CN114800725A - Fireproof, waterproof and deformation-resistant digital colored drawing UV (ultraviolet) coating scientific furniture board and preparation process thereof - Google Patents

Abstract

The invention discloses a fireproof, waterproof and deformation-resistant digital UV-painted furniture board and a preparation process thereof, wherein the preparation process comprises the following steps: the composite decorative coating comprises a thick-core long middle plate layer positioned on a central layer, and thin-core short middle plate layers, fireproof, waterproof and deformation-resistant thin plate layers and a digital colored drawing UV coating composite decorative coating which are sequentially and symmetrically glued on the surfaces of two sides of the thick-core long middle plate layer from inside to outside; the digital colored drawing UV coating composite decorative coating at least comprises a bottom coating UV composite coating, a digital colored drawing UV composite coating, a middle coating UV composite coating and a top coating UV composite coating in the distribution arrangement order from inside to outside; the preparation process comprises the following steps: 1) preparing a fireproof, waterproof and anti-deformation base material; 2) coating a digital colored drawing UV coating composite decorative coating; 3) the coating surface is a scratch-proof protective film. The invention solves the problem that the deformation resistance, the moisture and water resistance and the fireproof flame retardant property of the traditional digital UV painting coating furniture board are difficult to be considered at the same time, simplifies the board manufacturing process and achieves the purposes of saving materials, improving efficiency and reducing cost.

Description

Fireproof, waterproof and anti-deformation digitally painted UV coating science and technology furniture board and its preparation process

technical field

The invention belongs to the technical field of furniture materials, and in particular relates to a fireproof, waterproof, anti-deformation digital color-painted UV-coated sci-tech innovation furniture board and a preparation process thereof.

Background technique

Digital painting UV coating furniture board refers to the base material of wood-based plain board or decorative veneer veneer wood-based board, the surface is processed by artistic design and intelligent digital coating process, and it is mainly used for board or board wood. Painted wooden decorative panels for furniture making and other furniture purposes. Also known as: Smart Digital Painting Furniture Board. It is a new type of home decoration material that has gradually emerged in my country in recent years. Because of its surface decorative patterns, textures and colors, it has high simulation and natural authenticity, as well as excellent designability and fast customized production and delivery. As well as many advantages such as environmental protection, standardization, large-scale, customized or personalized production and delivery, it has been loved by furniture manufacturers, decoration companies and consumers. Its product application has been extended to cabinets, walls, doors, floors, ceilings and other whole home space applications and different application scenarios.

However, in the existing product system of digitally painted UV-painted furniture panels, the traditional digitally-painted UV-painted furniture panels based on solid wood multi-layer plywood or decorative veneer veneer plywood have the following problems :

(1) The problem of anti-deformation

The traditional digital painting UV coating furniture board is based on solid wood multi-layer plywood or decorative veneer veneer plywood. Fast-growing forest wood is processed, and artificial fast-growing forest wood can grow into wood in 4-6 years because of its extremely fast growth rate. Although its wood resources are rich in sources, short supply cycle, and advantageous in price and cost, the wood itself exists and remains. There is a lot of growth stress, which is not easy to eliminate, and it is easy to cause problems such as warpage and cracking of its wood products. Therefore, the digitally painted UV-painted furniture panels prepared from artificial fast-growing forest wood and based on solid wood multi-layer plywood and its decorative veneer veneer panels have poor deformation resistance, and their products and products are prone to warping. The risk of warping and deformation; when the length or height of the wardrobe door panel exceeds 1.8m, it is necessary to improve the deformation resistance of the board or its finished parts, and special treatment such as anti-deformation strips must be used or installed. Only in this way can the stable performance of the size and shape structure of the product or product be ensured; however, such treatment not only increases the production cost, but also can only cure the symptoms and not the root cause, and cannot completely eliminate the long-term release of the residual growth stress in the wood material and its board products. The resulting risk of deformation in size and shape.

(2) The optimization and balance of moisture-proof, waterproof and fire-retardant properties

The traditional digital painted UV coating furniture board with solid wood multi-layer plywood or decorative veneer veneer plywood as the base material, if the material is not flame retardant, although the product has good moisture-proof and waterproof performance, it does not have flame-retardant performance. The product cannot be used in high-rise buildings and public places such as custom furniture and decoration and other applications that require flame retardant performance; if the material of the product is flame retardant, such as adding a flame retardant treatment agent to wood, or using Flame retardant adhesives, etc., will reduce the moisture-proof and waterproof performance of the product, so its products cannot be used in areas, use environments or application scenarios where moisture or moisture is relatively frequent; in short, there are different degrees of moisture-proof and waterproof performance and It is difficult to take into account the flame retardancy and fire resistance, and it is a problem that needs to be improved.

(3) The problems of long production process, long production cycle, complex process, high production cost and large labor volume

The traditional digital painting UV coating furniture board with solid wood multi-layer plywood or decorative veneer veneer plywood as the base material needs to meet the technical requirements of the printing and coating integration process of the digital painting UV coating in the post-process, and it is necessary to ensure the surface of the board. To ensure the quality of the digital painting or printing effect of the decorative pattern image layer (such as: resolution, sharpness, printing accuracy, fidelity, printing and coating appearance defects, etc.); therefore, it usually requires multiple sets of Blank, multiple repairs, multiple thickness-setting sanding (more than 4 times of molding), and at least two layers of veneer on the surface can ensure that the flatness and surface characteristics of the substrate meet the technical requirements of the integration of printing and coating. ;It is not only limited by the resources of veneer veneer, but also leads to too cumbersome production process, long production cycle and delivery time; it is not only unfavorable to reflect the product characteristics of digital painting UV coating technology that can be quickly designed and produced and delivered. And technological advantages have also caused problems related to the increase in manufacturing production costs, the increase in labor consumption and worker recruitment, and the difficulty of mechanization and automation.

SUMMARY OF THE INVENTION

Aiming at the deficiencies existing in the existing product systems of digitally painted UV-painted furniture panels, the purpose of the present invention is to provide a digitally painted UV-painted furniture panel that is fireproof, waterproof and anti-deformation and a preparation process thereof.

