Sound-absorbing and sound-proofing partition material

Abstract

To provide a sound absorption and insulation partition material with excellent sound absorption and sound insulation properties from a low frequency range to a high frequency range even with a total thickness of 40 mm or less.SOLUTION: A sound absorption and insulation partition material 1 has a four-layer structure consisting of a first layer 10 made of a porous material on a sound source side, a second layer 20 made of a non-breathable resin membrane laminated on the first layer 10, a third layer 30 made of an elastic body laminated on the second layer 20, and a fourth layer 40 made of a non-breathable resin membrane laminated on the third layer 30. The first layer 10 has a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm2 / s, the second layer 20 has a thickness of 0.2 to 1.0 mm, and combined areal density of the first layer 10 and the second layer 20 is 0.50 to 1.80 kg / m2. The third layer 30 has a thickness of 10 mm or more and a 25% compressive hardness of 200 N or less, the fourth layer 40 has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m2 or more, and a total thickness T is 40 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a sound-absorbing and sound-insulating partition material. [Background technology]

[0002] Most partition materials used to separate indoor spaces are primarily designed to block views, and have been inadequate in terms of soundproofing and sound absorption. Recently, there has been an increasing demand for partition materials with soundproofing properties, in order to protect privacy in evacuation shelters during disasters and to accommodate more diverse work styles, such as teleworking and free address systems. For example, the partition material (screen) disclosed in Patent Document 1 is a folding screen in which a plurality of wall sections have hinge sections between adjacent walls to form a self-standing screen, and the wall sections have a base section and a sound-absorbing section. For example, the base section has a thickness of 3 to 10 mm and a density of 150 to 500 kg / m 3 The sound absorbing part is made of a polymer foam resin with a thickness of 4 to 100 mm and a density of 20 to 100 kg / m 3 It is made of foamed resin, woven fabric, or nonwoven fabric, which is said to provide visibility blocking and sound absorption effects. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2019-196640 Summary of the Invention [Problem to be solved by the invention]

[0004] On the other hand, noise generated indoors has a wide frequency range, from 500 to 4000 Hz, and the partition in Patent Document 1 is primarily designed to absorb sound around 1 kHz, but its sound absorption properties for frequency ranges other than around 1 kHz are not necessarily clear. This creates the problem that in order to ensure sound absorption, it is necessary to increase the total thickness of the wall and sound-absorbing parts.

[0005] The present invention was made in consideration of such problems, and aims to provide a sound-absorbing and sound-insulating partition material that has excellent sound absorption and sound insulation properties from low to high frequency ranges, even when the total thickness is thin, at 40 mm or less. [Means for solving the problem]

[0006] The sound-absorbing and sound-insulating partition material of the present invention that solves the above problems is as follows: A first layer made of a porous material on the sound source side, a second layer made of a non-breathable resin film laminated on the first layer; a third layer made of an elastic material laminated on the second layer; A four-layer structure consisting of a fourth layer made of a non-breathable resin film laminated on the third layer, The first layer has a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm 2 / s, The second layer has a thickness of 0.2 to 1.0 mm, The combined areal density of the first layer and the second layer is 0.59 ~1.80kg / m 2 It is said that, The third layer has a thickness of 10 mm or more and a 25% compression hardness of 200 N or less. Polyurethane foam It is said that, The fourth layer has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m 2 That is all, The total thickness is 40 mm or less. R, The sound absorption coefficient based on JIS A 1405 is 0.5 or more in the 500Hz frequency range. It is characterized by: [Effects of the Invention]

[0007] According to the present invention, even if the total thickness is thin, at 40 mm or less, it is possible to obtain a sound absorbing and insulating partition material that has excellent sound absorbing and insulating properties from low to high frequency ranges. [Brief explanation of the drawings]

