Antibacterial and mildew-proof shaving board and preparation method thereof

Abstract

The invention relates to the technical field of shaving boards, and provides an antibacterial and mildewproof shaving board and a preparation method thereof.The antibacterial and mildewproof shaving board comprises a core layer and a surface layer, and the surface layer and the core layer are each independently prepared from, by weight, 75-85 parts of dry wood shavings, 15-18 parts of adhesive, 0.5-1 part of waterproof agent and 0.5-1 part of formaldehyde reducing agent; the core layer further comprises 0.5-1 part of a curing agent and 0.5-1 part of diphenylmethane diisocyanate; the adhesive is prepared from the following raw materials in parts by weight: 48 to 50 parts of formaldehyde aqueous solution, 43 to 45 parts of urea, 5 to 9 parts of melamine, 1 to 2 parts of p-guanidinobenzene hydrochloride, 1 to 2 parts of nano-zinc oxide and 1 to 2 parts of mildew preventive. By means of the technical scheme, the problems that in the related technology, the shaving board is insufficient in antibacterial activity and internal bonding strength are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shaving board, in particular, to an antibacterial and mildew-proof shaving board and a preparation method thereof. BACKGROUND

[0002] With the development of building decoration and furniture manufacturing field, the application of shaving board is more and more widely, however, the traditional shaving board is affected by the humidity and temperature of the use environment, and is easy to breed mold and bacteria, and then appears mildew, corrosion and other problems, which not only shortens the service life, but also may endanger human health; and the shaving board is difficult to meet the demand in the scene of furniture load-bearing parts, building decoration structure and other high load-bearing and stability requirements, which limits its application to some extent. Therefore, the industry puts forward higher requirements on the internal bonding strength and antibacterial and mildew-proof performance of the shaving board.

[0003] At present, the existing antibacterial and mildew-proof shaving board has many deficiencies, such as insufficient antibacterial and mildew-proof effect, and the antibacterial component is easy to fail after a period of use; therefore, it is urgent to develop a shaving board which can effectively resist bacteria and has excellent internal bonding strength. SUMMARY

[0004] The present application provides an antibacterial and mildew-proof shaving board and a preparation method thereof, which solves the problems of insufficient antibacterial property and internal bonding strength of the shaving board in the related art.

[0005] The technical scheme of the present application is as follows: The present application provides an antibacterial and mildew-proof shaving board, which comprises a core layer and a surface layer, and each of the surface layer and the core layer independently comprises the following components by weight: 75-85 parts of dry wood shaving, 15-18 parts of adhesive, 0.5-1 part of waterproof agent, 0.5-1 part of aldehyde reducing agent, 0.5-1 part of curing agent, and 0.5-1 part of diphenyl methane diisocyanate. The adhesive comprises the following components by weight: 48-50 parts of formaldehyde aqueous solution, 43-45 parts of urea, 5-9 parts of melamine, 1-2 parts of p-guanidino cyanide hydrochloride, 1-2 parts of nano zinc oxide, and 1-2 parts of mildew-proof agent.

[0006] As a further technical scheme, the preparation method of the adhesive comprises the following steps: A1, adding formaldehyde aqueous solution in a reaction kettle, adjusting the pH value to 7.5-8.0 with sodium hydroxide aqueous solution to obtain a premix; A2, after the premix is warmed to 40℃, 20% of the total mass of urea is added, and then the temperature is continuously raised to 50℃, and the reaction is kept for 30-40 min to obtain a first premix; A3, after adding formic acid aqueous solution to adjust the pH value of the first premixing solution to 5.0~5.5, adding urea with a total mass of 30% of urea, continuing to warm to 80℃, and keeping the temperature for 75~85min to obtain a second premixing solution; A4, adding sodium hydroxide aqueous solution to adjust the pH value of the second premixing solution to 8.0~8.5, reducing the temperature to 70℃, adding urea with a total mass of 50% of urea, keeping the temperature for 20~30min, and obtaining a third premixing solution through temperature reduction and dehydration; A5, adding a mildew-proof agent, p-guanidinobenzonitrile hydrochloride and nano zinc oxide into the third premixing solution and mixing uniformly, adding sodium hydroxide aqueous solution to adjust the pH value to 8.5~9.0, and reducing the temperature to obtain the adhesive.

