Flame-retardant antibacterial sound-insulation composite fiberboard and preparation method thereof

Abstract

The invention relates to the technical field of fiberboards, in particular to a flame-retardant antibacterial sound-insulation composite fiberboard and a preparation method thereof.The flame-retardant antibacterial sound-insulation composite fiberboard comprises a base core layer, an antibacterial filling layer is fixedly connected to the side face of one side of the base core layer, and a flame-retardant reinforcing layer is fixedly connected to the side face of the other side of the base core layer; the flame-retardant reinforcing layer and the antibacterial filling layer are fixedly connected with the base core layer through ultrasonic welding, a first sound insulation film and a second sound insulation film are fixed to the flame-retardant reinforcing layer and the antibacterial filling layer respectively, a high-temperature-resistant reinforcing layer is fixedly connected to the first sound insulation film, and a waterproof and damp-proof layer is fixedly connected to the second sound insulation film. The high-temperature-resistant reinforcing layer and the waterproof and damp-proof layer are fixedly connected with the first sound insulation film and the second sound insulation film through high-temperature hot melting, and the base core layer is formed by hot pressing of a polypropylene fiber material. The flame-retardant, antibacterial and sound-insulation composite material not only has excellent flame-retardant, antibacterial and sound-insulation characteristics, but also has good weather resistance and durability, and is wide in application range.

Description

Technical Field

[0001] The invention relates to the technical field of fiberboards, and in particular to a flame-retardant, antibacterial and sound-insulating composite fiberboard and a preparation method thereof. Background Art

[0002] Composite fiberboard is a board made by mixing natural fiber and synthetic resin in a certain proportion, and then going through a series of processes such as crushing, drying, mixing glue, paving, pre-pressing and high temperature and high pressure molding. This board has excellent properties such as moisture resistance, fire resistance, wear resistance, and no deformation, and is light in texture and high in strength. Due to its unique combination of properties, composite fiberboard is widely used in many fields such as construction, furniture, and packaging.

[0003] However, existing composite fiberboards are prepared by a layered paving method. When used, they have poor strength, low weather resistance and durability. After long-term use, the flame retardant, antibacterial and sound insulation properties are easily affected, and there are certain disadvantages in the use process.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] In order to overcome the technical defects of the prior art, the present invention provides a flame retardant, antibacterial and sound insulating composite fiberboard and a preparation method thereof, which not only has excellent flame retardant, antibacterial and sound insulating properties, but also has good weather resistance and durability, and has a wide range of applications.

[0006] The technical solution adopted by the present invention is: it includes a base core layer, the antibacterial filling layer is fixedly connected to the side surface of one side of the base core layer, the flame retardant reinforcement layer is fixedly connected to the side surface of the other side of the base core layer, the flame retardant reinforcement layer and the antibacterial filling layer are fixedly connected to the base core layer by ultrasonic welding, the first sound insulation membrane and the second sound insulation membrane are fixedly connected to the flame retardant reinforcement layer and the antibacterial filling layer respectively, the first sound insulation membrane is fixedly connected to the high temperature resistant reinforcement layer, the second sound insulation membrane is fixedly connected to the waterproof and moisture-proof layer, the high temperature resistant reinforcement layer and the waterproof and moisture-proof layer are fixedly connected to the first sound insulation membrane and the second sound insulation membrane by high-temperature hot melting.

[0007] Preferably, in order to make use of the excellent physical properties of polypropylene fibers so that the fiberboard as a whole has the characteristics of high strength, wear resistance, corrosion resistance and light weight, the base core layer is hot-pressed from polypropylene fiber material.

[0008] Preferably, in order to provide long-lasting antibacterial and deodorizing functions while ensuring air permeability, the antibacterial filling layer includes the filling base plate, the square filling groove is laser-engraved on the filling base plate, the square filling groove is filled with a mixture of antibacterial agent and activated carbon, and the breathable membrane is fixedly attached to the filling base plate, and the breathable membrane is used to seal the square filling groove.

[0009] Preferably, in order to enhance the overall flame retardant properties of the fiberboard, effectively prevent the spread of fire, and improve the safety of the fiberboard, the flame retardant reinforcement layer includes the attachment core board, the attachment core board is evenly provided with the attachment holes and grooves, and the attachment holes and grooves are filled with flame retardants.

[0010] Preferably, in order to enable the fiberboard to have excellent sound insulation effect and effectively block the propagation of noise, the first sound insulation membrane and the second sound insulation membrane are both pressed and formed by carbon fiber, carbon powder and graphite powder materials.

[0011] Preferably, in order to make the fiberboard have excellent high temperature resistance, enhance the stability and durability of the structure, and be suitable for application in high temperature environment, the high temperature resistant reinforcement layer is made of glass fiber.

