Fragrance bacteriostatic ecological board production process

Abstract

The invention provides a production process of a fragrant bacteriostatic ecological board. According to the process, through the steps of base material treatment, functional glue solution preparation, decorative film paper preparation, assembly pressing and pasting, post-treatment and the like, a natural fragrance essential oil microcapsule technology is combined with a nano formaldehyde removal and bacteriostasis material, and the functions of lasting fragrance, efficient bacteriostasis and formaldehyde decomposition of the ecological board are achieved. The base material is sanded, so that the adaptability of the base material and the functional layer is ensured; the functional glue solution adopts a low-temperature mixing process, formaldehyde decomposition effective components, a fragrance microcapsule emulsion, nano-silver and the like are added, and uniform dispersion and stable activity of the components are ensured through ultrasonic dispersion and nitrogen protection; the decorative film paper is subjected to two times of gum dipping and a drying and curing process to form a compact fragrance antibacterial functional layer; a single-layer step-by-step method or a double-layer synchronous method is adopted for assembling and pressing, and cold pressing pre-fixing and hot pressing curing are combined, so that the structural compactness and the functional stability of the plate are improved; post-treatment comprises edging finishing, surface polishing and grading packaging, and it is ensured that the finished product is accurate in size and good in appearance.

Description

Technical Field

[0001] The invention relates to the technical field of artificial board processing, and in particular to a production process of an ecological board with fragrance slow-release and high-efficiency antibacterial functions. Background Art

[0002] As people's demand for indoor environmental health and comfort increases, environmentally friendly decorative materials have gradually become the mainstream of the market. Traditional ecological boards are mostly based on artificial boards, and the decorative effect is achieved through the surface decorative film paper impregnation process, but its function is single and lacks the ability to actively regulate air quality improvement and microbial inhibition. In the existing technology, although a certain antibacterial effect can be achieved by adding antibacterial components (such as metal ions or organic compounds) to the board, there are obvious defects: first, the antibacterial agent is directly dispersed in the adhesive, which is easy to cause the active ingredients to degrade due to high processing temperature or long-term use, and the antibacterial durability is insufficient; second, the antibacterial agent has poor compatibility with the resin system and is prone to agglomeration, affecting the surface quality and mechanical properties of the board; third, some chemical antibacterial agents may release harmful substances, which is difficult to meet the environmental protection requirements of green building materials.

[0003] In terms of fragrance function, traditional aromatherapy products rely on external volatilization devices, which have problems such as short effectiveness and limited coverage. If the fragrance ingredients are directly introduced into the board, the essential oils are easily decomposed by heat or evaporate quickly in the conventional process, making it difficult to achieve long-term sustained release. Although the use of microcapsules to encapsulate fragrance ingredients in the existing technology has a certain effect, the combination stability of the microcapsules and the board adhesive is insufficient, resulting in a short fragrance release cycle, and the high-temperature pressing process is prone to capsule rupture, making it difficult to ensure the durability of the function.

[0004] In addition, existing functional ecological boards do not pay enough attention to the coordinated optimization of substrate pretreatment and functional layer. For example, improper control of substrate moisture content can easily lead to cracking of the veneer; poor matching between the glue parameters and the process during the preparation of the functional layer causes uneven distribution of effective ingredients, affecting the overall performance of the board. These problems limit the practical application and market promotion of functional ecological boards. Summary of the invention

[0005] The purpose of the present invention is to provide a production process for an aroma antibacterial ecological board, which combines natural aroma essential oils with microcapsule technology and nano antibacterial materials to achieve long-lasting sustained release of aroma and high-intensity antibacterial, while optimizing the substrate treatment process to solve the problem of surface cracking.

[0006] The production process of the fragrance antibacterial ecological board of the present invention achieves the long-lasting fragrance, high-efficiency antibacterial and surface stability of the ecological board through the steps of substrate treatment, functional glue preparation, decorative film paper preparation, assembly pressing and post-processing, combined with natural fragrance essential oil microcapsule technology and nano antibacterial materials.

[0007] The present invention provides a production process for a fragrance antibacterial ecological board, which specifically includes the following steps: S1 Substrate treatment: Sand the substrate, and control the error of the thickness and surface finish of the substrate after sanding to not exceed 0.15 mm, and the moisture content to not exceed 10%; Eliminate the unevenness and burrs on the surface of the substrate through the sanding process, ensure that the substrate thickness error ≤ 0.15 mm, the surface finish meets the standard, and provide a uniform basis for the subsequent lamination of the decorative film; Control the substrate moisture content ≤ 10% to avoid veneer cracking or adhesive layer debonding caused by humidity fluctuations and improve the stability of the board.

[0008] S2 Functional adhesive liquid preparation: Mix and stir the formaldehyde decomposition active ingredient with a mass ratio of 5 - 10%, the fragrance microcapsule emulsion with a mass ratio of 1.5 - 3%, 75 - 150 ppm of nano silver and nano silicon wafers, and amino resin at 20 - 35 °C to prepare a fragrance antibacterial and formaldehyde purification functional adhesive liquid; After the formaldehyde decomposition active ingredient (such as chitin or biological enzyme preparation) is mixed with the amino resin, the adhesive liquid is given the ability to actively decompose formaldehyde; Amino resin (melamine formaldehyde resin or modified urea formaldehyde resin) is used as the main body of the adhesive liquid to provide high bonding strength and weather resistance; Low-temperature stirring at 20 - 35 °C avoids pre-curing of the resin or inactivation of the active ingredient and ensures the chemical activity of the adhesive liquid.

[0009] S3 Decorative film paper preparation: Immerse the decorative paper in amino resin adhesive liquid and fragrance antibacterial and formaldehyde decomposition adhesive liquid in sequence, and make a fragrance antibacterial functional decorative adhesive film paper through heating and drying; The amino resin adhesive liquid immersion forms the basic wear-resistant layer of the decorative film, endowing the surface with scratch resistance and pollution resistance; The formaldehyde decomposition adhesive liquid is immersed for the second time to load antibacterial components such as fragrance microcapsules and nano silver, realizing the integration of the functional layer and the decorative layer; Heating and drying, through thermal curing, crosslinks and cures the adhesive liquid to ensure that the functional components are stably embedded in the decorative film structure.

[0010] S4 Lamination and pressing: Use a single-layer or double-layer decorative film to form a laminate with the substrate, and the pressing process parameters are pressure 0.5 - 1.0 Mpa, temperature 110 - 135 °C, and time 6 - 15 min to ensure the bonding of the adhesive film and the substrate; The single-layer decorative film pressing reduces the concentration of thermal stress through step-by-step pressing and is suitable for high-precision symmetry requirements; The double-layer decorative film pressing improves the efficiency through synchronous hot pressing and enhances the consistency of the double-sided function; Through the synergistic action of temperature and pressure, promote the physical-chemical combination of the adhesive film and the substrate to ensure the density of the board structure.

[0011] S5 Post-treatment: Trim the edges of the pressed board, grade and pack it according to quality standards to obtain the finished fragrance antibacterial ecological board; Edge trimming eliminates rough edges and dimensional deviations, ensuring that the edge perpendicularity of the board ≤ 0.5 mm / m; Grading and packing can be classified according to fragrance intensity, antibacterial rate, surface defect rate, etc., and combined with moisture-proof packaging (aluminum foil vacuum film + desiccant) to ensure the stability of the finished product during storage and transportation.

[0012] This process realizes long-term antibacterial, fragrance slow release and environmental protection and safety, and improves process stability through substrate pretreatment, functional adhesive liquid compounding, functional impregnation of decorative film, precise assembly and lamination, and post-treatment standardization. The synergistic effect of nano silver and formaldehyde decomposition components inhibits the growth of microorganisms and purifies formaldehyde; the microcapsule technology ensures the slow release of essential oils such as sandalwood and agarwood, and the fragrance lasts; there are no harmful chemical additives, and the formaldehyde release meets the healthy home standard; the moisture content of the substrate and the parameters of the adhesive liquid are precisely controlled to avoid defects such as cracking and delamination, and improve the yield. This invention integrates antibacterial, fragrance and formaldehyde decomposition functions into a single decorative film, breaking through the single function of traditional boards; the low-temperature adhesive liquid modulation and step-by-step lamination design solve the problem of damage to microcapsules and nano components caused by high temperature; the use of natural fragrance essential oils and environmentally friendly resin systems takes into account health needs and production cost control.

