JP7667273B2 - Resin waste management and collection method, and recycling management system - Google Patents

Description

This disclosure relates to a method for managing and recovering resin scraps, as well as a recycling management system.

2. Description of the Related Art Plastic lenses, which are lenses containing resin, are lighter and less likely to break than inorganic lenses, and can be dyed, and therefore have rapidly become more widely used in recent years for applications such as eyeglass lenses and camera lenses.
For example, various studies have been conducted on lenses containing polythiourethane resins (see, for example, Patent Documents 1 to 3).

Meanwhile, in recent years, due to the problem of global warming, recycling technologies have been considered to reduce the environmental burden.
For example, a CO2 reduction credit calculation system has been disclosed that uses wastewater oils and fats to reduce CO2 and calculates CO2 reduction credits based on the reduction (see, for example, Patent Document 4). This system calculates the amount of CO2 reduction using input information, and calculates CO2 reduction credits based on the amount of CO2 reduction.

Patent Document 1: Japanese Patent Application Publication No. 63-46213 Patent Document 2: Japanese Patent Application Publication No. 2-270859 Patent Document 3: Japanese Patent Application Publication No. 7-252207 Patent Document 4: Japanese Patent No. 6763594

Lenses (e.g., eyeglass lenses) containing polythiourethane resin are manufactured by processing (e.g., cutting) a molded body containing polythiourethane resin. As a result, a large amount of processing waste (e.g., cutting waste) containing polythiourethane resin is generated as waste during the lens manufacturing process. Conventionally, processing waste has only been burned or buried as industrial waste, and has not been effectively utilized.
However, due to societal demands for environmental consideration, a technology is desired for recycling polythiourethane resin, in which processing scraps containing polythiourethane resin as waste are subjected to some kind of treatment (e.g., chemical decomposition treatment) to obtain polythiourethane resin raw material (i.e., raw materials for producing polythiourethane resin; for example, a polythiol composition and a polyisocyanate compound).
Furthermore, in order to effectively realize the recycling of polythiourethane resin, it is desirable to manage the processing waste containing polythiourethane resin in a manner that allows easy determination of the treatment (e.g., recycling, abandonment, etc.) to be performed on the processing waste. This is because, for example, from the viewpoint of life cycle assessment, depending on the information on the processing waste (e.g., the type of resin contained), it may be more desirable to discard the processing waste rather than to recycle it. Also, when the processing waste is to be recycled, the appropriate treatment for recycling may differ depending on the information on the processing waste.

In addition to the example of recycling processing waste containing polythiourethane resin, there are cases where a method is desired for managing resin scraps, which are processing waste from resin moldings (e.g., resin moldings for manufacturing eyeglass lenses made of resins other than polythiourethane resin), in a manner that makes it easy to determine what treatment (e.g., recycling, disposal, etc.) should be applied to the resin scraps.

In addition, when recycling resin scraps, which are waste from the processing of resin moldings, it is effective to manage information on the collected resin scraps, the recycled raw materials obtained by reusing this resin scraps (e.g., the aforementioned polythiourethane resin raw materials), and products made from these recycled raw materials (e.g., the aforementioned eyeglass lenses) in a traceable manner. This is because, in order to guarantee the quality of products made from recycled raw materials, it is effective to accumulate this information in a traceable form. It is also effective to utilize the accumulated information to improve the recycling process.

An object of one embodiment of the present disclosure is to provide a resin scrap management method that can manage resin scrap, which is processed powder of resin molded bodies, in a manner that makes it easy to determine the treatment that should be applied to the resin scrap, and a resin scrap recovery method that can recover the resin scrap managed by this management method.
An object of another aspect of the present disclosure is to provide a recycle management system that can manage, in a traceable manner, information about collected resin scraps, recycled raw materials obtained by reusing the resin scraps, and products using the recycled raw materials.

Means for solving the above problems include the following aspects.
<1> A method for managing resin scraps, comprising: managing resin scraps X1, which are processed powder of a resin molding, in association with information X1 relating to the resin scraps X1.
<2> Furthermore,
preparing a first database in which information on resin scraps is associated with whether or not the resin scraps are to be recycled through chemical decomposition reaction;
A first decision is made by checking the information X1 associated with the resin scrap X1 against the first database to decide whether or not the resin scrap X1 is to be recycled;
The method for managing resin scraps according to <1>,
<3> Furthermore,
preparing a second database in which information on the resin waste corresponds to a chemical decomposition method for the resin waste;
A second decision is made to determine a chemical decomposition method for the resin scrap X1 by checking the information X1 associated with the resin scrap X1 against the second database when the first decision is made to select the resin scrap X1 as a target for recycling.
The method for managing resin scraps according to <2>,
<4> The first decision is made based on a calculated value of a life cycle assessment, and when the calculated value is equal to or greater than a predetermined value, it is decided that the resin scrap X1 is to be the target of the recycling, and when the calculated value is less than the predetermined value, it is decided that the resin scrap X1 is not to be the target of the recycling.
The method for managing resin scraps according to <2> or <3>.
<5> The management is
Manage the resin scraps X1 in a container;
At least one of providing the container with the information X1 and containing a component corresponding to the information X1 in the resin scrap X1;
Including,
The method for managing resin scraps according to any one of <1> to <4>.
<6> The information X1 includes information regarding the type of resin in the resin scrap X1,
The method for managing resin scraps according to any one of <1> to <5>.
<7> The resin molded body is a resin molded body for manufacturing eyeglass lenses,
The method for managing resin scraps according to <6>.
<8> A method for recovering resin scraps, comprising recovering the resin scraps X1 managed by the method for managing resin scraps according to any one of <1> to <7>.