[0008] [Figure 1]1 is a schematic cross-sectional view of one embodiment of the sound-absorbing and sound-insulating partition material of the present invention. [Figure 2] FIG. 2 is an explanatory diagram showing the sound absorption characteristics of the flexible polyurethane foam shown in Reference Example 1. [Figure 3] 10 is an explanatory diagram showing the sound absorption characteristics of the resin film / spring part / resin film structure shown in Comparative Example 1. FIG. [Figure 4] FIG. 2 is an explanatory diagram of the sound absorption characteristics of Example 1 according to one embodiment of the sound absorbing and insulating partition material of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the sound absorbing and insulating partition material of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the sound absorbing and insulating partition material 1 of the present invention is a porous material on the sound source side having an air permeability of 1 to 70 ml / cm 2 The four-layer structure is composed of a first layer 10 made of soft polyurethane foam of 1 / s, a second layer 20 made of vinyl chloride resin film as an air-impermeable resin film laminated on the first layer 10, a third layer 30 made of soft polyurethane foam as an elastic body laminated on the second layer 20, and a fourth layer 40 made of vinyl chloride resin film as an air-impermeable resin film laminated on the third layer 30, and has a total thickness T of 40 mm or less.

[0010] In the sound-absorbing and insulating partition material 1, each of the layers 10 to 40 of the four-layer structure has a first layer 10 and a second layer 20 that together form a first mass portion 2, a third layer 30 that functions as a spring portion 3, and a fourth layer 40 that forms a second mass portion 4. In other words, the sound-absorbing and insulating partition material 1 has a structure that includes a spring portion 3 between the first mass portion 2 and the second mass portion 4. The sound-absorbing and sound-proof partition material 1 combines high-frequency sound absorption due to the soft polyurethane foam with a specific air permeability in the first layer 10, and low-frequency sound absorption due to the spring-mass structure with a spring section 3 between the first mass section 2 and the second mass section 4. This ensures sound absorption across the low to high frequency range of 500 to 4000 Hz, while also ensuring sound insulation with a transmission loss of 10 dB or more in the same frequency range.

[0011] In the sound-absorbing and sound-insulating partition material 1, the first layer 10 has a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm 2 The first layer 10 and the second layer 20 are made of a flexible polyurethane foam having a density of 0.2 to 1.0 mm, and the second layer 20 is made of a vinyl chloride resin film having a thickness of 0.2 to 1.0 mm. The first layer 10 and the second layer 20 form a first mass part 2, and the total surface density of the first mass part 2 is 0.50 to 1.80 kg / m. 2 The third layer 30 is made of a soft polyurethane foam having a thickness of 10 mm or more and a 25% compression hardness of 200 N or less, and constitutes the spring portion 3, and the fourth layer 40 is made of a soft polyurethane foam having a thickness of 0.7 mm or more and a surface density of 0.80 kg / m 2 The vinyl chloride resin film of the above constitutes the second mass part 4. In addition to this, the sound absorbing and insulating partition material 1 has a total thickness T of 40 mm or less. The total thickness T is determined mainly by the thickness of the first layer 10, which is 15 mm or more, and the third layer 30, which is 10 mm or more, but it is sufficient if the total thickness of the vinyl chloride resin film of the second layer 20 and the fourth layer 40 is 40 mm or less. For example, the thickness of the first layer 10 may be approximately 30 mm. The thickness of each of the layers 10 to 40 is not particularly limited and can be determined appropriately, and a thin sound absorbing and insulating partition material 1 can be obtained by setting the total thickness T to 40 mm or less.

[0012] The sound-absorbing and sound-insulating partition material 1 is made of soft polyurethane foam with a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm. 2 The first layer 10 with an air permeability of 70 ml / cm 3 or more has excellent sound absorption properties in the high frequency range. The lower the air permeability, the better the sound absorption properties tend to be. By setting the air permeability in the above range, sound absorption properties in the high frequency range can be ensured, and the air permeability of 70 ml / cm 3 or more is excellent. 2 If the value exceeds / s, it becomes difficult to ensure sound absorption. Furthermore, unless the thickness of the first layer 10 is 15 mm or more, it is difficult to achieve a sound absorption coefficient (normal incidence sound absorption coefficient measured according to JISA1405) of 0.5 or more across the low frequency range of 500 to 4000 Hz to the high frequency range. The porous body constituting the first layer 10 of the present invention has an air permeability of 1 to 70 ml / cm as measured in accordance with JIS K 6400-7. 2Any material may be used, including soft polyurethane foam, other resin foams, nonwoven fabric, felt, glass wool, and a three-dimensional network structure made of entangled thermoplastic resin threads.

