Waste tire determination method, recycled material manufacturing method, and tire manufacturing method

Abstract

The recycled material manufacturing method comprises: a step S11 of acquiring tire information relating to a waste tire (200); steps S12-S17: determining, on the basis of the tire information acquired in step S11, whether or not a part or all of the waste tire (200) is suitable for a raw material of a predetermined recycled material; and a first manufacturing step in which the recycled material is manufactured using a portion or all of the waste tire (200) determined by steps S12-S17 to be suitable for the raw material of the recycled material.

Description

Technical Field

[0001] The present disclosure relates to a waste tire identification method, a recycled material manufacturing method, and a tire manufacturing method. Background Art

[0002] Generally, a technology for recycling waste tires is known. For example, a technology for recycling the waste tires as retreaded tires by replacing the tread portions of the waste tires is known (for example, see Patent Document 1). In addition, a technology for producing recycled materials such as rubber powder using the waste tires as raw materials is known. [Prior art literature] [Patent Document]

[0003] Patent Document 1: Japanese Patent Application Publication No. 2017-196917 Summary of the invention [Problems to be solved by the invention]

[0004] In other words, the waste tires that become the raw materials of the recycled materials include various types of waste tires. For example, the waste tires that become the raw materials of the recycled materials include the waste tires installed on vehicles such as passenger cars, buses, trucks, motorized two-wheeled vehicles, three-wheeled passenger cars, bicycles with engines, and bicycles. In addition, the waste tires that become the raw materials of the recycled materials include the waste tires that were once all-season tires or studless tires. In addition, the waste tires that become the raw materials of the recycled materials include a variety of waste tires with different markings determined by specifications. In addition, the waste tires that become the raw materials of the recycled materials include a variety of waste tires with different tire material compositions. The tire materials include natural rubber, synthetic rubber, reinforcing materials, and compounding agents. However, in the conventional technology for manufacturing the recycled materials, various types of waste tires were processed together without being distinguished. Therefore, it was difficult to improve the quality of the recycled materials manufactured in the conventional technology.

[0005] The object of the present disclosure is to provide a waste tire identification method, a recycled material manufacturing method, and a tire manufacturing method that can improve the quality of recycled materials. [Methods used to solve the problem]

[0006] The waste tire identification method according to one aspect of the present invention comprises an acquisition step and a determination step. In the acquisition step, tire information related to the waste tire is acquired. In the determination step, based on the tire information acquired by the acquisition step, it is determined whether part or all of the waste tire is suitable for the raw material of the predetermined recycled material.

[0007] According to this method, part or all of the waste tires suitable for the raw materials of the recycled material can be screened out from various types of waste tires. Therefore, the quality of the recycled material manufactured using part or all of the screened waste tires can be improved. [Effects of the Invention]

[0008] According to the present invention, the quality of recycled materials can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] [ Figure 1 ] Figure 1 It is a diagram showing the configuration of a waste tire identification system used in the recycled material production method according to the embodiment of the present invention. [ Figure 2 ] Figure 2 Yes means Figure 1 FIG. 1 is a diagram showing a configuration of a reading unit of a waste tire identification system. [ Figure 3 ] Figure 3 It means in Figure 1 A flowchart of an example of a waste tire identification process executed in the waste tire identification system. [ Figure 4 ] Figure 4 It is a diagram showing another configuration of the waste tire identification system used in the recycled material production method according to the embodiment of the present invention. [ Figure 5 ] Figure 5 Yes means Figure 4 FIG. 1 is a diagram showing the configuration of a conveying section of a waste tire identification system. DETAILED DESCRIPTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that the following embodiments are examples of specific implementation of the present disclosure and do not limit the technical scope of the present disclosure.

[0011] [Recycled materials] First, a recycled material produced by the recycled material production method according to an embodiment of the present disclosure will be described.

[0012] In this specification, the recycled material is defined as tires discarded due to lifespan and damage (waste tires 200 (see Figure 2 )) is used as a material for reuse in new products. The production of such recycled materials is close to the production of new raw materials. Therefore, in the production of the recycled materials, it is important to consider information related to the waste tire 200.

[0013] Specifically, the recycled materials include rubber powder, recycled carbon black, recycled plasticizer, recycled monomers (isoprene, styrene, butadiene, etc.), recycled polymers (polymers obtained from recycled monomers), recycled thermoplastic elastomers, recycled steel, and recycled organic fiber materials. In addition, the recycled materials do not include materials obtained from waste tires 200 without undergoing the above-mentioned decomposition and purification processes. For example, the recycled materials do not include materials obtained by cutting off unnecessary parts from waste tires 200, such as base tires for retreading.

[0014] Here, the rubber powder is a cross-linked rubber product that is crushed into a granular or powdery form. The rubber powder is added when a new rubber composition is manufactured. In the recycled material manufacturing method according to the embodiment of the present disclosure, two types of rubber powders are manufactured: rubber powder for tread compounding and rubber powder for non-tread compounding. The rubber powder for tread compounding is a rubber powder that is intended to be used in the manufacture of the tread portion of a tire. The rubber powder for non-tread compounding is a rubber powder that is intended to be used in the manufacture of a component different from the tread portion of a tire.

[0015] In addition, the regenerated carbon black is a substance obtained by recycling the carbon black contained in the waste tire 200 through thermal decomposition or other treatment. The regenerated carbon black is added when a new rubber composition or plastic product is manufactured. The regenerated carbon black can be used for reinforcing materials or coloring products according to its properties.

[0016] In addition, the recycled plasticizer is a substance obtained by extracting the plasticizer contained in the waste tire 200, or a low molecular weight polymer obtained by decomposing the polymer component contained in the waste tire 200. The recycled plasticizer is added when a new rubber composition is manufactured. In addition, the recycled plasticizer can become a material for obtaining a high molecular weight polymer by reacting again.

[0017] The regenerated monomers are various monomers obtained by chemically decomposing polymer components and organic fibers contained in the waste tire 200 by thermal decomposition, hydrolysis, and enzymatic decomposition. The regenerated monomers can be used to obtain high molecular weight polymers and various plasticizers by separation, recovery, and re-reaction.

[0018] The recycled steel is a steel material produced using steel materials recovered from steel-containing products such as tires that have become waste disposal targets due to deterioration, wear, damage, etc. The recycled organic fiber material is an organic fiber material produced using organic fiber materials recovered from organic fiber-containing products such as tires that have become waste disposal targets as a raw material.

[0019] In addition, the recycled thermoplastic elastomer is a polymer having a hard segment and a soft segment, and is a substance that forms pseudocrosslinking points through the van der Waals force of the hard segment to exert the elasticity of the elastomer. The recycled thermoplastic elastomer is a substance obtained by separating the thermoplastic elastomer contained in the waste tire 200. The recycled thermoplastic elastomer can be formed into a new product by remelting and injection molding.

[0020] It should be noted that the recycled material may contain recycled rubber. The recycled rubber is rubber that is given adhesiveness and plasticity again by applying heat, pressure and physical treatment to part or all of the waste tire 200. The recycled rubber can be used for tires for vehicles, industrial rubber products such as belts and hoses, pads, shoes, soles, rubber cloth, etc.

[0021] In addition, the recycled material may be a material different from the rubber powder, the recycled carbon black, the recycled plasticizer, the recycled thermoplastic elastomer, and the recycled rubber. In addition, the rubber powder may include rubber powder that is intended to be used in the manufacture of an inner liner portion in a tire. In addition, the rubber powder may include non-tire rubber powder used for a purpose different from the manufacture of the tire, or rubber powder whose use is not limited.

[0022] The waste tire 200 is a tire mounted on a vehicle, including tires that have become waste treatment objects due to deterioration, wear, damage, etc. In addition, the waste tire 200 includes tires that do not meet the shipping standards at the manufacturing site and their green tires. For example, the waste tire 200 is a pneumatic tire. For example, the vehicle is a passenger vehicle.

[0023] Preferably, the waste tire 200 is provided with a wireless tag 201 (see Figure 2 ). The wireless tag 201 is disposed in the waste tire 200, closer to the inner side than the outer surface of the waste tire 200. For example, the wireless tag 201 is embedded in the tire when the tire is manufactured before becoming the waste tire 200. It should be noted that the wireless tag 201 can be attached to the inner cavity surface of the tire when the tire is manufactured or sold before becoming the waste tire 200.

[0024] For example, the wireless tag 201 is a so-called passive RFID tag. The wireless tag 201 includes an antenna, a storage unit, and a control unit. The antenna is used for transmitting and receiving signals of data with an external reading device. The storage unit stores tire identification information for identifying the waste tire 200. For example, the tire identification information is a unique code (string) assigned to the waste tire 200. It should be noted that the tire identification information may be a serial number of the wireless tag 201. The control unit sends data including the tire identification information stored in the storage unit to the reading device in response to a request from the external reading device.

[0025] It should be noted that the waste tire 200 is not limited to pneumatic tires. For example, the waste tire 200 may be a non-pneumatic tire such as a so-called solid tire. In addition, the waste tire 200 may be a resin tire using a thermoplastic elastomer. In addition, the vehicle is not limited to a passenger vehicle, as long as it is a mobile body that uses tires to travel. For example, the vehicle may be a passenger car, a truck, a motorized two-wheeled vehicle, a three-wheeled passenger car, a bicycle with a transmitter, or a bicycle.

[0026] In other words, the waste tires 200 used as the raw materials of the recycled materials include various types of waste tires 200. For example, the waste tires 200 used as the raw materials of the recycled materials include various types of waste tires 200 installed on the vehicles. In addition, the waste tires 200 used as the raw materials of the recycled materials include the waste tires that were once all-season tires and studless tires. In addition, the waste tires 200 used as the raw materials of the recycled materials include multiple types of waste tires 200 with different markings determined by specifications. In addition, the waste tires 200 used as the raw materials of the recycled materials include multiple types of waste tires 200 with different tire material compositions.

[0027] For example, the tire material includes polymer components such as thermoplastic elastomer components and rubber components. For example, the thermoplastic elastomer component is a polyurethane thermoplastic elastomer, a polyester thermoplastic elastomer, an olefin thermoplastic elastomer, a vinyl chloride thermoplastic elastomer, a polyamide thermoplastic elastomer, and a fluorine thermoplastic elastomer. For example, the rubber component is a diene rubber component and a non-diene rubber component. For example, the diene rubber component is natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene butadiene rubber (SBR), acrylonitrile butadiene rubber (NBR), chloroprene rubber (CR), and butyl rubber (IIR). In addition, the tire material includes reinforcing materials such as carbon black and silica. Here, the carbon black includes various grades of carbon black such as SAF-HS, SAF, ISAF-HS, ISAF, ISAF-LS, HAF-HS, HAF, HAF-LS, FEF, and GPF. In addition, silica having various specific surface areas can be used according to the required performance. In addition, the tire material includes various compounding agents. For example, the compounding agent is a plasticizer component such as resin and oil, a filler such as calcium carbonate, aluminum hydroxide, talc, and biochar (BIO-CHAR), an antioxidant, a processing aid such as stearic acid, and a fatty acid metal salt, a vulcanizing agent such as sulfur, a vulcanization accelerator, and a accelerator such as zinc oxide.

[0028] However, in the prior art of manufacturing the recycled material, various types of waste tires 200 are processed together without being differentiated. Therefore, it is difficult to improve the quality of the recycled material manufactured in the prior art.

[0029] On the other hand, in the recycled material production method according to the embodiment of the present disclosure, as described below, the quality of the recycled material can be improved.

[0030] [Method for determining waste tires] Next, a waste tire identification method according to an embodiment of the present disclosure will be described.

[0031] The waste tire identification method according to an embodiment of the present disclosure includes an acquisition step, a determination step, and a decision step.

[0032] In the acquisition step, tire information related to the waste tire 200 is acquired.

[0033] In the determination step, based on the tire information acquired in the acquisition step, it is determined whether a part or all of the waste tire 200 is suitable as a raw material for the recycled material.

[0034] In the determination step, it is determined which type of the raw material of the recycled material a part or all of the waste tire 200 is used as based on the determination result of the determination step. In addition, in the determination step, it is determined whether the manufacturing conditions of the recycled material using a part or all of the waste tire 200 or the use conditions of the recycled material manufactured using a part or all of the waste tire 200.

[0035] It should be noted that before executing the waste tire identification method according to the embodiment of the present disclosure, a plurality of waste tires 200 are prepared in advance. Specifically, a plurality of waste tires 200 are brought into the place where the waste tire identification method according to the embodiment of the present disclosure is performed. For each prepared waste tire 200, the acquisition step, the identification step, and the determination step are performed. The introduction of the waste tires 200 is achieved by a person or a conveying machine operated by a person.

[0036] The acquisition step, the determination step and the decision step are performed by Figure 1 The waste tire identification system 100A shown in FIG.

[0037] [Waste Tire Identification System 100A] Here, see Figure 1 and Figure 2 , while explaining the waste tire identification system 100A.

[0038] like Figure 1 As shown, the waste tire identification system 100A includes a waste tire identification device 1 and a server 2 .

[0039] In the waste tire identification system 100A, the waste tire identification device 1 is connected to the server 2 via a communication network such as the Internet or a LAN (Local Area Network) so as to be communicable with each other.

[0040] The waste tire identification device 1 is a device for identifying waste tires 200 (see Figure 2 ) is a device having the function of determining whether the raw material is suitable for the recycled material.

