldehyde resin impregnation solution comprises melamine formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5 to 4:1;

[0049] The molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.8-1, which effectively reduces the content of free formaldehyde in the urea-formaldehyde resin, thereby achieving the effect of low formaldehyde release.

[0050] The impregnated decorative paper prepared in step (C) has an impregnation amount of 100-140%, a volatile matter content of 5-7%, a pre-curing degree of 30-50%, and a formaldehyde release of ≤0.3 mg / L.

[0051] Preferably, in step (D), a flat steel plate is provided for pressing and laminating operation, and the flat steel plate is in contact with the outer film surface of the base film of the EB membrane material;

[0052] The thickness of the flat steel template is 4.5-6 mm, and the glossiness does not exceed 20 GS.

[0053] Preferably, in step (D), the substrate is any one of fiberboard, particleboard, plywood, and oriented strand board, with a thickness of 5 to 25 mm, and the surface of the substrate should be flat and free of pits.

[0054] Preferably, in step (E), the board from which the base film is removed is cooled to at least 40° C., and then a protective film is applied to protect the board surface to prevent the board surface from being scratched or damaged during handling or transportation.

[0055] The EB triamine decorative panel prepared by the above preparation method comprises a substrate, at least one surface of the substrate is compounded with an impregnated decorative paper and the EB release layer in sequence, and the EB release layer is in contact with the impregnated decorative paper and pressed and compounded;

[0056] The impregnated decorative paper comprises base paper, a urea-formaldehyde resin layer and an amine-formaldehyde resin layer, and the upper and lower surfaces of the base paper are respectively covered with the urea-formaldehyde resin layer and the amine-formaldehyde resin layer in sequence.

[0057] Based on the research and development and design of the EB membrane material of the present invention, the production process of the melamine board is specifically developed and designed, which can effectively improve the wear and scratch resistance of the finished board product. The EB triamine decorative panel prepared by the present invention combines the advantages of EB curing and melamine board, has a super matte skin feel, strong wear and scratch resistance and weather resistance, high surface hardness, easy cleaning, environmental protection and health, good decorative effect, and is particularly suitable for making furniture such as door panels.

[0058] Preferably, the thickness of the impregnated decorative paper is 0.1-0.2 mm.

[0059] Preferably, the outer surface of the EB release layer is covered with a protective film, and the protective film is a polypropylene film (PP film).

[0060] The present invention discloses one of the technical solutions, that is, the upper and lower surfaces of the substrate are respectively and sequentially compounded with the impregnated decorative paper, the EB release layer and the protective film, that is, a double-sided decorative panel.

[0061] The technical solution of the present invention complies with the concept of environmental protection. The EB release layer is cured by electron beam without the need for a photoinitiator, thus avoiding potential safety hazards such as photoinitiator residue and migration caused by traditional curing methods. The curing speed is fast, the energy efficiency is high, the curing is thorough, and there is no solvent volatilization. The formaldehyde emission of the impregnated decorative paper is ≤0.3 mg / L, which complies with the national environmental protection development strategy of carbon reduction and emission reduction. On the other hand, the overall production process has the advantages of high efficiency, energy saving, economy, and environmental friendliness, has a high curing rate and production efficiency, can reduce energy consumption, meets the industry's requirements for energy conservation and environmental protection, meets the national requirements for carbon reduction and emission reduction, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the structure of the EB membrane material of the present invention;

[0063] Figure 2 for Figure 1 A magnified image of point A;

[0064] Figure 3 It is a schematic diagram of the structure of the impregnated decorative paper of the present invention;

[0065] Figure 4 for Figure 3 The enlarged view of point B;

[0066] Figure 5 It is a schematic diagram of the pressing process of the EB triamine decorative panel of the present invention;

[0067] Figure 6 for Figure 5 Enlarged view of point C.

[0068] Reference numerals

[0069] V, EB triamine veneer panel;

[0070] 1. EB film material; 101. base film; 102. EB release layer;

[0071] 2. impregnated decorative paper; 201. amine-formaldehyde resin layer; 202. urea-formaldehyde resin layer; 203. base paper;

[0072] 3. Base material;

[0073] 4. Protective film. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0076] Example 1

[0077] A method for preparing an EB triamine decorative panel comprises the following steps:

[0078] (A) Preparation of EB membrane

[0079] -Prepare basement membrane:

[0080] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polyethylene terephthalate film with a thickness of 0.1 mm and a width of 1250 mm.

