Vibration damping material

Abstract

To provide a vibration damping material in which the mixing ratio of waste material and resin is appropriately adjusted. [Solution] This disclosure provides a vibration damping material comprising at least a non-metallic waste material and a resin, wherein the blending ratio of the resin to the non-metallic waste material is 0.5 or more and 12 or less.

Description

Technical Field

[0001] The present disclosure relates to a vibration damping material.

Background Art

[0002] Conventionally, vibration damping materials may be used. As such a vibration damping material, there is one in which industrial waste materials are impregnated with a resin (see Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0004]

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Although there is a vibration damping material in which industrial waste materials are impregnated with a resin, the inventors of the present application newly found that it is necessary to appropriately adjust the blending ratio of the waste materials and the resin so that the vibration damping material can function suitably.

[0006] Therefore, an object of the present disclosure is to provide a vibration damping material in which the blending ratio of waste materials and resin is appropriately adjusted.

Means for Solving the Problems

[0007] In order to achieve the above object, in the present disclosure, it contains at least non-metallic waste materials and a resin, and there is provided a vibration damping material in which the blending ratio of the resin with respect to the non-metallic waste materials is 0.5 or more and 12 or less.

Effects of the Invention

[0008] According to this disclosure, it is possible to provide a vibration damping material in which the mixing ratio of waste material and resin is appropriately adjusted. [Modes for carrying out the invention]

[0009] The vibration damping material described herein will be explained below.

[0010] The vibration damping material of this disclosure comprises at least non-metallic waste material and a resin. The non-metallic waste material is contained within the resin. The non-metallic waste material has at least one component selected from the group consisting of thermoplastic resin film material, thermoplastic resin sheet material, thermosetting resin film material, thermosetting resin sheet material, and foamed plastic foam. Furthermore, the non-metallic waste material may further comprise organic or inorganic fibrous material. For example, the non-metallic waste material may be scraps of automotive interior materials or crushed home appliances from which metal components have been removed.

[0011] The above films and sheets may be composed of at least one resin material selected from the group consisting of polyester, polypropylene, polyethylene, acrylic, epoxy, urea, phenol, and polyimide. The above foamed plastic foam may be composed of at least one foam material selected from the group consisting of foamed urethane, expanded polystyrene, and expanded polyethylene.

[0012] The above organic fiber material may consist of at least one fiber material selected from the group consisting of nonwoven fabrics, synthetic fibers, and natural fibers. Examples of nonwoven fabrics include PET-based and polypropylene-based materials. Examples of synthetic fibers include nylon-based, vinylon-based, rayon-based, and acrylic-based materials. Examples of natural fibers include wool, cotton, hemp, and silk. The above inorganic fiber material may consist of at least one fiber material selected from the group consisting of glass fiber, rock wool, carbon fiber, and ceramic fiber.

[0013] Furthermore, the above-mentioned resin may be, for example, at least one selected from the group consisting of aqueous resins and solvent-based (thermoplastic) resins.

[0014] Examples of aqueous resins include at least one emulsion selected from the group consisting of acrylic, vinyl acetate, vinyl acetate ethylene (VAE), styrene-butadiene rubber (SBR), polyurethane, polyester, and vinyl chloride. Examples of aqueous resins include at least one resin material selected from the group consisting of polyvinyl alcohol (PVA), hydroxyethylcellulose (HEC), polyethylene glycol (PEG), and polyvinylpyrrolidone (PVP).

[0015] Examples of thermoplastic resins include at least one resin material selected from the group consisting of polyethylene (PE), polypropylene (PP), ethylene vinyl acetate (EVA), polyamide, polyester, etc., or at least one thermoplastic elastomer selected from the group consisting of styrene, acrylic, urethane, etc.

[0016] Here, the inventors of the present invention have, after diligent study, newly discovered that the mixing ratio of the above-mentioned non-metallic waste material and the above-mentioned resin contained in the vibration damping material is important for vibration damping performance. Specifically, in the vibration damping material of the present disclosure, the mixing ratio of the resin to the above-mentioned non-metallic waste material is 0.5 to 12.

