Rigid polyurethane-filled sound absorption and vibration reduction plate

Abstract

The utility model discloses a rigid filled polyurethane sound absorption and vibration attenuation plate, which belongs to the field of multipurpose high polymer material products, and comprises a polyether type flexible foam polyurethane matrix, two rigid inclusions with openings are inserted in the middle of the polyether type flexible foam polyurethane matrix, the rigid inclusions are hard PVC (polyvinyl chloride) pipes, and the rigid PVC pipes are filled with polyurethane. And polyurethane is filled in the hard PVC pipe to form the sound absorption and vibration reduction plate. Rigid inclusions are embedded in a base body, namely, two PVC pipes with openings are inserted, and polyether type flexible foam polyurethane is filled in the PVC pipes. According to the rigid filled polyurethane sound absorption and vibration attenuation plate, polyether type flexible foam polyurethane is adopted as a base material and a filling material, the structure type of the rigid filled polyurethane sound absorption and vibration attenuation plate is of an open hole type, and the obtained rigid filled polyurethane sound absorption and vibration attenuation plate has the excellent performance of sound absorption, ventilation, water resistance, moisture resistance, heat preservation, heat insulation, phase change energy storage and the like and is wide in application prospect.

Description

Technical Field

[0001] The utility model is a multi-purpose polymer material product, which is widely used in the construction industry, home decoration, transportation, industrial applications and other fields. Specifically, it relates to a rigid filled polyurethane sound absorption and vibration reduction board. Background Art

[0002] With the acceleration of urbanization and the continuous improvement of people's quality of life, the materials and technologies in the construction field are constantly innovating and upgrading, and people are placing higher demands on the acoustic quality of their living and working environments. The use of vibration-damping, sound-absorbing, and sound-insulating composite materials can effectively reduce noise pollution inside and outside buildings, improve the quality of indoor acoustic environments, and meet the demand for high-quality acoustic environments in modern architecture. Currently, the commonly used sound insulation materials in Chinese buildings include mineral wool boards, glass wool boards, polyurethane boards, expanded polystyrene boards, and wooden sound-absorbing boards, with polyurethane boards being the most widely used.

[0003] In the field of architectural acoustics, the widespread application of traditional polyurethane sound insulation panels in various engineering projects is significantly hindered by their high cost, limited sound insulation performance, and difficulty in installation. Specifically, polyurethane sound insulation panels have limited ability to handle mid- and high-frequency noise, and their sound insulation performance is relatively poor when it comes to the more critical low-frequency vibration noise. Current research indicates that the potential harm of low-frequency noise to human physical and mental health cannot be ignored, including but not limited to hearing loss, poor sleep quality, and cardiovascular dysfunction.

[0004] Therefore, further exploring the efficient sound absorption performance of polyurethane sound-absorbing and vibration-damping panels in the low-frequency range has important practical application significance. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes a rigid-filled polyurethane sound-absorbing and vibration-damping panel. This product, intended for use as a vibration-damping and sound-insulating layer for floor and wall panels, exhibits excellent low-frequency sound absorption properties, effectively absorbing and converting vibration energy. Furthermore, the periodic design of the structure facilitates modular fabrication, making installation relatively simple and suitable for widespread use.

[0006] This utility model constructs a rigid-filled polyurethane sound-absorbing and vibration-damping panel. It uses a polyether-type soft foam polyurethane matrix, into which rigid inclusions, namely two rigid PVC pipes, are inserted. The PVC pipes are then filled with polyurethane (the same matrix) to form a 40*4*2cm unit. These units are arranged horizontally and periodically, and adjacent units are bonded with polyurethane hot-melt adhesive (PUR hot-melt adhesive) to form a 40*40*2cm sound-absorbing and vibration-damping panel. This panel can then be applied to floor and wall panels for sound-absorbing and vibration-damping layers.