[0013] In the sound absorbing and insulating partition material 1, the second layer 20, which is made of a non-breathable vinyl chloride resin film and has a thickness of 0.2 to 1.0 mm, and the first layer 10 constitute the first mass part 2. The first mass part 2, which is made up of the first layer 10 and the second layer 20, has an overall surface density of 0.50 to 1.80 kg / m 2 The surface density is 0.50 kg / m 2 If it is less than this, the sound absorption coefficient around 500Hz will be 0.5 or less, and it will be 1.80kg / m 2 If it exceeds this value, the sound absorption coefficient around 1000Hz will be 0.5 or less. The resin film constituting the second layer 20 of the present invention may be vinyl chloride resin or other thermoplastic resin, or may be non-breathable, such as a composite (tarpaulin) of a thermoplastic resin and a fiber substrate.

[0014] On the other hand, the third layer 30 constitutes the spring portion 3 and is made of soft polyurethane foam with a thickness of 10 mm or more and a 25% compression hardness of 200 N or less. With this thickness and compression hardness, the spring-mass structure with the spring portion 3 between the first mass portion 2 and the second mass portion 4 (described later) converts the vibration energy of sound into thermal energy, thereby absorbing the sound. In the present invention, the 25% compression hardness is a value measured in accordance with JIS K 6400-2. The elastic body constituting the third layer 30 of the present invention may be a soft polyurethane foam or other resin foam, or may be a nonwoven fabric, felt, glass wool, or a three-dimensional network structure formed by entangling thermoplastic resin threads.

[0015] The fourth layer 40 made of a vinyl chloride resin film has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m 2 The fourth layer 40 has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m 2If the thickness is less than this, sound insulation cannot be ensured, and it is difficult to achieve a transmission loss of 10 dB or more in the frequency range of 500 to 4000 Hz. In addition, the spring-mass structure with the spring portion 3 between the first mass portion 2 and the second mass portion 4 provides sound absorption characteristics, resulting in excellent sound absorption properties from the low frequency range of 500 to 4000 Hz to the high frequency range, and also exhibiting sound insulation properties in the same frequency range. The resin film constituting the fourth layer 40 of the present invention may be vinyl chloride resin or other thermoplastic resin, or may be non-breathable, such as a composite (tarpaulin) of a thermoplastic resin and a fiber substrate.

[0016] In the second layer 20 and the fourth layer 40, the second layer 20 is a thin film having a thickness of 0.2 to 1.0 mm, and the fourth layer 40 is a thick film having a thickness of 0.7 mm or more, but the thickness may be within the above range, and the second layer 20 and the fourth layer 40 may be resin films of the same thickness.

[0017] The sound absorbing and insulating partition material 1 having such a four-layer structure is only required to be laminated so that the layers 10 to 40 are in contact with each other, and are fixed with an adhesive or the like as necessary. Furthermore, the sound-absorbing and sound-proofing partition material 1 may be used in any manner, such as by being freestanding using frame members or leg members, by being completely covered with a cover material, or by being stored in a mesh or bag-like cover material.

[0018] The sound-absorbing and sound-proof partition material 1 is constructed with a four-layer structure consisting of a first layer 10 to a fourth layer 40, and therefore combines high-frequency sound absorption properties due to the soft polyurethane foam with a specific air permeability in the first layer 10, and low-frequency sound absorption properties due to the spring mass structure having a spring portion 3 between the first mass portion 2 and the second mass portion 4. As a result, the sound absorbing and insulating partition material 1 has excellent sound absorption properties from the low frequency range of 500 Hz to the high frequency range of 4000 Hz, and can achieve a sound absorption coefficient of 0.5 or more, as shown in Fig. 4 which explains the sound absorption characteristics of Example 1. At the same time, the sound absorbing and insulating partition material 1 also has excellent sound insulation properties, with a transmission loss of 10 dB or more in the same frequency range. Therefore, the sound absorbing and insulating partition material 1 has a total thickness T of 40 mm or less, a sound absorption coefficient of 0.5 or more in all frequency ranges of 500, 1000, 2000, and 4000 Hz, and sound insulation properties with a transmission loss of 10 dB or more. Furthermore, the sound-absorbing and sound-proofing partition material 1 not only blocks views but also has sound-proofing and sound-absorbing properties, and can be used for a wide range of purposes, such as protecting privacy in evacuation shelters during disasters, and dividing up indoor spaces for teleworking and free address systems. [Example]

