Polyurethane foam molding, sound-absorbing material, and vibration-damping material

Abstract

To provide a polyurethane foam molded body in which a polyurethane foam crushed product is used and desired physical properties are ensured.SOLUTION: Provided is a polyurethane foam molded body (10) that is obtained by foaming a mixed composition of a polyol, a polyisocyanate, and a polyurethane foam crushed product (11).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a polyurethane foam molded article and a method for producing a polyurethane foam molded article. [Background technology]

[0002] Patent Documents 1 and 2 disclose a molded article obtained by heating and pressing pulverized polyurethane foam together with a binder. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-001060 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-326329 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional articles using pulverized polyurethane foams do not necessarily have sufficient desired physical properties.

[0005] The present disclosure aims to ensure desired physical properties for an article using pulverized polyurethane foam. The present disclosure can be realized in the following aspects. [Means for solving the problem]

[0006] A polyurethane foam molded article obtained by foaming a mixed composition of a polyol, a polyisocyanate, and pulverized polyurethane foam. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to ensure desired physical properties for articles using pulverized polyurethane foam. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a cross-sectional view schematically showing a polyurethane foam molded article according to an embodiment. [Figure 2] 1 is a graph showing the relationship between frequency and loss factor in Examples 1-3. DETAILED DESCRIPTION OF THE INVENTION

[0009] Here, a preferred example of the present disclosure will be described. -Polyurethane foam moldings containing more than 0% by mass and up to 15% by mass of ground polyurethane foam. -Polyurethane foam moldings with an average sound absorption coefficient of 0.50 or more in the range of 1.0kHz to 6.3kHz when measured using the reverberation chamber sound absorption coefficient measurement method based on JIS A 1409:1998. -Polyurethane foam molding with a loss factor of 0.20 or more at the anti-resonance point around 450 Hz, measured in accordance with JIS K 7391:2008. A method for producing a polyurethane foam molded product, comprising foaming a mixed composition of a polyol, a polyisocyanate, and pulverized polyurethane foam to obtain a polyurethane foam molded product.

[0010] The present disclosure will be described in detail below. In this specification, when a numerical range is indicated using "-", it is intended to include both the lower limit and the upper limit unless otherwise specified. For example, the expression "10-20" includes both the lower limit "10" and the upper limit "20". In other words, "10-20" has the same meaning as "10 or more and 20 or less".

[0011] 1. Polyurethane foam molding 10 The polyurethane foam molded article 10 of the first embodiment is obtained by foaming a mixed composition of polyol, polyisocyanate, and pulverized polyurethane foam 11. The polyurethane foam molded article 10 of the second embodiment contains pulverized polyurethane foam 11 in an amount of more than 0 mass % and not more than 15 mass %.

[0012] (1) Polyurethane foam pulverized material 11 The pulverized polyurethane foam 11 may be any of flexible, semi-rigid, and rigid polyurethane foams. Among these, semi-rigid or rigid polyurethane foams are preferred from the viewpoint of ease of subdivision. The polyurethane foam may be either an open-cell foam or a closed-cell foam. While open-cell foams are generally used as sound-absorbing materials, the polyurethane foam molding 10 can exhibit desired performance, such as sound absorption, even if it is a closed-cell foam, by using pulverized polyurethane foam 11. Multiple types of polyurethane foam may be used in combination. The density of the polyurethane foam material is not particularly limited. The density of polyurethane foam measured in accordance with JIS K 7222 is, for example, 10 kg / m 3 -200kg / m 3 may be.

[0013] The polyurethane foam pulverized material 11 can be obtained by breaking down the polyurethane foam material. Specifically, from the viewpoint of recyclability, the polyurethane foam material may be scrap material discharged during the polyurethane foam manufacturing process or used polyurethane foam that is scheduled to be discarded. Alternatively, the polyurethane foam pulverized material 11 may be waste or scrap of polyurethane foam discharged during the polyurethane foam manufacturing process.