<9> A recycle management system having a first registration unit, a second registration unit, a third registration unit, and a fourth registration unit,
The first registration unit registers identification information for tracking and collection information, which is information about the collected resin waste, which is processing waste of the resin molded body, in association with each other;
The second registration unit registers the identification information and information regarding a predetermined chemical decomposition method for the resin scrap in association with each other,
The third registration unit registers the identification information in association with decomposition information, which is information about recycled raw materials obtained by decomposing the resin scraps by the chemical decomposition method;
The fourth registration unit registers the identification information and reuse information, which is information about a product using the recycled raw materials, in association with each other.
Recycling management system.
<10> The recycle management system according to <9>, wherein the collection information includes at least one of property information on the resin scraps, product information before processing, and information on a collection source.
<11> The recycle management system according to <10>, wherein the property information includes information on a specific component that can determine that the resin scrap is a target for reuse.
<12> The recycle management system according to any one of <9> to <11>, wherein each of the registrations in the first registration unit, the registration in the second registration unit, the registration in the third registration unit, and the registration in the fourth registration unit is recorded in a blockchain represented by a series of blocks indicating each registration process, and a hash value calculated in the previous block is recorded as the identification information.
<13> The decomposition information includes a result of analyzing the content of impurities in the recycled raw material,
The recycle management system according to any one of <9> to <12>.
<14> The reuse information includes an environmental friendliness evaluation value calculated from the usage ratio of the reused raw materials in the product.
The recycle management system according to any one of <9> to <13>.
<15> A database in which information on the resin scraps is associated with application standards for the chemical decomposition method,
changing an application criterion for the chemical decomposition method based on the evaluation value;
The recycling management system according to <14>.

<16> accepting a search using at least one of the identification information, the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information as a search key;
presenting, as a search result, identification information associated with the information corresponding to the search key, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information registered in association with the identification information;
The recycle management system according to any one of <9> to <15>.
<17> The decomposition information includes information on success or failure of the decomposition,
Accepts searches using failure as a search key,
presenting the identification information associated with the decomposition information including the failure of decomposition, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information registered in association with the identification information;
The recycle management system according to any one of <9> to <16>.
<18> Accepting a search using the product using the recycled raw materials as a search key,
presenting, as a search result, identification information associated with the reuse information corresponding to the product that matches the search key, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information that are registered in association with the identification information;
The recycle management system according to any one of <9> to <17>.

According to one aspect of the present disclosure, there is provided a resin scrap management method that can manage resin scrap, which is processed powder of resin moldings, in a manner that makes it easy to determine the treatment that should be applied to the resin scrap, and a resin scrap recovery method that can recover the resin scrap managed by this management method.
According to another aspect of the present disclosure, there is provided a recycle management system that can manage, in a traceable manner, information regarding collected resin scraps, recycled raw materials obtained by reusing the resin scraps, and products using the recycled raw materials.

FIG. 2 is a conceptual diagram showing an example of an embodiment of a method for managing resin scraps according to the present disclosure, in which a component corresponding to information X1 is contained in resin scraps X1. FIG. 2 is a conceptual diagram showing an example of a mode in which information X1 is assigned to a container that stores resin scraps X1 in one embodiment of the resin scrap management method of the present disclosure. FIG. 13 is a conceptual diagram showing an example of a processing routine including a first decision in an embodiment of the resin scrap management method of the present disclosure. FIG. 13 is a conceptual diagram showing an example of a processing routine including a second decision in an embodiment of the resin scrap management method of the present disclosure. FIG. 1 is a conceptual diagram showing an example of a business model for recycling eyeglass lenses to which an embodiment of the resin scrap management method of the present disclosure can be applied. FIG. 1 is a block diagram showing a hardware configuration in an embodiment of a recycle management system according to the present disclosure. FIG. 1 is a diagram showing a functional configuration of an embodiment of a recycle management system according to the present disclosure. FIG. 2 is a diagram showing an example of first registration information in an embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of second registration information in an embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of third registration information in an embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of fourth registration information in an embodiment of the recycling management system of the present disclosure. FIG. 13 is a diagram showing an example of a search interface in one embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of a search result when searching by identification information in one embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of a registration processing routine in an embodiment of the recycle management system of the present disclosure. FIG. 11 is a diagram showing an example of a search processing routine in an embodiment of the recycling management system of the present disclosure. FIG. 13 is a diagram showing an example of management of registration processing by blockchain in one embodiment of the recycle management system of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as necessary.
In the drawings, the same or equivalent components and parts are denoted by the same reference numerals, and the dimensional ratios of the drawings may be exaggerated for the convenience of explanation and may differ from the actual ratios.

[Method of managing resin waste]
The method of managing resin scraps according to the present disclosure includes managing resin scraps X1, which are scraps from processing of resin molded bodies, in association with information X1 relating to the resin scraps X1.
Conventionally, waste generated from processing of resin moldings has been simply treated as waste without any information being added thereto or associated with any information.
In contrast, in the method of managing resin scraps of the present disclosure, resin scraps X1, which are scraps from the processing of resin molded bodies, are managed in association with information X1 relating to the resin scraps X1.
This makes it possible to manage the resin scraps X1, which are scraps from the processing of resin moldings, in a manner that makes it easy to determine the treatment that should be performed on the resin scraps X1.
The resin waste X1 may be disposed of, recycled through a chemical decomposition reaction (more specifically, reused), or the like.

The resin scraps X1 are scraps produced by processing resin moldings.
Here, the processing waste of a resin molding refers to waste (i.e., unnecessary parts) generated when a resin molding is processed to obtain a product (for example, a spectacle lens).
There is no particular limitation on the form of the resin waste that is the processing waste.
Examples of the resin waste include resin powder, resin lumps, and resin pieces.
Examples of waste from the processing of resin molded bodies include cutting waste (e.g., cutting powder), polishing waste, grinding waste, crushing waste, and resin pieces generated by cracks or chips during processing.

The resin scraps X1 contain resin as a main component.
In the present disclosure, a main component refers to a component whose content is 50% by mass or more.
The proportion of the resin in the total amount of the resin scraps X1 is preferably 60% by mass or more, and more preferably 80% by mass or more.
The resin scraps X1 may contain only one type of resin or two or more types of resin.

Resin scraps X1 are
It is preferable that the resin composition contains at least one selected from the group consisting of a poly(thio)urethane resin, an episulfide resin, a polycarbonate resin, a polyester resin, a polyamide resin, a polyimide resin, a poly(meth)acrylate resin, a polyolefin resin, a poly(thio)urethane urea resin, a polysulfide resin, a poly(meth)(thio)acrylate resin, an allyl diglycol carbonate resin, and an allyl diglycidyl carbonate resin,
More preferably, the resin composition contains at least one selected from the group consisting of a polythiourethane resin, an episulfide resin, a polycarbonate resin, a poly(meth)acrylate resin, and an allyl diglycol carbonate resin,
It is more preferable that the resin contains a polythiourethane resin.
Where:
The poly(thio)urethane resin refers to a polyurethane resin or a polythiourethane resin.
The poly(meth)acrylate resin refers to a polyacrylate resin or a polymethacrylate resin.
The poly(thio)urethane urea resin refers to a polyurethane urea resin or a polythiourethane resin.
The poly(meth)(thio)acrylate resin refers to a polyacrylate resin, a polythioacrylate resin, a polymethacrylate resin, or a polythiomethacrylate resin.
These resins are suitable, for example, as resins in resin molded articles for manufacturing eyeglass lenses.