[0081] -Prepare EB coating:

[0082] The preparation comprises the following raw materials in parts by weight:

[0083] 40kg polyurethane acrylic resin, viscosity 10000mPa·s (25℃);

[0084] 20 kg of acrylate monomer (hydroxyethyl acrylate), viscosity 500 mPa·s (25°C);

[0085] 4kg melamine acrylic monomer, the molecular structure is as follows:

[0086]

[0087] 1kg silicone resin (main component is polydimethylsiloxane);

[0088] 0.5kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0089] 0.1kg additives:

[0090] The additives include a wear-resistant and scratch-resistant agent (nano silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether modified polysiloxane), an antibacterial and mildew-proof agent (nano silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 1:0.5:0.5:0.5:0.5:0.5 respectively.

[0091] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 30 m / min, the unwinding tension is 40 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0092] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 30 kGy, the energy is set to 100 keV, and the beam current is set to 50 mA. After curing, the film material is cut to obtain an EB film material.

[0093] Reference Figure 1 and Figure 2 The EB film material 1 prepared above includes a base film 101 and an EB release layer 102 attached to the surface of the base film 101;

[0094] The EB release layer 102 is formed by curing the EB coating, and the thickness of the EB release layer 102 is 30 μm.

[0095] (B) Prepare a weight of 70g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0096] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.8;

[0097] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 80% of the relative base paper weight, the impregnation speed is 30m / min, and the tension is 45±0.5N;

[0098] The first drying is performed at 120° C. for 20 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0099] (C) coating an amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 20% relative to the weight of the base paper, and performing a second drying at 130° C. for 30 seconds to form an amine-formaldehyde resin layer on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is obtained by cutting after cooling.

[0100] like Figure 3and Figure 4 As shown, the prepared impregnated decorative paper has an impregnation amount of 100%, a volatile matter content of 5%, a pre-curing degree of 30%, a formaldehyde emission of ≤0.3 mg / L, and a thickness of 0.1 mm.

[0101] (D) Prepare 18mm thick plywood as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0102] Reference Figure 5 The impregnated decorative paper 2 and the EB film material 1 are sequentially stacked on the upper surface of the substrate 3 and transported to the hot pressing station for assembly. A flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer film surface of the base film 101 of the EB film material 1. The thickness of the flat steel template is 4.5 mm, and the glossiness does not exceed 20GS.

[0103] The process parameters of the pressing and laminating are: pressure 8 MPa, temperature 150° C., duration 150 seconds, the contact surface of the impregnated decorative paper 2 and the EB release layer 102 are fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0104] (E) After the hot pressing, the plate is taken out, the base film 101 is torn off, the edges are trimmed and stacked, and the temperature is lowered to <40° C. A PP film as a protective film 4 is applied to the surface of the EB release layer 102 by an automatic laminating machine to obtain an EB triamine decorative panel V.

[0105] Reference Figure 6 The EB triamine decorative panel prepared above comprises a substrate 3, one surface of which is compounded with an impregnated decorative paper 2 and an EB release layer 102 in sequence, and the EB release layer 102 is in contact with the impregnated decorative paper 2 and pressed and compounded;

[0106] The impregnated decorative paper comprises a base paper 203, a urea-formaldehyde resin layer 202 and an amine-formaldehyde resin layer 201, and the upper and lower surfaces of the base paper 203 are respectively covered with the urea-formaldehyde resin layer 202 and the amine-formaldehyde resin layer 201 in sequence.

[0107] Example 2

[0108] A method for preparing an EB triamine decorative panel comprises the following steps:

[0109] (A) Preparation of EB membrane

[0110] -Prepare basement membrane:

[0111] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polyimide film with a thickness of 0.2 mm and a width of 1250 mm.

[0112] -Prepare EB coating:

[0113] The preparation comprises the following raw materials in parts by weight:

[0114] 50kg polyurethane acrylic resin, viscosity 5000mPa·s (25℃);

[0115] 35 kg acrylate monomer (acryloylmorpholine), viscosity 300 mPa·s (25°C);

[0116] 5kg melamine acrylic monomer, the molecular structure is as follows:

[0117]

[0118] 3kg silicone resin (main component is polydimethylsiloxane);

[0119] 3kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0120] 0.3kg additives:

[0121] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 1.5:1:1:1:1:1.

[0122] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 25 m / min, the unwinding tension is 45 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0123] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 65 kGy, the energy is set to 250 keV, and the beam current is set to 75 mA. After curing, the film material is cut to obtain an EB film material.

