US-20260124790-A1 - METHOD OF RECYCLING USED TIRES, METHOD OF PRODUCING PYROLYSATE, PYROLYSATE, METHOD OF PRODUCING RUBBER PRODUCT, RUBBER PRODUCT, METHOD OF PRODUCING TIRE, AND TIRE

US20260124790A1US 20260124790 A1US20260124790 A1US 20260124790A1US-20260124790-A1

Abstract

A method of recycling used tires that includes: a collection step (S 1 ) of collecting used tires; a data acquisition step (S 2 ) of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires; a classification step (S 3 ) of classifying the used tires; and a recycling processing step (S 4 ) of carrying out recycling processing of the used tires that have been classified, under appropriate conditions for each of the groups.

Inventors

Seiichi Tahara
Masahiro Hojo
Akira Okuno
Yuki OKINAGA
Marino KUNO
Kenta OGURA

Assignees

BRIDGESTONE CORPORATION

Dates

Publication Date: 20260507
Application Date: 20231109
Priority Date: 20221219

Claims (20)

1 . A method of recycling used tires, the method comprising: a collection step of collecting used tires; a data acquisition step of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires; a classification step of classifying the used tires into groups based on the used tire data; and a recycling processing step of carrying out recycling processing of the used tires that have been classified, under appropriate conditions for each of the groups.
2 . The method of recycling used tires according to claim 1 , wherein, in the data acquisition step, the information read from the used tires includes identification numbers of the used tires, and the used tire data is acquired by accessing, via a network, a database in which the identification numbers are associated with the used tire data.
3 . The method of recycling used tires according to claim 1 , wherein the used tire data includes at least one of data on category, type, size, rubber property, producer, or date of production of the used tires, and the classification step classifies the used tires based on at least one of category, type, size, rubber property, producer, or date of production of the used tires.
4 . The method of recycling used tires according to claim 1 , wherein the used tire data includes data regarding at least one of a polymer, a filler, or sulfur component of the used tires, and the classification step classifies the used tires based on the data regarding at least one of the polymer, the filler, or the sulfur component of the used tires.
5 . The method of recycling used tires according to claim 1 , wherein the used tire data includes data on structure of members of the used tires.
6 . The method of recycling used tires according to claim 1 , wherein, in the classification step, a plurality of stages of grouping are executed based on rubber blends of treads or state of wear of the used tires.
7 . The method of recycling used tires according to claim 1 , wherein, in the classification step, grouping is executed based on compound content or degree of reduction of oil, age resistor, wax, or adhesive material in the used tires.
8 . The method of recycling used tires according to claim 1 , wherein the used tire data includes material information indicating a fiber type of an organic fiber.
9 . A method of producing pyrolysate, the method comprising: a collection step of collecting used tires; a data acquisition step of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires; a classification step of classifying the used tires into groups based on the used tire data; and a recycling processing step of carrying out recycling processing, which is pyrolysis, on the used tires that have been classified, under appropriate conditions for each of the groups; and an extraction step of extracting pyrolysate produced by the pyrolysis.
10 . Pyrolysate produced by the method of producing pyrolysate according to claim 9 .
11 . A method of producing a rubber product, wherein pyrolysate produced by the method of producing pyrolysate according to claim 9 is used as a portion of raw material to produce the rubber product.
12 . A rubber product produced by the method of producing a rubber product according to claim 11 .
13 . A method of producing a tire, wherein pyrolysate produced by the method of producing pyrolysate according to claim 9 is used as a portion of raw material to produce the tire.
14 . A tire produced by the method of producing a tire according to claim 13 .
15 . A method of recycling used tires, the method comprising: a collection step of collecting used tires; a data acquisition step of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires; a step of disassembling the used tires into component members; a classification step of classifying the component members of the used tires into groups based on the used tire data; a recycling processing step of carrying out recycling processing of the component members of the used tires that have been classified, under appropriate conditions for each of the groups.
16 . The method of recycling used tires according to claim 2 , wherein the used tire data includes at least one of data on category, type, size, rubber property, producer, or date of production of the used tires, and the classification step classifies the used tires based on at least one of category, type, size, rubber property, producer, or date of production of the used tires.
17 . The method of recycling used tires according to claim 2 , wherein the used tire data includes data regarding at least one of a polymer, a filler, or sulfur component of the used tires, and the classification step classifies the used tires based on the data regarding at least one of the polymer, the filler, or the sulfur component of the used tires.
18 . The method of recycling used tires according to claim 2 , wherein the used tire data includes data on structure of members of the used tires.
19 . The method of recycling used tires according to claim 2 , wherein, in the classification step, a plurality of stages of grouping are executed based on rubber blends of treads or state of wear of the used tires.
20 . The method of recycling used tires according to claim 2 , wherein, in the classification step, grouping is executed based on compound content or degree of reduction of oil, age resistor, wax, or adhesive material in the used tires.

