Integrated rock board furniture board and preparation method thereof and edge sealing adhesive for furniture board

Abstract

The present invention discloses an integrated rock slab furniture board and a preparation method thereof and an edge-sealing adhesive for the furniture board. The integrated rock slab furniture board comprises a thin rock slab surface layer, an adhesive layer, an oriented strand board bottom layer and a bottom sealing film layer arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge-sealing strip by an adhesive special for edge-sealing. The furniture board has a uniform structure, good toughness, and strong tensile resistance in the transverse and longitudinal directions, so that the board has the characteristics of high strength, stable performance, green environmental protection, and is not easy to bend and deform during processing and use, thereby ensuring the flatness and excellent use quality of the board. The main components of the edge-sealing adhesive for furniture boards are polyether sulfonate aqueous polyurethane dispersion, modified aluminum phosphate adhesive, acrylic emulsion and filler, which has good water resistance, weather resistance and corrosion resistance. It has excellent compatibility and bonding strength with rock slabs, wood and PVC substrates, and can be used for furniture edge sealing to improve the sealing of the board.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated rock slab furniture boards, and in particular to an integrated rock slab furniture board and a preparation method thereof, and an edge sealing adhesive for the furniture board. Background Art

[0002] Large wooden furniture boards are prone to bending and deformation during use, and the use of straighteners can only slightly adjust the deformation in a directional manner; for composite furniture boards with aluminum honeycombs as the base, it is necessary to pre-open holes in the honeycomb core to pre-install hardware installation connection accessories, which increases the number of installation processes and requires high positioning. During the edge sealing process of composite rock slabs, the edges of the rock slabs are prone to collapse, resulting in glue overflow and glue lines, and problems such as loose bonding, bulging and degumming during processing and use.

[0003] As a new type of material that breaks through the traditional concept of ceramics, compared with other traditional materials, rock slabs have the following performance advantages: (1) Environmental protection and health: rock slabs are made of pure natural materials, and the production process does not release any toxic or polluting substances. They can be recycled and fully follow the green environmental protection concept of sustainable development; (2) Fireproof and high temperature resistant: rock slabs are resistant to high temperatures and will not smoke, discolor, shrink or crack under high temperature firing. Their combustion performance level is Class A and they will not deform when in direct contact with high temperature objects; (3) Antibacterial and easy to clean: the extremely high density of rock slabs makes it impossible for stains to penetrate. Daily cleaning can be done by wiping them clean with a wet towel, which is simple, fast and will not breed bacteria; (4) Ultra-high hardness and scratch resistance: rock slabs have extremely high hardness, with a Mohs hardness of 6, and are not easy to deform or scratch; (5) Corrosion resistance: rock slabs are resistant to most chemical solutions, disinfectants and other chemical substances; (6) Flexible customization and all-round application: rock slabs can be cut, drilled, polished and other deep-processed like stone. However, the large size and thin thickness of thin rock slabs have great limitations from the processing and production of raw materials to transportation, installation and use, which means that thin rock slabs have not yet been widely popularized and applied.

[0004] Moreover, if the amount of glue applied is not well controlled during the edge banding process of the integrated stone slab furniture board, less glue will affect the uniformity of the bonding strength and glue layer, and more glue will cause glue overflow and leave obvious glue lines; if the pressure of the roller is not adjusted properly and the pressure is perpendicular to the plane of the edge banding strip to ensure that the hot melt adhesive can be evenly distributed between the side of the board and the edge banding strip, the glue line may be uneven and discontinuous; if the flatness of the composite board is not high, the edge of the stone slab will collapse during the trimming and polishing of the edge banding strip, affecting the appearance quality; if the side of the composite board is not flat enough, and the side is not perpendicular to the panel plane, the edge banding strip may not be firmly bonded and uneven glue lines may occur, affecting the use and appearance. In addition, the current furniture board is prone to swelling, especially if EVA hot melt adhesive is used for edge banding, which will have a great impact on the bonding strength and sealing in a continuous high temperature environment. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide an integrated rock slab furniture board, which uses an oriented strand board as a base plate and is provided with an adhesive layer, has a uniform structure, good toughness, and strong tensile resistance in the horizontal and vertical directions, so that the board has the characteristics of high strength, stable performance, green and environmental protection, and is not easy to bend and deform during processing and use, thereby ensuring the flatness and excellent use quality of the board. At the same time, the board also has the functions of sound absorption and noise reduction; the second purpose of the present invention is to provide a method for preparing an integrated rock slab furniture board, which has simple steps and is suitable for large-scale industrial production; the third purpose of the present invention is to provide an edge-sealing adhesive for furniture boards, which uses less toxic solvents, has good bonding strength, good sealing and is not easy to swell.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] An integrated rock slab furniture board comprises a thin rock slab surface layer, an adhesive layer, an oriented strand board bottom layer (OSB board) and a bottom sealing film layer which are arranged in sequence from top to bottom; wherein edge banding strips are adhered to the sides of the furniture board by using a special edge banding adhesive.

[0008] Furthermore, the thickness of the thin rock board surface layer is 3 to 6 mm; the edge banding strip is a concave structure, and the concave portion is used for coating the special edge banding adhesive.

[0009] Furthermore, the bottom layer of the oriented structural strand board is an oriented structural board made of small-diameter wood, thinning wood and wood core as raw materials, processed into flakes, and then deoiled, dried, glued, oriented paved, and hot-pressed; the total thickness of the bottom layer of the oriented structural strand board is 9 to 40 mm, preferably 9 to 18 mm. The size of the flakes is 40-100 mm long, 5-20 mm wide, and 0.3-0.7 mm thick.