[0041] For example, the waste tire identification device 1 is a fixed information processing device such as a personal computer. It should be noted that the waste tire identification device 1 can be a portable information processing device such as a laptop or a smart phone. In addition, the waste tire identification device 1 is not limited to a general-purpose information processing device, and can be a device dedicated to the above-mentioned identification function.

[0042] like Figure 1 As shown, the waste tire identification device 1 includes a control unit 11 , an operation display unit 12 , a storage unit 13 , a reading unit 14 , and a communication unit 15 .

[0043] The control unit 11 controls the waste tire identification device 1 in a unified manner. Figure 1 As shown, the control unit 11 includes a CPU 21, a ROM 22, and a RAM 23. The CPU 21 is a processor that performs various arithmetic operations. The ROM 22 is a nonvolatile storage device that stores information such as control programs for the CPU 21 to perform various processes in advance. The RAM 23 is a volatile or nonvolatile storage device that is used as a temporary storage memory (work area) for various processes performed by the CPU 21. The CPU 21 executes various control programs pre-stored in the ROM 22. Thus, the CPU 21 controls the waste tire identification device 1 in a unified manner.

[0044] The operation display unit 12 is a user interface of the waste tire identification device 1. The operation display unit 12 includes a display unit and an operation unit. The display unit displays various information according to control instructions from the control unit 11. For example, the display unit is a liquid crystal display. The operation unit inputs various information to the control unit 11 according to user operations. For example, the operation unit is an operation key or a touch panel.

[0045] The storage unit 13 is a nonvolatile storage device, and is, for example, a nonvolatile memory such as a flash memory, an SSD (solid state drive), or an HDD (hard disk drive).

[0046] The storage unit 13 stores in advance information for causing the control unit 11 to Figure 1 The waste tire determination program functions by each processing unit shown in FIG.

[0047] The reader 14 reads the wireless tag 201 (see Figure 2 ) reads the tire identification information (an example of the identification information of the waste tire disclosed in the present invention). Figure 2 As shown, the reading unit 14 is a handheld RFID reader / writer. The reading unit 14 has an antenna that transmits electromagnetic waves of a predetermined specific frequency. Regarding the reading unit 14, when the wireless tag 201 exists within a predetermined communication range, the antenna is used to request the wireless tag 201 to send data, so that the wireless tag 201 sends data including the tire identification information. For example, the specific frequency is a frequency included in the UHF (ultra high frequency) band. In addition, the communication range is about 1 meter. It should be noted that the reading unit 14 is not limited to Figure 2 The handheld RFID reader / writer shown in . For example, the reading unit 14 may be a fixed RFID reader / writer arranged on a line of a series of devices described later.

[0048] The communication unit 15 is a communication interface for performing wired or wireless data communication with an external communication device such as the server 2 via the communication network.

[0049] The server 2 is a computer connected to the waste tire identification device 1 so as to be communicable via the communication network.

[0050] like Figure 1 As shown, the server 2 includes a database 31. Specifically, the database 31 is stored in a storage device provided in the server 2.

[0051] The database 31 includes the tire information. Specifically, the tire information includes material composition information related to the material composition of the waste tire 200. In addition, the tire information includes first grade information and second grade information indicating the grade determined based on the grade system stipulated by the Japan Automobile Tire Association. The first grade information is information indicating the grade of the rolling resistance coefficient of the waste tire 200 when it is in a new state. The second grade information is information indicating the grade of the wet grip performance of the waste tire 200 when it is in a new state. In the database 31, the tire information is associated with the tire identification information and the manufacturing date information indicating the manufacturing date of the waste tire 200. It should be noted that the tire information may include information on the driving history of the tire obtained using a sensor installed inside the tire. Among them, from the perspective of clearly characterizing the waste tire 200 and preventing the complexity of classification, it is preferred that the tire information is information determined before the waste tire 200 leaves the factory. Here, “the time of shipment of the scrap tire 200 ” refers to the time of shipment of the tire from the manufacturing factory before the tire becomes the scrap tire 200 .

[0052] Here, the material composition information includes tire material information, mass information, and component information corresponding to each of the components such as the tread portion, the shoulder portion, the sidewall portion, the bead portion, and the inner liner portion (hereinafter referred to as "waste tire components") contained in the waste tire 200. The tire material information is information indicating the name of each of the tire materials contained in the waste tire components. The mass information is information indicating the mass of each of the tire materials contained in the waste tire components. The component information is information indicating the amount of polymer components, the amount of carbon black components, and the amount of ash in the composition constituting the waste tire components. It should be noted that the amount of polymer components is the total amount of the polymer components, and is the total amount of rubber components and thermoplastic elastomer components. The amount of carbon black components is the total amount of carbon black contained in the composition constituting the waste tire components. The ash content is the amount of components (ash) remaining when the composition of silicon dioxide, zinc oxide, aluminum hydroxide, etc. contained in the composition constituting the waste tire components is heated or burned at 750°C.

[0053] Here, the method for obtaining the polymer component amount, carbon black component amount and ash content in the composition constituting the waste tire component is described. First, according to JIS-K6229, a test piece is immersed in acetone for 72 hours to extract the soluble components, and the mass of each test piece before and after the extraction is measured, and the acetone extractable component amount is calculated by the following formula (1).

[0054] Acetone extract component amount (%) = {(mass of the test piece before extraction - mass of the test piece after extraction) / (mass of the test piece before extraction)} × 100 (1)

[0055] Next, for the sample remaining after the acetone extraction, according to JIS-K6226-1:2003, the mass (%) of the components reduced when the organic matter is thermally decomposed and gasified is obtained from room temperature to 750°C in a nitrogen atmosphere as the polymer component amount. Next, the mass (%) of the components reduced when it is oxidized and burned by heating in air is obtained as the carbon amount. Then, the mass (%) of the unburned component (ash) is obtained as the ash content. According to the above, the total of each amount is 100% by mass.

[0056] In addition, the material composition information may include information related to the reinforcing material of the carcass layer, the reinforcing material of the belt layer, the reinforcing material of the belt reinforcing layer, the reinforcing material of the steel filler layer, and the organic fiber material and steel material used in the bead core, etc. For example, the information related to the organic fiber material includes the name of the material forming the organic fiber material, the fineness, the twist, and the wire diameter, etc. In addition, the information related to the steel material includes the grade of the steel forming the steel material, the element ratio, and the composition of the plating layer, etc.

[0057] The server 2 transmits the data stored in the database 31 to the waste tire identification device 1 according to the request from the waste tire identification device 1. Specifically, the server 2, when receiving the data transmission request including the tire identification information, retrieves the tire information and the manufacturing date information associated with the tire identification information from the database 31. Then, the server 2 transmits the data including the tire information and the manufacturing date information obtained by the retrieval to the waste tire identification device 1.

[0058] It should be noted that the database 31 may be stored in the storage unit 13. In this case, the waste tire identification system 100A may not include the server 2. In addition, part or all of the tire information may be pre-stored in the storage unit of the wireless tag 201 installed in the waste tire 200.

[0059] like Figure 1As shown, the control unit 11 includes an acquisition processing unit 41 , a determination processing unit 42 , a decision processing unit 43 , and an output processing unit 44 .

[0060] Specifically, the control unit 11 functions as the acquisition processing unit 41, the determination processing unit 42, the determination processing unit 43, and the output processing unit 44 by executing the waste tire determination program stored in the storage unit 13. It should be noted that a part or all of the processing units included in the control unit 11 may be composed of electronic circuits. In addition, the waste tire determination program may be a program for causing a plurality of processors to function as the processing units included in the control unit 11.

[0061] The acquisition processing unit 41 acquires the tire information.

[0062] Specifically, the acquisition processing unit 41 acquires the tire information and the manufacturing date information based on the tire identification information read from the wireless tag 201 .

[0063] For example, when the acquisition processing unit 41 reads the tire identification information of the waste tire 200 from the wireless tag 201 through the reading unit 14, the data transmission request including the tire identification information is sent to the server 2. Then, the acquisition processing unit 41 receives data including the tire information and the manufacturing date information sent from the server 2 in response to the data transmission request. Then, the acquisition processing unit 41 acquires the tire information and the manufacturing date information from the data received from the server 2.

[0064] It should be noted that the acquisition processing unit 41 can acquire the tire information and the manufacturing date information based on the outer surface information recorded on the outer surface of the waste tire 200. For example, the outer surface information is a one-dimensional barcode attached to the side of the tire when the tire is manufactured before becoming the waste tire 200, display information such as size and pattern set on the sidewall of the tire, and a two-dimensional barcode engraved on the sidewall. In this case, the waste tire identification device 1 only needs to have a camera that can capture the outer surface information instead of the reading unit 14. In addition, the acquisition processing unit 41 extracts the tire identification information from the captured image of the outer surface information acquired by the camera, and acquires the tire information and the manufacturing date information based on the extracted tire identification information. In addition, the acquisition processing unit 41 can directly acquire the tire information and the manufacturing date information from the captured image of the outer surface information acquired by the camera. It should be noted that it is considered that, depending on the driving history and specification conditions of the waste tire 200, it is difficult to acquire information based on the captured image due to contamination or friction of the outer surface. Therefore, it is preferred that the acquisition processing unit 41 reads the tire identification information of the waste tire 200 from the wireless tag 201. Moreover, it is more preferred that the acquisition processing unit 41 reads the tire identification information from both the wireless tag 201 and the outer surface of the waste tire 200. For example, when the tire identification information read from the wireless tag 201 and the tire identification information read from the outer surface of the waste tire 200 are inconsistent, the acquisition processing unit 41 calculates the consistency rate of the two tire identification information read. Furthermore, when the calculated consistency rate is equal to or greater than a predetermined reference value, the acquisition processing unit 41 determines that there is an information reading error caused by contamination of the outer surface of the waste tire 200, and determines that the tire identification information read from the wireless tag 201 is correct. Furthermore, when the calculated consistency rate is less than the reference value, the acquisition processing unit 41 determines that there is a problem in the wireless tag 201, and determines that the tire identification information read from the outer surface of the waste tire 200 is correct. For example, as a case where there is a problem in the wireless tag 201, it can be considered that there is an information input error when registering the tire identification information in the wireless tag 201. In addition, as a case where there is a problem in the wireless tag 201, it can be considered that another wireless tag 201 different from the predetermined wireless tag 201 originally installed in the waste tire 200 is installed in the waste tire 200.

[0065] In addition, the tire information and the manufacturing date information may be pre-written in the wireless tag 201. In this case, the acquisition processing unit 41 may directly acquire the tire information and the manufacturing date information from the wireless tag 201.

[0066] The determination processing unit 42 determines whether a part or all of the waste tire 200 is suitable as a raw material of the recycled material based on the tire information acquired by the acquisition processing unit 41 .

[0067] Specifically, the determination processing unit 42 determines whether a part or all of the waste tire 200 is suitable as the raw material of the recycled material based on the material composition information acquired by the acquisition processing unit 41 .

[0068] For example, the determination processing unit 42 determines, based on the material composition information acquired by the acquisition processing unit 41, for each of the waste tire components included in the waste tire 200, which of the recycled thermoplastic elastomer and the recycled plasticizer the waste tire component is suitable for.

[0069] In addition, the determination processing unit 42 determines whether the waste tire component contained in each waste tire 200 is suitable as a raw material for the rubber powder for tread compounding based on the material composition information and the manufacturing date information acquired by the acquisition processing unit 41.

[0070] In addition, the determination processing unit 42 determines whether the waste tire component contained in each waste tire 200 is suitable as a raw material for the non-tread compounding rubber powder based on the material composition information and the manufacturing date information acquired by the acquisition processing unit 41.

[0071] In addition, the determination processing unit 42 determines whether the waste tire component included in each waste tire 200 is suitable as a raw material for the regenerated carbon black based on the material composition information acquired by the acquisition processing unit 41 .

[0072] In addition, the determination processing unit 42 determines whether the waste tire component included in each waste tire 200 is suitable as a raw material of the recycled monomer based on the material composition information acquired by the acquisition processing unit 41 .

[0073] For example, the determination processing unit 42 determines whether the ratio of the thermoplastic elastomer contained in 100% by mass of the polymer component is greater than 50% by mass for the composition forming the waste tire component based on the material composition information acquired by the acquisition processing unit 41. Here, when the determination processing unit 42 determines that the thermoplastic elastomer is greater than 50% by mass, it is determined that the composition is a thermoplastic elastomer composition. In this case, the determination processing unit 42 determines that the waste tire component formed by the thermoplastic elastomer composition is suitable for the raw material of the recycled thermoplastic elastomer. In addition, when the determination processing unit 42 determines that the thermoplastic elastomer is less than 50% by mass, it is determined that the composition is a rubber composition. In this case, the determination processing unit 42 determines that the waste tire component formed by the rubber composition is suitable for the raw material of the recycled plasticizer. It should be noted that, when the determination processing unit 42 determines that the waste tire component is suitable for the raw material of the recycled thermoplastic elastomer, the type of the main component thermoplastic elastomer contained in the waste tire component can be determined based on the material composition information. In this case, it is sufficient if the waste tire components that are determined to be suitable as raw materials for the recycled thermoplastic elastomer are classified according to the type. In addition, regarding the determination processing unit 42, when it is determined that the waste tire components are suitable as raw materials for the recycled plasticizer, it is possible to determine which of a plurality of predetermined ratio ranges the composition ratio of the rubber component contained in the waste tire components corresponds to based on the material composition information. In this case, it is sufficient if the waste tire components that are determined to be suitable as raw materials for the recycled plasticizer are classified according to the ratio range. In addition, the determination criteria for which of the recycled materials, the recycled thermoplastic elastomer and the recycled plasticizer, the waste tire components are suitable as raw materials are not limited to the above-mentioned determination criteria.