[0007] As a further technical solution, in step A5, the mixing temperature is 35~40℃, and the mixing time is 15~25min.

[0008] As a further technical solution, the moisture content of the wood dry shavings is 2.0%~4.0% by mass fraction.

[0009] As a further technical solution, the curing agent is ammonium sulfate.

[0010] As a further technical solution, the water-proof agent includes polytrifluoropropyl methyl siloxane and sodium methyl silanol.

[0011] The wood-based panel of the present application adopts a polytrifluoropropyl methyl siloxane and sodium methyl silanol composite waterproof system, which significantly improves the water resistance of the wood-based panel through the dual action mechanism of physical coverage and chemical bonding. The polytrifluoropropyl methyl siloxane can form a dense and stable hydrophobic layer on the surface of the wood fibers and the glue film due to the low surface energy characteristics of the trifluoropropyl group in its molecule, effectively preventing the infiltration and penetration of liquid water. The silicon alcohol group of sodium methyl silanol can form hydrogen bonding force with the hydroxyl group on the surface of the wood fibers, forming a durable waterproof reinforcement, effectively inhibiting deformation and strength decay caused by moisture, thereby ensuring the bonding strength without affecting the waterproof ability of the wood-based panel.

[0012] As a further technical solution, the mass ratio of sodium methyl silanol and polytrifluoropropyl methyl siloxane is 7:3~4.

[0013] As a further technical solution, the mass ratio of the raw material of the core layer and the raw material of the surface layer is 13:7.

[0014] The present application also provides a preparation method of the antibacterial and mildew-proof wood-based panel, which is used for preparing the above-mentioned antibacterial and mildew-proof wood-based panel and includes the following steps: S1, after the raw materials of the core layer and the surface layer are mixed uniformly respectively, the pre-processed plate blank is obtained by pre-pressing after the core layer and the surface layer are laid in the order of from bottom to top; S2, the pre-processed plate blank is obtained by hot pressing; S3, the formed plate blank is obtained by edge cutting, cooling and sanding.

[0015] As a further technical solution, in step S2, the temperature of the hot pressing is 195-240 DEG C, the pressure of the hot pressing is 2.5-3 MPa, and the time of the hot pressing is 8-12 s.

[0016] The working principle and beneficial effects of the present application are as follows: The present application prepares an antibacterial and mildew-proof particle board. By adding p-guanidino benzonitrile hydrochloride and nano zinc oxide into the adhesive, the antibacterial property and internal bonding strength of the particle board are improved. The guanidino cation contained in the p-guanidino benzonitrile hydrochloride can be strongly adsorbed on the negatively charged bacterial cell membrane through electrostatic action, and the nano zinc oxide cooperates to improve the antibacterial property. In addition, the guanidino group in the p-guanidino benzonitrile hydrochloride molecule has strong polarity and reactivity, which can form hydrogen bond force with the hydroxyl group on the surface of the wood dry particle, and can also form hydrogen bond force with the hydroxyl group and amino group in the adhesive, effectively improving the interfacial bonding state of the adhesive between the wood dry particles, and reducing the gap between the adhesive layer and the wood dry particles together, playing a physical reinforcing role, and ensuring that the particle board does not easily delaminate and crack during long-term use. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor also fall within the scope of protection of the present application.

[0018] In the following examples and comparative examples: Sodium hydroxide aqueous solution is a 30wt% sodium hydroxide aqueous solution; Formic acid aqueous solution is an 85wt% formic acid aqueous solution; Formaldehyde aqueous solution is a 42wt% formaldehyde aqueous solution; Reduction aldehyde agent, manufacturer: Hebei Chuanlin Environmental Protection Technology Co., Ltd., model: P2; Mildew-proof agent, manufacturer: Zhaoqing Liheng Technology Development Co., Ltd., model: FM-01; Polytrifluoropropyl methyl siloxane, manufacturer: Zhengzhou Alpha Chemical Co., Ltd., molecular weight: 468.54; Nano zinc oxide, average particle size 20 nm.

