Polyurethane foam decomposition processing device and polyurethane foam decomposition processing method

Abstract

The decomposition processing device (20) of the polyurethane foam (11) comprises a container (30) containing the polyurethane foam (11) and the decomposition agent (13), a pressing part (21) for pressing the polyurethane foam (11) in the container (30), and a heating part (23) for heating the interior of the container (30). The container (30) has a retention part (31) for retaining the liquid substance (10) containing the decomposition product of the polyurethane foam (11) and the decomposition agent (13). The pressing section (21) is configured so as to press the polyurethane foam (11) downward and press the polyurethane foam (11) into the liquid (10) in the retention section (31).

Description

Technical Field

[0001] The present disclosure relates to a polyurethane foam decomposition treatment device and a polyurethane foam decomposition treatment method. This application is based on and claims the benefit of priority of Japanese Patent Application No. 2022-149955 filed on September 21, 2022, and all the contents of the patent application are incorporated into this specification by reference. Background Art

[0002] Patent Document 1 discloses a method for decomposing a hard urethane resin. The method includes a decomposition step of placing a hard urethane resin and an amine compound as a decomposition agent into an extruder and heating them to 140 to 300° C. to decompose urethane bonds of the hard urethane resin.

[0003] Prior art literature Patent Literature Patent Document 1: Japanese Patent Application Publication No. 2004-292661 Summary of the invention Problem that the invention aims to solve When the polyurethane foam and the decomposition agent are mixed and decomposed using an extruder, it is difficult to control the mixing state of the polyurethane foam and the decomposition agent and the decomposition reaction. Therefore, there is a problem that the quality of the obtained decomposition product is unstable, such as undecomposed polyurethane foam is discharged from the extruder.

[0004] The present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide a method for decomposing polyurethane foam and a device for decomposing polyurethane foam that can obtain polyol with stable quality. The present disclosure can be implemented in the following aspects.

[0005] Means used to solve problems [1] A polyurethane foam decomposition treatment device, comprising: Container, containing polyurethane foam and disintegrator, a pressing part that presses the polyurethane foam in the container, and A heating unit for heating the inside of the container; The container has a retention portion for retaining a liquid substance containing the decomposition product of the polyurethane foam and the decomposition agent. The pressing portion is configured to press the polyurethane foam downward to push the polyurethane foam into the liquid substance in the retention portion.

[0006] Effects of the Invention According to the present disclosure, a polyol having stable quality can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a diagram schematically showing a decomposition processing device according to one embodiment.

[0008] Figure 2 It is a figure which shows the state of injecting polyurethane foam.

[0009] Figure 3 It is a figure which shows the state of pressing polyurethane foam.

[0010] Figure 4 It is a figure which shows the state which presses the polyurethane foam which concerns on another embodiment. DETAILED DESCRIPTION

[0011] Preferred examples of the present disclosure are shown here.

[0012] [2] According to the polyurethane foam decomposition treatment device described in [1], A discharge port for the liquid substance is formed at a position higher than the inner bottom surface of the container. A portion of the container that is lower than the lower end of the discharge port is the stagnation portion.

[0013] [3] A method for decomposing polyurethane foam, Add polyurethane foam and decomposition agent into the container. heating the container containing the polyurethane foam and the decomposing agent, allowing a liquid containing the decomposition product of the polyurethane foam and the decomposition agent to remain in the container, The undecomposed polyurethane foam is pressed downward to be pressed into the retained liquid.

[0014] The present disclosure is described in detail below. In addition, in this specification, regarding the numerical range, in the description using "-", unless otherwise specified, the lower limit and the upper limit are included. For example, in the description such as "10-20", both "10" as the lower limit and "20" as the upper limit are included. That is, "10-20" has the same meaning as "10 or more and 20 or less".

[0015] like Figures 1 to 3As shown in FIG. 1 , the decomposition treatment device 20 of the polyurethane foam 11 of the present embodiment includes a container 30 for placing the polyurethane foam 11 and the decomposition agent 13, a pressing portion 21 for pressing the polyurethane foam 11 in the container 30, and a heating portion 23 for heating the inside of the container 3. The container 30 includes a retention portion 31 for retaining the liquid 10 containing the decomposition product of the polyurethane foam 11 and the decomposition agent 13. The pressing portion 21 is configured to press the polyurethane foam 11 downward, thereby pressing the polyurethane foam 11 into the liquid 10 in the retention portion 31. In each figure, the Y-axis direction is the up-down direction, and the X-axis direction is the direction orthogonal to the Y-axis direction.