The resin waste X1 may contain components other than resin.
Examples of components other than the resin include additives for resin, water, oil (for example, grinding oil), abrasives, surfactants, acids, alkalis, and the like.

The information X1 related to the resin scrap X1 that is associated with the resin scrap X1 includes, for example, property information about the resin scrap X1.
The property information of the resin scrap X1 may be, for example,
Information on the properties of the resin in the resin waste X1 (e.g., information on the type of resin, specific gravity, etc.);
Information on the resin content in the resin scrap X1,
Information on the properties of components other than resin in the resin waste X1 (e.g., moisture, oil (e.g., grinding oil), abrasives, surfactants, acids, alkalis, etc.) (e.g., information on type, specific gravity, etc.),
Information on the content of components other than resin in the resin waste X1,
etc.
The information X1 may be only one piece of information or may be two or more pieces of information.

The information X1 regarding the resin scrap X1 preferably includes information regarding the type of resin in the resin scrap X1. This makes it easier to determine the treatment to be performed on the resin scrap X1. In particular, it makes it easier to determine whether the resin scrap X1 should be recycled by chemical decomposition reaction.
Here, the type of resin may be specified by the type of monomers for forming the resin (the monomer composition ratio when the resin is formed from two or more types of monomers).

In the method for managing resin scraps according to the present disclosure, the resin scraps X1 are managed, for example, by storing the resin scraps X1 in a container.
In this case, management of the resin waste X1 may include at least one of attaching the information X1 to a container and making the resin waste X1 contain a component corresponding to the information X1.
This embodiment is excellent in terms of ease of reading the information X1.
From the viewpoint of making it easier to ensure the traceability of the resin scrap X1, it is preferable that the management of the resin scrap X1 includes causing the resin scrap X1 to contain a component corresponding to the information X1.

FIG. 1 is a conceptual diagram showing an example of an embodiment in which a component corresponding to information X1 is contained in resin waste X1.
As shown in FIG. 1, in this example, a resin scrap 10 (an example of resin scrap X1) containing a resin component 11 is made to contain a component 12 corresponding to information X1.
In this example, when the resin waste 10 is analyzed and the component 12 is detected, it can be determined that the resin waste 10 has the information X1.

The information X1 is information about the type of resin in the resin waste X1, for example, information such as "the resin waste contains a specific type of resin A."
In this case, in the distribution system of the resin scraps, if the resin scraps contain a specific type of resin A, the resin scraps are managed so that they contain component 12, thereby ensuring the traceability of the resin scraps.

The component 12 may be contained in advance in the resin molding that is the raw material of the resin scraps 10 .
Furthermore, the component 12 may be added to the resin scraps during the processing stage (for example, cutting stage) in which the resin molded body is processed to obtain the resin scraps and/or after the processing (for example, after cutting), to obtain the resin scraps 10.

Component 12 may be, for example, a component containing an isotope element.
For example, a component in which a certain element (e.g., carbon, hydrogen, etc.) in the resin component 11 is changed to an isotope element can be used as the component 12. In this case, since the properties of the component 12 are similar to those of the resin component 11, it is possible to reduce the influence of further adding the component 12 to the resin scrap 10 containing the resin component 11.

FIG. 2 is a conceptual diagram showing an example of a mode in which information X1 is provided on a container that contains resin waste X1.
2, in this example, a label 14 displaying information X1 is attached to a container 13 that contains resin scrap 10 as resin scrap X1. The resin scrap 10 in this example also contains a resin component 11 (not shown), but may or may not contain a component 12.
On the label 14, the information X1 may be displayed using visually readable characters, or may be displayed using a code (bar code, dot code, etc.) that can be read by a reader.

When information X1 is information that "resin scrap contains a specific type of resin A," traceability of the resin scrap is ensured by managing the resin scrap within the distribution system in such a way that a label 14 displaying information X1 is attached to a container that holds the resin scrap when the resin scrap contains a specific type of resin A.

The method for managing resin scraps according to the present disclosure includes:
Furthermore,
preparing a first database in which information on resin scraps is associated with whether or not the resin scraps are to be recycled through chemical decomposition reaction;
A first decision is made by checking the information X1 associated with the resin scrap X1 against a first database to decide whether or not the resin scrap X1 is to be recycled;
may include:
According to this aspect, by utilizing the first database prepared in advance, it is possible to easily determine whether or not the resin scraps X1, which are processed powder of resin moldings, are to be recycled through chemical decomposition reaction.

The first decision can be made from various perspectives.
As an example, the first decision is made based on a calculated value of a life cycle assessment (LCA), and if the calculated value is equal to or greater than a predetermined value, it is decided that the resin scrap X1 is to be recycled, and if the calculated value of the LCA is less than the predetermined value, it is decided that the resin scrap X1 is not to be recycled (for example, to be disposed of).
When the resin molded article is a resin molded article for manufacturing eyeglass lenses, the calculated LCA value is obtained taking into account the entire life cycle of the eyeglass lenses.
The LCA calculation can be performed according to a conventional method, and there is no particular limitation.

The method for managing resin scraps according to the present disclosure, which includes the first determination, comprises:
Furthermore,
preparing a second database in which information on the resin waste corresponds to a chemical decomposition method for the resin waste;
a second decision for determining a chemical decomposition method for the resin waste X1 by checking the information X1 associated with the resin waste X1 against a second database when the first decision has determined that the resin waste X1 is to be recycled;
may include:
According to this aspect, by utilizing the second database prepared in advance, when the resin waste X1 is to be recycled through a chemical decomposition reaction, it is possible to easily determine a chemical decomposition method for the resin waste X1.

The first database and the second database may be formed separately or integrally.

Table 1 below shows an image of the first database and the second database formed integrally.

In the example shown in Table 1, in the first database, information a1 to a3 regarding resin scraps is associated with information "recyclable," and information a4 to a6 regarding resin scraps is associated with information "not recyclable."
For example, a1 to a6 may be information on the properties of the resin contained in the resin waste, similar to the information X1 described above.
The recyclability of each of a1 to a6 is determined in advance based on some viewpoint (for example, a calculated value of a life cycle assessment (LCA)).