[0019] Example 1 An antibacterial and mildew-proof shaving board, comprising a core layer and a surface layer, the surface layer comprising the following raw materials in parts by weight: 75 parts of wood dry shaving, 15 parts of adhesive, 0.5 parts of sodium methylsilanol, 0.5 parts of aldehyde reducing agent, the core layer comprising the following raw materials in parts by weight: 75 parts of wood dry shaving, 15 parts of adhesive, 0.5 parts of sodium methylsilanol, 0.5 parts of ammonium sulfate, 0.5 parts of diphenyl methane diisocyanate, 0.5 parts of aldehyde reducing agent; wherein the raw materials of the adhesive comprise the following components in parts by weight: 48 parts of formaldehyde aqueous solution, 43 parts of urea, 5 parts of melamine, 1 part of p-guanidino cyanide hydrochloride, 1 part of nano zinc oxide, and 1 part of mildew-proof agent; A preparation method of the adhesive, comprising the following steps: A1, adding formaldehyde aqueous solution in a reaction kettle, adjusting the pH value to 7.5 with sodium hydroxide aqueous solution to obtain a premix; A2, after the premix is warmed to 40℃, 20% of the total mass of urea is added, and then the temperature is continuously increased to 50℃, and the reaction is kept for 30 min to obtain a first premix; A3, after the first premix is added with formic acid aqueous solution to adjust the pH value to 5.0, 30% of the total mass of urea is added, and then the temperature is continuously increased to 80℃, and the reaction is kept for 75 min to obtain a second premix; A4, in the second premix, sodium hydroxide aqueous solution is added to adjust the pH value to 8.0, the temperature is decreased to 70℃, 50% of the total mass of urea is added, and the reaction is kept for 20 min, and then the temperature is decreased to 60℃, and dehydration is performed to 10% of the total amount of the raw materials to obtain a third premix; A5, in the third premix, the mildew-proof agent, p-guanidino cyanide hydrochloride and nano zinc oxide are mixed at 35℃ for 25 min, sodium hydroxide aqueous solution is added to adjust the pH value to 8.5, and the temperature is decreased to 30℃ to obtain the adhesive; A preparation method of an antibacterial and mildew-proof shaving board, comprising the following steps: S1, the raw materials of the core layer and the surface layer are uniformly mixed respectively, and then the core layer and the surface layer are sequentially laid in the order from bottom to top to obtain a pretreated board blank, wherein the mass ratio of the raw materials of the core layer to the raw materials of the surface layer is 13:7; S2, the pretreated board blank is hot-pressed at 195℃ and 2.5MPa for 12s, and then cooled and kept at room temperature for 6 days to maintain the moisture content of the shaving board at 4% to obtain a formed board blank; S3, the formed board blank is subjected to edge cutting, cooling and sanding treatment to obtain an antibacterial and mildew-proof shaving board.

[0020] Example 2 An antibacterial and mildew-proof shaving board, comprising a core layer and a surface layer, the surface layer comprising the following raw materials in parts by weight: 80 parts of wood dry shaving, 16 parts of adhesive, 0.7 parts of sodium methylsilanol, 0.7 parts of aldehyde reducing agent, the core layer comprising the following raw materials in parts by weight: 80 parts of wood dry shaving, 16 parts of adhesive, 0.7 parts of sodium methylsilanol, 0.7 parts of ammonium sulfate, 0.7 parts of diphenyl methane diisocyanate, 0.7 parts of aldehyde reducing agent; wherein the raw materials of the adhesive comprise the following components in parts by weight: 49 parts of formaldehyde aqueous solution, 44 parts of urea, 7 parts of melamine, 1 part of p-guanidino cyanide hydrochloride, 1 part of nano zinc oxide, 1.5 parts of mildew-proof agent; A preparation method of the adhesive, comprising the following steps: A1, adding formaldehyde aqueous solution in a reaction kettle, adjusting the pH value to 8.0 with sodium hydroxide aqueous solution to obtain a premix; A2, after the premix is warmed to 40℃, 20% of the total mass of urea is added, then the temperature is continuously increased to 50℃, and the reaction is kept for 35 min to obtain a first premix; A3, after the first premix is added with formaldehyde aqueous solution to adjust the pH value to 5.5, 30% of the total mass of urea is added, then the temperature is continuously increased to 80℃, and the reaction is kept for 80 min to obtain a second premix; A4, in the second premix, sodium hydroxide aqueous solution is added to adjust the pH value to 8.5, the temperature is decreased to 70℃, 50% of the total mass of urea is added, and the reaction is kept for 25 min, then the temperature is decreased to 60℃, and dehydration is performed to 10% of the total amount of raw materials to obtain a third premix; A5, in the third premix, the mildew-proof agent, p-guanidino cyanide hydrochloride and nano zinc oxide are mixed at 35℃ for 25 min, sodium hydroxide aqueous solution is added to adjust the pH value to 9.0, the temperature is decreased to 30℃, and the adhesive is obtained; A preparation method of an antibacterial and mildew-proof shaving board, comprising the following steps: S1, the raw materials of the core layer and the surface layer are uniformly mixed respectively, then the core layer and the surface layer are sequentially laid in the order from bottom to top, and a pretreated board blank is obtained by pre-pressing, wherein the mass ratio of the raw materials of the core layer to the raw materials of the surface layer is 13:7; S2, the pretreated board blank is hot-pressed at 220℃ and 2.7MPa for 10s, and then cooled and placed at room temperature for 6 days to keep the moisture content of the shaving board at 4%, and a shaped board blank is obtained; S3, the shaped board blank is subjected to edge cutting, cooling and sanding treatment to obtain an antibacterial and mildew-proof shaving board.

