Composite flexible material, biomass fiber flexible material and preparation method and application thereof

Abstract

The application discloses a biomass fiber flexible material, which comprises a biomass fiber non-woven fabric and a composite flexible material prepared from biomass components, inorganic components, bonding components and coupling components. The inorganic component particles are distributed on the surface of the biomass components, and the biomass components and the bonding components are connected by the coupling components through any one or a combination of several of chemical bonds, hydrogen bonds and van der Waals forces, so as to improve the performance of the material and solve the surface cracking and the formaldehyde release problem of the cushion layer of the impregnated glue film paper veneer artificial board.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of materials, and particularly relates to a composite material, especially a composite flexible material, a biomass fiber flexible material, and a preparation method and application thereof. BACKGROUND

[0002] In recent years, with the development of the whole-house customized furniture industry, the application of veneer artificial boards has been rapidly developed in the furniture field in China. The veneer material of artificial boards is mainly impregnated film paper, which has the functions of decoration, strengthening and protection for artificial boards, and accounts for about 60% of the total output of veneer artificial boards, and is widely used in the manufacture of furniture such as cabinets, wardrobes, decorative walls, etc. However, due to the climate difference between the south and the north of China and the anisotropy of wood, under different dry and wet conditions, the water in the wood inside the artificial board moves, and under the influence of external conditions, uneven dry shrinkage and wet expansion phenomena occur. Therefore, the dimensional stability of the artificial board is poor, and surface cracking problems easily occur. At present, in the production process of impregnated film paper veneer artificial boards, a layer of technical veneer is added as a cushion layer under the impregnated film paper of each board. This layer of technical veneer only plays the role of adjusting the flatness of the base material, but due to the use of urea-formaldehyde resin in the production process, it leads to formaldehyde release of the board, causing consumers to question the environmental performance of the product. Therefore, the surface cracking and formaldehyde release problems seriously affect the nationwide application of impregnated film paper veneer artificial boards. SUMMARY

[0003] In view of the problems and technical deficiencies of the existing products, the purpose of the present application is to provide a composite flexible material, a biomass fiber flexible material, and a preparation method and application thereof.

[0004] The flexible material of the present application aims to improve the surface cracking performance and formaldehyde-free release of impregnated film paper veneer artificial boards. Through the design of the composition of the material and the control of the morphology, the obtained flexible material is superior to technical veneer in terms of tensile performance, surface flatness, thermal stability, formaldehyde release, etc. As a cushion layer, it improves the stability of the impregnated film paper veneer artificial board, significantly reduces the occurrence of surface cracking and the performance defect of high formaldehyde release.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] One of the purposes of the present application is to provide a composite flexible material, which comprises a biomass component, an inorganic component, a bonding component and a coupling component.

[0007] Preferably, the biomass component comprises any one or a combination of at least two of bamboo powder, wood powder and straw powder.

[0008] Preferably, the biomass fiber material comprises any one of bamboo long fibers or non-woven fabric prepared therefrom, wood long fibers or non-woven fabric prepared therefrom, bamboo powder, wood powder, straw powder, or a combination of at least two thereof.

[0009] Preferably, the inorganic component comprises any one of calcium carbonate, titanium dioxide, montmorillonite, or a combination of at least two thereof.

[0010] Preferably, the inorganic component has a morphology of particles.

[0011] In the present application, the morphology of the inorganic component is selected to be particles, which helps to improve the physical and mechanical properties and chemical properties of the composite sheet material,

[0012] Preferably, the size of the inorganic component is 0.1 μm to 3 μm. Within this range, the material can be provided with relevant mechanical and optical properties, while reducing the impact on the surface finish and dimensional stability of the material.

[0013] Preferably, the mass ratio of the biomass component and the inorganic component is (2.7-5.3):1.

[0014] In the present application, the mass ratio of the biomass component and the inorganic component within this range can prepare biomass components with different mechanical properties and surface topography, while the flexible material has appropriate physicochemical properties and dimensional stability. Too much inorganic component will cause the material to have a loose structure and agglomeration phenomenon, and too much organic component will cause the material to have decreased mechanical properties and possible tight combination of components.

[0015] Preferably, the bonding component comprises any one of acrylic acid, methyl methacrylate, isobornyl methacrylate, methacrylamide, epoxy resin, soybean protein resin, and other biomass resins, or a combination of at least two thereof.