[0074] In addition, the determination processing unit 42 determines whether the waste tire component formed by the rubber composition satisfies both the condition that the time elapsed from the time of manufacture is less than 5 years and the condition that the proportion of butyl rubber (IIR) contained in 100% by mass of the rubber component is less than 5% by mass, based on the material composition information and the manufacturing date information acquired by the acquisition processing unit 41. And, with respect to the determination processing unit 42, when it is determined that both conditions are satisfied, it is determined that the waste tire component is suitable for the raw material of the rubber powder for tread compounding. In addition, with respect to the determination processing unit 42, when it is determined that either or both of the two conditions are not satisfied, it is determined that the waste tire component is not suitable for the raw material of the rubber powder for tread compounding. Here, the tread portion in the tire is a component that contacts the road surface. If the degradation of the polymer component in the manufactured rubber powder for tread compounding is aggravated, there is a concern that the performance of the tire manufactured using the rubber powder for tread compounding is impaired. Therefore, for the waste tire component formed by the rubber composition, when the time from the time of manufacture is more than 5 years, it is determined that the waste tire component is not suitable for the raw material of the rubber powder for tread compounding. In addition, butyl rubber lacks adhesion with other rubber components. If the amount contained in the tread portion of the tire is large, there is a concern that it will cause early wear and the like. Therefore, for the waste tire component formed by the rubber composition, when the proportion of butyl rubber (IIR) contained in 100% by mass of the rubber component is more than 5% by mass, it is determined that the waste tire component is not suitable for the raw material of the rubber powder for tread compounding. That is, by using the waste tire component that meets both of the above two conditions to manufacture the rubber powder for tread compounding, the quality of the manufactured rubber powder for tread compounding can be improved. It should be noted that, regarding the determination processing unit 42, when it is determined that the waste tire component is suitable for the raw material of the rubber powder for tread compounding, it can be determined based on the first grade information and the second grade information to which of the different multiple groups the combination of the grade of the rolling resistance coefficient of the tire and the grade of the wet grip performance of the tire of the waste tire component belongs. In this case, it is sufficient to classify the waste tire component that is determined to be suitable for the raw material of the rubber powder for tread compounding according to the group. In this way, the quality of the manufactured rubber powder for tread compounding can be further improved. In addition, the determination criteria for whether the waste tire component is suitable for the raw material of the rubber powder for tread compounding is not limited to the above-mentioned determination criteria.

[0075] In addition, the determination processing unit 42 determines whether the waste tire component formed of the rubber composition satisfies both the condition that the time elapsed from the time of manufacture is more than 5 years and less than 10 years, and the condition that the ratio of butyl rubber (IIR) contained in 100% by mass of the rubber component is more than 5% by mass and less than 10% by mass, based on the material composition information and the manufacturing date information acquired by the acquisition processing unit 41. And, the determination processing unit 42 determines that the waste tire component is suitable for the raw material of the rubber powder for non-tread compounding when it is determined that both conditions are satisfied. In addition, the determination processing unit 42 determines that the waste tire component is not suitable for the raw material of the rubber powder for non-tread compounding when it is determined that either or both of the two conditions are not satisfied. It should be noted that, regarding the determination processing unit 42, when it is determined that the waste tire component is suitable for the raw material of the rubber powder for non-tread compounding, it can be determined based on the first grade information and the second grade information to which of the multiple groups with different combinations of the grade of the rolling resistance coefficient of the tire and the grade of the wet grip performance of the tire the waste tire component belongs. In this case, it is sufficient to classify the waste tire component determined to be suitable for the raw material of the rubber powder for non-tread compounding according to the group. Thereby, the quality of the manufactured rubber powder for non-tread compounding can be further improved. In addition, the determination criteria of whether the waste tire component is suitable for the raw material of the rubber powder for non-tread compounding is not limited to the above-mentioned determination criteria.

[0076] In addition, the determination processing unit 42 determines whether the proportion of the ash contained in the rubber composition is less than 10% by mass for the waste tire component formed by the rubber composition based on the material composition information obtained by the acquisition processing unit 41. Here, with respect to the determination processing unit 42, when it is determined that the proportion of the ash is less than 10% by mass, it is determined that the waste tire component is suitable for the raw material of the regenerated carbon black. In addition, with respect to the determination processing unit 42, when it is determined that the proportion of the ash is more than 10% by mass, it is determined that the waste tire component is not suitable for the raw material of the regenerated carbon black. Here, the ash is difficult to remove as an impurity in the process of manufacturing the regenerated carbon black using the waste tire component. That is, by using the waste tire component with a small amount of ash to manufacture the regenerated carbon black, the quality of the manufactured regenerated carbon black can be improved. In addition, it can be considered that the components of the raw materials of the regenerated carbon black are different from polymers, etc., and are not easily affected by deterioration caused by the passage of time. Therefore, in the process of determining whether the waste tire component formed by the rubber composition is suitable for the raw material of the regenerated carbon black, the time elapsed from the time of manufacture is not taken into account. It should be noted that, regarding the determination processing unit 42, when it is determined that the waste tire component is suitable for the raw material of the regenerated carbon black, the grade of the carbon black with the highest blending ratio among the carbon black contained in the waste tire component can be determined based on the material composition information. In this case, it is sufficient to classify the waste tire component determined to be the raw material of the regenerated carbon black according to the grade. Thereby, the quality of the manufactured regenerated carbon black can be further improved. In addition, the determination criteria for whether the waste tire component is suitable for the raw material of the regenerated carbon black is not limited to the above-mentioned determination criteria.

[0077] Here, the determination processing unit 42 can classify the waste tire components that are determined to be suitable for the raw materials of the regenerated carbon black based on the composition ratio of the polymer components and the composition ratio of the plasticizer contained in the material composition information obtained by the acquisition processing unit 41. By classifying in this way, the monomer types of the monomer components obtained in the process of thermally decomposing the waste tire components in the manufacturing process of the regenerated carbon black can be limited. Therefore, the quality of the regenerated monomer manufactured from the monomer components can be improved without performing the classification operation of the monomer components obtained in the process of thermally decomposing the waste tire components. It should be noted that a determination criterion for whether the waste tire components are suitable for the raw materials of the regenerated monomer can be set separately.

[0078] It should be noted that the determination processing unit 42 can determine which raw material of the plurality of tread compounding rubber powders having different performances is suitable for the tread portion of the waste tire 200 based on the first level information and the second level information acquired by the acquisition processing unit 41. In this case, all of the waste tire components different from the tread portion in the waste tire 200 can be used as raw materials for the non-tread portion compounding rubber powder. In this way, it is also possible to determine whether a part or all of the waste tire 200 is suitable as the raw material of the recycled material based on information other than the material composition information included in the tire information, but from the perspective of improving the quality of the manufactured recycled material, it is preferred to perform the determination based on the material composition information.

[0079] In addition, the determination processing unit 42 can perform determination on the non-elastic components included in the waste tire 200 based on the material composition information and the manufacturing date information acquired by the acquisition processing unit 41. Here, the non-elastic components include the steel material and the organic fiber material.

[0080] For example, the determination processing unit 42 can determine the grade of the steel material contained in the waste tire 200 based on the carbon element content of the steel contained in the material composition information acquired by the acquisition processing unit 41. Thus, when the recycled steel is manufactured using the steel material of the same grade, the carbon element content in the manufactured recycled steel can be made uniform. Therefore, the quality of the manufactured recycled steel can be improved.

[0081] In addition, the determination processing unit 42 may determine whether the regeneration method of the organic fiber material contained in the waste tire 200 is suitable for chemical recycling or mechanical recycling based on the manufacturing date information acquired by the acquisition processing unit 41. For example, the determination processing unit 42 determines that the regeneration method suitable for the organic fiber material contained in the waste tire 200 is the mechanical recycling when the time elapsed from the manufacturing of the waste tire 200 is less than 5 years. In this case, the determination processing unit 42 may classify the organic fiber material contained in the waste tire 200 based on the material type of the organic fiber material contained in the material composition information acquired by the acquisition processing unit 41. In addition, the determination processing unit 42 determines that the regeneration method suitable for the organic fiber material contained in the waste tire 200 is the chemical recycling when the time elapsed from the manufacturing of the waste tire 200 is more than 5 years. In this case, the determination processing unit 42 may classify the organic fiber material contained in the waste tire 200 based on the material type of the organic fiber material contained in the material composition information acquired by the acquisition processing unit 41.

[0082] Here, the mechanical recycling refers to a recycling method of obtaining the same type of the recycled materials by crushing, melting, etc. the components of the waste tires. In addition, the chemical recycling refers to a recycling method of obtaining the same type or different types of the recycled materials by chemically decomposing the components of the waste tires once by the action of heat or enzymes.

[0083] The determination processing unit 43 determines, based on the determination result of the determination processing unit 42 , which of the above-mentioned recycled materials a part or all of the waste tire 200 is to be used as.

[0084] Specifically, when the determination processing unit 42 determines that the waste tire component is suitable as a raw material for one of the recycled materials, the determination processing unit 43 determines that the waste tire component is a raw material for the one of the recycled materials.

[0085] In addition, when the determination processing unit 42 determines that the waste tire component is suitable as a raw material for a plurality of the recycled materials, the determination processing unit 43 determines which of the recycled materials the waste tire component is to be used as a raw material according to a priority order predetermined among the plurality of the recycled materials.

[0086] In addition, regarding the decision processing unit 43, when the total weight of the waste tire components determined as the raw material of the recycled material with the highest priority reaches a multiple of the amount (weight) of the raw material required for the production of the recycled material, the priority of the recycled material is changed to the lowest. Thus, when it is determined that the waste tire components are suitable as raw materials for multiple types of recycled materials, it can be determined which type of recycled material the waste tire components are used as raw materials, so that there will be no excess or shortage in the raw materials of the recycled material.

[0087] It should be noted that the decision processing unit 43 may not automatically change the priority order specified among the plurality of the recycled materials. In addition, the decision processing unit 43 may change the priority order specified among the plurality of the recycled materials according to a predetermined user operation. In addition, the decision processing unit 43 may decide to use the waste tire component as a randomly selected raw material among the plurality of the recycled materials when the determination processing unit 42 determines that the waste tire component is suitable as a raw material of the plurality of the recycled materials.

[0088] Here, when the determination processing unit 43 determines that the waste tire components are used as the raw material of the recycled thermoplastic elastomer, the determination processing unit 43 determines the reuse conditions of the recycled thermoplastic elastomer produced using the waste tire components based on the material composition information.

[0089] For example, the recycling condition of the recycled thermoplastic elastomer is the maximum compounding ratio when the recycled thermoplastic elastomer is used in a new product.

[0090] For example, the blending ratio (mass %) when the recycled thermoplastic elastomer is reused, the content E (mass %) of the recycled thermoplastic elastomer in the thermoplastic elastomer composition forming the waste tire component, and the number of years Y (years) since the production of the oldest recycled thermoplastic elastomer among the recycled thermoplastic elastomers contained in the thermoplastic elastomer composition preferably satisfy the following relational expression (2). It should be noted that the content E and the number of years Y only need to be included in the material composition information.

[0091] Compounding ratio (mass %) ≤ 50 - 0.1 × E × Y ··· (2)

[0092] For example, in the determination processing section 43, when the thermoplastic elastomer composition forming the waste tire component does not contain the recycled thermoplastic elastomer as a thermoplastic elastomer component, it is determined that when the recycled thermoplastic elastomer is used, up to 50% by mass can be used as a thermoplastic elastomer according to the relational expression (2). In addition, in the determination processing section 43, when the thermoplastic elastomer composition contains 50% by mass of the recycled thermoplastic elastomer as a thermoplastic elastomer component and the number of years that have passed since the production of the oldest recycled thermoplastic elastomer among the recycled thermoplastic elastomers contained in the thermoplastic elastomer composition is 4 years, it is determined that when the recycled thermoplastic elastomer is used, up to 30% by mass can be used as a thermoplastic elastomer according to the relational expression (2).

[0093] It should be noted that when the compounding ratio calculated according to the relational expression (2) is 0 or a negative value, it is not suitable for use in mechanical recycling, so it is preferably thermally recycled or cascade recycled as a raw material of plastic. In addition, the processing for determining the reuse conditions of the regenerated thermoplastic elastomer can be performed by a processing unit different from the determining processing unit 43, or by a person.

[0094] Furthermore, when the determination processing unit 43 determines that the waste tire component is to be used as a raw material of the recycled plasticizer, the determination processing unit 43 determines the production conditions of the recycled plasticizer based on the material composition information.

[0095] For example, the production condition of the recycled plasticizer is the thermal decomposition temperature in the step of thermally decomposing the waste tire component determined to be suitable as a raw material for the recycled plasticizer.

