High-toughness plate and preparation method thereof
By using modified palm fiber and abaca fiber combined with hazelnut shell powder and talc as composite fillers, the problem of insufficient toughness in fiberboard was solved, and high-toughness boards were prepared, improving the tensile properties and stress distribution capabilities of the material.
Patent Information
- Application Number
- CN202512022699.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-06
AI Technical Summary
Fiberboard has poor toughness. During the production process, the entanglement and bonding between fibers are weakened, which increases the brittleness of the board. It is difficult to absorb energy through deformation, and the lack of directionality leads to stress concentration and easy breakage.
High-toughness boards are prepared by using modified palm fiber and modified abaca fiber as the main materials, combined with composite fillers of hazelnut shell powder and talc powder, and using white latex, urea-formaldehyde resin, phenolic resin or isocyanate resin as adhesives, through pulping, drying and hot pressing processes.
It significantly improves the toughness and tensile properties of the board, enhances the overall strength of the material, improves stress distribution, and improves the board's fracture resistance.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of fiberboard technology, specifically relating to a high-toughness board and its preparation method. Background Technology
[0002] Fiberboard is a sheet-like material produced from plant fibers through processes such as fiber separation, board laying, hot pressing, or drying. Fiberboard has a wide range of applications. In the building and decoration materials industry, it can be used for partition walls, ceiling panels, and flooring. Modern panel furniture mostly uses MDF as its material. Hardboard is mostly used for packaging materials, while softboard is mainly used for sound insulation and thermal insulation in buildings. MDF is also commonly used for interior partitions in modern trains, automobiles, and passenger ships. Furthermore, MDF is widely used for the enclosures of electrical appliances, such as televisions, radios, and stereo systems.
[0003] Fiberboard generally has poor toughness. While wood fibers themselves possess a certain degree of flexibility, during production, the fibers are crushed and ground, shortening their length and reducing their aspect ratio, thus weakening the entanglement and bonding ability between fibers. Fiberboard often uses thermosetting adhesives such as urea-formaldehyde resin or phenolic resin. These adhesives, after curing, have high hardness and poor elasticity, increasing the overall brittleness of the board. Fiberboard is pressed and formed under high temperature and pressure, resulting in a tightly compressed fiber structure, low porosity, and concentrated internal stress, making it difficult for the board to absorb energy through deformation. During production, the fibers are randomly arranged, lacking directionality (compared to the layered structure of plywood and solid wood), and cannot disperse stress along the grain like natural wood. Fiberboard has a uniform structure, but this very uniformity prevents stress from being dispersed through localized deformation (such as fiber slippage and rearrangement), easily leading to concentrated fractures. Summary of the Invention
[0004] The purpose of this invention is to provide a high-toughness sheet material and its preparation method.
[0005] A high-toughness board comprises the following raw materials in parts by weight: 30-50 parts modified palm fiber, 30-50 parts modified abaca fiber, 10-20 parts filler, 20-30 parts adhesive, 3-10 parts fire retardant, 3-5 parts dispersant, and 20-40 parts water.
[0006] The modified palm fiber is prepared as follows: 5-10g of palm fiber is soaked in 60-90ml of deionized water, followed by the addition of 1-3ml of 10-20wt% sodium hydroxide solution. After stirring continuously for 2-5 hours, the palm fiber is dried to obtain alkaline palm fiber. 1-3g of palmitic acid, 1-3g of stearic acid, and 0.2-0.5g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 80-90℃ for 4-8 hours, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0007] The modified abaca fiber is prepared as follows: 5-12g of abaca fiber is soaked in 50-100ml of deionized water, followed by the addition of 1-4ml of 10-20wt% sodium hydroxide solution. After stirring continuously for 2-5 hours, the abaca fiber is dried to obtain alkaline abaca fiber. 1-3g of palmitic acid, 1-3g of stearic acid, and 0.2-0.5g of stannous oxalate are added to the alkaline abaca fiber and stirred evenly. The mixture is then reacted at 80-90℃ for 4-8 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0008] The filler is a mixture of hazelnut shell powder and talc powder in a mass ratio of 1:1.
