Dust-free paper capable of absorbing sound and reducing noise

Abstract

The utility model discloses sound-absorbing and noise-reducing dust-free paper which comprises surface dust-free paper, a sound-absorbing layer and bottom dust-free paper which are sequentially arranged from top to bottom, antibacterial layers are arranged on the upper surface and the lower surface of the sound-absorbing layer, the sound-absorbing layer comprises a first metal layer, a plastic film layer and a second metal layer, mineral fiber layers are symmetrically arranged on the upper surface and the lower surface of the plastic film layer, and the mineral fiber layers are arranged on the first metal layer. One side, far away from the plastic film layer, of the mineral fiber layer is filled with sound-absorbing particles; the dust-free paper disclosed by the utility model has good sound-absorbing and noise-reducing functions, and can absorb and weaken noise through the matching action of the first metal layer, the second metal layer, the plastic film layer, the mineral fiber layer and the sound-absorbing particles, so that the dust-free paper shows good sound-absorbing and noise-reducing effects, can effectively reduce environmental noise, and has a good sound-absorbing and noise-reducing effect. The antibacterial layers are arranged on the upper surface and the lower surface of the sound absorption layer, so that growth of microorganisms such as bacteria and molds is effectively inhibited, and the hygienic performance of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dust-free paper, and particularly relates to a dust-free paper with sound absorption and noise reduction functions. Background Art

[0002] Dust-free paper, also known as dry-process papermaking non-woven fabric, is mainly structured by orienting or randomly arranging textile short fibers or filaments to form a fiber web structure, and then strengthening it by mechanical, thermal bonding or chemical methods. The main manufacturing method of dust-free paper is as follows: using pure wood pulp fibers as raw materials, after the fibers are formed into a web by air flow, a water-soluble binder is sprayed and baked to strengthen it into a fabric. In addition, a certain proportion of hot-melt fibers are mixed into the fluff pulp fibers, and after being formed into a web by air flow, the low-melting-point fibers in the fiber web are melted by hot air or hot rolling to strengthen the fiber web. At present, through the functional research and development of dust-free paper, the preparation of functional dust-free paper generally involves compounding a functional layer structure on the finished product of dust-free paper, so that the dust-free paper has corresponding functions such as antibacterial, tear-resistant, strong absorption, and anti-static.

[0003] Based on the above situation, the patent with the publication number CN209128805U discloses an antibacterial dust-free paper, which includes a dust-free paper main body composed of wood pulp fibers and polyethylene fibers. An antibacterial liquid is sprayed on the dust-free paper main body and dried at high temperature, so that the antibacterial agent forms an antibacterial layer coating on the dust-free paper main body, and the dust-free paper has good antibacterial function; the patent with the publication number CN218399687U discloses a new type of dust-free paper, which includes a water-absorbing cotton and a dust-free paper body sleeved outside the water-absorbing cotton, and an accommodation cavity is arranged inside the dust-free paper body, and the water-absorbing cotton is located inside the accommodation cavity. Through the cooperation of the water-absorbing cotton and the accommodation cavity, the dust-free paper has good water absorption capacity.

[0004] In places such as family studies, offices where a quiet environment is required, and in scenarios such as the operating environment of precision equipment in laboratories, it is necessary to control noise to ensure the normal progress of daily study and life and the stability of the operation of precision equipment. However, these dust-free papers do not meet the noise reduction requirements of the above environments. Structurally, these dust-free papers cannot effectively absorb and weaken noise, and their functions mainly serve to improve the wiping effect of the dust-free paper, which to a certain extent limits the usage scenarios of the dust-free paper. Summary of the Utility Model

[0005] Aiming at the technical defects in the background art, the utility model proposes a dust-free paper with sound absorption and noise reduction functions, which solves the above technical problems and meets the actual needs. The specific technical solutions are as follows:

[0006] A dust-free paper for sound absorption and noise reduction, comprising a surface dust-free paper, a sound absorption layer and a bottom dust-free paper arranged in sequence from top to bottom. Antibacterial layers are arranged on the upper and lower surfaces of the sound absorption layer. The sound absorption layer includes a first metal layer, a plastic film layer and a second metal layer, and the first metal layer, the plastic film layer and the second metal layer are arranged in sequence from top to bottom. Mineral fiber layers are symmetrically arranged on the upper and lower surfaces of the plastic film layer, and sound absorption particles are filled on the side of the mineral fiber layer away from the plastic film layer.