[0019] Next, examples of the present invention will be described together with comparative examples, but these examples do not limit the present invention in any way. Below, the sound absorption coefficient and transmission loss of the sound absorbing and insulating partition material 1 for Examples 1 to 5, Comparative Examples 1 to 9, and Reference Example 1 were measured, and the sound absorption and sound insulation properties were evaluated, and the results are shown in Tables 1 and 2. Furthermore, for Example 1, Comparative Example 1, and Reference Example 1, the measurement results of the sound absorption coefficient are graphed and shown in Figures 2 to 4. The materials shown in the table are as follows, and different thicknesses were prepared and used. <Material> Flexible polyurethane foam A: Achilles Corporation, product name "Achilles Airon PPK", density 23 kg / m 3 , air permeability 30ml / cm 2 / s Flexible polyurethane foam B: Achilles Corporation, product name "Achilles Airon HD", density 20 kg / m 3 , air permeability 100ml / cm 2 / s, 25% compression hardness 115N Flexible polyurethane foam C: Achilles Corporation, product name "Achilles Airon ZM", density 65 kg / m 3 , 25% compression hardness 300N Vinyl chloride resin film A: density 1200 kg / m 3 Vinyl chloride resin film B: Tarpaulin, density 1200 kg / m 3

[0020] <Sound absorption evaluation> Sound absorption was evaluated based on the normal incidence sound absorption coefficient measured in accordance with JIS A 1405. At this time, sound absorption coefficients were measured at frequencies of 500 Hz, 1000 Hz, 2000 Hz, and 4000 Hz. The results were evaluated as follows: a sound absorption coefficient of 0.7 or higher was rated as ◎, a sound absorption coefficient of 0.5 or higher but less than 0.7 was rated ○, and a sound absorption coefficient of less than 0.5 was rated ×. For the overall evaluation, a ◎ or ○ score for all sound absorption values ​​between 500 and 4000 Hz was considered a pass, and an × score for any sound absorption value was considered a fail.

[0021] <Sound insulation evaluation> Sound insulation was evaluated by measuring transmission loss based on ASTM E 2611, with 40 dB or more being rated as ◎, 10 dB or more but less than 40 dB being ○, and less than 10 dB being ×. For the overall evaluation, a ◎ or ○ for all sound insulation between 500 and 4000 Hz was considered a pass, and an × for any sound insulation between 500 and 4000 Hz was considered a fail.

[0022] Example 1 The first layer 10 constituting the first mass portion (first and second layers) 2 has a thickness of 20 mm and an areal density of 0.46 kg / m 2 The second layer 20 is made of flexible polyurethane foam A having a thickness of 0.2 mm and an areal density of 0.24 kg / m 2 The vinyl chloride resin film A had a thickness of 20.2 mm and an areal density of 0.70 kg / m 2 This becomes: The third layer 30 constituting the spring portion 3 has a thickness of 10 mm and an areal density of 0.20 kg / m 2 The result was named flexible polyurethane foam B. The fourth layer 40 constituting the second mass portion 4 has a thickness of 1 mm and an areal density of 1.20 kg / m2 The vinyl chloride resin film was named B. The total thickness T of the sound-absorbing and sound-insulating partition material 1 is 31.2 mm, and the total surface density is 2.10 kg / m 2 is. This sound absorbing and insulating partition material 1 had sound absorption of 0.7 or more in all frequency ranges, which was a passing grade of ⊚, and sound insulation of this material was also passing grades of ◯ or ⊚ in all frequency ranges.

