Soundproof wallboard and process for its preparation

Abstract

The application discloses a sound insulation wallboard and a preparation process thereof, and relates to the technical field of building decoration products. The sound insulation wallboard comprises a PET wear-resistant layer, a PET decorative layer, a first carrier layer, a buffer layer, a PET foamed substrate layer and a back film layer which are sequentially arranged in a thickness direction; and the buffer layer is a porous structure and / or a reticular structure. The sound insulation wallboard has the structural design, the first carrier layer, the buffer layer and the PET foamed substrate layer are arranged, a micro-foamed floor can be formed, the buffer layer is a porous structure and / or a reticular structure, noise can be reflected and refracted for multiple times, sound can be attenuated and a sound wave propagation path can be prolonged, and therefore, the propagation of noise can be reduced.

Description

Technical Field

[0001] This invention relates to the field of building decoration product technology, and more specifically, to a soundproof wall panel and its manufacturing process. Background Technology Wall panels are a common decorative material widely used in various locations. With the improvement of people's living standards, customers have increasingly higher requirements for wall panels, going beyond just aesthetics and lightweight design to include sound insulation and noise reduction for various scenarios. PET flooring is a relatively new type of flooring in the industry, similar in properties to SPC flooring. However, SPC flooring achieves significant weight reduction through mature micro-foaming technology, reducing its weight by 15-25% while retaining its performance and texture, making it very popular with customers and with a promising market prospect. However, the current flooring market does not yet offer micro-foamed PET sound-insulating flooring. To meet customer needs, this invention provides a micro-foamed PET sound-insulating wall panel and its manufacturing process, satisfying market demands. Summary of the Invention

[0002] The present invention aims to provide, for example, a soundproof wall panel and its manufacturing process, which enables noise to be attenuated and its propagation path to be extended through multiple reflections and refractions, thereby reducing the propagation of noise.

[0003] The embodiments of the present invention can be implemented as follows: In a first aspect, this application provides a soundproof wall panel, comprising: a PET wear-resistant layer, a PET decorative layer, a first carrier layer, a buffer layer, a PET foam substrate layer and a backing film layer stacked sequentially along the thickness direction; wherein the buffer layer has a porous structure and / or a mesh structure.

[0004] In the above technical solution, by setting the first carrier layer, the buffer layer and the PET foam substrate layer, a micro-foamed floor can be formed. The buffer layer has a porous structure and / or a mesh structure, which can reduce the propagation of noise by allowing noise to be reflected and refracted multiple times, attenuating the sound and extending the sound wave propagation path.

[0005] In optional embodiments, the porous structure includes a closed-cell porous structure, a semi-closed-cell porous structure, and an open-cell porous structure; the mesh structure includes a honeycomb structure and a mesh stacking structure.

[0006] In the above technical solutions, these structures can all reflect and refract noise multiple times in order to reduce noise transmission.

[0007] In an optional embodiment, the porous structure is made of one or more of the following: polyolefin foam, expanded polystyrene, expanded polypropylene, expanded rubber, expanded ethylene vinyl acetate, expanded ethylene, expanded polyethylene, ethylene-vinyl acetate copolymer, irradiated crosslinked polyethylene, polypropylene, compressible natural materials, and expanded polystyrene; the network structure is made of one or more of the following: ethylene-vinyl acetate copolymer, irradiated crosslinked polyethylene, expanded polypropylene, and expanded polystyrene.

[0008] In the above technical solutions, the buffer layer formed by these materials can have the aforementioned porous structure and / or mesh structure, so that the buffer layer reduces the propagation of noise.

[0009] In an optional embodiment, the first carrier layer is one or more of the following: high-density fiberboard layer, wood-plastic composite material layer, polyvinyl chloride resin layer, and high-end vinyl layer.

[0010] In an optional embodiment, the PET foam substrate layer comprises, by weight percentage, 30%-45% PET, 50%... 60% CaCO3, 2% 6% lubricant and 4% 7% PET toughening agent.

[0011] In an optional embodiment, the back film layer is made of electron radiation cross-linked polyethylene foam.