[0014] The size of the pulverized material 11 is not particularly limited. The size of the pulverized material 11 can be, for example, 50 mm or less, and from the viewpoint of moldability, may be 10 mm or less, 5 mm or less, 2 mm or less, or 1 mm or less. The size of the pulverized material 11 can be determined, for example, by capturing an enlarged image of the pulverized material 11 using a microscope and measuring the maximum diameter of its outer shape. The size of the pulverized material 11 can also be defined as the fraction that passes through a sieve having an opening diameter of a predetermined dimension. Examples of the predetermined dimension include 10 mm, 5 mm, 2 mm, 1 mm, and 0.5 mm. The size of the pulverized material 11 may be, for example, 0.1 mm or more, 0.5 mm or more, 1 mm or more, 3 mm or more, or 5 mm or more. The size of the pulverized material 11 can be set within a range that appropriately combines the above-mentioned lower and upper limits, taking productivity into consideration. The size of the pulverized material 11 can be set within a desired range by changing the processing conditions for obtaining the pulverized material 11 or by appropriately classifying the obtained pulverized material 11.

[0015] The content of pulverized polyurethane foam 11 is preferably greater than 0% by mass, more preferably greater than 1% by mass, and even more preferably greater than 2% by mass, when polyurethane foam molded body 10 is taken as 100% by mass. A content equal to or greater than the above range can improve sound absorption. Furthermore, when recycled materials are used for pulverized polyurethane foam 11, a content equal to or greater than the above range can improve recyclability. From the viewpoint of moldability, the content of pulverized polyurethane foam 11 is preferably equal to or less than 15% by mass, more preferably equal to or less than 10% by mass, and even more preferably equal to or less than 8% by mass. From these viewpoints, the content of pulverized polyurethane foam 11 is greater than 0% by mass and equal to or less than 15% by mass, preferably equal to or greater than 1% by mass and equal to or less than 10% by mass, and even more preferably equal to or greater than 2% by mass and equal to or less than 8% by mass.

[0016] (2) Other components of the mixed composition The mixed composition contains a polyol and a polyisocyanate in addition to the pulverized polyurethane foam 11. The mixed composition may also contain a foaming agent, a crosslinking agent, a catalyst, and other auxiliary agents as appropriate. Examples of the other auxiliary agents include a foam stabilizer and a colorant.

[0017] The polyol is not particularly limited, and polyols for polyurethane foams can be used, such as polyether polyols, polymer polyols, and polyester polyols.

[0018] Examples of polyether polyols include polyether polyols obtained by adding alkylene oxides such as ethylene oxide (EO) and propylene oxide (PO) to polyhydric alcohols such as ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, neopentyl glycol, glycerin, pentaerythritol, trimethylolpropane, sorbitol, and sucrose.

[0019] Examples of polymer polyols include polyols obtained by graft polymerizing a vinyl monomer onto a polyether polyol. Examples of the vinyl monomer include acrylonitrile, styrene, and methyl methacrylate. The content of the vinyl monomer unit (graft portion) in the polymer polyol is preferably 10 to 50 parts by mass based on the total amount of the polymer polyol and the polyether polyol.

[0020] Examples of polyester polyols include polyester polyols obtained by polycondensation of an aliphatic carboxylic acid such as malonic acid, succinic acid, or adipic acid, or an aromatic carboxylic acid such as phthalic acid, and an aliphatic glycol such as ethylene glycol, diethylene glycol, or propylene glycol.

[0021] The foaming agent may be water, a hydrocarbon such as a chlorofluorocarbon alternative or pentane, or carbon dioxide, either alone or in combination. When water is used, carbon dioxide is generated during the reaction between water and isocyanate, and the carbon dioxide generates foam.

[0022] Examples of the crosslinking agent include known crosslinking agents commonly used in polyurethane foams, such as polyhydric alcohols such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, glycerin, trimethylolpropane, pentaerythritol, and sorbitol, amines such as ethylenediamine, diethylenetriamine, hexamethylenediamine, hydrazine, diethyltoluenediamine, and diethylenetriamine, aminoalcohols such as diethanolamine and triethanolamine, and compounds in which ethylene oxide, polypropylene oxide, or the like is added to these active hydrogen compounds. The crosslinking agents may be used alone or in combination of two or more.

[0023] The catalyst may be a known urethanization catalyst, such as amine catalysts such as N,N-dimethylcyclohexylamine, N-methyldicyclohexylamine, triethylamine, triethylenediamine, diethanolamine, dimethylaminomorpholine, N-ethylmorpholine, and tetramethylguanidine, tin catalysts such as stannous octoate and dibutyltin dilaurate, and metal catalysts (also called organometallic catalysts) such as phenylmercury propionate and lead octenate.