The technical scheme of the present invention is summarized as follows:

A fireproof, waterproof and anti-deformation digitally painted UV-painted furniture board respectively comprises: a thick-core long middle board layer located in a central layer, and symmetrically glued on both sides surfaces of the thick-core long middle board layer in order from the inside to the outside The thin-core short-medium board layer, the fire-proof, waterproof and anti-deformation thin-board layer, and the digital painted UV coating composite decorative coating; the overall thickness of the furniture board formed by superimposing and gluing the above material layers is 12-25mm, which can meet the requirements of panel furniture. Requirements for thickness and size specifications of various conventional applications such as cabinets and cabinet doors;

The thickness of the digital painted UV coating composite decorative coating is 0.1-0.2mm, and according to the distribution order from the inside to the outside, it at least includes the primer UV composite coating, the digital painted UV composite coating, and the middle coating UV composite coating. and topcoat UV composite coating;

The primer UV composite coating is arranged in order from the inside to the outside, at least including: 1 layer of roller-coating UV transparent high-penetration primer coating, 1 layer of roller-coating UV transparent high-adhesion primer and roller-coating UV Composite coating of transparent high-adhesion putty, 2-layer roll-applied UV transparent plain putty and roll-applied UV clear sanding primer composite coating, 2-3 roll-applied UV white cover primer coating or roll-applied UV repair Color primer coating;

The digital painted UV composite coating is arranged in order from the inside out, at least including: 1 layer of roller coating UV transparent ink high-adhesion primer coating, 1 layer of spray printing UV digital painting decorative pattern or digital painting image ink coating;

The middle-coat UV composite coating, in the order of distribution from the inside to the outside, should at least include: 1 layer of roller-coated UV transparent hardened primer or wear-resistant primer coating, 1 layer of roller-coated UV transparent sanding primer paint coating;

The topcoat UV composite coating at least includes: 1 layer of roller-coated UV transparent topcoat before showering, 1 layer of shower-coated UV transparent topcoat; or at least 2 layers of roller-coated UV transparent topcoat; Or at least one layer of roller-coated UV transparent skin-feeling topcoat is included; or at least one layer of roller-coated UV transparent laser roller topcoat is included.

Preferably, the water content of the thick core-length middle plate layer is 8-14%, the thickness is 5-14mm, the thickness deviation should be controlled within ±0.2mm, and the appearance quality level should not be lower than the industry standard or market standard. The superior grade or grade A, grade one, when using it, it needs to be sanded with fixed thickness and fixed thickness on both sides, and the grain size of the sanding belt is 60 mesh. The grain direction is parallel to or consistent with the length direction of the product; when the thickness is 5-10mm, it is advisable to use the whole-sheet pine long-medium board with the processing method of rotary cutting; when the thickness is 10-14mm, it is advisable to use the whole Formaldehyde-free solid wood panel made of Zhanghua, processing method is sawing, length splicing method is finger joint or flush joint, and width splicing method is flush joint gluing. The material should be selected from pine, fir, poplar or jacaranda. any kind.

Preferably, the water content of the thin-core short-medium board layer is 8-14%, the thickness is 1.5-3.5mm, the thickness deviation is controlled within ±0.1mm, and the appearance quality level should not be lower than the industry standard or market standard. The superior grade or grade A, grade one, when grouping or splicing the whole sheet, the placement method should ensure that the grain direction of the wood and the length direction of the product are parallel or consistent with each other; the material is selected from fast-growing poplar or eucalyptus. a kind of.

Preferably, the water content of the fireproof, waterproof, deformation-resistant sheet layer is 6-12%, the water absorption rate should be ≤15%, the air-dry density should be 1.0-1.5g/cm ³ , the dry shrinkage and swell rate should be ≤0.2%, The thickness is 3.0-4.0mm, and the thickness deviation should be controlled within ±0.2mm. When it is used, it is necessary to use a 120-mesh-150-mesh abrasive belt for double-sided fixed-thickness sanding to obtain direct coating and gluing. , Fine surface effect without secondary flatness processing; its combustion performance level should not be lower than A2 level;

The material is a cementitious plate material made of flame-retardant cementitious material and wood fiber, wherein the flame-retardant cementitious material is magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, calcium silicate, calcium carbonate One or more of the above; the proportion of wood fiber should be controlled at 4%-10%.

A preparation process for a fireproof, waterproof and anti-deformation digitally painted UV coating furniture board, comprising the following steps:

S1: Preparation of fireproof, waterproof and anti-deformation substrate:

S101: Double-sided coating of the thick-core and long-medium board with adhesive, and the total amount of double-sided coating is 400-500 g/m ² ;

S102: Superimpose and glue two thin-core short-medium boards on the lower and upper surfaces of the double-sided glued thick-core long-medium boards, respectively, and control the wood grain direction of the thick-core long-medium boards and the slabs. The length direction is consistent with each other, and the wood grain direction of the thin-core short-medium board is consistent with the width direction of the slab to form a three-clamp slab; specifically: on the workbench provided with the reference edge device (one side and one end), the ends are aligned. Place a layer of thin-core short-medium boards on the same side; then, place the thick-core long-medium boards with double-sided glue on top of the thin-core short-medium boards at the bottom; On top of the double-sided glued thick-core long-medium board layer, a layer of thin-core short-medium board is placed side by side to complete the production of a group of three-plywood slabs;

S103: Quantitative receiving once within a time limit: stack multiple groups of three-clamp slabs to a height of 1.0-1.6m (100-150 groups), and then transfer to the subsequent cold pressing process, and the operation completion time is controlled within 2h;

S104: One-time cold pressing and repairing within a limited time: place the group of billets obtained in S103 into the cold press equipment for cold pressing and gluing and preliminary forming operations; the unit pressure of cold pressing is controlled at 0.6-0.8MPa, and the cold pressing time is controlled at 0.5-1h; after cold pressing, the flatness repair of the board should be completed within 2h;

S105: One-time hot pressing and gluing for a limited time: Under the conditions of temperature of 115-125 °C and unit pressure of 0.7-0.9 MPa, hot-pressing and molding of the three-clamp slab, the unit time of hot pressing is controlled at 1.2-1.5 min/mm, the hot-pressing process curve is ≥3 sections, the time of the fast closing section is less than 60s, and the unit time of the pressure relief and moisture removal section should be controlled within 0.3-0.5min/mm; the total completion time of the process is controlled within 2h;

S106: Quantitatively stack the three-plywood blanks, and use a weight of not less than 2t to compact the three-plywood blanks, so that they can be naturally maintained for 3-5d in the state of load-bearing and flatness, release the stress, and naturally cool to the environment. Phase-balanced state (temperature, dry humidity) to avoid warping deformation; then, roll-coating special repair putty for furniture boards to repair the flatness of the board surface of the three-clamp slab; after the putty is cured, use a particle size specification of 40- The 60-mesh abrasive belt performs double-sided fixed-thickness sanding on the board surface to ensure that the board surface is smooth and clean;

S107: Apply glue on both sides of the three-plywood blank, and the amount of glue on both sides is controlled at 400-450g/m ² ; m ² ;

S108: The glued sides of the two fire-proof, waterproof and deformation-resistant sheets are superimposed and glued on the bottom and the top of the double-sided glued three-ply slab blanks, respectively, to form a five-plywood slab; specifically: when forming the blanks, First, place a layer of fire-proof, waterproof and anti-deformation sheet (single-sided glue) on the workbench, and place the non-glued plate face down and the glued plate face up; then, A layer of three-plywood blanks (double-sided gluing) is superimposed on it; finally, a layer of fireproof, waterproof and anti-deformation with the glued side down and the non-glued side up is superimposed on the three-plywood blank (double-sided glued). sheet, the production of a group of five-ply slab blanks can be completed;

The adhesives used for gluing between the above-mentioned thick-core long-medium ply, thin-core short-medium ply, and fireproof and waterproof thin ply are all acrylic-modified polyvinyl acetate-based wood inorganic and non-organic materials from Sankeshu Paint Co., Ltd. Aldehyde-added waterproof adhesives, or commercially available adhesives with similar properties; the dipping and peeling properties of the adhesive layer are required to be not lower than the requirements of Class III boards, and both wood and inorganic materials are applicable;

