KR101136031B1 - Sound-absorbing material and sound-proof wall employing it - Google Patents

Abstract

The present invention relates to a sound absorbing panel for a soundproof wall and a soundproof wall having the same, and more specifically, a sound absorbing material; And a sound absorbing panel for soundproof walls, and a soundproof wall having the same, having a plurality of aluminum perforated plates installed in the sound absorbing material in the direction of noise movement.

The sound absorbing panel is arranged so as to cross the arrangement of the sound absorbing holes to block the progress of sound waves, so that the sound absorbing properties are improved, can be applied to the soundproof wall, the sound absorbing panel of the sound room, the highway soundproof wall, etc. to prevent the noise between the floors of the apartment.

Sound Absorption Panel, Sound Insulation, Soundproof Wall

Description

Sound-absorbing panel for soundproof wall and soundproof wall provided therewith {SOUND-ABSORBING MATERIAL AND SOUND-PROOF WALL EMPLOYING IT}

The present invention relates to a soundproof wall for soundproof walls, which can be applied to soundproof walls, sound absorbing panels of sound rooms, highway soundproof walls, etc., which can improve the sound absorption characteristics by blocking the progress of sound waves, thereby preventing the inter-floor noise of apartments.

Noise and vibration pollution is one of the most frequently encountered pollution in daily life, and noise barriers are installed to create a pleasant and quiet environment by adding fatigue and stress to psychological, mental and physical.

Soundproof walls are walls that are installed to block or reduce noise from outside, and are installed around highways, residential areas, schools, and public facilities.

These sound barriers are made of materials that can absorb or block noise, and are classified into concrete sound barriers, transparent sound barriers, wooden sound barriers, and metal sound barriers.

Concrete soundproof wall is one of the typical soundproof walls that are still widely used, and has a structure that prevents sound propagation by reflecting noise. The concrete soundproof wall has a disadvantage of excellent durability and weather resistance, but low sound absorption, and recently, soundproof walls that have been provided with sound absorption by mixing cement and mineral wood fibers have recently appeared.

The transparent soundproof wall has a form in which a plastic transparent plate is fixed to a frame and reflects noise to exhibit soundproofing effect. The transparent sound insulation wall mainly uses polypropylene, has excellent sound absorption and sound insulation, and can use various aesthetics and can be easily reused. However, it is somewhat disadvantageous in terms of economics, it is necessary not only a careful design for wind and load, but also possible to secure sunshine right at the beginning of installation, but there is a problem that transparency performance is deteriorated with time.

The wood soundproof wall has a sound absorbing panel embedded between the circumferential wood and the plate wood, and the sound absorbing panel between the wood and the wood absorbs sound, and the soundproofing effect is excellent. The wood soundproof walls are environmentally friendly and have excellent sound absorption properties, but the metal soundproof walls are preferred in Japan and Korea because of the difficult maintenance.

The metal soundproof wall has a form in which a sound absorbing panel (sound absorbing panel or filler) is embedded in an iron plate or an aluminum plate. It is the most used soundproof wall in Korea and the thickness of soundproof wall is about 95 ~ 200mm and can be produced in various sizes. The front uses aluminum slit plate (1.0t) and the back and side is galvanized steel sheet (1.6t). Most of them are used.

As the sound absorbing panel, foamed aluminum, polyester, polyester / polyurethane, wood, glass wool, rock wool, etc. are used, and have a difference in density and thickness.

Among them, foamed aluminum is restricted to use in a large area due to high manufacturing cost, but much research is being conducted due to excellent sound absorption properties.

Korean Patent Laid-Open Publication No. 1998-87558 discloses a sound absorbing panel coated by rolling foamed aluminum to convert a closed bubble into an open bubble and forming various patterns on the surface thereof.

Korean Patent Laid-Open Publication No. 1998-87553 proposes an aluminum honeycomb by bonding an aluminum thin plate into a hexagonal honeycomb shape to produce an aluminum honeycomb, and then, by bonding a foamed aluminum having a plurality of bubbles to form a structural complex.

Korean Patent Laid-Open Publication No. 2007-20963 has been proposed for the production of sound-absorbing soundproof panels that are equipped with a foamed hole containing foamed aluminum to have excellent sound absorption and sound insulation, and to reduce production costs with little waste of materials.

In the case of glass wool as a sound absorbing panel, environmental pollution is caused by glass fiber or asbestos scattering dust, which is difficult to maintain in the case of wood. Therefore, the sound absorption is not high compared to other fillers, but due to the low cost and excellent heat insulating properties and low dust, polyester / polyurethane fillers are mainly used.

In the case of polyester / polyurethane fillers, the fiber mixing process is performed, followed by a carding process through a damper, followed by molding, needle punching, and mixing with a binder for thermal fusion. It is manufactured through.

Korean Patent Publication No. 2002-39070 discloses a fibrous web containing low melting polyester fibers as a surface layer, and a three-dimensional fibrous web composed of high melting point and low melting polyester fibers as an inner layer, and a high melting polyester. Reference is made to a sound absorbing panel of a multi-layered structure having a fibrous web containing fibers as a bottom layer.