[0009] The adhesive is one or more of white latex, urea-formaldehyde resin, phenolic resin, and isocyanate resin.
[0010] The fire retardant is one or more of the following: alumina, asbestos powder, ammonium sulfate, borax, and perlite.
[0011] The dispersant is one or more of calcium carbonate, bentonite, sodium dodecylbenzenesulfonate, and naphthalenesulfonate formaldehyde condensate.
[0012] The preparation method of the high-toughness plate is carried out according to the following steps:
[0013] (1) Pulping: Take 30-50 parts of modified palm fiber, 30-50 parts of modified abaca fiber, 10-20 parts of filler, 20-30 parts of binder, 3-10 parts of fire retardant, 3-5 parts of dispersant, and 20-40 parts of water according to the weight ratio, put them into a mixer and stir. The stirring speed is 600-800 r / min and the stirring time is 20-40 min to obtain a mixed slurry.
[0014] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying to obtain a slurry with a water content of 5-10%;
[0015] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0016] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine and hot pressed to obtain a high-toughness sheet.
[0017] The drying process in step (2) is as follows: the first drying temperature is 200-300℃ and the time is 6-12S; the second drying temperature is 150-180℃ and the time is 10-20S; and the third drying temperature is 130-140℃ and the time is 15-20S.
[0018] The hot pressing pressure is 5-10 MPa, the temperature is 160-220℃, and the time is 3-6 min.
[0019] The beneficial effects of the present invention are as follows: The main materials of the board prepared by the present invention are modified palm fiber and modified abaca fiber, which significantly improves the toughness of the material. The application of hazelnut shell powder and talc powder composite filler in the components enhances the tensile properties of the material and has a synergistic effect. Detailed Implementation
[0020] To facilitate understanding of the present invention, a more comprehensive description will be given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.
[0021] Example 1
[0022] A high-toughness board comprises the following raw materials in parts by weight: 40 parts modified palm fiber, 40 parts modified abaca fiber, 15 parts filler, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder mixed in a mass ratio of 1:1.
[0023] The modified palm fiber is prepared as follows: 8g of palm fiber is soaked in 70ml of deionized water, then 2ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 4h. The palm fiber is then dried to obtain alkaline palm fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 85℃ for 6h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0024] The modified abaca fiber is prepared as follows: 8g of abaca fiber is soaked in 80ml of deionized water, then 2ml of 13wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 85℃ for 6 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0025] The preparation method of the high-toughness plate is carried out according to the following steps:
[0026] (1) Pulping: Take 40 parts of modified palm fiber, 40 parts of modified abaca fiber, 15 parts of filler, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate, and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0027] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0028] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0029] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0030] Example 2
[0031] A high-toughness board comprises the following raw materials in parts by weight: 32 parts modified palm fiber, 32 parts modified abaca fiber, 12 parts filler, 21 parts urea-formaldehyde resin, 3 parts borax, 3 parts bentonite, and 22 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder mixed in a mass ratio of 1:1.
[0032] The modified palm fiber is prepared as follows: 6g of palm fiber is soaked in 70ml of deionized water, then 1ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3h. The palm fiber is then dried to obtain alkaline palm fiber. 1g of palmitic acid, 1g of stearic acid and 0.2g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 80℃ for 5h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0033] The modified abaca fiber is prepared as follows: 6g of abaca fiber is soaked in 55ml of deionized water, then 1ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 1g of palmitic acid, 1g of stearic acid and 0.3g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 80℃ for 5 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0034] The preparation method of the high-toughness plate is carried out according to the following steps:
[0035] (1) Pulping: Take 32 parts of modified palm fiber, 32 parts of modified abaca fiber, 12 parts of filler, 21 parts of urea-formaldehyde resin, 3 parts of borax, 3 parts of bentonite, and 22 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 600 r / min and the stirring time is 25 min to obtain the mixed slurry.