[0012] Preferably, in order to form an efficient waterproof and moisture-proof barrier, the waterproof and moisture-proof layer includes a polyethylene film and a polyvinyl chloride film, and the polyethylene film and the polyvinyl chloride film are fixedly attached and connected.

[0013] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0014] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form the base core layer;

[0015] Step 2: prepare the filling base plate, and laser engrave the square filling groove on the filling base plate, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove, and then fix the breathable film to close the filling groove, wherein the antibacterial agent and activated carbon account for 20%-28% and 65%-80% respectively;

[0016] Step 3: preparing the attachment core board, and evenly opening the attachment holes and grooves thereon, and filling the attachment holes and grooves with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 28%-32%, 35%-43% and 38%-45%;

[0017] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer and the flame retardant reinforcement layer on both sides of the base core layer, wherein the amplitude of ultrasonic welding is 30%-85%, the welding time is 0.1s-1.5s, and the welding frequency is 12KHz-15KHz;

[0018] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain the first sound insulation membrane and the second sound insulation membrane, hot press the first sound insulation membrane and the second sound insulation membrane on the flame retardant reinforcement layer and the antibacterial filling layer, and at the same time make the high temperature resistant reinforcement layer and the waterproof and moisture-proof layer, and use hot melt to fix the high temperature resistant reinforcement layer and the waterproof and moisture-proof layer on the first sound insulation membrane and the second sound insulation membrane to form a composite fiber board as a whole.

[0019] The beneficial effects of the present invention are as follows: through ultrasonic welding technology, the flame retardant reinforcement layer and the antibacterial filling layer are tightly attached to the base core layer, ensuring the stability of the structure and the performance of the performance; through the first sound insulation membrane and the second sound insulation membrane, the sound insulation effect of the board is significantly improved, and the setting of the high temperature resistant reinforcement layer and the waterproof and moisture-proof layer further enhances the stability and moisture-proof performance of the board in a high temperature environment. It not only has excellent flame retardant, antibacterial and sound insulation properties, but also has good weather resistance and durability, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention.

[0022] Figure 3 It is a schematic diagram of the explosion structure of the present invention.

[0023] Figure 4 It is a schematic structural diagram of the antibacterial filling layer of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the flame retardant reinforcement layer of the present invention.

[0025] Figure 6 The following is a performance comparison table of the embodiments of the present invention and the comparative examples.

[0026] Explanation of the accompanying drawings: In the figure: 1, base core layer; 2, antibacterial filling layer; 201, filling bottom plate; 202, square filling groove; 203, breathable membrane; 3, flame retardant reinforcement layer; 301, attachment core plate; 302, attachment hole groove; 4, first sound insulation membrane; 5, second sound insulation membrane; 6, high temperature resistant reinforcement layer; 7, waterproof and moisture-proof layer. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] Embodiment 1

[0029] like Figure 1-Figure 6 As shown, this embodiment provides a flame retardant, antibacterial and sound insulating composite fiberboard, including a base core layer 1, an antibacterial filling layer 2 is fixedly connected to one side of the base core layer 1, the base core layer 1 serves as a core, one side of the base core layer 1 is firmly connected to the antibacterial filling layer 2, effectively inhibiting the growth of bacteria and keeping the environment clean, a flame retardant reinforcement layer 3 is fixedly connected to the other side of the base core layer 1, the flame retardant reinforcement layer 3 and the antibacterial filling layer 2 are fixedly connected to the base core layer 1 by ultrasonic welding, and the flame retardant reinforcement layer 3 uses advanced ultrasonic welding technology to ensure close bonding with the base core layer 1 The flame retardant performance of the whole is greatly improved. The flame retardant reinforcement layer 3 and the antibacterial filling layer 2 are respectively fixed with the first sound insulation film 4 and the second sound insulation film 5. The first sound insulation film 4 is fixedly connected with the high temperature resistant reinforcement layer 6. The second sound insulation film 5 is fixedly connected with the waterproof and moisture-proof layer 7. The high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 are fixedly connected with the first sound insulation film 4 and the second sound insulation film 5 by high temperature hot melting. In the actual application process, the flame retardant reinforcement layer 3 and the antibacterial filling layer 2 are also covered with the first sound insulation film 4 and the second sound insulation film 5, respectively, which effectively isolates the noise and creates a quiet space. Among them, a high temperature resistant reinforcement layer 6 is added above the first sound insulation film 4, which is fixed by high temperature hot melting technology, which enhances the stability of the board in high temperature environment. The second sound insulation film 5 is closely connected with the waterproof and moisture-proof layer 7, which provides all-round protection for the board and ensures that it can maintain excellent performance in various harsh environments.