[0010] Specifically, diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinned wood and the wood core. Diphenylmethane diisocyanate (MDI) ensures the green and environmental protection of the board, and the formaldehyde emission is almost zero, which eliminates the pollution source from the root. At the same time, since MDI glue is insoluble in water, the board has good waterproof, moisture-proof and mildew-proof properties. MDI reacts chemically with wood molecules to generate strong and irreversible new chemical bonds, producing strong and tough nail holding force and deformation resistance, high strength, good uniformity, and small linear expansion coefficient. The stability of the board is structurally guaranteed, and it is convenient to carry out sawing, planing, drilling, nailing, sanding and other processing. At the same time, the board also has the functions of sound absorption and noise reduction.

[0011] Furthermore, the bottom sealing film layer is one of UV film, PET film, PVC film or melamine film, preferably PET film, with a thickness of 0.25-0.5 mm; PET film has the characteristics of high mechanical strength, good electrical insulation, no fading, no color difference, high temperature resistance, aging resistance, oil resistance, acid and alkali resistance, anti-slip and wear resistance, etc. It is non-toxic and tasteless, green and environmentally friendly, easy to clean, and can greatly increase the anti-fouling and wear resistance of the board, and is beautiful. The material of the edge banding is PVC or ABS.

[0012] Further, the adhesive in the bonding layer is one of moisture-curing reactive polyurethane hot melt adhesive, closed polyurethane hot melt adhesive, hot melt polyurethane hot melt adhesive or ethylene-vinyl acetate copolymer. Preferably, moisture-curing reactive polyurethane hot melt adhesive is selected. Moisture-curing reactive polyurethane hot melt adhesive has the following properties: the main component of moisture-curing reactive polyurethane hot melt adhesive is terminal isocyanate polyurethane prepolymer, and moisture-curing polyurethane hot melt adhesive is based on terminal -NCO prepolymer, and is equipped with thermoplastic resin, tackifying resin, antioxidant, catalyst, filler and other additives that do not react with isocyanate group. The adhesive is heated and melted into a fluid, applied on the surface of the bonded substrate, and two adherends are attached. After cooling, bonding is formed, and then the moisture in the air or the trace moisture in the bonded substrate and other active hydrogen-containing compounds react with -NCO groups and extend the chain to generate a cross-linked network structure and a polymer with high cohesion, so that the bonding force is further enhanced. The -NCO group in isocyanate reacts easily with compounds containing active hydrogen.

[0013] The second object of the present invention is achieved by adopting the following technical solution:

[0014] The preparation method of the above-mentioned integrated stone slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut the integrated stone slab at one time, then coating the side of the integrated stone slab with a special edge banding adhesive, and then sticking the edge banding strip on it, and then completing the edge banding after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated stone slab furniture board.

[0015] The third object of the present invention is achieved by adopting the following technical solution:

[0016] An edge-sealing adhesive for furniture panels, used as the above-mentioned integrated stone board furniture panel edge-sealing adhesive, comprising the following raw materials by mass: 20-30 parts of polyether sulfonate waterborne polyurethane dispersion, 10-15 parts of modified aluminum phosphorus adhesive, 20-30 parts of acrylic emulsion, 5-10 parts of filler, 2-5 parts of thickener and 1-3 parts of defoamer; wherein the dispersion of polyether sulfonate waterborne polyurethane is obtained by dispersing polyether sulfonate waterborne polyurethane microspheres in acetone and water, and then removing acetone, and the pH of the edge-sealing adhesive is 7-8. The filler is heavy calcium carbonate, light calcium carbonate, nano calcium carbonate and nano silicon dioxide, etc.

[0017] Furthermore, the preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0018] 1) first adding a boric acid solution to alumina powder, stirring, and performing an exothermic reaction to obtain a mixture;

[0019] 2) Heat and stir the mixture until the liquid becomes transparent and viscous, cool it down, and add water to adjust the density;

[0020] 3) Add boric acid powder, stir until completely dissolved, and then add water to adjust the density to obtain a modified aluminum phosphate adhesive.

[0021] Furthermore, the preparation method of the polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 50-60°C, then reacted at 150-160°C for 4-5h, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is (1-2): (1.1-1.5): (0.5-0.8): (1-2). wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 5-8% of the total volume of the above four monomers.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The integrated rock board furniture board of the present invention includes a thin rock board surface layer, an adhesive layer, an oriented structural strand board bottom layer and a bottom sealing film layer arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip by means of a special edge banding adhesive. The present invention adopts an oriented structural strand board (OSB) as the bottom plate. Based on the characteristics of the oriented structure, it abandons the use of a larger LSB and instead uses a smaller OSB for the surface layer, so that the surface flatness of the board is higher, and multi-layer oriented paving and high-temperature hot pressing eliminate the internal stress of the board. Moreover, since the material of the bottom layer of the oriented structural strand board is uniform, high in strength, and has a strong nail holding force, it is convenient and efficient to install hardware accessories during furniture assembly. Covering the bottom sealing film layer on the back of the bottom layer of the oriented structural strand board, on the one hand, ensures the beauty of the back of the board, and on the other hand, more importantly, prevents the board from absorbing water vapor in the air, ensures a stable moisture content of the board, and prevents the board from absorbing water and deforming; at the same time, it can also prevent the release of residual harmful compounds in the board. The bonding layer structure of the integrated rock board furniture board is uniform, with good toughness and strong tensile resistance in the horizontal and vertical directions, which makes the board have high strength, stable performance, green and environmental protection, and is not easy to bend and deform during processing and use, ensuring the flatness and excellent use quality of the board. At the same time, the board also has the functions of sound absorption and noise reduction.