[0036] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 280℃ and the time is 10S; the second drying temperature is 180℃ and the time is 18S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 6%.
[0037] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0038] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 6MPa, the temperature is 170℃, and the time is 4min to obtain a high-toughness sheet.
[0039] Example 3
[0040] A high-toughness board comprises the following raw materials in parts by weight: 50 parts modified palm fiber, 50 parts modified abaca fiber, 20 parts filler, 30 parts isocyanate resin, 10 parts asbestos powder, 5 parts calcium carbonate, and 40 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder mixed in a mass ratio of 1:1.
[0041] The modified palm fiber is prepared as follows: 10g of palm fiber is soaked in 85ml of deionized water, then 3ml of 16wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 5h. The palm fiber is then dried to obtain alkaline palm fiber. 3g of palmitic acid, 3g of stearic acid and 0.4g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 85℃ for 8h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0042] The modified abaca fiber is prepared as follows: 12g of abaca fiber is soaked in 100ml of deionized water, then 4ml of 16wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 5 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 3g of palmitic acid, 3g of stearic acid and 0.5g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 90℃ for 8 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0043] The preparation method of the high-toughness plate is carried out according to the following steps:
[0044] (1) Pulping: Take 50 parts of modified palm fiber, 50 parts of modified abaca fiber, 20 parts of filler, 30 parts of isocyanate resin, 10 parts of asbestos powder, 5 parts of calcium carbonate and 40 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 800 r / min and the stirring time is 40 min to obtain the mixed slurry.
[0045] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 200℃ and the time is 8S; the second drying temperature is 150℃ and the time is 15S; the third drying temperature is 130℃ and the time is 18S, to obtain a slurry with a water content of 10%.
[0046] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0047] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 9 MPa, the temperature is 220℃, and the time is 5 min to obtain a high-toughness sheet.
[0048] Comparative Example 1
[0049] A high-toughness board comprises the following raw materials in parts by weight: 80 parts modified abaca fiber, 15 parts filler, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder in a mass ratio of 1:1.
[0050] The modified abaca fiber is prepared as follows: 8g of abaca fiber is soaked in 80ml of deionized water, then 2ml of 13wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 85℃ for 6 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0051] The preparation method of the high-toughness plate is carried out according to the following steps:
[0052] (1) Pulping: Take 80 parts of modified abaca fiber, 15 parts of filler, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0053] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0054] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0055] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0056] Comparative Example 2
[0057] A high-toughness board comprises the following raw materials in parts by weight: 80 parts modified palm fiber, 15 parts filler, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder in a mass ratio of 1:1.
[0058] The modified palm fiber is prepared as follows: 8g of palm fiber is soaked in 70ml of deionized water, then 2ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 4h. The palm fiber is then dried to obtain alkaline palm fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 85℃ for 6h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0059] The preparation method of the high-toughness plate is carried out according to the following steps:
[0060] (1) Pulping: Take 80 parts of modified palm fiber, 15 parts of filler, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0061] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0062] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0063] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0064] Comparative Example 3
[0065] A high-toughness board comprises the following raw materials in parts by weight: 40 parts palm fiber, 40 parts abaca fiber, 15 parts filler, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water; wherein the filler is a mixture of hazelnut shell powder and talc powder in a mass ratio of 1:1.
[0066] The preparation method of the high-toughness plate is carried out according to the following steps:
[0067] (1) Pulping: Take 40 parts of palm fiber, 40 parts of abaca fiber, 15 parts of filler, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0068] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0069] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0070] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0071] Comparative Example 4
[0072] A high-toughness board comprises the following raw materials in parts by weight: 40 parts modified palm fiber, 40 parts modified abaca fiber, 15 parts hazelnut shell powder, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water.