[0007] Specifically, the utility model is achieved as follows:

[0008] A rigid filled polyurethane sound absorption and vibration damping plate, characterized in that the sound absorption and vibration damping plate comprises a polyether soft foam polyurethane matrix, two rigid inclusions with openings are inserted in the middle of the polyether soft foam polyurethane matrix, the rigid inclusions are rigid PVC tubes, polyurethane is filled in the rigid PVC tubes to form a sound absorption and vibration damping plate; the rigid substrate is below the polyether soft foam polyurethane matrix, the opening direction of the rigid PVC tube is clockwise with the position of the rigid substrate as the starting point; the inner surface of the rigid PVC tube is the inner surface of the rigid PVC tube. Two rigid PVC tubes with a radius of 0.7 cm and a length of 40 cm are inserted into a polyether soft foam polyurethane matrix, with the centers of the two rigid PVC tubes 2 cm apart. One of the rigid PVC tubes is laser-cut with a rectangular opening of 40 cm in length, 0.14 cm in width, and 0.1 cm in height at π / 2 in the clockwise direction. The other rigid PVC tube is laser-cut with four rectangular openings of 40 cm in length, 0.14 cm in width, and 0.1 cm in height at 0, π / 2, π, and 3π / 2 in the clockwise direction.

[0009] Furthermore, the polyurethane filled in the PVC tube is a polyether-type soft foam polyurethane having the same base as the polyether-type soft foam polyurethane; and the rigid substrate is a floor or a wall.

[0010] Furthermore, the vibration-damping and sound-isolating part of the sound-absorbing and vibration-damping plate is a polyether-type soft-foam polyurethane foam in a polyether-type soft-foam polyurethane matrix. The thickness of the polyether-type soft-foam polyurethane matrix is 2 cm, and the porosity of the polyether-type soft-foam polyurethane matrix is 95%.

[0011] Furthermore, the mass percentage of each component in the polyether-type soft foam polyurethane matrix is as follows: polyether polyol 40-60%, isocyanate 30-50%, silicone oil 1-1.2%, catalyst 0.1-1%, foam stabilizer 0.5-3%, water 1.5-3%, physical foaming agent 5-8%, and the foaming agent is used at a temperature between 22-28°C.

[0012] Furthermore, the sound-absorbing part of the sound-absorbing and vibration-damping plate is a rigid PVC tube; the mass percentage of each component in the rigid PVC tube is: polyvinyl chloride (PVC): 40-95%, nano-reinforcement material: 0.2-30%, heat stabilizer: 1-5%, lubricant: 0.5-3%, filler: 10-40%, and processing aid: 4.8-30%.

[0013] Furthermore, the order of filling the polyether-type soft foam polyurethane matrix, the hard PVC tube, and the polyurethane is: inserting the hard PVC tube into the polyether-type soft foam polyurethane matrix, and then filling the hard PVC tube with polyurethane.

[0014] Furthermore, the polyether-type soft foam polyurethane matrix is used as a matrix, and rigid inclusions, namely two rigid PVC tubes, are inserted into it. The rigid PVC tubes are then filled with polyurethane of the same material as the matrix to form a 40*4*2 cm unit body; the unit bodies are periodically arranged, and adjacent units are bonded to form a 40*40*2 cm sound-absorbing and vibration-damping board using polyurethane hot-melt adhesive.

[0015] Furthermore, in order to ensure the continuity of the rigid PVC pipe, no continuous slits are provided along the entire length of the pipe. Instead, a slit is provided every 2 cm at every 17 cm length.

[0016] Furthermore, the base layer (floor or wall panel) to be collaged is cleaned and repaired and leveled. After treatment, primer is evenly applied on the surface of the base layer, and the blocks of sound-absorbing and vibration-damping panels are placed on the treated base layer and firmly glued with adhesive. When collaging, fixing parts such as screws or other special clamps need to be installed around the sound-absorbing and vibration-damping panels, and sealant is used to seal the gaps between the panels. After installation, the sound-absorbing and vibration-damping panels are maintained to ensure that they are fully cured.