[0016] Preferably, the mass ratio of the biomass component powder and the bonding component is (0.12-0.31):1. For example, 0.12:1, 0.13:1, or 0.31:1.

[0017] In the present application, the mass ratio of the biomass component and the bonding component within this range can prepare flexible materials with different surface topography, while the mixed bonding emulsion has appropriate solid content and physicochemical properties. Too much biomass component powder in the mixed bonding emulsion will reduce the dispersibility of the biomass component powder and affect the mechanical properties, possibly causing the flexible material to drop off. Too little biomass component powder in the mixed bonding emulsion will result in a lower solid content in the mixed bonding emulsion and a decrease in the flexibility of the material.

[0018] Preferably, the coupling agent is added in the coupling component in an amount of 0wt% to 5wt%. For example, 0wt%, 1wt%, 3wt% or 5wt%.

[0019] Preferably, the coupling agent comprises any one or a combination of at least two of silane coupling agents such as gamma-aminopropyl triethoxysilane, maleic acid rod-acrylic acid copolymer, and aluminate coupling agent.

[0020] Preferably, the coupling agent is selected as gamma-aminopropyl triethoxysilane.

[0021] The additive content of the coupling component in the present application is within the range of modifying the characteristics of the biomass component to hydrophobic and lipophilic, and also improving the interfacial compatibility of the biomass component and the bonding component, and enhancing the physicochemical properties of the biomass component.

[0022] As a preferred technical solution, the present application also aims to provide a preparation process of a composite flexible material, comprising the following steps:

[0023] Step 1, taking 100 parts of biomass component by mass fraction, finely grinding the biomass component, adjusting the main disc speed parameter to 50-400r / min, adjusting the ball mill tank parameter to 100-800r / min, and setting the time to 1-5h, and using a screen to obtain a powder of the biomass component with a morphology size of 0.5-5μm;

[0024] Step 2, performing constant temperature drying treatment on the powder of the biomass component prepared in Step 1 at 103℃ for 5-12h, so as to ensure that the free water content in the powder of the biomass component is less than 1%, and the free water in the plant fiber will evaporate or produce volatile gas in the hot pressing process, and the evaporation of the free water will cause voids in the composite material, thereby reducing the mechanical properties of the material;

[0025] Step 3, taking a coupling agent in a mass ratio of (0.01-0.05):1 of the coupling agent to the powder component of the biomass component by mass fraction;

[0026] Step 4, taking 90-95 parts of an ethanol solution with a mass ratio of (9-19):1 of ethanol to pure water, mixing the ethanol solution with 5-10 parts of pure water uniformly, taking the coupling component and adding it to the ethanol aqueous solution, mixing uniformly, adding 1-10 parts of glacial acetic acid to adjust the pH of the mixed solution to 2-6, improving the diffusion efficiency of the coupling agent in the solvent, and obtaining a coupling component mixed solution after sufficient shaking and uniform shaking, sealing the coupling component mixed solution using a preservative film, and standing for 1-3h;

[0027] In the fifth step, the powder of the dried biomass component prepared in the second step is taken out and uniformly added into the coupling component mixed solution prepared in the fourth step. A stirrer is used to adjust the rotating speed to 50-200 r / min, and the mixture is stirred for 1-4 h, and then air-dried for 12-24 h in a ventilated place;

[0028] In the sixth step, after the ethanol and glacial acetic acid in the material prepared in the fifth step are volatilized, the material is subjected to constant temperature drying at 103 ℃ for 12-24 h until the powder of the modified biomass component is absolutely dry, and a crusher is used to crush the dried and modified bamboo powder until the powder of the modified biomass component is not lumped.

[0029] In the seventh step, 4-8 parts of the powder of the modified biomass component prepared in the sixth step and 1-3 parts of the inorganic component are weighed according to the mass, uniformly stirred, and subjected to constant temperature drying at 103 ℃ for 0.5-2 h.

[0030] In the eighth step, 30 parts of the bonding component are weighed according to the mass, the mixture prepared in the seventh step is uniformly poured into the bonding component, a stirrer is used to uniformly stir at a rotating speed of 50-200 r / min, and the stirring is performed for 1-10 min until no powder is aggregated, and a composite flexible material is obtained.