[0012] In an optional embodiment, one end of the soundproof wall panel is provided with a panel lock, and the opposite end is provided with a panel buckle. The panel buckle of one soundproof wall panel can be spliced ​​with the panel lock of an adjacent soundproof wall panel.

[0013] Secondly, this application provides a manufacturing process for a soundproof wall panel, comprising: S01: Hot-press the PET decorative layer, the PET wear-resistant layer, and the first carrier layer into a surface layer; S02: Extruding a PET foam substrate to form the PET foam substrate layer; S03: UV temper the surface layer; S04: Press the surface layer, the buffer layer, the PET foam substrate layer, and the back film layer together; S05: Cutting, grooving.

[0014] In the above technical solution, the sound insulation wall panel is prepared by layering and pressing in stages, which can improve the performance of the sound insulation wall panel, reduce the transmission of noise, and increase its strength.

[0015] In an optional implementation, in step S01, the press pressure is between 1.5-2.5 MPa, and the hot pressing temperature has 5 segments: 60-70℃, 90-100℃, 150-170℃, 110-120℃, and 60-70℃, with a total time of 2-3 hours.

[0016] In the above technical solution, the hot pressing process can make the surface layer more firmly bonded, so that it can be bonded to other layers in the future to obtain a sound insulation wall panel with higher strength.

[0017] In an optional embodiment, in step S02, the raw materials are first mixed according to the raw material preparation ratio of the PET foamed substrate layer, and kept at a temperature between 160-190°C for more than 3 hours. Then, single-screw extrusion is performed, followed by foaming using supercritical CO2 foaming technology, and then twin-screw extrusion. The PET foamed substrate layer is then shaped on a cooling table, wherein the density of the PET foamed substrate layer is 1.0-1.2 g / cm³. 3 between.

[0018] In the above technical solution, by combining the material composition of the aforementioned PET foam substrate layer with the aforementioned preparation process, the performance of the material can be improved.

[0019] In an optional embodiment, in step S03, a UV paint is formed on the surface layer, the tempering temperature is 85-95°C, and after tempering, the surface layer is cured at 20-25°C for more than 24 hours.

[0020] In an optional embodiment, in step S04, cold glue AB glue is used, with a glue volume of 60-70 g / cm³. 3 Between these steps, the buffer layer is bonded to the PET foam substrate layer, and then the material enters a cold press with a pressure of not less than 100t and a time of ≥6h. Use cold glue (AB type) with a glue volume of 60-70g / cm². 3 Between these steps, the surface layer is then bonded to the buffer layer, and then it enters a cold press with a pressure of not less than 100t and a time of ≥6h.

[0021] The beneficial effects of the embodiments of the present invention include, for example: By setting the first carrier layer, the buffer layer and the PET foam substrate layer, a micro-foamed floor can be formed. The buffer layer has a porous structure and / or a mesh structure, which can reduce the propagation of noise by allowing noise to be reflected and refracted multiple times, attenuating the sound and extending the sound wave propagation path. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the layer structure of the soundproof wall panel provided in the embodiments of this application; Figure 2 This is a structural schematic diagram of the soundproof wall panel provided in an embodiment of this application.

[0024] Icons: 1-UV paint; 2-PET wear-resistant layer; 3-PET decorative layer; 4-first carrier layer; 5-buffer layer; 6-PET foam substrate layer; 7-back film layer; 8-plate lock; 9-plate buckle. Detailed Implementation