In the example shown in Table 1, furthermore, in the second database, the information a1 to a3 indicating "recyclable" is associated with chemical decomposition methods m1 to m3, respectively.
The chemical decomposition method for each of a1 to a3 (that is, chemical decomposition methods m1 to m3) is determined based on, for example, the results of a preliminary experiment.

FIG. 3 is a conceptual diagram showing an example of a processing routine including a first determination.
The processing routine according to this example will be described below.

The processing routine is started, and in step S100, information X1 regarding resin scrap X1 is read out.

Next, in step S102, a first database is read out, which corresponds information about the resin scraps with whether or not the resin scraps are subject to recycling through chemical decomposition reactions.

Next, in step S104, the information X1 associated with the resin scrap X1 is compared with the first database to determine whether or not the resin scrap X1 is to be recycled through a chemical decomposition reaction (first decision).

If it is determined that the resin scrap X1 is to be recycled, the process proceeds to step S106, where the resin scrap X1 is managed as a target for recycling. In this example, the process then proceeds to a processing routine (see FIG. 4) that includes a second determination.

If it is decided that the resin scrap X1 is not eligible for the above-mentioned recycling, proceed to step S108, and manage the resin scrap X1 as not eligible for the above-mentioned recycling (e.g., as waste).

In step S110, if there is the next resin scrap X1 to be subjected to the processing routine, the process returns to step S100, and if there is no next resin scrap X1, the processing routine is terminated.

FIG. 4 is a conceptual diagram showing an example of a processing routine including a second determination.
The processing routine according to this example will be described below.

Proceed from step S106 to step S200, where a second database is read out, which corresponds information regarding resin scraps with methods for chemically decomposing resin scraps.

Next, in step S202, the information X1 associated with the resin waste X1 is compared with the second database to determine a chemical decomposition method for the resin waste X1 (second determination).
The processing routine then ends.

In the resin scrap management method of the present disclosure, the resin molded body is, for example, a resin molded body for manufacturing eyeglass lenses.
According to this embodiment, the resin for eyeglass lenses can be recycled.

[Method of collecting resin scraps]
The method for recovering resin scraps according to the present disclosure includes recovering resin scraps X1 that have been managed by the method for managing resin scraps according to the present disclosure.
The method for recovering resin scraps according to the present disclosure has the same effects as the method for managing resin scraps according to the present disclosure.
Furthermore, the resin waste X1, which is powder produced by processing resin moldings, can be collected in a manner that allows easy determination of the treatment to be performed on the resin waste X1.

[An example of a business model for recycling eyeglass lenses]
The resin scrap management method and the resin scrap recovery method of the present disclosure can be applied to, for example, a business model for recycling eyeglass lenses.
FIG. 5 is a conceptual diagram showing an example of a business model for recycling eyeglass lenses.
The main actors involved in this business model are:
Raw material manufacturers that produce the raw materials (monomers) that are the basis for resin molded bodies used in lens manufacturing;
Lens manufacturers that manufacture resin molded bodies for lens manufacturing and lenses;
Eyeglass retailers who process lenses and sell eyeglasses, and
Examples of such a collector include a collector that collects resin scraps (hereinafter simply referred to as "resin scraps") that are processing scraps (for example, grinding scraps and/or polishing scraps) of resin molded articles for use in lens production. If necessary, other entities may be involved.
The raw material (monomer) in this example is a polythiourethane resin raw material (monomer) for producing a polythiourethane resin, which is the main component of the resin molded body for manufacturing a lens, and specifically, isocyanate (NCO) and thiol (SH).
In this example, resin waste, which is the processed powder of resin molded bodies for lens production, is subjected to a chemical decomposition process to produce thiol (SH) and amine, which is the raw material for isocyanate (NCO). Next, isocyanate is produced from the amine, and the resulting isocyanate (NCO) and thiol (SH) are used as raw materials for new resin molded bodies for lens production.
Resin scraps are powder produced from resin molded products used in lens production, which are generated during the process of grinding and/or polishing the resin molded products used in lens production to obtain lenses, and during the process of further grinding and/or polishing the lenses to turn them into the final product, eyeglass lenses.

The flows of raw materials, lenses, and resin scraps are, for example, as follows: (1) to (6).
(1) Raw materials are shipped from the raw material manufacturer to the lens manufacturer.
(2) Lens manufacturers polymerize the raw materials to produce lenses, which generates resin waste.
(3) An eyeglass retailer processes the manufactured lenses and manufactures eyeglasses,
(4) The glasses are sold to consumers, which generates resin waste.
Resin waste is also generated when eyeglasses are collected from consumers.
(5) The recycling company collects the resin scraps generated in (2) to (4) and delivers them to the raw material manufacturer.
In addition, the raw material manufacturers may collect the lenses directly without going through the collection companies in (5), or the lenses may be collected by eyeglass retailers via lens manufacturers. The collection route can be flexibly determined according to the business design as appropriate.
(6) The raw material manufacturer will disassemble the resin scraps collected in-house or at its subcontractors as necessary and recycle (reuse) the resin scraps.
The decomposition yields recovered products such as amines, thiols, and isocyanates, which are then reused as raw materials for polythiourethane resin.
In the step of producing a polythiourethane resin raw material, for example, a polythiourethane resin is reacted with an amine compound and/or an alcohol compound under predetermined conditions.

In the above example, the recycling of eyeglass lenses made of polythiourethane resin has been described, but a similar business model can also be applied to the recycling of eyeglass lenses made of resins other than polythiourethane resin.
Examples of other resins are as described above as examples of resin in the resin scraps X1.

[Recycling Management System]
The recycle management system of the present disclosure is a recycle management system having a first registration unit, a second registration unit, a third registration unit, and a fourth registration unit.
The first registration unit registers identification information for tracking in association with collection information, which is information on the collected resin waste, which is waste from processing of the resin molded body.
The second registration unit registers the identification information in association with information on a predetermined chemical decomposition method for the resin waste.
The third registration unit registers the identification information in association with decomposition information, which is information on the recycled raw materials obtained by decomposing the resin waste by a chemical decomposition method.
The fourth registration unit registers the identification information in association with reuse information, which is information about products using recycled raw materials.

In the recycle management system disclosed herein, information regarding collected resin scraps, recycled raw materials obtained by reusing the resin scraps, and products using the recycled raw materials is consistently managed using identification information for identifying the collected resin scraps.
As a result, according to the recycle management system of the present disclosure, this information can be managed in a traceable manner.
As a result, the quality of products made using recycled materials can be effectively guaranteed.

