Antibacterial and mildew-proof officinal magnolia bark shaving board and preparation method thereof
By using magnolia wood shavings and melamine-modified urea-formaldehyde resin adhesive in particleboard, a multi-layered antibacterial and mildew-resistant particleboard was prepared, which solved the problem of particleboard being prone to mold and bacterial growth in humid environments, improved the overall performance and environmental friendliness of particleboard, and broadened its application scenarios.
Patent Information
- Application Number
- CN202610274727.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-09
- Publication Date
- 2026-05-15
AI Technical Summary
Existing particleboard is prone to mold and bacterial growth in humid environments and has an odor, affecting indoor environmental quality. In addition, existing adhesives are not environmentally friendly.
Using magnolia wood shavings as the raw material for the surface and core layers, combined with melamine-modified urea-formaldehyde resin adhesive, a multi-layered antibacterial and mildew-resistant particleboard is prepared. The protective layer is formed by utilizing the natural antibacterial and mildew-resistant properties of magnolia wood and the high bonding strength of the modified adhesive.
It achieves antibacterial and anti-mildew properties for particleboard in humid environments, reduces formaldehyde emissions, improves the overall performance and environmental friendliness of particleboard, broadens application scenarios, and conforms to the development trend of health and environmental protection.
Smart Images
Figure CN122034104A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wood processing technology, specifically to an antibacterial and mildew-resistant thick wood particleboard and its preparation method. Background Technology
[0002] Particleboard, also known as chipboard, chipboard, or bagasse board, is a type of engineered wood product made from wood chips or other lignocellulosic materials bonded together with adhesives under heat and pressure. Particleboard production is energy-efficient and low-cost, with less stringent requirements on the quality of raw wood materials. It possesses good physical and mechanical properties and is widely used in the furniture, decoration, and building materials industries. In recent years, China has become the world's third-largest producer of particleboard, after the United States and Germany.
[0003] Particleboard has a relatively uniform structure and good processing performance, allowing it to be processed into large-format boards as needed, making it a good raw material for making furniture of different sizes and styles. Finished particleboard does not require further drying and can be used directly, offering good sound absorption and insulation properties. However, it also has inherent drawbacks. Due to its rough edges, it easily absorbs moisture. Furthermore, due to the nature of wood and the adhesives used, current particleboard technology is not mold-resistant and antibacterial, making it prone to mold and bacterial growth in humid environments. Additionally, due to the adhesives used, this type of particleboard often has some degree of odor, all of which negatively impact the quality of the indoor environment and are not environmentally friendly.
[0004] Magnolia officinalis wood is straight, uniform, lightweight, and tough, with a fine grain and few cracks. It is a medium-density broadleaf timber with high bending strength and good processing properties. It is suitable for industrial use in pulp and paper making, fiberboard, and plywood production, as well as for building structural materials and furniture manufacturing, making it a versatile tree species. The bark, root bark, flowers, and seeds of Magnolia officinalis all have medicinal value. Its main active components include lignans (such as honokiol and magnolol), volatile oils (containing eucalyptol and eugenol), and alkaloids. Honokiol and magnolol account for more than 50% of the total components, giving it anti-inflammatory, antibacterial, and antioxidant pharmacological effects. Summary of the Invention
[0005] To alleviate or partially alleviate the above-mentioned technical problems, the solution of the present invention is as follows:
[0006] An antibacterial and mildew-resistant mahogany particleboard comprises, from top to bottom, an upper surface layer, a core layer, and a lower surface layer. The upper and lower surface layers are made of mahogany shavings and adhesives, and the core layer is made of wood shavings and adhesives.
[0007] In the environmentally friendly antibacterial particleboard of this invention, magnolia wood shavings are used in combination with ordinary wood shaving units to obtain a high-strength particleboard. Melamine-modified urea-formaldehyde resin adhesive is used to prepare the particleboard, which has the advantages of high bonding strength, strong mildew resistance, good antibacterial properties, low glue application, and good environmental performance. Laying magnolia wood shavings on the surface of the particleboard endows it with environmentally friendly antibacterial and mildew-proof functions.