[0007] Further, the cross-section of the mineral fiber layer is wavy. A sound absorption groove is arranged on the side of the mineral fiber layer close to the plastic film layer, and a filling groove is arranged on the side of the mineral fiber layer away from the plastic film layer. The sound absorption particles are filled in the sound absorption groove.

[0008] Further, the sound absorption grooves are symmetrically distributed on the upper and lower sides of the plastic film layer, and the sound absorption grooves and the plastic film layer enclose a sound absorption cavity.

[0009] Further, the antibacterial layer is any one of a quaternary ammonium salt cationic antibacterial agent coating, a polyhexamethylene biguanide hydrochloride coating or a silver ion antibacterial coating.

[0010] Further, the material of the mineral fiber layer is any one of basalt fiber and mineral wool fiber.

[0011] Further, the second metal layer and the first metal layer are any one of an aluminum foil layer, a copper foil layer or a gold foil layer.

[0012] Further, the plastic film layer is any one of a polypropylene film layer and a polyurethane film layer, and the sound absorption particles are selected as porous perlite particles with a particle size of 100-200 microns.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The dust-free paper of the present utility model has good sound absorption and noise reduction functions. Through the combined action of the first metal layer, the second metal layer, the plastic film layer, the mineral fiber layer and the sound absorption particles, noise can be attenuated and dissipated, so that the dust-free paper shows good sound absorption effect, can effectively reduce environmental noise, improve the quietness of the use place. At the same time, the first metal layer, the second metal layer, the plastic film layer and the mineral fiber layer can effectively increase the structural strength of the dust-free paper, can effectively improve the durability of the dust-free paper, increase the service life of the dust-free paper. The antibacterial layers arranged on the upper and lower surfaces of the sound absorption layer can effectively inhibit the growth of microorganisms such as bacteria and molds, and improve the hygienic performance of the product. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the present utility model.

[0016] Reference numerals: surface dust-free paper 1, sound-absorbing layer 2, first metal layer 21, mineral fiber layer 22, filling groove 221, sound-absorbing groove 222, plastic film layer 23, second metal layer 24, sound-absorbing particles 25, sound-absorbing cavity 26, bottom dust-free paper 3, antibacterial layer 4. Detailed implementation manners

[0017] The implementation manners of the present utility model will be described below in conjunction with the accompanying drawings and related embodiments. The implementation manners of the present utility model are not limited to the following embodiments, and the related necessary components of the present utility model in the technical field should be regarded as well-known technologies in the technical field, which can be known and mastered by those skilled in the technical field.

[0018] As Figure 1 shown, a sound-absorbing and noise-reducing dust-free paper includes a surface dust-free paper 1, a sound-absorbing layer 2, and a bottom dust-free paper 3 arranged in sequence from top to bottom. An antibacterial layer 4 is provided on the upper and lower surfaces of the sound-absorbing layer 2. The sound-absorbing layer 2 includes a first metal layer 21, a plastic film layer 23, and a first metal layer 21. The first metal layer 21, the plastic film layer 23, and the second metal layer 24 are arranged in sequence from top to bottom. Mineral fiber layers 22 are symmetrically arranged on the upper and lower surfaces of the plastic film layer 23. Sound-absorbing particles 25 are filled on the side of the mineral fiber layer 22 away from the plastic film layer 23.

[0019] The cross-section of the mineral fiber layer 22 is wavy. A sound-absorbing groove 222 is provided on the side of the mineral fiber layer 22 close to the plastic film layer 23, and a filling groove 221 is provided on the side of the mineral fiber layer 22 away from the plastic film layer 23. The sound-absorbing particles 25 are filled in the sound-absorbing groove 222. The sound-absorbing grooves 222 are symmetrically distributed on the upper and lower sides of the plastic film layer 23. The sound-absorbing grooves 222 and the plastic film layer 23 enclose a sound-absorbing cavity 26.