[0021] Example 3 An antibacterial and mildew-proof shaving board, comprising a core layer and a surface layer, the surface layer comprising the following raw materials in parts by weight: 85 parts of wood dry shaving, 18 parts of adhesive, 1 part of sodium methylsilanol, and 1 part of aldehyde reducing agent, and the core layer comprising the following raw materials in parts by weight: 85 parts of wood dry shaving, 18 parts of adhesive, 1 part of sodium methylsilanol, 1 part of ammonium sulfate, 1 part of diphenyl methane diisocyanate, and 1 part of aldehyde reducing agent; wherein the raw materials of the adhesive comprise the following components in parts by weight: 50 parts of formaldehyde aqueous solution, 45 parts of urea, 9 parts of melamine, 1 part of p-guanidino benzonitrile hydrochloride, 1 part of nano zinc oxide, and 2 parts of mildew-proof agent; A preparation method of the adhesive, comprising the following steps: A1, adding formaldehyde aqueous solution in a reaction kettle, adjusting the pH value to 8.0 by using sodium hydroxide aqueous solution to obtain a premix solution; A2, after the premix solution is warmed to 40℃, 20% of the total mass of urea is added, and then the temperature is continuously increased to 50℃, and the reaction is kept for 40 min to obtain a first premix solution; A3, after the pH value of the first premix solution is adjusted to 5.5 by adding formic acid aqueous solution, 30% of the total mass of urea is added, and then the temperature is continuously increased to 80℃, and the reaction is kept for 85 min to obtain a second premix solution; A4, the pH value of the second premix solution is adjusted to 8.5 by adding sodium hydroxide aqueous solution, the temperature is decreased to 70℃, 50% of the total mass of urea is added, and the reaction is kept for 30 min, and then the temperature is decreased to 60℃, and dehydration is performed to 10% of the total amount of the raw materials to obtain a third premix solution; A5, the third premix solution is mixed uniformly with the mildew-proof agent, p-guanidino benzonitrile hydrochloride and nano zinc oxide, the pH value is adjusted to 9.0 by adding sodium hydroxide aqueous solution, and the temperature is decreased to 30℃ to obtain the adhesive; A preparation method of an antibacterial and mildew-proof shaving board, comprising the following steps: S1, the raw materials of the core layer and the surface layer are mixed uniformly respectively, and then the core layer and the surface layer are sequentially laid from bottom to top to obtain a pretreated board blank, wherein the mass ratio of the raw materials of the core layer to the raw materials of the surface layer is 13:7; S2, the pretreated board blank is hot-pressed at 240℃ and 3MPa for 8s, and then cooled and kept at room temperature for 6 days to maintain the water content of the shaving board at 4% to obtain a formed board blank; S3, the formed board blank is subjected to edge cutting, cooling and sanding treatment to obtain an antibacterial and mildew-proof shaving board.

[0022] Example 4 The difference between this example and Example 2 is that the amount of p-guanidino benzonitrile hydrochloride added in this example is 1.5 parts.