[0017] The preparation method of the rigid filled polyurethane sound absorption and vibration reduction plate of the utility model comprises the following steps:

[0018] 1) Preparation of a polyether-type soft foam polyurethane matrix and a polyether-type soft foam polyurethane filled in a PVC tube: Weigh the following components according to the following ratios: 40-60% of polyether polyol, 30-50% of isocyanate, 1-1.2% of silicone oil, 0.1-1% of a catalyst (to accelerate gas evolution and gelation reactions), 0.5-3% of a foam stabilizer (to stabilize the foam and control the pore size), 0.5-0.8% of a plasticizer (to improve the mechanical properties of the product), 5-8% of a physical foaming agent, dichloromethane (as a bubble source), 8-12% of a filler (calcium carbonate, calcium sulfate, calcium chloride, barium carbonate, barium sulfate, barium chloride, etc.), 1.5-3% of water (chain extender), a flame retardant, and a release agent. The polyether, filler, and plasticizer are mixed in specific proportions, metered, and ball-milled until uniform. Silicone oil, dichloromethane, a catalyst, and water are then added and stirred until uniform. The reaction mixture, after adding the isocyanate, is then foamed in a fixed mold. The foam undergoes a period of aging to ensure structural stability and chemical maturity. Finally, it is cut and trimmed into a single unit measuring 40 cm long, 4 cm wide, and 2 cm high, as well as two filled cylinders measuring 40 cm long and 0.68 cm in radius.

[0019] 2) A rigid PVC tube with an inner radius of 0.7 cm and a length of 40 cm was selected. Two rigid PVC tubes were inserted into a polyether-based soft foam polyurethane matrix, with the centers of the two PVC tubes 2 cm apart. One of the PVC tubes was laser-cut to create a rectangular opening 40 cm long, 0.14 cm wide, and 0.1 cm high at π / 2 in the clockwise direction. PVC tube 2 was laser-cut to create four rectangular openings 40 cm long, 0.14 cm wide, and 0.1 cm high at 0, π / 2, π, and 3π / 2 in the clockwise direction, respectively. To ensure the integrity of the pipe structure, a continuous slit was not provided along the entire length of the pipe. Instead, a slit was provided every 2 cm within a 17 cm range.

[0020] 3) Soft-bubble polyurethane foam filled in rigid inclusions: Soft-bubble polyurethane was filled in the inserted PVC tube, and the polyurethane foam was trimmed into a cylinder with a radius of 0.68 cm and a length of 40 cm, and inserted into the two hollow PVC tubes mentioned above.

[0021] 4) The units prepared above were periodically arranged to form a sound-absorbing and vibration-damping plate with a length*width*height of 40*40*2 cm, and adjacent units were bonded together with polyurethane hot melt adhesive (PUR hot melt adhesive).

[0022] 5) Clean the base layer (floor or wall panel) to be collaged and repair and level it. After treatment, evenly apply primer on the surface of the base layer. Then place the blocks of sound-absorbing and vibration-damping panels on the treated base layer and stick them firmly with adhesive. Fixing parts such as screws or other special clamps need to be installed around the sound-absorbing and vibration-damping panels, and seal the gaps between the panels with sealant. After installation, continue with the post-maintenance of the sound-absorbing and vibration-damping panels to ensure that they are fully cured.

[0023] The beneficial effects of the present invention compared with the prior art are:

[0024] 1) Using rigid filled polyurethane sound absorption and vibration damping panels, the size of the units can be controlled by periodically arranging them. Compared with the traditional foam concrete filling that requires complex on-site pouring, prefabricated polyurethane sound absorption and sound insulation panels reduce construction difficulty, save production costs, and simplify the production process;

[0025] 2) Filling the inserted rigid PVC tube with the same polyurethane as the matrix allows the inner wall of the PVC tube and the filler to interact with each other, thereby achieving local resonance mode sound absorption and effectively improving the low-frequency sound absorption capacity of the unit.

[0026] 3) The inserted rigid inclusions (rigid PVC tubes) can effectively improve the strength of the polyurethane board. At the same time, by inserting the rigid inclusions, Bragg scattering mode sound absorption can be achieved between it and the rigid substrate (floor wall), thereby broadening the low-frequency sound absorption frequency bandwidth.

[0027] 4) By using polyether-type soft foam polyurethane as a matrix, inserting a rigid inclusion (rigid PVC tube) with an opening in the middle of the matrix, and filling the PVC tube with polyether-type soft foam polyurethane to form a unit, the local resonance mode can be coupled with the Bragg scattering mode, so that the sound absorption coefficient of the unit is increased by 25-30% compared with ordinary polyurethane sound insulation boards, and the low-frequency sound absorption range is significantly widened, effectively reducing common noise in the room and increasing the comfort and safety of indoor living.