[0023] <Example 2> The first layer 10 constituting the first mass portion (first layer and second layer) 2 has a thickness of 15 mm and an areal density of 0.35 kg / m 2 The second layer 20 is made of flexible polyurethane foam A having a thickness of 1 mm and an areal density of 1.20 kg / m 2 The vinyl chloride resin film B was the first mass portion, with a thickness of 16 mm and an areal density of 1.55 kg / m 2 The third layer 30 constituting the spring portion 3 has a thickness of 15 mm and an areal density of 0.30 kg / m 2 The result was named flexible polyurethane foam B. The fourth layer 40 constituting the second mass portion 4 was the same as that in Example 1. The total thickness T of the sound absorbing and insulating partition material 1 was 32 mm, and the total surface density was 3.05 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound absorption test with a rating of ◯ or ⊚ in all frequency ranges, and passed the sound insulation test with a rating of ◯ or ⊚ in all frequency ranges.

[0024] Example 3 The first layer 10 constituting the first mass portion (first layer and second layer) 2 has a thickness of 28 mm and an areal density of 0.64 kg / m 2 The second layer 20 is made of flexible polyurethane foam A having a thickness of 0.2 mm and an areal density of 0.24 kg / m 2 The vinyl chloride resin film A had a thickness of 28.2 mm and an areal density of 0.88 kg / m 2 Other than that, it was the same as Example 1. The total thickness T of the sound absorbing and insulating partition material 1 was 39.2 mm, and the total surface density was 2.28 kg / m2 is. This sound absorbing and insulating partition material 1 had sound absorption properties that were acceptable, with a rating of ⊚, in all frequency ranges, and sound insulation properties that were acceptable, with a rating of ◯ or ⊚, in all frequency ranges.

[0025] Example 4 The first layer 10 constituting the first mass part (first and second layers) 2 was made of the same flexible polyurethane foam A as in Example 2, and the second layer 20 was made of the same vinyl chloride resin film A as in Example 1. The thickness of the first mass part was 15.2 mm, and the surface density was 0.59 kg / m 2 This becomes: The third layer 30 constituting the spring portion 3 is made of a material having a thickness of 23 mm and an areal density of 0.46 kg / m 2 The result was named flexible polyurethane foam B. The fourth layer 40 constituting the second mass portion 4 was the same as in Example 1. The total thickness T of the sound absorbing and insulating partition material 1 was 39.2 mm, and the total surface density was 2.25 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound absorption test with a rating of ◯ or ⊚ in all frequency ranges, and passed the sound insulation test with a rating of ◯ or ⊚ in all frequency ranges.

[0026] <Example 5> The third layer 30 constituting the spring portion 3 is formed to a thickness of 10 mm and a surface density of 0.20 kg / m 2 The procedure was the same as in Example 4 except that flexible polyurethane foam B was used. The total thickness T of the sound-absorbing and insulating partition material 1 is 26.2 mm, and the overall surface density is 1.99 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound absorption test with a rating of ◯ or ⊚ in all frequency ranges, and passed the sound insulation test with a rating of ◯ or ⊚ in all frequency ranges.

[0027] [Comparative Example 1-9] <Comparative Example 1> The flexible polyurethane foam A of the first layer 10 constituting the first mass portion (first layer and second layer) 2 is omitted, and the third layer 30 constituting the spring portion 3 is made of a polyurethane foam having a thickness of 30 mm and an areal density of 0.60 kg / m 2 The procedure was the same as in Example 1, except that the flexible polyurethane foam B was used. The total thickness T of the sound-absorbing and sound-insulating partition material 1 is 31.2 mm, and the overall surface density is 2.04 kg / m 2 is. This sound-absorbing and sound-insulating partition material 1 passed the sound insulation test with a rating of ○ or ◎ in all frequency ranges, but failed the sound absorption test with a rating of × in all frequency ranges other than 500 Hz, meaning that sound absorption could not be ensured.

[0028] <Comparative Example 2> The flexible polyurethane foam A of the first layer 10 constituting the first mass part (first layer and second layer) 2 is omitted, and the second layer 20 is made of a polyurethane foam having a thickness of 1 mm and an areal density of 1.20 kg / m 2 The same as Comparative Example 1 was used except that the vinyl chloride resin film B was used. The total thickness T of the sound absorbing and insulating partition material 1 was 32 mm, and the total surface density was 3.00 kg / m 2 is. With this sound-absorbing and sound-proofing partition material 1, the sound insulation performance was passed with a rating of ○ or ◎ in all frequency ranges, but the sound absorption performance was failed with a rating of × in all frequency ranges, and sound absorption could not be ensured.