[0025] 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0027] The "range" disclosed in this application is defined by a lower limit and an upper limit. A given range is defined by selecting a lower limit and an upper limit, which define the boundaries of a particular range. Ranges defined in this way can include or exclude endpoints and can be arbitrarily combined; that is, any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60~120 and 80~110 are listed for a specific parameter, it is also expected that ranges of 60~110 and 80~120 are also included. Furthermore, if minimum range values ​​of 1 and 2 are listed, and if maximum range values ​​of 3, 4, and 5 are listed, then the following ranges are all expected: 1~3, 1~4, 1~5, 2~3, 2~4, and 2~5. In this application, unless otherwise stated, the numerical range "a~b" represents a shortened representation of any combination of real numbers between a and b, where a and b are real numbers. For example, the numerical range "0~5" indicates that all real numbers between "0~5" have been listed in this article; "0~5" is simply a shortened representation of these numerical combinations. Furthermore, when a parameter is stated as an integer ≥2, it is equivalent to disclosing that the parameter is, for example, an integer such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0028] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0029] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0030] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, if the method includes steps (a) and (b), it means that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, if the method may also include step (c), it means that step (c) may be added to the method in any order. For example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0031] Figure 1 This is a schematic diagram of the layer structure of the soundproof wall panel provided in the embodiments of this application; Figure 2 This is a structural schematic diagram of the soundproof wall panel provided in an embodiment of this application. Please refer to [link / reference]. Figure 1 and Figure 2 This application provides a soundproof wall panel, comprising: a PET wear-resistant layer 2, a PET decorative layer 3, a first carrier layer 4, a buffer layer 5, a PET foamed substrate layer 6, and a back film layer 7, which are stacked sequentially along the thickness direction; wherein the buffer layer 5 has a porous structure and / or a mesh structure.

[0032] The soundproof wall panel provided in this application, through the arrangement of the first carrier layer 4, the buffer layer 5 and the PET foam substrate layer 6, can form a micro-foamed floor. Furthermore, the buffer layer 5 has a porous structure and / or a mesh structure, which can cause noise to undergo multiple reflections and refractions, attenuating sound and extending the sound wave propagation path, thereby reducing the propagation of noise.

[0033] Optionally, the total thickness of the soundproof wall panel is between 6.0 and 10.0 mm. As an example, the total thickness of the soundproof wall panel is 6.0 mm, 7 mm, 8 mm, 9 mm, or 10.0 mm, or any value within the range thereof.

[0034] In some embodiments, the porous structure includes a closed-cell porous structure, a semi-closed-cell porous structure, and an open-cell porous structure; the mesh structure includes a honeycomb structure and a mesh stacking structure.

[0035] In other embodiments, the porous structure may be one or two of closed-cell porous structures, semi-closed-cell porous structures, and open-cell porous structures. The mesh structure may also be a honeycomb structure or a mesh stacking structure.

[0036] In some embodiments, the porous structure is made of one or more of the following materials: polyolefin foam, expanded polystyrene, expanded polypropylene, expanded rubber, expanded ethylene vinyl acetate, expanded ethylene, expanded polyethylene, ethylene-vinyl acetate copolymer (EVA), radiation-crosslinked polyethylene (IXPE), polypropylene (PP), compressible natural materials, and expanded polystyrene (XPS); the mesh structure is made of one or more of the following materials: ethylene-vinyl acetate copolymer (EVA), radiation-crosslinked polyethylene (IXPE), expanded polypropylene (XPP), and expanded polystyrene (XPS). The buffer layer 5 formed from these materials can have the aforementioned porous structure and / or mesh structure to reduce noise propagation. In this invention, the buffer layer 5 can be directly purchased; simply purchasing the buffer layer 5 formed from the aforementioned materials is sufficient.

[0037] In some embodiments, the first carrier layer 4 is one or more of a high-density fiberboard layer, a wood-plastic composite layer, a polyvinyl chloride resin layer, and a high-end vinyl layer. In this invention, the first carrier layer 4 can be purchased directly.

[0038] In some embodiments, the PET foam substrate layer 6, by weight percentage, comprises 30%-45% PET, 50%... 60% CaCO3, 2% 6% lubricant and 4% 7% PET toughening agent. As an example, the weight percentage of PET in the PET foam substrate layer 6 is 30%, 35%, 40%, or 45% and any value within that range; the weight percentage of CaCO3 is 50%, 52%, 54%, 56%, 58%, or 60% and any value within that range; the weight percentage of lubricant is 2%, 3%, 4%, 5%, or 6% and any value within that range; and the weight percentage of PET toughening agent is 4%, 5%, 6%, or 7% and any value within that range.

[0039] In some embodiments, the back film layer 7 is made of electron radiation cross-linked polyethylene foam (IXPE material).