[0016] The polyurethane foam 11 may be any one of soft polyurethane foam, semi-rigid polyurethane foam and rigid polyurethane foam. The polyurethane foam 11 may be a polyurethane foam with a continuous cell structure or a polyurethane foam with an independent cell structure. The polyurethane foam 11 may be a crushed product crushed into a prescribed size. Examples of the crushed product of the polyurethane foam 11 include end materials discharged during the manufacturing process of the polyurethane foam 11 or crushed products obtained by crushing the used polyurethane foam 11 that is scheduled to be discarded. In addition, the crushed product of the polyurethane foam 11 may also be residues or scraps of the polyurethane foam 11 discharged during the manufacturing process of the polyurethane foam 11.

[0017] There is no particular limitation on the maximum diameter of the polyurethane foam 11. In consideration of ease of introduction into the container 30 and decomposition speed, the maximum diameter of the polyurethane foam 11 can be, for example, 2 cm or more and 30 cm or less.

[0018] The decomposing agent 13 is not particularly limited as long as it is a substance that chemically decomposes the urethane bond to liquefy it, but a compound having a hydroxyl group or an amine compound is preferred from the viewpoint of reactivity and cost.

[0019] Examples of compounds having a hydroxyl group include ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, trimethylene glycol, 1,4-butylene glycol, 1,5-pentanediol, 1,6-hexanediol, polyoxyethylene glycol, polyoxypropylene glycol, glycerol, polyethylene glycol, etc. These compounds having a hydroxyl group can be used alone or in combination of two or more. Among them, dipropylene glycol and 1,4-butylene glycol are preferred.

[0020] In addition, examples of amine compounds include ethylenediamine, tetramethylenediamine, hexamethylenediamine, propylenediamine, 2-ethylhexylamine, isopropanolamine, 2-(2-aminoethylamino)ethanol, 2-amino-2-hydroxymethyl-1,3-propanediol, ethylethanolamine, aminobutanol, n-propylamine, di-n-propylamine, n-pentylamine, isobutylamine, methyldiethylamine, monoethanolamine, diethanolamine, triethanolamine, cyclohexylamine, piperazine, piperidine, aniline, toluidine, benzylamine, phenylenediamine, toluenediamine, 4-4'-diaminodiphenylmethane (4-4'-diphenylmethanediamine), xylylenediamine, chloroaniline, pyridine, picoline, N-methylmorpholine, ethylmorpholine, pyrazole, etc. These amine compounds can be used alone or in combination of two or more. Among them, diethanolamine and triethanolamine are preferred.

[0021] The amount of the decomposing agent 13 added is preferably 5 parts by mass or more and 30 parts by mass or less, and more preferably 10 parts by mass or more and 20 parts by mass or less, relative to 100 parts by mass of the polyurethane foam.

[0022] In the decomposition reaction using the decomposition agent 13, a decomposition catalyst can be further added as necessary to increase the reaction rate.

[0023] As the catalyst to be added, a catalyst used in the production of polyurethane foam is preferred, and examples thereof include triethylamine, N,N-dimethylcyclohexylamine, N,N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethyl-1,3-propylenediamine, N,N,N',N'-tetramethyl-1,6-hexanediamine, N,N,N',N",N"-pentamethyldiethylenetriamine, N,N,N',N",N"-pentamethyldipropylenetriamine, tetramethylguanidine, triethylenediamine, N,N'-dimethylpiperazine, N,N'-methyl, N'-(2-dimethylamino)- Ethylpiperazine, N-methylmorpholine, N-(N',N'-dimethylaminoethyl)-morpholine, 1,2-dimethylimidazole, hexamethylenetetramine, dimethylaminoethanol, dimethylaminoethoxyethanol, N,N,N'-trimethylaminoethylethanolamine, N-methyl-N'-(2-hydroxyethyl)-piperazine, N-(2-hydroxyethyl)morpholine, bis(2-dimethylaminoethyl)ether, ethylene glycol bis(3-dimethyl)-aminopropyl ether, diazabicycloundecene, stannous octoate octoate), dibutyltin diacetate, dibutyltin dilaurate, dibutyltin mercaptide, dibutyltin thiocarboxylate, dibutyltin dimaleate, dioctyltin mercaptide, dioctyltin thiocarboxylate, lead octoate, zinc octoate, calcium octoate, potassium acetate, potassium octoate, etc. Among them, triethylenediamine, diazabicycloundecene, potassium acetate, and potassium octoate are preferred.

