CN114800725A

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

Info

Publication number: CN114800725A
Application number: CN202210383623.6A
Authority: CN
Inventors: 洪杰; 梁长里; 施连军; 常庆华; 周勇
Original assignee: Xiaosen New Material Technology Co ltd
Current assignee: Xiaosen New Material Technology Co ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-07-29

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 deformation-resistant digital colored drawing UV (ultraviolet) coating scientific furniture board and preparation process thereof

Technical Field

The invention belongs to the technical field of furniture materials, and particularly relates to a fireproof, waterproof and deformation-resistant digital color-painted UV-coated scientific furniture board and a preparation process thereof.

Background

The digital colored drawing UV coating furniture board is a coating wood decorative board which is mainly used for manufacturing board type or board wood furniture and other furniture purposes and is prepared by taking an artificial board plain board or a decorative veneer veneered artificial board as a base material and processing the surface through artistic design and an intelligent digital coating process. Also known as: intelligent digital coating furniture board. The novel home decoration material is a new home decoration material which is gradually developed in China in recent years, and is popular among furniture manufacturers, decoration companies and consumers due to the advantages of high simulation degree and natural authenticity of surface decoration patterns, texture textures and colors, excellent designability, rapid customized production and delivery, environmental friendliness, standardization, scale, customization or personalized production and delivery and the like. The product application is popularized to the application fields of cabinet, wall, door, ground, roof and other whole household spaces and different application scenes.

However, in the existing product system of the digital painted UV coated furniture board, the traditional digital painted UV coated furniture board using the solid wood multilayer plywood or the veneer veneered plywood as the base material has the following problems:

(1) resistance to deformation problems

The traditional digital painting UV coated furniture board using solid wood multilayer plywood or decorative veneer veneered plywood as a base material is characterized in that wood veneer (long middle plate and short middle plate) layer materials of the wood multilayer plywood base material are processed by artificial fast-growing forest wood, the artificial fast-growing forest wood can be formed in 4-6 years because of the extremely high growth speed of trees, although the wood resources are rich in sources, the supply period is short, the price cost is advantageous, but a large amount of growth stress exists and remains in the wood, the stress is not easy to eliminate, and the problems of warping deformation, cracking and the like of wood products are easily caused. Therefore, the digital color painting UV coating furniture board which is prepared by adopting the artificial fast-growing forest wood and takes the solid wood multilayer plywood and the decorative veneer thereof as the base material has the problems of poor deformation resistance and easy risk of warping deformation of products and products; when the length or height dimension of the wardrobe door plate and the like exceeds more than 1.8m, the deformation resistance of the plate or a finished product part thereof needs to be improved, and special treatment such as deformation resistance strips needs to be used or installed, so that the stability of the dimension and the appearance structure of the product or the product can be ensured; however, such treatments not only increase the production cost, but also only address the symptoms and root causes, and do not completely eliminate the risk of dimensional and profile deformation caused by the long-term release of residual growth stresses in the wood material and its board products.

(2) Optimized promotion and balance consideration of moisture-proof, waterproof and fireproof flame-retardant properties

The traditional digital colored drawing UV coating furniture board taking a solid wood multilayer plywood or a decorative veneer veneered plywood as a base material has no flame retardant treatment if the material is not subjected to flame retardant treatment, although the product has good moisture-proof and waterproof properties, the product does not have the flame retardant property, and the product can not be used in the application fields such as customized furniture and decorative finishing of high-rise buildings and public places with requirements on the flame retardant property; if the material of the product is subjected to flame retardant treatment, such as adding a flame retardant treatment agent into wood or using a flame retardant binder, the moisture and water resistance of the product is reduced, and the product cannot be used in areas, use environments or application scenes where humidity or moisture is obviously frequent; in short, the problems that the moisture-proof and waterproof performance and the flame-retardant and fireproof performance of different degrees are difficult to be considered and need to be improved exist.

(3) Long production flow, long production period, complex process, high production cost and large amount of labor

The traditional digital painting UV coated furniture board taking a solid wood multilayer plywood or a decorative veneer veneered plywood as a base material can ensure the quality of the digital painting or spray printing effect (such as resolution, definition, printing accuracy, simulation degree, printing and coating appearance defects and the like) of a decorative flower image layer only by ensuring the flatness of the surface of the board because the technical requirement of the printing and coating integrated process of the digital painting UV coating of the post-process needs to be met; therefore, the flatness and the surface characteristics of the base material can meet the technical requirements of the printing and coating integration technology only by adopting multiple assembly, multiple repair, multiple fixed-thickness sanding (the molding times are more than 4), and pressing and pasting at least two layers of veneers on the surface; not only is limited by the restriction of veneering veneer resources, but also causes the production process flow to be excessively complicated and the production period and delivery period to be longer; the method is not beneficial to embodying the product characteristics and technical advantages of the digital colored drawing UV coating process technology, such as rapid design, rapid production and delivery, and causes troubles in the problems of increased manufacturing and production cost, increased labor consumption and recruitment of workers, difficult mechanization and automation and the like.

Disclosure of Invention

Aiming at the defects of the existing product system of the digital color painting UV coated furniture board, the invention aims to provide a fireproof, waterproof and deformation-resistant digital color painting UV coated furniture board and a preparation process thereof.