[0024] (2) The thin rock board of the present invention and the oriented strand board are compounded with a moisture-curing reactive polyurethane hot melt adhesive (adhesive layer). The adhesive has excellent bonding strength, high and low temperature resistance, chemical corrosion resistance, aging resistance and environmental protection performance (the content of heavy metals and benzene chemicals is far lower than international specifications and standards), and its toughness (elasticity) can be adjusted by adjusting the ingredient ratio. By adjusting the toughness (elasticity) of the hot melt adhesive by the ingredient ratio, the adsorption force and bonding strength on the surface of the wooden board can be improved, and at the same time, the coordination of the deformation of the board under the action of external force and temperature difference can be improved, and the generation of stress within the board can be reduced, thereby better ensuring the flatness of the integrated rock board furniture board and a more beautiful use effect.

[0025] (3) The edge banding strips are concave PVC edge banding strips. This structure can increase the contact area with the edge banding adhesive used for furniture boards, and prevent glue overflow and glue lines during the edge banding process, making the edge banding effect more perfect. Due to the presence of the edge banding strips, it can also prevent the board side from absorbing water and deforming, and at the same time prevent the release of harmful compounds remaining in the board.

[0026] (4) In the preparation method of the furniture board of the present invention, since the composite flatness of the board is high and it is composited on both sides, it can balance the tension on both sides of the board to a certain extent and has small deformation. Therefore, three saw blades are used to dry cut the integrated rock board at one time, avoiding the deformation of the board caused by the shrinkage and swelling of the wood board caused by wet cutting. The side edge of the cut integrated rock board is at right angles to the plane of the panel, avoiding the collapse of the rock board caused by the trimming and polishing of the edge banding strip, which affects the aesthetic effect. After assembling the layers to form a board, a special edge-sealing adhesive is applied to the side of the integrated rock board, and then the edge banding strip is attached thereto. After roller compaction, upper and lower trimming, trimming, eliminating glue lines and polishing, the edge sealing is completed to avoid the situation where the edge banding strip is not firmly bonded and the glue line is uneven, which affects the use and appearance effect, thereby obtaining a high-quality integrated rock board furniture board.

[0027] (5) The main components of the edge-sealing adhesive for furniture panels of the present invention are polyether sulfonate aqueous polyurethane dispersion, modified phosphate aluminum adhesive, acrylic emulsion and filler. The above raw materials have the advantages of being environmentally friendly and non-toxic. The modified phosphate aluminum adhesive is a mixture of acid phosphates, which has complex chemical reactivity and can be used as an adhesive by forming chemical bonds between molecules through dehydration polymerization. On the other hand, the polar end-hydroxyl group it contains makes it easy to form hydrogen bonds with hydroxyl groups on wood cellulose, hemicellulose and other components, that is, it can generate strong interfacial interaction forces with wood components, thereby showing bonding strength. The polyether sulfonate waterborne polyurethane dispersion has good elasticity, excellent mechanical strength, high adhesion and biological properties. It is a strong acid and strong base salt with a large degree of ionization, which promotes mutual repulsion between latex particles, effectively prevents collision between latex particles, forms a more stable double potential layer, and is easy to produce high solid content materials. Compared with carboxylic acid waterborne polyurethane, sulfonic acid waterborne polyurethane has a high solid content and excellent hydrolysis stability in a wide pH range; and it directly introduces ionic salts into the system, so the neutralization process does not require volatile amines, effectively protects the environment, avoids harm to human health, plays an important role in environmental protection, and improves the practical value and application range of the product. The sealant formed by the composite of the three raw materials does not use DOP, which will volatilize harmful substances, as a plasticizer, and has good water resistance, weather resistance and corrosion resistance. It has excellent compatibility and bonding strength with rock board, wood and PVC substrates, and can be used for furniture edge sealing, which can effectively prevent moisture from entering the interior of the board, improve the sealing of the board, and avoid problems such as loose bonding, bulging, degumming and swelling during processing and use.

[0028] (6) The modified aluminum-phosphide adhesive in the edge-sealing adhesive for the furniture board of the present invention is specifically a boric acid-modified aluminum-phosphide adhesive, with boric acid as a curing agent. Boric acid has good solubility relative to aluminum curing agents and can react with phosphoric acid to form boron phosphate. It can also react with aluminum hydroxide to form a hydroxy-boric acid complex. These two substances can make the acid phosphate solution more stable. On the other hand, the boron filling of aluminum vacancies is, in principle, conducive to the formation of a spatial network structure that combines vertically and horizontally, significantly improving the cohesive strength of the adhesive layer. In addition, the BO bond length is much smaller than the Al-O bond length, which means that the boron skeleton structure is more compact than the aluminum skeleton structure, so it is more difficult for water molecules to enter and destroy the network structure, thereby improving the water resistance of the phosphate structure.