[0040] In some embodiments, one end of the soundproof wall panel is provided with a panel lock 8, and the other end is provided with a panel buckle 9. The panel buckle 9 of one soundproof wall panel can be spliced ​​with the panel lock 8 of an adjacent soundproof wall panel.

[0041] Secondly, this application provides a manufacturing process for a soundproof wall panel, comprising: S01: hot-pressing the PET decorative layer 3, the PET wear-resistant layer 2, and the first carrier layer 4 into a surface layer; S02: extruding a PET foamed substrate to form the PET foamed substrate layer 6; S03: UV tempering the surface layer; S04: pressing the surface layer, the buffer layer 5, the PET foamed substrate layer 6, and the backing film layer 7 together; S05: cutting and grooving. By preparing the soundproof wall panel through the above-described layered and step-by-step pressing method, the soundproof wall panel can achieve better performance, better noise reduction, and higher strength.

[0042] Specifically, S01: The PET decorative layer 3, the PET wear-resistant layer 2, and the first carrier layer 4 are hot-pressed into a surface layer; wherein the press pressure is between 1.5-2.5 MPa, the hot-pressing temperature has 5 stages: 60-70℃, 90-100℃, 150-170℃, 110-120℃, and 60-70℃, and the time is 2-3 hours. Through the above hot-pressing process, the bonding strength of the surface layer can be improved, so that it can be bonded to other layers in the future to obtain a sound insulation wall panel with higher strength.

[0043] As an example, the press pressure is 1.5MPa, 2MPa, or 2.5MPa, or any value within the range thereof, and the hot pressing time is 2h, 2.5h, or 3h, or any value within the range thereof.

[0044] S02: A PET foamed substrate is extruded to form the PET foamed substrate layer 6. First, the raw materials are mixed according to the production ratio of the PET foamed substrate layer 6, and then kept at a temperature between 160-190℃ for at least 3 hours to ensure the stability of the formed foamed material. Then, single-screw extrusion is performed, followed by supercritical CO2 foaming technology (supercritical CO2 foaming agent technology is used to foam the material after single-screw extrusion, resulting in better foaming effect). Finally, twin-screw extrusion is performed, and the material is shaped on a cooling table to form the PET foamed substrate layer 6. The density of the PET foamed substrate layer 6 is 1.0-1.2 g / cm³. 3 Between. By combining the material composition of the aforementioned PET foam substrate layer 6 with the aforementioned preparation process, the performance of the material can be improved.

[0045] As an example, after the raw materials are mixed, the temperature for heat preservation is any value within the range of 160℃, 165℃, 170℃, 175℃, 180℃, 185℃, or 190℃, and the heat preservation time is any value within the range of 3h, 3.5h, 4h, 4.5h, or 5h. The density of the resulting PET foam substrate layer 6 is 1.0 g / cm³. 3 1.1 g / cm 3 Or 1.2g / cm 3 and any value within its range.

[0046] S03: UV temper the surface layer; wherein, a UV paint 1 is formed on the surface layer, the tempering temperature is 85-95℃, and after tempering, the surface layer is cured at 20-25℃ for more than 24 hours. The surface properties can be achieved using different paints according to customer requirements; the paints are purchased from the market.

[0047] As an example, the tempering temperature is any value within the range of 85, 90, or 95°C, and the tempering time is 5-10 minutes, for example, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, or 10 minutes. The curing temperature after tempering is any value within the range of 20°C, 22°C, or 25°C, and the curing time is any value within the range of 24 hours, 26 hours, 28 hours, or 30 hours.

[0048] S04: Press the surface layer, the buffer layer 5, the PET foam substrate layer 6, and the back film layer 7 together; wherein, first press the back film layer 7 with the PET foam substrate layer 6; then use cold glue AB glue, with a glue amount of 60-70g / cm³. 3 Between these steps, the buffer layer 5 is bonded to the PET foam substrate layer 6, and then placed in a cold press with a pressure of not less than 100t and a time of ≥6h; then, cold glue AB is applied with a glue amount of 60-70g / cm³.3 Between these steps, the surface layer is then attached to the buffer layer 5, and then it enters a cold press with a pressure of not less than 100t and a time of ≥6h.