[0017] When the mixing ratio falls within this range, the loss coefficient, which is the guideline value for vibration damping material functionality, becomes 0.05 or higher, and as a result, vibration damping performance can be suitably ensured. However, if the above mixing ratio is 16 or higher, it falls below the guideline value of 0.05 for vibration damping material functionality, making it difficult to ensure vibration damping performance. Also, if the above mixing ratio falls below 0.5, it falls below the guideline value of 0.05 for vibration damping material functionality, making it difficult to ensure vibration damping performance.

[0018] Preferably, in the present disclosure, the blending ratio of the resin to the non-metallic waste material is greater than 1.0. That is, the above resin can be "rich" in blending compared to the non-metallic waste material. In this case, the loss factor becomes 0.1 or more, and as a result, the vibration damping performance can be more suitably ensured.

[0019] More preferably, in the present disclosure, the blending ratio of the resin to the non-metallic waste material is 2.0. In this case, within the range of the upper blending ratio, the loss factor becomes approximately 0.14, which is the highest, and as a result, even more suitable vibration damping performance can be ensured.

Example

[0020] Hereinafter, examples of the present disclosure will be described. Example 1 First, 250 g of a non-metallic waste material manufactured by HOWA Co., Ltd. was weighed into a desiccator cup (1 liter). As such a waste material, those containing urethane foam, glass fiber, and PET non-woven fabric were used. Then, 125 g of a modified acrylic emulsion S-3098 (non-volatile content 50%) manufactured by High Pressure Gas Industry Co., Ltd. was added as a resin material and mixed with a planetary mixer PLM-5 manufactured by Inoue Manufacturing Co., Ltd. After confirming that the waste material was sufficiently impregnated with the resin, the mixture of the waste material and the resin was taken out into a hollow vat. Then, it was dried in a 60°C constant temperature bath for 12 hours or more. After drying, it was molded into a flat sheet using an 180°C press machine. The surface weight of the flat sheet calculated from the weight after drying was 2 kg / m 2 It was.

[0021] Thereafter, the molded flat sheet was used with a loss factor measuring instrument (manufactured by Spectris Co., Ltd., loss factor measuring device), and the loss factor at a frequency of 200 Hz at 20°C was measured by the cantilever method. The measurement results of the loss factor are shown in Table 1.

[0022] Example 2 This method differs from Example 1 in that 250g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0023] Example 3 This method differs from Example 1 in that 375g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0024] Example 4 This method differs from Example 1 in that 500g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0025] Example 5 This method differs from Example 1 in that 1000g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and a frequency of 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0026] Example 6 This method differs from Example 1 in that 2000g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and a frequency of 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0027] Example 7 This example differs from Example 1 in that 3000g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0028] Comparative Example 1 This method differs from Example 1 in that 62.5g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and a frequency of 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0029] Comparative Example 2 This method differs from Example 1 in that 4000g of modified acrylic emulsion S-3098 was added as the resin material. The remaining steps were the same. The resulting flat sheet was measured for loss coefficient at 20°C and a frequency of 200Hz using a loss coefficient measuring instrument. The measurement results for the loss coefficient are shown in Table 1.

[0030] Comparative Example 3 This method differs from Example 1 in that 3000g of modified acrylic emulsion S-3098 was added as the resin material without weighing the waste material into a disposable cup. The remaining steps were the same. The loss coefficient of the obtained resin sheet was measured at 20°C and a frequency of 200Hz using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 1.

[0031] [Table 1] Measurement results of loss coefficient at 20°C and frequency of 200Hz TIFF2026047267000001.tif43170

[0032] [Rating 1] From the results of Examples 1-7 and Comparative Examples 1 and 2 in Table 1 above, it was found that when the mixing ratio of the resin to the waste material is 0.5:1 to 12:1, that is, when the mixing ratio of the resin to the non-metallic waste material is between 0.5 and 12, the loss coefficient, which is the guideline value for functioning as a vibration damping material, becomes 0.05 or higher. This shows that vibration damping performance can be suitably ensured.

