Preparation process of environment-friendly decorative plate

Abstract

The invention discloses a preparation process of an environment-friendly decorative plate, and relates to the technical field of decorative plates, and the preparation process comprises the following steps: mixing main raw materials for later use, preparing additives for later use, sequentially feeding the main raw materials and the additives into a kneading machine for treatment, taking out and cutting to obtain the decorative plate. According to the invention, through the use of the additive and the use of the modified straw fiber after the additive is added into the preparation process of the decorative plate, the effect of improving the strength performance of the decorative plate is achieved, and after the straw is modified, the hydroxyl-terminated hyperbranched polymer is adsorbed on the surface of the straw fiber, and the formed plate is relatively rough; the contact area and mechanical locking of the straw fibers in the plate material are increased, the overall combination stability of the decorative plate material is improved, and then the strength performance of the decorative plate is improved.

Description

Technical Field

[0001] The invention relates to the technical field of decorative panels, in particular to a preparation process of an environmentally friendly decorative panel. Background Art

[0002] Decorative panels are a type of man-made board with a variety of wood grain or patterns on the surface. They are bright and smooth with bright and beautiful colors. At the same time, they have good physical properties such as high wear resistance, heat resistance, cold resistance and fire resistance. Many high-end houses’ walls and roofs, well-made cabinets, cupboards, tables, beds, workbenches for precision instruments, laboratory benches, televisions, radios and other broadcasting and telecommunications equipment casings mostly use this new type of decorative panel.

[0003] In the prior art, decorative panels are manufactured using a process that mixes multiple materials. This often results in gaps between the materials of varying densities after molding, affecting the stability of the material bond and, in turn, the strength of the decorative panel. Based on this, the present invention provides a process for manufacturing environmentally friendly decorative panels.

[0004] Therefore, we proposed a preparation process of an environmentally friendly decorative board in order to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a process for preparing an environmentally friendly decorative board. The decorative board prepared by the present invention has good strength and hardness properties.

[0006] To achieve the above object, the present invention provides the following technical solution: a process for preparing an environmentally friendly decorative board, characterized in that it comprises the following steps: S1: Mix the main raw materials and set aside; S2: prepare the additives for use; S3: The main raw material and the additive are sequentially fed into a kneader for processing, and the decorative board is obtained after being taken out and cut; The main raw materials are composed of the following raw materials in parts by weight: 90-110 parts of polyvinyl chloride resin, 25-35 parts of inorganic filler, 10-15 parts of wood cellulose, 6-8 parts of dispersant, 6-8 parts of foaming agent and 4-6 parts of flame retardant; The additive is composed of the following raw materials in parts by weight: 20 to 30 parts of modified straw fiber, 15 to 20 parts of inorganic filler, 10 to 15 parts of vermiculite powder, 8 to 10 parts of mica powder and 3 to 5 parts of activated carbon powder.

[0007] Furthermore, the modified straw fiber is prepared by the following steps: Step 1: Obtain straw material, rinse the straw 3-5 times and dry it, cut it into small pieces of 3-5 mm, add it into a grinder for grinding, sieve it after grinding to obtain straw powder, and set aside; Step 2: Add sodium hydroxide solution with a mass of 15-20% of the mass of the straw powder to the straw powder, soak for 5-8 hours, then add deionized water with a mass of 8-10% of the mass of the straw powder, stir and mix to obtain a soaking solution for standby use; Step 3: Add 8-10% of the mass of the soaking liquid to the soaking liquid with anhydrous ethanol, stir and mix, and soak for 40-50 minutes. After soaking, put it into an oven and set it to 85-95℃ for drying for 5-8 hours. After taking it out, put it into a hot press and set it to 220℃ for preheating for 1.5 minutes. After the preheating, set it to 5-7Mpa for hot pressing for 2-3 minutes. After taking it out, cut it into small pieces, grind it, and sieve it to obtain modified straw fiber.