[0029] (7) The polyether sulfonate aqueous polyurethane dispersion in the edge-sealing adhesive for furniture panels of the present invention is obtained by dispersing polyether sulfonate aqueous polyurethane microspheres in acetone and water, wherein the polyether sulfonate aqueous polyurethane microspheres are prepared from 1,4-butylene glycol oxalate, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst, and the product after the reaction is completed is polyether sulfonate aqueous polyurethane microspheres stored in solid form, and acetone is added to dissolve the polyether sulfonate aqueous polyurethane microspheres when needed, and then water is added to disperse the solution to obtain a polyether sulfonate aqueous polyurethane dispersion. In the process of producing polyether sulfonate aqueous polyurethane microspheres, there is no need to add a large amount of organic solvent, and the polyether sulfonate aqueous polyurethane microspheres can be synthesized by adjusting the time and temperature, and the solid product is more convenient to handle and store. Moreover, the acetone added to make the dispersion can be reused because acetone is only used as a solvent and does not participate in chemical changes. The amount of organic solvent required for traditional polyether sulfonate waterborne polyurethane microspheres is too large. The present invention can effectively reduce the use of organic solvents, thereby reducing production costs and improving production efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of an integrated rock board furniture panel;

[0031] In the figure: 1. Thin rock board surface layer; 2. Adhesive layer; 3. Oriented strand board bottom layer; 4. Bottom sealing film layer; 5. Special adhesive for edge sealing; 6. Edge sealing strip. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] Example 1

[0034] like Figure 1As shown, an integrated rock board furniture board comprises a thin rock board surface layer 1, an adhesive layer 2, an oriented strand board bottom layer 3 (OSB board) and a bottom sealing film layer 4 arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip 6 by means of a special edge banding adhesive 5.

[0035] Among them, the thickness of the thin rock board surface layer 1 is 5mm; the edge banding strip 6 is a concave structure, and the concave part is used to apply the special edge banding adhesive 5. The bottom layer 3 of the oriented structural particle board is made of small-diameter wood, thinning wood and wood core as raw materials, processed into shavings, and is made into an oriented structural board after deoiling, drying, gluing, directional paving, and hot pressing processes; the total thickness of the bottom layer 3 of the oriented structural particle board is 15mm. Among them, the size of the shavings is 50mm long, 10mm wide, and 0.5mm thick. Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinning wood and the wood core. The bottom sealing film layer 4 is a PET film with a thickness of 0.3mm. The material of the edge banding strip 6 is PVC. The adhesive in the bonding layer 2 is a moisture-curing reactive polyurethane hot melt adhesive.

[0036] The preparation method of the above-mentioned integrated rock slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut at one time to obtain the integrated rock slab, then coating the side of the integrated rock slab with a special edge-sealing adhesive 5, and then attaching the edge-sealing strip 6 thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated rock slab furniture board.

[0037] Specifically, an edge-sealing adhesive for furniture panels comprises the following raw materials in parts by mass: 27 parts of polyether sulfonate waterborne polyurethane dispersion, 12 parts of modified phosphoaluminum adhesive, 25 parts of acrylate emulsion, 7 parts of filler, 3 parts of thickener and 2 parts of defoamer; wherein the polyether sulfonate waterborne polyurethane dispersion is prepared by first adding twice the volume of acetone to polyether sulfonate waterborne polyurethane microspheres, and then adding one volume of water to disperse the microspheres after the microspheres are completely dissolved, and then distilling off the acetone to obtain a polyether sulfonate waterborne polyurethane dispersion with a solid content of 48%. The pH of the edge-sealing adhesive 5 is 8. The filler is heavy calcium carbonate.

[0038] The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0039] 1) firstly adding a 55% boric acid solution to alumina powder, stirring at room temperature, and performing an exothermic reaction to obtain a mixture; wherein the molar ratio of boron in the boric acid to aluminum in the alumina is 2.6:1;

[0040] 2) Heat the mixture at 115°C and stir until the liquid becomes transparent and viscous, cool it to 85°C, and add water to adjust the density to 1.5g / cm3 , obtaining a phosphoaluminum adhesive;

[0041] 3) Add boric acid powder and stir until completely dissolved, then add water to adjust the density to 1.5g / cm 3 , a modified aluminum-phosphide adhesive with a solid content of 60% is obtained; wherein 2 g of boric acid powder is added to every 100 ml of the aluminum-phosphide adhesive.

[0042] The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 55°C, then reacted at 155°C for 4.5 hours, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is 1.5:1.2:0.7:1.1. wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 6% of the total volume of the above four monomers.

[0043] Example 2

[0044] like Figure 1 As shown, an integrated rock board furniture board comprises a thin rock board surface layer 1, an adhesive layer 2, an oriented strand board bottom layer 3 (OSB board) and a bottom sealing film layer 4 arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip 6 by means of a special edge banding adhesive 5.

[0045] The thickness of the thin rock board surface layer 1 is 3 mm; the edge banding strip 6 is a concave structure, and the concave part is used to apply the special edge banding adhesive 5. The bottom layer 3 of the oriented structural particle board is made of small-diameter wood, thinning wood and wood core as raw materials, processed into shavings, and is made into an oriented structural board after deoiling, drying, gluing, directional paving, and hot pressing processes; the total thickness of the bottom layer 3 of the oriented structural particle board is 9 mm. The size of the shavings is 40 mm long, 5 mm wide, and 0.3 mm thick. Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinning wood and the wood core. The bottom sealing film layer 4 is a UV film with a thickness of 0.25 mm. The material of the edge banding strip 6 is ABS. The adhesive in the bonding layer 2 is a closed polyurethane hot melt adhesive.