[0029] <Comparative Example 3-9> Regarding the following Comparative Examples 3-9, the main changes will be explained, and the specific configurations of the layers 10 to 40 are as shown in Table 2, and therefore explanations thereof will be omitted. <Comparative Example 3> The flexible polyurethane foam A of the first layer 10 constituting the first mass part (first layer and second layer) 2 of Example 1 was left as it was, and the thickness of the second layer 20 was set to 1.2 mm and the areal density was set to 1.44 kg / m 2 By using the vinyl chloride resin film A, the thickness of the first mass portion is 21.2 mm, and the surface density is 1.90 kg / m 2 and enlarged it. This sound absorbing and insulating partition material 1 passed the sound insulation test with a rating of ○ or ⊚ in all frequency ranges, but failed the sound absorption test with a rating of ×, meaning that sound absorption could not be ensured.

[0030] <Comparative Example 4> The flexible polyurethane foam A of the first layer 10 constituting the first mass part (first layer and second layer) 2 of Example 1 was left as it was, and the thickness of the second layer 20 was set to 0.05 mm and the areal density was set to 0.06 kg / m 2 By using the vinyl chloride resin film A, the thickness of the first mass portion is set to 20.05 mm, and the surface density is set to 0.46 g / m 2 and made it smaller. This sound absorbing and insulating partition material 1 passed the sound insulating test with a rating of ○ in all frequency ranges, but failed the sound absorbing test with a rating of ×, meaning that sound absorbing properties could not be ensured.

[0031] <Comparative Example 5> The thickness of the first layer 10 constituting the first mass portion (first layer and second layer) 2 is 10 mm, and the surface density is 0.23 kg / m 2 The second layer 20 is made of flexible polyurethane foam A having a thickness of 0.2 mm and an areal density of 0.24 kg / m 2 The thickness of the first mass portion was 10.2 mm, and the surface density was 0.47 kg / m 2 and made it smaller. This sound absorbing and insulating partition material 1 passed the sound insulation test with a rating of ○ or ⊚ in all frequency ranges, but failed the sound absorption test with a rating of ×, meaning that sound absorption could not be ensured.

[0032] <Comparative Example 6> The air permeability of the first layer 10 constituting the first mass portion (first layer and second layer) 2 is set to 100 ml / cm 2 / s, the thickness is 20 mm, and the surface density is 0.40 kg / m 2 The thickness of the first mass portion was 20.2 mm, and the surface density was 0.64 kg / m. 2 This becomes: This sound absorbing and insulating partition material 1 passed the sound insulation test with a rating of ○ or ⊚ in all frequency ranges, but failed the sound absorption test with a rating of ×, meaning that sound absorption could not be ensured.

[0033] <Comparative Example 7> The thickness of the fourth layer 40 constituting the second mass portion 4 is 0.52 mm, and the surface density is 0.62 kg / m 2 The film was made smaller and named vinyl chloride resin film B. The total thickness T of the sound-absorbing and sound-insulating partition material 1 is 30.72 mm, and the total surface density is 1.52 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound absorption test with a rating of ⊚ in all frequency ranges, but failed the sound insulation test with a rating of x, meaning that sound insulation could not be ensured.

[0034] <Comparative Example 8> The thickness of the third layer 30 constituting the spring portion 3 is set to be as thin as 5 mm, and the surface density is set to be 0.10 kg / m 2 The result was named flexible polyurethane foam B. The total thickness T of the sound-absorbing and insulating partition material 1 is 31.2 mm, and the total surface density is 2.12 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound insulating test with a rating of ○ in all frequency ranges, but failed the sound absorbing test with a rating of ×, meaning that sound absorbing properties could not be ensured.

[0035] <Comparative Example 9> The third layer 30 constituting the spring portion 3 has a 25% compression hardness of 300 N and an areal density of 0.65 kg / m 2 The result was named flexible polyurethane foam C. The total thickness T of the sound-absorbing and insulating partition material 1 is 31.2 mm, and the total surface density is 2.55 kg / m 2 is. This sound absorbing and insulating partition material 1 passed the sound insulation test with a rating of ○ or ⊚ in all frequency ranges, but failed the sound absorption test with a rating of ×, meaning that sound absorption could not be ensured.