[0028] 5) The present invention provides a rigid-filled polyurethane sound-absorbing and vibration-damping panel to address the current vibration and noise issues within buildings. The panel is constructed using a polyether-type soft foam polyurethane as a matrix with a porosity of 95%. Rigid inclusions are embedded within the matrix, i.e., two open-cell PVC tubes are inserted, each filled with polyether-type soft foam polyurethane. Using polyether-type soft foam polyurethane as both the matrix and filler material, the resulting rigid-filled polyurethane sound-absorbing and vibration-damping panel exhibits excellent properties, including sound absorption and breathability, waterproofing and moisture resistance, thermal insulation, and phase-change energy storage, offering promising applications.

[0029] 6) This utility model provides a rigid-filled polyurethane sound-absorbing and vibration-damping panel. By placing a sound-absorbing and vibration-damping layer between the floor or wall panels and the structural layer, it effectively reduces sound transmission between the floors, as well as impact noise and vibrations generated by mechanical equipment, achieving excellent vibration reduction. Furthermore, the panel's material and structural design generally ensure a long service life and are easy to install, requiring minimal modifications to the floor structure. It is suitable for a variety of building types, including residential, commercial, schools, and hospitals. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic cross-section of a periodic unit of a rigid-filled polyurethane sound-absorbing and vibration-damping plate according to an embodiment of the present invention;

[0031] Figure 2 A perspective view of a periodic unit of a rigid-filled polyurethane sound-absorbing and vibration-damping plate according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the opening of the rigid PVC pipe described in the embodiment of the present utility model;

[0033] Figure 4 Schematic diagram of the periodic structure of the rigid filled polyurethane sound absorption and vibration reduction plate in the embodiment of the present utility model;

[0034] Figure 5 The absorption coefficient curve of the model in the embodiment of the present utility model and the sound pressure cloud diagram of the frequency corresponding to the peak value of the absorption coefficient;

[0035] Among them, 1-polyether soft foam polyurethane matrix, 2-rigid PVC pipe, 3-polyurethane, 4-rigid substrate (floor or wall). DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and effect of the present invention more clear and explicit, the following examples are given to further illustrate the present invention in detail. It should be noted that the specific implementation described here is only used to explain the present invention and is not intended to limit the present invention.

[0037] like Figure 1 As shown, the sound absorption and vibration reduction plate includes a polyether-type soft foam polyurethane matrix 1, two rigid inclusions with openings are inserted in the middle of the polyether-type soft foam polyurethane matrix 1, and the rigid inclusions are hard PVC tubes 2. The hard PVC tubes 2 are filled with polyurethane 3 to form a sound absorption and vibration reduction plate; the rigid substrate 4 is located below the polyether-type soft foam polyurethane matrix 1, and the opening direction of the hard PVC tube 2 is clockwise starting from the position of the rigid substrate 4; the inner radius of the hard PVC tube 2 is 0.7 cm , 40 cm long, two rigid PVC tubes 2 are inserted into the polyether soft foam polyurethane matrix 1, where the centers of the two rigid PVC tubes 2 are 2 cm apart, and one of the rigid PVC tubes 2 is laser cut into a rectangular opening of 40 cm long, 0.14 cm wide, and 0.1 cm high at π / 2 in the clockwise direction, and the other rigid PVC tube 2 is laser cut into four rectangular openings of 40 cm long, 0.14 cm wide, and 0.1 cm high at 0, π / 2, π, and 3π / 2 in the clockwise direction.

[0038] Specifically, the present invention provides a rigidly filled polyurethane sound-absorbing and vibration-damping panel. It comprises a polyether-based soft foam polyurethane matrix (1), into which are inserted rigid inclusions, namely two rigid PVC tubes (2). The rigid PVC tubes (2) are then filled with the same polyurethane as the matrix material to form a 40 x 4 x 2 cm unit. These units are periodically arranged, and adjacent units are bonded using polyurethane hot melt adhesive (PUR hot melt adhesive) to form a 40 x 40 x 2 cm sound-absorbing and vibration-damping panel.

[0039] The thickness of the polyether soft foam polyurethane matrix 1 is 2 cm; the polyurethane cylinder inserted into the hard PVC tube 2 is made of the same matrix material, namely polyurethane 3.