[0049] As an example, the amount of AB glue is 60 g / cm³. 3 65 g / cm 3 Or 70g / cm 3 The pressure of the press is 100t, 110t or 120t or any value within the range, and the pressing time is 6h, 7h, 8h or 9h or any value within the range.

[0050] S05: Cutting and grooving. The grooving process involves sawing the finished large board into smaller pieces, and then processing the edges and corners of the smaller pieces to form a soundproof wall panel with a panel lock 8 and a panel buckle 9 at each end, in order to meet the customer's appearance requirements.

[0051] The following describes embodiments of the present invention. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the art or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all conventional products that can be obtained commercially.

[0052] Example 1 A manufacturing process for a soundproof wall panel includes: S01: The PET colored film (PET decorative layer 3), the PET wear-resistant layer 2, and the first carrier layer 4 (high-density fiberboard layer) are hot-pressed into a surface layer; wherein, the press pressure is 2MPa, the hot-pressing temperature has 5 stages, namely 60-70℃, 90-100℃, 150-170℃, 110-120℃, and 60-70℃, and the time is 2.5h.

[0053] S02: By weight percentage, 35% PET, 55% CaCO3, 5% lubricant, and 5% PET toughening agent are mixed and held at 170°C for 5 hours. Then, single-screw extrusion is performed, followed by supercritical CO2 foaming technology for foaming, and finally twin-screw extrusion. The mixture is then shaped on a cooling table to form the PET foamed substrate layer 6, wherein the density of the PET foamed substrate layer 6 is 1.1 g / cm³. 3 The lubricant can be polyethylene wax, and the toughening agent can be powdered nitrile rubber (NBR).

[0054] S03: UV paint 1 is formed on the surface layer in step S01. The tempering temperature is 90℃ and the tempering time is 30min. After tempering, the surface layer is cured at 22℃ for 30h.

[0055] S04: First, press the backing film layer 7 (IXPE material layer) to the PET foam substrate layer 6; then use cold glue AB glue with a glue amount of 65g / cm³. 3 The buffer layer 5 (polyolefin foam) is bonded to the PET foam substrate layer 6, and then placed in a cold press at a pressure of 100t for 8 hours; then, cold glue AB is applied with a glue volume of 65g / cm³. 3 Then the surface layer is attached to the buffer layer 5, and then it enters the cold press with a pressure of 100t for 8 hours.

[0056] A PET wear-resistant layer 2, a PET decorative layer 3, a first carrier layer 4, a buffer layer 5, a PET foam substrate layer 6, and a back film layer 7 are formed and stacked sequentially along the thickness direction; wherein, the buffer layer 5 has a porous structure and / or a mesh structure.

[0057] S05: Cut and groove to form a soundproof wall panel with plate locks 8 and plate buckles 9 at both ends.

[0058] Example 2 The difference between Example 2 and Example 1 is as follows: S02: By weight percentage, 40% PET, 52% CaCO3, 3% lubricant, and 5% PET toughening agent are mixed and held at 170°C for 5 hours. Then, single-screw extrusion is performed, followed by supercritical CO2 foaming technology for foaming, and finally twin-screw extrusion. The mixture is then shaped on a cooling table to form the PET foamed substrate layer 6, wherein the density of the PET foamed substrate layer 6 is 1.15 g / cm³. 3 The lubricant can be polyethylene wax, and the toughening agent can be powdered nitrile rubber (NBR).

[0059] Example 3 The difference between Example 3 and Example 1 is that the material of the buffer layer 5 is expanded polystyrene.

[0060] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is as follows: Without first hot pressing to form the surface layer, the PET color film (PET decorative layer 3), PET wear-resistant layer 2, and the first carrier layer 4 and buffer layer are directly bonded together and put into the cold press for processing.

[0061] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is as follows: No buffer layer is set.

[0062] The performance of the soundproof wall panels provided in Examples 1 to 3 and Comparative Examples 1 to 2 was tested, as shown in Table 1.

[0063] Table 1 Performance of Sound Insulation Wall Panels As can be seen from Table 1, the soundproof wall panel provided in this embodiment has good sound insulation effect, and both surface and internal bonding are high, resulting in good strength.