The technical scheme of the invention is summarized as follows:

the utility model provides a digital colored drawing UV application furniture board of fire prevention waterproof resistance to deformation, includes respectively: the composite decorative coating comprises a thick-core long middle plate layer positioned in a center layer, and a thin-core short middle plate layer, a fireproof waterproof anti-deformation thin plate layer and a digital color painting UV coating composite decorative coating which are sequentially and symmetrically glued on two side surfaces of the thick-core long middle plate layer from inside to outside; the thickness of the furniture plate formed by stacking and gluing the material layers is 12-25mm, and the requirements of various conventional applications such as plate furniture cabinets, cabinet doors and the like on thickness and dimension specifications can be met;

the thickness of the digital colored drawing UV coating composite decorative coating 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 according to the distribution arrangement sequence 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 layer of roller coating UV transparent skin-feel finishing coat; or at least comprises 1 roller coating UV transparent laser roller finishing coat.

Preferably, the water content of the thick core long and medium plate layer is 8-14%, the thickness is 5-14mm, the thickness deviation is controlled within +/-0.2 mm, the appearance quality grade is not lower than the superior grade or A grade or first grade in the industry standard or market standard, when the thick core long and medium plate layer is used, double-sided fixed-thickness sanding is needed, the grain size specification of a sanding belt is 60 meshes, and when the thick core long and medium plate layer is assembled or spliced in a whole piece, the arrangement mode of the thick core long and medium plate layer is ensured to ensure that the grain direction of wood is parallel to or consistent with the length direction of a product; 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.

Preferably, the moisture content of the thin core short and medium plate layer is 8-14%, the thickness is 1.5-3.5mm, the thickness deviation is controlled to be +/-0.1 mm, the appearance quality grade is not lower than the excellent grade or A grade or first grade in the industry standard or market standard, and the arrangement mode of the thin core short and medium plate layer is to ensure that the grain direction of the wood is parallel to or consistent with the length direction of the product when the thin core short and medium plate layer is assembled or spliced; the material is selected from one of fast-growing poplar or eucalyptus.

Preferably, the fireproof, waterproof and deformation-resistant sheet layer has a water content of 6-12%, a water absorption rate of 15% or less, and an air-drying density of 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 coating is used, a 120-150-mesh abrasive belt with the granularity specification is adopted for double-sided fixed-thickness sanding treatment so as to obtain a fine surface effect which can be directly coated, glued and free of secondary flatness processing; the grade of combustion performance is not lower than A2;

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; the wood fiber accounts for 4-10% of the total weight of the wood fiber.

A preparation process of a fireproof, waterproof and deformation-resistant digital UV-painted furniture board comprises the following steps:

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

s101: coating adhesive on the thick-core long middle plate on two sides, wherein the total amount of the adhesive coated on the two sides is 400-fold and 500g/m ² ；

S102: respectively overlapping and gluing the two thin-core short and middle plates on the lower surface and the upper surface of the thick-core long and middle plate with double-sided glue in a flush and edgewise manner, controlling the wood texture direction of the thick-core long and middle plate to be consistent with the length direction of the plate blank, and controlling the wood texture direction of the thin-core short and middle plate to be consistent with the width direction of the plate blank, so as to form a three-clamping plate blank; the method specifically comprises the following steps: a layer of thin core short middle plate is arranged on a workbench provided with a reference edge device (one edge is aligned with one end of the workbench) in an aligned mode; then, the thick core long middle plate with double surfaces glued in advance is placed on the thin core short middle plate under the bottom in a neat and side manner; finally, placing a thin core short middle plate layer on the thick core long middle plate layer with double-sided glue coating in a neat and edgewise manner, and finishing the assembly production of a group of three-clamp plate blanks;

s103: receiving materials quantitatively in a time-limited manner: stacking a plurality of groups of three-splint blanks until the height reaches 1.0-1.6m (100-150 groups), and then transferring to the subsequent cold pressing process, wherein the operation completion time is controlled within 2 h;

s104: limited-time primary cold pressing and repairing: placing the group blank pile obtained in the step S103 into cold press equipment, and performing cold pressing gluing and primary forming operation; the unit pressure of cold pressing is controlled to be 0.6-0.8MPa, and the cold pressing time is controlled to be 0.5-1 h; after cold pressing, the flatness repairing of the plate surface needs to be completed within 2 hours;

s105: time-limited one-time hot pressing and glue synthesis molding: hot-pressing, gluing and molding the three-splint blank 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: quantitatively stacking the three-splint blanks, stacking and compacting the three-splint blanks by using a weight not less than 2t, naturally curing the three-splint blanks for 3-5d under the states of bearing and flatness, releasing stress, and naturally cooling the three-splint blanks to a state (temperature and humidity) balanced with the environment to avoid warping and 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; 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-splint blank, and the double-sided gluing amount is controlled to be 400-sand 450g/m ² (ii) a And to sheet the fireproof, waterproof and deformation-resistant sheetsThe glue is coated on the surface, and the single-side glue coating amount is controlled to be 200- ² ；