[0040] The weight percentages of the components in the polyether-based flexible polyurethane foam matrix 1 are as follows: 40-60% polyether polyol, 30-50% isocyanate, 1-1.2% silicone oil, 0.1-1% catalyst, 0.5-3% foam stabilizer, 0.5-0.8% plasticizer, 5-8% physical blowing agent, 8-12% filler, 1.5-3% water, flame retardant, and release agent. When preparing polyurethane foam, the basic raw materials are polyether and isocyanate, with silicone oil added as a dispersant and foam leveler. Adding fillers increases density and load-bearing capacity, but also stiffens the material and reduces resilience. Therefore, adding methylene chloride to generate microbubbles not only promotes uniform distribution of the filler but also improves the open cell nature of the foam. Finally, adding a plasticizer improves elasticity, resolving the issues of stiffness and low resilience caused by fillers. The fillers are one or more of calcium carbonate, calcium sulfate, calcium chloride, barium carbonate, barium sulfate, and barium chloride. The plasticizer is dioctyl phthalate. The added isocyanate needs to be stirred for 3-5 seconds.

[0041] like Figures 2-4 As shown in the figure, the opening direction of the rigid PVC tube is defined as starting from the position of the rigid substrate and in a clockwise direction. The direction angle of rigid PVC tube 1 is π / 2, and the direction angle of rigid PVC tube 2 is 0, π / 2, π, 3π / 2; the inner radius of rigid PVC tube 2 is 0.7 cm and the length is 40 cm. Two rigid PVC tubes 2 are inserted into the polyether-type soft foam polyurethane matrix 1, with the centers of the two PVC tubes 2 cm apart. One of the rigid PVC tubes 2 is laser-cut to form a rectangular opening 40 cm long, 0.14 cm wide, and 0.1 cm high at π / 2 in the clockwise direction. The other rigid PVC tube 2 is laser-cut to form four rectangular openings 40 cm long, 0.14 cm wide, and 0.1 cm high at 0, π / 2, π, and 3π / 2 in the clockwise direction.

[0042] To ensure the integrity of the pipe structure, we chose not to provide continuous slits along the entire length of the rigid PVC pipe 2. Instead, we placed slits every 2 cm at every 17 cm. The inserted rigid PVC pipe 2 was filled with the same material as the polyether-based flexible foam polyurethane matrix 1, forming a unit with a radius of 0.68 cm and a length of 40 cm.

[0043] The units are arranged periodically to form a sound-absorbing and soundproofing panel measuring 40 x 40 x 2 cm in length, width, and height. These units are bonded together using polyurethane hot-melt adhesive (PUR hot-melt adhesive). Before bonding, clean the polyurethane panel surface. Place the PUR hot-melt adhesive in a dedicated hot-melt adhesive dispenser and adjust the machine temperature between 105°C and 120°C. Use a spray gun or roller to evenly apply the heated PUR hot-melt adhesive to the bonding surface of the polyurethane panel. Before the PUR hot-melt adhesive fully cures, place the next polyurethane panel to be bonded onto the hot-melt-coated panel. Immediately apply appropriate pressure to ensure a uniform and secure bond between the PUR hot-melt adhesive and the polyurethane panel. After cooling, the sound-absorbing and soundproofing panel is formed. The units are bonded together using a specially designed polyurethane hot-melt adhesive (PUR hot-melt adhesive). PUR hot-melt adhesive offers excellent bond strength, temperature resistance, chemical resistance, and aging resistance, forming strong bonds with a variety of materials, including polyurethane itself. This adhesive cures via moisture after application, requiring no additional drying process, and provides a fast, high-strength bond.

[0044] Before installing the sound-absorbing and vibration-damping panels, thoroughly clean the substrate (floor or wall) to remove any dust, oil, or debris. Perform necessary repairs and leveling, then apply an even layer of primer to the treated surface. Primer strengthens the adhesion between the panels and the substrate, improving overall stability and durability. Place the panels one by one on the primed substrate. During placement, ensure that the gaps between the panels are evenly distributed and that they fit snugly against the substrate, with no noticeable gaps. Use a specialized adhesive to secure the panels. The adhesive should be selected based on the panel material and environmental conditions. During installation, secure the panels with fasteners, such as screws or specialized clamps, to prevent them from moving or falling off. Use sealant to seal the gaps between panels and the joints between the panels and the substrate. This sealant not only prevents air and moisture penetration but also improves the sound insulation performance of the entire structure. After installation, perform appropriate post-curing on the panels to ensure they are fully cured. During the curing period, avoid applying excessive pressure or impact to the board to avoid affecting its performance.