S109: Time-limited secondary quantitative collection: stack multiple groups of five-clamp slabs to a height of 1.0-1.6m, and then transfer to the subsequent cold pressing process, and the operation completion time is controlled within 2h;

S110: Time-limited secondary cold pressing: under the unit pressure of 0.6-0.8MPa, cold-pressing for 0.5-1h;

S111: Time-limited secondary hot pressing and gluing molding: under the conditions of temperature of 115-125 °C and unit pressure of 0.7-0.9 MPa, hot-pressing and molding of five-clamp slabs, and the unit time of hot pressing is controlled at 1.2- 1.5min/mm, the hot-pressing process curve is ≥3 sections, the time of the fast closing section is less than 60s, and the unit time of the pressure relief section should be controlled within 0.3-0.5min/mm; the total completion time of the process is controlled within 2h ;

S112: Time-limited secondary curing, fixed thickness sanding, sawing: Quantitatively stack the five-plywood blanks, and use a weight of not less than 2t to compact the five-plywood blanks, so that they can be naturally maintained under the state of load-bearing and flatness 3-5d, release the stress, and cool it naturally to a state of equilibrium with the environment (temperature, dry humidity) to avoid warping deformation; then, roll-coat special repair putty for furniture boards, and flatten the surface of the five-ply slab blank Repair; after the putty is cured, it is transferred to the fixed thickness sanding process, and the board surface is sanded with a fixed thickness of 150-240 mesh on both sides to ensure that the board surface is smooth and clean, and then the board is sawn as needed. For cutting, cut off the excess material on the edge to ensure that no debris such as board surface garbage will be generated when the board enters the subsequent coating process; the sawing process should use a special saw blade for cutting inorganic boards;

S2: Coating digital color painting UV coating composite decorative coating: Sanding the five-plywood slab obtained from S112 on both sides with a 240-320 mesh abrasive belt, and according to the composition and distribution order of each coating layer in order Both sides of the board are coated with primer UV composite coating, digital painting UV composite coating, middle coating UV composite coating, and top coating UV composite coating. Among them, roller coating UV transparent high penetration in the primer UV composite coating The primer coating is the first layer of the entire composite coating. The total coating amount of the UV transparent high-penetration primer for roller coating is 60-75g/m ² . The coating amount is controlled at 20-25g/m ² , after the three coating series is completed, it is cured and dried by UV lamp equipment, the curing energy is controlled at 200-400mJ/cm ² , and the curing degree is controlled at 70-80%;

The roller-coating UV transparent high-penetration primer must be able to adapt to the interface characteristics of wood, inorganic and composite, mixed, homogeneous, and heterogeneous fine surface materials, and has good gluing and fusion properties for UV coatings. , the specific selection is the BM-G 001-FZ type roller coating UV transparent penetrating primer of Three Tree Coatings Co., Ltd., or the commercially available roller coating UV transparent penetrating primer coating with similar performance;

S3: The surface is covered with an anti-scratch PE protective film, and the coated surface anti-scratch PE protective film needs to be torn off and removed at the last link of product use or installation; the surface of the anti-scratch PE protective film is wrapped When the protective film is covered, it is necessary to contact the needle roller and pierce some ventilation holes with a diameter of 0.5-1mm on the plane of the surface protective film while the protective film is unfolding. The slight ink or paint odor left by the composite decorative coating, as well as the residual heat, can still be emitted from the ventilation holes above the surface protective film on the board surface and volatilized completely, ensuring that the odor level of the product can be completed in the product. After production, it is cooled in a short time to reach the clean taste level (odor level ≤ 2), and the volatile organic compound detection index can reach the lowest level of stable equilibrium in a short time after production.

Preferably, the surface anti-scratch PE protective film is a transparent PE surface protective film with a thickness of 0.04-0.06mm, with adhesive on the inner surface and easy to wrap, adhere, tear or remove, and the wrapping method is assembly line rolling. For veneer coating, the contact roller pressure only needs to maintain an appropriate amount of slight pressure to prevent crushing or crushing the paint film of the board.

The design principle of each material layer structure of the product of the present invention and its preparation process, and the principle of solving the target problem point, mainly include:

1. The design principle of thick core and long medium and thick plate, and its design function and function

(1) The material layer located in the center layer is designed as a thick core and long medium plate, which has the ideal performance of eliminating the residual growth stress of fast-growing wood and resisting the warping deformation problem of its products and their products;

(2) When the thickness of the thick-core long-medium board is in the range of 5-14mm, its products and their products are more ideal for eliminating the residual growth stress of wood growth and resisting warpage deformation.

Moreover, when the thickness is 5-10mm, the whole-sheet rotary cutting process can be used to form many fine processing cracks that do not penetrate the thickness of the plate surface on the surface of the thick-core and long-medium plate, which is equivalent to the elimination of many artificially processed strips. The groove of stress is conducive to the release of stress, so that there is basically no residual problem of wood growth stress in the thick-core and long-medium plate, so as to obtain long-term good dimensional stability and anti-deformation performance; among them, in various material effects In the comparative test of pine, it was found that the anti-deformation effect of the thick-core long-medium plate of the whole sheet of pine was the most ideal;

However, when the thickness is 10-14mm, the saw-cut slats are spliced by finger joints or flat joints in the length direction, and glued and spliced in the width direction. Ideal for eliminating the residual stress of wood growth and resisting the warping deformation of its wood products; this processing method is equivalent to first decomposing the original wood in a small size and then re-assembling and gluing it into a large-sized material layer, which is not conducive to the growth of wood. The effect of eliminating residual growth stress is also very good; among them, in the comparative test of various material effects, it is found that the anti-deformation effect of the whole thick core long medium board with integrated and glued sawing slats of poplar, fir and pine is the most ideal.

(3) Through a large number of experiments, it is also found that if the same processing method and material material technology are selected, similar effects can be obtained when the thickness is less than 5mm or greater than 14mm. However, when the thickness of the thick-core long-medium board is less than 5 mm or greater than 14 mm, the overall effect of the composite layer of the material layer with the subsequent thin-core short-medium board layer and the waterproof, fire-resistant, deformation-resistant thin-board layer is relatively unstable. Therefore, the thickness of the thick-core length medium ply is limited to 5-14mm.

(4) In addition, the setting of the thick core and long middle board also ensures that the thickness of the wood material layer accounts for at least 50% of the overall material proportion of the product, so that the product inherits the light weight of the solid wood multi-layer plywood material. , Large strength-to-weight ratio, good mechanical properties, easy processing, and relatively good processing performance in many aspects such as easy cutting, drilling, grooving, nailing, and edge sealing.