[0031] As a preferred technical solution, the purpose of the present application is also to provide a biomass fiber flexible material, which comprises a biomass fiber non-woven fabric and a composite flexible material prepared from a biomass component, an inorganic component, a bonding component and a coupling component. The inorganic component particles are distributed on the surface of the biomass component, and the biomass component and the bonding component are connected by the coupling component through any one or a combination of chemical bonds, hydrogen bonds and van der Waals forces, so as to improve the performance of the material and solve the surface cracking and the formaldehyde release problem of the impregnated glue film paper veneer artificial board.

[0032] Preferably, the biomass fiber non-woven fabric is a bamboo fiber non-woven fabric or a wood fiber non-woven fabric. Preferably, the grammage of the non-woven fabric is 20-80 g / m 2 , for example, 20 g / m 2 , 30 g / m 2 , 45 g / m 2 , 50 g / m 2 , 60 g / m 2 or 80 g / m 2 .

[0033] Preferably, the size of the biomass fiber non-woven fabric is greater than or equal to 30 cm, and the size of the powder-like biomass component is 0.5-5 μm. Within this range, the dispersion of the powder-like biomass component in the bonding component is facilitated, and the related mechanical properties of the material are improved. If the size is too large, the surface flatness is affected, the aggregation phenomenon occurs, and the mechanical properties and size stability of the material are reduced.

[0034] As a preferred technical solution, the purpose of this invention is also to provide a preparation process for biomass fiber flexible materials, which solves the problem of surface cracking of impregnated paper-faced artificial board materials, stabilizes the surface stability of impregnated paper-faced artificial board materials, and solves the problem of material defects caused by formaldehyde release of impregnated paper-faced artificial board materials.

[0035] To achieve the above objectives, the present invention adopts the following technical solution:

[0036] A process for preparing a biomass fiber flexible material includes the following steps:

[0037] Step 1: Completely immerse the biomass fiber nonwoven fabric in the composite flexible material and let it stand for 10–30 minutes. After removal, remove the surface mixing components to ensure that the nonwoven fabric coating rate is 5–10 μm. 2 / L, lay biomass fiber nonwoven fabric flat and cover with release paper on the top and bottom;

[0038] Step 2: Place the material prepared in Step 1 into a hot press. The temperature of the upper platen is 80-150℃, the temperature of the lower platen is 80-150℃, the hot pressing pressure is 0.5-2 MPa, and the hot pressing time is 3-10 min.

[0039] Step 3: After hot pressing the material prepared in step 2, place it in a cold press at room temperature. The hot pressing pressure is 0.5-2 MPa and the hot pressing time is 3-10 minutes. This step ensures that the material will not deform due to rapid temperature loss.

[0040] Step 4: Take out the material prepared in step 3 and trim and cut it to obtain biomass fiber flexible material.

[0041] As a preferred technical solution, the purpose of this invention is also to provide an application of a biomass fiber flexible material, which is used as a padding layer for impregnated paper in decorative artificial boards. Attached Figure Description

[0042] Figure 1 This is a scanning electron microscope image of the biomass fiber flexible material according to Embodiment 1 of the present invention.

[0043] Figure 2 This is a scanning electron microscope image of the biomass fiber flexible material of Embodiment 2 of the present invention.

[0044] Figure 3 This is the coupling reaction formula between γ-aminopropyltriethoxysilane and cellulose in the biomass component in Examples 1 and 2 of the present invention.

[0045] Figure 4 This is the reaction formula of cellulose and binding component in the biomass component after coupling in Examples 1 and 2 of the present invention.

[0046] Figure 5 This is a schematic diagram of the application structure of Embodiment 3 of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1 is an impregnated paper finishing material, 2 is a biomass fiber flexible material, and 3 is a plywood / blockboard substrate. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Example 1

[0051] A process for preparing a biomass fiber flexible material includes the following steps:

[0052] Step 1: Take 100 parts of moso bamboo powder by weight, and use a ball mill to finely grind the moso bamboo powder. Adjust the main disc speed parameter to 200 r / min, adjust the ball mill jar parameter to 500 r / min, set the time to 2h, and use a sieve to obtain moso bamboo powder with a morphological size of 1.5μm.

[0053] Step 2: Dry the bamboo powder obtained in Step 1 at a constant temperature of 103℃ for 10 hours to ensure that the free water content in the bamboo powder is less than 1%.