[0124] Reference Figure 1 and Figure 2 The EB film material 1 prepared above includes a base film 101 and an EB release layer 102 attached to the surface of the base film 101;

[0125] The EB release layer 102 is formed by curing the EB coating, and the thickness of the EB release layer 102 is 65 μm.

[0126] (B) Prepare a weight of 100g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0127] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.9;

[0128] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 90% of the relative base paper weight, the impregnation speed is 35m / min, and the tension is 45±0.5N;

[0129] The first drying is performed at 130° C. for 25 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0130] (C) coating amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 30% relative to the weight of the base paper, and performing a second drying at 140° C. for 35 seconds to form amine-formaldehyde resin layers on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is obtained by cutting after cooling.

[0131] like Figure 3 and Figure 4 As shown, the prepared impregnated decorative paper has an impregnation amount of 120%, a volatile matter content of 6%, a pre-curing degree of 40%, a formaldehyde emission of ≤0.3 mg / L, and a thickness of the impregnated decorative paper of 0.15 mm.

[0132] (D) Prepare a particle board with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0133] Reference Figure 5 The impregnated decorative paper 2 and the EB film material 1 are sequentially stacked on the upper surface of the substrate 3 and transported to the hot pressing station for assembly. A flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer film surface of the base film 101 of the EB film material 1. The thickness of the flat steel template is 5 mm and the glossiness does not exceed 20 GS.

[0134] The process parameters of the pressing and laminating are: pressure 12 MPa, temperature 170° C., duration 100 s, the contact surface of the impregnated decorative paper 2 and the EB release layer 102 are fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0135] (E) After the hot pressing, the plate is taken out, the base film 101 is torn off, the edges are trimmed and stacked, and the temperature is lowered to <40° C. A PP film as a protective film 4 is applied to the surface of the EB release layer 102 by an automatic laminating machine to obtain an EB triamine decorative panel V.

[0136] Reference Figure 6The EB triamine decorative panel prepared above comprises a substrate 3, one surface of which is compounded with an impregnated decorative paper 2 and an EB release layer 102 in sequence, and the EB release layer 102 is in contact with the impregnated decorative paper 2 and pressed and compounded;

[0137] The impregnated decorative paper comprises a base paper 203, a urea-formaldehyde resin layer 202 and an amine-formaldehyde resin layer 201, and the upper and lower surfaces of the base paper 203 are respectively covered with the urea-formaldehyde resin layer 202 and the amine-formaldehyde resin layer 201 in sequence.

[0138] Example 3

[0139] A method for preparing an EB triamine decorative panel comprises the following steps:

[0140] (A) Preparation of EB membrane

[0141] -Prepare basement membrane:

[0142] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polytetrafluoroethylene film with a thickness of 0.3 mm and a width of 1250 mm.

[0143] -Prepare EB coating:

[0144] The preparation comprises the following raw materials in parts by weight:

[0145] 60kg polyurethane acrylic resin, viscosity 1000mPa·s (25℃);

[0146] 50 kg acrylate monomer (isobornyl methacrylate), viscosity 30 mPa·s (25°C);

[0147] 6kg melamine acrylic monomer, the molecular structure is as follows:

[0148]

[0149] 5kg silicone resin (main component is polydimethylsiloxane);

[0150] 5kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0151] 0.5kg additives:

[0152] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 2:1.5:1.5:1.5:1.5:1.5 respectively.

[0153] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 20 m / min, the unwinding tension is 50 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0154] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 100 kGy, the energy is set to 400 keV, and the beam current is set to 100 mA. After curing, it is cut to obtain an EB film material.

[0155] Reference Figure 1 and Figure 2 The EB film material 1 prepared above includes a base film 101 and an EB release layer 102 attached to the surface of the base film 101;

[0156] The EB release layer 102 is formed by curing the EB coating, and the thickness of the EB release layer 102 is 100 μm.

[0157] (B) Prepare a weight of 120g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0158] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 4:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 1;

[0159] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 100% of the relative base paper weight, the impregnation speed is 40m / min, and the tension is 45±0.5N;

[0160] The first drying is performed at 140° C. for 30 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0161] (C) coating amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 40% relative to the weight of the base paper, and performing a second drying at 150° C. for 40 seconds to form amine-formaldehyde resin layers on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is cut after cooling.

[0162] like Figure 3and Figure 4 As shown, the prepared impregnated decorative paper has an impregnation amount of 140%, a volatile matter content of 7%, a pre-curing degree of 50%, a formaldehyde emission of ≤0.3 mg / L, and a thickness of 0.2 mm.