In addition, studies on sound absorbing panels and sound barriers made of various materials have been actively conducted.

Korean Patent Publication No. 2003-32618 proposes a sound absorbing panel having a structure in which a foil having a perforated suction hole surrounds a sound absorbing material in order to suck noise inside an automobile. The patent mentions that the sound absorbing holes of perforated foils are formed by densely aligning left and right and up and down to increase sound absorption.

The conventional technology is to manufacture the sound absorbing panel to improve the sound absorbing properties of the soundproof wall, rather than to develop in terms of the material itself, but to structurally change or give irregularities to the surface through simple bonding between fillers having different sound absorbing properties. Attempts have been made to improve sound absorption through diversification of the design of the product surface.

However, there is a limit to the improvement of sound absorption characteristics of the sound absorbing panel through such a structural or surface design change and is not widely applied in practice.

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide a sound absorbing panel with improved sound absorbing properties by blocking the progress of sound waves.

It is another object of the present invention to provide a sound barrier provided with the sound absorbing panel.

In order to achieve the above object,

Sound absorbing material; And

Aluminum perforated plate installed in the sound absorbing material in the direction of noise movement

The sound absorption panel for soundproof walls provided is provided.

Moreover, this invention provides the soundproof wall provided with the said sound absorption panel.

The sound absorbing panel according to the present invention is arranged so that the sound absorbing holes are crossed with each other to block the progress of sound waves, so that the sound absorbing properties are improved, and thus the sound absorbing walls can be applied to soundproof walls, sound absorbing panels of sound rooms, highway soundproof walls, etc. .

Hereinafter, the present invention will be described in more detail.

The soundproof wall is manufactured in consideration of the sound absorption point, which is the location receiving the most noise, and the production is made considering the sound absorption rate of how much sound can be absorbed and the insertion loss of how much the noise passing through the wall is reduced. Accordingly, the present invention is to provide a sound absorbing panel and a soundproof wall having the same to ensure the excellent sound absorption characteristics and sound insulation as well as economic advantages.

1 is a cross-sectional view showing the structure of a sound absorbing panel according to the present invention,

1, the sound absorbing panel 10 includes a sound absorbing material 1; And the aluminum perforated plate 3 installed in the sound absorbing material 1 in the direction of noise movement.

The sound absorbing material may be any material of a sound absorbing material commonly used in the art, and is typically selected from the group consisting of polyester, polyethylene, polyurethane, copolymers thereof, mineral wool, and mixtures thereof. One kind is possible. Preferably polyester is used. The polyester is in the form of a fibrous web, and it is a material having excellent performance such as sound absorption as well as harmless to the human body, environmentally friendly, self-extinguishing, recycling, etc., which is not weathered even after prolonged exposure.

In particular, in the present invention, the aluminum perforated plate 3 is disposed inside the sound absorbing material in order to improve the sound absorbing properties of the sound absorbing panel 10 and to improve sound insulation.

Figure 2 is a schematic diagram showing the arrangement of the perforated plate.

As shown in FIG. 2, the aluminum perforated plate 3 has a shape in which a sound absorbing hole is formed in a predetermined size in a thin plate. The aluminum perforated plates 3a, 3b, and 3c are arranged in at least two or more inside the sound absorbing material 1, in particular, in the arrangement of the sound absorbing holes between the perforated plates 3a, 3b, and 3c, the primary perforated plate 3a. ), The sound absorbing hole of the) is not aligned with the sound absorbing hole of the secondary perforated plate 3b in the direction of sound wave propagation.

Figure 3 is a schematic diagram showing the soundproofing mechanism of the sound absorbing panel according to the present invention. Referring to FIG. 3, when sound waves are incident on a plurality of aluminum perforated plates 3a, 3b, and 3c installed, the sound absorbing holes of the primary perforated plate 3a are passed through an inconsistent arrangement between the sound absorbing holes as shown in FIG. 2. In the second perforated plate 3b, one sound wave is induced to touch the non-perforated point, thereby inducing diffuse reflection by blocking the progress of the sound wave. As a result, the sound absorbing properties of the sound absorbing panel 10 are improved, and the sound absorbing up to 2nd and 3rd in the sound absorbing material 1 as well as such primary sound absorbing is achieved.

The size, number, arrangement, formation methods, etc. of the sound absorbing holes formed in the aluminum perforated plate 3 can be modified and changed according to the field to be applied, which is appropriately selected and selected by a person skilled in the art. Can be.

For example, in the embodiment of the present invention, an aluminum perforated plate (thickness 0.3 mm) was installed at a thickness of 25 mm on a polyester sound absorbing material having a thickness of 50 mm, and the size of the sound absorbing hole of the aluminum perforated plate was 6 mm.

The aluminum perforated plate 3 proposed in the present invention has a sound absorption effect equivalent to or higher than that of expensive foamed aluminum prepared through conventional foaming, and at the same time, a production cost is lowered.

The sound absorbing panel according to the present invention has a noise reduction coefficient (NRC) defined as the average absorption ratio of the absorption ratios at 250, 500, 1000 and 2000 Hz of 0.600 or more and 0.680.