[0045] We utilize the principles of local resonance and Bragg scattering to enhance the absorption and dissipation of acoustic energy within porous materials, leveraging the low-frequency local resonance characteristics of rigid inclusions (rigid PVC pipes) and the interaction of these inclusions with the rigid substrate (floor or wall) through Bragg modes. Local resonance materials effectively control the acoustic wave within the inclusion by matching the resonance unit with the acoustic wave frequency. The inclusion interacts with the filler within the inclusion, generating energy dissipation and achieving efficient absorption of acoustic energy. While the structural dimensions are much smaller than the wavelength of the active acoustic wave (by two orders of magnitude), the larger wavelength portion can be precisely controlled, particularly at low frequencies, forming an acoustic bandgap that prevents acoustic wave transmission. Bragg scattering modes, in which waves are reflected and refracted by periodic structures, cause significant retention of acoustic energy in the region between the rigid inclusion and the rigid substrate. Some of the acoustic energy is unable to effectively penetrate or bypass the inclusion, resulting in energy accumulation in the region between the inclusion and the rigid substrate. This leads to increased acoustic energy dissipation and absorption, thereby altering the overall absorption properties of the porous layer. Bragg scattering, based on the interaction between material properties and the periodicity of elastic waves, prevents waves of certain frequencies from matching the vibration mode, creating a propagation band gap. However, since Bragg scattering requires the lattice constant to be close to the wavelength of the sound wave, its widespread application is limited. Therefore, we considered combining the principles of local resonance and Bragg scattering to broaden the low-frequency sound absorption range of the structure.

[0046] We simulated the model using the finite element software COMSOL and obtained the absorption coefficient curve of the model and the sound pressure cloud diagram of the frequency corresponding to the peak of the absorption coefficient, as shown in the figure below. Figure 5 As shown in the contour plot, Peak A corresponds to the localized resonance mode, where the acoustic energy is primarily concentrated within the inclusion. Peak B corresponds to the Bragg scattering mode, where the acoustic energy is primarily concentrated between the inclusion and the rigid substrate. It can be seen that the interaction between the localized resonance mode and the Bragg scattering mode generates a coupled mode, resulting in a high absorption coefficient over a wide frequency range.

[0047] In order to better understand the present invention, the following embodiments of the present invention are described in detail with reference to specific data examples and drawings. In the following embodiments, unless otherwise specified, the reagents used are commercially available chemical reagents or industrial products.

[0048] Preparation of soft foam polyurethane matrix and filling in PVC tube:

[0049] (1) Weigh the components according to the weight ratio of 50 kg of polyether polyol, 35 kg of isocyanate, 1.2 kg of silicone oil, 0.3 kg of catalyst, 0.8 kg of foam stabilizer, 8 kg of plasticizer (dioctyl phthalate), 12 kg of filler (calcium carbonate), and 3 kg of water, and set aside;

[0050] (2) mixing the polyether, filler, and plasticizer and ball-milling the mixture to obtain a mixture;

[0051] (3) Add silicone oil, catalyst, plasticizer and water to the mixture, stir evenly, add isocyanate, stir for 5 seconds, pour into the mold and foam to obtain soft foam polyurethane foam plastic.

[0052] (4) Cut the foamed polyurethane into a rectangular parallelepiped with a length of 40 cm, a width of 4 cm, and a height of 2 cm as the matrix. Select commonly used hard PVC tubes on the market with a length of 40 cm and an inner radius of 0.7 cm. The centers of two PVC tubes are 2 cm apart. PVC tube 1 is laser-cut with a rectangular opening of 40 cm in length, 0.14 cm in width, and 0.1 cm in height at π / 2 in the clockwise direction. PVC tube 2 is laser-cut with four rectangular openings of 40 cm in length, 0.14 cm in width, and 0.1 cm in height at 0, π / 2, π, and 3π / 2 in the clockwise direction, respectively. These are then inserted into the matrix.