[0073] The modified palm fiber is prepared as follows: 8g of palm fiber is soaked in 70ml of deionized water, then 2ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 4h. The palm fiber is then dried to obtain alkaline palm fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 85℃ for 6h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0074] The modified abaca fiber is prepared as follows: 8g of abaca fiber is soaked in 80ml of deionized water, then 2ml of 13wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 85℃ for 6 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0075] The preparation method of the high-toughness plate is carried out according to the following steps:
[0076] (1) Pulping: Take 40 parts of modified palm fiber, 40 parts of modified abaca fiber, 15 parts of hazelnut shell powder, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate, and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0077] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0078] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0079] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0080] Comparative Example 5
[0081] A high-toughness board comprises the following raw materials in parts by weight: 40 parts modified palm fiber, 40 parts modified abaca fiber, 15 parts talc powder, 25 parts white latex, 8 parts alumina, 4 parts sodium dodecylbenzenesulfonate, and 30 parts water.
[0082] The modified palm fiber is prepared as follows: 8g of palm fiber is soaked in 70ml of deionized water, then 2ml of 12wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 4h. The palm fiber is then dried to obtain alkaline palm fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline palm fiber and stirred evenly. The mixture is then reacted at 85℃ for 6h, cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
[0083] The modified abaca fiber is prepared as follows: 8g of abaca fiber is soaked in 80ml of deionized water, then 2ml of 13wt% sodium hydroxide solution is added, and the mixture is stirred continuously for 3 hours. The abaca fiber is then dried to obtain alkaline abaca fiber. 2g of palmitic acid, 2g of stearic acid and 0.3g of stannous oxalate are added to the alkaline abaca fiber, and the mixture is stirred evenly. The mixture is then reacted at 85℃ for 6 hours, cooled to room temperature, and finally washed and dried to obtain the modified abaca fiber.
[0084] The preparation method of the high-toughness plate is carried out according to the following steps:
[0085] (1) Pulping: Take 40 parts of modified palm fiber, 40 parts of modified abaca fiber, 15 parts of talc powder, 25 parts of white latex, 8 parts of alumina, 4 parts of sodium dodecylbenzenesulfonate, and 30 parts of water according to the weight ratio, put them into the mixer and stir. The stirring speed is 700 r / min and the stirring time is 30 min to obtain the mixed slurry.
[0086] (2) Drying: The slurry prepared in step (1) is put into a drying device for drying. The first drying temperature is 260℃ and the time is 8S; the second drying temperature is 170℃ and the time is 16S; the third drying temperature is 135℃ and the time is 18S, to obtain a slurry with a water content of 8%.
[0087] (3) Initial blank forming: The slurry prepared in step (2) is added into the molding mold, and the molding mold is controlled to press and form the initial blank.
[0088] (4) Hot pressing: The blank prepared in step (3) is placed in a hot pressing machine for hot pressing. The pressure of hot pressing is 8MPa, the temperature is 190℃, and the time is 5min to obtain a high-toughness sheet.
[0089] Experimental example:
[0090] The elastic modulus (MPa) of the high-toughness boards prepared in Examples 1-3 and Comparative Examples 1-3 was determined according to GB / T 17657-2022 "Test Methods for Physical and Chemical Properties of Wood-based Panels and Decorative Wood-based Panels". The experimental results were statistically analyzed using SPSS 24.0 software, and the quantitative data were analyzed using... Mean ± standard deviation is expressed as mean ± standard deviation. The Kolmogorov-Smirnov test was used to test the normality of the data. For normally distributed data, the t-test was used to compare the differences in means between two groups. A p-value < 0.05 was considered statistically significant. The results are shown in Table 1.
[0091] Table 1
[0092]
[0093] Note: * indicates that compared with Example 1 group, P<0.05.
[0094] The tensile strength of the plates prepared in Examples 1-3 and Comparative Examples 4-5 was determined, and the results are shown in Table 2:
[0095] Table 2
[0096]
[0097] Note: * indicates that compared with Example 1 group, P<0.05.