S108: respectively overlapping and gluing the glued surfaces of the two fireproof waterproof deformation-resistant thin plates in a flush manner on the lower surface and the upper surface of the double-sided glued three-sandwich plate blank to form a five-sandwich plate blank; the method specifically comprises the following steps: when assembling, firstly, a layer of fireproof, waterproof and deformation-resistant sheet (single-side gluing) is arranged on a workbench in a neat and edgewise manner, and the sheet is arranged in a way that the surface without gluing faces downwards and the surface with gluing faces upwards; then, a layer of three-sandwich plate blank (double-sided gluing) is superposed and placed on the upper surface of the plate blank; finally, a layer of fireproof, waterproof and deformation-resistant thin plate with the glue coating surface facing downwards and the non-glue coating surface facing upwards is superposed on the three-sandwich plate blank (double-sided glue coating), and then the assembly production of a group of five-sandwich plate blanks can be completed;

the adhesives used for gluing the thick-core long and medium plate layer, the thin-core short and medium plate layer and the fireproof and waterproof thin plate layer are acrylic acid modified polyvinyl acetate ester wood inorganic dual-purpose aldehyde-free added waterproof adhesives of three-tree paint company Limited or commercially available adhesives with similar performance; the dipping and peeling performance of the glue layer is required to be not lower than that of the III-type plate, and the glue layer can be suitable for both wood and inorganic materials;

s109: receiving materials in a time-limited secondary quantitative manner: stacking a plurality of groups of five-splint blanks 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-splint blank 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, fixed-thickness sanding and edge sawing: quantitatively stacking the five-splint blanks, stacking and compacting the five-splint blanks by using a weight not less than 2t, naturally curing the five-splint blanks for 3-5d under the states of bearing and flatness, releasing stress, and naturally cooling the five-splint blanks to a state (temperature and humidity) balanced with the environment to avoid warping and 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; after the putty is cured, the putty is transferred to a fixed-thickness sanding process, an abrasive belt with the granularity of 150-plus-240 meshes is used for sanding the two surfaces of the plate in a fixed thickness, so that the plate is ensured to be flat and smooth, the plate is sawed and processed as required, and the redundant part of the material at the edge part is cut off, so that the plate is ensured not to generate impurities such as plate surface garbage and the like when entering the subsequent coating process; the sawing process is suitable for cutting special saw blades by using inorganic plates;

s2: coating a digital colored drawing UV coating composite decorative coating: sanding the five-layer plywood blank obtained in the step S112 by using an abrasive belt with the granularity specification of 240-one-320 meshes, and sequentially coating 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 on the two side plate surfaces of the abrasive belt according to the composition and distribution sequence of each coating, wherein the roller-coating UV transparent high-permeability primer coating in the bottom-coating UV composite coating is the first coating of the whole composite coating, and the total coating amount of the roller-coating 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%;

the roller coating UV transparent high-permeability primer must be suitable for interface characteristics of wood, inorganic materials and composite, mixed, homogeneous and heterogeneous fine surface materials thereof, has good gluing and fusion performance on a UV coating, and is specifically a roller coating UV transparent permeable primer of BM-G001-FZ model of three trees coatings company Limited or a commercially available roller coating UV transparent permeable primer coating with similar performance;

s3: coating a surface scratch-proof PE protective film, wherein the coated surface scratch-proof PE protective film needs to be torn off and removed in the final link of product use or installation; the coating of the surface scratch-proof PE protective film needs to be carried out when the protective film is in coating operation, a plurality of air holes with the aperture of 0.5-1mm are pierced through by the needle roller in contact with the surface of the surface protective film, so that the odor of the residual light printing ink or paint of the digital colored drawing UV coating composite decorative coating of the product after coating and the residual hot air can still be emitted from the air holes on the surface protective film on the plate surface and volatilized completely, the odor grade of the product can be cooled in a short time and reaches the net odor grade (the odor grade is less than or equal to 2 grade) after the product is produced, and the detection index of the volatile organic compound can reach the stable balance state of the lowest level in a short time after delivery.

Preferably, the surface scratch-proof PE protective film is a transparent PE surface protective film which is 0.04-0.06mm thick, has glue on the inner surface, and is easy to coat, adhere, tear or clear, the coating mode is assembly line rolling and veneering coating, the pressure of a contact roller only needs to keep a proper amount of slight pressure, and the surface paint film is prevented from being crushed or damaged.

The design principle of each material layer structure of the product and the preparation process thereof and the principle of solving the target problem mainly comprise the following steps:

1. design principle of thick core long medium-thick plate layer and design function and action thereof

(1) The material layer positioned in the central layer is designed into a thick-core long middle plate, so that the performance of ideally eliminating the residual growth stress of the fast-growing wood and resisting the buckling deformation problem of products and products thereof is realized;

(2) when the thickness of the thick core is 5-14mm, the product and the product thereof have the performance of eliminating the residual growth stress of wood growth and resisting warping deformation, and are more ideal.

Moreover, when the thickness is 5-10mm, a whole-sheet rotary cutting processing mode is adopted, a plurality of fine processing cracks which do not penetrate through the thickness of the board surface can be formed on the surface of the thick-core long middle board, which is equivalent to a plurality of grooves for eliminating stress which are artificially processed, and the stress release is facilitated, so that the problem of residual wood growth stress of the thick-core long middle board basically does not exist, and the long-term good dimensional stability and deformation resistance are obtained; among them, in the comparison tests of various material effects, the deformation-resistant effect of the whole rotary-cut thick-core long middle plate of the pine is found to be the most ideal;

when the thickness is 10-14mm, the saw cutting splicing lath is adopted to splice the length in the length direction through finger joint or flat joint, and the width is spliced in the width direction through gluing, so that the finally prepared thick-core long middle plate also has ideal performance of eliminating the residual stress of wood growth and resisting the buckling deformation of wood products; the processing mode is equivalent to that the original wood is firstly subjected to small-size decomposition and then is assembled and glued into a large-size material layer, and the effect of eliminating the residual growth stress of the wood growth is very good; among them, in the comparison tests of various material effects, the anti-deformation effect of the whole thick-core long middle plate integrally glued by the sawing laths of poplar, fir and pine is found to be the most ideal.