2. The design principle of thin-core short-medium-thick plate layer, and its design function and function

(1) The setting of the thin-core short-medium plywood layer, on the one hand, can increase the thickness and thickness ratio of the wood material layer after gluing with the thick-core and long-medium plywood layer, and further optimize and improve the processing performance and physical and mechanical properties of the overall product; On the other hand, the overall product and its products are given a material layer with both transverse and longitudinal grains, which optimizes and improves the anisotropy of the wood material layer and improves the deformation resistance of the products and products.

(2) In addition, the obligee of the present invention has also found through a large number of experiments that limiting the thickness of the thin-core short-medium plate to the range of 1.5-3.5 mm has more ideal industrialization prospects, operability and practicability; thickness Too thin, or less than 1.5mm, the contribution to improving the anisotropy of the overall product and its products, and improving the resistance to deformation will not be obvious; if the thickness is too thick, or greater than 3.5mm, for the raw material processing itself, the processing difficulty increases, and the material is produced. The rate, high-quality product rate, and utilization rate are greatly reduced, which is not conducive to industrialized production and resource acquisition.

3. Design principle, function and function of fireproof, waterproof and anti-deformation sheet layer

(1) The role and principle of fire and flame retardant

The fire-proof, waterproof and anti-deformation sheet layers are arranged on the outermost two layers of the base material layer. On the one hand, in the material structure design of the overall product, the product can be given two layers of materials with A2-level fire-proof and non-combustible properties, which improves the flame retardant of the overall product. performance; on the other hand, the thickness of the fireproof, waterproof, deformation-resistant sheet layer is set at 3.0-4.0mm, which is verified by a large number of tests. The material layer in this thickness range can give the whole product the ultimate performance of fire resistance time of more than 1h. , can meet the requirements of national standards for building design fire protection specifications, and will not cause excessive adverse effects on product processing performance and other quality performance.

If the thickness of this material layer is too thick, it will increase the weight and density of the product, and affect the performance of downstream users in secondary processing such as edge sealing, cutting, grooving, drilling, and nailing. If the thickness is too thin, the limit of its fire resistance time cannot meet the higher requirements for fire resistance performance in some application scenarios.

The principle of fire-retardant and flame-retardant of the material layer is to use the non-combustible and flame-retardant properties of magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, aluminum oxide, diatomaceous earth, and inorganic fillers, and combine the combustible wood fibers Or the material amount of wood scraps is controlled within 10%, so as to ensure that the combustion performance of the whole product is not lower than B1 level. Its flame retardant mechanism is that when heated, it can decompose to produce an oxide layer that blocks oxygen and a protective layer such as water and inert gas.

(2) The function and principle of waterproof and moisture-proof

The fire-proof, waterproof and anti-deformation sheet layer is used to replace the two outermost layers of wood of the traditional multi-layer plywood base material layer. The water absorption thickness expansion rate, dry shrinkage and wet expansion rate of the product improve the waterproof and moisture-proof performance of the product; on the other hand, the board surface of the whole product in contact with the outside world can be replaced by porous and hygroscopic wood with dense, homogeneous, hygroscopic Smaller wood-inorganic composite materials reduce the ability of the overall product to absorb or release moisture or moisture into the environment, thus playing a better moisture-proof role.

The principle of waterproof and moisture-proof of the material layer mainly lies in the use of magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, aluminum oxide, diatomaceous earth, and inorganic fillers with low moisture absorption performance, low water absorption performance, and low moisture expansion and dry shrinkage. The performance of wood fiber or wood scraps with high water absorption, hygroscopicity and dry shrinkage and expansion ratio is controlled within 10%, so as to ensure that the overall product has excellent waterproof and moisture-proof performance.

(3) The role and principle of anti-deformation

Through the material structure design based on the principle of symmetry of the central layer, the outermost two layers of the base material are replaced by wood with a fire-proof, waterproof and deformation-resistant sheet layer of inorganic wood composite material. The sheet has strong dimensional stability and anti-deformation performance; on the other hand, the technical balance point of the material thickness from three factors of fire-retardant and flame-retardant performance, waterproof and moisture-proof performance, and anti-deformation performance is considered; through a large number of comparative tests, the material is finally The thickness of the layer is limited to 3.0-4.0mm, so as to ensure that the technical requirements of the anti-deformation performance for the material are also taken into account while obtaining better waterproof and moisture-proof, fire-retardant and flame-retardant properties.

The principle of the anti-deformation of the material layer is to make full use of the inorganic wood composite material, which is homogeneous and compacted, has low hygroscopicity and low water absorption, and is less affected by environmental temperature, dry humidity, internal stress and other factors. The surface is relatively flat, it is not easy to bend and deform, and the material is rigid. It is used to coat and glue the wood plywood that is prone to warping deformation from both sides into a whole product, so that the core layer of the plywood in the middle position is warped and deformed. Or in a deformable environment, there is a fire-proof, waterproof, anti-deformation sheet layer, which greatly reduces the warpage deformation rate of the overall product and improves the deformation resistance of the overall product.

(4) The function and principle of the surface-free veneer layer and direct coating

The fire-proof, waterproof and anti-deformation sheet layer with excellent flat surface finish and fine surface interface characteristics is used to replace the outermost two layers of wood of the traditional multi-layer plywood base material layer. On the one hand, the material surface of the inorganic wood composite material is homogeneous, Densification, low porosity, fine surface, no color difference, etc. can be directly painted, no veneer veneer layer material interface characteristics; The proportion of fibrous wood chips is controlled in the range of 4%-10% to obtain excellent coating interface properties, and the application of appropriate modifiers ensures that the material layer can be penetrated by the transitional bridge of the primer to obtain a good coating. Direct coating performance, thus eliminating the traditional process of veneer veneer.

4. Design principles, functions and functions of digitally painted UV coating and decorative composite coatings

On the one hand, it can give decorative and protective effects to the appearance of the product, ensuring decorative and protective properties. On the other hand, the intelligent coating process attributes that can be quickly designed, produced, and delivered to the product surface decoration effect, realize WYSIWYG, and realize the integration of digital color printing and UV coating printing, coating and decoration integration process It can be imitated or innovatively designed to produce various decorative patterns and effects. At the same time, according to the quality performance or functional requirements, the product decorative surface can be given the expected performance, function or effect.

In addition, the digitally painted UV coating composite decorative coating set on both sides of the product is actually a thin layer of UV resin polymer material, and the UV resin can form a dense coating layer after curing, which has better Hydrophobicity, thus endows the surface of the product with good waterproof and moisture-proof performance, which can withstand repeated scrubbing with wet rags in daily maintenance, as well as daily changes and switching of air dry and humidity in the use environment.

Beneficial effects of the present invention:

1. Compared with the traditional multi-layer plywood as the base material of digitally painted UV painted furniture panels, the present invention solves the problem of anti-deformation and endows the product with excellent anti-deformation performance. Anti-deformation treatment such as deformation strips; it solves the problem that it is difficult to balance waterproof and moisture-proof performance and fire-retardant and flame-retardant performance; good fire-retardant and flame-retardant performance can be obtained without the use of chemical flame retardants, the product is healthier, safer and more environmentally friendly, avoiding water-soluble The use of flame retardants can improve the waterproofness of products and avoid the corrosiveness of flame retardants to furniture metal connectors.