[0096] For example, preferably, the ratio R1 of the diene rubber component in the polymer component and the thermal decomposition temperature T1 (°C) in the production of the recycled plasticizer satisfy the following relationship (3). This is because the higher the ratio of the diene rubber component in the polymer component, the higher the possibility of recombination by free radicals generated during thermal decomposition becomes, and in order to suppress the recombination, the thermal decomposition temperature needs to be lowered.

[0097] R1 × T1 ≤ 300 ··· (3)

[0098] For example, in the determination processing unit 43, when the ratio of the diene rubber component in the polymer component of the rubber composition forming the waste tire component is 0.8, the maximum thermal decomposition temperature is determined to be 375° C. according to the relational expression (3). In addition, in the determination processing unit 43, when the ratio of the diene rubber component in the polymer component of the rubber composition is 1.0, the maximum thermal decomposition temperature is determined to be 300° C. according to the relational expression (3).

[0099] It should be noted that, in the case where the plurality of waste tire components are collectively thermally decomposed, the ratio of the diene rubber component in the polymer component to be substituted into the relational expression (3) is calculated based on the amount of the polymer component contained in each waste tire component, the ratio of the diene rubber component in the polymer component contained in each waste tire component, and the weight of each waste tire component. Specifically, in the case where the amount of the polymer component in the waste tire component (i) is P i (mass %), the ratio of the diene rubber component contained in the polymer component is D i (mass %), the weight of the waste tire component (i) is W i (g), through (∑P i ×D i ×W i ×100) / ∑W i , and the ratio of the diene rubber component in the polymer component is calculated by substituting it into the relational expression (3). In addition, the process of determining the production conditions of the regenerated plasticizer may be performed by a processing unit different from the determination processing unit 43, or by a person.

[0100] Furthermore, when it is determined that the waste tire components are to be used as raw materials for the rubber powder for tread compounding or the rubber powder for non-tread compounding, the determination processing unit 43 determines the manufacturing conditions of the rubber powder for tread compounding or the rubber powder for non-tread compounding based on the material composition information.

[0101] For example, the production condition of the rubber powder for tread compounding or the rubber powder for non-tread compounding is the atmospheric temperature in the step of pulverizing the waste tire component determined to be a suitable raw material for the rubber powder for tread compounding or the rubber powder for non-tread compounding.

[0102] For example, preferably, the atmospheric temperature T2 (°C) during the pulverization of the waste tire component and the ratio R2 (mass %) of the carbon black content in the rubber composition forming the waste tire component satisfy the following relational expression (4). This is because the rubber composition generates heat due to the mechanical force applied by the pulverizer when being pulverized, and sometimes the rubber composition becomes plasticized due to the heat and cannot be pulverized. However, the greater the content of carbon black in the rubber composition, the easier it is to undergo plasticization due to the heat.

[0103] T2 ≤ 50 - R2 × 0.5 ··· (4)

[0104] For example, in the determination processing section 43, when the content ratio of carbon black in the rubber composition forming the waste tire component is 10 mass %, the maximum atmosphere temperature during pulverization is determined to be 45° C. or less according to the relational expression (4). In addition, in the determination processing section 43, when the content ratio of carbon black in the rubber composition is 40 mass %, the maximum atmosphere temperature during pulverization is determined to be 30° C. or less according to the relational expression (4).

[0105] In addition, from the perspective of further improving the pulverization efficiency, it is more preferred that the atmospheric temperature T2 (° C.) during pulverization of the waste tire component and the ratio R2 (mass %) of the carbon black content in the rubber composition forming the waste tire component satisfy the following relationship (5).

[0106] T2 ≤ 25-R2 × 0.5 ··· (5)

[0107] It should be noted that, in the case where a plurality of the waste tire components are collectively crushed, the ratio of the carbon black content to be substituted into the relational expression (4) or (5) can be calculated based on the ratio of the carbon black content contained in each waste tire component and the weight of each waste tire component. Specifically, in the case where the ratio of the carbon black content contained in the rubber component of the waste tire component (i) is C i The weight of the waste tire component (i) is W i When (∑C i ×W i ) / ∑W i, calculate the carbon black content ratio substituted into the relational expression (4) or (5). In addition, the process of determining the manufacturing conditions of the rubber powder for tread compounding or the rubber powder for non-tread compounding can be performed by a processing unit different from the determination processing unit 43, or by a person.

[0108] Furthermore, when the determination processing unit 43 determines that the waste tire component is to be used as the raw material of the regenerated carbon black, the determination processing unit 43 determines the production conditions of the regenerated carbon black based on the material composition information.

[0109] For example, the production condition of the regenerated carbon black is the thermal decomposition temperature in the step of thermally decomposing the waste tire component determined to be suitable as a raw material for the regenerated carbon black.

[0110] For example, preferably, the ratio R3 (mass %) of the thermal decomposition temperature T3 (°C) and the content of carbon black in the rubber composition forming the waste tire component satisfies the following relationship (6). This is because carbon black is a material with high thermal conductivity in the rubber composition, and the lower its content ratio, the lower the heat conduction in the thermal decomposition process, and the lower the manufacturing efficiency of the regenerated carbon black.

[0111] T3≥600-R3×2.5···(6)

[0112] For example, in the determination processing unit 43, when the content ratio of carbon black in the rubber composition forming the waste tire component is 40 mass %, the lowest temperature of the thermal decomposition temperature is determined to be 500° C. according to the relational expression (6). In addition, in the determination processing unit 43, when the content ratio of carbon black in the rubber composition is 20 mass %, the lowest temperature of the thermal decomposition temperature is determined to be 550° C. according to the relational expression (6).

[0113] Here, in the step of thermally decomposing the waste tire component determined as a raw material suitable for the regenerated carbon black, when the thermal decomposition is performed by heating according to microwave irradiation, the thermal decomposition temperature T4 (° C.) and the ratio R4 (mass %) of the carbon black content in the rubber composition forming the waste tire component preferably satisfy the following relationship (7). This is because the mobility of the molecules in the rubber composition can be improved by irradiating with microwaves, and the decomposition can be performed at a lower temperature than the thermal decomposition using a heating method different from microwave irradiation.

[0114] T4≥350-R4×2.5···(7)

[0115] For example, in the case of thermal decomposition by microwave irradiation, when the content of carbon black in the rubber composition forming the waste tire component is 40 mass %, the lowest temperature of the thermal decomposition temperature is determined to be 250° C. according to the relational expression (7). In addition, in the case of thermal decomposition by microwave irradiation by the determination processing unit 43, when the content of carbon black in the rubber composition is 20 mass %, the lowest temperature of the thermal decomposition temperature is determined to be 300° C. according to the relational expression (7).

[0116] It should be noted that the regenerated carbon black may be the carbon black component itself obtained by the thermal decomposition treatment, or may be obtained by surface treating the obtained carbon black component.

[0117] Furthermore, when the determination processing unit 43 determines that the waste tire component is to be used as the raw material of the recycled monomer, the determination processing unit 43 determines the production conditions of the monomer based on the material composition information.

[0118] The regenerated monomer can be obtained by separating and recovering monomer components such as rubber components and plasticizer components generated by the thermal decomposition process included in the manufacturing process of the regenerated carbon black. Therefore, similarly to the case of the regenerated carbon black, the thermal decomposition temperature in the thermal decomposition process of the waste tire component when obtaining the regenerated monomer can be determined so as to satisfy the relationship (6) or (7).

[0119] The production of the regenerated monomer may be performed simultaneously with the production of the regenerated carbon black, or may be performed only for the purpose of obtaining the regenerated monomer.

[0120] It should be noted that, in the case where the plurality of waste tire components are collectively subjected to thermal decomposition, the ratio of the carbon black content to be substituted into the relational expression (6) or the relational expression (7) can be calculated based on the ratio of the carbon black content contained in each waste tire component and the weight of each waste tire component. Specifically, in the case where the ratio of the carbon black content contained in the rubber component of the waste tire component (i) is C i The weight of the waste tire component (i) is W i When (∑C i ×W i ) / ∑W i , and the content ratio of carbon black to be substituted into the relational expression (6) is calculated. In addition, the process of determining the manufacturing conditions of the regenerated carbon black may be performed by a processing unit different from the determination processing unit 43, or by a person.

[0121] Furthermore, when it is determined that the chemical recycling is the appropriate method for regenerating the organic fiber material contained in the waste tire 200, the determination processing unit 43 determines the temperature condition for decomposing the organic fiber material based on the material composition information.

[0122] For example, the organic fiber material can be hydrolyzed using a hydrolase while improving the reaction efficiency. Here, the hydrolysis temperature (°C) and the glass transition temperature (°C) of the organic fiber material preferably satisfy the following relationship (8). In the case where the hydrolysis temperature is near the glass transition temperature of the organic fiber material, the reaction efficiency is improved because the mobility of the molecules forming the organic fiber material is improved. In addition, in the case where the hydrolysis temperature is too high, the hydrolase is inactivated, which in turn impairs the reaction efficiency. Therefore, the hydrolysis temperature is preferably near the glass transition temperature of the organic fiber material.

[0123] The glass transition temperature of the organic fiber material is +30°C ≥ the hydrolysis temperature (°C) ≥ the glass transition temperature of the organic fiber material is -30°C···(8)

[0124] For example, when the glass transition temperature of the organic fiber material forming the waste tire component is 75° C., the determination processing unit 43 determines the hydrolysis temperature to be within the range of 45° C. to 105° C. based on the relational expression (8).

[0125] The output processing unit 44 outputs the decision result of the decision processing unit 43 .

[0126] For example, when the determination processing unit 43 determines that the waste tire component is used as the raw material of the recycled thermoplastic elastomer, the output processing unit 44 displays information indicating that the waste tire component belongs to Group A on the operation display unit 12. In this case, the output processing unit 44 displays information indicating the reuse conditions of the recycled thermoplastic elastomer determined by the determination processing unit 43 on the operation display unit 12.

[0127] In addition, when the determination processing unit 43 determines that the waste tire component is used as the raw material of the recycled plasticizer, the output processing unit 44 displays information indicating that the waste tire component belongs to group B on the operation display unit 12. In this case, the output processing unit 44 displays information indicating the production conditions of the recycled plasticizer determined by the determination processing unit 43 on the operation display unit 12.

[0128] In addition, when the determination processing unit 43 determines that the waste tire component is used as the raw material of the rubber powder for tread compounding, the output processing unit 44 displays information indicating that the waste tire component belongs to Group C on the operation display unit 12. In this case, the output processing unit 44 displays information indicating the manufacturing conditions of the rubber powder for tread compounding determined by the determination processing unit 43 on the operation display unit 12.

[0129] In addition, when the determination processing unit 43 determines that the waste tire component is used as the raw material of the rubber powder for non-tread compounding, the output processing unit 44 displays information indicating that the waste tire component belongs to Group D on the operation display unit 12. In this case, the output processing unit 44 displays information indicating the manufacturing conditions of the rubber powder for non-tread compounding determined by the determination processing unit 43 on the operation display unit 12.

[0130] In addition, regarding the output processing unit 44, when the determination processing unit 43 determines that the waste tire component is used as the raw material of the regenerated carbon black, information indicating that the waste tire component belongs to Group E is displayed on the operation display unit 12. In this case, the output processing unit 44 displays the information indicating the manufacturing conditions of the regenerated carbon black determined by the determination processing unit 43 on the operation display unit 12. In addition, when the regenerated monomer is manufactured simultaneously with the manufacture of the regenerated carbon black, information indicating the expected yield of the monomer component can be displayed on the operation display unit 12.

[0131] In addition, regarding the output processing unit 44, when it is determined that the waste tire component is not suitable for any one of the raw materials of the recycled thermoplastic elastomer, the recycled plasticizer, the rubber powder for tread compounding, the rubber powder for non-tread compounding, and the recycled carbon black, information indicating that the waste tire component belongs to Group F is displayed on the operation display unit 12.

[0132] Furthermore, when the output processing unit 44 manufactures the recycled steel based on the steel material contained in the waste tire 200, if the grade of the steel material is determined by the determination processing unit 42, the grade may be displayed on the operation display unit 12. Furthermore, when the output processing unit 44 manufactures the recycled organic fiber material based on the organic fiber material contained in the waste tire 200, if the organic fiber material is classified by the determination processing unit 42, the classification result may be displayed on the operation display unit 12.

[0133] It should be noted that the output processing unit 44 may output the decision result of the decision processing unit 43 to an external information processing device that is communicably connected to the waste tire identification device 1. For example, the output processing unit 44 may store the decision result of the decision processing unit 43 in a storage device of a server different from the server 2. In addition, the output processing unit 44 may display the decision result of the decision processing unit 43 on a display unit of a predetermined portable terminal.

[0134] [Identification and processing of waste tires] Here, see Figure 3 , an example of the sequence of the waste tire identification process executed by the control unit 11 of the waste tire identification device 1 will be described. Here, steps S11, S12, etc. represent the numbers of the processing sequence (steps) executed by the control unit 11.

[0135] It should be noted that the waste tire determination process is executed when the tire identification information is read from the wireless tag 201 of the waste tire 200 by the reader 14 .

[0136] <Step S11> First, in step S11, the control unit 11 acquires the tire information based on the tire identification information read by the reading unit 14. Here, the process of step S11 is an example of an acquisition step of the present disclosure, and is executed by the acquisition processing unit 41 of the control unit 11.