[0008] Furthermore, the additive is prepared by the following method: modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and put into a mixer, set to medium-low speed mixing for 5-8 minutes, and after mixing, put into an oven and set to 60-70°C for drying for 20-30 minutes to obtain the additive.

[0009] Furthermore, the dispersant is selected from any one of polyphosphate, sodium tripolyphosphate, and alkylbenzene sulfonate, and the foaming agent is selected from any one of ammonium carbonate, ammonium bicarbonate, and ammonium nitrite.

[0010] Furthermore, the flame retardant is selected from any one of aluminum hydroxide, phosphate ester, and magnesium hydroxide.

[0011] Furthermore, the modified straw fiber grinding particle size is ≤75 μm.

[0012] Furthermore, the vermiculite powder is prepared by the following method: vermiculite raw material is selected and subjected to high-temperature roasting, grinding, and screening to obtain a powder raw material, a pure acrylic emulsion with a mass accounting for 4 to 6% of the mass of the vermiculite raw material is added to the powder raw material, and the powder raw material is sent into a mixer and stirred at high speed for 35 to 40 minutes. After the mixing is completed, the material is filtered and sent into a vacuum drying oven for treatment to obtain the vermiculite powder.

[0013] Furthermore, the vermiculite powder has a grinding particle size of ≤100 μm.

[0014] Furthermore, the processing method in step S3 is: weighing polyvinyl chloride resin, inorganic filler, wood cellulose, dispersant, foaming agent and flame retardant as needed and adding them to a kneader, kneading for 20 to 30 minutes, then weighing modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder as needed and adding them to the kneader, continuing to process for 15 to 20 minutes to obtain a mixture.

[0015] Furthermore, the mixture is placed in a mold, a foaming agent heating plate is added to the mold, the temperature is set to 180-190°C, and the heat treatment is carried out for 15-20 minutes. Then, the mold is opened to obtain a foamed board, and the foamed board is sent to an oven and dried at 75-80°C for 4-5 hours. After taking it out, wait for it to cool to room temperature and cut it as needed to obtain a decorative board.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses an additive, and after the additive is added to the preparation process of the decorative board, the modified straw fiber is used therein to improve the strength performance of the decorative board. After the straw is modified, the terminal hydroxyl hyperbranched polymer is adsorbed on the surface of the straw fiber, and the formed board is made rougher, which increases the contact area and mechanical locking of the straw fiber in the board material, improves the overall bonding stability of the decorative board material, and thus improves the strength performance of the decorative board; 2. The present invention uses vermiculite powder as an additional raw material in the preparation of decorative boards. Vermiculite powder is a silicate mineral that is rich in silicon, aluminum and other elements. It can play a role in filling micropores during the preparation and molding of the board, thereby improving the compactness and density of the material, thereby improving the overall hardness performance of the decorative board. 3. The present invention adds straw as the main raw material of the additive into the preparation process. The straw is taken from natural recycled materials. After recycling, it can improve the utilization rate of resources. Moreover, its decomposition products are all natural substances with good biodegradability. It can improve the pollution caused to the environment after the decorative panels are discarded, and meet the needs of environmental protection. DETAILED DESCRIPTION

[0017] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The present invention uses an additive, and after the additive is added to the preparation process of the decorative board, the modified straw fiber is used therein to improve the strength performance of the decorative board. After the straw is modified, the terminal hydroxyl hyperbranched polymer is adsorbed on the surface of the straw fiber, and the formed board is made rougher, which increases the contact area and mechanical locking of the straw fiber in the board material, improves the overall bonding stability of the decorative board material, and further improves the strength performance of the decorative board. The present invention uses vermiculite powder as an additional raw material in the preparation of decorative boards. Vermiculite powder is a silicate mineral that is rich in silicon, aluminum and other elements. It can play a role in filling micropores during the preparation and molding of the board, thereby improving the compactness and density of the material, thereby improving the overall hardness performance of the decorative board. The present invention adds straw as the main raw material of the additive into the preparation process. The straw is taken from natural recycled materials. After recycling, the utilization rate of resources can be improved. Moreover, its decomposition products are all natural substances with good biodegradability. It can reduce the pollution caused to the environment after the decorative panels are discarded, thus meeting the needs of environmental protection.