2. The present invention simplifies the preparation process of the base material in product production, eliminates the veneer process of the primed veneer layer and the standardized veneer layer, and reduces the original process of at least four moldings to a process of only two moldings; It reduces the number of intermediate processes such as multi-channel surface repair, putty repair, sanding of fixed thickness, health preservation, blank grouping, cold pressing, hot pressing, veneer, etc., to save labor and time, energy saving, consumption reduction, efficiency improvement and cost reduction. economic effect.

3. The present invention realizes the integrated production of fire-retardant, fire-retardant, waterproof, moisture-proof and anti-deformation products, as well as the integrated production of digital color painting, UV coating, printing, coating and decoration.

Description of drawings

Fig. 1 is the material structure schematic diagram of a kind of fireproof, waterproof and anti-deformation digital color painting UV coating furniture board of the present invention; Wherein, the mark in Fig. 1 can be described as follows:

1 is a three-plywood blank formed by gluing one layer of thick core long medium plate and two layers of short medium plate;

2 is a five-plywood slab formed by gluing one layer of three-plywood slab and two layers of fireproof, waterproof, and deformation-resistant thin plates;

3 is a fireproof, waterproof and anti-deformation digitally painted UV-painted furniture board according to the present invention;

101 is the thick core and long middle plate layer;

102 is a thin-core short-medium plate layer;

201 is a fireproof, waterproof and anti-deformation sheet layer;

301 is a digitally painted UV coating decorative coating.

FIG. 2 is a flow chart of the preparation process of a fireproof, waterproof, and deformation-resistant digitally painted UV-painted furniture board according to the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the embodiments, so that those skilled in the art can implement it with reference to the description.

Embodiment 1 A kind of digital color painting UV coating furniture board with fireproof, waterproof and anti-deformation

A fireproof, waterproof and anti-deformation digital painted furniture panel 3 with a thickness of 17mm; its material layer composition, as shown in accompanying drawing 1 in the specification, is arranged and distributed symmetrically from the center layer to the outside, respectively including: The thick-core and long-medium plate layers 101 located in the central layer are symmetrically superimposed and glued on the two sides of the thick-core long-medium plate layers 101. The fire-proof, waterproof and deformation-resistant sheet layer 201 on the outer surface is symmetrically superimposed on the digital-painted UV coating composite decorative coating 301 on the outer surfaces of the fire-proof, waterproof, deformation-resistant sheet layer 201 on both sides; The finished product has a thickness of about 17mm±0.5mm, which is a conventional thickness specification commonly used for cabinet body panels or cabinet door panels in panel furniture.

The thick core and long middle plate layer 101 located in the central layer has the following main technical features;

(1) The thickness is 7mm, and the thickness deviation should be controlled within ±0.2mm; the specific selection is the pine long-medium board that is integrated and processed by rotary cutting; when the material layer is used, it needs to be sanded with a fixed thickness on both sides. , the grain size of the abrasive belt is 60 mesh to ensure that the thickness deviation is within ±0.2mm;

(2) The moisture content should be controlled at 8-14%;

(3) The appearance quality grade shall not be lower than the superior grade in the industry standard or the market standard or the A grade or the first grade;

(4) When assembling the blanks or splicing the whole sheet, the arrangement of the material layers should ensure that the grain direction of the wood is parallel or consistent with the length direction of the product;

The thin-core short-medium plate layer 102 symmetrically superimposed and glued on the two outer surfaces of the thick-core long-medium plate layer 101 has the following main technical features:

(1) The thickness is 2.6mm, and the thickness deviation is controlled at ±0.1mm; the fast-growing eucalyptus wood is specifically selected as artificial plantation;

(2) The moisture content is controlled at 8-14%;

(3) The appearance quality grade is not lower than the superior grade or A grade or first grade in the industry standard or market standard;

(4) When assembling blanks or whole-sheet splicing, the arrangement of material layers should ensure that the grain direction of the wood is parallel or consistent with the width direction of the product;

The fire-proof, waterproof, and deformation-resistant thin-plate layers 201 symmetrically superimposed and glued on the two outer surfaces of the thin-core short-medium plate layer 102 have the following main technical features:

(1) The thickness is 3.2mm, and the thickness deviation is controlled within ±0.2mm; the material is a mixed cementitious plate material of magnesium sulfate, magnesium oxide and wood fiber (also referred to as magnesium sulfate wood composite plate), in which the proportion of wood fiber is The ratio should be controlled at 4%-10%; its air-dry density should be controlled at 1.0-1.5g/cm ³ ; its combustion performance grade should not be lower than A2;

(2) The moisture content is controlled at 6-12%; its water absorption rate is less than or equal to 15%; its dry shrinkage and swelling rate is less than or equal to 0.2%;

(3) The appearance quality grade is not lower than the superior grade in the industry standard or the market standard or the A grade or the first grade;

(4) Before production and use, the material layer needs to be sanded with a 120-mesh-150-mesh abrasive belt with fixed thickness on both sides to obtain a fine surface effect that can be directly painted, glued, and free of secondary flatness processing. ;

The digitally painted UV coating composite decorative coating 301 symmetrically superimposed on the outer surfaces of both sides of the fire-proof, waterproof and anti-deformation sheet layer 201 has the following main technical features:

(1) According to the order of distribution from the inside to the outside, at least including the primer UV composite coating, digital painting UV composite coating, middle coating UV composite coating and top coating UV composite coating; the overall coating thickness is 0.2mm ;

(2) The above-mentioned primer UV composite coating includes at least 1 layer of roller-coating UV transparent high-penetration primer coating, 1 layer of roller-coating UV transparent high-adhesion primer and roller-coating UV transparent high-adhesion putty composite Coating, 2-layer roll-applied UV transparent ordinary putty and roll-applied UV transparent sanding primer composite coating, 3-layer roll-applied UV white cover primer coating;

(3) above-mentioned digital color painting UV composite coating, at least comprises 1 layer of roller coating UV transparent ink high-adhesion primer coating, 1 layer of spray printing UV digital color painting image ink coating;

(4) above-mentioned middle-coating UV composite coating at least comprises 1 layer of roller coating UV transparent and hardened primer coating, 1 layer of roller coating UV transparent sanding primer coating;

(5) The above-mentioned topcoat UV composite coating at least includes 1 layer of UV transparent topcoat for roller coating before shower, and 1 layer of UV transparent topcoat for shower coating.