[0036] <Reference example 1> Thickness 30mm, surface density 0.46kg / m 3 The sound absorbing and insulating partition material 1 was made of only the soft polyurethane foam A. This sound absorbing and insulating partition material 1 failed in sound insulation performance in all frequency ranges with a grade of x, and failed in sound absorption performance with a grade of x, meaning that it was unable to ensure both sound insulation and sound absorption.

[0037] From Tables 1 and 2, which show the evaluation results of the sound-absorbing and sound-insulating partition material 1 performed for the above examples and comparative examples, it was confirmed that in Examples 1 to 5 of the present invention, even if the total thickness T of the sound-absorbing and sound-insulating partition material 1 is 40 mm or less, it is possible to obtain a thin sound-absorbing and sound-insulating partition material 1 with a sound absorption coefficient of 0.5 or more in the frequency range of 500 to 4000 Hz and a transmission loss of 10 dB or more, which has excellent sound absorption and sound insulation properties. On the other hand, it was confirmed that in Comparative Examples 1 to 9, the sound absorbing and insulating partition material 1 could not be provided with both sound absorbing and sound insulating properties.

[0038] [Table 1]

[0039] [Table 2]

[0040] The sound-absorbing and sound-proofing partition material 1 specifically described in the above embodiment has a four-layer structure consisting of a first layer 10 made of soft polyurethane foam on the sound source side, a second layer 20 made of non-breathable vinyl chloride resin film laminated on the first layer 10, a third layer 30 made of soft polyurethane foam laminated on the second layer 20, and a fourth layer 40 made of non-breathable vinyl chloride resin film laminated on the third layer 30, and is configured with a total thickness T of 40 mm or less.

[0041] This sound-absorbing and insulating partition material 1 can have a total thickness T of 40 mm or less, and can have a sound absorption coefficient of 0.5 or more in the frequency range of 500 to 4000 Hz, and sound insulation with a transmission loss of 10 dB or more. The sound-absorbing and insulating partition material 1 blocks line of sight while also providing sound insulation and sound absorption properties, and can be used for a wide range of purposes, such as protecting privacy in evacuation shelters during disasters, and dividing indoor spaces for teleworking and free address systems.

[0042] The sound absorbing and insulating partition material 1 has a first layer 10 having a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm. 2 The first layer 10 and the second layer 20 are made of a flexible polyurethane foam having a density of 0.2 to 1.0 mm, and the second layer 20 is made of a vinyl chloride resin thin film having a thickness of 0.2 to 1.0 mm. The first layer 10 and the second layer 20 constitute a first mass portion 2, and the overall surface density of the first mass portion 2 is 0.50 to 1.80 kg / m. 2 The third layer 30 is made of a soft polyurethane foam having a thickness of 10 mm or more and a 25% compression hardness of 200 N or less, and constitutes the spring portion 3, and the fourth layer 40 is made of a soft polyurethane foam having a thickness of 0.7 mm or more and a surface density of 0.80 kg / m 2 The vinyl chloride resin film described above constitutes the second mass portion 4. In addition to this, the sound absorbing and insulating partition material 1 has a total thickness T of 40 mm or less.

[0043] This sound-absorbing and insulating partition material 1 combines high-frequency sound-absorbing properties due to the soft polyurethane foam with a specific air permeability in the first layer 10, and low-frequency sound-absorbing properties due to the spring mass structure with the spring portion 3 between the first mass portion 2 and the second mass portion 4, resulting in excellent sound absorption from the low frequency range of 500 Hz to the high frequency range of 4000 Hz, with a sound absorption coefficient of 0.5 or more. At the same time, the sound-absorbing and insulating partition material 1 also has excellent sound insulation properties, with a transmission loss of 10 dB or more in the same frequency range. Therefore, the sound-absorbing and sound-proofing partition material 1 can have a total thickness T of 40 mm or less, and can have sound absorption properties such that the sound absorption coefficient is 0.5 or more in all frequency ranges of 500, 1000, 2000, and 4000 Hz, and can also have sound insulation properties such that the transmission loss is 10 dB or more in the same frequency ranges.