(3) Through a large number of experiments, the similar effect can be obtained when the thickness is less than 5mm or more than 14mm by selecting the same processing mode and material using process. However, when the thickness of the thick core long middle plate is less than 5mm or more than 14mm, the overall effect of the material layer after being combined with the subsequent thin core short middle plate layer and the waterproof, fireproof and deformation-resistant thin plate layer is relatively unstable. Therefore, the thickness of the thick core middle plate layer is limited to 5-14 mm.

(4) In addition, the arrangement of the thick-core long middle plate also ensures that the thickness of the wood material layer accounts for at least more than 50% in the whole material of the product, so that the product inherits the light weight, large strength-weight ratio, good mechanical property and easy processing of the solid wood multilayer plywood material, and is convenient for better processing properties in various aspects such as cutting, drilling, slotting, nailing, edge sealing and the like.

2. Design principle of thin core short and medium plate layer, and design function and function thereof

(1) The arrangement of the thin core short middle board layer can increase the thickness and the thickness ratio of the wood material layer after being glued with the thick core long middle board layer, and further optimize and improve the processing performance and the physical and mechanical performance of the whole product; on the other hand, the wood material layer is endowed with the integral product and the product thereof, and simultaneously has transverse textures and longitudinal textures, so that the anisotropy of the wood material layer is optimized and improved, and the deformation resistance of the product and the product is improved.

(2) In addition, the obligees of the invention also find that the thickness of the thin core short and medium plate is limited within the range of 1.5-3.5mm through a large number of experiments, and the invention has more ideal industrialization prospect, operability and practicability; the thickness is too thin or less than 1.5mm, and the contribution to improving the anisotropy and the deformation resistance of the whole product and the product thereof is not obvious enough; the thickness is too thick or more than 3.5mm, the processing difficulty of raw material processing is increased, the outturn rate, the high-quality product rate and the utilization rate are greatly reduced, and the industrial production and the resource acquisition are not facilitated.

3. Design principle of fireproof, waterproof and deformation-resistant sheet layer, and function and effect thereof

(1) Fire-proof and flame-retardant function and principle

The fireproof, waterproof and deformation-resistant sheet layers are arranged on the outermost two layers of the base material layer, so that on one hand, two layers of materials with A2-grade fireproof and non-combustible performance can be given to the product on the basis of the material structure design of the whole product, and the flame retardant performance of the whole product is improved; on the other hand, the thickness of the fireproof, waterproof and deformation-resistant sheet layer is set to be 3.0-4.0mm, and a large number of tests prove that the material layer with the thickness range can endow the whole product with the limit performance of the fire-resistant time of more than 1h, can meet the requirement of national standards on the building design fireproof standard, and cannot cause overlarge adverse effects on the processing performance and other quality performances of the product.

If the thickness of the material layer is too thick, the weight and the density of the product can be increased, and the use performances of downstream users in secondary processing such as edge sealing, cutting, slotting, drilling, nailing and the like can be affected. If the thickness is too thin, the limit of the fire endurance cannot meet the higher requirement of the fire endurance performance of part of application scenes.

The principle of fire prevention and flame retardance of the material layer lies in that the non-combustible and flame retardant properties of magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum oxide, diatomite and inorganic filler components are utilized, and the material dosage of combustible wood fibers or wood particles is controlled within 10%, so that the combustion property of the whole product is not lower than B1 level. The flame retardant mechanism is an oxide layer which can be decomposed to generate oxygen blocking when being heated, and protective layers such as water, inert gas and the like.

(2) Waterproof and moistureproof function and principle

The fireproof, waterproof and deformation-resistant thin plate layer is used for replacing two outermost layers of wood of a traditional multilayer plywood base material layer, on one hand, the thickness and dosage of the wood layer of the whole product can be reduced by about 30-50%, the water absorption thickness expansion rate and the dry shrinkage and wet expansion rate of the whole product are greatly reduced, and the waterproof and moistureproof performance of the product is improved; on the other hand, the board surface of the whole product, which is in contact with the outside, can be replaced by the compact and homogeneous wood inorganic composite material with smaller hygroscopicity, so that the capability of the whole product for absorbing or releasing water or moisture to the environment is reduced, and a better moisture-proof effect is achieved.

The principle of the waterproof and moistureproof material layer is mainly characterized in that the low moisture absorption performance, the low water absorption performance and the low wet swelling and dry shrinkage performance of magnesium sulfate, magnesium oxide, magnesium hydroxide, aluminum oxide, diatomite and inorganic filler components are utilized, and the material consumption of wood fiber or wood particles with higher water absorption, moisture absorption and dry shrinkage and wet swelling rate is controlled within 10%, so that the integral product has excellent waterproof and moistureproof performance.

(3) Anti-deformation function and principle

Through the material structure design based on the center layer symmetry principle, two layers of materials on the outermost layer of the base material are replaced by wood to form a fireproof, waterproof and anti-deformation thin plate layer made of inorganic wood composite materials, so that on one hand, the stronger dimensional stability and anti-deformation performance of the fireproof, waterproof and anti-deformation thin plate made of inorganic wood composite materials are utilized; on the other hand, the technical balance point problem of the three factors of fireproof flame retardant property, waterproof and moistureproof performance and deformation resistance to the thickness of the material is considered; through a large number of comparison tests, the thickness of the material layer is limited to 3.0-4.0mm finally, so that the technical requirements of deformation resistance on the material are met while better waterproof, moistureproof and fireproof flame-retardant properties are obtained.