[0054] Step 3: Calculate by mass parts and take a coupling agent with a mass ratio of 0.01:1 between the coupling agent and bamboo powder, wherein the coupling agent is γ-aminopropyltriethoxysilane (KH550).

[0055] Step 4: Calculate by mass parts, take 95 parts of an ethanol solution with a mass ratio of 9:1 of ethanol to pure water, mix it evenly with 5 parts of pure water to obtain an ethanol-water solution, take out the γ-aminopropyltriethoxysilane and add it to this ethanol-water solution, mix evenly. The purpose of adding the ethanol-water solution is to prevent the hydrolysis of γ-aminopropyltriethoxysilane. Add 8 parts of glacial acetic acid to adjust the pH of the mixed solution to 4, which improves the diffusion efficiency of γ-aminopropyltriethoxysilane in the solvent. After shaking thoroughly, seal the mixed solution with plastic wrap and let it stand for 2 hours to obtain the coupling component mixed solution.

[0056] Step 5: Take out the dried bamboo powder prepared in step 2 and add it evenly to the coupling component mixture prepared in step 4. Use a stirrer to adjust the speed to 100 r / min and stir for 3 hours. Then air dry in a ventilated place for 24 hours.

[0057] Step 6: After the ethanol and glacial acetic acid in the material prepared in step 5 evaporate, let it stand at room temperature for 24 hours. Then, dry it at 103℃ for 18 hours until the modified bamboo powder is completely dry. Use a crusher to break the dried modified bamboo powder until there are no lumps in the modified bamboo powder.

[0058] Step 7: Mix 0.8 parts calcium carbonate, 0.6 parts titanium dioxide, and 0.8 parts organomontmorillonite by weight, and dry them at 100°C for 3 hours to obtain the inorganic component.

[0059] Step 8: Weigh 8 parts of the modified bamboo powder prepared in step 6 and 3 parts of the inorganic components prepared in step 7, stir them evenly, and dry the mixture at 103℃ for 1 hour.

[0060] Step 9: By weight, a water-based acrylic emulsion is prepared by mixing 55 parts of methyl methacrylate, 30 parts of isoborneol methacrylate, 10 parts of methacrylamide, and 5 parts of acrylic acid as the binding component.

[0061] Step 10: Weigh 30 parts of the binder component from step 9 by weight, pour the mixed components from step 8 evenly into the binder component, and use a stirrer to adjust the speed to 150 r / min and stir evenly for 5 minutes until there is no powder agglomeration.

[0062] Step 11: Cut to an area of ​​1m² 2 Weight is 50g / m 2 The bamboo fiber nonwoven spunlace fabric was completely impregnated in the mixed component prepared in step 10 and allowed to stand for 20 minutes. After removal, the surface mixed component was removed to ensure that the coating rate of the nonwoven fabric was 10m. 2 / L, lay the material flat and cover it with release paper on both sides;

[0063] Step 12: Place the material prepared in step 11 into a hot press. The temperature of the upper platen is 120°C, the temperature of the lower platen is 120°C, the hot pressing pressure is 1.2 MPa, and the hot pressing time is 6 min.

[0064] Step 13: After hot pressing the material prepared in step 12, place it in a cold press at room temperature, with a hot pressing pressure of 1.2 MPa and a hot pressing time of 7 minutes. This step ensures that the material will not deform due to rapid temperature loss.

[0065] Step 14: After taking out the material prepared in step 13, trim and cut it to obtain the biomass fiber flexible material required in this embodiment.

[0066] Example 2

[0067] A process for preparing a biomass fiber flexible material includes the following steps:

[0068] Step 1: Take 100 parts of moso bamboo powder by weight, and use a ball mill to finely grind the moso bamboo powder. Adjust the main disc speed parameter to 300 r / min, adjust the ball mill jar parameter to 500 r / min, and set the time to 1.5 h. Use a sieve to obtain moso bamboo powder with a morphological size of 5 μm.

[0069] Step 2: Dry the bamboo powder obtained in Step 1 at a constant temperature of 103℃ for 10 hours to ensure that the free water content in the bamboo powder is less than 1%.

[0070] Step 3: Calculate by mass parts and take a coupling agent with a mass ratio of 0.05:1 between the coupling agent and bamboo powder, wherein the coupling agent is γ-aminopropyltriethoxysilane (KH550).