The adhesives used for gluing between the thick-core long-medium board layer 101, the thin-core short-medium board layer 102, and the fire-proof and waterproof thin-board layer 201 are all acrylic-modified polyvinyl acetate-based wood inorganic materials from Three Tree Paint Co., Ltd. A dual-purpose formaldehyde-free water-repellent adhesive; it is required that the dipping and peeling performance or waterproof performance of the adhesive layer is not lower than the performance requirements of class III boards, and both wood and inorganic materials are applicable;

A preparation process for a fireproof, waterproof, anti-deformation digitally painted UV-painted furniture board, comprising the following main steps: S1: preparation of a fireproof, waterproof, anti-deformation substrate; S2: coating of a digitally painted UV-painted composite decorative coating; S3 : Covered with scratch-resistant surface protective film. Specifically, it includes the following subdivision steps:

S1: The preparation of fireproof, waterproof and anti-deformation substrate, including the following 12 steps:

S101: double-sided coating of a waterproof formaldehyde-free adhesive on the thick-core long mid-board 101, and the double-sided coating amount is controlled at 400-500 g/m ² ;

S102: Two layers of thin-core short mid-board 102 (without gluing) and one layer of thick-core long mid-board 101 (double-sided gluing), the assembled blank is a three-ply slab blank 1; the specific operations are:

A layer of thin-core short-medium board 102 is placed on top of the worktable provided with the reference edge device (one side is flush with one end); , placed on top of the thin-core short-medium board 102 underneath; finally, on top of the thick-core long-medium board layer 101 with double-sided glue, a thin layer of thin core is placed on the same side. The core short-medium plate 102; the three-layer material combination completed by the above operation steps is a three-clamp slab 1, and the thickness of the three-clamp slab 1 is 12.2 mm.

S103: Quantitative receipt within a time limit

Repeat the above S101 and S102, on the blank assembly table, stack and accumulate multiple groups of three-clamp slab blanks 1 semi-finished product assembly production operation; 120 groups), you can stop the production of blanks, and transfer the piles of blanks to the subsequent cold pressing process; the operation of this process needs to be completed within 2h (that is, the quantitative receiving time is controlled within 120min);

S104: One-time cold pressing and repairing for a limited time

The stack of blanks completed in the above S103 is placed in the cold press equipment specially equipped for this kind of plate, and the cold pressing and gluing and preliminary forming operations are carried out; the unit pressure of cold pressing is controlled at 0.6-0.8MPa; the cold pressing time, Controlled at 0.5-1h; after cold pressing, the flatness repair of the board should be completed within 2h;

S105: One-time hot pressing and gluing for a limited time

After the above S104 is completed, the hot-pressing gluing and forming operations for the three-clamp slab 1 should be completed within 2 hours; the unit pressure of hot pressing is controlled at 0.7-0.9MPa; the unit time of hot pressing is controlled at 1.5min/mm; hot pressing The process curve should not be less than 3 sections, the time of the fast closing section is less than 60s, the time of the pressure relief section should be controlled at 0.5min/mm; the hot pressing temperature should be controlled at 120-125 °C; The rate is within 4%, and the actual thickness of the plate is controlled at not less than 11.7mm;

S106: One-time health maintenance, greasy tonic, fixed thickness sanding

After the above S105 is completed, it needs to be stacked quantitatively, and the top of the pile should be pressed with a weight of not less than 2t, so that the plate can be naturally maintained for 3-5d in the state of load-bearing and flatness, release the stress, and cool it to the environment. Balanced state (temperature, dry humidity) to avoid warping and deformation; then, use a special repair putty to repair the flatness of the board surface; after the repair putty is cured, use a 40-60 mesh abrasive belt to Double-sided fixed thickness sanding is performed on the board surface to ensure that the board surface is smooth and clean; the amount of double-sided sanding is controlled within 0.4mm, and the actual thickness of the board after double-sided fixed thickness is controlled above 11.3mm;

S107: double-sided gluing of the three-plywood blank 1; and single-sided gluing of the fireproof, waterproof, and deformation-resistant sheet 201

After the above-mentioned S106 is completed, double-sided gluing can be performed on the three-plywood blank 1, and the amount of double-sided gluing is controlled at 400-450 g/m ² ; The amount of glue is controlled at 200-220g/m ² ;

S108: One layer of three-plywood blank 1 (double-sided glued) and two layers of fireproof, waterproof and anti-deformation sheet 201 (single-sided glued), the grouped blank is five-plywood blank 2; the thickness of the grouped blank is 17.7mm;

After the above S107 is completed, a layer of three-plywood blank 1 (double-sided glue) and two layers of fireproof, waterproof and anti-deformation sheet 201 (single-sided glue) can be placed on the blank assembly workbench, and the glued surface faces the glued surface. The group blank is five-ply slab blank 2;

When assembling the blanks, first place a layer of fire-proof, waterproof and anti-deformation sheet 201 (single-side glued) on the workbench, and the non-glued plate should face down and the glued plate should face up. Then, place a layer of three-plywood blank 1 (double-sided glue) on top of it; finally, superimpose a layer of glued side down and no glued surface on top of the three-plywood blank 1 (double-sided glued) The upward fireproof, waterproof and deformation-resistant sheet 201; according to the above steps, the production of a group of five plywood blanks 2 can be completed;

S109: Time-limited secondary quantitative receipt

Continue to repeat the operation of S108 above to complete the production of multiple groups of five-clamp slab blanks on the blank group workbench; when the stacking height of the five-clamp slab group blank stack reaches 1.5m-1.6m (about 90 groups), you can Stop the production of blanks, and transfer the stacks of blanks to the subsequent cold-pressing process; the operation of this process needs to be completed within 2 hours (that is, the quantitative receiving time is controlled within 120 minutes).

S110: Time-limited secondary cold pressing and repair

Place the stack of blanks completed in the above S109 into the cold press equipment specially equipped for this type of sheet, and perform cold pressing and gluing and preliminary forming operations; the unit pressure of cold pressing is controlled at 0.6-0.8MPa, and the cold pressing time is controlled at 0.5-1h; but after cold pressing, it is not necessary to repair the flatness of the board surface;

S111: Time-limited secondary hot pressing and gluing

After the above S110 is completed, it is necessary to complete the operation of hot pressing, gluing and forming of the five-ply slab blank within 2 hours; the unit pressure of hot pressing is controlled at 0.7-0.9MPa, the unit time of hot pressing is controlled at 1.5min/mm, and the hot pressing The process curve should not be less than 3 sections, the time of the fast closing section should be less than 60s, the time of the pressure relief section should be controlled at 0.5min/mm, and the hot pressing temperature should be controlled at 115-120 °C; after the hot pressing is completed, The compression rate of the plate is within 2%, and the actual thickness is above 17.3mm.

S112: Time-limited secondary health care, greasy repair, sanding with fixed thickness, sawing edge

After the above S111 is completed, it needs to be stacked quantitatively, and the top of the pile should be pressed with a weight of more than 2t, so that the plate can be naturally maintained for 3-5d under the state of load-bearing and flatness, release the stress, and cool it to balance with the environment. state (temperature, dry humidity) to avoid the problem of warping and deformation; then, roll-coat the special repair putty for furniture boards to repair the flatness of the board surface of the five-ply slab blank (2). After the putty is cured, it is transferred to the setting In the thick sanding process, use an abrasive belt with a grain size of 150-240 mesh to perform double-sided fixed-thickness sanding on the board surface to ensure that the board surface is smooth and clean; the sanding amount of double-sided fixed-thickness sanding is 0.3mm, and the double-sided sanding The actual thickness of the plate after light is 17.0±0.1mm;

After the above process steps are completed, the board can be sawed as needed, and the excess material on the edge is cut and removed to ensure that no debris such as board surface garbage will be generated when the board enters the subsequent coating process; the sawing process requirements, It can be implemented with reference to the conventional technical scheme; the sawing process should use a special saw blade for cutting inorganic plates.