[0046] The preparation method of the above-mentioned integrated rock slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut at one time to obtain the integrated rock slab, then coating the side of the integrated rock slab with a special edge-sealing adhesive 5, and then attaching the edge-sealing strip 6 thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated rock slab furniture board.

[0047] Specifically, an edge-sealing adhesive for furniture panels comprises the following raw materials in parts by mass: 20 parts of polyether sulfonate waterborne polyurethane dispersion, 10 parts of modified aluminum phosphorus adhesive, 20 parts of acrylic emulsion, 5 parts of filler, 2 parts of thickener and 1 part of defoamer; wherein the polyether sulfonate waterborne polyurethane dispersion is prepared by first adding twice the volume of acetone to polyether sulfonate waterborne polyurethane microspheres, and then adding one volume of water to disperse the microspheres after the microspheres are completely dissolved, and then removing the acetone by distillation to obtain a polyether sulfonate waterborne polyurethane dispersion with a solid content of 45%. The pH of the edge-sealing adhesive 5 is 7. The filler is nano calcium carbonate.

[0048] The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0049] 1) firstly adding a 50% boric acid solution to alumina powder, stirring at room temperature, and performing an exothermic reaction to obtain a mixture; wherein the molar ratio of boron in the boric acid to aluminum in the alumina is 2.5:1;

[0050] 2) Heat the mixture at 110°C and stir until the liquid becomes transparent and viscous, cool it to 80°C, and add water to adjust the density to 1.5g / cm 3 , obtaining a phosphorus-aluminum adhesive;

[0051] 3) Add boric acid powder and stir until completely dissolved, then add water to adjust the density to 1.5g / cm 3 , a modified aluminum-phosphorus adhesive with a solid content of 60% is obtained; wherein 6g of boric acid powder is added to every 100ml of the aluminum-phosphorus adhesive.

[0052] The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 50°C, then reacted at 150°C for 4 hours, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is 1:1.1:0.5:1. wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 5% of the total volume of the above four monomers.

[0053] Example 3

[0054] like Figure 1 As shown, an integrated rock board furniture board comprises a thin rock board surface layer 1, an adhesive layer 2, an oriented strand board bottom layer 3 (OSB board) and a bottom sealing film layer 4 arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip 6 by means of a special edge banding adhesive 5.

[0055] The thickness of the thin rock board surface layer 1 is 6 mm; the edge banding strip 6 is a concave structure, and the concave part is used to apply the special edge banding adhesive 5. The bottom layer 3 of the oriented structural particle board is an oriented structural board made of small-diameter wood, thinning wood and wood core as raw materials, processed into shavings, and deoiled, dried, glued, oriented paved, and hot-pressed; the total thickness of the bottom layer 3 of the oriented structural particle board is 40 mm. The size of the shavings is 100 mm long, 20 mm wide, and 0.7 mm thick. Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinning wood and the wood core. The bottom sealing film layer 4 is a PVC film with a thickness of 0.5 mm. The material of the edge banding strip 6 is PVC. The adhesive in the bonding layer 2 is a hot-melt polyurethane hot melt adhesive.

[0056] The preparation method of the above-mentioned integrated rock slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut at one time to obtain the integrated rock slab, then coating the side of the integrated rock slab with a special edge-sealing adhesive 5, and then attaching the edge-sealing strip 6 thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated rock slab furniture board.

[0057] Specifically, an edge-sealing adhesive for furniture panels comprises the following raw materials in parts by mass: 30 parts of polyether sulfonate waterborne polyurethane dispersion, 15 parts of modified aluminum phosphorus adhesive, 30 parts of acrylic emulsion, 10 parts of filler, 5 parts of thickener and 3 parts of defoamer; wherein the polyether sulfonate waterborne polyurethane dispersion is prepared by first adding twice the volume of acetone to polyether sulfonate waterborne polyurethane microspheres, and then adding one volume of water to disperse the microspheres after the microspheres are completely dissolved, and then distilling off the acetone to obtain a polyether sulfonate waterborne polyurethane dispersion with a solid content of 50%. The pH of the edge-sealing adhesive 5 is 8. The filler is nano-silicon dioxide.

[0058] The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0059] 1) firstly adding a 60% boric acid solution to alumina powder, stirring at room temperature, and performing an exothermic reaction to obtain a mixture; wherein the molar ratio of boron in the boric acid to aluminum in the alumina is 2.7:1;

[0060] 2) Heat the mixture at 120°C and stir until the liquid becomes transparent and viscous, cool it to 90°C, and add water to adjust the density to 1.6 g / cm 3 , obtaining a phosphoaluminum adhesive;

[0061] 3) Add boric acid powder and stir until completely dissolved, then add water to adjust the density to 1.6 g / cm 3, a modified aluminum-phosphide adhesive with a solid content of 62% is obtained; wherein 4 g of boric acid powder is added to every 100 ml of the aluminum-phosphide adhesive.

[0062] The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 60°C, then reacted at 160°C for 5 hours, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is 2:1.5:0.8:2. wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 8% of the total volume of the above four monomers.

[0063] Example 4

[0064] like Figure 1 As shown, an integrated rock board furniture board comprises a thin rock board surface layer 1, an adhesive layer 2, an oriented strand board bottom layer 3 (OSB board) and a bottom sealing film layer 4 arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip 6 by means of a special edge banding adhesive 5.