[0008] Wood shavings are selected from at least one of poplar wood shavings or pine wood shavings.
[0009] Using pure poplar or pine shavings as the core layer fully utilizes the material properties of poplar and pine, ensuring the basic strength and stability of the particleboard. The thick layer of pine shavings added to the surface forms a protective layer with antibacterial and anti-mildew properties. This multi-layered structural design allows the particleboard to possess good physical properties while also adding special antibacterial, antifungal, and anti-mildew functions, thus enhancing the overall performance of the product.
[0010] Preferably, the adhesive is melamine-modified urea-formaldehyde resin adhesive.
[0011] Preferably, the weight ratio of magnolia wood shavings in the upper and lower surface layers to the weight ratio of the adhesive is 20:(1-2); the weight ratio of wood shavings in the core layer to the weight ratio of the adhesive is 20:(1-2).
[0012] The weight ratio of the top layer of magnolia wood shavings, the core layer of wood shavings, and the bottom layer of magnolia wood shavings is 3:7:3.
[0013] This solution also provides a method for preparing the aforementioned antibacterial and mildew-resistant thick mulch particleboard, including the following steps:
[0014] S1. The raw material of Magnolia officinalis used for the upper and lower surface layers is chipped, shaving, sieved, dried, and then glued to obtain fine Magnolia officinalis wood shavings; the wood used for the core layer is chipped, shaving, sieved, dried, and then glued to obtain fine wood shavings.
[0015] S2. First, lay the lower surface layer with fine wood shavings, then lay the core layer with fine wood shavings, and then lay the upper surface layer with fine wood shavings to make the paved board blank.
[0016] S3. The paving board blank is pre-pressed and hot-pressed, cooled, and trimmed to form a board.
[0017] Preferably, the inlet temperature of the dryer in step S1 is controlled at 200-210°C, the outlet temperature of the dryer is controlled at 100-110°C, and the moisture content of the wood shavings after drying is 3%-5%.
[0018] Preferably, the hot pressing pressure is 2-4 MPa and the hot pressing temperature is 160-200℃.
[0019] Preferably, the pre-compression pressure is 1.5-1.8 MPa.
[0020] The technical solution of this invention has one or more of the following beneficial technical effects:
[0021] (1) The functional antibacterial and mildew-proof particleboard of the present invention has physical and chemical properties such as static bending strength, elastic modulus, 24h water absorption thickness expansion rate, screw holding force, and formaldehyde release that meet the requirements of national standards. It has advantages such as high strength, good water resistance, and low formaldehyde release, and also has functional advantages such as antibacterial and mildew-proof properties. The performance indicators of the particleboard fully meet the requirements of furniture-type particleboard for use in humid conditions as specified in GB / T4897-2015 "Particleboard".
[0022] (2) In the functional antibacterial and mildew-resistant particleboard of the present invention, melamine-modified urea-formaldehyde resin adhesive is used as the adhesive, which significantly improves the bonding performance and water resistance compared with existing urea-formaldehyde resin adhesives. Combined with Magnolia officinalis extract and Magnolia officinalis wood shavings, and with optimized preparation process, a composite particleboard is prepared, which retains magnolol, eugenol and various alkaloid components, giving the particleboard multiple functions such as mildew prevention and antibacterial properties. It not only effectively solves the problem of easy mold growth of particleboard in humid environments, but also adds functionalities such as health care and age-friendly features that ordinary particleboard does not have. The overall performance meets the standard requirements.