[0163] (D) Prepare a fiberboard with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0164] Reference Figure 5 The impregnated decorative paper 2 and the EB film material 1 are sequentially stacked on the upper surface of the substrate 3 and transported to the assembly hot pressing station, where a flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer film surface of the base film 101 of the EB film material 1. The thickness of the flat steel template is 6 mm, and the glossiness does not exceed 20 GS.

[0165] The process parameters of the pressing and laminating are: pressure 15 MPa, temperature 195° C., duration 35 seconds, the contact surface of the impregnated decorative paper 2 and the EB release layer 102 are fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0166] (E) After the hot pressing, the plate is taken out, the base film 101 is torn off, the edges are trimmed and stacked, and the temperature is lowered to <40° C. A PP film as a protective film 4 is applied to the surface of the EB release layer 102 by an automatic laminating machine to obtain an EB triamine decorative panel V.

[0167] Reference Figure 6 The EB triamine decorative panel prepared above comprises a substrate 3, one surface of which is compounded with an impregnated decorative paper 2 and an EB release layer 102 in sequence, and the EB release layer 102 is in contact with the impregnated decorative paper 2 and pressed and compounded;

[0168] The impregnated decorative paper comprises a base paper 203, a urea-formaldehyde resin layer 202 and an amine-formaldehyde resin layer 201, and the upper and lower surfaces of the base paper 203 are respectively covered with the urea-formaldehyde resin layer 202 and the amine-formaldehyde resin layer 201 in sequence.

[0169] Comparative Example 1

[0170] The preparation method of this comparative example comprises the following steps:

[0171] (A) Preparation of EB membrane

[0172] -Prepare basement membrane:

[0173] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polyethylene terephthalate film with a thickness of 0.1 mm and a width of 1250 mm.

[0174] -Prepare EB coating:

[0175] The preparation comprises the following raw materials in parts by weight:

[0176] 40kg polyurethane acrylic resin, viscosity 10000mPa·s (25℃);

[0177] 20 kg of acrylate monomer (hydroxyethyl acrylate), viscosity 500 mPa·s (25°C);

[0178] 4kg melamine acrylic monomer, the molecular structure is as follows:

[0179]

[0180] 0.5kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0181] 0.1kg additives:

[0182] The additives include a wear-resistant and scratch-resistant agent (nano silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether modified polysiloxane), an antibacterial and mildew-proof agent (nano silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 1:0.5:0.5:0.5:0.5:0.5 respectively.

[0183] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 30 m / min, the unwinding tension is 40 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0184] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 30 kGy, the energy is set to 100 keV, and the beam current is set to 50 mA. After curing, the film material is cut to obtain an EB film material.

[0185] The prepared EB film material comprises a base film and an EB release layer attached to the surface of the base film, wherein the EB release layer is formed by curing the EB coating, and the thickness of the EB release layer is 30 μm.

[0186] (B) Prepare a weight of 70g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0187] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.8;

[0188] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 80% of the relative base paper weight, the impregnation speed is 30m / min, and the tension is 45±0.5N;

[0189] The first drying is performed at 120° C. for 20 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0190] (C) coating an amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 20% relative to the weight of the base paper, and performing a second drying at 130° C. for 30 seconds to form an amine-formaldehyde resin layer on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is obtained by cutting after cooling.

[0191] The prepared impregnated decorative paper has an impregnation amount of 100%, a volatile matter content of 5%, a pre-curing degree of 30%, a formaldehyde release amount of ≤0.3 mg / L, and a thickness of 0.1 mm.

[0192] (D) Prepare 18mm thick plywood as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0193] The impregnated decorative paper and EB membrane material are stacked in sequence on the upper surface of the substrate and transported to the hot pressing station for assembly. A flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer membrane surface of the base membrane of the EB membrane material. The thickness of the flat steel template is 4.5 mm and the glossiness does not exceed 20GS.

[0194] The process parameters of the pressing and laminating are: pressure 8 MPa, temperature 150° C., duration 150 seconds, the contact surface of the impregnated decorative paper and the EB release layer is fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0195] (E) After the hot pressing, the board is taken out and the base film is torn off. The EB release layer and the base film are not completely separated and there is residue. The skin feel of the board surface is poor. This production process is not suitable and no subsequent performance test is performed.

[0196] Comparative Example 2

[0197] The preparation method of this comparative example comprises the following steps:

[0198] (A) Preparation of EB membrane

[0199] -Prepare basement membrane:

[0200] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polyimide film with a thickness of 0.2 mm and a width of 1250 mm.