[0023] Example 5 The difference between this example and Example 2 is that the amount of p-guanidinobenzonitrile hydrochloride added in this example is 2 parts.

[0024] Example 6 The difference between this example and Example 4 is that the methylsilanol is replaced by equal amounts of sodium methylsiliconate and polytrifluoropropylmethylsiloxane in a mass ratio of 7:3 in this example.

[0025] Example 7 The difference between this example and Example 4 is that the methylsilanol is replaced by equal amounts of sodium methylsiliconate and polytrifluoropropylmethylsiloxane in a mass ratio of 7:3.5 in this example.

[0026] Example 8 The difference between this example and Example 4 is that the methylsilanol is replaced by equal amounts of sodium methylsiliconate and polytrifluoropropylmethylsiloxane in a mass ratio of 7:4 in this example.

[0027] Example 9 The difference between this example and Example 4 is that the methylsilanol is replaced by equal amounts of polytrifluoropropylmethylsiloxane in this example.

[0028] Comparative Example 1 The difference between this comparative example and Example 1 is that the p-guanidinobenzonitrile hydrochloride is replaced by equal amounts of nano zinc oxide in this comparative example.

[0029] Comparative Example 2 The difference between this comparative example and Example 1 is that the nano zinc oxide is replaced by equal amounts of p-guanidinobenzonitrile hydrochloride in this comparative example.

[0030] Comparative Example 3 The difference between this comparative example and Example 1 is that neither nano zinc oxide nor p-guanidinobenzonitrile hydrochloride is added in this comparative example.

[0031] Test Example 1 The antibacterial and mildew-proof shaving boards prepared in Examples 1-9 and Comparative Examples 1-3 have a board thickness of 18 mm; the following tests are performed: (1) Internal bonding strength: the internal bonding strength of the shaving boards is tested according to the determination method in GB / T 4897-2015 "Shaving Board", and the test results are shown in Table 1 below; (2) Water resistance: the 24h water absorption thickness expansion rate of the shaving boards is determined according to the determination method in GB / T 4897-2015 "Shaving Board", and the determination method is: water absorption thickness expansion rate determination-method 1, and the determination results are shown in Table 2; (3) Mold resistance: The test was performed according to the standard of LY / T 2230-2013 "Evaluation of Mold Resistance of Wood-based Panels", the test strains were Aspergillus niger, Aspergillus flavus, Penicillium citrinum, Trichoderma viride, Aureobasidium pullulans and Chaetomium globosum, under the conditions of 80% RH and 28℃, the test lasted for 28 days, and the test results are shown in Table 3 below; (4) Antibacterial property: The test was performed according to the standard of LY / T 1926-2020 "Detection and Integration of Antibacterial Property of Wood-based Panels and Wood (Bamboo) Products", the test strains were Staphylococcus aureus and Escherichia coli, under the conditions of 90% RH and 37℃, the culture lasted for 24 hours, and the test results are shown in Table 4 below; (5) Formaldehyde emission: The test was performed according to the standard of GB 18580-2017 "Limit of Formaldehyde Emission of Wood-based Panels for Indoor Decoration", the test sample was a 500mm x 500mm panel, and the test results are shown in Table 5 below; Table 1 Performance test results in Examples 1-5 and Comparative Examples 1-3

[0032] The bonding strength of Examples 1-5 is higher than that of Comparative Examples 1-3, which indicates that the present application improves the bonding strength of the particle board by adding p-guanidinobenzonitrile hydrochloride and nano zinc oxide to the adhesive.

[0033] Table 2 Water resistance test results of particle boards in Examples 4, 6-9

[0034] The 24h water absorption thickness expansion rate of Examples 6-8 is lower than that of Examples 4 and 9, which indicates that the present application improves the water resistance of the particle board by adding the water resistance agent composed of sodium methylsilanol and polytrifluoropropylmethylsiloxane.

[0035] Table 3 Mold resistance test results in Examples 1-9 and Comparative Examples 1-3

[0036] The growth of Aspergillus niger, Aspergillus flavus, Penicillium citrinum, Trichoderma viride, Aureobasidium pullulans and Chaetomium globosum in Examples 1-9 is better than that in Comparative Examples 1-3, which indicates that the particle board of the present application has excellent mold resistance.