[0033] Furthermore, based on Example 1 and Comparative Example 3, it was found that including non-metallic waste materials in addition to resin can increase the loss coefficient, i.e., improve vibration damping performance.

[0034] The following describes Embodiment 8 of this disclosure.

[0035] Example 8 This method differs from Example 1 in that it uses a mixture of two types of waste materials. Waste material 1 is crushed nonwoven fabric manufactured by Toa Spinning Materials Co., Ltd. (indicated as TB in Table 2). Waste material 2 is crushed polyurethane foam obtained from Consulting Office EIJI (indicated as EIJI urethane in Table 2).

[0036] On the other hand, as in Example 1, modified acrylic emulsion S-3098 manufactured by High Pressure Gas Industry Co., Ltd. was used as the resin material. The remaining steps were the same as in Example 1. As shown in Table 2, the sum of each component in the obtained flat sheet was set to 100 in terms of weight. The surface weight of the flat sheet calculated from the weight after drying was 2 kg / m 2 Subsequently, the loss coefficient of the obtained flat sheet was measured at a frequency of 200 Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0037] Example 9 This method differs from Example 8 in that it uses one type of waste material, specifically waste material 1 (nonwoven fabric crushed material manufactured by Toa Spinning Materials Co., Ltd. (shown as TB in Table 2)). The remaining steps are the same as in Example 8. The loss coefficient of the obtained flat sheet was measured at a frequency of 200 Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0038] Example 10 This method differs from Example 8 in that it uses one type of waste material, specifically waste material 2 (pulverized polyurethane foam obtained from Consulting Office EIJI (referred to as EIJI urethane in Table 2)). The remaining steps are the same as in Example 8. The loss coefficient of the obtained flat sheet was measured at a frequency of 200 Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0039] Comparative Example 4 This method differs from Example 8 in that it uses two types of waste materials (waste material 1 and waste material 2 mentioned above) instead of resin. The remaining steps are the same as in Example 8. The loss coefficient of the obtained sheet was measured at 20°C and a frequency of 200 Hz using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0040] Comparative Example 5 This method differs from Example 8 in that it uses one type of waste material (waste material 1 mentioned above) instead of resin. The remaining steps are the same as in Example 8. The loss coefficient of the obtained sheet was measured at 20°C and a frequency of 200 Hz using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0041] Comparative Example 6 This method differs from Example 8 in that it uses one type of waste material (waste material 2 mentioned above) instead of resin. The remaining steps are the same as in Example 8. The loss coefficient of the obtained sheet was measured at 20°C and a frequency of 200 Hz using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 2.

[0042] [Table 2] Measurement results of loss coefficient at 20°C and frequency of 200Hz TIFF2026047267000002.tif40170

[0043] [Rating 2] Comparing Example 8 with Examples 9 and 10, it was found that when the resulting vibration damping material is a combination of two types of waste materials—nonwoven fabric crushed material (organic fiber material) and polyurethane foam crushed material (foamed plastic foam)—the loss coefficient, i.e., the vibration damping performance, improves. Furthermore, comparative examples 4 to 6 showed that when the resulting vibration damping material does not contain resin and is composed of waste materials, the loss coefficient falls below 0.05, indicating that vibration damping performance cannot be ensured.

[0044] Example 11 Similar to Example 4, a water-based resin 1 (modified acrylic emulsion S-3098) was used as the resin material, and a flat sheet was formed with a resin-to-waste material mixing ratio of 2:1. Compared to Example 4, the surface weight of the flat sheet calculated from the weight after drying was 3 kg / m². 2 Subsequently, the loss coefficient of the obtained flat sheet was measured at a frequency of 200 Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 3.