[0030] The base core layer 1 is formed by hot pressing of polypropylene fiber material. The base core layer 1 of the composite board is made of polypropylene fiber material and is subjected to a hot pressing process to ensure that the structure is strong and lightweight. The antibacterial filling layer 2 includes a filling base plate 201, on which a square filling groove 202 is laser engraved, and the square filling groove 202 is filled with a mixture of an antibacterial agent and activated carbon. A breathable film 203 is fixedly attached to the filling base plate 201, and the breathable film 203 is used to seal the square filling groove 202, effectively inhibiting bacterial growth and absorbing odor. At the same time, the sealing of the breathable film 203 ensures the stability of the filler and maintains good air permeability. The flame retardant reinforcement layer 3 includes an attachment core plate 301, on which attachment holes 302 are evenly opened, and the attachment holes 302 are filled with flame retardants. By filling the attachment holes 302 evenly opened on the attachment core plate 301 with flame retardants, the flame retardant performance of the board is significantly improved. The first sound insulation membrane 4 and the second sound insulation membrane 5 are both formed by pressing carbon fiber, carbon powder and graphite powder. The high temperature resistant reinforcement layer 6 is made of glass fiber. The waterproof and moisture-proof layer 7 includes a polyethylene film and a polyvinyl chloride film, which are fixedly bonded and connected. The first sound insulation membrane 4 and the second sound insulation membrane 5 are both made of carbon fiber, carbon powder and graphite powder, and have outstanding sound insulation effect. The high temperature resistant reinforcement layer 6 is made of glass fiber, which provides the board with excellent high temperature resistance. The waterproof and moisture-proof layer 7 builds a solid waterproof and moisture-proof barrier for the board by fixing and bonding the polyethylene film and the polyvinyl chloride film.

[0031] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0032] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0033] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 20% and 65% respectively;

[0034] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 28%, 35% and 38% respectively;

[0035] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 30%, the welding time is 0.1s, and the welding frequency is 12KHz;

[0036] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0037] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are relatively good.

[0038] Embodiment 2

[0039] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0040] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0041] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 22% and 68% respectively;

[0042] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 29%, 37% and 39% respectively;

[0043] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 40%, the welding time is 0.6s, and the welding frequency is 13KHz;

[0044] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0045] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are relatively good.

[0046] Embodiment 3

[0047] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0048] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0049] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 24% and 72% respectively;

[0050] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 30%, 39% and 52% respectively;

[0051] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 60%, the welding time is 0.9s, and the welding frequency is 14KHz;

[0052] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0053] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are relatively good.

[0054] Embodiment 4

[0055] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0056] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0057] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 26% and 74% respectively;

[0058] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 31%, 40% and 43% respectively;

[0059] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 80%, the welding time is 1.1s, and the welding frequency is 14KHz;

[0060] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0061] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are relatively good.

[0062] Embodiment 5

[0063] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0064] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0065] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 28% and 80% respectively;

[0066] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 32%, 43% and 45% respectively;

[0067] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 85%, the welding time is 1.5s, and the welding frequency is 15KHz;

[0068] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0069] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are relatively good.

[0070] Comparative Example 1

[0071] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0072] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0073] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 18% and 60% respectively;

[0074] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 25%, 32% and 32% respectively;

[0075] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 20%, the welding time is 0.08s, and the welding frequency is 10KHz;

[0076] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0077] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are average.

[0078] Comparative Example 2

[0079] A method for preparing a flame-retardant, antibacterial and sound-insulating composite fiberboard comprises the following steps:

[0080] Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing to form a base core layer 1;

[0081] Step 2: prepare a filling base plate 201, and laser engrave a square filling groove 202 on the filling base plate 201, mix the antibacterial agent and activated carbon and evenly fill them into the square filling groove 202, and then fix and attach the breathable membrane 203 to close the filling groove, wherein the antibacterial agent and activated carbon account for 31% and 85% respectively;

[0082] Step 3: prepare an attachment core board 301, and evenly open attachment holes 302 thereon, and fill the attachment holes 302 with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 36%, 46% and 47% respectively;

[0083] Step 4: Use ultrasonic welding technology to fix the antibacterial filling layer 2 and the flame retardant reinforcement layer 3 on both sides of the base core layer 1, wherein the amplitude of ultrasonic welding is 90%, the welding time is 1.7s, and the welding frequency is 17KHz;

[0084] Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials for compression molding to obtain a first sound insulation membrane 4 and a second sound insulation membrane 5, and hot-press the first sound insulation membrane 4 and the second sound insulation membrane 5 to fix them on the flame retardant reinforcement layer 3 and the antibacterial filling layer 2, and at the same time make a high temperature resistant reinforcement layer 6 and a waterproof and moisture-proof layer 7, and fix the high temperature resistant reinforcement layer 6 and the waterproof and moisture-proof layer 7 on the first sound insulation membrane 4 and the second sound insulation membrane 5 by hot melting to form a composite fiberboard as a whole.