[0024] The polyisocyanate is not particularly limited. Examples of polyisocyanates that can be used include aliphatic or aromatic polyisocyanates having two or more isocyanate groups, mixtures thereof, and modified polyisocyanates obtained by modifying these. Examples of aliphatic polyisocyanates include hexamethylene diisocyanate, isophorone diisocyanate, and dicyclohexamethane diisocyanate. Examples of aromatic polyisocyanates include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), naphthalene diisocyanate, xylylene diisocyanate, and polymeric polyisocyanate (crude MDI). Other prepolymers can also be used.

[0025] The NCO index of the components in the mixed composition other than the polyurethane foam pulverized material 11 is preferably 80 to 110, and more preferably 90 to 105. The NCO index is the value obtained by dividing the total number of isocyanate groups in the polyisocyanate by the total number of active hydrogens that react with the isocyanate groups, and multiplying this value by 100. In other words, the NCO index is 100 when the number of active hydrogens that react with the isocyanate groups is stoichiometrically equal to the number of isocyanate groups in the polyisocyanate.

[0026] In the components other than the polyurethane foam pulverized material 11 in the mixed composition, the content of polyisocyanate relative to 100 parts by mass of the total amount of polyol is preferably 27 parts by mass or more and 38 parts by mass or less, more preferably 29 parts by mass or more and 36 parts by mass or less, and even more preferably 30 parts by mass or more and 34 parts by mass or less.

[0027] 2. Method for producing polyurethane foam molded body 10 The polyurethane foam molded body 10 can be obtained by, for example, foaming a mixed composition of polyol, polyisocyanate, and pulverized polyurethane foam 11.

[0028] The pulverized polyurethane foam 11 can be obtained by pulverizing the polyurethane foam. Here, "pulverization" refers to breaking down the polyurethane foam into smaller pieces, and the method of pulverization is not particularly limited. The polyurethane foam may be broken down into smaller pieces by grinding, polishing, grinding, cutting, or cutting. The pulverized polyurethane foam 11 may also be classified after the polyurethane foam is pulverized.

[0029] The polyurethane foam can be pulverized using, for example, a pulverizer or grinder. The pulverizer is not particularly limited. By appropriately changing the blades of the pulverizer and the pulverization time, pulverized polyurethane foam 11 of a desired size can be obtained. The grinder is not particularly limited. By appropriately changing the grinding stone used in the grinder and the rotation speed of the grinding stone, pulverized polyurethane foam 11 of a desired size can be obtained.

[0030] The polyurethane foam is classified, for example, by sieving using a sieve having openings of a predetermined size. In classifying the polyurethane foam, the pulverized material 11 may be obtained as a fraction that passes through a predetermined (first) sieve, or as a fraction that does not pass through a predetermined (second) sieve, depending on the performance required of the product.

[0031] In the method for producing the polyurethane foam molded article 10, the method for obtaining the mixed composition is not particularly limited. An example of the method for obtaining the mixed composition will be described. A first raw material containing a polyol and a second raw material containing a polyisocyanate are prepared. At least one of the first raw material and the second raw material further contains pulverized polyurethane foam 11. The first raw material and the second raw material are mixed to obtain the mixed composition. By obtaining the mixed composition in this manner, the pulverized polyurethane foam 11 can be sufficiently mixed with other components before the reaction between the polyol and the polyisocyanate progresses.

[0032] When the amount (parts by mass) of polyol in the mixed composition is greater than the amount (parts by mass) of polyisocyanate, it is preferable that the first raw material contains pulverized polyurethane foam 11. That is, it is preferable to obtain the mixed composition by mixing the first raw material containing polyol and pulverized polyurethane foam 11 with the second raw material containing polyisocyanate. The first raw material may further contain components other than the isocyanate in the mixed composition, such as a blowing agent, a crosslinking agent, a catalyst, etc. The first raw material containing polyol and pulverized polyurethane foam 11 may become more viscous than before the addition of pulverized polyurethane foam 11, and may even lose fluidity. The greater the content of pulverized polyurethane foam 11 in the first raw material and the larger the size of pulverized polyurethane foam 11, the more likely the fluidity of the first raw material will decrease. In this embodiment, by appropriately designing the content of pulverized polyurethane foam 11 and the size of pulverized polyurethane foam 11 as described above, polyurethane foam molded body 10 can be suitably molded.