[0013] In the production process of this invention, the substrate treatment specifically includes the following steps: S1.1 Material selection: Select plywood, particle board, MDF or blockboard as the substrate; select plywood (high stability), particle board, MDF (excellent surface flatness) or blockboard (high mechanical strength) as the substrate to ensure that the substrate type is suitable for the performance of the target product (such as moisture resistance and load-bearing capacity), and provide a physical basis for the subsequent functional layer loading.

[0014] S1.2 Sanding: Process with 120-mesh, 180-mesh, and 240-mesh sanding belts in sequence through a thickness sanding machine, control the surface roughness Ra≤5μm, and the thickness error≤0.15mm to ensure the flatness and adaptability of the substrate; through 120-mesh → 180-mesh → 240-mesh progressive sanding, eliminate the burrs, fiber warping and micro depressions on the substrate surface, control the surface roughness Ra≤5μm, and improve the uniformity of decorative film lamination; the thickness error of the substrate after sanding is≤0.15mm to avoid stress concentration or adhesive layer defects caused by uneven thickness; the microscopically rough surface after sanding can increase the penetration and anchorage area of the adhesive, increase the contact area, and significantly enhance the bonding strength.

[0015] S1.3 Laminating: Use two-component polyurethane adhesive to hot-press and laminate poplar veneer or reconstituted decorative veneer with a thickness of 0.3 - 1.0 mm and a moisture content ≤ 12% on the surface of the substrate with an error exceeding 0.15 mm. The process parameters are 110 - 130 °C, 0.8 - 1.2 MPa, and 30 - 60 s. After lamination, the moisture content of the substrate ≤ 10% to avoid the risk of cracking; correct the defects of the substrate with a thickness error > 0.15 mm or insufficient surface smoothness, and compensate for the surface flatness of the substrate by hot-pressing and laminating 0.3 - 1.0 mm poplar veneer or reconstituted decorative veneer; after lamination, the moisture content of the substrate ≤ 10% to reduce the internal stress caused by the humidity gradient and avoid veneer cracking or warping; the two-component polyurethane adhesive is hot-pressed at 110 - 130 °C and 0.8 - 1.2 MPa for 30 - 60 s to form a dense cross-linked network and enhance the interfacial bonding strength between the substrate and the veneer.

[0016] In this production process, the substrate treatment realizes the standardization of substrate quality, the improvement of process stability, and the guarantee of the long-term effectiveness of the functional layer through material selection adaptability optimization, sanding surface finishing, and lamination defect repair. The indicators such as the thickness, moisture content, and surface roughness of the substrate are strictly controllable, providing a physical basis for the uniform loading of the functional layer; reducing the defective lamination rate caused by substrate defects and improving the finished product rate; the flat and low-moisture-content substrate reduces stress concentration and humidity deformation, avoiding the damage of fragrance microcapsules or the peeling of the antibacterial layer. The substrate type of the present invention matches the sanding parameters, taking into account both cost and performance; flexibly adjusts the surface quality of the substrate through the lamination process, dynamically corrects defects, and reduces raw material waste; the two-component polyurethane adhesive does not release free formaldehyde, meeting the requirements of green building materials.

[0017] In the production process of the present invention, the modulation of the functional adhesive solution specifically includes the following steps: S2.1 Preparation of fragrance antibacterial and formaldehyde decomposition adhesive solution: Mix the formaldehyde decomposition active ingredient with a mass ratio of 5 - 10% and amino resin, and mechanically stir at a speed of 300 - 500 rpm for 5 - 10 minutes until the adhesive solution is uniform and particle-free; the formaldehyde decomposition active ingredient (such as chitin or enzyme preparation) decomposes formaldehyde through high-efficiency amino activation or enzymatic hydrolysis reaction to reduce the formaldehyde concentration in the surface space of the board; amino resin (melamine formaldehyde resin or modified urea formaldehyde resin) is used as the main body of the adhesive solution, and the adhesive solution matrix is formed to provide high bonding strength and weather resistance; mechanically stir at 300 - 500 rpm for 5 - 10 minutes for uniform dispersion control to ensure the full mixing of the active ingredient and the resin and avoid the failure of the functional layer caused by particle agglomeration.

[0018] S2.2 Addition of fragrance and antibacterial components: Add 1.5 - 3% of fragrance microcapsule emulsion, 75 - 150 ppm of nano silver and nano silicon wafers to the above-mentioned glue solution in sequence, and stir at a low speed of 100 - 200 rpm for 10 - 15 minutes to avoid rupture of microcapsules; Nano silver destroys the microbial cell membrane by releasing silver ions, achieving long-term antibacterial effect; Nano silicon wafers are used as carriers to load nano silver, improving the dispersion stability, and at the same time enhancing the interfacial bonding between the glue solution and the substrate through surface hydroxyl groups; The fragrance microcapsule emulsion (containing essential oils such as sandalwood, agarwood, borneol, and pepper fragrance) slowly releases fragrance through the wall material (cross-linked structure of gum arabic + isophorone diisocyanate), with long-lasting fragrance; Stirring at a low speed of 100 - 200 rpm avoids mechanical damage to microcapsules and ensures the integrity of functional components.

[0019] S2.3 Mixing of auxiliary additives: Add 0.1 - 0.3% of curing agent, 0.1 - 0.2% of penetrant, and 0.01 - 0.1% of release agent in proportion, and treat with an ultrasonic disperser at a frequency of 30 - 50 kHz and a power of 100 - 300 W for 5 - 10 minutes while introducing nitrogen for protection to ensure uniform dispersion of components and obtain a formaldehyde-decomposing functional glue solution; Add 0.1% - 0.3% of isocyanate curing agent (such as HDI trimer) to promote cross-linking and curing of the glue solution under hot pressing conditions, shortening the process cycle; 0.1% - 0.2% of non-ionic penetrant (such as alkylphenol polyoxyethylene ether) reduces the surface tension of the glue solution and increases its penetration depth into the fibers of the decorative film paper; 0.01% - 0.1% of polydimethylsiloxane release agent reduces the adhesion between the glue solution and the pressing plate and ensures the smoothness of the decorative film surface; Ultrasonic dispersion at 30 - 50 kHz combined with nitrogen protection prevents oxidation and agglomeration of nano particles and at the same time inhibits pre-curing of the glue solution.

[0020] In the functional glue solution modulation step of this production process, through a three-step modulation process, the functional glue solution realizes multi-functional integration, process adaptation, environmental protection and safety, and ensures performance stability. The formaldehyde decomposition, antibacterial, and fragrance slow-release functions work synergistically, breaking through the singularity of traditional glue solutions; Low-temperature mixing (20 - 35 °C) and ultrasonic dispersion ensure the activity of heat-sensitive components (microcapsules, nano silicon, silver); No heavy metals / organic solvents are added, meeting environmental protection standards; The viscosity and pH value of the glue solution are precisely controlled to adapt to the requirements of the impregnation process. In the present invention, the ratio of functional components to auxiliary additives is optimized to balance performance and cost; Ultrasonic + nitrogen protection solves the problem of nano particle agglomeration; The microcapsule encapsulation process combined with low-temperature dispersion reduces the attenuation rate of the fragrance and antibacterial functions.

[0021] In the production process of the present invention, the modulation of the functional glue solution specifically includes: The formaldehyde decomposition active ingredient accounts for 5-10% of the mass of the glue solution. The amino resin is melamine formaldehyde resin or melamine-modified urea formaldehyde resin. The formaldehyde decomposition active ingredient (such as chitin / bioenzyme) targets and decomposes formaldehyde through efficient amino activation or enzymatic hydrolysis reactions to ensure that the formaldehyde purification efficiency of the board is ≥75%. The amino resin uses melamine formaldehyde resin (MF) or melamine-modified urea formaldehyde resin (MUF) as the glue solution matrix to provide high bonding strength and heat and humidity resistance.