Referring to the preferred Experimental Example 1, it was confirmed that the case of the sound absorbing panel in which the aluminum perforated plate is inserted shows excellent sound absorption and effects compared to the non-absorbing panel, and is excellent in terms of noise reduction effect.

The method of manufacturing a sound absorbing panel having such a structure is not particularly limited in the present invention. For example, after preparing a plurality of sound absorbing materials and an aluminum perforated plate, respectively, the sound absorbing material / aluminum perforated plate may be laminated while adjusting the positions of the sound absorbing holes of the aluminum perforated plate. It is possible.

At this time, in order to increase the adhesive force between the sound absorbing material and the aluminum perforated plate, an adhesive such as acrylic resin, silicone resin or epoxy resin is used, and if necessary, pressurized.

The sound absorbing panel according to the present invention thus produced is preferably used as the sound absorbing panel (or sound insulating material) of the soundproof wall.

4 is a cross-sectional view showing the structure of the sound barrier according to the present invention.

Referring to FIG. 4, the sound absorbing wall has a sound absorbing panel 10 between the front plate 20 and the back plate 30.

The front and back plates 20 and 30 may be made of metal, plastic, tile, wood, and the like. For example, the front plate furnace 20 may be aluminum, and the back plate 30 may be a zinc steel plate. It is also possible to manufacture environmentally friendly plastics, preferably waste plastics, as needed.

Such a sound barrier is not particularly limited in the present invention and can be manufactured according to a known method for a sound barrier provided with a sound absorbing panel. Specifically, the obtained sound absorbing panel is manufactured through the step of fixing after insertion between the front plate and the back plate.

The manufactured soundproof walls can be applied to soundproof walls that can prevent noise between floors of apartments, sound absorbing panels of sound rooms, and highway soundproof walls.

Hereinafter, preferred embodiments of the present invention will be described in order to facilitate understanding of the present invention. However, the following examples are provided only for the purpose of easier understanding of the present invention, and the present invention is not limited by the examples.

(Example 1)

A polyester sound absorbing material (Atlon) of Φ 10 cm × 5 cm (thickness) was prepared, and an aluminum perforated plate (0.3 mm thick) coated with an adhesive on both surfaces was laminated between the sound absorbing materials. Then, the sound absorbing material and the aluminum perforated plate were laminated on the aluminum perforated plate, and three aluminum perforated plates were laminated at intervals of 25 mm between the sound absorbing materials. After the lamination, pressure was applied to produce a sound absorbing panel.

(Comparative Example 1)

The sound absorbing panel was manufactured only with the polyester sound absorbing material of Example 1.

(Experimental Example 1)

The change in sound absorption characteristics of the sound absorbing panels manufactured in Example 1 and Comparative Example 1 was measured through an impedance tube method.

Sound absorption characteristic change measurement

Referring to FIG. 5, it can be seen that the sound absorbing panel of Example 1 has improved sound absorption characteristics of about 13% in the low frequency and high frequency ranges of 250 to 2000 Hz, compared to the sound absorbing panel of Comparative Example 1, which is conventionally used commercially. Can be.

Noise reduction coefficient measurement

It is a table which shows the change of the noise reduction coefficient (NRC) of the sound absorption panel which concerns on Example 1 and Comparative Example 1. FIG. The noise reduction coefficient is defined as the average of the absorption ratios at 250, 500, 1000 and 2000 Hz.

Example 1 Comparative Example 1 Noise Reduction Factor 0.677 0.600

Referring to Table 1, in the case of the sound absorbing panel (Example 1) in which the aluminum perforated plate is laminated, it showed a better noise reduction effect than the sound absorbing panel (Comparative Example 1) not used.

The sound absorbing panel according to the present invention is arranged in a staggered arrangement of sound absorbing holes to block the progress of sound waves, so that the sound absorbing properties are improved, can be applied to soundproof walls, sound absorbing panels of sound rooms, highway soundproof walls, etc. Do.

1 is a cross-sectional view showing the structure of a sound absorbing panel according to the present invention.

Figure 2 is a schematic diagram showing the arrangement of the aluminum perforated plate according to the present invention.

3 is a cross-sectional view showing the soundproofing mechanism of the sound absorbing panel according to the present invention.

4 is a cross-sectional view showing the structure of the sound barrier according to the present invention.

5 is a graph showing the change in absorption ratio according to the frequency of the sound absorbing panels of Example 1 and Comparative Example 1.

Claims (5)

The fiber web made of polyester has a layered structure in several layers, Installing a plurality of aluminum perforated plate in the direction of noise movement between the layers of the fiber web, The plurality of aluminum perforated plate is a sound-absorbing panel for the soundproof wall is arranged so that the positions of the sound-absorbing holes in the perforated plate are staggered with each other. delete delete The method of claim 1, The sound absorbing panel for soundproof walls has a noise reduction coefficient (NRC) of 0.600 or more to 0.680. Soundproof wall provided with a sound absorbing panel according to claim 1.

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