Method for processing recycled resin materials and molded articles

Abstract

This technology makes it easier to impart desired physical properties to recycled resin materials and contributes to improving the manufacturing efficiency of molded articles made from such recycled resin materials. [Solution] The recycled resin material is processed by a processing method comprising a spraying step of spraying a CNF dispersion onto a recycled resin material obtained by micronizing a molded product made of resin, and a drying step of drying the recycled resin material after the spraying step. Furthermore, the processed recycled resin material is molded to create a desired molded body (recycled product).

Description

Technical Field

[0001] The present invention relates to a method for processing (preparing) a recycled resin material using cellulose nanofibers and a molded body.

Background Art

[0002] In various products made of resin materials and the like, it is required to contribute to global environmental protection, and various recycling laws (such as the Container and Packaging Recycling Law) have been established. For example, instead of simply creating products using virgin materials, it is desired to create recycled products (i.e., remanufacture, etc.) by appropriately using recycled materials, and various research and developments have been carried out so that desired characteristics can be imparted to such recycled products.

[0003] As an example of recycled materials, for example, recycled resin materials obtained by miniaturizing (crushing, pulverizing, etc.) molded products such as separately collected resin containers and packaging (for example, products with a recycling mark) can be mentioned.

[0004] Although such recycled resin materials have begun to be applied to various recycled products, desired physical properties (such as high mechanical strength, etc.) are often not obtained. For this reason, research and development of processing technologies for reinforcing recycled resin materials have also been carried out, but it is difficult to apply them to actual recycled products, and there is no product that has reached industrial production level.

[0005] In the virgin material field, which is different from the recycled material field, some processing technologies for enhancing the physical properties of the virgin material are known. For example, Patent Document 1 discloses a processing method using a reinforcing filler such as cellulose nanofibers obtained by the underwater counter-collision method (Patent Document 3).

[0006] In this processing method, first, resin particles are immersed in a dispersion liquid (hereinafter simply referred to as CNF dispersion liquid) made by dispersing cellulose nanofibers (hereinafter simply referred to as CNF as appropriate) in a solvent (for example, water and / or organic solvents, etc.) and shaken in a coating step to coat the surface of the resin particles by adsorbing (adhering) CNF (Patent Document 2). Then, the resin particles that have undergone the coating step are subjected to processing by a plurality of steps (solid-liquid separation (dehydration) step, drying step, pre-molding step, compounding step, molding step, etc.) to create a nanocomposite material (a composite material having a honeycomb-like three-dimensional structure) that is given desired physical properties (mechanical strength, elastic modulus, impact resistance, etc.).

[0007] CNF is a reinforcing filler that can be obtained from various plants, for example, and is also biodegradable, so it is beginning to attract significant attention and expectations as a renewable (carbon neutral) material. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Patent No. 6979083 [Patent Document 2] Patent No. 5690387 [Patent Document 3] Japanese Patent Publication No. 2005-270891 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] In the processing method described in Patent Document 1, the material to be processed (the material to be coated with CNF) is preferably a virgin material with relatively small particle size (for example, particle size at the level of several μm), and its composition and shape are uniform (including substantially uniform) depending on the type of virgin material.

[0010] On the other hand, recycled resin materials often come in relatively large shapes (for example, flakes, pellets, or powders with an outer diameter of several centimeters), and their composition and shape are often non-uniform. For this reason, it was thought that simply applying the processing method described in Patent Document 1 would not allow for the desired coating of CNF onto the recycled resin material (especially since the amount of CNF coating would not reach the required amount), making it difficult to obtain the desired physical properties.

[0011] For example, in the case of recycled resin materials, if the components are made nearly uniform and / or refined into relatively small particle shapes by strictly carrying out pre-processing steps (separation collection, removal of foreign matter, etc.) before the coating process with CNF, it may be possible to impart the desired physical properties by applying the processing method described in Patent Document 1.

[0012] However, the processing method described in Patent Document 1 requires many processing steps after the CNF coating step, and if steps for homogenizing and refining the components are performed as described above, it may lead to an increase in the number of steps and higher costs.

[0013] Therefore, even if the processing method described in Patent Document 1 can impart the desired physical properties to the recycled resin material, the manufacturing efficiency of recycled products using that recycled resin material may be low, making it difficult to commercialize at an industrial production level.

[0014] The present invention has been made in view of the aforementioned technical problems, and aims to provide a technology (a method for processing recycled resin materials and a molded article) that can contribute to making it easier to impart desired physical properties to recycled resin materials and to improving the manufacturing efficiency of molded articles made by molding said recycled resin materials. [Means for solving the problem]

[0015] The processing method and molded article of the recycled resin material according to this invention are creations that can solve the above problems. One aspect of the processing method of the recycled resin material is a spraying step of spraying a dispersion liquid in which cellulose nanofibers are dispersed onto the recycled resin material obtained by miniaturizing a molded article made of resin, and a drying step of drying the recycled resin material that has undergone the spraying step, and is characterized by having these steps.