[0201] -Prepare EB coating:

[0202] The preparation comprises the following raw materials in parts by weight:

[0203] 50kg polyurethane acrylic resin, viscosity 5000mPa·s (25℃);

[0204] 35 kg acrylate monomer (acryloylmorpholine), viscosity 300 mPa·s (25°C);

[0205] 3kg silicone resin (main component is polydimethylsiloxane);

[0206] 3kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0207] 0.3kg additives:

[0208] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 1.5:1:1:1:1:1.

[0209] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 25 m / min, the unwinding tension is 45 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0210] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 65 kGy, the energy is set to 250 keV, and the beam current is set to 75 mA. After curing, the film material is cut to obtain an EB film material.

[0211] The prepared EB film material comprises a base film and an EB release layer attached to the surface of the base film, wherein the EB release layer is formed by curing the EB coating, and the thickness of the EB release layer is 65 μm.

[0212] (B) Prepare a weight of 100g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0213] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.9;

[0214] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 90% of the relative base paper weight, the impregnation speed is 35m / min, and the tension is 45±0.5N;

[0215] The first drying is performed at 130° C. for 25 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0216] (C) coating amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 30% relative to the weight of the base paper, and performing a second drying at 140° C. for 35 seconds to form amine-formaldehyde resin layers on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is obtained by cutting after cooling.

[0217] The prepared impregnated decorative paper has an impregnation amount of 120%, a volatile matter content of 6%, a pre-curing degree of 40%, a formaldehyde release amount of ≤0.3 mg / L, and a thickness of 0.15 mm.

[0218] (D) Prepare a particle board with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0219] The impregnated decorative paper and EB membrane material are stacked in sequence on the upper surface of the substrate and transported to the assembly hot pressing station, where a flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer membrane surface of the base membrane of the EB membrane material. The thickness of the flat steel template is 5 mm and the glossiness does not exceed 20GS.

[0220] The process parameters of the pressing and laminating are: pressure 12 MPa, temperature 170°C, time 100S, the contact surface of the impregnated decorative paper and the EB release layer is fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0221] (E) After the hot pressing, the board is taken out, the base film is torn off, the edges are trimmed and the temperature is lowered to <40° C. It is found that there is delamination between the EB release layer and the impregnated decorative paper. This production process is not suitable, and subsequent performance tests are not performed.

[0222] Comparative Example 3

[0223] The preparation method of this comparative example comprises the following steps:

[0224] (A) Preparation of EB membrane

[0225] -Prepare basement membrane:

[0226] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polyimide film with a thickness of 0.2 mm and a width of 1250 mm.

[0227] -Prepare EB coating:

[0228] The preparation comprises the following raw materials in parts by weight:

[0229] 50kg polyurethane acrylic resin, viscosity 5000mPa·s (25℃);

[0230] 35 kg acrylate monomer (acryloylmorpholine), viscosity 300 mPa·s (25°C);

[0231] 5kg melamine acrylic monomer, the molecular structure is as follows:

[0232]

[0233] 3kg silicone resin (main component is polydimethylsiloxane);

[0234] 3kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0235] 0.3kg additives:

[0236] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 1.5:1:1:1:1:1.

[0237] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 25 m / min, the unwinding tension is 45 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0238] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 65 kGy, the energy is set to 250 keV, and the beam current is set to 75 mA. After curing, the film material is cut to obtain an EB film material.

[0239] The EB film material prepared above comprises a base film and an EB release layer attached to the surface of the base film;

[0240] The EB release layer is formed by curing the EB coating, and the thickness of the EB release layer is 65 μm.

[0241] (B) Prepare a weight of 100g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0242] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.9;

[0243] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 90% of the relative base paper weight, the impregnation speed is 35m / min, and the tension is 45±0.5N;

[0244] The first drying was carried out at 130° C. for 25 seconds, and a urea-formaldehyde resin layer was formed on the surface of the base paper. The urea-formaldehyde resin layer was not completely cured. After cooling, the base paper was cut to obtain the impregnated decorative paper with a thickness of 0.1 mm.

[0245] (C) Prepare a particle board with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0246] The impregnated decorative paper and EB membrane material are stacked in sequence on the upper surface of the substrate and transported to the assembly hot pressing station, where a flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer membrane surface of the base membrane of the EB membrane material. The thickness of the flat steel template is 5 mm and the glossiness does not exceed 20GS.

[0247] The process parameters of the pressing and laminating are: pressure 12 MPa, temperature 170° C., time 100 s, the contact surface of the impregnated decorative paper and the EB release layer is fused, and the urea-formaldehyde resin layer is completely cured simultaneously.