[0024] The amount of the catalyst added is more preferably 1 part by mass or more and 30 parts by mass or less, and further preferably 5 parts by mass or more and 20 parts by mass or less, relative to 100 parts by mass of the decomposition agent.

[0025] Next, the decomposition treatment device 20 will be described. The decomposition treatment device 20 includes a container 30, a pressing portion 21, and a heating portion 23. The decomposition treatment device 20 may further include a decomposition agent input portion 25 for inputting the decomposition agent 13. The decomposition agent input portion 25 is, for example, not a method of spraying the decomposition agent 13 on the polyurethane foam 11, but a method of directly inputting the decomposition agent 13 without converting the decomposition agent 13 into a mist. Figure 2 and Figure 3 The decomposition treatment device 20 is provided with a decomposition agent introduction part 25 in the form of an opening above an introduction port 36 described later. The decomposition agent 13 is delivered to the decomposition agent introduction part 25 by a pump or the like and is directly introduced into the container 30. Figure 2 and Figure 3 In FIG. 1 , the decomposing agent 13 is schematically shown by black dots.

[0026] As long as the container 30 can contain the polyurethane foam 11 and the decomposition agent 13, other structures are not particularly limited. For example, the container 30 has a bottom wall portion 33 and a side wall portion 34 rising from the periphery of the bottom wall portion 33. The bottom wall portion 33 is in a flat plate shape such as a circle or a rectangle. The side wall portion 34 is in a cylindrical shape such as a cylinder or a square cylinder. Considering the heating efficiency and the frequency of the introduction of the polyurethane foam 11, when the bottom wall portion 33 is circular, the height of the container 30 is preferably not less than 1 times and not more than 5 times the diameter of the bottom wall portion 33, and when the bottom wall portion 33 is rectangular, the height of the container 30 is preferably not less than 1 times and not more than 5 times the diagonal length of the bottom wall portion 33.

[0027] The container 30 has a retention portion 31 that retains the liquid 10 containing the decomposition product of the polyurethane foam 11 and the decomposition agent 13. The retention portion 31 has no particular limitation on other structures as long as it can retain the liquid 10. For example, the retention portion 31 can be composed of a portion from the inner bottom surface 33A of the container 30 to a predetermined height of the container 30. The predetermined height of the container 30 can be set to a height of not less than 1 / 10 and not more than 1 / 2 of the height of the container 30. Figure 2 and Figure 3 , the range of the retention part 31 is indicated by an arrow. The undecomposed polyurethane foam 11 can be accommodated in a position above the retention part 31 in the container 30. In the present disclosure, the undecomposed polyurethane foam 11 includes the solid polyurethane foam 11 that has been partially decomposed and is in the process of decomposition. In addition, the undecomposed polyurethane foam 11 may also exist in the retention part 31.

[0028] In the present embodiment, a discharge port 35 for the liquid substance 10 is formed at a position higher than the inner bottom surface 33A of the container 30, and a portion of the container 30 lower than the lower end of the discharge port 35 is provided as a retention portion 31. The structure of the discharge port 35 is not particularly limited. The discharge port 35 is, for example, opened at the side wall portion 34 of the container 30. The discharge port 35 of the present embodiment has a simple structure without an opening and closing mechanism, and is always in an open state. Figure 3 As shown in FIG. 1 , when the liquid level of the liquid substance 10 in the container 30 reaches the lower end of the discharge port 35, the excess liquid substance 10 flows out from the discharge port 35. That is, by adjusting the lower end position of the discharge port 35, the amount of the liquid substance 10 in the container 30 can be adjusted. In consideration of the decomposition efficiency, the lower end position of the discharge port 35 is preferably lower than the position of 1 / 2 of the height of the container 30, and more preferably a position in the container 30 that can be heated to 150° C. or higher by the heating unit 23.

[0029] The container 30 is formed with an inlet 36 for injecting the polyurethane foam 11 at a position higher than the stagnation part 31. The inlet 36 of the present embodiment is also an inlet for injecting the decomposition agent 13. The container 30 of the present embodiment can be filled with undecomposed polyurethane foam 11 above the stagnation part 31. The polyurethane foam 11 located above the stagnation part 31 covers the stagnation part 31, which can play the role of suppressing the heat in the stagnation part 31 from escaping upward or retaining the gas generated in the stagnation part 31 in the container 30.