[0016] The dispersion liquid may be characterized in that the concentration of cellulose nanofibers is less than 1 wt%. Further, the dispersion liquid may be characterized in that the concentration of cellulose nanofibers is within the range of 1×10 -4 wt% to 1×10 -1 wt%.

[0017] The recycled resin material may be characterized in that the maximum outer diameter is 5 cm or less. Further, the molded article may be characterized in that it is made of an olefin resin.

[0018] The spraying step uses a conveyor having a placement surface on which the recycled resin material can be placed and capable of moving the recycled resin material in the horizontal direction, and a spray nozzle disposed opposite to the placement surface and capable of spraying the dispersion liquid, and sprays the dispersion liquid onto the recycled resin material placed on the placement surface using the spray nozzle, and may be characterized by this. Further, the conveyor may be characterized by being a vibrating conveyor.

[0019] One aspect of the molded article is characterized by being formed by molding the recycled resin material processed by any of the processing methods of the recycled resin material.

Effects of the Invention

[0020] According to the present invention, it becomes possible to contribute to making it easier to impart desired physical properties to the recycled resin material and to improving the manufacturing efficiency of the molded article formed by molding the recycled resin material.

Brief Description of the Drawings

[0021] [Figure 1] Schematic explanatory diagram of the spraying system 1 applicable in the spraying process of the embodiment.

Mode for Carrying Out the Invention

[0022] The processing method and molded body of the recycled resin material according to the embodiment of the present invention are completely different from the configuration using, for example, simply the processing method shown in Patent Document 1 (hereinafter, appropriately referred to as the conventional processing method).

[0023] That is, in the present embodiment, a spraying process of spraying a CNF dispersion liquid onto a recycled resin material obtained by miniaturizing a molded product made of resin, and a drying process of drying the recycled resin material that has undergone the spraying process are used to process the recycled resin material. Further, the processed recycled resin material is molded to create a desired molded body (recycled product).

[0024] According to such a present embodiment, even if the recycled resin material to be processed has a relatively large shape (for example, flakes, pellets, powders, etc. with an outer diameter on the order of several cm), and its components and shape are non-uniform, it is possible to sufficiently adhere and coat CNF to the recycled resin material, and it is easy to obtain desired physical properties.

[0025] For example, although olefin resins such as polypropylene and polyethylene are non-polar and tend to have relatively strong hydrophobicity, according to the present embodiment, it is also possible to adhere and coat CNF to the recycled resin material containing the olefin resin, and it is possible to obtain desired physical properties.

[0026] Furthermore, while conventional processing methods require numerous processing steps after the CNF coating process, the configuration of this embodiment allows for the appropriate omission of steps (for example, omitting solid-liquid separation steps, compounding steps, etc.) to obtain the desired molded product (recycled product). This contributes to improving the manufacturing efficiency of the molded product (reduced man-hours, lower costs, etc.) and makes it easier to commercialize at an industrial production level.

[0027] The recycled resin material processing method and molded article of this embodiment only need to be configured by processing the recycled resin material using a processing method that includes the spraying and drying steps described above, and a variety of design modifications are possible. That is, it is possible to appropriately apply common technical knowledge from various fields (e.g., CNF field, recycling field, spraying field, molding field, etc.) and modify the design as needed by referring to prior art documents, etc. The following embodiment is an example of such modification.

[0028] In the following embodiments, detailed explanations are omitted as appropriate, for example, by referring to the same reference numerals for similar content.

[0029] Examples <An example of recycled resin material> The recycled resin material that is the target of the spraying process (i.e., the object to be processed) can be any material that can be coated with CNF by spraying a CNF dispersion, and various embodiments can be applied (Patent Document 2).

[0030] For example, in the recycling field, generally, those obtained by pulverizing (such as crushing, grinding, pulverizing, etc.) molded products made of resin, such as containers and packaging separately collected (for example, products with recycling marks), can be mentioned. In such resin molded products, one or more resins from a group of resins such as siloxane, polytetrafluoroethylene (PTFE), polypropylene (PP), polyvinylidene fluoride (PVDF), low-density polyethylene (LDPE), high-density polyethylene (HDPE), polyvinyl acetate (PVAc), polyvinyl alcohol (PVA), polyhydroxyethyl methacrylate (PHEMA), polyvinyl fluoride (PVF), polyimide (PI), polystyrene (PS), polymethyl acrylate (PMA), acrylic resin (PMMA), polyvinyl chloride (PVC), polybutadiene (PB), polyethylene glycol (PEG), polyethylene terephthalate (PET), polycarbonate (PC), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), polyacrylamide (PAAM), polylactic acid (PLA), etc. are used, and in addition, those obtained by appropriately adding various additives to the resin can also be mentioned.