[0085] After testing, the flame retardant, antibacterial and sound insulation effects of the composite fiberboard are average.

[0086] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A flame retardant, antibacterial and sound insulating composite fiberboard, comprising a base core layer (1), characterized in that: An antibacterial filling layer (2) is fixedly connected to the side surface of one side of the base core layer (1), and a flame retardant reinforcement layer (3) is fixedly connected to the side surface of the other side of the base core layer (1); the flame retardant reinforcement layer (3) and the antibacterial filling layer (2) are fixedly connected to the base core layer (1) by ultrasonic welding; a first sound insulation membrane (4) and a second sound insulation membrane (5) are fixedly connected to the flame retardant reinforcement layer (3) and the antibacterial filling layer (2), respectively; a high temperature resistant reinforcement layer (6) is fixedly connected to the first sound insulation membrane (4), and a waterproof and moisture-proof layer (7) is fixedly connected to the second sound insulation membrane (5); the high temperature resistant reinforcement layer (6) and the waterproof and moisture-proof layer (7) are fixedly connected to the first sound insulation membrane (4) and the second sound insulation membrane (5) by high temperature hot melting.

2. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The base core layer (1) is formed by hot pressing of polypropylene fiber material.

3. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The antibacterial filling layer (2) comprises a filling base plate (201), a square filling groove (202) is laser-engraved on the filling base plate (201), the square filling groove (202) is filled with a mixture of an antibacterial agent and activated carbon, and a breathable membrane (203) is fixedly attached to the filling base plate (201), and the breathable membrane (203) is used to seal the square filling groove (202).

4. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The flame retardant reinforcement layer (3) comprises an attachment core plate (301), the attachment core plate (301) is evenly provided with attachment holes (302), and the attachment holes (302) are filled with a flame retardant.

5. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The first sound insulation membrane (4) and the second sound insulation membrane (5) are both formed by pressing carbon fiber, carbon powder and graphite powder materials.

6. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The high temperature resistant reinforcement layer (6) is made of glass fiber.

7. The flame retardant, antibacterial and sound insulating composite fiberboard according to claim 1, characterized in that: The waterproof and moisture-proof layer (7) comprises a polyethylene film and a polyvinyl chloride film, and the polyethylene film and the polyvinyl chloride film are fixedly attached and connected.

8. A method for preparing a flame retardant, antibacterial and sound insulating composite fiberboard, according to the flame retardant, antibacterial and sound insulating composite fiberboard according to any one of claims 1 to 7, characterized in that: The steps include: Step 1: Select polypropylene fiber as the main raw material, put it into a mold after pretreatment, and perform hot pressing molding to form the base core layer (1); Step 2: preparing the filling base plate (201), and laser engraving the square filling groove (202) on the filling base plate (201), mixing the antibacterial agent and activated carbon and uniformly filling them into the square filling groove (202), and then fixing and attaching the breathable membrane (203) to close the filling groove, wherein the antibacterial agent and activated carbon account for 20%-28% and 65%-80% respectively; Step 3: preparing the attachment core plate (301), and evenly opening the attachment holes (302) thereon, and filling the attachment holes (302) with a flame retardant, wherein the flame retardant is composed of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin, and the proportions of magnesium hydroxide, aluminum hydroxide and chlorinated paraffin in the flame retardant are 28%-32%, 35%-43% and 38%-45% respectively; Step 4: Using ultrasonic welding technology, the antibacterial filling layer (2) and the flame retardant reinforcement layer (3) are fixedly connected to the two sides of the base core layer (1), wherein the amplitude of ultrasonic welding is 30%-85%, the welding time is 0.1s-1.5s, and the welding frequency is 12KHz-15KHz; Step 5: Take equal weight portions of carbon fiber, carbon powder and graphite powder materials and press them into shape to obtain the first sound insulation membrane (4) and the second sound insulation membrane (5), and hot-press the first sound insulation membrane (4) and the second sound insulation membrane (5) onto the flame retardant reinforcement layer (3) and the antibacterial filling layer (2), and at the same time, prepare the high temperature resistant reinforcement layer (6) and the waterproof and moisture-proof layer (7), and fix the high temperature resistant reinforcement layer (6) and the waterproof and moisture-proof layer (7) onto the first sound insulation membrane (4) and the second sound insulation membrane (5) by hot melting to form a composite fiberboard as a whole.

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