[0030] The container 30 may also include a restriction portion 37 that restricts the undecomposed polyurethane foam 11 from flowing out of the discharge port 35. The restriction portion 37 may also play the role of restricting the undecomposed polyurethane foam 11 from covering and blocking the discharge port 35, restricting the undecomposed polyurethane foam 11 from being blocked in the discharge port 35, and the like. Figure 3 As shown, the restricting portion 37 of the present embodiment covers the discharge port 35 from the stagnation portion 31 side so as to narrow the path of the undecomposed urethane foam 11 from the stagnation portion 31 toward the discharge port 35 .

[0031] The pressing portion 21 presses the polyurethane foam 11 in the container 30. The pressing portion 21 is configured to press the polyurethane foam 11 downward and press the polyurethane foam 11 into the liquid substance 10 in the retention portion 31. Other structures of the pressing portion 21 are not particularly limited. For example, the pressing portion 21 has a planar pressing surface 21A that presses the polyurethane foam 11. The pressing portion 21 can be configured to compress the polyurethane foam 11 between the pressing surface 21A and the inner bottom surface 33A of the container 30. According to such a structure, the polyurethane foam 11 can be evenly compressed between the pressing surface 21A and the inner bottom surface 33A of the container 30, and it is difficult to produce differences in the progress of decomposition of the polyurethane foam 11 due to differences in the degree of compression or heating.

[0032] The pressing portion 21 applies force downward without applying shear force to the polyurethane foam 11. "Not applying shear force" means not applying the shear force applied during extrusion by the extruder. As a method of applying force without applying shear force, there can be cited a method of applying force in a manner that the solid polyurethane foam 11 is compressed in one direction without breaking. Specifically, there is an example of a method of using a power cylinder to move the pressing surface 21A downward. The pressing portion 21 is configured to be able to move up and down so that the position of the pressing surface 21A is not lower than the lower end of the discharge port 35.

[0033] There is no particular limitation on the compressive stress generated by the pressing portion 21. The compressive stress generated by the pressing portion 21 may be large enough to sufficiently press the polyurethane foam 11, and for example, in the case of soft polyurethane foam, it may be 5 kPa to 15 kPa.

[0034] The heating unit 23 heats the inside of the container 30. The heating unit 23 may be provided in contact with a portion below the position of 1 / 2 of the height of the container 30. For example, the heating unit 23 includes a heater (heat source) and is provided in contact with the lower surface of the bottom wall portion of the container 30. On the other hand, the heating unit 23 is not provided at a portion (the upper portion of the container 30) where the inlet 36 is provided. In the decomposition treatment of the polyurethane foam 11, it is preferable not to heat the polyurethane foam 11 above the retention portion 31, especially near the inlet 36. That is, the container 30 may be configured such that the decomposition reaction mainly proceeds at the lower portion (the retention portion 31 side) and the polyurethane foam 11 is stored at the upper portion (the inlet 36 side). According to the above configuration, the decomposition reaction of the polyurethane foam 11 can be promoted at the discharge port 35 side of the container 30, while the decomposition reaction of the polyurethane foam 11 can be suppressed at the inlet 36 side. For example, the decomposition reaction of the polyurethane foam by the decomposing agent 13 hardly proceeds under the condition of non-heating (for example, 50° C. or less) and less than 10 hours. Therefore, it is possible to suppress the decomposition reaction of the polyurethane foam 11 from unintentionally proceeding when the polyurethane foam 11 is put in, and the decomposition product is prevented from adhering to the periphery of the inlet 36 or the pressing part 21, etc. In the decomposition treatment of the polyurethane foam 11, in order to obtain a decomposition product with stable quality, it is effective to clean the decomposition treatment device 20 for each type of polyurethane foam 11 to be treated. As described above, by separating the heating portion and the non-heating portion in the container 30, the adhesion of the decomposition product can be restricted, and the cleaning of the container 30 can be facilitated. In addition, during the decomposition reaction of the polyurethane foam 11, the portion without the polyurethane foam 11 is not heated unnecessarily, so that the energy efficiency during heating can be improved.

[0035] Next, an example of a method for decomposing the polyurethane foam 11 is described with reference to Figure 2 and Figure 3 The method for decomposing the polyurethane foam 11 is to add the polyurethane foam 11 and the decomposing agent 13 into a container 30, and heat the container 30 containing the polyurethane foam 11 and the decomposing agent 13, so that the liquid 10 containing the decomposition product of the polyurethane foam 11 and the decomposing agent 13 is retained in the container 30, and the undecomposed polyurethane foam 11 is pressed downward and pressed into the retained liquid 10.