The principle of deformation resistance of the material layer lies in that the inorganic wood composite material is fully utilized, the inorganic wood composite material is a material with homogeneous compactness, small hygroscopicity and low water absorption, the influence of factors such as environmental temperature, humidity and internal stress is small, the board surface is relatively flat, bending deformation is not easy to generate, and the material rigidity is outstanding, and the wood plywood which is easy to generate buckling deformation is coated and glued from two side surfaces to form an integral product, so that the core layer of the plywood positioned in the middle has the traction of a fireproof waterproof deformation-resistant thin plate layer when the core layer of the plywood generates buckling deformation or is positioned under an easily deformable environment, thereby greatly reducing the buckling deformation rate of the integral product and improving the deformation resistance of the integral product.

(4) Function and principle of wood veneer layer without surface veneering and capable of being directly coated

The fireproof, waterproof and anti-deformation thin plate layer with excellent surface smoothness and fine surface interface characteristics is used for replacing two outermost layers of wood of a traditional multilayer plywood base material layer, and on one hand, the material interface characteristics that the material surface of the inorganic wood composite material is homogeneous, compact, low in porosity, fine and smooth in surface, free of color difference and the like, and can be directly coated and is free of veneering wood skin are utilized; on the other hand, through the optimized design of the material formula of the fireproof, waterproof and deformation-resistant thin plate layer, the proportion of wood particles of wood fibers is controlled within the range of 4% -10% of the excellent coating interface characteristic, and the application of a proper modifier ensures that the material layer can obtain good direct coating performance through the transition bridging of penetrating primer, so that the traditional procedure of veneering of a wood skin layer is omitted.

4. Design principle of digital colored drawing UV coating decorative composite coating, and function and effect thereof

On one hand, the decorative effect and the protective effect of the appearance color value of the product can be given, and the decoration and the protection are ensured. On the other hand, the intelligent coating process attribute which can be rapidly designed, produced and delivered and endows the product with the surface decorative effect realizes what you see is what you get, realizes the integrated production of the printing and coating decoration integrated process of digital colored drawing spray printing and UV coating, and can imitate or innovatively design and produce various decorative patterns and effects. Meanwhile, according to the quality performance or functional requirements, the expected performance, function or effect can be given to the product decorative surface.

In addition, the digital colored drawing UV coating composite decorative coatings arranged on the surfaces of the two sides of the product are actually a UV resin high-molecular material thin layer, and the UV resin can form a compact coating layer after being cured, so that the product has good hydrophobicity, the surface of the product has good waterproof and moistureproof performances, and the product can bear repeated scrubbing of wet cleaning cloth in daily maintenance and daily change and switching of air humidity in a use environment.

The invention has the beneficial effects that:

1. compared with a digital color painting UV coating furniture board taking the traditional multilayer plywood as a base material, the invention solves the deformation resistance problem, endows the product with excellent deformation resistance, and does not need deformation resistance treatment such as deformation resistance strips and the like when a subsequent user is used for manufacturing a furniture cabinet door; the problem that the waterproof and moistureproof performance and the fireproof and flame retardant performance are difficult to be considered is solved; the fire-retardant coating has the advantages that a chemical flame retardant is not needed, good fire-retardant performance can be obtained, the product is healthier, safer and more environment-friendly, and the use of a water-soluble flame retardant is avoided, so that the water resistance of the product is improved, and the problem of corrosivity of the flame retardant to furniture metal connecting pieces is solved.

2. The invention simplifies the preparation process of the base material in the production of products, omits the veneering procedure of the priming wood skin layer and the standardized wood skin layer, and reduces the original process of molding at least 4 times into the process of molding only two times; the method reduces a plurality of intermediate working procedures of board surface repairing, putty repairing, fixed thickness sanding, health preserving, assembly, cold pressing, hot pressing, veneering and the like, and achieves the economic effects of saving labor and time, saving energy, reducing consumption, improving efficiency and reducing cost.

3. The invention realizes the integrated production of product fire resistance, water resistance, moisture resistance and deformation resistance and the integrated production of printing, painting and decoration of digital colored drawing and UV coating.

Drawings

FIG. 1 is a schematic structural diagram of a material of a fireproof, waterproof and deformation-resistant digital painted UV-coated furniture board according to the present invention; the labels in fig. 1 can be described as follows:

1 is a three-sandwich plate blank formed by gluing a thick-core long middle plate and two layers of short middle plates;

2 is a five-sandwich plate blank formed by gluing a layer of three-sandwich plate blank and two layers of fireproof, waterproof and deformation-resistant thin plates;

3 is the furniture board coated with the fireproof, waterproof and deformation-resistant digital colored drawing UV;

101 is a thick core long middle plate layer;

102 is a thin core short middle ply;

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

301 is a digital painted UV coated decorative coating.

Fig. 2 is a flow chart of a preparation process of the fireproof, waterproof and deformation-resistant digital painted UV-coated furniture board.

Detailed Description

The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.