[0022] The reaction temperature for preparing the functional glue solution is controlled at 20-35°C throughout the process to avoid pre-curing of the resin or inactivation of heat-sensitive components. The mechanical stirring speed is 300-500 rpm, and the mixing time is 5-10 min to ensure that the glue solution is uniform and particle-free.

[0023] The fragrance microcapsule emulsion in the functional glue solution includes: a fragrance additive composed of sandalwood, agarwood, borneol, and pepper essential oils with a mass ratio of 50-70%, 10-20%, 10-20%, and 5-10%, an oil phase formed by mixing with isophorone diisocyanate in a mass ratio of 1-3:1, and an aqueous phase of gum arabic with a mass ratio of 50-70%. After high-pressure homogenization emulsification and thermal reaction, a microcapsule system is formed to achieve slow release and stable loading of fragrance components. The fragrance microcapsule emulsion is prepared by compounding an oil phase and an aqueous phase. The oil phase composition includes a fragrance additive and a cross-linking agent. The fragrance additive is compounded according to the mass ratio of 50%-70% sandalwood essential oil, 10%-20% agarwood resin essential oil, 10%-20% borneol essential oil, and 5%-10% pepper essential oil to endow natural fragrance function. The cross-linking agent is isophorone diisocyanate (IPDI), which is mixed with the fragrance essential oil in a mass ratio of 1:1-3:1 to form a hydrophobic core. The wall material of the aqueous phase composition is gum arabic, with a polysaccharide content ≥70% and a protein content ≤25%. It is dissolved in deionized water at a mass ratio of 50%-70% to form a viscoelastic aqueous phase. The preparation of microcapsules includes: high-pressure homogenization emulsification of the oil phase and the aqueous phase at a pressure of 50-100 MPa for 3 cycles to form an emulsion with a particle size ≤5 μm, followed by a thermal reaction at 70-80°C for 1-3 hours, and cross-linking and curing of IPDI with the hydroxyl groups in gum arabic to achieve fragrance slow release. The nano silver and silicon wafers are pre-dispersed in deionized water to prepare a nano silver / silicon wafer suspension with a concentration of 1-2% and then added to avoid agglomeration. During the pre-dispersion of the nano suspension, the particle size of nano silver is 20-50 nm, and the specific surface area is ≥50 m² / g; the thickness of nano silicon wafers is ≤5 nm, and the aspect ratio is ≥100; the two are pre-dispersed in deionized water at a concentration of 1%-2% and treated by ultrasonic waves to avoid agglomeration.

[0024] The compounding process of the functional adhesive solution by compound molding includes the addition of antibacterial components, auxiliary additives, and dispersion strengthening. Add 1.5%-3% fragrance microcapsule emulsion and 75-150 ppm pre-dispersed nano-silver / silicon wafer suspension to the formaldehyde decomposition adhesive solution; add 0.1%-0.2% alkylphenol polyoxyethylene ether penetrant and 0.01%-0.1% polydimethylsiloxane demolding agent in proportion; treat with an ultrasonic disperser at a frequency of 30-50 kHz and a power of 100-300 W for 5-10 minutes, while passing nitrogen gas for protection to inhibit oxidation and pre-curing and ensure uniform dispersion of the components.

[0025] Through scientific proportioning and precise process control, the functional adhesive solution of the present invention realizes the functions of efficient formaldehyde purification, long-term antibacterial, and fragrance slow release, adapts to the requirements of the ecological board impregnation process, and provides core technical support for healthy home materials. The combination of formaldehyde decomposition, antibacterial, and fragrance slow release breaks through the limitation of the single function of traditional adhesive solutions; nano-silicon wafers enhance the interfacial bonding force and improve the bonding strength; low-temperature reaction, with temperature control protection at 20-35 °C throughout the process to protect the activity of heat-sensitive components (microcapsules, nano-silver); pre-dispersion technology solves the problem of nanoparticle agglomeration and ensures the uniformity of the functional layer; no heavy metals / organic solvents are added to control the free formaldehyde release amount; natural fragrance essential oils (sandalwood, agarwood) meet international fragrance standards and have no skin irritation.

[0026] In the production process of the present invention, the preparation of the decorative film specifically includes the following steps: S3.1 Decorative paper pretreatment: Select decorative base paper or printed paper with a moisture content ≤ 8% and a basis weight of 70-120 g / m². After inkjet marking, remove surface impurities through an electrostatic dust removal device to ensure cleanliness before impregnation; select decorative base paper with a basis weight of 70-120 g / m² to ensure the mechanical strength of the paper and its suitability for impregnation; control the moisture content of the decorative paper ≤ 8% to avoid uneven penetration of the adhesive solution or paper deformation during impregnation; remove surface dust through an electrostatic dust removal device (voltage 10-15 kV) to improve the interfacial bonding force between the adhesive solution and the fibers and enhance the bonding strength.

[0027] S3.2 First dipping: Immerse the decorative paper into the amino resin adhesive solution at a speed of 20-40 m / min, and control the dipping amount to 60%-90%. After dipping, the adhesive solution on the paper surface is evenly covered; the dipping amount of the amino resin adhesive solution (melamine formaldehyde resin) is 60%-90% (by mass ratio) to form a highly wear-resistant and pollution-resistant surface and construct a basic functional layer; the dipping speed is 20-40 m / min to ensure that the adhesive solution evenly penetrates into the paper fiber pores and avoid defects caused by insufficient local adhesive amount; after dipping, there is no exposed bottom or adhesive solution accumulation on the paper surface, providing a flat base for the second dipping.

[0028] S3.3 Primary drying and pre-curing: Use hot air circulation drying at a temperature of 80 - 130°C, a wind speed of 3 - 5 m / s, a paper feeding speed of 20 - 40 m / min, a pre-curing degree of 30% - 70%, and reduce the volatile content to 8% - 12%; Hot air circulation drying reduces the volatile content (such as water, free formaldehyde, etc.) to 8% - 12%, reducing pollution in subsequent processes; Control the pre-curing degree at 30% - 70% to retain some active groups for chemical bonding of the functional layer during secondary impregnation; The paper feeding speed of 20 - 40 m / min matches the drying rate to prevent paper shrinkage and deformation.

[0029] S3.4 Secondary impregnation: Immerse the decorative paper after primary drying into a formaldehyde decomposition functional adhesive solution containing 1.5% - 3% fragrance microcapsule emulsion and 75 - 150 ppm nano silver / silicon wafers, and control the impregnation amount at 60% - 90% to ensure uniform loading of functional components; The impregnation amount of the adhesive solution containing fragrance microcapsule emulsion and nano silver / silicon wafers is 60% - 90% to ensure uniform distribution of antibacterial and fragrance components and achieve loading of functional components; Nano silicon wafers act as carriers to enhance the dispersion of nano silver, and the synergistic effect strengthens the antibacterial rate; The formaldehyde decomposition active ingredient (such as chitin or bio-enzyme preparation) penetrates into the fiber interior through the adhesive solution to achieve dual-effect purification of formaldehyde adsorption - decomposition.

[0030] S3.5 Secondary drying and curing: Conduct secondary drying through infrared radiation with a wavelength of 2.5 - 5 μm and a temperature of 100 - 120°C for 5 - 8 min to completely cure the adhesive solution, with a curing degree ≥ 90%, forming a dense fragrance antibacterial functional layer, cutting to the target size to obtain a fragrance antibacterial functional decorative film paper; The infrared radiation wavelength of 2.5 - 5 μm and a temperature of 100 - 120°C directly penetrates the adhesive layer, and within 5 - 8 min, the resin curing degree ≥ 90%, shortening the process cycle and achieving efficient curing; After curing, a continuous and dense film layer is formed to block the penetration of moisture and oxygen, extending the fragrance slow-release cycle; The numerical control cross-cutting machine cuts to the target size to ensure the adaptability of the decorative film and the substrate assembly, with a size deviation ≤ 0.5 mm / m, achieving cutting standardization.