In particular, according to the recycle management system of the present disclosure,
Collection of resin waste (i.e. processing waste) generated during the manufacturing process of products (e.g. eyeglass lenses),
Reusing the collected resin waste (i.e., generating recycled raw materials by decomposing the resin waste and manufacturing products using the recycled raw materials);
This ensures traceability of information throughout the recycling process, including the recycling of waste.
An example of the recycling process referred to here is the above-mentioned business model for recycling eyeglass lenses (see FIG. 5).
That is, the recycling management system of the present disclosure can be applied to the above-mentioned eyeglass lens recycling business model (see FIG. 5).

The "resin scraps that are scraps from the processing of resin molded bodies" in the recycling management system of the present disclosure is synonymous with the "resin scraps X1 that are scraps from the processing of resin molded bodies" in the above-mentioned management method of resin scraps of the present disclosure, and the preferred aspects are also the same.
The "resin scraps that are waste from processing of resin molded bodies" in the recycle management system of the present disclosure may be scraps recovered by the resin scrap recovery method of the present disclosure described above.

First Embodiment
(System Configuration)
A recycle management system 100 (see FIG. 6 and others) according to a first embodiment of the recycle management system of the present disclosure will be described.
The recycle management system 100 according to the first embodiment can be configured as a hardware device.

FIG. 6 is a block diagram showing the hardware configuration of the recycle management system 100 according to the first embodiment.
The hardware of the recycle management system 100 is not limited to physical hardware, but may be a cloud server in a virtual environment, or functions may be distributed among multiple servers.

As shown in Fig. 6, the recycle management system 100 has a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a storage 14, an input unit 15, a display unit 16, and a communication interface (I/F) 17. Each component is connected to each other via a bus 19 so as to be able to communicate with each other.

The CPU 11 is a central processing unit that executes various programs and controls each part. That is, the CPU 11 reads a program from the ROM 12 or the storage 14, and executes the program using the RAM 13 as a working area. The CPU 11 controls each of the above components and performs various calculation processes according to the program stored in the ROM 12 or the storage 14. In this embodiment, a position estimation program is stored in the ROM 12 or the storage 14.

The ROM 12 stores various programs and various data.
The RAM 13 serves as a working area for temporarily storing programs or data.
The storage 14 is configured with a storage device such as a hard disk drive (HDD) or a solid state drive (SSD), and stores various programs including an operating system, and various data.

The input unit 15 includes a pointing device such as a mouse and a keyboard, and is used to perform various inputs.

The display unit 16 is, for example, a liquid crystal display, and displays various information. The display unit 16 may be a touch panel type and function as the input unit 15.

The communication interface 17 is an interface for communicating with other devices such as terminals. For this communication, for example, a wired communication standard such as Ethernet (registered trademark) or FDDI, or a wireless communication standard such as 4G, 5G, or Wi-Fi (registered trademark) is used.

Functionally, as shown in FIG. 7, the recycle management system 100 comprises a management information memory unit 102, a first registration unit 110, a second registration unit 112, a third registration unit 114, a fourth registration unit 116, and a search unit 118.
The recycle management system 100 is also connected via a network N to an operation terminal 90 operated by a user.
In addition, the recycle management system 100 may be configured such that each registration unit is distributed over a network. In that case, each registration unit may be connected via the network N.

The registration processes of the first registration unit 110, the second registration unit 112, the third registration unit 114, and the fourth registration unit 116 are registration processes that follow the flow of the recycling process, which includes collection of resin scraps, decomposition of the resin scraps (i.e., generation of recycled raw materials), analysis after decomposition (i.e., analysis of the recycled raw materials), and manufacture of products using the recycled raw materials and analysis of the products. Furthermore, each registration is an example, and other registration processes may be performed as necessary.

The management information memory unit 102 stores first registration information registered by the first registration unit 110, second registration information registered by the second registration unit 112, third registration information registered by the third registration unit 114, and fourth registration information registered by the fourth registration unit 116.
When a user performs a registration operation from the operation terminal 90, each piece of registration information is registered by each registration unit. When a user performs a search operation from the operation terminal 90, the search unit 118 performs a search based on a search key and displays the search results. Note that the user is assumed to be a person in charge of one of a number of business entities involved in the recycling process. For example, the user of the first registration unit 110 is assumed to be a person in charge of a raw material manufacturer, and the user of the fourth registration unit 116 is assumed to be a person in charge of a lens manufacturer or an eyeglass retailer.
Each registration section and each piece of registered information will be described in detail below.

The first registration unit 110 associates the identification information with the collection information and registers them in the management information storage unit 102 as first registration information.
The first registration information is registered by the first registration unit 110 in response to a registration operation by the user.

The identification information is used to consistently manage and track the collected resin waste.
As the identification information, for example, an identification ID is used.
The identification information is information for uniquely identifying the collected resin scraps in each of the registrations in the first registration unit 110, the second registration unit 112, the third registration unit 114, and the fourth registration unit 116. By using this identification information as a reference key, it becomes possible to track the information in the recycling process.
The identification information (e.g., an identification ID) may be set to be automatically assigned when the collected resin scraps are registered, or may be set to be assigned arbitrarily by the user. Also, the resin scraps may be collected after being assigned with the identification information in advance at the time of collection, etc. In this case, the collector or the collector may register the resin scraps.
The reason why the entity performing the registration operation in the first registration unit 110 may be fluid in this way is that it is assumed that the entity responsible for registering the first registration information will differ depending on the recycling business scheme. The identification of the resin scraps during collection is assumed to be, for example, at the time of edging, semi-cutting, polishing, etc.
In addition to the identification ID, a registration ID for registration may be assigned when the first registration unit 110, the second registration unit 112, the third registration unit 114, and the fourth registration unit 116 are registered.
The identification information may be managed using a blockchain, which will be described later in another embodiment.

The collection information is information related to collected resin scraps (i.e., resin scraps that are scraps produced from the processing of resin molded bodies).
There are no particular limitations on the collection information, and the collection information may be designed appropriately according to the recycling process.
The collection information may be obtained in advance from a collection company or a collection source when the resin scraps are collected, and the collected collection information may be registered by manually or automatically inputting the collected collection information, for example.

The collection information may be information similar to the "information X1 regarding resin scraps X1, which are processing scraps of resin moldings" in the resin scrap management method disclosed hereinabove.