[0019] The raw materials used in the present invention are all commercially available raw materials.

[0020] Example 1: A process for preparing an environmentally friendly decorative board, characterized by comprising the following steps: S1: Mix the main raw materials and set aside; The main raw materials are composed of the following raw materials by weight: 90 parts of polyvinyl chloride resin, 25 parts of inorganic filler, 10 parts of wood cellulose, 6 parts of dispersant, 6 parts of foaming agent and 4 parts of flame retardant; The dispersant is polyphosphate and the foaming agent is ammonium carbonate; Aluminum hydroxide is used as flame retardant; S2: prepare the additives for use; The additive is composed of the following raw materials in parts by weight: 20 parts of modified straw fiber, 15 parts of inorganic filler, 10 parts of vermiculite powder, 8 parts of mica powder and 3 parts of activated carbon powder; Modified straw fiber is prepared by the following steps: Step 1: Get straw material, rinse the straw three times and dry it, cut it into 3mm small segments, put it into a grinder for grinding, sieve it after grinding to obtain straw powder, and set aside; Step 2: Add sodium hydroxide solution with a mass of 15% of the mass of the straw powder to the straw powder, soak for 5 hours, then add deionized water with a mass of 8% of the mass of the straw powder, stir and mix to obtain a soaking solution for standby use; Step 3: Add 8% of the mass of the soaking liquid to the soaking liquid with anhydrous ethanol, stir and mix, and soak for 40 minutes. After soaking, put it into an oven and set it to 85°C for drying for 5 hours. After taking it out, put it into a hot press and set it to 220°C for preheating for 1.5 minutes. After the preheating, set it to hot press at 5 MPa for 2 minutes. After taking it out, cut it into small pieces, grind it, and sieve it to obtain modified straw fiber. The particle size of modified straw fiber is ≤75μm; The additive is prepared by the following method: modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and put into a mixer, set to medium-low speed and mixed for 5 minutes, and after the mixing is completed, put into an oven and set to 60°C for drying for 20 minutes to obtain the additive; Vermiculite powder is prepared by the following method: selecting vermiculite raw materials, performing high-temperature roasting, grinding, and screening to obtain powder raw materials, adding a pure acrylic emulsion with a mass ratio of 4% of the mass of the vermiculite raw materials to the powder raw materials, sending the powder raw materials into a mixer and stirring at high speed for 35 minutes, filtering the powder raw materials after the mixing is completed, and sending the powder raw materials into a vacuum drying oven for treatment to obtain the vermiculite powder; Vermiculite powder grinding particle size ≤ 100μm; S3: The main raw material and the additive are sequentially fed into a kneader for processing, and the decorative board is obtained after being taken out and cut; The processing method in step S3 is as follows: polyvinyl chloride resin, inorganic filler, wood cellulose, dispersant, foaming agent and flame retardant are weighed as needed and added to a kneader, and the kneader is processed for 20 minutes, and then modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and added to the kneader, and the processing is continued for 15 minutes to obtain a mixture, and the mixture is placed in a mold. A foaming agent heating plate is added to the mold, and the temperature is set to 180°C. The heat preservation treatment is carried out for 15 minutes, and then it is cooled to room temperature. The mold is opened to obtain a foamed board, and the foamed board is sent to an oven, set to 75°C and dried for 4 hours. After taking it out, wait for it to cool to room temperature, and cut it as needed to obtain a decorative board.