[0031] The preparation steps of the decorative film of the present invention achieve multi-functional integration, process adaptation, and environmental protection effects through five-step processes. The composite of the basic wear-resistant layer and the fragrance antibacterial functional layer endows the board with decoration, antibacterial properties, and air purification ability; The step-by-step impregnation and drying design avoid thermal degradation of functional components; The formaldehyde release amount ≤ 0.5 mg / L (E0 level), and the fragrance essential oil meets safety standards; The cured adhesive film is resistant to heat and humidity and scratch-resistant. The present invention optimizes the impregnation amount gradient, taking into account both functional loading and cost; Infrared radiation drying is more energy-efficient than traditional hot air; The microcapsule wall material (gum arabic + IPDI) has excellent anti-permeability, improving the fragrance retention rate and ensuring long-term functions.

[0032] In the production process of the present invention, the blank assembly and lamination include two methods: S4.1 single-layer decorative film step-by-step lamination and S4.2 double-layer decorative film synchronous lamination; the single-layer step-by-step lamination ensures high precision and symmetry through step-by-step operations, avoids thermal stress concentration, and adapts to complex design requirements; the double-layer synchronous lamination simplifies the process and improves efficiency, is suitable for standardized production, and ensures the consistency of double-sided functions and structural strength.

[0033] In the blank assembly and lamination step of the production process of the present invention, the specific steps of the single-layer decorative film step-by-step lamination are as follows: S4.1-1 Unilateral lamination: Align the single-layer fragrance and antibacterial decorative film paper (with the functional side facing outwards) with the substrate, feed it into the hot press, and laminate it for 6-12 minutes under the conditions of a pressure of 0.5-1.0 MPa and a temperature of 110-130 °C to achieve the cross-linking and curing of the amino resin in the film, form a physical-chemical bond between the film and the substrate, and improve the bonding strength; the temperature activates the slow-release mechanism of the fragrance microcapsules and the antibacterial activity of the nano silver, ensuring the initial performance of the functional components; the pressure and temperature match the resin curing kinetics, avoid thermal damage to the functional layer, and reduce the microcapsule breakage rate.

[0034] S4.1-2 Cooling and shaping: After lamination, the board is cooled by a cooling roller at 20-25 °C and a wind speed of 8-10 m / s to below 40 °C, with a volatile content of ≤5%, eliminating internal stress and stabilizing the adhesive layer structure; reducing the internal stress generated by hot pressing through gradient cooling, reducing the risk of board warping; quickly cooling to lock the resin cross-linking structure, preventing the adhesive layer from rebounding or deforming; removing residual solvents and free formaldehyde, controlling the volatile content, and ensuring the environmental protection of the board.

[0035] S4.1-3 Lamination on the other side: Flip the substrate and repeat the operation of the unilateral lamination step to laminate the decorative film on the other side, with a thickness deviation of ≤0.1 mm, ensuring the symmetry of double-sided functions; ensuring that the difference in fragrance release rates on both sides is ≤10% and the antibacterial rates are the same; strictly controlling the thickness deviation within ±0.1 mm to avoid visual or tactile differences and improve aesthetics; repeating the lamination with the same parameters to reduce human operation errors and improve the finished product rate.

[0036] S4.1-4 Substrate blank assembly: Assemble the fragrance and antibacterial decorative film paper with the functional side facing outwards with the substrate after unilateral lamination, and the assembled board is hot-pressed again at 110-130 °C under 0.5-1.0 MPa for 6-12 minutes, with a density deviation of ≤3% for the particleboard and MDF substrates, ensuring the compactness of the overall structure.

[0037] The step-by-step laminating process of the single-layer decorative film of the present invention realizes high-precision symmetry, structural stability, and long-term functional guarantee through the step-by-step laminating process. The thickness and performance of the double-sided functional layers are consistent, meeting the requirements of high-end customized furniture; the core layer and the functional layer cooperate to enhance, with the warpage curvature of the board ≤ 0.5 mm / m and excellent resistance to heat and humidity; the fragrance release period is extended, the antibacterial rate is increased, and the formaldehyde purification efficiency is improved. The present invention controls the temperature step by step, avoiding the cumulative damage to the functional components caused by high temperature through single-sided laminating and cooling and shaping; combining cold pressing and hot pressing, cold pressing for pre-fixing and hot pressing for densification, balancing efficiency and quality; no harmful substances are released throughout the process, meeting the green building material standards.

[0038] In the blanking and laminating step of the production process of the present invention, the synchronous laminating of the double-layer decorative film specifically includes the following steps: S4.2-1 Blanking configuration: Place the functional surfaces of the double-layer fragrance antibacterial decorative film paper facing outward, respectively on the upper and lower surfaces of the substrate, with a core layer material of plywood, particle board, MDF, or honeycomb board in the middle, forming a sandwich structure of decorative film - substrate - decorative film; after structural optimization, the particle board core layer has a low cost and high compressive strength, suitable for standardized boards; the honeycomb board core layer is lightweight and high-strength, suitable for scenarios with large spans or weight reduction requirements; the double-sided decorative film synchronously loads fragrance microcapsules and nano antibacterial components to ensure the consistency of the functions on both sides of the board; one-time blanking reduces manual intervention and reduces operation errors.

[0039] S4.2-2 Synchronous hot pressing: Directly send it into a multi-layer hot press and laminate for 8 - 15 minutes under the conditions of a pressure of 0.5 - 1.0 MPa and a temperature of 115 - 135 °C, with the curing degree of the glue layer ≥ 95%, realizing the one-time composite of the double-sided decorative film and the substrate; high temperature and high pressure promote the cross-linking of amino resins, improving the bonding strength; synchronously activate the slow-release mechanism of the double-sided fragrance microcapsules and the antibacterial activity of nano silicon and silver; eliminate the interlayer voids, with the density deviation of the board ≤ 3%, improving the impact resistance.

[0040] S4.2-3 Cooling and stabilization: After laminating, the board is slowly cooled to room temperature by an air-cooling system, controlling the moisture content ≤ 10% to avoid warping and deformation; gradient cooling avoids internal stress concentration caused by sudden temperature changes, with the warpage curvature of the board ≤ 0.3 mm / m; an infrared moisture meter monitors the moisture content in real time to prevent the core layer from absorbing moisture and swelling or the functional layer from cracking; the dimensional change rate of the board after cooling ≤ 0.2%, with stable dimensions, meeting the requirements of high-precision processing.

[0041] In this production process, the one-time synchronous pressing improves the efficiency by 40%-50% compared with the step-by-step process, making it suitable for batch industrial production. The double-sided functional layer and the core layer cooperate to enhance the mechanical properties, while ensuring the long-term fragrance release and antibacterial effectiveness. The free formaldehyde release amount is ≤0.5mg / L (E0 level), and the fragrance essential oil meets international safety standards. The temperature-pressure-time parameters of the present invention are optimized based on resin curing kinetics to avoid thermal damage to the functional layer. The core layer material can be flexibly adapted to requirements, with particleboard reducing costs and honeycomb board achieving light weight and high strength. Through the cooling process and moisture content control, the dimensional stability of the finished product reaches the leading level in the industry.

[0042] In the production process of the present invention, the post-treatment specifically includes the following steps: S5.1 Edge trimming: Use a numerical control panel saw to cut the four sides of the pressed board to remove burrs and overflow glue, ensure that the dimensions meet the requirements, and the edge perpendicularity error is ≤0.5mm / m; standardize the dimensions, accurately cut to eliminate edge deformation caused by hot pressing, and adapt to downstream processing requirements; optimize the interface, smooth the edges to reduce stress concentration during installation, and improve the splicing tightness of the board; provide a geometric reference for subsequent surface polishing and grading to avoid sorting errors caused by dimensional deviations.