[0023] (3) The environmentally friendly, antibacterial, and mildew-resistant magnolia wood particleboard of the present invention has certain special medicinal value. The magnolol and eugenol contained in the board will gradually volatilize over time, which endows it with certain environmental protection, antibacterial, and medicinal functions. The magnolia wood contains active ingredients such as lignans, which are retained in the particleboard. The magnolol exhibits significant antioxidant capacity, the mechanism of which lies in reducing the concentration of calcium ions in cells, thereby playing an important role in dilating the cardiovascular system and protecting the cardiovascular system. The test results show that the board has met the requirements of the Grade 2 odor standard and has certain therapeutic functions. This characteristic further enriches the original functions of artificial boards. This not only broadens the application scenarios of particleboard, but also creates a new track and new way of using boards. This provides strong support for the reuse of forestry processing residues and resources, and significantly extends the industrial chain of the magnolia industry, with broad market prospects and practical value.
[0024] Furthermore, other beneficial effects of the present invention will be mentioned in the specific embodiments. Attached Figure Description
[0025] Figure 1 This is a structural diagram of antibacterial and mildew-resistant thick wood particleboard.
[0026] Explanation of reference numerals in the attached diagram: 1. Upper surface layer; 2. Core layer; 3. Lower surface layer. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0028] An antibacterial and mildew-resistant magnolia wood particleboard comprises, from top to bottom, an upper surface layer 1, a core layer 2, and a lower surface layer 3. The upper surface layer 1 and the lower surface layer 3 are made of magnolia wood shavings and adhesives, and the core layer 2 is made of wood shavings and adhesives.
[0029] The wood shavings are selected from at least one of poplar or pine wood shavings; the adhesive is melamine-modified urea-formaldehyde resin. The weight ratio of the magnolia shavings in the upper surface layer 1 and the lower surface layer 3 to the adhesive is 20:(1-2); the weight ratio of the wood shavings in the core layer 2 to the adhesive is 20:(1-2). The weight ratio of the magnolia shavings in the upper surface layer 1 to the wood shavings in the core layer 2 and the magnolia shavings in the lower surface layer is 3:7:3.
[0030] A method for preparing antibacterial and mildew-resistant magnolia wood particleboard includes the following steps:
[0031] S1. The magnolia wood raw material used for the upper surface layer 1 and the lower surface layer 3 is chipped, shaving, sieved, dried, and then glued to obtain magnolia wood shavings; the wood material used for the core layer 2 is chipped, shaving, sieved, dried, and then glued to obtain wood shavings.
[0032] The inlet temperature of the dryer is controlled at 200-210℃, and the outlet temperature is controlled at 100-110℃. The moisture content of the wood shavings after drying is 3%-5%.
[0033] S2. First, lay the lower surface layer 3 with fine wood shavings, then lay the core layer 2 with fine wood shavings, and then lay the upper surface layer 1 with fine wood shavings to obtain the paved board blank.
[0034] S3. The paving board blank is pre-pressed and hot-pressed, cooled, and trimmed to form a board.
[0035] The pre-compression pressure is 1.5-1.8 MPa, the hot-compression pressure is 2-4 MPa, and the hot-compression temperature is 160-200℃.
[0036] The following describes embodiments of this application. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in this field or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.
[0037] Example 1
[0038] The surface layer material uses small-diameter thick mahogany, branches, and processing residues; the core layer 2 material uses poplar; wood shavings are obtained through chipping and planing. The wood shavings are manually sieved through an 8-mesh sieve and then dried in a dryer. The inlet temperature of the dryer is controlled at 200℃ and the outlet temperature is controlled at 100℃. The moisture content of the dried wood shavings is 5%.
[0039] Dry magnolia wood shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine magnolia wood shavings. The weight ratio of the magnolia wood shavings to the adhesive is 10:1. Dry poplar wood shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine wood shavings. The weight ratio of the wood shavings to the adhesive is 10:1.
[0040] First, the lower surface layer 3 is laid with fine magnolia shavings, then the core layer 2 is laid with fine wood shavings, and then the upper surface layer 1 is laid with fine magnolia shavings to obtain the paving board blank; wherein the weight ratio of magnolia shavings in the upper surface layer 1, the wood shavings in the core layer 2, and the magnolia shavings in the lower surface layer 3 is 3:7:3, thus obtaining the paving board blank with a gradient structure.