Embodiment 1 a fireproof, waterproof and deformation-resistant digital painted UV-coated furniture board

A 17 mm-thick fireproof, waterproof and deformation-resistant digital color painting UV coating furniture board 3; the material layer structure, as shown in figure 1 in the specification, comprises the following components in the order of symmetrical arrangement and distribution from the central layer to the outer side: the core-thickness middle plate layer 101 is positioned in the center layer, the core-thickness short middle plate layers 102 glued on the two side surfaces of the core-thickness middle plate layer 101 are symmetrically overlapped, the fireproof, waterproof and deformation-resistant thin plate layers 201 glued on the two outer side surfaces of the core-thickness short middle plate layer 101 are symmetrically overlapped, and the digital colored drawing UV coating composite decorative coatings 301 coated on the two side outer surfaces of the fireproof, waterproof and deformation-resistant thin plate layers 201 are symmetrically overlapped; the thickness of the integral product formed by overlapping and gluing the material layers is about 17mm +/-0.5 mm, and the integral product is a common thickness specification of a cabinet body plate or a cabinet door plate in the plate-type furniture.

The thick-core long middle plate layer 101 positioned in the central layer has the following main technical characteristics;

(1) the thickness is 7mm, and the thickness deviation is preferably controlled to be +/-0.2 mm; the method specifically comprises the steps of selecting a whole long pine middle plate which is cut in a rotary manner; when the material layer is used, double surfaces of the material layer are sanded with fixed thickness and fixed thickness, and the granularity specification of the abrasive belt is 60 meshes so as to ensure that the thickness deviation is within +/-0.2 mm;

(2) controlling the water content 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 the market standard;

(4) when assembling or splicing the whole wood, the material layers are placed in a mode that the grain direction of the wood is parallel to or consistent with the length direction of the product;

the thin core short and middle plate layer 102 symmetrically overlaid and glued on the two outer side surfaces of the thick core long and middle plate layer 101 has the following main technical characteristics:

(1) the thickness is 2.6mm, and the thickness deviation is controlled to be +/-0.1 mm; specifically, fast-growing eucalyptus trees which are artificially planted are selected;

(2) controlling the water content at 8-14%;

(4) when assembling or splicing the whole wood, the material layers are placed in a mode that the grain direction of the wood is parallel to or consistent with the width direction of the product;

the fireproof, waterproof and deformation-resistant veneer layer 201 symmetrically laminated on the two outer side surfaces of the veneer short and middle veneer layer 102 has the following main technical characteristics:

(1) the thickness is 3.2mm, and the thickness deviation is controlled to be +/-0.2 mm; the material is a mixed gelling flat plate material (also called as magnesium oxysulfate wood composite flat plate for short) of magnesium sulfate, magnesium oxide and wood fiber, wherein the wood fiber accounts for 4-10%; the air-dry density is controlled to be 1.0-1.5g/cm ³ (ii) a The grade of combustion performance of the fuel is not lower than A2 grade;

(2) controlling the water content at 6-12%; the water absorption rate is less than or equal to 15 percent; the dry shrinkage and wet expansion rate is less than or equal to 0.2 percent;

(4) before production and use, the material layer needs to be subjected to double-sided fixed-thickness sanding treatment by adopting a 120-150-mesh abrasive belt to obtain a fine surface effect which can be directly coated and glued and does not need secondary flatness processing;

the digital colored drawing UV coating composite decorative coating 301 symmetrically overlaid and coated on the outer surfaces of the two sides of the fireproof, waterproof and deformation-resistant thin plate layer 201 has the following main technical characteristics:

(1) the 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 thickness of the whole coating is 0.2 mm;

(2) the bottom-coating UV composite coating at least comprises 1 layer of roller-coating UV transparent high-permeability primer coating, 1 layer of roller-coating UV transparent high-adhesion primer and composite coating of roller-coating UV transparent high-adhesion putty, 2 layers of composite coating of roller-coating UV transparent common putty and roller-coating UV transparent sanding primer, and 3 layers of roller-coating UV white covering primer coating;

(3) the digital colored drawing UV composite coating at least comprises 1 layer of roller coating UV transparent ink high-adhesion primer coating and 1 layer of spray printing UV digital colored drawing image ink coating;

(4) the intermediate coating UV composite coating at least comprises 1 layer of roller coating UV transparent hardening primer coating and 1 layer of roller coating UV transparent sanding primer coating;

(5) the surface-coated UV composite coating at least comprises 1 layer of roller-coated UV transparent finish before spraying and 1 layer of spraying coated UV transparent finish.

The adhesives used for gluing the thick-core long middle plate layer 101, the thin-core short middle plate layer 102 and the fireproof and waterproof thin plate layer 201 are all acrylic acid modified polyvinyl acetate ester wood inorganic dual-purpose aldehyde-free added waterproof adhesives of three-tree paint company Limited; the dipping stripping performance or waterproof performance of the glue layer is not lower than the performance requirement of the III-class plate, and the glue layer is applicable to both wood and inorganic materials;

a preparation process of a fireproof, waterproof and deformation-resistant digital color painting UV coated furniture board comprises the following main steps: s1: preparing a fireproof, waterproof and deformation-resistant base material; s2: coating the digital colored drawing UV coating composite decorative coating; s3: and coating the scratch-proof surface protective film. The method specifically comprises the following subdivision steps:

s1: the preparation of the fireproof, waterproof and deformation-resistant substrate comprises the following 12 steps:

s101: the thick core long middle plate 101 is coated with waterproof aldehyde-free adhesive on both sides, and the amount of the coated adhesive on both sides is controlled to be 400- ² ；