S2: Coating digital painting UV coating composite decorative coating 301: Sanding the five-plywood slab obtained from S112 with a 240-320 mesh abrasive belt on both sides with fixed thickness, and according to the composition and distribution order of each coating layer The two sides of the board are coated with primer UV composite coating, digital color painting UV composite coating, middle coating UV composite coating, and top coating UV composite coating. The thickness of the plate after topcoating is 17.4±0.1mm, wherein the roller-coating UV transparent high-penetration primer coating in the primer UV composite coating is the first coating of the entire composite coating, and the roller coating The total coating amount of UV transparent high-penetration primer is 60-75g/m ² , which needs to be coated in three times, and the single coating amount is controlled at 20-25g/m ² . For curing and drying of UV lamp equipment, the curing energy is controlled at 200-400mJ/cm ² , and the curing degree is controlled at 70-80%;

The roller-coating UV transparent high-penetration primer must be able to adapt to the interface characteristics of wood, inorganic and composite, mixed, homogeneous, and heterogeneous fine surface materials, and has good gluing and fusion properties for UV coatings. , the specific selection is the BM-G 001-FZ type roller coating UV transparent penetrating primer of Three Tree Coatings Co., Ltd., or the commercially available roller coating UV transparent penetrating primer coating with similar performance;

S3: Coating of surface anti-scratch PE protective film: coating the decorative surface 301 of its digitally painted UV coating with surface anti-scratch PE protective film. The pressure only needs to maintain an appropriate amount of slight pressure to prevent crushing or crushing the paint film of the board; the surface anti-scratch PE protective film has a thickness of 0.04-0.06mm, the inner surface is glued, and should be easy to wrap , Adhesion, tearing or clearing of the transparent PE surface protective film; and when the PE protective film unfolds the coating operation, it needs to be contacted by the needle roller and pierced on the plane of the surface protective film with a pore size of 0.5- 1mm ventilation holes, so that the slight ink or paint odor left by the digitally painted UV coating composite decorative coating after the product is coated can still be emitted from the ventilation holes on the surface protective film on the board surface and volatilize. Make sure that the odor level of the product can be cooled in a short time after the product is finished production, and reach the clean odor level (odor level ≤ 2), and the detection index of volatile organic compounds can reach the lowest level in a short time after production. The level is stable and balanced; the coated surface anti-scratch PE protective film needs to be torn off or removed at the last link of product use or installation.

The fireproof, waterproof and anti-deformation digitally painted UV-painted furniture board with a thickness of 17mm prepared in Example 1 has a fire resistance rating of ≥1.0h, and its combustion performance grade is B1-C grade; its impregnation and peeling performance can pass Class III boards The 24h water absorption thickness expansion rate is ≤4%, its 24h water absorption rate is ≤30%, and the water impermeability test results meet the national standards; the warpage deformation of the board surface is ≤0.1%, and the maximum deformation of the board surface is ≤0.1%. Arch height ≤ 2mm; the mass production rate of high-quality products is more than 98%, and other quality properties of the product can also meet the performance requirements of furniture panels, wall panels, door panels and other household boards, with a high level of quality, and excellent fireproof and waterproof and deformation resistance.

Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and the embodiments, and can be applied to various fields suitable for the present invention. For those skilled in the art, it is easy to Therefore, the invention is not limited to the specific details without departing from the general concept defined by the appended claims and the scope of equivalents.

Claims (6)

1. The utility model provides a digital colored drawing UV of fire prevention waterproof resistance to deformation scribbles furniture board which characterized in that, this furniture board (3) thickness is 12-25mm, includes respectively: the composite decorative coating comprises a thick-core long middle plate layer (101) positioned on a central layer, and a thin-core short middle plate layer (102), a fireproof and waterproof deformation-resistant thin plate layer (201), a digital colored drawing UV coating composite decorative coating (301) which are symmetrically glued on the surfaces of two sides of the thick-core long middle plate layer (101) in sequence from inside to outside;

the thickness of the digital colored drawing UV coating composite decorative coating (301) is 0.1-0.2mm, and the digital colored drawing UV coating composite decorative coating at least comprises a bottom coating UV composite coating, a digital colored drawing UV composite coating, a middle coating UV composite coating and a top coating UV composite coating in the distribution arrangement order from inside to outside;

the priming coat UV composite coating at least comprises the following components in distribution and arrangement order from inside to outside: 1 layer of roller coating UV transparent high-permeability primer coating, 1 layer of roller coating UV transparent high-adhesion primer and roller coating UV transparent high-adhesion putty composite coating, 2 layers of roller coating UV transparent common putty and roller coating UV transparent sanding primer composite coating, and 2-3 layers of roller coating UV white covering primer coating or roller coating UV color-repairing primer coating;

the digital colored drawing UV composite coating at least comprises the following components in distribution and arrangement sequence from inside to outside: 1 layer of roller painting UV transparent ink high adhesion primer coating, 1 layer of spray printing UV digital colored drawing decorative design or digital colored drawing image ink coating;

the intermediate coating UV composite coating at least comprises the following components in the distribution and arrangement order from inside to outside: 1 layer of roller coating UV transparent hardening primer or wear-resistant primer coating, and 1 layer of roller coating UV transparent sanding primer coating;

the topcoat UV composite coating at least comprises: 1, coating a UV transparent finish coat by roller before spraying, and 1 spraying a UV transparent finish coat; or at least comprises 2 roller coating UV transparent finish coatings; or at least comprises 1 roller coating UV transparent skin-feel finishing coat; or at least comprises 1 roller coating UV transparent laser roller finishing coat.

2. The fireproof, waterproof and deformation-resistant digital painted UV furniture board as claimed in claim 1, wherein the thick-core long and medium board layer (101) has a water content of 8-14%, a thickness of 5-14mm, and a thickness deviation of +/-0.2 mm, and when in use, the board needs to be sanded with fixed thickness and fixed thickness on both sides, and the abrasive belt has a particle size of 60 meshes; when the thickness is 5-10mm, the whole pine long middle plate which is processed in a rotary cutting mode is preferably selected; when the thickness is 10-14mm, the formaldehyde-free solid wood jointed board which is formed by whole wood, is processed by saw cutting, is spliced by finger joint or butt joint in length, is spliced and glued by butt joint in width is preferably selected, and the material is any one of pine, cedar, poplar or albizia chinensis.

3. The fire-proof, water-proof and deformation-resistant digital painted UV furniture board as claimed in claim 1, wherein the moisture content of the thin core short and medium board layer (102) is 8-14%, the thickness is 1.5-3.5mm, and the thickness deviation is controlled within ± 0.1 mm; the material is selected from one of fast-growing poplar or eucalyptus.