[0043] S5.2 Grading and packaging: Sort according to quality standards, divide the boards into first-class products, first-grade products, and qualified products, and obtain the finished fragrance and antibacterial ecological board after packaging; use an aluminum foil composite film for vacuum packaging, with a silica gel desiccant inside to absorb moisture, and add protective anti-collision corners outside; laser mark the grade, batch number, and production date, and stack them on a standardized pallet; through grading, ensure that the product performance and appearance meet customer requirements, and reduce the defect rate of first-class products; moisture-proof packaging and buffer design avoid moisture absorption and collision damage during transportation; the identification system supports quality tracking throughout the life cycle to ensure product quality stability.

[0044] In the post-treatment steps of this production process, through precise cutting, surface finishing, and scientific sorting and packaging, the unity of function and beauty, quality controllability, and environmental protection and long-term effectiveness are achieved. The present invention combines a surface roughness Ra ≤ 1.6μm with the slow-release function of fragrance microcapsules to meet the visual and olfactory experiences of high-end homes; the grading standard strictly controls performance fluctuations and improves the first-class product rate; moisture-proof packaging combined with a low moisture content (≤10%) ensures an extended storage period, an increased fragrance retention rate, and an improved antibacterial rate.

[0045] Through technological integration and process innovation, the present invention solves the pain points of traditional ecological boards, such as single function, component inactivation, and insufficient environmental protection, realizes the long-term synergy of antibacterial, fragrance, and formaldehyde purification, and at the same time takes into account light weight, high strength, and decorative beauty, providing high-performance green building material solutions for medical, home, education and other fields, and promoting the industry to upgrade towards health and low carbon.

[0046] In summary, the present invention has the following beneficial effects: 1. The present invention encapsulates natural essential oils such as sandalwood and agarwood in a wall material crosslinked by gum arabic and isophorone diisocyanate (IPDI) through microcapsule sustained-release technology, achieving an extended aroma release period, solving the problems of easy volatilization and oxidative failure of traditional fragrance components, and creating a comfortable olfactory environment; nano silver and silicon wafers have a synergistic antibacterial mechanism, and the antibacterial rate against common pathogens such as Escherichia coli and Staphylococcus aureus is ≥99%, meeting the high hygiene standard requirements of medical treatment, home, etc.; formaldehyde decomposition active ingredients (such as chitin and bioenzyme preparations) degrade formaldehyde through efficient amino activation, improving the formaldehyde purification efficiency, and significantly improving the indoor air quality through the synergistic effect of bioenzymes and amino resins, and the triple effect synergistically breaks through the single functionality of traditional boards. 2. The functional glue solution of the present invention adopts a low-temperature mixing process, combined with ultrasonic dispersion and nitrogen protection, to make the nanoparticles uniformly dispersed and improve the stability of the glue solution; in the step-by-step dipping process, the amino resin glue solution forms a wear-resistant base layer, and the second dipping loads fragrance microcapsules and nano antibacterial components. Infrared radiation drying saves energy compared with traditional hot air, and the curing degree is improved, and the surface density is significantly improved. 3. In the production process of the present invention, the base materials used and the base materials with a thickness error > 0.15 mm are defect-corrected. By hot-pressing and laminating 0.3-1.0 mm poplar veneer or reconstituted decorative veneer, the surface flatness of the base material is compensated; the combination of cold pressing pre-fixing and step-by-step hot pressing realizes the improvement of the gluing strength, and at the same time avoids thermal damage to the microcapsules; ultrasonic pre-dispersion of nano silver / silicon wafers combined with nitrogen protection prolongs the storage period of the glue solution. 4. The blank assembly and laminating method of the present invention adapts to diversified needs. The single-layer step-by-step lamination ensures that the difference in the fragrance release rate is ≤10% through double-sided independent lamination and cooling and shaping, adapting to high-end customized furniture; the double-layer synchronous lamination adopts a decorative film-core layer-decorative film sandwich structure, completing double-sided compounding at one time, improving the efficiency, and the honeycomb board core layer has high static bending strength, combining light weight and high load-bearing performance. 5. During the production process of the present invention, the sandwich structure realizes the balance of functions and mechanical properties. The composite design of the double-sided functional layers (fragrance and antibacterial) and the core layer (particle board / honeycomb board) has both improved formaldehyde purification efficiency, antibacterial rate and high mechanical properties; the natural fragrance essential oil has no heavy metal addition, and the production process is safe and environmentally friendly; the step-by-step process reduces raw material waste, and the core layer materials (multi-layer board, particle board, MDF / honeycomb board) flexibly adapt to cost and performance requirements. Description of the Drawings

[0047] Figure 1 It is a schematic diagram of the production process flow of the fragrance and antibacterial ecological board. Detailed Embodiments

[0048] This specific embodiment is only an interpretation of the present invention and not a limitation thereof. After reading this specification, those skilled in the art may make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

[0049] Example 1

[0050] S1 Substrate treatment: Select a multi-layer board as the substrate, and sand it successively with 120-mesh, 180-mesh, and 240-mesh abrasive belts using a thickness planer sander, controlling the substrate thickness error ≤ 0.15 mm, surface roughness Ra ≤ 5 μm, and moisture content of 10%; S2 Functional adhesive solution preparation: Mix 7% by mass of nano-titanium dioxide (the effective ingredient for formaldehyde decomposition) with melamine formaldehyde resin, stir evenly, then add 2% of the fragrance microcapsule emulsion (55% sandalwood essential oil, 15% agarwood essential oil, 15% borneol essential oil, 10% pepper essential oil) and 100 ppm of nano-silver / silicon wafer suspension, stir at low speed for 10 minutes, and finally add 0.2% curing agent, 0.1% penetrant, and 0.05% release agent, and perform ultrasonic dispersion treatment for 8 minutes; S3 Decorative film preparation: Select decorative base paper with a basis weight of 100 g / m² and a moisture content of 8%, and successively perform primary impregnation (amino resin adhesive solution, impregnation amount 70%), primary drying (120 °C, wind speed 4 m / s), secondary impregnation (functional adhesive solution, impregnation amount 70%), and secondary drying and curing (infrared radiation, wavelength 3 μm, temperature 110 °C, time 6 minutes); S4 Laminating and pressing: Use a single-layer decorative film for step-by-step lamination, with a pressure of 0.8 MPa, a temperature of 120 °C, and a lamination time of 10 minutes. After cooling and shaping, flip it over and laminate the other side, and finally form a laminate with the particleboard core layer, cold press and fix it, and then perform hot pressing again; S5 Post-treatment: Trim the edges with a numerical control panel saw, polish with a 280-mesh sander, with surface roughness Ra ≤ 1.6 μm, grade and pack, to obtain the finished product of the fragrance and antibacterial ecological board.

[0051] Example 2

[0052] S1 Substrate treatment: Select a plywood as the substrate, with a thickness error ≤ 0.15 mm after sanding and a moisture content of 9%; S2 Functional adhesive solution preparation: The proportion of the effective ingredient for formaldehyde decomposition is 8%, use urea-formaldehyde resin modified with melamine, add 2.5% of the fragrance microcapsule emulsion (60% sandalwood essential oil, 12% agarwood essential oil, 13% borneol essential oil, 10% pepper essential oil) and 120 ppm of nano-silver / silicon wafer suspension, and the other steps are the same as in Example 1; S3 Decorative film preparation: Printing paper with a basis weight of 120 g / m², primary impregnation amount 75%, secondary impregnation amount 75%, infrared radiation curing temperature 115 °C, time 7 minutes; S4 Lamination of assembled boards: Double-layer decorative films are laminated synchronously with a pressure of 0.9 MPa, a temperature of 130 °C, and a lamination time of 12 minutes, followed by cooling to room temperature. S5 Post-treatment: The same as in Example 1 to obtain the finished product of the fragrance and antibacterial ecological board.