[0037] Table 4 Antibacterial property test results in Examples 1-9 and Comparative Examples 1-3

[0038] The growth of Staphylococcus aureus and Escherichia coli in Examples 1-9 is better than that in Comparative Examples 1-3, which indicates that the particle board of the present application has excellent antibacterial effect.

[0039] Table 5 Performance test results of Examples 1-3

[0040] The formaldehyde emission in Examples 1-3 is all less than or equal to 0.025 mg / m3, which meets the requirement of ENF board.

[0041] The above merely provides the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An antibacterial and antifungal particle board, characterized by, The core layer and the surface layer each independently comprises the following raw materials by weight: 75-85 parts of dry wood shaving, 15-18 parts of adhesive, 0.5-1 part of waterproof agent, 0.5-1 part of aldehyde reducing agent, 0.5-1 part of curing agent, and 0.5-1 part of diphenyl methane diisocyanate; The adhesive comprises the following raw materials by weight: 48-50 parts of formaldehyde aqueous solution, 43-45 parts of urea, 5-9 parts of melamine, 1-2 parts of p-guanidino cyanide hydrochloride, 1-2 parts of nano zinc oxide, and 1-2 parts of mildew-proof agent.

2. The antimicrobial mold and bacteria resistant shaving board according to claim 1, wherein, The preparation method of the adhesive comprises the following steps: A1, adding formaldehyde aqueous solution into a reaction kettle, adjusting the pH value to 7.5-8.0 with sodium hydroxide aqueous solution to obtain a premix; A2, after the premix is warmed to 40℃, 20% of the total mass of urea is added, and then the temperature is continuously increased to 50℃, and the reaction is kept for 30-40 min to obtain a first premix; A3, after the pH value of the first premix is adjusted to 5.0-5.5 by adding formic acid aqueous solution, 30% of the total mass of urea is added, and then the temperature is continuously increased to 80℃, and the reaction is kept for 75-85 min to obtain a second premix; A4, the pH value of the second premix is adjusted to 8.0-8.5 by adding sodium hydroxide aqueous solution, the temperature is decreased to 70℃, 50% of the total mass of urea is added, and the reaction is kept for 20-30 min, and then the third premix is obtained by cooling and dehydration; A5, the third premix is mixed with the mildew-proof agent, p-guanidino cyanide hydrochloride and nano zinc oxide, and then the pH value is adjusted to 8.5-9.0 by adding sodium hydroxide aqueous solution, and the adhesive is obtained by cooling.

3. The antimicrobial mold and bacteria resistant shaving board of claim 2, wherein, In step A5, the temperature for mixing is 35-40℃, and the mixing time is 15-25 min.

4. The antimicrobial mold and bacteria resistant shaving board of claim 1, wherein, The mass fraction of the water content of the dry wood shaving is 2.0%-4.0%.

5. The antimicrobial mold and bacteria resistant shaving board of claim 1, wherein, The curing agent is ammonium sulfate.

6. The antimicrobial mold and bacteria resistant shaving board of claim 1, wherein, The waterproof agent comprises polytrifluoropropylmethylsiloxane and sodium methylsilanol.

7. The antimicrobial mold and bacteria resistant shaving board of claim 6, wherein, The mass ratio of sodium methylsilanol to polytrifluoropropylmethylsiloxane is 7:3-4.

8. The antimicrobial mold and bacteria resistant shaving board of claim 1, wherein, The mass ratio of the raw material of the core layer to the raw material of the surface layer is 13:

7.

9. A method for producing an antibacterial and antifungal particle board according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1, the raw materials of the core layer and the surface layer are mixed uniformly respectively, and then the core layer and the surface layer are sequentially laid from bottom to top to obtain a pretreated board blank; S2, the pretreated board blank is hot-pressed to obtain a formed board blank; S3, the formed board blank is cut, cooled and sanded to obtain an antibacterial and mildew-proof shaving board.

10. The method of claim 9, wherein the method further comprises the step of applying a biocide to the wood particles prior to the step of mixing the wood particles with the binder. 5 In step S2, the temperature for hot-pressing is 195-240℃, the pressure for hot-pressing is 2.5-3 MPa, and the time for hot-pressing is 8-12 s.

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