[0248] (D) After the hot pressing, the board was taken out, the base film was torn off, the edges were trimmed and the temperature was lowered to <40° C. It was found that there was delamination between the EB release layer and the impregnated decorative paper. This production process was not suitable and subsequent performance tests were not performed.

[0249] Comparative Example 4

[0250] The preparation method of this comparative example comprises the following steps:

[0251] (A) Preparation of EB membrane

[0252] -Prepare basement membrane:

[0253] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polytetrafluoroethylene film with a thickness of 0.3 mm and a width of 1250 mm.

[0254] -Prepare EB coating:

[0255] The preparation comprises the following raw materials in parts by weight:

[0256] 60kg polyurethane acrylic resin, viscosity 1000mPa·s (25℃);

[0257] 50 kg acrylate monomer (isobornyl methacrylate), viscosity 30 mPa·s (25°C);

[0258] 8kg melamine acrylic monomer, the molecular structure is as follows:

[0259]

[0260] 5kg silicone resin (main component is polydimethylsiloxane);

[0261] 5kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0262] 0.5kg additives:

[0263] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 2:1.5:1.5:1.5:1.5:1.5 respectively.

[0264] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 20 m / min, the unwinding tension is 50 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0265] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 100 kGy, the energy is set to 400 keV, and the beam current is set to 100 mA. After curing, it is cut to obtain an EB film material.

[0266] The prepared EB film material comprises a base film and an EB release layer attached to the surface of the base film, wherein the EB release layer is formed by curing the EB coating, and the thickness of the EB release layer is 100 μm.

[0267] (B) Prepare a weight of 120g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0268] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 4:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 1;

[0269] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 100% of the relative base paper weight, the impregnation speed is 40m / min, and the tension is 45±0.5N;

[0270] The first drying is performed at 140° C. for 30 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0271] (C) coating amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 40% relative to the weight of the base paper, and performing a second drying at 150° C. for 40 seconds to form amine-formaldehyde resin layers on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is cut after cooling.

[0272] The prepared impregnated decorative paper has an impregnation amount of 140%, a volatile matter content of 7%, a pre-curing degree of 50%, a formaldehyde release amount of ≤0.3 mg / L, and a thickness of 0.2 mm.

[0273] (D) Prepare a fiberboard with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0274] The impregnated decorative paper and EB membrane material are stacked in sequence on the upper surface of the substrate and transported to the hot pressing station for assembly. A flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer membrane surface of the base membrane of the EB membrane material. The thickness of the flat steel template is 6 mm and the glossiness does not exceed 20GS.

[0275] The process parameters of the pressing and laminating are: pressure 15 MPa, temperature 195° C., time 35 seconds, the contact surface of the impregnated decorative paper and the EB release layer is fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0276] (E) After the hot pressing, the sheet is taken out, the base film is torn off, the edges are trimmed and stacked, and the temperature is lowered to <40° C. A PP film as a protective film is laminated on the surface of the EB release layer by an automatic laminating machine to obtain a composite sheet.

[0277] Comparative Example 5

[0278] A method for preparing an EB triamine decorative panel comprises the following steps:

[0279] (A) Preparation of EB membrane

[0280] -Prepare basement membrane:

[0281] The base film is a polymer film that can withstand a high temperature of at least 195° C. The polymer film used in this embodiment is a polytetrafluoroethylene film with a thickness of 0.3 mm and a width of 1250 mm.

[0282] -Prepare EB coating:

[0283] The preparation comprises the following raw materials in parts by weight:

[0284] 60kg polyurethane acrylic resin, viscosity 1000mPa·s (25℃);

[0285] 50 kg acrylate monomer (isobornyl methacrylate), viscosity 30 mPa·s (25°C);

[0286] 6kg melamine acrylic monomer, the molecular structure is as follows:

[0287]

[0288] 5kg silicone resin (main component is polydimethylsiloxane);

[0289] 5kg coupling agent (methacryloxypropyltrimethoxysilane KH-570);

[0290] 0.5kg additives:

[0291] The additives include a wear-resistant and scratch-resistant agent (nano-silicon dioxide), a leveling agent (polysiloxane-polyether copolymer TEGO450), a defoaming agent (the main component is polyether-modified polysiloxane), an antibacterial and mildew-proof agent (nano-silver), an ultraviolet absorber (benzotriazole) and a flame retardant (phosphorus-nitrogen flame retardant, AFLAMMIT PCI 202, the particle size should be ≤10 μm), and the mass ratios of the components are 2:1.5:1.5:1.5:1.5:1.5 respectively.