[0137] Specifically, the control unit 11 transmits the data transmission request including the tire identification information to the server 2. Next, the control unit 11 receives data including the tire information and the manufacturing date information transmitted from the server 2 in response to the transmission of the data transmission request. Then, the control unit 11 acquires the tire information and the manufacturing date information based on the data received from the server 2.

[0138] The following processes from step S12 to step S20 are performed on the waste tire constituent components contained in each waste tire 200 .

[0139] <Step S12> In step S12, the control unit 11 executes a first determination process of determining whether the recycled thermoplastic elastomer or the recycled plasticizer is a suitable raw material for the waste tire component based on the material composition information included in the tire information acquired in the process of step S11.

[0140] Specifically, in the first determination process, when the ratio of the thermoplastic elastomer contained in 100% by mass of the polymer component of the composition forming the waste tire component is greater than 50% by mass, the composition is determined to be a thermoplastic elastomer composition and is suitable as a raw material for the recycled thermoplastic elastomer. In addition, in the first determination process, when the ratio of the thermoplastic elastomer contained in 100% by mass of the polymer component of the composition is less than 50% by mass, the composition is determined to be a rubber composition and is suitable as a raw material for the recycled plasticizer.

[0141] <Step S13> In step S13, the control unit 11 switches the next process to be started according to the result of the first determination process. Specifically, when the control unit 11 determines in the first determination process that the waste tire component is suitable for the raw material of the recycled plasticizer (the "yes" side of S13), the process of step S14 is started. In addition, when the control unit 11 determines in the first determination process that the waste tire component is not suitable for the raw material of the recycled plasticizer, that is, suitable for the raw material of the recycled thermoplastic elastomer (the "no" side of S13), the process of step S18 is started.

[0142] <Step S14> In step S14, the control unit 11 executes a second determination process of determining whether the waste tire component is suitable as a raw material for the rubber powder for tread compounding based on the material composition information and the manufacturing date information acquired in the process of step S11.

[0143] Specifically, in the second determination process, for the waste tire component, if the conditions that the time elapsed from the time of manufacture is less than 5 years and the ratio of butyl rubber (IIR) contained in 100% by mass of the rubber component is less than 5% by mass are both met, the waste tire component is determined to be suitable as a raw material for the rubber powder for tread compounding. In addition, in the second determination process, if the waste tire component does not meet either or both of the two conditions, the waste tire component is determined to be unsuitable as a raw material for the rubber powder for tread compounding.

[0144] <Step S15> In step S15, the control unit 11 switches the next process to be started according to the result of the second determination process. Specifically, when the control unit 11 determines in the second determination process that the waste tire component is suitable for the raw material of the rubber powder for tread compounding (the "yes" side of S15), the process of step S17 is started. In addition, when the control unit 11 determines in the second determination process that the waste tire component is not suitable for the raw material of the rubber powder for tread compounding (the "no" side of S15), the process of step S16 is started.

[0145] <Step S16> In step S16, the control unit 11 performs a third determination process of determining whether the waste tire component is suitable as a raw material for the non-tread compounding rubber powder based on the material composition information and the manufacturing date information acquired in the process of step S11.

[0146] Specifically, in the third determination process, for the waste tire component, if the conditions that the time elapsed from the time of manufacture is more than 5 years and less than 10 years and the ratio of butyl rubber (IIR) contained in 100% by mass of the rubber component is more than 5% by mass and less than 10% by mass are satisfied, the waste tire component is determined to be suitable as a raw material for the rubber powder for non-tread compounding. In addition, in the third determination process, if the waste tire component does not satisfy either or both of the two conditions, the waste tire component is determined to be unsuitable as a raw material for the rubber powder for non-tread compounding.

[0147] <Step S17> In step S17, the control unit 11 performs a fourth determination process of determining whether the waste tire component is suitable as a raw material for the regenerated carbon black based on the material composition information obtained by the process of step S11. Here, the processes of step S12, step S14, step S16, and step S17 are examples of determination steps of the present disclosure, and are performed by the determination processing unit 42 of the control unit 11.

[0148] Specifically, in the fourth determination process, for the waste tire component, when the proportion of the ash content contained in the waste tire component is less than 10% by mass, the waste tire component is determined to be suitable for the raw material of the regenerated carbon black. In addition, in the fourth determination process, for the waste tire component, when the proportion of the ash content contained in the waste tire component is more than 10% by mass, the waste tire component is determined to be unsuitable for the raw material of the regenerated carbon black.

[0149] It should be noted that, the control unit 11 may, after the processing of step S17, perform a process of classifying the waste tire components determined as suitable as the raw material for the regenerated carbon black by the processing of step S17 based on the composition ratio of the polymer components and the composition ratio of the plasticizer contained in the material composition information obtained by the processing of step S11.

[0150] In addition, the control unit 11 may determine the grade of the steel material contained in the waste tire 200 based on the carbon element content of the steel contained in the material composition information obtained by the process of step S11 before the process of step S18. In addition, the control unit 11 may determine whether the regeneration method of the organic fiber material contained in the waste tire 200 is suitable for chemical recycling or mechanical recycling based on the manufacturing date information obtained by the process of step S11 before the process of step S18. In addition, when determining the regeneration method of the organic fiber material, the control unit 11 may classify the organic fiber material based on the material type of the organic fiber material contained in the material composition information obtained by the process of step S11.

[0151] <Step S18> In step S18, the control unit 11 executes a first determination process of determining which of the recycled materials the waste tire component is to be used as a raw material, based on the results of the processes up to step S18.

[0152] Specifically, in the first decision process, when it is determined through the process up to step S18 that the waste tire component is suitable for a raw material of the one recycled material, it is determined that the waste tire component is used as the raw material of the one recycled material. In addition, in the first decision process, when it is determined through the process up to step S18 that the waste tire component is suitable for a raw material of a plurality of recycled materials, it is determined according to the priority order pre-determined among the plurality of recycled materials which recycled material the waste tire component is used as the raw material of. It should be noted that the recycled carbon black and the recycled plasticizer, etc., can be used to simultaneously manufacture two kinds of recycled materials from the same waste tire component by adjusting the manufacturing process. Therefore, when it is determined that the waste tire component is suitable for a raw material of two kinds of recycled materials that can be manufactured simultaneously, it can be determined that the waste tire component is used as the raw material of the two kinds of recycled materials.

[0153] <Step S19> In step S19, the control unit 11 performs a second determination process for determining the reuse conditions of the recycled thermoplastic elastomer or the production conditions of the recycled material based on the material composition information acquired by the process of step S11. Here, the processes of step S18 and step S19 are performed by the determination processing unit 43 of the control unit 11.

[0154] Specifically, when the control unit 11 determines through the first determination process that the waste tire component is to be used as the raw material of the recycled thermoplastic elastomer, the control unit 11 determines the maximum blending ratio when the recycled thermoplastic elastomer manufactured using the waste tire component is used in a new product based on the relational expression (2).

[0155] In addition, the control unit 11, when it is determined through the first determination process that the waste tire component is used as the raw material of the recycled plasticizer, determines the thermal decomposition temperature in the process of thermally decomposing the waste tire component included in the manufacturing process of the recycled plasticizer using the waste tire component according to the relationship (3). In addition, the control unit 11 records the weight of the waste tire component, the amount of polymer components contained in the waste tire component, and the ratio of diene rubber components in the polymer components contained in the waste tire component. The recorded data is used for changing the priority order and calculating the average value when a plurality of the waste tire components are collectively thermally decomposed.

[0156] In addition, when the control unit 11 determines that the waste tire component is used as the raw material of the rubber powder for tread compounding or the rubber powder for non-tread compounding through the first determination process, the control unit 11 determines the atmospheric temperature in the process of crushing the waste tire component included in the manufacturing process of the rubber powder for tread compounding or the rubber powder for non-tread compounding using the waste tire component according to the relational expression (4) or relational expression (5). In addition, the control unit 11 records the weight of the waste tire component and the proportion of the carbon black content contained in the waste tire component. The recorded data is used for changing the priority order and calculating the average value when a plurality of the waste tire components are crushed together.

[0157] In addition, when the control unit 11 determines that the waste tire component is used as the raw material of the regenerated carbon black through the first determination process, the thermal decomposition temperature in the process of thermally decomposing the waste tire component included in the manufacturing process of the regenerated carbon black using the waste tire component is determined according to the relational expression (6) or relational expression (7). In addition, the control unit 11 records the weight of the waste tire component and the proportion of the carbon black content contained in the waste tire component. The recorded data is used for changing the priority order and calculating the average value when a plurality of the waste tire components are thermally decomposed collectively.

[0158] When the control unit 11 determines that the chemical recycling is the appropriate method for regenerating the organic fiber material contained in the waste tire 200 before the processing of step S18, the control unit 11 determines the hydrolysis temperature when the organic fiber material is hydrolyzed according to the relational expression (8).

[0159] <Step S20> In step S20 , the control unit 11 outputs the determination results obtained by the first determination process and the second determination process.

[0160] Specifically, when the control unit 11 determines that the four waste tire components are used as the raw materials of the recycled thermoplastic elastomer through the first determination process, the control unit 11 displays information indicating that the waste tire components belong to the group A on the operation display unit 12. In this case, the control unit 11 displays information indicating the reuse conditions of the recycled thermoplastic elastomer determined through the second determination process on the operation display unit 12.

[0161] In addition, when the control unit 11 determines that the waste tire component is used as the raw material of the recycled plasticizer through the first determination process, the control unit 11 displays information indicating that the waste tire component belongs to the group B on the operation display unit 12. In this case, the control unit 11 displays information indicating the production conditions of the recycled plasticizer determined through the second determination process on the operation display unit 12.

[0162] In addition, when the control unit 11 determines that the waste tire component is used as a raw material for the rubber powder for tread compounding through the first determination process, the control unit 11 displays information indicating that the waste tire component belongs to the group C on the operation display unit 12. In this case, the control unit 11 displays information indicating the manufacturing conditions of the rubber powder for tread compounding determined through the second determination process on the operation display unit 12.

[0163] In addition, when the control unit 11 determines that the waste tire component is used as the raw material of the rubber powder for non-tread compounding through the first determination process, the control unit 11 displays information indicating that the waste tire component belongs to the D group on the operation display unit 12. In this case, the control unit 11 displays information indicating the manufacturing conditions of the rubber powder for non-tread compounding determined through the second determination process on the operation display unit 12.

[0164] In addition, when the control unit 11 determines that the waste tire component is used as the raw material of the regenerated carbon black through the first determination process, the information indicating that the waste tire component belongs to the E group is displayed on the operation display unit 12. In this case, the control unit 11 displays information indicating the production conditions of the regenerated carbon black and the predicted yield of the monomer component determined by the second determination process on the operation display unit 12.

[0165] As described above, the waste tire identification system 100A may perform the acquisition step, the identification step, and the decision step included in the waste tire identification method according to the embodiment of the present disclosure.

[0166] It should be noted that the acquisition step, the determination step and the decision step may be performed by a person.

[0167] [Recycled material production method] Next, a recycled material production method according to an embodiment of the present disclosure will be described.

[0168] The recycled material production method according to the embodiment of the present disclosure includes the steps of the above-mentioned waste tire identification method, the decomposition step, the classification step, and the first production step.

[0169] In the decomposition step, the waste tire 200 is decomposed into a plurality of the waste tire components contained in the waste tire 200 .

[0170] Specifically, in the decomposition step, the waste tire 200 is decomposed into a plurality of the waste tire components contained in the waste tire 200 by cutting the waste tire 200. The decomposition step is performed by a person or a tire cutting machine operated by a person.

[0171] In the classification step, the waste tire components obtained in the decomposition step are classified into any one of a plurality of groups corresponding to a plurality of types of recycled materials based on the determination result in the determination step.

[0172] Specifically, in the classification step, the waste tire components are classified into any one of the group A, the group B, the group C, the group D, the group E, and the group F based on the display content of the process according to the step S20 of the waste tire determination process. The classification step is performed by a person.

[0173] [First manufacturing step] In the first production step, the recycled material is produced using the waste tire constituent components determined as raw materials of the recycled material in the determination step.

[0174] Specifically, in the first manufacturing step, for each of the groups, the waste tire components belonging to the group are used to manufacture the recycled materials corresponding to the group. It should be noted that in the first manufacturing step, preferably, only the waste tire components classified by the classification step are used as raw materials, but other chemicals for improving processability or performance may be added according to the needs of the manufacturing process. In addition, in the first manufacturing step, raw materials other than the waste tires 200 that are determined to be able to be processed simultaneously may be mixed.

[0175] That is, in the first production step, the recycled thermoplastic elastomer is produced using the waste tire components belonging to the group A.

[0176] For example, the recycled thermoplastic elastomer is produced by melting the waste tire components using a twin-screw extruder, etc., and then molding the components into pellets. It should be noted that the method for producing the recycled thermoplastic elastomer is not limited to the above method, and a conventionally known method can be used.

[0177] It should be noted that, preferably, the recycled thermoplastic elastomer produced in the first production step is used according to the reuse condition of the recycled thermoplastic elastomer outputted in the process of step S20 of the waste tire determination process.

[0178] Furthermore, in the first production step, the recycled plasticizer is produced using the waste tire components belonging to the group B.