[0065] The thickness of the thin rock board surface layer 1 is 4 mm; the edge banding strip 6 is a concave structure, and the concave part is used to apply the special edge banding adhesive 5. The bottom layer 3 of the oriented structural particle board is made of small-diameter wood, thinning wood and wood core as raw materials, processed into shavings, and is made into an oriented structural board after deoiling, drying, gluing, directional paving, and hot pressing processes; the total thickness of the bottom layer 3 of the oriented structural particle board is 18 mm. The size of the shavings is 60 mm long, 15 mm wide, and 0.6 mm thick. Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinning wood and the wood core. The bottom sealing film layer 4 is a melamine film with a thickness of 0.4 mm. The material of the edge banding strip 6 is ABS. The adhesive in the bonding layer 2 is ethylene-vinyl acetate copolymer.

[0066] The preparation method of the above-mentioned integrated rock slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut at one time to obtain the integrated rock slab, then coating the side of the integrated rock slab with a special edge-sealing adhesive 5, and then attaching the edge-sealing strip 6 thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated rock slab furniture board.

[0067] Specifically, an edge-sealing adhesive for furniture panels comprises the following raw materials in parts by mass: 25 parts of polyether sulfonate waterborne polyurethane dispersion, 11 parts of modified aluminum phosphorus adhesive, 23 parts of acrylic emulsion, 6 parts of filler, 2 parts of thickener and 2 parts of defoamer; wherein the polyether sulfonate waterborne polyurethane dispersion is prepared by first adding twice the volume of acetone to polyether sulfonate waterborne polyurethane microspheres, and then adding one volume of water to disperse the microspheres after the microspheres are completely dissolved, and then distilling off the acetone to obtain a polyether sulfonate waterborne polyurethane dispersion with a solid content of 46%. The pH of the edge-sealing adhesive 5 is 7. The filler is nano-silicon dioxide.

[0068] The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0069] 1) firstly adding a 60% boric acid solution to alumina powder, stirring at room temperature, and performing an exothermic reaction to obtain a mixture; wherein the molar ratio of boron in the boric acid to aluminum in the alumina is 2.6:1;

[0070] 2) Heat the mixture at 120°C and stir until the liquid becomes transparent and viscous, cool it to 80°C, and add water to adjust the density to 1.6 g / cm 3 , obtaining a phosphoaluminum adhesive;

[0071] 3) Add boric acid powder and stir until completely dissolved, then add water to adjust the density to 1.6 g / cm 3 , a modified aluminum-phosphorus adhesive with a solid content of 60-62% is obtained; wherein 8g of boric acid powder is added to every 100ml of the aluminum-phosphorus adhesive.

[0072] The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 60°C, then reacted at 150°C for 5 hours, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is 2:1.2:0.8:1. wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 6% of the total volume of the above four monomers.

[0073] Example 5

[0074] like Figure 1 As shown, an integrated rock board furniture board comprises a thin rock board surface layer 1, an adhesive layer 2, an oriented strand board bottom layer 3 (OSB board) and a bottom sealing film layer 4 arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip 6 by means of a special edge banding adhesive 5.

[0075] The thickness of the thin rock board surface layer 1 is 5 mm; the edge banding strip 6 is a concave structure, and the concave part is used to apply the special edge banding adhesive 5. The bottom layer 3 of the oriented structural particle board is made of small-diameter wood, thinning wood and wood core as raw materials, processed into shavings, and is made into an oriented structural board after deoiling, drying, gluing, directional paving, and hot pressing; the total thickness of the bottom layer 3 of the oriented structural particle board is 10 mm. The size of the shavings is 50 mm long, 15 mm wide, and 0.5 mm thick. Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinning wood and the wood core. The bottom sealing film layer 4 is a PET film with a thickness of 0.3 mm. The material of the edge banding strip 6 is ABS. The adhesive in the bonding layer 2 is a hot-melt polyurethane hot melt adhesive.

[0076] The preparation method of the above-mentioned integrated rock slab furniture board includes the following steps: after assembling the layers to form a board, using three saw blades to dry cut at one time to obtain the integrated rock slab, then coating the side of the integrated rock slab with a special edge-sealing adhesive 5, and then attaching the edge-sealing strip 6 thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue line and polishing to obtain the integrated rock slab furniture board.

[0077] Specifically, an edge-sealing adhesive for furniture panels comprises the following raw materials in parts by mass: 22 parts of polyether sulfonate waterborne polyurethane dispersion, 12 parts of modified phosphate aluminum adhesive, 28 parts of acrylic emulsion, 6 parts of filler, 3 parts of thickener and 1 part of defoamer; wherein the polyether sulfonate waterborne polyurethane dispersion is prepared by first adding twice the volume of acetone to polyether sulfonate waterborne polyurethane microspheres, and then adding one volume of water to disperse the microspheres after the microspheres are completely dissolved, and then distilling off the acetone to obtain a polyether sulfonate waterborne polyurethane dispersion with a solid content of 48%. The pH of the edge-sealing adhesive 5 is 7. The filler is light calcium carbonate.

[0078] The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps:

[0079] 1) firstly adding a 60% boric acid solution to alumina powder, stirring at room temperature, and performing an exothermic reaction to obtain a mixture; wherein the molar ratio of boron in the boric acid to aluminum in the alumina is 2.5:1;

[0080] 2) Heat the mixture at 120°C and stir until the liquid becomes transparent and viscous, cool it to 80°C, and add water to adjust the density to 1.6 g / cm 3 , obtaining a phosphorus-aluminum adhesive;

[0081] 3) Add boric acid powder and stir until completely dissolved, then add water to adjust the density to 1.6 g / cm 3, a modified aluminum-phosphorus adhesive with a solid content of 60% is obtained; wherein 5g of boric acid powder is added to every 100ml of the aluminum-phosphorus adhesive.