S102: two layers of thin core short middle plates 102 (without glue coating) and one layer of thick core long middle plate 101 (with double-sided glue coating) are assembled into a three-sandwich plate blank 1; the specific operation is as follows:

a layer of thin core short and middle plate 102 is arranged on a workbench provided with a reference edge device (one edge is aligned with one end of the other end of the other end of the other end of the other end of the other end; then, a thick core long middle plate 101 with double surfaces glued in advance is placed on a thin core short middle plate 102 under the bottom in a neat and edgewise manner; finally, a thin core short middle plate 102 is arranged on the thick core long middle plate layer 101 with double surfaces coated with glue in a flush manner; the three layers of materials are combined by the above operation steps to form the three-sandwich plate blank 1, and the thickness of the three-sandwich plate blank 1 is 12.2 mm.

S103: time-limited one-time quantitative material collection

Repeating the steps S101 and S102, and stacking and accumulating on a blank assembly workbench to finish the blank assembly production operation of a plurality of groups of semi-finished products of the three-clamp plate blank 1; when the stacking height of the three-splint blank assembly blank stack reaches 1.5m-1.6m (about 120 groups), the blank assembly production operation can be stopped, and the blank assembly blank stack is transferred to the subsequent cold pressing procedure; the operation of the working procedure needs to be completed within 2h (namely, the quantitative material receiving time is controlled within 120 min);

s104: time-limited one-time cold pressing and repairing

Placing the assembled blank pile finished in the step S103 into cold press equipment specially matched with the plate, and performing cold pressing gluing and primary forming operation; the unit pressure of cold pressing is controlled to be 0.6-0.8 MPa; cold pressing time is controlled to be 0.5-1 h; after cold pressing, the flatness repairing of the plate surface needs to be completed within 2 hours;

s105: time-limited one-step hot-pressing and glue-synthesizing molding

After the step S104 is finished, the hot-press gluing and forming operation of the three-sandwich plate blank 1 is finished within 2 h; the unit pressure of hot pressing is controlled to be 0.7-0.9 MPa; the unit time of hot pressing is controlled to be 1.5 min/mm; the hot pressing process curve is not lower than 3 sections, wherein the time of the quick closing section is less than 60s, and the time of the pressure release and moisture discharge section is controlled to be 0.5 min/mm; the hot pressing temperature is controlled at 120-125 ℃; after hot pressing, the compression rate of the plate is within 4 percent, and the actual thickness of the plate is controlled to be not less than 11.7 mm;

s106: timing one-time health preserving, greasing and nourishing, thickness-fixing sanding

After S105 is finished, quantitatively stacking, pressing the top of the material pile by using a weight not less than 2t, naturally curing the plate for 3-5d in a load-bearing and flatness state, releasing stress, and cooling to a state (temperature and humidity) balanced with the environment to avoid warping deformation; then, using special repairing putty to repair the flatness of the board surface; after the repairing 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 bright; controlling the amount of the double-sided sanding to be within 0.4mm, and controlling the actual thickness of the plate to be more than 11.3mm after the double-sided thickness is determined;

s107: coating glue on two sides of the three-sandwich plate blank 1; and single-sided adhesive coating of fireproof, waterproof and deformation-resistant thin plate 201

After the step S106 is finished, the double-sided gluing can be carried out on the three-sandwich plate blank 1, and the quantity of the double-sided gluing is controlled to be 400-450g/m ² (ii) a And performing single-sided gluing on the fireproof, waterproof and deformation-resistant thin plate 201, wherein the single-sided gluing amount is controlled to be 200-fold 220g/m ² ；

S108: a layer of three-sandwich plate blank 1 (double-sided gluing) and two layers of fireproof, waterproof and deformation-resistant thin plates 201 (single-sided gluing) are assembled into a five-sandwich plate blank 2; the thickness of the assembly is 17.7 mm;

after the step S107 is finished, a layer of three-sandwich plate blank 1 (double-sided gluing) and two layers of fireproof, waterproof and deformation-resistant thin plates 201 (single-sided gluing) are assembled on an assembly workbench, and the five-sandwich plate blank 2 is assembled on the gluing side;

when assembling, firstly, a layer of fireproof, waterproof and deformation-resistant sheet 201 (single-sided gluing) is arranged on a workbench in a neat and edgewise manner, and the sheet is arranged in a way that the surface without gluing faces downwards and the surface with gluing faces upwards; then, a layer of three-sandwich plate blank 1 is superposed and placed on the upper surface (double-sided gluing); finally, a layer of fireproof, waterproof and deformation-resistant thin plate 201 with the glue-coated surface facing downwards and the non-glue-coated surface facing upwards is superposed on the three-sandwich plate blank 1 (double-sided glue coating); the assembly production of a group of five-sandwich plate blanks 2 can be finished according to the steps;

s109: time-limited secondary quantitative material collection

Continuously repeating the operation of the step S108, and finishing the production of a plurality of groups of five-clamping plate blanks on the assembly workbench; when the stacking height of the five-splint blank assembly blank stack reaches 1.5m-1.6m (about 90 groups), the blank assembly production operation can be stopped, and the blank assembly blank stack is transferred to the subsequent cold pressing procedure; the operation of the procedure needs to be completed within 2h (namely, the quantitative material receiving time is controlled within 120 min).