[0033] The molding method for polyurethane foam molded body 10 is not particularly limited, and known methods such as mold molding and slab molding can be used. In the case of mold molding, for example, a mixed composition is filled into a mold and foamed inside the mold to obtain polyurethane foam molded body 10. That is, polyurethane foam molded body 10 may be a molded product. In polyurethane foam molded body 10, pulverized polyurethane foam 11 and a portion other than pulverized polyurethane foam 11 12 do not need to be clearly distinguished from each other; when a cross section of polyurethane foam molded body 10 is visually inspected, the two may be indistinguishable. In FIG. 1, pulverized polyurethane foam 11 is schematically indicated by a two-dot chain line.

[0034] 3. Properties and Uses of Polyurethane Foam Molded Product 10 The polyurethane foam molded body 10 may be any of soft, semi-rigid, and hard. The polyurethane foam molded body 10 can be made soft, semi-rigid, and hard by, for example, appropriately designing the types of polyol, polyisocyanate, blowing agent, and the like in the mixed composition. From the viewpoint of sound absorption and vibration damping, the polyurethane foam molded body 10 is preferably soft. Furthermore, from the viewpoint of sound absorption, the polyurethane foam molded body 10 preferably has an open-cell structure.

[0035] There are no particular limitations on the density of the polyurethane foam molded body 10. The density of the polyurethane foam molded body 10 measured in accordance with JIS K 7222:2005 is, for example, 50 kg / m 3 -250kg / m 3 may be. There are no particular limitations on the 25% compression hardness of polyurethane foam molded article 10. The 25% compression hardness of polyurethane foam molded article 10 measured in accordance with JIS K6400-2:2004 Method D may be, for example, 30 kPa to 350 kPa.

[0036] The polyurethane foam molding 10 preferably has a sound-absorbing function. The polyurethane foam molding 10 is suitable as a sound-absorbing member. In reverberation chamber sound absorption coefficient measurement based on JIS A 1409:1998, the polyurethane foam molding 10 preferably has an average sound absorption coefficient of 0.50 or more in the range of 1.0 kHz to 6.3 kHz. The average sound absorption coefficient is more preferably 0.55 or more, and even more preferably 0.60 or more. The sound absorption coefficient is measured at frequencies of 1000Hz, 1250Hz, 1600Hz, 2000Hz, 2500Hz, 3150Hz, 4000Hz, 5000Hz, and 6300Hz using a measurement sample measuring 1m x 1m x 20mm thick. The arithmetic mean of the sound absorption coefficients at these frequencies is taken as the average sound absorption coefficient. At this time, the outer periphery of the measurement sample is covered with an aluminum fixture, and the gap between the test piece and the fixture is sealed with aluminum tape.

[0037] The polyurethane foam molded article 10 preferably has a vibration-damping function. The polyurethane foam molded article 10 is suitable as a vibration-damping member. The polyurethane foam molded article 10 preferably has a loss factor of 0.20 or more at an anti-resonance point near 450 Hz, as measured in accordance with JIS K 7391:2008. The loss factor is more preferably 0.24 or more, and even more preferably 0.26 or more. The anti-resonance point near 450 Hz is typically an anti-resonance point that appears between 300 Hz and 600 Hz. The loss factor is measured using a measurement sample measuring 30 mm x 300 mm x 20 mm thick, with a 2 mm thick iron plate placed underneath the measurement sample.

[0038] 3. Effects of this embodiment According to this embodiment, an article having desired properties can be provided using the polyurethane foam pulverized material 11. Examples of the desired properties of the polyurethane foam molded article 10 include sound absorption and vibration damping. In addition, the polyurethane foam molded article 10 may also have heat insulation, cushioning, shock absorption, etc.

[0039] Scraps generated during production and scraps and scraps that would otherwise be discarded can be used for the polyurethane foam pulverized material 11. This allows us to propose an environmentally friendly polyurethane foam molded product 10 with minimal material waste.

[0040] When the polyurethane foam molding 10 has a sound absorbing function, it is suitable as a sound absorbing member. When the polyurethane foam molding 10 has a vibration damping function, it is suitable as a vibration damping member. [Example]

[0041] The present invention will be explained in more detail below with reference to examples.