[0179] The first manufacturing step of manufacturing the regenerated plasticizer includes a first thermal decomposition step, in which a part or all of the waste tire 200 determined to be a raw material suitable for the regenerated plasticizer is thermally decomposed. In addition, the first manufacturing step of manufacturing the regenerated plasticizer includes a first recovery step, in which at least a part of the decomposition product obtained by the first thermal decomposition step is recovered. For example, in the first thermal decomposition step, the waste tire components are heated at a temperature of 150° C. or above using nitrogen-containing compounds such as aniline, nitrobenzene, dinitrobenzene, benzonitrile, phthalonitrile, and nitrobenzonitrile as a reaction solvent. Thus, the rubber composition is decomposed and the regenerated plasticizer is manufactured as a liquefied hydrocarbon. It should be noted that the manufacturing method of the regenerated plasticizer is not limited to the above method, and a conventionally known method can be used.

[0180] Here, in the first manufacturing step of manufacturing the recycled plasticizer, it is preferred that the manufacturing is performed according to the manufacturing conditions of the recycled plasticizer outputted by the processing of the waste tire determination processing step S20. That is, it is preferred that the thermal decomposition temperature in the first thermal decomposition step and the ratio of the diene rubber component in the polymer component in a part or all of the thermally decomposed waste tire 200 satisfy the above-mentioned relational expression (3).

[0181] Furthermore, in the first production step, the rubber powder for tread compounding is produced using the waste tire components belonging to the group C.

[0182] The first manufacturing step of manufacturing the rubber powder for tread compounding includes a crushing step, in which a part or all of the waste tire 200 determined to be a raw material suitable for the rubber powder for tread compounding is crushed. For example, in the crushing step, the waste tire components are put into a crusher such as a roller or a mixer and crushed. The crushed material of the waste tire components obtained by the crushing step is sorted by a sieve mesh to separate the particle size. In this way, the rubber powder for tread compounding is manufactured. It should be noted that the manufacturing method of the rubber powder for tread compounding is not limited to the above method, and previously known methods can be used.

[0183] Here, in the first manufacturing step of manufacturing the rubber powder for tread compounding, it is preferred that the manufacturing is performed according to the manufacturing conditions of the rubber powder for tread compounding outputted by the processing of the waste tire determination processing step S20. That is, it is preferred that the atmosphere temperature during the pulverization in the pulverization step and the ratio of the carbon black content in a part or all of the waste tire 200 satisfy the above-mentioned relational expression (4).

[0184] Furthermore, in the first production step, the rubber powder for non-tread compounding is produced using the waste tire components belonging to the group D.

[0185] For example, the rubber powder for non-tread compounding is produced by the same method as the rubber powder for tread compounding.

[0186] Here, in the first production step of producing the rubber powder for non-tread compounding, it is preferable to produce the rubber powder for non-tread compounding based on the production conditions of the rubber powder for non-tread compounding outputted by the process of step S20 of the waste tire determination process.

[0187] Furthermore, in the first production step, the regenerated carbon black is produced using the waste tire components belonging to the E group.

[0188] The first manufacturing step of manufacturing the regenerated carbon black includes a second thermal decomposition step, in which a part or all of the waste tire 200 determined to be a raw material suitable for the regenerated carbon black is thermally decomposed. In addition, the first manufacturing step of manufacturing the regenerated carbon black includes a second recovery step, in which at least a part of the decomposition product obtained by the second thermal decomposition step is recovered. For example, in the second thermal decomposition step, the waste tire components are burned or irradiated with microwaves to perform thermal decomposition. Then, the regenerated carbon black is manufactured by removing unnecessary substances from the carbide obtained by the second thermal decomposition step. It should be noted that the manufacturing method of the regenerated carbon black is not limited to the above-mentioned method, and previously known methods can be used.

[0189] Here, in the first manufacturing step of manufacturing the regenerated carbon black, it is preferred that the manufacturing is performed according to the manufacturing conditions of the regenerated carbon black outputted by the processing of step S20 of the waste tire determination processing. That is, it is preferred that the thermal decomposition temperature in the second thermal decomposition step of thermal decomposition by combustion and the ratio of the carbon black content in a part or all of the waste tire 200 satisfy the above-mentioned relationship (6). In addition, it is preferred that the thermal decomposition temperature in the second thermal decomposition step of thermal decomposition by microwave irradiation and the ratio of the carbon black content in a part or all of the waste tire 200 satisfy the above-mentioned relationship (7).

[0190] It should be noted that the carbon black component obtained by the thermal decomposition can be used directly as the regenerated carbon black, or can be used as the regenerated carbon black after being subjected to appropriate surface treatment.

[0191] In addition, the regenerated monomer can be obtained by separating and recovering monomer components such as rubber components and plasticizer components generated when manufacturing the regenerated carbon black. The obtained regenerated monomer can be polymerized by a known method and used as a polymer, a plasticizer, and other materials. In addition, thermal decomposition can be performed only for the purpose of obtaining the regenerated monomer under the conditions satisfying the above-mentioned relationship (6) or relationship (7).

[0192] The pyrolysis process can be carried out after the waste tire components are crushed from the perspective of efficiency of operation. In addition, the pyrolysis process can be carried out without crushing the waste tire components.

[0193] It should be noted that in the first manufacturing step, the organic fiber material contained in the waste tire components belonging to each group may be subjected to a hydrolysis treatment for chemical recycling. Preferably, the hydrolysis temperature during the hydrolysis treatment satisfies the above-mentioned relational expression (8). The regenerated monomer of the organic fiber material generated by the chemical recycling may be polymerized again by a known method and spun as the regenerated organic fiber material.

[0194] It should be noted that, when a plurality of types of waste tire components having different manufacturing conditions are included in any one group, the first manufacturing step may be performed for each of the waste tire components having the same manufacturing conditions.

[0195] In addition, in the first manufacturing step, the waste tire components belonging to the F group are used to produce rubber crumbs. The rubber crumbs are used as a raw material for rubber products other than tires, such as rubber pads. For example, the rubber crumbs are produced by crushing the waste tires 200. It should be noted that the waste tire components belonging to the F group can be used as fuel.

[0196] As such, in the method for producing recycled materials according to the embodiment of the present disclosure, it is determined whether the waste tire components are suitable for the raw materials of the recycled materials based on the tire information. Then, the recycled materials are produced using the waste tire components determined to be suitable for the raw materials of the recycled materials. Thus, the recycled materials can be produced using only the waste tire components suitable for the raw materials of the recycled materials. Therefore, compared with the prior art in which various types of waste tires 200 are processed collectively without being differentiated, the quality of the recycled materials can be improved.

[0197] It should be noted that the acquisition step, the determination step, the decision step, and the classification step included in the recycled material production method according to the embodiment of the present disclosure can be Figure 4The waste tire identification system 100B shown in FIG.

[0198] [Waste Tire Identification System 100B] Here, see Figure 4 and Figure 5 , while explaining the waste tire identification system 100B. Here, Figure 5 It is a plan view showing the structure of the transport unit 51 .

[0199] Waste tire identification system 100B has Figure 4 and Figure 5 The waste tire identification system 100B is different from the waste tire identification system 100A in terms of the conveying unit 51 shown in FIG. In addition, the configurations of the control unit 11 and the reading unit 14 of the waste tire identification system 100B are different from those of the waste tire identification system 100A. It should be noted that the waste tire identification system 100A and the waste tire identification system 100B are the same in other aspects. Hereinafter, only the configurations of the waste tire identification system 100B that are different from those of the waste tire identification system 100A will be described.

[0200] The conveying section 51 conveys the waste tires 200 to a plurality of discharge sections 90 (see Figure 5 )

[0201] like Figure 5 As shown, the conveying section 51 includes: a belt conveyor 71, a first guide section 72, a second guide section 73, a third guide section 74, a fourth guide section 75, a fifth guide section 76, a sixth guide section 77, a first movable guide section 78, a second movable guide section 79, a third movable guide section 80, a fourth movable guide section 81 and a fifth movable guide section 82.

[0202] The belt conveyor 71 conveys the waste tire 200 in one direction. Hereinafter, the conveying direction of the waste tire 200 by the belt conveyor 71 is referred to as the conveying direction D1 (see Figure 5 ).

[0203] The first guide portion 72 guides the waste tire 200 conveyed by the belt conveyor 71 to the downstream end of the belt conveyor 71 in the conveying direction D1 to the first discharge portion 91 (see FIG. 1 ) among the plurality of discharge portions 90. Figure 5 ). Specifically, the first discharge portion 91 is disposed below the conveying surface of the waste tire 200 in the belt conveyor 71. In addition, the first discharge portion 91 is disposed separately from the end portion on the downstream side of the conveying direction D1 of the belt conveyor 71 along the conveying direction D1. In addition, the first guide portion 72 is formed to be inclined downward from the end portion on the downstream side of the conveying direction D1 of the belt conveyor 71 toward the first discharge portion 91.

[0204] The second guide portion 73 moves the belt conveyor 71 to the first position P1 (see FIG. 1 ) which is located upstream of the downstream end of the belt conveyor 71 in the conveying direction D1. Figure 5 ) of the waste tire 200 is guided to the second discharge section 92 (see Figure 5 ). Specifically, the second discharge portion 92 is provided on the lower side than the conveying surface of the belt conveyor 71. In addition, the second discharge portion 92 is provided in a direction orthogonal to the conveying direction D1 and separated from the first position P1 of the belt conveyor 71. In addition, the second guide portion 73 is formed to be inclined downward from the first position P1 of the belt conveyor 71 toward the second discharge portion 92.

[0205] The third guide portion 74 conveys the belt conveyor 71 to a second position P2 (see FIG. 1 ) which is located upstream of the first position P1 in the belt conveyor 71 in the conveying direction D1. Figure 5 ) of the waste tire 200 is guided to the third discharge section 93 (see Figure 5 ). Specifically, the third discharge portion 93 is provided on the lower side than the conveying surface of the belt conveyor 71. In addition, the third discharge portion 93 is provided in a direction orthogonal to the conveying direction D1 and separated from the second position P2 of the belt conveyor 71. In addition, the third guide portion 74 is formed to be inclined downward from the second position P2 of the belt conveyor 71 toward the third discharge portion 93.

[0206] The fourth guide portion 75 conveys the belt conveyor 71 to a third position P3 (see FIG. 1 ) which is located upstream of the second position P2 in the conveying direction D1 on the belt conveyor 71. Figure 5 ), guided to the fourth discharge portion 94 among the plurality of discharge portions 90 (see Figure 5 ). Specifically, the fourth discharge portion 94 is provided on the lower side than the conveying surface of the belt conveyor 71. In addition, the fourth discharge portion 94 is provided in a direction orthogonal to the conveying direction D1 and separated from the third position P3 of the belt conveyor 71. In addition, the fourth guide portion 75 is formed to be inclined downward from the third position P3 of the belt conveyor 71 toward the fourth discharge portion 94.

[0207] The fifth guide portion 76 conveys the belt conveyor 71 to a fourth position P4 (see FIG. 1 ) which is located upstream of the third position P3 in the belt conveyor 71 in the conveying direction D1. Figure 5 ) of the waste tire 200 is guided to the fifth discharge section 95 (see Figure 5). Specifically, the fifth discharge portion 95 is provided on the lower side than the conveying surface of the belt conveyor 71. In addition, the fifth discharge portion 95 is provided in a direction orthogonal to the conveying direction D1 and separated from the fourth position P4 of the belt conveyor 71. In addition, the fifth guide portion 76 is formed to be inclined downward from the fourth position P4 of the belt conveyor 71 toward the fifth discharge portion 95.

[0208] The sixth guide portion 77 conveys the belt conveyor 71 to a fifth position P5 (see FIG. 5 ) which is located upstream of the fourth position P4 in the belt conveyor 71 in the conveying direction D1. Figure 5 ) of the waste tire 200 is guided to the sixth discharge section 96 (see Figure 5 ). Specifically, the sixth discharge portion 96 is provided on the lower side than the conveying surface of the belt conveyor 71. In addition, the sixth discharge portion 96 is provided in a direction orthogonal to the conveying direction D1 and separated from the fifth position P5 of the belt conveyor 71. In addition, the sixth guide portion 77 is formed to be inclined downward from the fifth position P5 of the belt conveyor 71 toward the sixth discharge portion 96.

[0209] The first movable guide portion 78 can be in the first posture (see Figure 5 ) and a second posture of guiding the waste tire 200 conveyed to the first position P1 in the belt conveyor 71 to the second guide portion 73. For example, the first movable guide portion 78 is a rod-shaped member swingably provided around an axis extending in a direction perpendicular to the conveying surface of the belt conveyor 71. The first movable guide portion 78 receives a driving force supplied from a driving portion not shown in the figure, and changes its posture between the first posture and the second posture.

[0210] The second movable guide portion 79 can be in the third posture (see Figure 5 ) and a fourth posture of guiding the waste tire 200 conveyed to the second position P2 in the belt conveyor 71 to the third guide portion 74. For example, the second movable guide portion 79 is a rod-shaped member swingably provided around an axis extending in a direction perpendicular to the conveying surface of the belt conveyor 71. The second movable guide portion 79 receives a driving force supplied from a driving portion not shown in the figure and changes its posture between the third posture and the fourth posture.

[0211] The third movable guide portion 80 can be in the fifth posture (see Figure 5) and a sixth posture of guiding the waste tire 200 conveyed to the third position P3 in the belt conveyor 71 to the fourth guide portion 75. For example, the third movable guide portion 80 is a rod-shaped member swingably provided around an axis extending in a direction perpendicular to the conveying surface of the belt conveyor 71. The third movable guide portion 80 receives a driving force supplied from a driving portion not shown in the figure and changes its posture between the fifth posture and the sixth posture.