It is preferable that the recycling information includes at least one of the following: information on the properties of the resin scraps, product information before processing, and information on the source of recycling.

First, the property information regarding the resin scraps that may be included in the collection information will be described below.
Depending on the property information on the resin waste, at least one of the following may differ: whether it can be reused, the reusable ratio, and the required chemical decomposition method.
Therefore, when the collection information includes property information regarding the resin scraps, it becomes easier to determine at least one of whether the collected resin scraps can be reused, the reusable ratio, and the chemical decomposition method.
The property information regarding the resin scraps may be, for example,
(1) moisture and specific gravity; (2) the type and amount of resin contained; and (3) the type and amount of components other than resin contained (e.g., abrasives, surfactants, acids, alkalis, etc.).

Furthermore, the property information regarding the resin scraps includes information on whether the resin scraps are eligible for reuse, and information on specific components that can determine whether the resin scraps are eligible for reuse.
The specific component referred to here includes, for example, an isotope element.
It is assumed that the specific component is contained in advance, for example, in a raw material (monomer) for forming the resin in the resin scraps. In this case, the specific component can be detected by analyzing the components of the resin scraps after collection.
The above-mentioned method of incorporating a specific component in advance into the raw material (monomer) for forming the resin in the resin waste is effective as a method for ensuring the traceability of information in the recycling process.

Whether or not the resin scraps are eligible for recycling may be determined for each product manufactured when the resin scraps are generated. For example, a product manufactured by polymerizing a raw material (monomer) from which it is difficult to obtain a reusable raw material by chemical decomposition of the resin scraps is determined to be non-reusable, whereas a product manufactured by polymerizing a raw material (monomer) from which it is possible to obtain a reusable raw material by chemical decomposition of the resin scraps is determined to be reusable.
Also, only resin wastes that have been determined in advance may be collected based on whether they can be reused. In this case, the recycle management system 100 may determine in advance which resin wastes are to be collected based on whether they can be reused, and may notify the collection company or the like of the wastes to be collected in advance.

Next, the unprocessed product information that may be included in the recovery information will be described.
For example, product information before processing:
Information on the product (i.e., raw material (monomer)) for producing the resin molded body before processing;
Information on products (e.g., eyeglass lenses) manufactured when resin waste is generated from the processing of resin moldings;
etc.
In addition, if the property information cannot be obtained at the time of recovery, the property information may be determined from the product information before processing by referring to a property information database (not shown) held by the raw material manufacturer, and the property information may then be registered.

Next, information on the collection source that may be included in the collection information will be described.
The information on the source of collection may include information on the lens manufacturer and information on the eyeglass retailer. The information on the source of collection may be at least identification information that can identify the lens manufacturer or eyeglass retailer that is the source of collection.
The information on the collection source may include history information on the lens manufacturing process or history information on the lens processing process, which makes it possible to trace the manufacturing and sales routes through which the recycled product was collected.

FIG. 8 shows an example of the first registration information.
As the first registration information (R1), the identification information and the collection information are registered in association with each other.
Although not shown in the figure, the registration information may be provided with a registration date and time. The same applies to the following registration information.

The second registration unit 112 associates the identification information with information regarding a predetermined chemical decomposition method for the resin scraps and registers it in the management information storage unit 102 as second registration information.

The information on the predetermined chemical decomposition method for the resin waste is information on which chemical decomposition method is to be used for decomposition, which is predetermined for each type of resin waste.
The chemical decomposition method varies depending on the type of resin waste (eg, the type of resin contained therein).
In this embodiment, therefore, a chemical decomposition method is determined in advance for each type of resin waste. The chemical decomposition method may be determined with reference to the application standard of LCA (Life Cycle Assessment).
The second registration unit registers, for example, information about a predetermined chemical decomposition method (e.g., which chemical decomposition method is used for decomposition or whether decomposition has been performed) for the collected resin scraps in association with their identification information. This makes it easy to track the chemical decomposition method used for decomposition of recycled raw materials obtained by decomposing the resin scraps and products manufactured using the recycled raw materials.

FIG. 9 shows an example of the second registration information.
As the second registration information (R2), the identification information and the type of decomposition method, which is information related to the chemical decomposition method, are registered in association with each other.

The third registration unit 114 associates the identification information with decomposition information, which is information regarding the components of the recycled raw materials obtained by decomposing the resin scraps using a chemical decomposition method, and registers the association information in the management information storage unit 102 as the third registration information.

The decomposition information is information on the recycled raw materials obtained by decomposing the resin waste.
The decomposition information preferably includes the results of an analysis of the content of impurities (i.e., trace components among components other than the main components) in the recycled raw material.
The recycled raw material obtained by decomposing the resin scraps may have a different impurity content compared to the raw material before being recycled (i.e., the raw material used to form the resin in the resin scraps). Therefore, the recycled raw material and the raw material before being recycled may have significantly different resin properties when the resin is formed due to the difference in the impurity content. For this reason, it is expected that the recycled raw material and the raw material before being recycled are mixed and used to manufacture a product. In this case, decomposition information (e.g., the result of analyzing the content of impurities in the recycled raw material) may be effective as an index for determining the mixing ratio of the recycled raw material and the raw material before being recycled.
As will be described in detail later, the decomposition information may include information on the success or failure of the decomposition.

FIG. 10 shows an example of the third registration information.
In the upper example of Figure 10, the identification information and the content of impurities (components A and B) in the recycled raw material as decomposition information are registered in association with each other as the third registration information (R3).
The example in the lower part of Fig. 10 shows an example in which, when multiple recyclable materials are mixed and used, the identification information associated with each of the multiple recyclable materials is integrated and managed. In this case, a new integrated identification information that integrates the multiple identification information may be assigned.

The fourth registration unit 116 associates the identification information with reuse information, which is information regarding products using recycled raw materials, and registers it in the management information storage unit 102 as the fourth registration information.

Recycle information is information about products that use recycled materials.
The reuse information preferably includes an environmental friendliness evaluation value calculated from the proportion of reused materials used in the product (i.e., the proportion of reused materials used in the total amount of materials used in the production of the product).
Examples of the evaluation value of environmental consideration include LCA calculation values (i.e., life cycle assignment calculation values), CO2 credits, and the like.
The evaluation value of environmental consideration (for example, LCA calculation value and CO2 credit) may be calculated from the usage ratio of the above-mentioned recycled raw materials using a calculation formula defined in advance.