[0020] The present utility model adopts a multi-layer structure design for the dust-free paper, achieving a good sound-absorbing and noise-reducing effect, enhancing the structural stability, and effectively absorbing and reducing noise through the synergistic effect of the characteristics of each layer of materials. The surface dust-free paper 1 and the bottom dust-free paper 3 can provide a good touch and basic cleaning ability for the dust-free paper, and also have a certain sound-absorbing ability, which can absorb part of the sound wave energy and reduce the transmission of sound waves. The sound-absorbing layer 2 is the main functional layer for sound absorption and noise reduction. Through the synergistic effect of the first metal layer 21, the plastic film layer 23, the second metal layer 24, the mineral fiber layer 22, and the sound-absorbing particles 25, the noise can be absorbed to achieve a noise reduction effect.

[0021] In the combination of the first metal layer 21, the second metal layer 24 and the plastic film layer 23 of the sound-absorbing layer 2, the first metal layer 21 and the second metal layer 24 have a reflecting effect on sound waves, while the plastic film layer 23 serves as a separating layer to prevent the direct penetration of sound waves. Specifically, the density and vibration attenuation characteristics of the first metal layer 21 and the second metal layer 24 cause sound waves to be reflected when encountering the first metal layer 21 and the second metal layer 24. At the same time, the setting of the two metal layers further enhances this reflection effect. The plastic film layer 23, as a separating layer of sound waves, can prevent the direct penetration of sound waves and can jointly form a sound-absorbing cavity 26 with the sound-absorbing grooves 222 of the mineral fiber layer 22, causing the sound waves to resonate and dissipate in the cavity, thereby achieving good sound absorption and noise reduction effects.

[0022] The wavy structure of the mineral fiber layer 22 cooperates with the sound-absorbing particles 25 to increase the propagation path of sound waves and absorb the energy of sound waves to achieve an efficient sound absorption effect. Specifically, the cross-section of the mineral fiber layer 22 is wavy, increasing the propagation path length of sound waves in the mineral fiber layer 22, causing the sound waves to form multiple reflections and scatterings on the wavy structure of the mineral fiber layer 22, thereby consuming the energy of the sound waves through the multiple reflection and scattering processes, and thus reducing the intensity of the sound waves. The sound-absorbing grooves 222 enable the sound waves to enter and resonate and dissipate in the grooves. At the same time, the sound-absorbing particles 25 filled in the filling grooves 221 can further absorb the sound waves; the sound-absorbing cavity 26 formed by enclosing the sound-absorbing grooves 222 and the plastic film layer 23 provides an additional resonance space for the sound waves. When the sound waves resonate in the cavity, the sound waves are further consumed and dissipated.

[0023] The utility model has good antibacterial and dust-free functions. The antibacterial layer 4 endows the dust-free paper with antibacterial function. The antibacterial material in the antibacterial layer 4 can destroy the cell structure of bacteria and other microorganisms or inhibit their growth and reproduction, which helps to keep the dust-free paper clean and hygienic and prevent the breeding of bacteria and other microorganisms; the surface dust-free paper 1 and the bottom dust-free paper 3 make the surface of the utility model flat, without capillary pores and not easy to generate debris and dust, thus maintaining good cleanliness.

[0024] The dust-free paper of the utility model can be applied to occasions where the indoor sound environment needs to be improved or noise control is required. When applied, the dust-free paper can be combined with sound-absorbing materials such as sound-absorbing cotton to form a composite sound absorber, further improving the sound absorption and noise reduction ability and enhancing the quietness of the environment. Through the first metal layer, the second metal layer, the plastic film layer, and the mineral fiber layer, the dust-free paper has good structural strength and durability equivalent to that of conventional wallpaper. Therefore, it can also be used alone for the decoration of interior walls and ceilings of buildings, effectively absorbing indoor noise and enhancing the comfort of the living or working environment.