Description

TECHNICAL FIELD The present disclosure relates to a method of recycling used tires, a method of producing pyrolysate, pyrolysate, a method of producing a rubber product, a rubber product, a method for producing a tire, and a tire. BACKGROUND Conventionally, recycling has been carried out by pyrolyzing organic waste and extracting pyrolysate from produced oil for reuse. For example, Patent Literature (PTL) 1 describes a pyrolysate oil processing system that can separate class 1 petroleum to obtain good quality recycled oil by controlling temperature immediately above a liquefied component collection means. CITATION LIST Patent Literature PTL 1: JP 2014-240460 A SUMMARY Technical Problem Used tires comprise compound material and are therefore generally difficult to recycle. Further, used tires are sometimes classified by size based on maximum size that can be handled by recycling facilities, but conventionally, used tires are rarely classified in any other way. As a result, used tires including various components are recycled together, resulting in variations in quality of pyrolysate obtained. Accordingly, it is difficult to maintain quality of recycled products such as tires that are made from pyrolysate obtained in recycling. Further, in order that quality of pyrolysate be uniform, processing is required, resulting in poor recycling efficiency. In view of such circumstances, it would be helpful to provide a method of recycling used tires, a method of producing pyrolysate, pyrolysate, a method of producing a rubber product, a rubber product, a method of producing a tire, and a tire that can improve product quality and recycling efficiency in recycling. Solution to Problem (1) A method of recycling used tires according to an embodiment of the present disclosure includes: a collection step of collecting used tires;a data acquisition step of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires;a classification step of classifying the used tires into groups based on the used tire data; anda recycling processing step of carrying out recycling processing of the used tires that have been classified, under appropriate conditions for each of the groups. (2) The method of recycling used tires according to (1), as an embodiment of the present disclosure, wherein, in the data acquisition step, the information read from the used tires includes identification numbers of the used tires, and the used tire data is acquired by accessing, via a network, a database in which the identification numbers are associated with the used tire data. (3) The method of recycling used tires according to (1) or (2), as an embodiment of the present disclosure, wherein the used tire data includes at least one of data on category, type, size, rubber property, producer, or date of production of the used tires, andthe classification step classifies the used tires based on at least one of category, type, size, rubber property, producer, or date of production of the used tires. (4) The method of recycling used tires according to (1) or (2), as an embodiment of the present disclosure, wherein the used tire data includes data regarding at least one of a polymer, a filler, or sulfur component of the used tires, andthe classification step classifies the used tires based on the data regarding at least one of the polymer, the filler, or the sulfur component of the used tires. (5) The method of recycling used tires according to any one of (1) to (4), as an embodiment of the present disclosure, wherein the used tire data includes data on structure of members of the used tires. (6) The method of recycling used tires according to any one of (1) to (5), as an embodiment of the present disclosure, wherein, in the classification step, a plurality of stages of grouping are executed based on rubber blends of treads or state of wear of the used tires. (7) The method of recycling used tires according to any one of (1) to (6), as an embodiment of the present disclosure, wherein, in the classification step, grouping is executed based on compound content or degree of reduction of oil, age resistor, wax, or adhesive material in the used tires. (8) The method of recycling used tires according to any one of (1) to (7), as an embodiment of the present disclosure, wherein the used tire data includes material information indicating a fiber type of an organic fiber. (9) A method of producing pyrolysate according to an embodiment of the present disclosure includes: a collection step of collecting used tires;a data acquisition step of acquiring used tire data regarding at least one of specifications or components of the used tires, based on information read from the used tires;a classification step of classifying the used tires into groups based on the used tire data;a recycling processing step of carrying out recycling processing, which is pyrolysis, on the used tires that have been cl