[0053] Example 3

[0054] S1 Substrate treatment: Select blockboard as the substrate, and sand it successively with 120-mesh, 180-mesh, and 240-mesh abrasive belts using a thickness planer sander, controlling the substrate thickness error ≤ 0.15 mm, surface roughness Ra ≤ 5 μm, and moisture content of 10%. S2 Preparation of functional adhesive solution: Mix the formaldehyde decomposition active ingredient (nano-titanium dioxide) with a mass ratio of 10% and melamine formaldehyde resin, stir evenly, add 3% of the fragrance microcapsule emulsion (70% sandalwood essential oil, 20% agarwood essential oil, 10% borneol essential oil) and 150 ppm of nano-silver / silicon wafer suspension, stir at low speed for 15 minutes, and finally add 0.3% curing agent, 0.2% penetrant, and 0.1% mold release agent, and perform ultrasonic dispersion treatment for 10 minutes with a frequency of 50 kHz and a power of 300 W. S3 Preparation of decorative film: Select decorative base paper with a basis weight of 120 g / m² and a moisture content of 8%, and perform primary impregnation (amino resin adhesive solution, impregnation amount 90%), primary drying (130 °C, wind speed 5 m / s), secondary impregnation (functional adhesive solution, impregnation amount 90%), and secondary drying and curing (infrared radiation, wavelength 5 μm, temperature 120 °C, time 8 minutes) in sequence. S4 Lamination of assembled boards: Double-layer decorative films are laminated synchronously with a pressure of 1.0 MPa, a temperature of 135 °C, and a lamination time of 15 minutes, followed by cooling to room temperature. S5 Post-treatment: Trim the edges with a numerical control panel saw, polish with a 400-mesh sander, with surface roughness Ra ≤ 1.6 μm, grade and pack to obtain the finished product of the fragrance and antibacterial ecological board.

[0055] Example 4

[0056] S1 Substrate treatment: Select plywood as the substrate, and sand it successively with 120-mesh, 180-mesh, and 240-mesh abrasive belts using a thickness planer sander, controlling the substrate thickness error ≤ 0.15 mm, surface roughness Ra ≤ 5 μm, and moisture content of 8%. S2 Functional Adhesive Solution Preparation: Mix the formaldehyde decomposition active ingredient (nano-titanium dioxide) with a mass ratio of 5% and melamine formaldehyde resin, stir evenly, then add 1.5% of the fragrance microcapsule emulsion (50% sandalwood essential oil, 20% agarwood essential oil, 20% borneol essential oil, 10% pepper essential oil) and 75 ppm nano-silver / silicon wafer suspension, stir at low speed for 10 minutes, and finally add 0.1% curing agent, 0.1% penetrant and 0.01% mold release agent, and perform ultrasonic dispersion treatment for 5 minutes, with a frequency of 30 kHz and a power of 100 W; S3 Decorative Film Preparation: Select decorative base paper with a fixed weight of 80 g / m² and a moisture content of 8%, and successively perform primary dipping (amino resin adhesive solution, dipping amount 60%), primary drying (80 °C, wind speed 3 m / s), secondary dipping (functional adhesive solution, dipping amount 60%), and secondary drying and curing (infrared radiation, wavelength 2.5 μm, temperature 100 °C, time 5 minutes); S4 Laminating and Pressing: Adopt single-layer decorative film for step-by-step lamination, with a pressure of 0.5 MPa, a temperature of 110 °C, and a lamination time of 6 minutes. After cooling and shaping, turn it over and laminate the other side, and finally form a laminate with the particleboard core layer and cold press and fix it, and then perform hot pressing again; S5 Post-treatment: Trim the edges with a numerical control panel saw, polish with a 240-mesh sander, with a surface roughness Ra ≤ 1.6 μm, grade and pack to obtain the finished product of the fragrance and antibacterial ecological board.

[0057] Comparative Example 1 S1 Substrate Treatment: Select medium density fiberboard, without sanding treatment, and directly use it for subsequent processes; S2 Functional Adhesive Solution Preparation: Only use ordinary urea formaldehyde resin, without adding formaldehyde decomposition components and fragrance microcapsules; S3 Decorative Film Preparation: Ordinary decorative paper is impregnated with urea formaldehyde resin adhesive solution and dried and cured once; S4 Laminating and Pressing: Single-layer decorative film lamination, with a pressure of 0.6 MPa, a temperature of 120 °C, and a time of 10 minutes; S5 Post-treatment: The same as Example 1 to obtain the finished product of the ecological board.

[0058] Comparative Example 2 S1 Substrate Treatment: The same as Example 1; S2 Functional Adhesive Solution Preparation: Without adding nano-silver and nano-silicon wafers, only use the formaldehyde decomposition active ingredient and ordinary urea formaldehyde resin, and directly add fragrance essential oil; S3 Decorative Film Preparation: The same as Example 1; S4 Laminating and Pressing: Double-layer decorative film synchronous lamination, but without the cooling and shaping step; S5 Post-treatment: The same as Example 1 to obtain the finished product of the fragrance ecological board.

[0059] Comparative Example 3 S1 Substrate treatment: The same as in Example 2; S2 Preparation of functional adhesive solution: Mix the formaldehyde decomposition active ingredient (nano-titanium dioxide) with a mass ratio of 7% and melamine formaldehyde resin, stir evenly, then add a 100 ppm nano-silver / silicon wafer suspension, and mix only by mechanical stirring without using ultrasonic dispersion and nitrogen protection, and no fragrance microcapsules are added; S3 Preparation of decorative film: The same as in Example 1; S4 Lamination: The same as in Example 2; S5 Post-treatment: The same as in Example 1 to obtain the finished antibacterial ecological board.

[0060] Performance testing Perform performance testing on the finished fragrance antibacterial ecological boards prepared in Examples 1-4 and the finished ecological boards prepared in Comparative Examples 1-3, including functional performance testing, physical performance testing, chemical performance testing, environmental protection performance testing, and user experience testing.

[0061] 1. Functional performance detection 1.1 Detection of fragrance release performance Detection method: Evaluate the slow-release effect and aroma persistence of the fragrance microcapsules. Under standard environmental conditions (temperature 25°C, humidity 50%), regularly use a gas chromatography-mass spectrometry (GC-MS) instrument to detect the fragrance concentration released by the board, and record the fragrance release cycle.

[0062] 1.2 Detection of antibacterial performance Detection method: Evaluate the antibacterial effect of the board against common pathogens Escherichia coli and Staphylococcus aureus. Using the minimum inhibitory concentration test method, contact the board sample with the bacterial solution, observe the colony growth after culturing for 24 hours, and calculate the antibacterial rate.

[0063] 1.3 Detection of formaldehyde purification performance Detection method: Evaluate the decomposition and purification ability of the board for formaldehyde. Release a certain amount of formaldehyde in a closed environment, put in the board sample, regularly use a formaldehyde detector to detect the change in formaldehyde concentration, and calculate the formaldehyde purification efficiency within 24 hours.

[0064] 2. Physical performance detection 2.1 Detection of surface hardness Detection method: Evaluate the wear resistance and scratch resistance of the board surface. Use a Taber abrasion tester to apply a standard pressure to the board surface, and record the hardness grade and abrasion revolutions.

[0065] 2.2 Detection of dimensional stability Detection method: Evaluate the dimensional changes of the board under different environmental conditions. Place the board samples in high temperature (80°C), high humidity (95% relative humidity), and low temperature (-20°C) environments for 24 hours respectively, and measure the dimensional change rate.

[0066] 2.3 Warping deformation detection Detection method: Evaluate the warping condition of the board during hot pressing and use. Measure the warping rate of the board under standard environmental conditions.

[0067] 3. Chemical property detection 3.1 Formaldehyde emission detection Detection method: Ensure that the formaldehyde emission of the board meets the environmental protection standards. Use the climate chamber method to detect the formaldehyde emission of the board under specific conditions.

[0068] 3.2 Hazardous substance detection Detection method: Ensure that the board does not contain harmful chemical substances. Use gas chromatography-mass spectrometry (GC-MS) to detect harmful substances such as heavy metals (lead, mercury) and volatile organic compounds (VOCs) in the board, and ensure that all detection items meet national and international environmental protection standards.