[0021] Example 2: A process for preparing an environmentally friendly decorative board, characterized by comprising the following steps: S1: Mix the main raw materials and set aside; The main raw materials are composed of the following raw materials in parts by weight: 100 parts of polyvinyl chloride resin, 30 parts of inorganic filler, 12 parts of wood cellulose, 7 parts of dispersant, 7 parts of foaming agent and 5 parts of flame retardant; Sodium tripolyphosphate is used as dispersant and ammonium bicarbonate is used as foaming agent; The flame retardant is phosphate ester; S2: prepare the additives for use; The additive is composed of the following raw materials in parts by weight: 25 parts of modified straw fiber, 17 parts of inorganic filler, 12 parts of vermiculite powder, 9 parts of mica powder and 4 parts of activated carbon powder; Modified straw fiber is prepared by the following steps: Step 1: Get straw material, rinse the straw 4 times and dry it, cut it into 4mm small segments, put it into a grinder for grinding, sieve it after grinding to obtain straw powder, and set aside; Step 2: Add sodium hydroxide solution with a mass of 17% of the straw powder to the straw powder, soak for 6 hours, then add deionized water with a mass of 9% of the straw powder, stir and mix to obtain a soaking solution for standby use; Step 3: Add anhydrous ethanol with a mass of 9% of the mass of the soaking liquid to the soaking liquid, stir and mix, and soak for 45 minutes. After soaking, put it into an oven and set it to 90°C for drying for 6 hours. After taking it out, put it into a hot press and set it to 220°C for preheating for 1.5 minutes. After the preheating, set it to hot press at 6 MPa for 2.5 minutes. After taking it out, cut it into small pieces, grind it, and sieve it to obtain modified straw fiber; The particle size of modified straw fiber is ≤75μm; The additive is prepared by the following method: modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and put into a mixer, set to medium-low speed and mixed for 6 minutes, and after the mixing is completed, put into an oven and set to 65°C for drying for 25 minutes to obtain the additive; Vermiculite powder is prepared by the following method: selecting vermiculite raw materials, performing high-temperature roasting, grinding, and screening to obtain a powder raw material, adding a pure acrylic emulsion with a mass ratio of 5% of the mass of the vermiculite raw materials to the powder raw material, feeding the powder raw material into a mixer and stirring at high speed for 37 minutes, filtering the powder raw material after the mixing is completed, and feeding the powder raw material into a vacuum drying oven for treatment to obtain the vermiculite powder; Vermiculite powder grinding particle size ≤ 100μm; S3: The main raw material and the additive are sequentially fed into a kneader for processing, and the decorative board is obtained after being taken out and cut; The processing method in step S3 is as follows: polyvinyl chloride resin, inorganic filler, wood cellulose, dispersant, foaming agent and flame retardant are weighed as needed and added to a kneader, and the kneader is processed for 25 minutes. After that, modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and added to the kneader, and the processing is continued for 17 minutes to obtain a mixture, and the mixture is placed in a mold. A foaming agent heating plate is added to the mold, and the temperature is set to 185°C. The heat preservation treatment is carried out for 17 minutes, and then cooled to room temperature. The mold is opened to obtain a foamed board, and the foamed board is sent to an oven, set to 77°C and dried for 4.5 hours. After taking it out, wait for it to cool to room temperature, and cut it as needed to obtain a decorative board.