4. The fire-proof, water-proof and deformation-resistant digital UV-painted furniture board as claimed in claim 1, wherein the moisture content of the fire-proof, water-proof and deformation-resistant sheet layer (201) is 6-12%, the water absorption rate should be less than or equal to 15%, and the air-dry density is 1.0-1.5g/cm ³ The dry shrinkage and wet expansion rate is less than or equal to 0.2 percent, the thickness is 3.0-4.0mm, the thickness deviation is preferably controlled to be +/-0.2 mm, and when the abrasive belt is used, the abrasive belt with the granularity specification of 120-150 meshes is adopted for double-sided fixed-thickness sanding treatment; the material is a gelled flat plate material formed by mixing a flame-retardant gelled material and wood fibers, wherein the flame-retardant gelled material is one or more of magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum hydroxide, calcium silicate and calcium carbonate.

5. The process for preparing the fire-proof, water-proof and deformation-resistant digital painted UV-coated furniture board as claimed in any one of claims 1 to 4, comprising the steps of:

s1: preparing a fireproof waterproof deformation-resistant base material:

s101: to thick core long middle plate(101) Performing double-sided gluing with the total amount of 400-500g/m ² ；

S102: respectively overlapping and gluing two thin core short middle plates (102) on the lower surface and the upper surface of a thick core long middle plate (101) with double surfaces glued with glue in a flush and edgewise manner, controlling the wood texture direction of the thick core long middle plate to be consistent with the length direction of a plate blank, and controlling the wood texture direction of the thin core short middle plate to be consistent with the width direction of the plate blank, so as to form a three-sandwich plate blank (1);

s103: receiving materials quantitatively in a time-limited manner: stacking a plurality of groups of three-sandwich plate blanks (1) until the height reaches 1.0-1.6m, and then transferring to a subsequent cold pressing process, wherein the operation completion time is controlled within 2 h;

s104: limited-time primary cold pressing and repairing: cold pressing for 0.5-1h under the unit pressure of 0.6-0.8MPa, and finishing the flatness repair of the plate surface within 2 h;

s105: time-limited one-time hot pressing and glue synthesis molding: hot-pressing, gluing and molding the three-sandwich plate blank (1) under the conditions that the temperature is 115-125 ℃ and the unit pressure is 0.7-0.9MPa, wherein the unit time of hot pressing is controlled to be 1.2-1.5min/mm, the hot-pressing process curve is more than or equal to 3 sections, the time of a quick closing section is less than 60s, and the unit time of a pressure-releasing and moisture-removing section is controlled to be 0.3-0.5 min/mm; the total completion time of the process is controlled within 2 h;

s106: time-limited one-time health preserving, putty repairing and fixed-thickness sanding: quantitatively stacking the three-splint blanks (1), stacking and compacting the three-splint blanks by using a weight not less than 2t, naturally curing the three-splint blanks for 3-5d in a load-bearing and flatness state, releasing stress, and naturally cooling the three-splint blanks to avoid warping deformation; then, roller coating special repair putty for the furniture board, and performing flatness repair on the board surface of the three-sandwich board blank (1); after the putty is cured, sanding the two sides of the board surface with a sanding belt with the granularity specification of 40-60 meshes to ensure that the board surface is smooth and clean;

s107: the double-sided gluing is carried out on the three-clamping plate blank (1), and the quantity of the double-sided gluing is controlled to be 400-450g/m ² (ii) a And the fireproof, waterproof and anti-deformation thin plate (201) is glued on one side, and the gluing amount of the one side is controlled to be 200-220g/m ² ；

S108: the glued surfaces of the two fireproof, waterproof and deformation-resistant thin plates (201) are respectively overlapped and glued below and above the three double-sided glued sandwich plate blank (1) in a flush manner to form a five-sandwich plate blank (2);

s109: receiving materials in a time-limited secondary quantitative manner: stacking a plurality of groups of five-sandwich plate blanks (2) until the height reaches 1.0-1.6m, and then transferring to a subsequent cold pressing process, wherein the operation completion time is controlled within 2 h;

s110: and (4) cold pressing for the second time in limited time: cold pressing for 0.5-1h under the unit pressure of 0.6-0.8 MPa;

s111: time-limited secondary hot pressing and glue synthesis molding: under the conditions that the temperature is 115-125 ℃ and the unit pressure is 0.7-0.9MPa, the five-sandwich plate blank (2) is subjected to hot-pressing gluing and molding, the unit time of hot pressing is controlled to be 1.2-1.5min/mm, the hot-pressing process curve is more than or equal to 3 sections, the time of a quick closing section is less than 60s, and the unit time of a pressure-releasing and moisture-removing section is controlled to be 0.3-0.5 min/mm; the total completion time of the process is controlled within 2 h;

s112: time-limited secondary health preserving, putty repairing, fixed-thickness sanding and edge sawing: quantitatively stacking the five-splint blanks (2), stacking and compacting the five-splint blanks by using a weight not less than 2t, naturally curing the five-splint blanks for 3-5d in a load-bearing and flatness state, releasing stress, and naturally cooling the five-splint blanks to avoid warping deformation; then, roller coating special repair putty for the furniture board, and performing flatness repair on the board surface of the five-sandwich board blank (2); after the putty is cured, transferring to a fixed-thickness sanding process, sanding the two sides of the board surface by using an abrasive belt with the granularity specification of 150-;

s2: coating a digital colored drawing UV coating composite decorative coating (301): sanding the five-sandwich plate blank (2) obtained in the step S112 by using an abrasive belt with the granularity specification of 240-one 320 meshes, and sequentially coating a bottom coat UV composite coating, a digital colored drawing UV composite coating, a middle coat UV composite coating and a top coat UV composite coating on the plate surfaces on the two sides of the abrasive belt according to the composition and distribution sequence of each coating, wherein the roller coat UV transparent high-permeability primer coating in the bottom coat UV composite coating is the first coating of the whole composite coating, and the total coating amount of the roller coat UV transparent high-permeability primer is 60-75g/m ² The coating needs to be carried out for three times, and the amount of single coating is controlled to be 20-25g/m ² After the three-time coating is completed in series, curing and drying are carried out through a UV lamp device, and the curing energy is controlled to be 200-400mJ/cm ² The curing degree is controlled to be 70-80%;

s3: the surface of the coating is scratch-resistant PE protective film.

6. The preparation process of the fireproof, waterproof and deformation-resistant digital painted UV coated furniture board as claimed in claim 5, wherein the surface scratch-resistant PE protective film is a transparent PE surface protective film which is 0.04-0.06mm thick, has an inner surface with glue, and is easy to coat, adhere, tear or remove, the coating mode is streamline rolling and surface coating, and the pressure of a contact roller only needs to keep a proper amount of slight pressure to prevent the board surface paint film from being crushed or damaged; when the PE protective film is subjected to surface scratch prevention coating operation in rolling coating operation, a plurality of air vents with the aperture of 0.5-1mm are punctured on the plane of the surface protective film through the contact of a needle roller so as to volatilize residual hot air and smell of the coating of the plate and escape and remove a very small amount of volatile substances contained in the coating, and the smell grade of the plate after cooling can reach a pure smell grade (less than or equal to 2 grade).

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