[0025] Meanwhile, the dust-free paper of the present utility model can also be used in places such as laboratories where high requirements are placed on cleanliness and noise control. There are many precision instruments operating in the laboratory. Precision instruments rely on tiny mechanical movements or optical paths during operation. The noise in the laboratory will, to a certain extent, cause tiny vibrations inside the precision instruments, resulting in a decrease in measurement accuracy. When the dust-free paper of the present utility model is applied in the laboratory, on the one hand, it can be used to wipe precision instruments, and on the other hand, it can absorb the noise generated during the operation of the instruments to a certain extent, keep the indoor environment quiet, and reduce the impact of noise on the measurement work of precision equipment.

[0026] As one of the preferred embodiments of the present utility model, the antibacterial layer 4 is any one of a quaternary ammonium salt cationic antibacterial agent coating, a polyhexamethylene biguanide hydrochloride coating, or a silver ion antibacterial coating.

[0027] The antibacterial layer 4 can provide good antibacterial ability for the dust-free paper, and can avoid mildew or bacterial growth when in a humid environment. The antibacterial layer 4 is preferably a silver ion antibacterial coating in terms of material. Compared with the quaternary ammonium salt cationic antibacterial agent coating and the polyhexamethylene biguanide hydrochloride coating, the silver ion antibacterial coating is preferably used as the antibacterial layer 4 of the dust-free paper mainly because silver ions have broad-spectrum antibacterial properties, have strong killing and inhibitory effects on a variety of bacteria, fungi, and viruses, and have good persistence and are not easily resistant to drugs. In addition, the silver ion antibacterial coating also has the advantages of high safety, strong stability, and no toxic side effects, and can more effectively protect the dust-free paper from mildew and bacterial growth in a humid environment. Although the quaternary ammonium salt cationic antibacterial agent also has good antibacterial effects, its environmental stability is relatively poor; polyhexamethylene biguanide hydrochloride may show certain irritation under certain conditions. Therefore, considering factors such as antibacterial effect, persistence, safety, and environmental stability, the silver ion antibacterial coating is a more ideal choice.

[0028] As one of the preferred embodiments of the present utility model, the mineral fiber layer 22 is made of any one of basalt fiber and mineral wool fiber.

[0029] The mineral fiber layer 22 is preferably basalt fiber. Specifically, the length of the basalt fiber is 5 - 12 mm, and the diameter is 5 - 20 microns. The basalt fiber has the characteristics of high strength and high modulus. When used as the mineral fiber layer 22, it can provide better structural support and stability for the overall non-woven paper. The high strength enables the overall non-woven paper to withstand greater external forces without being easily damaged, and the high modulus ensures that its deformation under force is small, thus maintaining the integrity of the structure. At the same time, the continuous basalt fiber has excellent sound insulation and sound absorption properties. The continuous basalt fiber forms a porous structure within the mineral fiber layer 22. When sound waves enter the mineral fiber layer 22, the vibration of the sound waves drives the air material within the pores of the mineral fiber layer 22 to move and friction occurs with the pore walls. Through the action of friction and viscous force, the vast majority of the sound energy is converted into heat energy, thereby attenuating the sound waves and making the reflected sound weaker, achieving the purpose of sound absorption.

[0030] As one of the preferred embodiments of the present utility model, the second metal layer 24 and the first metal layer 21 are any one of an aluminum foil layer, a copper foil layer, or a gold foil layer.

[0031] The second metal layer 24 and the first metal layer 21 are preferably aluminum foil layers. The aluminum foil layer, copper foil layer, or gold foil layer can all weaken the reflection of sound waves. However, compared with copper foil and gold foil, aluminum foil has an advantage in cost and can reduce the overall cost. At the same time, the density of aluminum foil is much lower than that of copper foil and gold foil. Therefore, the aluminum foil layer has better lightweight characteristics and can effectively control the overall weight of the non-woven paper. Aluminum foil has good ductility and plasticity, making the aluminum foil have sufficient softness. When applied to the non-woven paper structure, it can, to a certain extent, reduce the impact on the overall softness of the non-woven paper.