[0041] The paving board blank is pre-pressed at 1.5MPa, and then hot-pressed at 160℃ for 50s / mm and 2MPa to produce particleboard. After cooling, the edges are trimmed to produce the board material.
[0042] Example 2
[0043] The surface layer material uses small-diameter thick mahogany, branches, and processing residues; the core layer 2 material uses pine; wood shavings are obtained through chipping and planing. The wood shavings are manually sieved through an 8-mesh sieve and then dried in a dryer. The inlet temperature of the dryer is controlled at 210℃ and the outlet temperature is controlled at 110℃. The moisture content of the dried wood shavings is 3%.
[0044] Dry magnolia wood shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine magnolia wood shavings. The weight ratio of magnolia wood shavings to the adhesive is 20:1. Dry pine wood shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine wood shavings. The weight ratio of wood shavings to the adhesive is 20:1.
[0045] First, the lower surface layer 3 is laid with fine magnolia shavings, then the core layer 2 is laid with fine wood shavings, and then the upper surface layer 1 is laid with fine magnolia shavings to obtain the paving board blank; wherein the weight ratio of magnolia shavings in the upper surface layer 1, the wood shavings in the core layer 2, and the magnolia shavings in the lower surface layer 3 is 3:7:3, thus obtaining the paving board blank with a gradient structure.
[0046] The paving board blank is pre-pressed at 1.8 MPa, and then hot-pressed at 200℃ for 50 s / mm and 4 MPa to produce particleboard. After cooling and trimming, it is made into a board.
[0047] Example 3
[0048] The surface layer material uses small-diameter mahogany, branches, and processing residues; the core layer 2 material uses pine; wood shavings are obtained through chipping and planing. The wood shavings are manually sieved through an 8-mesh sieve and then dried in a dryer. The inlet temperature of the dryer is controlled at 205℃ and the outlet temperature is controlled at 105℃. The moisture content of the dried wood shavings is 3%.
[0049] Dry magnolia shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine magnolia shavings. The weight ratio of magnolia shavings to the adhesive is 20:1.5. Dry pine shavings are added to a glue mixer, then melamine-modified urea-formaldehyde resin is sprayed on, and the mixture is stirred evenly to obtain fine wood shavings. The weight ratio of wood shavings to the adhesive is 20:1.5.
[0050] First, the lower surface layer 3 is laid with fine magnolia shavings, then the core layer 2 is laid with fine wood shavings, and then the upper surface layer 1 is laid with fine magnolia shavings to obtain the paving board blank; wherein the weight ratio of magnolia shavings in the upper surface layer 1, the wood shavings in the core layer 2, and the magnolia shavings in the lower surface layer 3 is 3:7:3, thus obtaining the paving board blank with a gradient structure.
[0051] The paving board blank is pre-pressed at 1.6 MPa, and then hot-pressed at 180°C for 50 s / mm and 3 MPa to produce particleboard. After cooling, the edges are trimmed to produce the board material.
[0052] Comparative Example 1
[0053] The only difference between this comparative example and Example 1 is that poplar wood is used as the raw material for both the surface layer and the core layer 2, while the rest of the process is the same as in Example 1.
[0054] The physical and chemical properties of particleboard (internal bond strength, static bending strength, modulus of elasticity, 24h water absorption thickness expansion, screw holding force, formaldehyde release, and TVOC) were tested according to GB / T17657-1999 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels". The results are shown in Table 1.
[0055] Table 1
[0056]
[0057] As can be seen from the above measured physical and chemical performance indicators, the various physical and chemical performance indicators of the Houpu particleboard of the present invention meet the requirements of national standards, and most of the physical and chemical performance indicators (such as internal bond strength) are much higher than the national standards.