[0082] The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphoacetone diisocyanate and a catalyst are stirred evenly at 60°C, then reacted at 150°C for 5 hours, and after the reaction, the reactants are taken out, cooled, and crushed to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphoacetone diisocyanate is 1:1.3:0.6:1.2. wherein the catalyst is dibutyltin dilaurate (DBTDL), and the amount of the catalyst added is 6% of the total volume of the above four monomers.

[0083] Comparative Example 1

[0084] The difference between Comparative Example 1 and Example 1 is that the edge sealing adhesive of Comparative Example 1 does not contain polyether sulfonate aqueous polyurethane dispersion. The remaining components and preparation method are the same as those of Example 1.

[0085] Comparative Example 2

[0086] The difference between Comparative Example 2 and Example 1 is that the edge sealing adhesive of Comparative Example 2 does not contain modified aluminum phosphate adhesive. The remaining components and preparation method are the same as those of Example 1.

[0087] Comparative Example 3

[0088] The difference between Comparative Example 3 and Example 1 is that the edge sealing adhesive of Comparative Example 3 replaces the modified aluminum-phosphorus adhesive with aluminum-phosphorus adhesive. The remaining components and preparation method are the same as those of Example 1.

[0089] Comparative Example 4

[0090] The difference between Comparative Example 4 and Example 1 is that the edge sealing adhesive in Comparative Example 4 is EVA hot melt adhesive.

[0091] 1. Moisture-proof swelling performance test of each group of edge sealing adhesives

[0092] The integrated rock slab furniture panels of Examples 1 to 5 and Comparative Examples 1 to 4 after edge sealing were subjected to a water immersion test. Each group was provided with 15 samples. Three points were equally marked on one edge of each sample with a marker pen. The thickness of each point was measured and recorded. The samples of each group were placed in a test tank for immersion testing to ensure that the water completely submerged the samples. The samples were taken out for observation every 4 hours, and the thickness changes of each marked point of the samples were recorded. The observation was continued for 24 hours or until the thickness of at least one marked point of all the test samples exceeded 0.3mm. The bulging thickness of each board was the maximum value of the three points. If it was greater than 0.3mm, it was unqualified. The data are shown in Table 1.

[0093] Table 1 Moisture-proof swelling performance test data of each group

[0094]

[0095]

[0096] As can be seen from Table 1, as the immersion time increases, the qualified rate of the swelling edge of each group shows a downward trend. Comparative Example 4 uses EVA hot melt adhesive, but it has all swelled after immersion for 2 hours. Comparative Example 2 does not add polyether sulfonate aqueous polyurethane dispersion, and the moisture-proof swelling performance decreases significantly, indicating that the polyether sulfonate aqueous polyurethane dispersion can effectively improve the bonding strength of the edge-sealing adhesive, improve the sealing, and thus improve the water resistance. Comparative Example 2 does not add modified phospho-aluminum adhesive, and the moisture-proof swelling performance is greatly reduced, indicating that modified phospho-aluminum adhesive can improve the sealing of the adhesive, thereby affecting the water resistance. The phospho-aluminum adhesive of Comparative Example 3 is not modified with boric acid. Since the BO bond length is much smaller than the Al-O bond length, this means that the B skeleton structure is more compact than the Al skeleton structure, and it is difficult for water molecules to enter and destroy the network structure, so the water resistance of the edge-sealing adhesive not modified with boric acid is reduced.

[0097] 2. Physical and mechanical properties test of each group of integrated rock board furniture panels

[0098] 1) According to the provisions of GB / T 4897-2015 "Particleboard", the static bending strength (MOR), elastic modulus (MOE), internal bonding strength (IB), and 2h water absorption thickness expansion (TS2) were evaluated. According to the determination methods of MOR, MOE, IB, and TS2 of artificial boards in GB / T 17657-2013 "Test methods for physical and chemical properties of artificial boards and veneer artificial boards", the physical and mechanical properties were measured. The measurement site was the connection between the integrated rock board furniture board and the special edge sealing adhesive 5, and the measurement state was dry conditions, as shown in Table 2.

[0099] Table 2 Physical and mechanical properties test data of each group

[0100]

[0101]

[0102] As can be seen from Table 2, the integrated rock board furniture board and the edge banding strip 6 are connected by the special edge banding adhesive 5. The special edge banding adhesive 5 has a greater influence on the edge banding bonding performance. The physical and mechanical properties of the special edge banding adhesive 5 of Examples 1 to 5 are all due to Comparative Examples 1 to 4. Comparative Example 1 does not add polyether sulfonate aqueous polyurethane dispersion, and the mechanical properties are reduced, indicating that the polyether sulfonate aqueous polyurethane dispersion can provide good elasticity, excellent mechanical strength and high adhesion for the edge banding adhesive. Comparative Example 2 does not add modified phosphoaluminum adhesive, resulting in reduced adsorption and bonding strength with the surface of the wooden board. The phosphoaluminum adhesive of Comparative Example 3 is not modified with boric acid, and the physical and mechanical properties are also reduced, indicating that boric acid can react with phosphoric acid to form boron phosphate, and can also react with aluminum hydroxide to form a hydroxy-boric acid complex. These two substances can make the acid phosphate solution more stable. On the other hand, the vacancies of aluminum filled with boron are, in principle, conducive to the formation of a spatial network structure combined vertically and horizontally, significantly improving the cohesive strength of the adhesive layer. In addition, the bond length of the BO bond is much smaller than that of the Al-O bond, which means that the boron skeleton structure is more compact than the aluminum skeleton structure, making it more difficult for water molecules to enter and destroy the network structure, thereby improving the water resistance of the phosphate structure.