[0212] The fourth movable guide portion 81 can be in a seventh position in which it is retreated from the belt conveyor 71 and an eighth position in which it guides the waste tire 200 conveyed to the fourth position P4 in the belt conveyor 71 toward the fifth guide portion 76 (see Figure 5 ). For example, the fourth movable guide portion 81 is a rod-shaped member swingably provided around an axis extending in a direction perpendicular to the conveying surface of the belt conveyor 71. The fourth movable guide portion 81 receives a driving force supplied from a driving portion not shown in the figure, and changes its posture between the seventh posture and the eighth posture.

[0213] The fifth movable guide portion 82 can be in the ninth posture (see Figure 5 ) and a tenth posture in which the waste tire 200 conveyed to the fifth position P5 in the belt conveyor 71 is guided to the sixth guide portion 77. For example, the fifth movable guide portion 82 is a rod-shaped member swingably provided around an axis extending in a direction perpendicular to the conveying surface of the belt conveyor 71. The fifth movable guide portion 82 receives a driving force supplied from a driving portion not shown in the figure and changes its posture between the ninth posture and the tenth posture.

[0214] like Figure 5 As shown, the reading unit 14 is disposed on the upstream side of the fifth position P5 in the conveying direction D1 of the belt conveyor 71. The reading unit 14 reads the tire identification information from the wireless tag 201 of the waste tire 200 conveyed by the belt conveyor 71. Figure 5 As shown, the reading unit 14 is a fixed RFID reader / writer.

[0215] like Figure 4 As shown, the control unit 11 of the waste tire identification system 100B includes a switching processing unit 61. It should be noted that the configurations of the acquisition processing unit 41 and the output processing unit 44 are common to the waste tire identification system 100A and the waste tire identification system 100B.

[0216] The determination processing unit 42 determines whether the tread portion of the scrap tire 200 is suitable as a raw material of the recycled material based on the tire information acquired by the acquisition processing unit 41 .

[0217] Specifically, the determination processing unit 42 determines which raw material of the recycled thermoplastic elastomer and the recycled plasticizer the tread portion of the waste tire 200 is suitable for based on the material composition information obtained by the acquisition processing unit 41. In addition, the determination processing unit 42 determines whether the tread portion of the waste tire 200 is suitable for the raw material of the rubber powder for tread compounding based on the material composition information and the manufacturing date information obtained by the acquisition processing unit 41. In addition, the determination processing unit 42 determines whether the tread portion of the waste tire 200 is suitable for the raw material of the rubber powder for non-tread compounding based on the material composition information and the manufacturing date information obtained by the acquisition processing unit 41. In addition, the determination processing unit 42 determines whether the tread portion of the waste tire 200 is suitable for the raw material of the recycled carbon black based on the material composition information obtained by the acquisition processing unit 41. It should be noted that the specific determination method according to the determination processing unit 42 is the same as that of the waste tire determination system 100A.

[0218] The decision processing unit 43 decides which of the recycled materials the tread portion of the waste tire 200 is used as based on the determination result of the determination processing unit 42. In addition, the decision processing unit 43 decides the manufacturing conditions of the recycled materials using the tread portion of the waste tire 200 or the use conditions of the recycled materials manufactured using the tread portion. It should be noted that the specific decision method of the decision processing unit 43 is the same as that of the waste tire determination system 100A.

[0219] The switching processing unit 61 switches the conveyance destination of the waste tire 200 by the conveying unit 51 based on the determination result by the determination processing unit 43 .

[0220] Specifically, the switching processing unit 61 switches the conveyance destination of the waste tire 200 by the conveyance unit 51 using the first movable guide unit 78 , the second movable guide unit 79 , the third movable guide unit 80 , the fourth movable guide unit 81 , and the fifth movable guide unit 82 .

[0221] For example, when the switching processing unit 61 determines that the tread portion of the waste tire 200 is used as the raw material of the recycled thermoplastic elastomer, the conveying destination of the waste tire 200 is switched to the first discharge unit 91. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the first posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the third posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the fifth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the seventh posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the ninth posture. Thus, the waste tire 200 conveyed by the belt conveyor 71 is guided toward the first guide portion 72 without coming into contact with any of the first movable guide portion 78 , the second movable guide portion 79 , the third movable guide portion 80 , the fourth movable guide portion 81 , and the fifth movable guide portion 82 .

[0222] In addition, regarding the switching processing unit 61, when it is determined that the tread portion of the waste tire 200 is used as the raw material of the recycled plasticizer, the conveying destination of the waste tire 200 is switched to the second discharge unit 92. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the second posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the third posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the fifth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the seventh posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the ninth posture. As a result, the waste tire 200 conveyed by the belt conveyor 71 is contacted with the first movable guide unit 78 and is guided to the second guide unit 73.

[0223] In addition, when the switching processing unit 61 determines that the tread portion of the waste tire 200 is used as the raw material of the rubber powder for tread compounding, the conveying destination of the waste tire 200 is switched to the third discharge unit 93. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the first posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the fourth posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the fifth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the seventh posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the ninth posture. As a result, the waste tire 200 conveyed by the belt conveyor 71 is contacted with the second movable guide unit 79 and is guided to the third guide unit 74.

[0224] In addition, regarding the switching processing unit 61, when it is determined that the tread portion of the waste tire 200 is used as the raw material of the non-tread compounding rubber powder, the conveying destination of the waste tire 200 is switched to the fourth discharge unit 94. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the first posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the third posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the sixth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the seventh posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the ninth posture. As a result, the waste tire 200 conveyed by the belt conveyor 71 is contacted with the third movable guide unit 80 and is guided to the fourth guide unit 75.

[0225] In addition, regarding the switching processing unit 61, when it is determined that the tread portion of the waste tire 200 is used as the raw material of the regenerated carbon black, the conveying destination of the waste tire 200 is switched to the fifth discharge unit 95. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the first posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the third posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the fifth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the eighth posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the ninth posture. As a result, the waste tire 200 conveyed by the belt conveyor 71 is contacted with the fourth movable guide unit 81 and is guided to the fifth guide unit 76.

[0226] In addition, regarding the switching processing unit 61, when it is determined that the tread portion of the waste tire 200 is not suitable for any of the raw materials of the recycled materials, the conveying destination of the waste tire 200 is switched to the sixth discharge unit 96. Specifically, the switching processing unit 61 sets the posture of the first movable guide unit 78 to the first posture. In addition, the switching processing unit 61 sets the posture of the second movable guide unit 79 to the third posture. In addition, the switching processing unit 61 sets the posture of the third movable guide unit 80 to the fifth posture. In addition, the switching processing unit 61 sets the posture of the fourth movable guide unit 81 to the seventh posture. In addition, the switching processing unit 61 sets the posture of the fifth movable guide unit 82 to the tenth posture. As a result, the waste tire 200 conveyed by the belt conveyor 71 is contacted with the fifth movable guide unit 82 and is guided to the sixth guide unit 77.

[0227] In the waste tire determination system 100B, the waste tire 200 is arranged at the end of the upstream side of the conveying direction D1 of the belt conveyor 71 by a person. Thus, the waste tire 200 is conveyed by the belt conveyor 71 via the reading unit 14. The reading unit 14 reads the tire identification information from the wireless tag 201 of the waste tire 200 when the waste tire 200 conveyed by the belt conveyor 71 enters the communication range. The acquisition processing unit 41 acquires the tire information based on the tire identification information when the tire identification information is read by the reading unit 14. In addition, the determination processing unit 42 determines whether the tread portion of the waste tire 200 is suitable as the raw material of the recycled material based on the tire information acquired by the acquisition processing unit 41. In addition, the determination processing unit 43 determines which type of the recycled material the tread portion of the waste tire 200 is used as based on the determination result of the determination processing unit 42. In addition, the switching processing unit 61 switches the transportation destination of the waste tire 200 by the conveying unit 51 based on the determination result of the determination processing unit 43. Thus, the waste tire 200 conveyed by the belt conveyor 71 is discharged to any one of the plurality of discharge parts 90 corresponding to the plurality of groups. That is, the waste tire 200 is classified into any one of the plurality of groups corresponding to the plurality of recycled materials. It should be noted that the portion other than the tread portion included in the classified waste tire 200 can be used for the manufacture of the non-tread compounding rubber powder or can be used as a base tire for retreading.

[0228] As such, the waste tire determination system 100B can perform the acquisition step, the determination step, the decision step, and the classification step included in the recycled material manufacturing method according to the embodiment of the present disclosure.

[0229] [Tire manufacturing method] Next, a tire manufacturing method according to an embodiment of the present disclosure will be described.

[0230] The tire manufacturing method according to the embodiment of the present disclosure includes a second manufacturing step.

[0231] In the second manufacturing step, the recycled material manufactured by the recycled material manufacturing method according to the embodiment of the present disclosure is processed to manufacture a tire. The second manufacturing step is performed by a person or a manufacturing machine. It should be noted that "processing of the recycled material" refers to any one or more treatments of mixing, extrusion, molding and vulcanization of the recycled material.

[0232] For example, in the second manufacturing step, a thermoplastic elastomer composition for a tire is manufactured using the recycled thermoplastic elastomer manufactured by the recycled material manufacturing method according to the embodiment of the present disclosure. As described above, the recycled thermoplastic elastomer determines the maximum amount of the blending ratio according to the ratio of the recycled thermoplastic elastomer contained in the thermoplastic elastomer composition serving as the raw material and the number of years it has passed. Therefore, when the recycled thermoplastic elastomer composition is used to manufacture a thermoplastic elastomer composition for a tire, the content of the recycled thermoplastic elastomer in the thermoplastic elastomer component is set to be less than the blending ratio. As for other thermoplastic elastomer components, virgin thermoplastic elastomers that have not yet been reused are used.

[0233] In addition, in the tire thermoplastic elastomer composition using the recycled thermoplastic elastomer, in addition to the recycled materials such as the tread compounding rubber powder, the non-tread compounding rubber powder, the recycled plasticizer and the recycled carbon black, the above-mentioned tire material can also be used in combination depending on the application.

[0234] In addition, in the second manufacturing step, a tread composition is manufactured using a combination of any one or more of the rubber powder for tread compounding, the regenerated carbon black, and the regenerated plasticizer manufactured by the regenerated material manufacturing method according to the embodiment of the present disclosure. For example, the tread composition can be manufactured by kneading the rubber powder for tread compounding, the regenerated carbon black, and the regenerated plasticizer manufactured by the regenerated material manufacturing method according to the embodiment of the present disclosure, and a diene rubber such as natural rubber, butadiene rubber, styrene butadiene rubber, a reinforcing material such as silica, and various compounding agents. In addition, in the second manufacturing step, the manufactured tread composition is used to form the tread portion of the tire.

[0235] In addition, in the second manufacturing step, a non-tread composition is manufactured using a combination of any one or more of the non-tread compounding rubber powder, the regenerated carbon black, and the regenerated plasticizer manufactured by the recycled material manufacturing method according to the embodiment of the present disclosure. For example, the non-tread composition can be manufactured by kneading the non-tread compounding rubber powder, the regenerated carbon black, and the regenerated plasticizer manufactured by the recycled material manufacturing method according to the embodiment of the present disclosure, and diene rubbers such as natural rubber, butadiene rubber, and styrene butadiene rubber, fillers such as silica, and various compounding agents. In addition, in the second manufacturing step, the manufactured non-tread composition is used to shape components such as belt covering layers, belt reinforcing layers, sidewall portions, rim bead wrapping portions, and bead filler portions in tires.

[0236] In addition, in the second manufacturing step, the tread portion formed using the tread composition, the inner liner portion prepared separately, and the components formed using the non-tread composition are combined to manufacture a green tire. Then, the manufactured green tire is vulcanized to manufacture a tire. In addition, the tire thermoplastic elastomer composition using the recycled thermoplastic elastomer is formed into the shape of each component and combined with other rubber compositions and thermoplastic elastomer compositions to manufacture a tire. It should be noted that the manufacturing method of the tire can use a conventionally known method.

[0237] In the tire manufacturing method according to the embodiment of the present disclosure, the tire is manufactured using the recycled material of higher quality than before. Therefore, the quality of the tire manufactured using the recycled material can be improved.

[0238] The embodiments of the present disclosure described above include the following disclosed matters (1) to (20).

[0239] The disclosure (1) is a method for determining waste tires, which comprises: Acquisition step: acquiring tire information related to waste tires; and A determination step of determining whether a part or all of the waste tire is suitable as a raw material of a predetermined recycled material based on the tire information acquired in the acquisition step.

[0240] According to this method, the waste tires suitable for the raw materials of the recycled materials can be sorted out from various types of the waste tires, thereby improving the quality of the recycled materials produced using the waste tires.

[0241] Publication (2) is a method for determining waste tires according to Publication (1), wherein in the acquisition step, the tire information is acquired from a wireless tag disposed in the waste tire on an inner side than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

[0242] According to this method, compared with the method of acquiring the tire information from the surface of the waste tire, the loss of information due to wear or damage on the outer surface of the waste tire can be avoided. Therefore, the probability of successfully acquiring the tire information can be increased.