In addition, in the recycle management system 100, a database (not shown) in which information on resin scraps and application criteria for chemical decomposition methods are associated with each other may be provided in the management information storage unit 102, and the application criteria for chemical decomposition methods may be changed based on the evaluation value. The application criteria for chemical decomposition methods may be, for example, application criteria determined by LCA.

FIG. 11 shows an example of the fourth registration information.
In this example, a table (R4-1) of a list of reuse destinations and a table (R4-2) of reuse information for each product are registered as fourth registration information (R4) in the management information storage unit 102.
The table (R4-1) listing reuse destinations records the identification information of the resin scraps at the time of collection and the ID of the product manufactured using the recycled raw materials (hereinafter referred to as the "product ID" or "product identification information") in association with each other.
In the table (R4-2) of reuse information for each product, product identification information for each product and identification information at the time of recovery of the resin waste are recorded in association with each other.
In addition, if the integrated identification information has already been assigned, the integrated identification information and the product identification information may be recorded in association with each other.

The search unit 118 accepts a search key input by a user's search operation on the operation terminal 90, searches for associated information according to the search method of the search key, and presents the search results on the operation terminal 90 in a display format according to the search key.
As a search key, for example, at least one of identification information, recovery information, information on a chemical decomposition method, decomposition information, and reuse information can be used.
In addition, the search key is

Next, an example of displaying the search results will be given.
FIG. 12 is an example of a search interface.
In this example, at least one of the identification ID as identification information, recovery information, chemical decomposition method, decomposition information, and reuse information is used as a search key, and a search can be performed by selecting the box or entering the at least one piece of information as text.
A payback period may also be specified.
The identification information is entered in the input box for the identification ID.
The recall information is entered by selecting a box or entering text for at least one of the property information, the product information before processing, and the recall source.
The decomposition information may include information on the success or failure of the decomposition (not shown), and a search may be performed using a search key narrowed down by success or failure.
The reuse information is entered by selecting a box or entering text, at least one of the percentage of reused raw materials used, the LCA calculation value, and the CO2 credit.

FIG. 13 shows an example of a search result when a search is performed using identification information as a search key.
In this example, a search is accepted using the identification information as a search key, and information associated with the identification information in the management information storage unit 102 is referenced.
As a search result, a list of collection information, chemical decomposition methods, decomposition information, reuse information, and products related to the identification information is displayed.
In this manner, the search unit 118 performs a search and presents the search results to the user.

Furthermore, when a search is received using failure of decomposition information as a search key, identification information associated with the decomposition information including the failure of decomposition is obtained from the management information storage unit 102. Then, the identification information is presented together with recovery information, information on the chemical decomposition method, decomposition information, and reuse information that are registered in association with the identification information. This allows the user to refer to information in the event of failure.
In addition, statistical data for failures and successes may be calculated by referring to information when success is used as the search key, and the results of statistical data comparing the cases of failure and success may be presented.

In addition, when a search is received using a product (product ID) made from recycled materials as a search key, identification information associated with the product made from recycled materials is obtained from the management information storage unit 102. Then, the identification information is presented together with recovery information, information on chemical decomposition methods, decomposition information, and reuse information that are registered in association with the identification information.

[System Operation]
Next, the operation of the recycle management system 100 will be described with reference to Figures 14 and 15. The CPU 11 reads out a program from the ROM 12 or storage 14, expands it into the RAM 13, and executes it, whereby the CPU 11 functions as each part of the recycle management system 100 and performs the following processes. The processes are divided into a registration process and a search process.

The registration processing routine in Figure 14 is explained.

In step S100, the first registration unit 110 issues unique identification information for the collected resin scraps.

In step S102, the first registration unit 110 associates the issued identification information with the collection information and registers them in the management information storage unit 102 as first registration information.

In step S104, the second registration unit 112 associates the identification information with information regarding a predetermined chemical decomposition method for the resin scraps and registers them in the management information storage unit 102 as second registration information.

In step S106, the third registration unit 114 associates the identification information with decomposition information regarding the components of the recycled raw materials obtained by decomposing the resin scraps using a chemical decomposition method, and registers them in the management information storage unit 102 as third registration information.

In step S108, the fourth registration unit 116 associates the identification information with the reuse information, which is information about products using recycled raw materials, and registers it in the management information storage unit 102 as the fourth registration information.

The search processing routine in Figure 15 is explained.

In step S200, the search unit 118 accepts input of a search key via a search operation on the user's operation terminal 90.

In step S202, the search unit 118 obtains search results by referring to each registered information in the management information storage unit 102 based on the search key.

In step S204, the search unit 118 presents the obtained search results on the operation terminal 90 in a display format corresponding to the search key.

As described above, in the recycle management system 100 according to this embodiment, information on the collected resin scraps, the recycled raw materials obtained by reusing the resin scraps, and the products using the recycled raw materials is managed consistently using identification information for identifying the collected resin scraps. This allows this information to be managed in a traceable manner.

Second Embodiment
A second embodiment of the recycle management system of the present disclosure is an aspect in which a blockchain is used for identification information.
FIG. 16 is a diagram illustrating an example of management of registration processing by a blockchain.
Each registration of each part of the recycle management system 100 is recorded in a blockchain represented by a series of blocks indicating each step of the registration, and the hash value calculated in the previous block is recorded as identification information.

A specific example of registration processing using a blockchain will be described.
In the registration process using blockchain, the creation of a block, the calculation of a hash value (identification address), and the registration of registration information are executed as a series of processes (transactions).
In this embodiment, an identification address based on a hash value is used.
The identification address can be generated as an address of several tens of digits including a hash value (e.g., alphanumeric characters such as "0x0ab . . . AZ0"), and uniquely identifies the registration process.
Each registration unit calculates an identification address (hash value) at the time of registration, and generates an identification address for each registration.
The block includes:
(1) the identification address of the previous block,
(2) Information specific to the registration (recovery information, information on chemical decomposition methods, decomposition information, or reuse information);
(3) the identification address calculated for that block;
is recorded as registration information.
For example, the first registration unit creates a first block for the collected resin scraps, calculates a first identification address, and records the first identification address and collection information in the first block as first registration information, completing the registration process.
The second registration unit 112 obtains the first identification address, creates a second block, and calculates the second identification address.
The first identification address (the identification address of the previous block) and the second identification address are recorded in the second block as second registration information, and the registration process is completed.
The registration process by the blocks of the third registration unit 114 and the fourth registration unit 116 is similar.