[0069] 4. Environmental protection property detection 4.1 Detergent tolerance detection Detection method: Use a neutral detergent solution containing surfactant (5% concentration), wipe the board surface with a constant pressure of 2N and 100 wiping times along an "S" - shaped path, test the wear resistance and antibacterial property of the functional layer, and record the function retention rate.

[0070] 4.2 Moisture-proof property detection Detection method: Evaluate the moisture-proof property of the board in a humid environment. Immerse the board samples in water for 24 hours and measure the water absorption rate.

[0071] 5. User experience detection 5.1 Odor acceptance detection Detection method: Evaluate the user's acceptance of the fragrance odor. Organize users to conduct odor tests and record the user's satisfaction with the fragrance odor.

[0072] 5.2 Durability detection Detection method: Evaluate the performance changes of the board during long-term use. Place the board samples in a simulated actual use environment for 6 months, regularly detect their fragrance release, antibacterial, and formaldehyde purification functions, and record the product function performance retention rate.

[0073] 6. Detection results Table 1 Summary of performance detection results of each group of ecological board samples

[0074] Result analysis: The moisture content of the finished products in Examples 1-4 was controlled within a reasonable range of 8%-10%, meeting the environmental protection and quality standards of the finished ecological board; the moisture content of the finished product in Comparative Example 1 was on the high side (12%), and the moisture content of the finished products in Comparative Examples 2 and 3 was within a reasonable range (9%-10%).

[0075] The fragrance release period of Examples 1-4 was 8-12 months, indicating that the microcapsule technology achieved long-term slow release of fragrance components; Comparative Examples 1 and 3 had no fragrance function, indicating that the lack of fragrance microcapsules or related processes led to the loss of fragrance function; the fragrance release period of Comparative Example 2 was only 2 months, indicating that the direct addition of fragrance essential oil led to the rapid volatilization of the essential oil and could not achieve long-term release; it shows that the microcapsule technology adopted in the examples of the present invention significantly extended the fragrance release period and solved the problem that the antibacterial rates of Examples 1-4 against Escherichia coli and Staphylococcus aureus were both ≥99.5%, indicating that the synergistic effect of nano silver and nano silicon wafers significantly improved the antibacterial effect; the antibacterial rate of Comparative Example 1 was only 15%, indicating that ordinary urea-formaldehyde resin without antibacterial components could not provide effective antibacterial function; the antibacterial rate of Comparative Example 2 was 60%-65%, indicating that ordinary urea-formaldehyde resin without nano silver and nano silicon wafers had limited antibacterial effect; the antibacterial rate of Comparative Example 3 was 75%-98%, although it had a certain antibacterial effect, but without adding fragrance microcapsules and without using ultrasonic dispersion and nitrogen protection, resulting in slightly lower antibacterial performance than the examples; it shows that the synergistic effect of nano silver and nano silicon wafers in the examples of the present invention significantly improved the antibacterial performance, far exceeding the comparative examples.

[0076] The formaldehyde purification efficiency of Examples 1-4 was 88%-95%, indicating that the synergistic effect of nano titanium dioxide, bioenzyme and amino resin effectively decomposed formaldehyde; the formaldehyde purification efficiency of Comparative Example 1 was only 5%, indicating that ordinary urea-formaldehyde resin could not effectively decompose formaldehyde; Comparative Example 3: The formaldehyde purification efficiency was 85%, although it had a certain effect, but without adding fragrance microcapsules and without using optimized processes, resulting in slightly lower efficiency than the examples. It shows that the formaldehyde decomposition active ingredients and process optimization in the examples of the present invention significantly improved the formaldehyde purification efficiency.

[0077] The surface hardness of Examples 1-4 reached H / 2H, and the abrasion resistance revolutions were ≥1100 times, indicating that sanding treatment and dense functional layer significantly improved the abrasion resistance and scratch resistance of the board; the surface hardness of Comparative Example 1 was only B level, and the abrasion resistance revolutions were 500 times, indicating that the lack of sanding treatment and functional layer optimization led to poor physical properties; it shows that the substrate sanding and functional layer optimization in the examples of the present invention significantly improved the physical properties.

[0078] The dimensional change rate of Examples 1-4 is ≤0.2%, and the warpage curvature is ≤0.5 mm / m, indicating that the process of combining hot and cold pressing with cooling and shaping effectively reduces internal stress; the dimensional change rate of Comparative Example 1 is 0.8%, and the warpage curvature is as high as 2.0 mm / m, indicating that the lack of sanding treatment and cooling and shaping leads to poor dimensional stability; it shows that the step-by-step pressing and cooling and shaping process in the embodiments of the present invention ensures dimensional stability.

[0079] The formaldehyde emission of Examples 1-4 is ≤0.4 mg / L (E0 level), indicating that the low-temperature process and the use of amino resins effectively reduce the release of free formaldehyde; the formaldehyde emission of Comparative Example 1 is as high as 1.8 mg / L, indicating that the high-temperature processing of ordinary urea-formaldehyde resins results in excessive formaldehyde emission; it shows that the low-temperature process and the selection of green materials in the embodiments of the present invention significantly reduce the formaldehyde emission.

[0080] The VOCs emission of Examples 1-4 is ≤150 μg / m³, indicating that the process of no heavy metal addition and nitrogen protection effectively inhibits the release of VOCs; the VOCs emission of Comparative Example 1 is 450 μg / m³, and the lead and mercury contents exceed the standard, indicating that ordinary urea-formaldehyde resins and high-temperature processing introduce more harmful substances; the VOCs emission of Comparative Example 2 is 300 μg / m³, and the direct addition of essential oils results in a relatively high VOCs emission; it shows that the selection of green raw materials and process optimization in the embodiments of the present invention significantly improve the environmental performance.

[0081] The odor acceptance of Examples 1-4 is ≥90%, indicating that the microencapsulation and slow-release technology of natural essential oils makes the fragrance mild and lasting; the odor acceptance of Comparative Example 2 is only 50%, and the direct addition of essential oils results in an overly strong or short-lived odor; the odor acceptance of Comparative Example 3 is 30%, and the lack of fragrance microcapsules leads to a poor user experience; it shows that the fragrance function in the embodiments of the present invention significantly improves user satisfaction.

[0082] The function retention rate of Examples 1-4 after cleaning and wiping is ≥93%, and the function retention rate after 6 months is ≥85%. The cleaning agent tolerance is good, and the function retention rate is high, indicating that the microcapsule anti-permeability and the stability of the functional layer are excellent; Comparative Example 1 has no fragrance and antibacterial functional layer, and its function is physical performance. The function retention rate after cleaning and wiping is only 20%, and the long-term function retention rate is only 10%, indicating that the ordinary process leads to easy damage of the functional layer; it shows that the optimization of the functional layer in the embodiments of the present invention ensures the long-term effectiveness of the function.

[0083] Examples 1-4 perform excellently in terms of fragrance release cycle, antibacterial performance, formaldehyde purification efficiency, physical performance, environmental performance and user experience, while the performance indicators of the comparative examples are significantly reduced due to the lack of key process steps or functional components. This verifies the necessity and innovation of the process of the present invention and provides strong support for the development of high-performance green building materials.

[0084] The present invention provides a production process for a fragrance and antibacterial ecological board. By combining natural fragrance essential oil with nano antibacterial materials through microcapsule technology, the board is endowed with long-lasting fragrance and high-efficiency antibacterial functions. At the same time, the control of the moisture content of the base material and the process of the adhesive film paper are optimized to improve the product stability, environmental protection and health, and it is suitable for high-quality home environments.