[0243] Publication (3) is a method for determining whether a tire is waste according to Publication (1), wherein in the acquisition step, the tire information is acquired based on identification information of the waste tire acquired from a wireless tag disposed in the waste tire and located further inward than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

[0244] According to this method, similarly to the waste tire identification method of the disclosure (2), the probability of successfully acquiring the tire information can be increased.

[0245] Publication (4) is a method for identifying waste tires according to Publication (1), wherein the tire information is information identified before the waste tires are shipped from a factory.

[0246] Disclosure (5) is a method for determining waste tires according to any one of disclosures (1) to (4), wherein the tire information includes material composition information regarding the material composition of the waste tires, and in the determination step, based on the material composition information acquired in the acquisition step, it is determined whether a part or all of the waste tires are suitable as a raw material for the recycled material.

[0247] According to this method, the waste tires can be sorted in consideration of the material composition of the waste tires. Therefore, compared with the waste tire identification method described in the disclosure (1), the quality of the recycled material produced using the waste tires can be further improved.

[0248] Disclosure (6) is a method for identifying waste tires according to any one of Disclosures (1) to (5), wherein the recycled material comprises any one or more of rubber powder, recycled carbon black, recycled plasticizer, recycled rubber and recycled thermoplastic elastomer.

[0249] Disclosure (7) is a method for determining waste tires according to any one of disclosures (1) to (6), wherein one or more processors perform the obtaining step and the determining step.

[0250] According to this method, compared with a case where a person performs each step included in the waste tire determination method, the person's effort can be saved.

[0251] Disclosure (8) is a method for producing recycled materials, comprising: Acquisition step: acquiring tire information about waste tires; and A determination step: determining whether a part or all of the waste tire is suitable as a raw material for a predetermined recycled material based on the tire information acquired in the acquisition step; and A first production step of producing the recycled material using a part or all of the waste tires determined as being suitable as a raw material for the recycled material in the determination step.

[0252] According to this method, the waste tires suitable for the raw materials of the recycled materials can be sorted out from various types of the waste tires, and the recycled materials can be manufactured using the sorted waste tires. Therefore, the quality of the recycled materials manufactured using the waste tires can be improved.

[0253] Disclosure (9) is a method for producing recycled materials according to disclosure (8), wherein in the acquisition step, the tire information is acquired from a wireless tag disposed in the waste tire on an inner side relative to an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

[0254] According to this method, similarly to the waste tire identification method described in the disclosure (2), the probability of successfully acquiring the tire information can be increased.

[0255] Disclosure (10) is a method for producing recycled materials according to disclosure (8), wherein in the acquisition step, the tire information is acquired based on identification information of the waste tire acquired from a wireless tag disposed in the waste tire on an inner side relative to an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

[0256] According to this method, similarly to the waste tire identification method described in the disclosure (2), the probability of successfully acquiring the tire information can be increased.

[0257] Disclosure (11) is a method for producing recycled materials according to any one of disclosures (8) to (10), wherein the tire information includes material composition information about the material composition of the waste tire, and in the determination step, based on the material composition information acquired in the acquisition step, it is determined whether part or all of the waste tire is suitable as a raw material for the recycled material.

[0258] According to this method, similarly to the waste tire identification method described in the disclosure (5), the quality of the recycled material produced using the waste tire can be further improved.

[0259] Disclosure (12) is a method for producing a recycled material according to any one of Disclosures (8) to (11), wherein the first production step comprises: Thermal decomposition step: thermally decomposing at least a portion of the waste tire by heating via combustion or microwave irradiation; and Recovery step: recovering at least a portion of the decomposition product obtained in the thermal decomposition step.

[0260] According to this method, the thermal decomposition temperature when the waste tire is thermally decomposed can be adjusted based on its material composition. Therefore, by grouping the waste tires based on the material composition in advance and setting the thermal decomposition temperature for each group of the waste tires, the recycled material can be efficiently manufactured. In particular, in the case of thermal decomposition by heating according to microwave irradiation, the purity of the substance obtained by thermal decomposition can be improved, so the quality of the manufactured recycled material can be further improved.

[0261] Disclosure (13) is a method for producing recycled materials according to any one of disclosures (8) to (12), wherein the recycled materials include any one or more of rubber powder, recycled carbon black, recycled plasticizer, recycled rubber and recycled thermoplastic elastomer.

[0262] Disclosure (14) is a recycled material manufacturing method according to any one of disclosures (8) to (13), wherein one or more processors execute the acquisition step and the determination step.

[0263] According to this method, similar to the waste tire identification method described in Publication (7), human effort can be saved.

[0264] Disclosure (15) is a method for producing recycled materials according to any one of disclosures (8) to (14), wherein the recycled materials include a recycled plasticizer, and the first production step of producing the recycled plasticizer includes a thermal decomposition step of thermally decomposing a part or all of the waste tires determined to be suitable as raw materials for the recycled plasticizer.

[0265] Disclosure (16) is a method for producing recycled materials according to disclosure (15), wherein the thermal decomposition temperature T1 in the thermal decomposition step and the ratio R1 of the diene rubber component in the polymer component in a part or all of the thermally decomposed waste tires satisfy the following formula (3).

[0266] R1 × T1 ≤ 300 ··· (3)

[0267] According to this method, the higher the ratio of the diene rubber component in the polymer component, the lower the upper limit of the thermal decomposition temperature becomes, so that the recombination caused by the free radicals generated during thermal decomposition can be suppressed.

[0268] Disclosure (17) is a method for producing recycled materials according to any one of disclosures (8) to (16), wherein the recycled materials include rubber powder, and the first production step of producing the rubber powder includes a pulverizing step of pulverizing a part or all of the waste tires determined to be suitable as raw materials for the rubber powder.

[0269] Disclosure (18) is a method for producing recycled materials according to disclosure (17), wherein the atmosphere temperature T2 during the pulverization in the pulverization step and the carbon black content ratio R2 in a part or all of the pulverized waste tires satisfy the following formula (4).

[0270] T2 ≤ 50 - R2 × 0.5 ··· (4)

[0271] According to this method, the higher the content of carbon black is, the lower the upper limit of the atmosphere temperature during pulverization becomes. Therefore, it is possible to suppress the heat generated by the mechanical force applied to a part or all of the waste tire when pulverizing the part or all of the waste tire. Therefore, it is possible to suppress the situation in which a part or all of the waste tire becomes plasticized due to heat and becomes impossible to pulverize when pulverizing the part or all of the waste tire.

[0272] Disclosure (19) is a method for producing recycled materials according to any one of disclosures (8) to (18), wherein the recycled material comprises either or both of recycled carbon black and recycled monomers, and the first production step for producing either or both of the recycled carbon black and recycled monomers comprises a thermal decomposition step of thermally decomposing a portion or all of the waste tires determined to be suitable as raw materials for either or both of the recycled carbon black and recycled monomers.

[0273] Disclosure (20) is a method for producing recycled materials according to disclosure (19), wherein the thermal decomposition temperature T3 in the thermal decomposition step and the content ratio R3 of carbon black in a part or all of the thermally decomposed waste tires satisfy the following formula (6).

[0274] T3 ≥ 600 - R3 × 2.5 ··· (6)

[0275] According to this method, the lower the content of carbon black is, the higher the lower limit of the thermal decomposition temperature becomes. Therefore, the reduction in heat conduction caused by the low content of carbon black can be compensated. Therefore, the reduction in the manufacturing efficiency of the regenerated carbon black caused by the low content of carbon black can be suppressed.

[0276] Disclosure (21) is a method for producing recycled materials according to disclosure (19), wherein a thermal decomposition temperature T4 during thermal decomposition by heating via microwave irradiation in the thermal decomposition step and a content ratio R4 of carbon black in a part or all of the thermally decomposed waste tires satisfy the following formula (7).

[0277] T4 ≥ 350 - R4 × 2.5 ··· (7)

[0278] According to this method, similarly to the method for producing recycled materials described in Publication (20), it is possible to suppress a decrease in the production efficiency of the recycled carbon black due to a low content of carbon black. In addition, by using microwaves, efficient thermal decomposition can be performed.

[0279] Disclosure (22) is a tire manufacturing method, comprising: Second manufacturing step: manufacturing a tire by processing the recycled material manufactured by the recycled material manufacturing method according to any one of the disclosed matters (8) to (21).

[0280] According to this method, a tire can be manufactured using the high-quality recycled material. Therefore, the quality of the tire manufactured using the recycled material can be improved.

Claims

1. A method for determining waste tires, comprising: Acquisition steps: acquiring tire information related to waste tires; as well as A determination step of determining whether a part or all of the waste tire is suitable as a raw material of a predetermined recycled material based on the tire information acquired in the acquisition step.

2. The method for determining waste tires according to claim 1, wherein: In the acquisition step, the tire information is acquired from a wireless tag provided in the waste tire on an inner side than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

3. The method for determining waste tires according to claim 1, wherein: In the acquisition step, the tire information is acquired based on identification information of the waste tire acquired from a wireless tag provided in the waste tire on an inner side than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

4. The method for identifying waste tires according to claim 1, wherein: The tire information is information identified before the waste tire is shipped out of the factory.

5. The method for identifying waste tires according to any one of claims 1 to 4, wherein: The tire information includes material composition information about the material composition of the waste tire. In the determination step, it is determined whether a part or all of the waste tire is suitable as a raw material of the recycled material based on the material composition information acquired in the acquisition step.

6. The method for identifying waste tires according to any one of claims 1 to 4, wherein: The recycled material comprises any one or more of rubber powder, recycled carbon black, recycled plasticizer, recycled rubber and recycled thermoplastic elastomer.

7. The method for identifying waste tires according to any one of claims 1 to 4, wherein: One or more processors perform the obtaining step and the determining step.

8. A method for producing a recycled material, comprising: Acquisition steps: acquiring tire information related to waste tires; as well as Determining step: determining whether part or all of the waste tire is suitable as a raw material for a predetermined recycled material based on the tire information acquired in the acquiring step; as well as A first production step of producing the recycled material using a part or all of the waste tires determined as being suitable as a raw material for the recycled material in the determination step.

9. The method for producing recycled materials according to claim 8, wherein: In the acquisition step, the tire information is acquired from a wireless tag provided in the waste tire on an inner side than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

10. The method for producing recycled materials according to claim 8, wherein: In the acquisition step, the tire information is acquired based on identification information of the waste tire acquired from a wireless tag provided in the waste tire on an inner side than an outer surface of the waste tire, or from both the wireless tag and the surface of the waste tire.

11. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The tire information includes material composition information about the material composition of the waste tire. In the determination step, it is determined whether a part or all of the waste tire is suitable as a raw material of the recycled material based on the material composition information acquired in the acquisition step.

12. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The first manufacturing step comprises: Thermal decomposition step: thermally decomposing at least a portion of the waste tire by heating via combustion or microwave irradiation; and Recovery step: recovering at least a portion of the decomposition product obtained in the thermal decomposition step.

13. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The recycled material comprises any one or more of rubber powder, recycled carbon black, recycled plasticizer, recycled rubber and recycled thermoplastic elastomer.

14. The method for producing a recycled material according to any one of claims 8 to 10, wherein: One or more processors perform the obtaining step and the determining step.

15. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The recycled material comprises a recycled plasticizer, The first production step of producing the recycled plasticizer includes a thermal decomposition step of thermally decomposing a part or all of the waste tire determined to be a suitable raw material for the recycled plasticizer.

16. The method for producing recycled materials according to claim 15, wherein: The thermal decomposition temperature T1 in the thermal decomposition step and the ratio R1 of the diene rubber component in the polymer component in a part or all of the thermally decomposed waste tire satisfy the following formula (1): R1 × T1 ≤ 300 ··· (1).

17. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The recycled material comprises rubber powder, The first production step of producing the rubber powder includes a pulverizing step of pulverizing a part or all of the waste tires determined to be suitable as a raw material for the rubber powder.

18. The method for producing recycled materials according to claim 17, wherein: The atmosphere temperature T2 during the pulverization step and the carbon black content R2 in a part or all of the pulverized waste tires satisfy the following formula (2): T2 ≤ 50 - R2 × 0.5 ··· (2).

19. The method for producing a recycled material according to any one of claims 8 to 10, wherein: The recycled material comprises either or both of recycled carbon black and recycled monomers, The first production step of producing one or both of the regenerated carbon black and the regenerated monomer includes a thermal decomposition step of thermally decomposing a part or all of the waste tire determined to be a suitable raw material for one or both of the regenerated carbon black and the regenerated monomer.

20. The method for producing recycled materials according to claim 19, wherein: The thermal decomposition temperature T3 in the thermal decomposition step and the content ratio R3 of carbon black in a part or all of the thermally decomposed waste tires satisfy the following formula (3): T3 ≥ 600 - R3 × 2.5 ··· (3).

21. The method for producing recycled materials according to claim 19, wherein: The thermal decomposition temperature T4 when thermal decomposition is performed by heating through microwave irradiation in the thermal decomposition step, and the content ratio R4 of carbon black in a part or all of the thermally decomposed waste tires satisfy the following formula (4): T4 ≥ 350 - R4 × 2.5 ··· (4).

22. A method for manufacturing a tire, comprising: A second manufacturing step of manufacturing a tire by processing the recycled material manufactured by the recycled material manufacturing method according to any one of claims 8 to 10.

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