[0058] The antibacterial properties were tested according to LY / T 1926-2020 "Testing and Grading of Antibacterial Properties of Wood-based Panels and Wood (Bamboo) Products"; the results are shown in Table 2.
[0059] Table 2
[0060]
[0061] It is evident that Magnolia officinalis has significant in vitro antibacterial activity. Filter paper discs containing 100% Magnolia officinalis extract showed significant antibacterial activity against Staphylococcus aureus, Staphylococcus albus, Pseudomonas aeruginosa, Escherichia coli, Salmonella typhi, Streptococcus pyogenes, and Streptococcus beta-1.
[0062] The mold resistance was evaluated according to LY / T 2230-2013 "Evaluation of Mold Resistance Performance of Wood-based Panels". The grading results of mold growth on the surface of the wood-based panel specimens are shown in Table 3.
[0063] Table 3
[0064]
[0065] It is evident that the Magnolia officinalis particleboard in this solution possesses excellent antibacterial properties. Compared to some particleboards that use chemical antibacterial and antifungal agents, the new particleboard with added Magnolia officinalis shavings utilizes the antibacterial and antifungal characteristics of natural plants, reducing the use of chemical substances, better meeting environmental protection requirements, and contributing to the creation of a healthy and green indoor environment, thus aligning with the national health development trend of the new era.
[0066] To better illustrate the present invention, numerous specific details have been provided in the detailed embodiments described above. Those skilled in the art should understand that the present invention can be practiced even without certain specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of the present invention.
[0067] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.
Claims
1. An antibacterial and mildew-resistant thick particleboard, comprising, from top to bottom, an upper surface layer, a core layer, and a lower surface layer, characterized in that, The upper and lower surface layers are made of magnolia wood shavings and adhesives, and the core layer is made of wood shavings and adhesives.
2. The antibacterial and mildew-resistant thick particleboard according to claim 1, characterized in that, Wood shavings are selected from at least one of poplar wood shavings or pine wood shavings.
3. The antibacterial and mildew-resistant thick mulch particleboard according to claim 1, characterized in that, The adhesive is melamine-modified urea-formaldehyde resin adhesive.
4. The antibacterial and mildew-resistant thick particleboard according to claim 1, characterized in that, The weight ratio of magnolia wood shavings in the upper and lower surface layers to the adhesive is 20:(1-2); the weight ratio of wood shavings in the core layer to the adhesive is 20:(1-2).
5. The antibacterial and mildew-resistant thick mulch particleboard according to claim 1, characterized in that, The weight ratio of the top layer of magnolia wood shavings, the core layer of wood shavings, and the bottom layer of magnolia wood shavings is 3:7:
3.
6. A method for preparing an antibacterial and mildew-resistant thick mulch particleboard as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The raw material of Magnolia officinalis used for the upper and lower surface layers is chipped, shaving, sieved, dried, and then glued to obtain fine Magnolia officinalis wood shavings; the wood used for the core layer is chipped, shaving, sieved, dried, and then glued to obtain fine wood shavings. S2. First, lay the lower surface layer with fine wood shavings, then lay the core layer with fine wood shavings, and then lay the upper surface layer with fine wood shavings to make the paved board blank. S3. The paving board blank is pre-pressed and hot-pressed, cooled, and trimmed to form a board.
7. The method for preparing an antibacterial and mildew-resistant thick mulch particleboard as described in claim 6, characterized in that, In step S1, the inlet temperature of the dryer is controlled at 200-210°C, the outlet temperature is controlled at 100-110°C, and the moisture content of the dried wood shavings is 3%-5%.
8. The method for preparing an antibacterial and mildew-resistant thick mulch particleboard as described in claim 6, characterized in that, The hot pressing pressure is 2-4 MPa, and the hot pressing temperature is 160-200℃.
9. The method for preparing an antibacterial and mildew-resistant thick mulch particleboard as described in claim 6, characterized in that, The pre-compression pressure is 1.5-1.8 MPa.