[0042] 1. Preparation of Examples 1-6 and Comparative Examples 1 and 2 The pulverized product of Example 1 was obtained by pulverizing a rigid polyurethane foam using a pulverizer and passing through a sieve with an opening diameter of 3 mm. A pulverizer (model number: PI2060) manufactured by Horai Co., Ltd. was used for pulverization. The rigid polyurethane foam used for pulverization was prepared as follows: Liquid A for pulverization and Liquid B for pulverization shown below were weighed out in a ratio of 100:163, and the liquid temperature was adjusted to approximately 20°C. Liquid B for pulverization was then added to Liquid A for pulverization, and the mixture was stirred at 3000 rpm for 5 seconds. The mixture was poured into a mold and cured to obtain a rigid polyurethane foam. The density of the rigid polyurethane foam was 35 kg / m 3 It was decided. Liquid A for crushed materials: Actcoal SK-1907 (manufactured by Mitsui Chemicals SKC Polyurethanes) Liquid B for crushed materials: Cosmonate MC-400HW (Mitsui Chemicals SKC Polyurethanes)

[0043] A mixed composition of the pulverized material thus prepared, a polyol, and a polyisocyanate was foamed to produce a polyurethane foam molded article of Example 1. The manufacturing process of the polyurethane foam molding is shown in detail below. Polyol 1 (molecular weight 5000, functionality 3, hydroxyl value 33.5 mgKOH / g) 90 parts by mass, polyol 2 (polymer polyol, solid polymer content 20%, molecular weight 5000, hydroxyl value 28 mgKOH / g) 10 parts by mass, light stabilizer (STAB UV65, manufactured by SONGWON), crosslinker (diethanolamine, DEA-LF, manufactured by Mitsui Chemicals), 1.5 parts by mass, catalyst 1 (NE1070, manufactured by Air Products), 0.5 parts by mass, catalyst 2 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 3 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 4 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 5 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 6 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 7 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 8 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 9 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 10 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 11 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 12 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 13 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 14 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 15 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 16 (NE300, manufactured by Air Products), 0.5 parts by mass, catalyst 17 (NE Liquid A for molding (first raw material) was prepared by mixing 0.25 parts by mass of catalyst 3 (D-60, manufactured by Tosoh Corporation), 0.7 parts by mass of catalyst 3 (D-60, manufactured by Tosoh Corporation), 0.1 parts by mass of foam stabilizer (B8738LF2, manufactured by EVONIK), 1.5 parts by mass of pigment (PC4114T-T, manufactured by Dainippon Ink Co., Ltd.), 2.5 parts by mass of interconnecting agent (CP1421, manufactured by Dow Chemical Industry Co., Ltd.), 1.08 parts by mass of blowing agent (water), and pulverized polyurethane foam. The blending amount of pulverized polyurethane foam was 2.5% by mass, assuming the total raw material for the polyurethane foam molding, including the pulverized polyurethane foam, to be 100% by mass.

[0044] To the obtained liquid A for molding, liquid B for molding (second raw material) was added and stirred to obtain a mixed composition. As liquid B for molding, isocyanate (diphenylmethane diisocyanate, 600B-1, manufactured by BASF INOAC Polyurethanes) was used. The blending amount of liquid B for molding was 31.1 parts by mass per 100 parts by mass of the total amount of polyol 1 and polyol 2. The obtained mixed composition was filled into a mold (forming tool) and foamed in the mold. The density of the polyurethane foam molded product was 200 kg / m 3 It was decided.

[0045] In Example 2, the blending amount of the pulverized polyurethane foam was 5.0 mass %. Otherwise, a polyurethane foam molded article was obtained in the same manner as in Example 1. In Example 3, the pulverized product was obtained as the fraction that did not pass through a sieve with an opening diameter of 10 mm. Except for this, a polyurethane foam molded product was obtained in the same manner as in Example 1. In Example 4, the density of the polyurethane foam molding was 135 kg / m 3 Other than that, a polyurethane foam molded article was obtained in the same manner as in Example 1. In Example 5, the blending amount of the pulverized polyurethane foam was 5.0 mass %, and the density of the polyurethane foam molding was 135 kg / m 3 Other than that, a polyurethane foam molded article was obtained in the same manner as in Example 1. In Example 6, the pulverized material was obtained as the fraction that did not pass through a sieve with an opening diameter of 10 mm, and the density of the polyurethane foam molding was 135 kg / m 3 Other than that, a polyurethane foam molded article was obtained in the same manner as in Example 1.