[0022] Example 3: A process for preparing an environmentally friendly decorative board, characterized by comprising the following steps: S1: Mix the main raw materials and set aside; The main raw materials are composed of the following raw materials in parts by weight: 110 parts of polyvinyl chloride resin, 35 parts of inorganic filler, 15 parts of wood cellulose, 8 parts of dispersant, 8 parts of foaming agent and 6 parts of flame retardant; Alkylbenzene sulfonate is used as dispersant and ammonium nitrite is used as foaming agent; The flame retardant is magnesium hydroxide; S2: prepare the additives for use; The additive is composed of the following raw materials in parts by weight: 30 parts of modified straw fiber, 20 parts of inorganic filler, 15 parts of vermiculite powder, 10 parts of mica powder and 5 parts of activated carbon powder; Modified straw fiber is prepared by the following steps: Step 1: Get straw material, rinse the straw 5 times and dry it, cut it into 5mm small segments, put it into a grinder for grinding, sieve it after grinding to obtain straw powder, and set aside; Step 2: Add sodium hydroxide solution with a mass of 20% of the mass of the straw powder to the straw powder, soak for 8 hours, then add deionized water with a mass of 10% of the mass of the straw powder, stir and mix to obtain a soaking solution for standby use; Step 3: Add anhydrous ethanol with a mass of 10% of the mass of the soaking liquid to the soaking liquid, stir and mix, and soak for 50 minutes. After soaking, put it into an oven and set it to 95°C for drying for 8 hours. After taking it out, put it into a hot press and set it to 220°C for preheating for 1.5 minutes. After the preheating, set it to hot press at 7 MPa for 3 minutes. After taking it out, cut it into small pieces, grind it, and sieve it to obtain modified straw fiber; The particle size of modified straw fiber is ≤75μm; The additive is prepared by the following method: modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and put into a mixer, set to medium-low speed and mixed for 8 minutes, and after the mixing is completed, put into an oven and set to 70°C for drying for 30 minutes to obtain the additive; Vermiculite powder is prepared by the following method: selecting vermiculite raw materials, performing high-temperature roasting, grinding, and screening to obtain powder raw materials, adding a pure acrylic emulsion with a mass ratio of 6% of the mass of the vermiculite raw materials to the powder raw materials, sending the powder raw materials into a mixer and stirring at high speed for 40 minutes, filtering the powder raw materials after the mixing is completed, and sending the powder raw materials into a vacuum drying oven for treatment to obtain the vermiculite powder; Vermiculite powder grinding particle size ≤ 100μm; S3: The main raw material and the additive are sequentially fed into a kneader for processing, and the decorative board is obtained after being taken out and cut; The processing method in step S3 is as follows: polyvinyl chloride resin, inorganic filler, wood cellulose, dispersant, foaming agent and flame retardant are weighed as needed and added to a kneader, and the kneader is processed for 30 minutes. Then, modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and added to the kneader, and the processing is continued for 20 minutes to obtain a mixture, and the mixture is placed in a mold. A foaming agent heating plate is added to the mold, and the temperature is set to 190°C. The heat preservation treatment is carried out for 20 minutes, and then it is cooled to room temperature. The mold is opened to obtain a foamed board, and the foamed board is sent to an oven, set to 80°C and dried for 5 hours. After taking it out, wait for it to cool to room temperature, and cut it as needed to obtain a decorative board.

[0023] Comparative Example 1: The difference between this comparative example and Example 1 is that: In this comparative example, straw powder was used instead of modified straw fiber, and other method steps were the same as those in Example 1.

[0024] Comparative Example 2: The difference between this comparative example and Example 1 is that: This comparative example does not contain modified straw fiber, and other method steps are the same as Example 1.

[0025] Comparative Example 3: The difference between this comparative example and Example 1 is that: In this comparative example, the straw powder was not soaked, and other steps were the same as those in Example 1.

[0026] Comparative Example 4: The difference between this comparative example and Example 1 is that: This comparative example does not contain vermiculite powder, and other method steps are the same as Example 1.

[0027] Performance test: The relevant performances of the decorative board samples provided in Examples 1 to 3 and Comparative Examples 1 to 4 were tested respectively; The test results are recorded in the following table:

[0028] By comparing and analyzing the relevant data in the table, it can be seen that the environmentally friendly decorative board prepared by the present invention not only has good strength properties, but also has excellent hardness properties. This shows that the preparation process of the environmentally friendly decorative board provided by the present invention has a broader market prospect and is more suitable for promotion.

[0029] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

[0031] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention to solve substantially the same technical problems and achieve substantially the same technical effects are all included in the scope of protection of the present invention.