[0292] (A-1) The raw materials for preparing the EB coating are mixed uniformly, the unwinding speed of the base film is 20 m / min, the unwinding tension is 50 kg, and the EB coating is applied to the surface of the base film to prepare a film material;

[0293] (A-2) The film material is transferred to an EB curing device and electron beam cured in an oxygen-free environment. The absorbed dose is set to 100 kGy, the energy is set to 400 keV, and the beam current is set to 100 mA. After curing, it is cut to obtain an EB film material.

[0294] The prepared EB film material comprises a base film and an EB release layer attached to the surface of the base film, wherein the EB release layer is formed by curing the EB coating, and the thickness of the EB release layer is 100 μm.

[0295] (B) Prepare a weight of 120g / m 2 Base paper and urea-formaldehyde resin impregnation solution;

[0296] The urea-formaldehyde resin impregnation liquid comprises melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 4:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 1;

[0297] The base paper is impregnated with urea-formaldehyde resin impregnation liquid, the impregnation amount is 100% of the relative base paper weight, the impregnation speed is 40m / min, and the tension is 45±0.5N;

[0298] The first drying is performed at 140° C. for 30 seconds, and a urea-formaldehyde resin layer is formed on the surface of the base paper, and the urea-formaldehyde resin layer is not completely cured;

[0299] (C) coating amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 40% relative to the weight of the base paper, and performing a second drying at 150° C. for 40 seconds to form amine-formaldehyde resin layers on the upper and lower surfaces of the urea-formaldehyde resin layer, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured, and the impregnated decorative paper is cut after cooling.

[0300] The prepared impregnated decorative paper has an impregnation amount of 140%, a volatile matter content of 7%, a pre-curing degree of 50%, a formaldehyde release amount of ≤0.3 mg / L, and a thickness of 0.2 mm.

[0301] (D) Prepare a fiberboard with a thickness of 18 mm as the substrate, check that the surface of the substrate is flat and has no pits, and clean the dust and garbage on the surface of the substrate.

[0302] The impregnated decorative paper and EB membrane material are stacked in sequence on the upper surface of the substrate and transported to the hot pressing station for assembly. A flat steel plate is provided for pressing and laminating. The flat steel plate is in contact with the outer membrane surface of the base membrane of the EB membrane material. The thickness of the flat steel template is 6 mm and the glossiness does not exceed 20GS.

[0303] The process parameters of the pressing and laminating are: pressure 20 MPa, temperature 250° C., time 35 seconds, the contact surface of the impregnated decorative paper and the EB release layer is fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are completely cured simultaneously.

[0304] (E) After the hot pressing, the plate is taken out, the base film is torn off, the edges are trimmed and the temperature is lowered to <40°C. A PP film as a protective film is laminated on the surface of the EB release layer by an automatic laminating machine. It is found that there is delamination between the EB release layer and the impregnated decorative paper. This production process is not suitable for use, and subsequent performance tests are not performed.

[0305] Performance Testing

[0306]

[0307] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also change and modify the above implementation modes. Therefore, the present invention is not limited to the specific implementation modes disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. An EB film material, characterized in that: It includes a base film and an EB release layer attached to the surface of the base film; The EB release layer is formed by curing the EB coating, and the EB coating contains the following raw materials in parts by weight: 40 to 60 parts of polyurethane acrylic resin, 20 to 50 parts of acrylate monomer, 4 to 6 parts of melamine acrylic monomer, 1 to 5 parts of silicone resin, 0.5 to 5 parts of coupling agent and 0.1 to 0.5 parts of auxiliary agent.

2. The EB membrane material according to claim 1, characterized in that: The acrylate monomer is one of 3,3,5-trimethylcyclohexyl acrylate, hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxypropyl acrylate, isooctyl acrylate, 1,6-hexanediol diacrylate, trimethylolpropane triacrylate, cyclotrimethylolpropane methyl ether acrylate, dipentaerythritol hexaacrylate, dipropylene glycol diacrylate, isobornyl acrylate, acryloyl morpholine, isobornyl methacrylate and tetrahydrofurfuryl acrylate, or a mixture of any proportion of more than one of them.

3. The EB membrane material according to claim 1, characterized in that: The melamine acrylic monomer is a product having a carbon-nitrogen double bond formed by a condensation reaction between at least one amino group of melamine and an organic substance containing at least one aldehyde group; The organic matter containing aldehyde groups is one or more of p-hydroxybenzaldehyde, o-hydroxybenzaldehyde, m-hydroxybenzaldehyde, 2,3-dihydroxybenzaldehyde or 3,4-dihydroxybenzaldehyde.