[0071] Step 4: Calculate by mass parts, take 95 parts of an ethanol solution with a mass ratio of 9:1 of ethanol to pure water, mix it evenly with 5 parts of pure water to obtain an ethanol-water solution, take out the γ-aminopropyltriethoxysilane and add it to this ethanol-water solution, mix evenly. The purpose of adding the ethanol-water solution is to prevent the hydrolysis of γ-aminopropyltriethoxysilane. Add 5 parts of glacial acetic acid to adjust the pH of the mixed solution to 5, which improves the diffusion efficiency of γ-aminopropyltriethoxysilane in the solvent. After shaking thoroughly, seal the mixed solution with plastic wrap and let it stand for 2 hours to obtain the coupling component mixed solution.

[0072] Step 5: Take out the dried bamboo powder prepared in step 2 and add it evenly to the coupling component mixture prepared in step 4. Use a stirrer to adjust the speed to 100 r / min and stir for 3 hours. Then air dry in a ventilated place for 24 hours.

[0073] Step 6: After the ethanol and glacial acetic acid in the material prepared in step 5 evaporate, let it stand at room temperature for 24 hours. Then, dry it at 103℃ for 18 hours until the modified bamboo powder is completely dry. Use a crusher to break the dried modified bamboo powder until there are no lumps in the modified bamboo powder.

[0074] Step 7: Mix 1 part calcium carbonate, 1 part titanium dioxide and 1 part organomontmorillonite by mass and dry at 100°C for 3 hours to obtain the inorganic component.

[0075] Step 8: Weigh 8 parts of the modified bamboo powder prepared in step 6 and 3 parts of the inorganic components prepared in step 7, stir them evenly, and dry the mixture at 103℃ for 1 hour.

[0076] Step 9: By weight, a water-based acrylic emulsion prepared by mixing 47 parts of methyl methacrylate, 40 parts of isoborneol methacrylate, 8 parts of methacrylamide, and 5 parts of acrylic acid is used as the binding component.

[0077] Step 10: Weigh 30 parts of the binder component from step 9 by weight, pour the mixed components from step 8 evenly into the binder component, and use a stirrer to adjust the speed to 150 r / min and stir evenly for 5 minutes until there is no powder agglomeration.

[0078] Step 11: Cut to an area of ​​1m² 2 Weight is 50g / m 2 The bamboo fiber nonwoven spunlace fabric was completely impregnated in the mixed component prepared in step 10 and allowed to stand for 20 minutes. After removal, the surface mixed component was removed to ensure that the coating rate of the nonwoven fabric was 10m. 2 / L, lay the material flat and cover it with release paper on both sides;

[0079] Step 12: Place the material prepared in step 11 into a hot press. The temperature of the upper platen is 120°C, the temperature of the lower platen is 120°C, the hot pressing pressure is 1.2 MPa, and the hot pressing time is 6 min.

[0080] Step 13: After hot pressing the material prepared in step 12, place it in a cold press at room temperature, with a hot pressing pressure of 1.2 MPa and a hot pressing time of 7 minutes. This step ensures that the material will not deform due to rapid temperature loss.

[0081] Step 14: After taking out the material prepared in step 13, trim and cut it to obtain the biomass fiber flexible material required in this embodiment.

[0082] Example 3

[0083] This embodiment discloses a biomass fiber flexible material. The preparation method of the biomass fiber flexible material is described in Example 1 or Example 2. The biomass fiber flexible material is used as a pad layer for impregnated paper in decorative artificial board and is disposed between the impregnated paper decorative material and the plywood / blockboard substrate.

[0084] Example 4

[0085] To further verify the performance of the biomass fiber flexible material prepared in this embodiment, commercially available engineered wood veneer was used as a control group, and the following tests were conducted:

[0086] 1. Tensile properties test: A universal testing machine was used. 20 samples were tested in both the test group and the control group. After removing the maximum and minimum values, the average value was taken. The test was repeated 10 times, and the average value was taken again.

[0087] 2. Surface flatness test: A roughness tester was used. Five samples were taken from each of the test group and the control group. Ten points were randomly measured on each sample, and the average value was taken. The test was repeated 10 times, and the average value was taken again.