[0032] As one of the preferred embodiments of the present utility model, the plastic film layer 23 is any one of a polypropylene film layer or a polyurethane film layer, and the sound-absorbing particles 25 are selected as porous perlite particles with a particle size of 100 - 200 microns.

[0033] The plastic film layer 23 is preferably a polyurethane film layer. The polyurethane film has good flexibility and high tear resistance, which can effectively increase the overall structural strength of the non-woven paper. The good flexibility and sealing property of the polyurethane film contribute to enhancing the sound absorption effect of the overall structure.

[0034] Due to its porosity, the porous perlite particles can cause multiple reflections, refractions, and scatterings when sound waves enter, thereby effectively weakening the sound wave energy and achieving excellent sound absorption effects. This is beneficial for application scenarios that require reducing noise pollution and improving space comfort. At the same time, the density of the perlite particles is relatively low and will not significantly increase the weight of the overall structure. The perlite particles have good durability and can maintain stable sound absorption performance for a long time.

[0035] The polyurethane film layer and the porous perlite particles have a synergistic effect on the sound absorption function. The polyurethane film layer can provide good sealing and flexibility, while the porous perlite particles can directly absorb the sound wave energy. The combination of the two can significantly improve the sound absorption effect of the overall structure. The combination of the polyurethane film layer and the porous perlite particles can achieve broadband absorption of sound waves with different frequencies, thereby more effectively reducing environmental noise pollution.

[0036] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A dust-free paper for sound absorption and noise reduction, characterized in that: The invention comprises a surface layer of dust-free paper (1), a sound-absorbing layer (2) and a bottom layer of dust-free paper (3) which are arranged in sequence from top to bottom; an antibacterial layer (4) is arranged on the upper and lower surfaces of the sound-absorbing layer (2); the sound-absorbing layer (2) comprises a first metal layer (21), a plastic film layer (23), and a first metal layer (21); the first metal layer (21), the plastic film layer (23), and the second metal layer (24) are arranged in sequence from top to bottom; a mineral fiber layer (22) is symmetrically arranged on the upper and lower surfaces of the plastic film layer (23); and sound-absorbing particles (25) are filled on the side of the mineral fiber layer (22) away from the plastic film layer (23).

2. The dust-free paper for sound absorption and noise reduction according to claim 1, characterized in that: The cross section of the mineral fiber layer (22) is wavy, a sound absorbing groove (222) is provided on a side of the mineral fiber layer (22) close to the plastic film layer (23), and a filling groove (221) is provided on a side of the mineral fiber layer (22) away from the plastic film layer (23), and the sound absorbing particles (25) are filled in the sound absorbing groove (222).

3. The dust-free paper for sound absorption and noise reduction according to claim 2, characterized in that: The sound absorbing grooves (222) are symmetrically distributed on the upper and lower sides of the plastic film layer (23); the sound absorbing grooves (222) and the plastic film layer (23) enclose a sound absorbing cavity (26).

4. The dust-free paper for sound absorption and noise reduction according to claim 1, characterized in that: The antibacterial layer (4) is any one of a quaternary ammonium salt cationic antibacterial agent coating, a polyhexamethylene biguanide hydrochloride coating or a silver ion antibacterial coating.

5. The dust-free paper for sound absorption and noise reduction according to claim 1, characterized in that: The material of the mineral fiber layer (22) is any one of basalt fiber and mineral wool fiber.

6. The dust-free paper for sound absorption and noise reduction according to claim 1, characterized in that: The second metal layer (24) and the first metal layer (21) are any one of an aluminum foil layer, a copper foil layer or a gold foil layer.

7. The dust-free paper for sound absorption and noise reduction according to claim 1, characterized in that: The plastic film layer (23) is any one of a polypropylene film layer and a polyurethane film layer, and the sound-absorbing particles (25) are porous pearlite particles with a particle size of 100-200 microns.

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