[0103] 3. Formaldehyde emission standards for each group of integrated stone furniture panels

[0104] According to the national standard GB / T 17657-2013 "Test methods for physical and chemical properties of artificial boards and veneer artificial boards", the formaldehyde emission of each group of integrated stone slab furniture boards was measured, and according to the requirements of the national standard GB / T18580-2017 "Limits of formaldehyde emission in artificial boards and their products for interior decoration and renovation materials", the formaldehyde emission of integrated stone slab furniture boards was evaluated, as shown in Table 3.

[0105] Table 3 Formaldehyde emission value data of each group of integrated stone board furniture board

[0106] Group Formaldehyde emission value (mg / 100g) Example 1 2.21 Example 2 2.23 Example 3 2.27 Example 4 2.22 Example 5 2.28 Comparative Example 1 2.25 Comparative Example 2 2.31 Comparative Example 3 2.42 Comparative Example 4 6.29

[0107] As shown in Table 3, the formaldehyde emission of the integrated rock board furniture boards of Examples 1 to 5 and Comparative Examples 1 to 3 is lower than 3 mg / 100 g, which meets the requirements of "Limited Label E1" according to the requirements of GB / T 18580-2017. Moreover, the values ​​are lower than those of Comparative Example 4, which uses EVA hot melt adhesive as the adhesive for edge sealing. This shows that the integrated rock board furniture board has the advantage of being green and environmentally friendly.

[0108] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An integrated rock board furniture board, characterized in that: It includes a thin rock board surface layer, a bonding layer, an oriented structural particle board bottom layer and a bottom sealing film layer arranged in sequence from top to bottom; wherein, the side of the furniture board is adhered with an edge banding strip by using a special edge banding adhesive; The special adhesive for edge sealing comprises the following raw materials in parts by mass: 20-30 parts of polyether sulfonate waterborne polyurethane dispersion, 10-15 parts of modified aluminum phosphate adhesive, 20-30 parts of acrylate emulsion, 5-10 parts of filler, 2-5 parts of thickener and 1-3 parts of defoamer; wherein the dispersion of polyether sulfonate waterborne polyurethane is obtained by dispersing polyether sulfonate waterborne polyurethane microspheres in acetone and water, and then removing acetone, and the pH of the special adhesive for edge sealing is 7-8; The preparation method of the modified aluminum-phosphorus adhesive comprises the following steps: 1) first adding a boric acid solution to aluminum oxide powder, stirring, and performing an exothermic reaction to obtain a mixture; 2) heating and stirring the mixture until the liquid is transparent and viscous, cooling, and adding water to adjust the density; 3) adding boric acid powder, stirring until it is completely dissolved, and then adding water to adjust the density to obtain the modified aluminum-phosphorus adhesive; The preparation method of polyether sulfonate waterborne polyurethane microspheres comprises the following steps: uniformly stirring 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol, isophosphatone diisocyanate and a catalyst at 50-60° C., reacting at 150-160° C. for 4-5 hours, taking out the reactants after the reaction, cooling and crushing to obtain polyether sulfonate waterborne polyurethane microspheres; wherein the mass ratio of 1,4-oxalic acid butylene glycol, sulfonate polyether diol, 1,4-butanediol and isophosphatone diisocyanate is (1-2): (1.1-1.5): (0.5-0.8): (1-2).

2. The integrated rock board furniture board according to claim 1, characterized in that: The thickness of the thin rock board surface layer is 3-6 mm; the edge banding strip is a concave structure, and the concave part is used for coating the special edge banding adhesive.

3. The integrated rock board furniture board according to claim 1, characterized in that: The bottom layer of the oriented structural particle board is an oriented structural board made of small-diameter wood, thinning wood and wood core as raw materials, processed into flakes, and then deoiled, dried, glued, oriented paved and hot-pressed. The thickness is 9 to 40 mm.

4. The integrated rock board furniture board according to claim 3, characterized in that: Diphenylmethane diisocyanate is used as an adhesive to bond the small-diameter wood, the thinned wood and the wood core together.

5. The integrated stone slab furniture board according to claim 1, characterized in that: The bottom sealing film layer is one of UV film, PET film, PVC film or melamine film, and has a thickness of 0.25-0.5 mm; the edge sealing strip is made of PVC or ABS.

6. The integrated rock board furniture board according to claim 1, characterized in that: The adhesive in the bonding layer is one of moisture-curing reactive polyurethane hot melt adhesive, closed polyurethane hot melt adhesive, hot melt polyurethane hot melt adhesive or ethylene-vinyl acetate copolymer.

7. The method for preparing the integrated stone slab furniture board according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: after assembling the layers to form a board, using three saw blades to perform dry cutting at one time to obtain an integrated rock board, then applying a special edge-sealing adhesive on the side of the integrated rock board, and then attaching the edge-sealing strip thereon, and then completing the edge-sealing after roller compaction, upper and lower trimming, aligning the ends, eliminating the glue lines and polishing to obtain an integrated rock board furniture board.

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