[0036] In the method for decomposing the polyurethane foam 11, the form of adding the polyurethane foam 11 and the decomposing agent 13 is not particularly limited. When adding the polyurethane foam 11 and the decomposing agent 13, for example, an appropriate amount of the decomposing agent 13 is added from the decomposing agent adding part 25 according to the amount of the polyurethane foam 11. In addition, before starting the decomposition treatment, the decomposing agent 13 other than the amount may be added to the retention part 31 in advance, and then an appropriate amount of the decomposing agent 13 may be added from the decomposing agent adding part 25 according to the amount of the polyurethane foam 11. In this way, the liquid 10 containing a sufficient amount of the decomposing agent 13 can be retained in the retention part 31 from the initial stage of the decomposition treatment. Furthermore, from the viewpoint of simplicity, the decomposing agent 13 may be directly added to the container 30 without applying it on the polyurethane foam 11 in advance. In addition, since the polyurethane foam 11 and the decomposing agent 13 can be fully contacted in the liquid 10, it does not matter if the polyurethane foam 11 and the decomposing agent 13 are not added at the same time.

[0037] The heating energy in the container 30 containing the polyurethane foam 11 and the decomposition agent 13 can be performed by the heating unit 23. The heating temperature in the container 30 is not particularly limited. The heating temperature in the container 30 is preferably 150°C or more and 250°C or less, and more preferably 170°C or more and 230°C or less. The heating temperature in the container 30 is the temperature of the highest temperature portion in the container 30. In the present embodiment, the set temperature of the heating unit 23 can also be regarded as the heating temperature in the container 30. If the portion where the polyurethane foam 11 and the decomposition agent 13 are in contact in the container 30 is heated, the polyurethane foam 11 is decomposed to generate a liquid decomposition product. The liquid decomposition product contains a polyol 15 derived from the raw material polyol of the polyurethane foam 11, an amine component 16 derived from the raw material isocyanate, and the like. The liquid decomposition product flows downward and is retained in the retention portion 31 together with the decomposition agent 13.

[0038] In the decomposition treatment method of the polyurethane foam 11, the undecomposed polyurethane foam 11 is pressed downward by the pressing part 21 and pressed into the retained liquid 10. The pressed undecomposed polyurethane foam 11 contacts the decomposition agent 13 in the liquid 10 and is heated. As a result, the polyurethane foam 11 is decomposed and further generates liquid decomposition products. If the decomposition of the polyurethane foam 11 is in progress and the liquid level of the liquid 10 reaches the lower end of the discharge port 35, the liquid 10 is discharged from the discharge port 35. The discharged liquid 10 is appropriately recovered. For example, a recovery container 40 is arranged below the discharge port 35, and the decomposition product flowing down from the discharge port 35 is recovered in the recovery container 40. The polyol 15 can be purified from the recovered decomposition product by a known method to obtain a regenerated polyol 15. In addition, in addition to the polyol 15, various components can also be purified from the recovered decomposition product to obtain a regenerated raw material.

[0039] Next, the effects of the present embodiment will be described. The decomposition treatment device 20 and the decomposition treatment method of the polyurethane foam 11 of the present embodiment are to press the polyurethane foam 11 downward and press the polyurethane foam 11 into the liquid 10 in the retention part 31. In this way, the decomposition agent 13 and the polyurethane foam 11 can be brought into contact in the liquid 10. Therefore, for example, even if the decomposition agent 13 is not evenly applied to the surface of the polyurethane foam 11, or the polyurethane foam 11 and the decomposition agent 13 are not simultaneously added at a predetermined ratio, the contact efficiency between the polyurethane foam 11 and the decomposition agent 13 can be improved. In addition, heat can be transferred to the polyurethane foam 11 via the liquid 10, for example, compared with the case where heat is transferred to the polyurethane foam 11 via air, the heating efficiency of the polyurethane foam 11 can be improved. Furthermore, according to the types of the polyol 15 and the amine component 16 contained in the liquid 10, the generated polyol 15 and / or the amine component 16 itself can function as the decomposition agent 13, which helps the decomposition of the polyurethane foam 11. In this way, the polyurethane foam 11 can be fully decomposed, and a decomposed product having stable quality can be obtained.