Claims

1. A production process of a fragrance antibacterial ecological board, characterized in that: The specific steps include: S1 Substrate treatment: Sand the substrate to ensure that the thickness and surface finish of the substrate after sanding do not exceed 0.15mm, and the moisture content does not exceed 10%; S2 functional glue preparation: 5-10% by weight of formaldehyde decomposition active ingredients, 1.5-3% of fragrance microcapsule emulsion, 75-150ppm of nano silver and nano silicon wafers and amino resin are mixed and stirred at 20-35°C to prepare functional glue; S3 Decorative film preparation: Decorative film paper is sequentially impregnated with amino resin glue and fragrance antibacterial and formaldehyde decomposition functional glue, and then heated and dried to prepare a fragrance antibacterial functional decorative film paper; S4 Assembly and pressing: single-layer or double-layer decorative film is used to assemble the base material. The pressing process parameters are pressure 0.5-1.0Mpa, temperature 110-135℃, and time 6-15min to ensure the bonding of the film and the base material. S5 post-processing: trim the edges of the pressed boards, grade them according to quality standards and pack them to produce the finished fragrance antibacterial ecological boards.

2. The production process of the fragrance antibacterial ecological board according to claim 1 is characterized in that: The substrate treatment specifically comprises the following steps: S1.1 Material selection: Choose plywood, particleboard, MDF or blockboard as the base material; S1.2 Sanding: Use 120 mesh, 180 mesh, and 240 mesh sanding belts in sequence through a fixed thickness sanding machine to control the surface roughness Ra ≤ 5μm and the thickness error ≤ 0.15mm to ensure the flatness and adaptability of the substrate; S1.3 Laminating: Use two-component polyurethane adhesive to hot-press the surface of the substrate with an error of more than 0.15mm with poplar veneer or reconstructed decorative veneer with a thickness of 0.3-1.0mm and a moisture content of ≤12%. The process parameters are 110-130℃, 0.8-1.2MPa, and 30-60s. After laminating, the moisture content of the substrate is ≤10% to avoid the risk of cracking.

3. The production process of the fragrance antibacterial ecological board according to claim 1 is characterized in that: The functional glue preparation specifically comprises the following steps: S2.1 Preparation of formaldehyde decomposition glue: Mix 5-10% by weight of formaldehyde decomposition active ingredients with amino resin, and stir mechanically at a speed of 300-500 rpm for 5-10 minutes until the glue is uniform and free of particles; S2.2 Addition of fragrance antibacterial ingredients: add 1.5-3% fragrance microcapsule emulsion, 75-150ppm nanosilver and nanosilicon wafers to the above glue solution in sequence, and stir at a low speed of 100-200rpm for 10-15 minutes to prevent the microcapsules from breaking; S2.3 Mixing of auxiliary additives: Add 0.1-0.3% curing agent, 0.1-0.2% penetrant, and 0.01-0.1% release agent in proportion, and after mixing, use an ultrasonic disperser with a frequency of 30-50kHz and a power of 100-300W for 5-10 minutes, and simultaneously use nitrogen protection to ensure that the ingredients are evenly dispersed to obtain a fragrance-inhibiting and formaldehyde-decomposing functional glue.

4. The production process of the fragrance antibacterial ecological board according to claim 3 is characterized in that: The functional glue preparation specifically includes: the formaldehyde decomposition effective ingredient accounts for 5-10% of the glue mass, the amino resin is melamine formaldehyde resin or melamine modified urea formaldehyde resin; the fragrance microcapsule emulsion in the functional glue includes: an oil phase composed of fragrance additives of sandalwood, agarwood, camphor, and pepper essential oils accounting for 50-70%, 10-20%, 10-20%, and 5-10% by mass, and isophorone diisocyanate in a mass ratio of 1-3:1, and a gum arabic water phase accounting for 50-70% by mass, and the three are subjected to high-pressure homogenization emulsification and thermal reaction to form a microcapsule system to achieve sustained release and stable loading of fragrance components; the nanosilver and silicon wafers are pre-dispersed in deionized water to prepare a nanosilver / silicon wafer suspension with a concentration of 1-2% and then added to avoid agglomeration; the reaction temperature of the functional glue preparation is controlled at 20-35°C throughout the process.

5. The production process of the fragrance antibacterial ecological board according to claim 1 is characterized in that: The preparation of the decorative film paper specifically comprises the following steps: S3.1 Decorative paper pretreatment: Select decorative base paper or printed paper, and after coding and marking, use electrostatic dust removal equipment to remove surface impurities; S3.2 One-time dipping: Dip the decorative film paper into the amino resin glue at a speed of 20-40m / min, and control the dipping amount to 60%-90%. After dipping, the paper surface is evenly covered with glue; S3.3 One-time drying and pre-curing: hot air circulation drying, paper feeding speed 20-40m / min, pre-curing degree 30%-70%, volatile matter reduced to 8%-12%; S3.4 Secondary dipping: Dip the dried decorative paper into a fragrance antibacterial and formaldehyde decomposition functional glue containing 1.5%-3% fragrance microcapsule emulsion and 75-150ppm nanosilver / silicon wafer to ensure uniform loading of functional components; S3.5 Secondary drying and curing: Secondary drying is carried out by infrared radiation for 5-8 minutes to completely cure the adhesive liquid and form a dense fragrance antibacterial and formaldehyde purification functional layer, which is then cut to the target size to obtain fragrance antibacterial functional decorative adhesive film paper.

6. The production process of the fragrance antibacterial ecological board according to claim 1 is characterized in that: The assembly pressing includes two methods: S4.1 single-layer decorative film step-by-step pressing and S4.2 double-layer decorative film synchronous pressing.

7. The production process of the fragrance antibacterial ecological board according to claim 6 is characterized in that: The step-by-step lamination of the single-layer decorative film specifically comprises the following steps: S4.1-1 Single-side pressing: Place the single-layer fragrance antibacterial decorative film paper with the functional surface facing outward and aligned with the substrate, send it into the hot press, press it for 6-12 minutes at 0.5-1.0MPa and 110-130℃ to achieve the initial bonding of the film and the substrate; S4.1-2 Cooling and shaping: After lamination, the board is cooled to below 40℃, with volatile matter ≤5%, to eliminate internal stress and stabilize the adhesive layer structure; S4.1-3 Pressing on the other side: Turn over the substrate, repeat the pressing operation on one side and press the decorative film on the other side, with a thickness deviation of ≤0.1mm to ensure double-sided symmetry; S4.1-4 Substrate assembly: Assemble the fragrance antibacterial decorative film paper with the functional side facing outwards and the single-sided pressed substrate. The assembled board is hot pressed again at 0.5-1.0MPa and 110-130℃ for 6-12 minutes. The density deviation of particleboard and MDF substrate is ≤3% to ensure the density of the overall structure.

8. The production process of the fragrance antibacterial ecological board according to claim 6 is characterized in that: The synchronous pressing of the double-layer decorative film specifically comprises the following steps: S4.2-1 Assembly configuration: Place the double-layer fragrance antibacterial decorative film paper with its functional surface facing outward on the upper and lower surfaces of the substrate respectively, and use plywood, particle board, MDF or honeycomb board as the middle sandwich layer material to form a sandwich structure of decorative film-substrate-decorative film; S4.2-2 Synchronous hot pressing: directly send it into a multi-layer hot press, press it for 8-15 minutes at a pressure of 0.5-1.0MPa and a temperature of 115-135℃, and the curing degree of the adhesive layer is ≥95%, so as to achieve a one-time lamination of the double-sided decorative film paper and the substrate; S4.2-3 Cooling and stabilization: After lamination, the board is slowly cooled to room temperature through an air cooling system, and the moisture content is controlled to ≤10% to avoid warping and deformation.

9. The production process of the fragrance antibacterial ecological board according to claim 1, characterized in that: The post-processing specifically comprises the following steps: S5.1 Edge trimming: Use CNC panel saw to trim the four sides of the laminated board to remove burrs and overflow glue, ensure that the size meets the requirements, and the edge verticality error is ≤0.5mm / m; S5.2 Grading and packaging: According to the quality standards, the boards are sorted into superior products, first-class products, and qualified products. After packaging, the finished products of fragrance antibacterial ecological boards are obtained.

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