[0046] In Comparative Example 1, no pulverized polyurethane foam was blended in. Otherwise, a polyurethane foam molded article was obtained in the same manner as in Example 1. In Comparative Example 2, no pulverized polyurethane foam was blended, and the density of the polyurethane foam molding was 135 kg / m 3 Other than that, a polyurethane foam molded article was obtained in the same manner as in Example 1.

[0047] 2. Evaluation Method <Sound absorption> The average sound absorption coefficient of the sample for measuring sound absorption coefficient in a reverberation chamber was calculated in the range of 1.0 kHz to 6.3 kHz using a method described in an embodiment in accordance with JIS A 1409: 1998. The higher this average sound absorption coefficient, the better the sound absorption of the sample.

[0048] [Table 1]

[0049] <Vibration damping> The loss factor at the anti-resonance point around 450 Hz of the sample for measuring the loss factor related to vibration damping was determined using a method described in an embodiment in accordance with JIS K 7391: 2008. The higher the loss factor, the better the vibration damping property of the sample.

[0050] [Table 2]

[0051] 3.Results The sound absorption coefficients of Examples 1-6 and Comparative Examples 1 and 2 are shown in Table 1. The "Sound absorption coefficient" column shows the average sound absorption coefficients obtained using the above evaluation method. The loss factors of Examples 1-3 and Comparative Example 1 are shown in Table 2 and the graph in Figure 2. The "Loss factor" column in Table 2 shows the loss factor obtained using the above evaluation method. Figure 2 is a graph showing the relationship between frequency and loss factor. The horizontal axis shows frequency (Hz) and the vertical axis shows loss factor.

[0052] The average sound absorption coefficient of Examples 1-6 was 0.50 or more in the range of 1.0 kHz to 6.3 kHz. It was suggested that Examples 1-6 had sound absorption properties and could be used as sound-absorbing materials. The sound absorption coefficient of Examples 1-3 was higher than that of Comparative Example 1. Furthermore, the sound absorption coefficient of Examples 4-6 was higher than that of Comparative Example 2. It was suggested that the sound absorption properties of polyurethane foam molded articles can be improved by using pulverized polyurethane foam.

[0053] In Examples 1-3, the loss factor at the anti-resonance point near 450 Hz (anti-resonance point -3 shown in Table 2) was 0.20 or more. It was suggested that Examples 1-3 have vibration-damping properties and can be used as vibration-damping members. The loss factor of Examples 1-3 was higher than that of Comparative Example 1. It was suggested that even a polyurethane foam molded product using pulverized polyurethane foam can achieve vibration-damping performance equal to or better than that of a polyurethane foam molded product not using pulverized polyurethane foam.

[0054] 4. Effects of the Example According to the above examples, it is possible to ensure the desired physical properties of the article using the pulverized polyurethane foam.

[0055] The present disclosure is not limited to the above-described embodiments, and various modifications and variations are possible. [Explanation of symbols]

[0056] 10...Polyurethane foam molding 11... Crushed material 12...Parts other than crushed material

Claims

1. A polyurethane foam molded article obtained by foaming a mixed composition of a polyol, a polyisocyanate, and pulverized polyurethane foam, The size of the pulverized material is 0.5 mm or more, Density is 135 kg / m ３ The polyurethane foam molding described above.

2. A polyurethane foam molded product containing more than 0% by mass and 15% by mass or less of pulverized polyurethane foam, The size of the pulverized material is 0.5 mm or more, Density is 135 kg / m ３ The polyurethane foam molding described above.

3. 3. The polyurethane foam molded article according to claim 1, wherein the average sound absorption coefficient in the range of 1.0 kHz to 6.3 kHz is 0.50 or more in a reverberation chamber sound absorption coefficient measurement according to JIS A 1409:1998.

4. The polyurethane foam molded article according to any one of claims 1 to 3, which has a loss factor of 0.20 or more at an anti-resonance point around 450 Hz, measured in accordance with JIS K 7391:2008.

5. A sound-absorbing member comprising the polyurethane foam molded article according to any one of claims 1 to 4.

6. A vibration-damping member comprising the polyurethane foam molded article according to claim 1 .

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