[0045] Example 12 In comparison to Example 11, aqueous resin 2 (vinyl acetate ethylene (VAE)) was used as the resin material, and a flat sheet was formed with a resin-to-waste material mixing ratio of 2:1. Subsequently, the loss coefficient of the obtained flat sheet was measured at a frequency of 200 Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 3.

[0046] Example 13 In comparison to Example 11, a solution was prepared by dissolving 500g of thermoplastic resin 3 (styrene-based thermoplastic resin (TPE) / Hybler 5127, manufactured by Kuraray Co., Ltd.) in 1000g of xylene as the resin material. A flat sheet was formed with a resin-to-waste material mixing ratio of 2:1. Subsequently, the loss coefficient of the obtained flat sheet was measured at a frequency of 200Hz at 20°C using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 3.

[0047] [Table 3] Measurement results of loss coefficient at 20°C and frequency of 200Hz TIFF2026047267000003.tif39153

[0048] [Rating 3] Examples 11 to 13 show that even when using thermoplastic resins as the resin, not just aqueous resins, if the mixing ratio of resin to waste material is at a predetermined ratio, the loss coefficient will be 0.1 or higher, and suitable vibration damping performance can be ensured.

[0049] Example 14 This method differs from Example 1 in that the type of waste material and / or resin was changed. The remaining steps were the same as in Example 1. Instead of the non-metallic waste material manufactured by HOWA Corporation, the following waste materials 2-5 were used. • Waste material 2 (crushed car carpet): Crushed nonwoven fabric manufactured by Yamato Co., Ltd. • Waste material 3 (crushed PE / PP automotive ceiling material): Crushed resin manufactured by Howa Kogyo Co., Ltd. • Waste material 4 (SF-5RN crushed material): Nonwoven fabric crushed material manufactured by High Pressure Gas Industry Co., Ltd. • Waste material 5 (GW-4R Funen crushed material): Glass wool crushed material manufactured by High Pressure Gas Industry Co., Ltd.

[0050] The following resins were used: • Resin A (S-3098): Modified acrylic resin manufactured by High Pressure Gas Industry Co., Ltd. (same as Example 1) • Resin B (Soundproof 1400): Water-based acrylic vibration damping paint manufactured by High Pressure Gas Industry Co., Ltd. • Resin C (Nalstar SR-107): SBR manufactured by A&L Japan Co., Ltd.

[0051] As shown in Table 4, the total weight of each component in the obtained flat sheet was set to 100. Subsequently, the loss coefficient of the obtained flat sheet was measured at 20°C and a frequency of 200 Hz using a loss coefficient measuring instrument. The measurement results of the loss coefficient are shown in Table 4.

[0052] [Table 4] Measurement results of loss coefficient at 20°C and frequency of 200Hz TIFF2026047267000004.tif55170

[0053] [Rating 4] Examples 14 to 19 show that even when using waste materials 2 to 5 as the waste material instead of the non-metallic waste material manufactured by HOWA Corporation (also referred to as waste material 1), the loss coefficient is 0.1 or higher, and suitable vibration damping performance can be ensured, provided that the mixing ratio of the non-metallic resin to the waste material is the predetermined ratio.

[0054] From the above, it was found that by blending various waste materials and resins within a predetermined range, without being limited to the use of specific waste materials, a predetermined loss coefficient (0.1 or higher) that allows for suitable vibration damping performance can be satisfied.

[0055] In particular, in Examples 14 to 19, even when using the above-mentioned waste materials 2 to 5, the loss coefficient was higher than 0.13, which was higher than in Examples 1 to 7 when using only one type of waste material 1. In particular, in Example 15 (a combination example of resin A and waste material 3) and Example 19 (a combination example of resin B and waste material 3), the loss coefficient was 0.168, indicating that vibration damping performance can be more favorably secured.