[0088] 3. Thermal stability test: The muffle furnace combustion test was conducted at a temperature of 25-600℃. The test ended when the temperature reached 600℃. The mass of the residue was weighed and the residual weight percentage was calculated. 20 samples were tested in both the test group and the control group, and the average value was taken. The test was repeated 10 times, and the average value was taken again.

[0089] 4. Formaldehyde release was detected using the desiccator method. 20 samples were tested in both the test group and the control group, and the average value was taken. The test was repeated 10 times, and the average value was taken again.

[0090] The specific test results are as follows:

[0091]

[0092]

[0093] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0094] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

Claims

1. A composite flexible material, characterized in that, It includes biomass components, inorganic components, binding components, and coupling components; the biomass components include any one or a combination of at least two of bamboo powder, wood powder, and straw powder; The mass ratio of the biomass component to the inorganic component is (2.7–5.3):1; The mass ratio of the biomass component to the binder component is (0.12–0.31):1; The inorganic components include any one or a combination of at least two of calcium carbonate, titanium dioxide, and montmorillonite. The adhesive component includes any one or a combination of at least two of the following: acrylic acid, methyl methacrylate, isoborneol methacrylate, methacrylamide, epoxy resin, soybean protein resin, and other biomass resins. The coupling agent content in the coupling component is >0 wt%, and the coupling agent content in the coupling component is ≤5 wt%. The coupling agent includes any one or at least a combination of two of the following: silane coupling agent, maleic anhydride-acrylic acid copolymer, and aluminate coupling agent.

2. The composite flexible material as described in claim 1, characterized in that, Its preparation method includes the following steps: Step 1: Take 100 parts of biomass component by weight, and finely grind the biomass component to obtain biomass material powder with a morphological size of 0.5μm to 5μm. Step 2 involves drying the biomass powder obtained in Step 1 at a constant temperature of 103°C for 5–12 hours to reduce the free water content in the biomass powder to less than 1%. Step 3: Take out the dried biomass component powder prepared in Step 2, add it evenly to the coupling component and stir. Use a stirrer to adjust the speed to 50-200 r / min and stir for 1-4 h. Then air dry in a ventilated place for 12-24 h to obtain the modified biomass component powder. Step 4: Place the bamboo powder in a ventilated place at room temperature for 24-30 hours, and then dry it at a constant temperature of 103℃ for 12-24 hours until the modified biomass powder is completely dry. Use a crusher to break the dried modified bamboo powder until the modified biomass powder is free of lumps. Step 5: Weigh 4 to 8 parts of the modified biomass powder prepared in Step 4 and 1 to 3 parts of the inorganic component according to the mass parts, stir evenly to obtain the mixed component, and dry the mixed component at a constant temperature of 103℃ for 0.5 to 2 hours. Step 6: Weigh 30 parts of the binder component by weight, and pour the mixture from step 5 evenly into the binder component. Use a stirrer to adjust the speed to 50-200 r / min and stir evenly for 1-10 minutes until there is no powder agglomeration to obtain the composite flexible material.

3. A flexible biomass fiber material, characterized in that, Its preparation method includes the following steps: Step 1: Completely immerse the biomass fiber nonwoven fabric in the composite flexible material prepared according to claim 2, and let it stand for 10-30 minutes. After removal, remove the surface composite flexible material to ensure that the nonwoven fabric coating rate is 5-10 μm. 2 / L, lay biomass fiber nonwoven fabric flat and cover with release paper on the top and bottom; Step 2: Place the material prepared in Step 1 into a hot press. The temperature of the upper platen is 80-150℃, the temperature of the lower platen is 80-150℃, the hot pressing pressure is 0.5-2 MPa, and the hot pressing time is 3-10 min. Step 3: After hot pressing the material prepared in step 2, place it in a cold press at room temperature, with a hot pressing pressure of 0.5-2 MPa and a hot pressing time of 3-10 min. Step 4: Take out the materials prepared in steps 1-3 and trim and cut them to obtain flexible biomass fiber materials.

4. The biomass fiber flexible material as described in claim 3, characterized in that, The biomass fiber nonwoven fabric includes either nonwoven fabric made from bamboo long fibers or nonwoven fabric made from wood long fibers.

5. The application of the biomass fiber flexible material as described in claim 4, characterized in that, A padding layer for impregnated paper used in decorative engineered wood panels.

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