[0064] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A soundproof wall panel, characterized in that, include: The PET wear-resistant layer (2), PET decorative layer (3), first carrier layer (4), buffer layer (5), PET foam substrate layer (6) and back film layer (7) are stacked sequentially along the thickness direction. The buffer layer (5) is a porous structure and / or a mesh structure.

2. The soundproof wall panel according to claim 1, characterized in that: The porous structure includes closed-cell porous structure, semi-closed-cell porous structure and open-cell porous structure; the mesh structure includes honeycomb structure and mesh stacking structure.

3. The soundproof wall panel according to claim 1, characterized in that: The porous structure is made of one or more of the following materials: polyolefin foam, expanded polystyrene, expanded polypropylene, expanded rubber, expanded ethylene vinyl acetate, expanded ethylene, expanded polyethylene, ethylene-vinyl acetate copolymer, irradiated crosslinked polyethylene, polypropylene, compressible natural materials, and expanded polystyrene; the network structure is made of one or more of the following materials: ethylene-vinyl acetate copolymer, irradiated crosslinked polyethylene, expanded polypropylene, and expanded polystyrene.

4. The soundproof wall panel according to claim 1, characterized in that: The first carrier layer (4) is one or more of the following: high-density fiberboard layer, wood-plastic composite material layer, polyvinyl chloride resin layer, and high-end vinyl layer; Or / and, by weight percentage, the PET foam substrate layer (6) comprises 30%-45% PET, 50%... 60% CaCO3, 2% 6% lubricant and 4% 7% PET toughening agent; Or / and, the material of the back film layer (7) is electron radiation cross-linked polyethylene foam.

5. The soundproof wall panel according to any one of claims 1-4, characterized in that: One end of the soundproof wall panel is provided with a plate lock (8), and the other end is provided with a plate buckle (9). The plate buckle (9) of one soundproof wall panel can be spliced ​​with the plate lock (8) of the adjacent soundproof wall panel.

6. A manufacturing process for a soundproof wall panel according to any one of claims 1-5, characterized in that: include: S01: The PET decorative layer (3), the PET wear-resistant layer (2), and the first carrier layer (4) are hot-pressed into a surface layer; S02: Extruding the PET foam substrate to form the PET foam substrate layer (6); S03: UV temper the surface layer; S04: Press the surface layer, the buffer layer (5), the PET foam substrate layer (6), and the back film layer together; S05: Cutting, grooving.

7. The manufacturing process of the soundproof wall panel according to claim 6, characterized in that: In step S01, the press pressure is between 1.5-2.5 MPa, and the hot pressing temperature has 5 stages: 60-70℃, 90-100℃, 150-170℃, 110-120℃, and 60-70℃, with a total time of 2-3 hours.

8. The manufacturing process of the soundproof wall panel according to claim 6, characterized in that: In step S02, the raw materials are first mixed according to the raw material preparation ratio of the PET foamed substrate layer (6), and kept at a temperature between 160-190℃ for more than 3 hours. Then, single-screw extrusion is performed, followed by supercritical CO2 foaming technology for foaming, and then twin-screw extrusion. The PET foamed substrate layer (6) is shaped and formed on a cooling table. The density of the PET foamed substrate layer (6) is 1.0-1.2 g / cm³. 3 between.

9. The manufacturing process of the soundproof wall panel according to claim 6, characterized in that: In step S03, a UV varnish (1) is formed on the surface layer, and the tempering temperature is 85-95℃. After tempering, the surface layer is cured at 20-25℃ for more than 24 hours.

10. The manufacturing process of the soundproof wall panel according to any one of claims 6-9, characterized in that: In step S04, cold glue AB glue is used, with a glue volume of 60-70g / cm. 3 Between, the buffer layer (5) is attached to the PET foam substrate layer (6), and then enters a cold press with a press pressure of not less than 100t and a time of ≥6h; Use cold glue (AB type) with a glue volume of 60-70g / cm². 3 Between, the surface layer is then attached to the buffer layer (5), and then enters the cold press with a press pressure of not less than 100t and a time of ≥6h.

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