[0056] Furthermore, from Example 14 (combination example of resin A and waste material 2) and Example 18 (combination example of resin C and waste material 2), it was found that even when a different waste material (waste material 2) from waste material 1 is used in common, the loss coefficient remains 0.1 or higher even when the type of resin (acrylic ⇒ SBR) is changed, and suitable vibration damping performance can be ensured. Similarly, from Example 15 (combination example of resin A and waste material 3) and Example 19 (combination example of resin B and waste material 3), it was found that when a different waste material (waste material 3) from waste material 1 is used in common, the loss coefficient remains 0.1 or higher even when the type of resin (modified acrylic ⇒ water-based acrylic), and suitable vibration damping performance can be ensured.

[0057] The above has described the vibration damping material of this disclosure, but this is merely an example of a typical case. Therefore, those skilled in the art will easily understand that this disclosure is not limited thereto and that various embodiments are possible.

[0058] Furthermore, the vibration damping material described herein may include the following embodiments. <1> It includes at least non-metallic waste materials and resin, A vibration damping material in which the blending ratio of the resin to the non-metallic waste material is 0.5 or more and 12 or less. <2> The mixing ratio of the resin to the non-metallic waste material is greater than 1.0. <1> The vibration damping material described above. <3> The mixing ratio of the resin to the non-metallic waste material is 2.0. <1> or <2> The vibration damping material described above. <4> The resin is richer in composition than the non-metallic waste material. <2> or <3> The vibration damping material described above. <5> The aforementioned resin is an aqueous resin. <1> ~ <4> A vibration damping material as described in any of the following. <6> The aforementioned resin is a thermoplastic resin. <1> ~ <4> A vibration damping material as described in any of the following. <7> The non-metallic waste material comprises at least one component selected from the group consisting of thermoplastic resin film material, thermoplastic resin sheet material, thermosetting resin film material, thermosetting resin sheet material, and foamed plastic foam. <1> ~ <6> A vibration damping material as described in any of the following. <8> The aforementioned non-metallic waste material further comprises organic or inorganic fibrous material. <7> The vibration damping material described above. <9> The organic fiber material is composed of at least one fiber material selected from the group consisting of nonwoven fabrics, synthetic fibers, and natural fibers, and the inorganic fiber material is composed of at least one fiber material selected from the group consisting of glass fiber, rock wool, carbon fiber, and ceramic fiber. <8> The vibration damping material described above. [Industrial applicability]

[0059] The vibration damping material of this disclosure can be attached to products that generate vibrations, such as industrial equipment, automobiles, interior materials, and building materials, to provide vibration damping properties.

Claims

1. It includes at least non-metallic waste materials and resin, A vibration damping material in which the blending ratio of the resin to the non-metallic waste material is 0.5 or more and 12 or less.

2. The vibration damping material according to claim 1, wherein the blending ratio of the resin to the non-metallic waste material is greater than 1.

0.

3. The vibration damping material according to claim 1, wherein the blending ratio of the resin to the non-metallic waste material is 2.

0.

4. The vibration damping material according to claim 2 or 3, wherein the resin is more richly formulated than the non-metallic waste material.

5. The vibration damping material according to claim 1, wherein the resin is an aqueous resin.

6. The vibration damping material according to claim 1, wherein the resin is a thermoplastic resin.

7. The vibration damping material according to claim 1, wherein the non-metallic waste material comprises at least one member selected from the group consisting of thermoplastic resin film material, thermoplastic resin sheet material, thermosetting resin film material, thermosetting resin sheet material, and foamed plastic foam.

8. The vibration damping material according to claim 7, wherein the non-metallic waste material further comprises an organic or inorganic fiber material.

9. The vibration damping material according to claim 8, wherein the organic fiber material is composed of at least one fiber material selected from the group consisting of nonwoven fabrics, synthetic fibers, and natural fibers, and the inorganic fiber material is composed of at least one fiber material selected from the group consisting of glass fiber, rock wool, carbon fiber, and ceramic fiber.

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