4. The EB membrane material according to claim 1, characterized in that: The base film is a polymer film that can withstand a high temperature of at least 195°C; The polymer film is any one of a polyethylene terephthalate film, a polyimide film, and a polytetrafluoroethylene film; The thickness of the base film is 0.1-0.3 mm, and the thickness of the EB release layer is 30-100 μm.

5. The EB membrane material according to claim 1, characterized in that: The main component of the silicone resin is polydimethylsiloxane; The coupling agent is methacryloxypropyltrimethoxysilane; The additives include abrasion and scratch resistant agents, leveling agents, defoaming agents, antibacterial and mildew proof agents, ultraviolet absorbers and flame retardants, and the mass ratio of each component is 1-2: 0.5-1.5: 0.5-1.5: 0.5-1.5: 0.5-1.5: 0.5-1.5; The wear-resistant and scratch-resistant agent is nano-silicon dioxide; the leveling agent is polysiloxane-polyether copolymer; the main component of the defoaming agent is polyether-modified polysiloxane; the antibacterial and mildew-proof agent is nano-silver; the ultraviolet absorber is benzotriazole; and the flame retardant is a phosphorus-nitrogen flame retardant with a particle size of ≤10μm.

6. The method for preparing the EB membrane according to claims 1 to 5, characterized in that: The steps include: (A-1) mixing the raw materials for preparing the EB coating uniformly, and then coating the mixture on the surface of the base film to prepare a film material; (A-2) The film material is electron beam cured in an oxygen-free environment, with the absorbed dose set to 30-100 kGy, the energy set to 100-400 keV, and the beam current set to 50-100 mA, thereby obtaining an EB film material.

7. A method for preparing an EB triamine decorative panel, characterized in that: The steps include: (A) preparing the EB film material according to claims 1 to 6; (B) impregnating the base paper with urea-formaldehyde resin impregnation liquid in an amount of 80-100% relative to the weight of the base paper, and performing a first drying at 120-140° C. for 20-30 seconds to form a urea-formaldehyde resin layer on the surface of the base paper, wherein the urea-formaldehyde resin layer is not completely cured; (C) coating an amine-formaldehyde resin on the upper and lower surfaces of the urea-formaldehyde resin layer in an amount of 20-40% relative to the weight of the base paper, and performing a second drying at 130-150° C. for 30-40 seconds to form an amine-formaldehyde resin layer on the upper and lower surfaces of the urea-formaldehyde resin layer to obtain the impregnated decorative paper, wherein the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are not completely cured; (D) stacking the impregnated decorative paper and the EB film material on the surface of the substrate in sequence, and pressing and laminating them at a pressure of 8 to 15 MPa, a temperature of 150 to 195° C., and a time of 35 to 150 seconds, wherein the contact surface of the impregnated decorative paper and the EB release layer are fused, and the urea-formaldehyde resin layer and the amine-formaldehyde resin layer are simultaneously and completely cured; (E) After the hot pressing is completed, the base film is torn off the plate to obtain an EB triamine decorative panel.

8. The method for preparing the EB triamine decorative panel according to claim 7, characterized in that: In step (B), the base paper has a grammage of 70 to 120 g / m 2 , the impregnation speed of the base paper into the urea-formaldehyde resin impregnation liquid is 30-40 m / min, and the tension is 45±0.5N; The urea-formaldehyde resin impregnation liquid contains melamine-formaldehyde resin and urea-formaldehyde resin in a mass ratio of 3.5-4:1, and the molar ratio F / U of formaldehyde to urea in the urea-formaldehyde resin is 0.8-1.

9. The method for preparing the EB triamine decorative panel according to claim 7 or 8, characterized in that: The impregnated decorative paper prepared in step (C) has an impregnation amount of 100-140%, a volatile matter content of 5-7%, a pre-curing degree of 30-50%, and a formaldehyde release of ≤0.3 mg / L.

10. The EB triamine decorative panel prepared by the preparation method according to claims 7 to 9, characterized in that: It comprises a substrate, at least one surface of which is compounded with an impregnated decorative paper and an EB release layer in sequence, and the EB release layer is in contact with the impregnated decorative paper and pressed and compounded; The impregnated decorative paper comprises base paper, a urea-formaldehyde resin layer and an amine-formaldehyde resin layer, and the upper and lower surfaces of the base paper are respectively covered with the urea-formaldehyde resin layer and the amine-formaldehyde resin layer in sequence.

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