S110: time-limited secondary cold pressing and repairing

Placing the assembled blank pile finished in the step S109 into cold press equipment specially matched with the plate, and performing cold pressing gluing and primary forming operation; the unit pressure of cold pressing is controlled to be 0.6-0.8MPa, and the cold pressing time is controlled to be 0.5-1 h; after cold pressing, the flatness repairing of the plate surface is not needed;

s111: time-limited secondary hot-pressing and glue-synthesizing molding

After the step S110 is finished, the operations of hot-press gluing and forming of the five-plywood blank are finished within 2 h; the unit pressure of hot pressing is controlled to be 0.7-0.9MPa, the unit time of hot pressing is controlled to be 1.5min/mm, the hot pressing process curve is not lower than 3 sections, the time of a quick closing section is controlled to be less than 60s, the time of a pressure releasing and moisture exhausting section is controlled to be 0.5min/mm, and the hot pressing temperature is controlled to be 115-120 ℃; after hot pressing is finished, the compression rate of the plate is within 2 percent, and the actual thickness is more than 17.3 mm.

S112: time-limited secondary health preserving, putty supplementing, fixed thickness sanding and edge sawing

After S111 is finished, quantitatively stacking, pressing the top of the stock pile by using a weight more than 2t, naturally curing the plate for 3-5d in a load-bearing and flatness state, releasing stress, and cooling to a state (temperature and humidity) balanced with the environment to avoid the problem of warping deformation; then, special repairing putty for the roller-coated furniture board is used for repairing the flatness of the board surface of the five-sandwich board blank (2), after the putty is cured, the fixed-thickness sanding process is carried out, and sanding with the double-sided fixed-thickness is carried out on the board surface by using abrasive belts with the granularity specification of 150 meshes and 240 meshes, so as to ensure that the board surface is smooth and clean; the sanding amount of the double-side fixed-thickness sanding is 0.3mm, and the actual thickness of the plate after double-side sanding is 17.0 +/-0.1 mm;

after the steps of the working procedures are finished, the plate can be sawn and processed according to the requirement, and redundant partial materials at the edge part are cut and removed, so that sundries such as plate surface garbage and the like can not be generated when the plate enters the subsequent coating working procedure; the sawing process requirements can be executed according to the conventional technical scheme; the edge sawing process is preferably performed by using a special saw blade for cutting inorganic plates.

S2: coating the digital colored drawing UV coating composite decorative coating 301: sanding the five-layer plywood blank obtained in the step S112 by using an abrasive belt with the granularity specification of 240-one 320 meshes, sequentially coating a primary coating UV composite coating, a digital colored drawing UV composite coating, a middle coating UV composite coating and a top coating UV composite coating on the two side board surfaces of the five-layer plywood blank according to the composition and distribution sequence of each coating, controlling the coating thickness of each board surface to be 0.2mm, and controlling the thickness of the board after the double-side coating to be 17.4 +/-0.1 mm, wherein the roller coating UV transparent high-permeability primer coating in the primary coating UV composite coating is the first coating of the whole composite coating, and the total coating amount of the roller coating 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: coating of the surface scratch-proof PE protective film: coating the decorative surface 301 coated with the digital colored drawing UV with a scratch-proof PE protective film on the surface, wherein the coating mode is that the surface is coated by rolling on a production line, and the pressure of a contact roller only needs to keep a proper amount of slight pressure, so that a surface paint film is prevented from being crushed or damaged; the thickness of the surface scratch-proof PE protective film is 0.04-0.06mm, the inner surface of the surface scratch-proof PE protective film is provided with glue, and the surface scratch-proof PE protective film is a transparent PE surface protective film which is easy to coat, adhere, tear or clear; and when the PE protective film is unfolded and coated, the needle roller is contacted with the PE protective film, and a plurality of air holes with the aperture of 0.5-1mm are pierced on the plane of the surface protective film, so that the odor of the light ink or paint remained on the digital colored drawing UV coating composite decorative coating of the product after coating can still be emitted and volatilized out from the air holes on the surface protective film on the plate surface, the odor grade of the product can be cooled in a short time after the product is produced, and can reach the net odor grade (the odor grade is less than or equal to 2 grade), and the detection index of the volatile organic compound can reach the stable balance state of the lowest level in a short time after delivery; the PE protective film with the coated surface scratch-proof needs to be torn off or removed in the final link of product use or installation.

The fireproof, waterproof and deformation-resistant digital painted UV coated furniture board prepared in the embodiment 1 and having the thickness of 17mm has the fire resistance limit of more than or equal to 1.0h and the combustion performance grade of B1-C grade; the dipping and peeling performance of the composite board can pass the test of a III-class board, the 24-hour water absorption thickness expansion rate is less than or equal to 4 percent, the 24-hour water absorption rate is less than or equal to 30 percent, and the waterproof test result meets the national standard regulation; the warpage deformation degree of the plate surface is less than or equal to 0.1 percent, and the arch height of the maximum deformation part of the plate surface is less than or equal to 2 mm; the rate of mass production excellent quality is more than 98%, and other quality performances of the product can meet the performance requirements of furniture plates, wall plates, door plates and other household plates, and the product has higher quality level and excellent fireproof, waterproof and deformation-resistant performances.

While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments, which are fully applicable in all kinds of fields of application of the invention, and further modifications may readily be effected by those skilled in the art, so that the invention is not limited to the specific details without departing from the general concept defined by the claims and the scope of equivalents.

Claims

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 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;

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).