[0098] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.
Claims
1. A high toughness sheet material, characterized by, The formula raw material comprises the following components in parts by weight: modified palm fiber 30-50 parts, modified banana hemp fiber 30-50 parts, filler 10-20 parts, adhesive 20-30 parts, fire retardant 3-10 parts, dispersing agent 3-5 parts, and water 20-40 parts.
2. The high toughness sheet material of claim 1, wherein, The preparation method of the modified palm fiber is as follows: 5-10 g of palm fiber is soaked in 60-90 ml of deionized water, then 1-3 ml of 10-20 wt% sodium hydroxide solution is added, and the palm fiber is dried after being stirred for 2-5 h to obtain alkaline palm fiber; 1-3 g of palm acid, 1-3 g of stearic acid and 0.2-0.5 g of stannous oxalate are added to the alkaline palm fiber, which is stirred uniformly, then the reaction is carried out at 80-90 °C for 4-8 h, and then cooled to room temperature, and finally washed and dried to obtain the modified palm fiber.
3. The high toughness sheet material of claim 1, wherein, The preparation method of the modified banana hemp fiber is as follows: 5-12 g of banana hemp fiber is soaked in 50-100 ml of deionized water, then 1-4 ml of 10-20 wt% sodium hydroxide solution is added, and the banana hemp fiber is dried after being stirred for 2-5 h to obtain alkaline banana hemp fiber; 1-3 g of palm acid, 1-3 g of stearic acid and 0.2-0.5 g of stannous oxalate are added to the alkaline banana hemp fiber, which is stirred uniformly, then the reaction is carried out at 80-90 °C for 4-8 h, and then cooled to room temperature, and finally washed and dried to obtain the modified banana hemp fiber.
4. The high toughness sheet material of claim 1, wherein, The filler is a mixture of hazelnut shell powder and talc powder in a mass ratio of 1:
1.
5. The high toughness sheet material of claim 1, wherein, The adhesive is one or more of white latex, urea-formaldehyde resin, phenol-formaldehyde resin and isocyanate resin.
6. The high toughness sheet material of claim 1, wherein, The fire retardant is one or more of aluminum oxide, asbestos powder, ammonium sulfate, borax and perlite.
7. The high toughness sheet material of claim 1, wherein The dispersing agent is one or more of calcium carbonate, bentonite, sodium dodecyl benzene sulfonate and naphthalene sulfonate formaldehyde condensate.
8. The method for preparing the high-toughness plate according to claim 1, characterized in that, The following steps are taken: (1) pulp preparation: according to parts by weight, 30-50 parts of modified palm fiber, 30-50 parts of modified banana hemp fiber, 10-20 parts of filler, 20-30 parts of adhesive, 3-10 parts of fire retardant, 3-5 parts of dispersing agent and 20-40 parts of water are put into a stirrer and stirred at a stirring speed of 600-800 r / min for 20-40 min to obtain a mixed slurry; (2) drying: the slurry prepared in step (1) is put into a drying device for drying to obtain a slurry with a water content of 5-10%; (3) initial blank forming: the slurry prepared in step (2) is added to a forming mold, and the forming mold is controlled to be pressed and formed to obtain an initial blank; (4) hot pressing: the initial blank prepared in step (3) is placed in a hot pressing machine for hot pressing to obtain a high-toughness plate.
9. The method for preparing the high-toughness plate according to claim 8, characterized in that, The drying in step (2) is as follows: the first drying temperature is 200-300 °C, and the time is 6-12 s; the second drying temperature is 150-180 °C, and the time is 10-20 s; and the third drying temperature is 130-140 °C, and the time is 15-20 s.
10. The method for preparing the high-toughness plate according to claim 8, characterized in that, The hot pressing pressure is 5-10 MPa, the temperature is 160-220 °C, and the time is 3-6 min.