Claims

1. A process for preparing an environmentally friendly decorative board, characterized in that: The following steps are involved: S1: Mix the main raw materials and set aside; S2: prepare the additives for use; S3: The main raw material and the additive are sequentially fed into a kneader for processing, and the decorative board is obtained after being taken out and cut; The main raw materials are composed of the following raw materials in parts by weight: 90-110 parts of polyvinyl chloride resin, 25-35 parts of inorganic filler, 10-15 parts of wood cellulose, 6-8 parts of dispersant, 6-8 parts of foaming agent and 4-6 parts of flame retardant; The additive is composed of the following raw materials in parts by weight: 20 to 30 parts of modified straw fiber, 15 to 20 parts of inorganic filler, 10 to 15 parts of vermiculite powder, 8 to 10 parts of mica powder and 3 to 5 parts of activated carbon powder.

2. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The modified straw fiber is prepared by the following steps: Step 1: Obtain straw material, rinse the straw 3-5 times and dry it, cut it into small pieces of 3-5 mm, add it into a grinder for grinding, sieve it after grinding to obtain straw powder, and set aside; Step 2: Add sodium hydroxide solution with a mass of 15-20% of the mass of the straw powder to the straw powder, soak for 5-8 hours, then add deionized water with a mass of 8-10% of the mass of the straw powder, stir and mix to obtain a soaking solution for standby use; Step 3: Add 8-10% of the mass of the soaking liquid to the soaking liquid with anhydrous ethanol, stir and mix, and soak for 40-50 minutes. After soaking, put it into an oven and set it to 85-95℃ for drying for 5-8 hours. After taking it out, put it into a hot press and set it to 220℃ for preheating for 1.5 minutes. After the preheating, set it to 5-7Mpa for hot pressing for 2-3 minutes. After taking it out, cut it into small pieces, grind it, and sieve it to obtain modified straw fiber.

3. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The additive is prepared by the following method: modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder are weighed as needed and put into a mixer, set to medium-low speed for mixing for 5-8 minutes, and after mixing, put into an oven and set to 60-70° C. for drying for 20-30 minutes to obtain the additive.

4. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The dispersant is selected from any one of polyphosphate, sodium tripolyphosphate, and alkylbenzene sulfonate, and the foaming agent is selected from any one of ammonium carbonate, ammonium bicarbonate, and ammonium nitrite.

5. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The flame retardant is selected from any one of aluminum hydroxide, phosphate ester and magnesium hydroxide.

6. The process for preparing an environmentally friendly decorative board according to claim 2, characterized in that: The modified straw fiber grinding particle size is ≤75 μm.

7. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The vermiculite powder is prepared by the following method: selecting a vermiculite raw material, performing high-temperature roasting, grinding, and screening to obtain a powder raw material, adding a pure acrylic emulsion with a mass accounting for 4-6% of the mass of the vermiculite raw material to the powder raw material, sending the powder raw material into a mixer and stirring at a high speed for 35-40 minutes, filtering the powder raw material after the mixing is completed, and sending the powder raw material into a vacuum drying oven for treatment to obtain the vermiculite powder.

8. The process for preparing an environmentally friendly decorative board according to claim 7, characterized in that: The vermiculite powder has a grinding particle size of ≤100 μm.

9. The process for preparing an environmentally friendly decorative board according to claim 1, characterized in that: The processing method in step S3 is: weighing polyvinyl chloride resin, inorganic filler, wood cellulose, dispersant, foaming agent and flame retardant as needed, adding them to a kneader, and kneading for 20 to 30 minutes, then weighing modified straw fiber, inorganic filler, vermiculite powder, mica powder and activated carbon powder as needed, adding them to the kneader, and continuing to process for 15 to 20 minutes to obtain a mixture.

10. The process for preparing an environmentally friendly decorative board according to claim 9, characterized in that: Put the mixture into a mold, add a foaming agent heating plate to the mold, set the temperature to 180-190℃, keep warm for 15-20 minutes, then cool to room temperature, open the mold to obtain a foamed board, send the foamed board into an oven, set it to 75-80℃ and dry it for 4-5 hours, take it out and wait for it to cool to room temperature, and cut it as needed to obtain a decorative board.

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