By calculating and using the identification information as an identification address using a hash value in the above manner, it is possible to manage information during the recycling process on the blockchain.
By tracing the identification addresses, it becomes possible to trace the recycled raw materials and the products made from the recycled raw materials (hereinafter also referred to as recycled products) in the recycling process.
Since each registration block is recorded on the blockchain, traceability can be guaranteed.
Additionally, the authenticity of the registered information can be guaranteed because the blockchain allows registration information to be managed as irreversible, tamper-proof accumulated data.

Alternatively, a block corresponding to the collected resin scraps may be created and a unique management identification address may be issued. In this case, for example, when the management identification address is input into a search box in the search unit 118, all the registration information of each block included in the management identification address is acquired. Then, a list of registration information is displayed for each block, showing how the collected resin scraps were processed and registered in the recycling process.
As an example, in the display example of the search results in FIG. 13, the search results may be displayed together with the identification address of each block.
Also, for example, an identification address of a daily block for collectively managing all the resin scraps collected on that day may be issued and managed. In this case, the identification address corresponding to each of the resin scraps collected on that day may be recorded in the daily block.
Furthermore, when a reused product is completed, a block including some or all of the first to fourth registered information may be created.
In this way, by creating and managing a block that groups together multiple pieces of identification information or multiple pieces of registration information, it is possible to easily refer to the block when any evidence arises in a reused product.

In addition, in the registration process for each block, some important information, for example, information on a specific component, may be embedded in the registration information for each block.
This makes it possible to easily grasp, by simply referring to the registered information for one block, which resin waste or recycled raw material contains which specific component is being used in the recycling process.

In addition, the recycle management system 100 may utilize blockchain technology to use the LCA value or CO2 credits of the product's reuse information as an environmental evaluation value, and issue a Non-Fungible Token (NFT) to certify the environmental evaluation value.
The NFT may be, for example, a badge according to the rank of the environmental evaluation value. The NFT issued in this way may be given to a user who purchases a recycled product. This allows added value based on the environmental evaluation to be given to the purchase and use of the recycled product.

Above, the embodiment of the recycling management system disclosed herein has been described as an embodiment in which the program is pre-installed, but it is also possible to provide the program by storing it on a computer-readable recording medium.

The disclosures of Japanese Patent Application No. 2021-108688, filed on June 30, 2021, and Japanese Patent Application No. 2021-108689, filed on June 30, 2021, are incorporated by reference in their entirety into this specification.
All publications, patent applications, and standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or standard was specifically and individually indicated to be incorporated by reference.

Claims (15)

1. A method for managing waste resin implemented by a processor, comprising:
Managing resin scraps X1, which are scraps from processing of a resin molded body, in association with information X1 regarding the resin scraps X1 ;
a first decision for determining whether or not the resin scrap X1 is to be recycled by checking a first database in which information on the resin scraps is associated with whether or not the resin scraps are to be recycled by chemical decomposition reaction, and the information X1 associated with the resin scraps X1;
a second decision to determine a chemical decomposition method for the resin scrap X1 by checking a second database in which information on the resin scrap and a chemical decomposition method for the resin scrap are associated with each other and the information X1 associated with the resin scrap X1 when the first decision has been made to make the resin scrap X1 a target for recycling;
Including,
The information X1 is property information of the resin scrap X1,
The management includes at least one of managing the resin scrap X1 in a container, providing the information X1 to the container, and making the resin scrap X1 contain a component corresponding to the information X1.
How to manage resin waste. The first decision is made based on a calculated value of a life cycle assessment, and when the calculated value is equal to or greater than a predetermined value, it is decided that the resin scrap X1 is to be the target of the recycling, and when the calculated value is less than the predetermined value, it is decided that the resin scrap X1 is not to be the target of the recycling.
The method for managing resin scraps according to claim 1 . The information X1 includes information regarding the type of resin in the resin scrap X1,
The method for managing resin scraps according to claim 1 . The resin molded body is a resin molded body for manufacturing eyeglass lenses.
The method for managing resin waste according to claim 3 . A method for recovering resin scraps, comprising recovering the resin scraps X1 managed by the method for managing resin scraps according to claim 1 . A recycle management system having a first registration unit, a second registration unit, a third registration unit, and a fourth registration unit,
The first registration unit registers identification information for tracking and collection information, which is information about the collected resin waste, which is processing waste of the resin molded body, in association with each other;
The second registration unit registers the identification information and information regarding a predetermined chemical decomposition method for the resin scrap in association with each other,
The third registration unit registers the identification information in association with decomposition information, which is information about recycled raw materials obtained by decomposing the resin scraps using the chemical decomposition method;
The fourth registration unit registers the identification information and reuse information, which is information about a product using the recycled raw materials, in association with each other.
Recycling management system. The recycle management system according to claim 6 , wherein the collection information includes at least one of property information about the resin scraps, product information before processing, and information about a collection source. The recycle management system according to claim 7 , wherein the property information includes information on a specific component that can determine that the resin scrap is a target for reuse. The recycle management system according to any one of claims 6 to 8, wherein each registration of each part is recorded in a block chain represented by a series of blocks indicating each step of the registration, and a hash value calculated in the previous block is recorded as the identification information. The decomposition information includes an analysis result of the content of impurities in the recycled raw material.
The recycle management system according to any one of claims 6 to 8 . The reuse information includes an environmental friendliness evaluation value calculated from the usage ratio of the reused raw materials in the product.
The recycle management system according to any one of claims 6 to 8 . a database in which information on the resin scraps is associated with application standards for the chemical decomposition method;
changing an application criterion for the chemical decomposition method based on the evaluation value;
The recycle management system according to claim 11 . accepting a search using at least one of the identification information, the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information as a search key;
presenting, as a search result, identification information associated with the information corresponding to the search key, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information registered in association with the identification information;
The recycle management system according to any one of claims 6 to 8 . The decomposition information includes information on success or failure of the decomposition,
Accepts searches using failure as a search key,
presenting the identification information associated with the decomposition information including the failure of decomposition, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information registered in association with the identification information;
The recycle management system according to any one of claims 6 to 8 . Accepting a search using the product using the recycled raw materials as a search key,
presenting, as a search result, identification information associated with the reuse information corresponding to the product that matches the search key, together with the recovery information, the information on the chemical decomposition method, the decomposition information, and the reuse information that are registered in association with the identification information;
The recycle management system according to any one of claims 6 to 8 .