[0040] In the past, the extruder or kneading machine that is often used in the decomposition treatment of the polyurethane foam 11 is relatively expensive, and it is troublesome to remove the decomposition products in the device. On the other hand, the decomposition treatment device 20 of the present embodiment can be a structure that is cheaper and simpler than an extruder or a kneading machine, and it is also easier to remove the decomposition products in the device. Furthermore, the decomposition treatment device 20 of the present embodiment is less likely to discharge the undecomposed polyurethane foam 11 compared with a structure that forcibly extrude the contents like an extruder. Therefore, a decomposition product with stable quality can be obtained.

[0041] In addition, the decomposition treatment device 20 of the present embodiment forms a discharge port 35 for the liquid material 10 at a position higher than the inner bottom surface 33A of the container 30, and a portion of the container 30 lower than the lower end of the discharge port 35 is used as a retention portion 31. According to this structure, the retention portion 31 can be formed with a simple structure. In addition, the decomposed products of the polyurethane foam 11 can be discharged sequentially from the discharge port 35, and there is no need to spend time to coordinate the progress of the reaction (end point) and the timing of discharge. In addition, compared with a structure in which the discharge port is formed at the bottom of the container, the undecomposed polyurethane foam 11 is less likely to be pressed into the discharge port 35. Therefore, the undecomposed polyurethane foam 11 is less likely to clog the discharge port 35.

[0042] <Other embodiments> The present disclosure is not limited to the embodiments illustrated in the above description and drawings. For example, the following embodiments are also included in the technical scope of the present disclosure.

[0043] (1) The retention portion is not limited to a portion of the container that is lower than the lower end of the discharge port. For example, the retention portion may be configured such that an opening and closing mechanism such as a valve is provided at the discharge port, and the liquid is retained by closing the valve. In this case, the valve may be opened as needed to discharge excess liquid.

[0044] (2) The pressing part may be a method other than a hydraulic cylinder or the like, or a method of applying a load to the polyurethane foam using a weight. Figure 4 As in the container 130 of FIG. 1 , a spacer 138 that defines the position where the pressing surface 21A of the pressing portion 21 descends may be provided.

[0045] (3) If Figure 4 The restriction part 137 for restricting the undecomposed polyurethane foam from flowing out of the discharge port 35 may be formed by a screen, as in the container 130 of FIG. The screen may be configured to prevent the undecomposed polyurethane foam from passing through but allow the liquid to pass through. In addition, instead of providing the restriction part, the discharge of the undecomposed polyurethane foam may be suppressed by making the diameter of the discharge port smaller than the polyurethane foam.

[0046] (4) The shape of the container can be changed appropriately. For example, the bottom wall is not limited to a flat plate, and can be provided with protrusions or depressions to improve heat transfer. Figure 4 The decomposing agent introduction part 125 may be configured such that the decomposing agent 13 is introduced from the introduction port 36, as in the container 130 of FIG.

[0047] (5) As the heating portion, a heat source such as a tape heater in contact with the side wall portion may be further provided.

[0048] The present disclosure is not limited to the embodiments described in detail above, and various modifications and changes can be made.

[0049] Description of Reference Numerals 10: liquid, 11: Polyurethane foam, 13: Decomposer, 15: Polyols, 16: Amine components, 20: Decomposition and processing device, 21: Pressing part, 21A: Pressing surface, 23: Heating unit, 25, 125: Decomposition agent input part, 30,130:Container, 31: Detention Department, 33: Bottom wall part, 33A: inner bottom surface, 34: Side wall, 35: Exhaust port, 36: Input port, 37: Restriction Department, 40: Recycling containers, 138: Spacer.

Claims

1. A polyurethane foam decomposition treatment device, wherein: have: Container, containing polyurethane foam and disintegrator, a pressing part for pressing the polyurethane foam in the container, and A heating unit for heating the inside of the container; The container has a retention portion for retaining a liquid substance containing the decomposition product of the polyurethane foam and the decomposition agent. The pressing portion is configured to press the polyurethane foam downward to push the polyurethane foam into the liquid substance in the stagnation portion.

2. The polyurethane foam decomposition treatment device according to claim 1, wherein: A discharge port for the liquid substance is formed at a position higher than the inner bottom surface of the container. A portion of the container that is lower than the lower end of the discharge port is the stagnation portion.

3. A method for decomposing polyurethane foam, wherein: Add polyurethane foam and decomposition agent into the container. heating the container containing the polyurethane foam and the decomposing agent, allowing a liquid containing the decomposition product of the polyurethane foam and the decomposition agent to remain in the container, The undecomposed polyurethane foam is pressed downward to be pressed into the retained liquid.

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