[0053] To ensure structural integrity, the slits in the rigid PVC pipe were not created continuously along its entire length. Instead, slits were placed every 2 cm over a 17 cm radius. The polyurethane was cut into cylinders with a radius of 0.68 cm and a length of 40 cm. These cylinders were then filled into the rigid PVC pipe to form a unit.

[0054] Use PUR hot-melt adhesive to combine the units into a 40 x 40 x 2 cm sound-absorbing and vibration-damping panel. First, clean the panel surface. Place the hot-melt adhesive in a hot-melt machine, set the machine temperature to 105-120°C, and evenly apply it to the polyurethane panel with a spray gun. Then, attach another unit and apply pressure to the bond. Once the adhesive cools, it reacts with moisture and solidifies, forming a high-strength bond, creating a sound-absorbing and sound-insulating panel.

[0055] Clean the base layer (floor or wall panel) to be collaged and repair and level it. After treatment, evenly apply primer on the surface of the base layer. Then place the blocks of sound-absorbing and vibration-damping panels on the treated base layer and stick them firmly with adhesive. During the installation process, it is necessary to install fixings around the sound-absorbing and vibration-damping panels, such as screws or other special clamps, and use sealant to seal the gaps between the panels. After the installation is completed, continue the post-maintenance of the sound-absorbing and vibration-damping panels to ensure that they are fully cured.

[0056] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as within the scope of protection of the present invention.

Claims

1. A rigid filled polyurethane sound absorption and vibration damping plate, characterized in that: The sound absorption and vibration reduction plate comprises a polyether-type soft foam polyurethane matrix (1), two rigid inclusions with openings are inserted in the middle of the polyether-type soft foam polyurethane matrix (1), the rigid inclusions are hard PVC tubes (2), and polyurethane (3) is filled in the hard PVC tubes (2) to form a sound absorption and vibration reduction plate; a rigid substrate (4) is provided below the polyether-type soft foam polyurethane matrix (1), and the opening direction of the hard PVC tube (2) is in a clockwise direction with the position of the rigid substrate (4) as the starting point; The inner radius of the rigid PVC tube (2) is 0.7 cm and the length is 40 cm. Two rigid PVC tubes (2) are inserted into the polyether soft foam polyurethane matrix (1), wherein the centers of the two rigid PVC tubes (2) are 2 cm apart. One of the rigid PVC tubes (2) is cut into a rectangular opening of 40 cm in length, 0.14 cm in width and 0.1 cm in height at π / 2 in the clockwise direction by laser, and the other rigid PVC tube (2) is cut into four rectangular openings of 40 cm in length, 0.14 cm in width and 0.1 cm in height at 0, π / 2, π and 3π / 2 in the clockwise direction by laser.

2. The rigid filled polyurethane sound absorption and vibration damping plate according to claim 1, characterized in that: The polyurethane (3) filled in the rigid PVC pipe (2) is the same polyurethane as the polyether-type soft foam polyurethane matrix (1); and the rigid substrate (4) is a floor or a wall.

3. The rigid filled polyurethane sound absorption and vibration damping plate according to claim 1, characterized in that: The vibration-absorbing and sound-insulating part of the sound-absorbing and vibration-damping plate is a polyether-type soft-foam polyurethane foam in a polyether-type soft-foam polyurethane matrix (1). The thickness of the polyether-type soft-foam polyurethane matrix (1) is 2 cm, and the porosity of the polyether-type soft-foam polyurethane matrix (1) is 95%.

4. The rigid filled polyurethane sound absorption and vibration damping plate according to claim 1, characterized in that: The polyether-type soft foam polyurethane matrix (1) is used as a matrix, and rigid inclusions, namely two rigid PVC tubes (2), are inserted therein. The rigid PVC tubes (2) are then filled with polyurethane (3) that is the same as the matrix material to form a unit body of 40*4*2 cm. The unit bodies are arranged periodically, and adjacent units are bonded by polyurethane hot melt adhesive to form a 40*40*2 cm sound absorption and vibration reduction board.

5. The rigid filled polyurethane sound absorption and vibration damping plate according to claim 1, characterized in that: A slit is provided every 2 cm at every 17 cm position along the entire length of the rigid PVC pipe (2).

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