[0044] As specifically explained above in conjunction with the embodiment, the sound absorbing and insulating partition material 1 of the present invention has a four-layer structure consisting of a first layer 10 made of a porous body on the sound source side, a second layer 20 made of an air-impermeable resin film laminated on the first layer 10, a third layer 30 made of an elastic body laminated on the second layer 20, and a fourth layer 40 made of an air-impermeable resin film laminated on the third layer 30, and the first layer 10 has a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm. 2 / s, the thickness of the second layer 20 is 0.2 to 1.0 mm, and the surface density of the first layer 10 and the second layer 20 combined is 0.50 to 1.80 kg / m 2 The third layer 30 has a thickness of 10 mm or more and a 25% compression hardness of 200 N or less, and the fourth layer 40 has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m 2 or more, and the total thickness T is 40 mm or less.

[0045] According to this configuration, the sound-absorbing and insulating partition material 1 has a four-layer structure consisting of the first layer 10 to the fourth layer 40, and by setting the total thickness T to 40 mm or less, it is possible to provide sound insulation with a sound absorption coefficient of 0.5 or more in the frequency range of 500 to 4000 Hz and a transmission loss of 10 dB or more, even with a total thickness T of 40 mm or less. The sound-absorbing and insulating partition material 1 not only blocks line of sight but also has sound-insulating and sound-absorbing properties, and can be used for a wide range of purposes, such as protecting privacy in evacuation shelters during disasters and dividing up indoor spaces for teleworking and free address systems.

[0046] The sound absorbing and insulating partition material 1 has a first layer 10 having a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm. 2The sound absorbing and insulating partition material 1 has high-frequency sound absorption properties of 0.5 / s, and low-frequency sound absorption properties due to a spring mass structure in which the second layer 20 is a resin film with a thickness of 0.2 to 1.0 mm, the first layer 10 and the second layer 20 form the first mass portion 2, and a spring portion 3 with a thickness of 10 mm or more and a 25% compression hardness of 200 N or less is provided between the first mass portion 2 and the second mass portion 4. This provides excellent sound absorption from the low frequency range of 500 Hz to the high frequency range of 4000 Hz, with a sound absorption coefficient of 0.5 or more. At the same time, the sound absorbing and insulating partition material 1 has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m 2 By providing the fourth layer 40 having the above properties, the sound insulation is also excellent, and the transmission loss in the same frequency range is 10 dB or more. Therefore, the sound-absorbing and sound-proofing partition material 1 can have a total thickness T of 40 mm or less, and can have sound absorption properties such that the sound absorption coefficient is 0.5 or more in all frequency ranges of 500, 1000, 2000, and 4000 Hz, and can also have sound insulation properties such that the transmission loss is 10 dB or more in the same frequency ranges.

[0047] It should be noted that the present invention is not limited to the above-described embodiment. [Explanation of symbols]

[0048] 1. Sound-absorbing and sound-proofing partition material 2. First mass part 3 Spring part 4 Second mass part 10 First layer (flexible polyurethane foam with specific breathability) 20 2nd layer (vinyl chloride resin film) 30 3rd layer (soft polyurethane foam) 40 4th layer (vinyl chloride resin film) T total thickness

Claims

[Claim 1] A first layer made of a porous material on the sound source side; a second layer made of an air-impermeable resin film laminated on the first layer; a third layer made of an elastic material laminated on the second layer; a fourth layer made of a non-breathable resin film laminated on the third layer; The first layer has a thickness of 15 mm or more and an air permeability of 1 to 70 ml / cm ２ / s, The second layer has a thickness of 0.2 to 1.0 mm, The combined areal density of the first layer and the second layer is 0.59 to 1.80 kg / m ２ It is said that, The third layer is a polyurethane foam having a thickness of 10 mm or more and a 25% compression hardness of 200 N or less, The fourth layer has a thickness of 0.7 mm or more and an areal density of 0.80 kg / m ２ That is all, The total thickness is 40 mm or less, The sound absorption coefficient based on JIS A 1405 is 0.5 or more in the frequency range of 500 Hz. A sound-absorbing and sound-proof partition material.

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