[0031] Examples of the shape of the recycled resin material refined as described above include flake-like, pellet-like, powder-like, etc. with an outer diameter in the order of several cm. However, considering the handling property of the recycled resin material, the adhesion of CNF when the CNF dispersion is sprayed, and the molding property of the molded body using the recycled resin material, etc., it is preferable to appropriately refine the outer diameter of the recycled resin material to be about 5 cm or less.

[0032] Also, in the recycled resin material, its surface may be contaminated or foreign substances may be mixed. If necessary, cleaning processes and sorting processes (such as sorting using a vibration sorter, a pneumatic separator, an optical sorter, a magnetic separator, etc.) can be appropriately carried out.

[0033] <An example of the CNF dispersion> The CNF dispersion is prepared by dispersing CNF in a solvent (e.g., water and / or an organic solvent), and can be applied in various forms by spraying it onto a recycled resin material using, for example, a spray nozzle, to coat it.

[0034] For example, when spraying a CNF dispersion using a spray nozzle as described above, the CNF concentration in the dispersion should be appropriately set so that the spraying is not hindered (e.g., clogging of the spray nozzle). An example of such a CNF concentration is to set it to less than 1 wt%, preferably 1 × 10⁻⁶. -1 wt% or less (e.g., 1 × 10) -2 wt%~1×10 -4 One example is setting it within the wt% range.

[0035] CNF can be derived from polysaccharides found in natural plants, such as wood fibers, bamboo fibers, sugarcane fibers, seed hair fibers, and leaf fibers. The CNF may be used alone or in combination of two or more types.

[0036] CNF can be obtained by appropriately defibrating the aforementioned polysaccharides by applying a defibration method such as the underwater counter-collision method (aqueous counter-collision method; hereinafter simply referred to as the ACC method) disclosed in Patent Documents 1 to 3.

[0037] According to the ACC method described above, nano-fiberization can be achieved by cleaving only the interactions between cellulose fibers, thereby suppressing structural changes of cellulose molecules in CNF. Furthermore, it is possible to pulverize the average particle length of cellulose fibers to less than 1 / 4 or to 10 μm, resulting in the acquisition of CNF with, for example, an average thickness (diameter) of 4 to 200 nm and an average length of 0.1 μm or more (e.g., 100 nm to 500 nm). On the other hand, in the case of the ACC method, the energy applied to the cellulose fibers during defibrillation does not reach the energy required to cleave covalent bonds (for example, it is estimated to be less than 1 / 300 of the energy required to cleave such covalent bonds), and the degree of polymerization of cellulose can be sufficiently suppressed to prevent a decrease. The CNF obtained in this way will have both hydrophilic and hydrophobic sites, exhibiting amphiphilic properties.

[0038] Furthermore, in addition to CNF, various additives may be appropriately blended in the CNF dispersion depending on the purpose. For example, examples of additives aimed at enhancing the functionality of recycled resin materials include known dyes, pigments, fillers, flame retardants to make flammable resins less flammable, mold release agents, polymer stabilizers such as antioxidants for improving durability, clarifiers, plasticizers to impart flexibility, antistatic agents to eliminate the harmful effects of static electricity, lubricants to improve lubricity, weather resistance improvers to suppress UV adsorption, metal deactivators to prevent oxidative degradation by metals, and additives to improve stability during processing.

[0039] Furthermore, compounds having carboxyl groups can be used as additives to enhance the functionality of the CNF skeleton. Specifically, known cellulose derivatives having carboxyl groups, such as carboxymethylcellulose (CMC), can be given as examples.

[0040] Other known wet-strengthening agents include polyamide-polyamine / epichlorohydrin systems, melamine / formaldehyde systems, and urea / formaldehyde systems.

[0041] Furthermore, the CNF dispersion may undergo a redispersion process (for example, a process of defibration by a similar ACC method) as needed before or during the spraying process (one or more times). Performing this redispersion process as needed makes it easier to suppress issues such as nozzle clogging of the spray nozzle 3, as described later.

[0042] <An example of a spraying system> In the spraying process, various devices can be appropriately applied to spray the CNF dispersion. One example of this is the application of spraying system 1 shown in Figure 1.

[0043] The spraying system 1 in Figure 1 includes a conveyor 2 that has a mounting surface (shown in Figure 1 as the upper side of the conveyor belt 22 described later) 2a on which recycled resin material M can be placed, and which allows the recycled resin material M placed on the mounting surface 2a to move horizontally (as shown by the white arrows in Figure 1), and a spray nozzle 3 that is positioned at a predetermined distance from the mounting surface 2a in a direction opposite to the mounting surface 2a (directly above the center of the mounting surface 2a in Figure 1) and is capable of spraying CNF dispersion liquid.

[0044] In the case of conveyor 2 in Figure 1, the belt conveyor is composed of multiple (two in Figure 1) rotating rollers 21 arranged at predetermined intervals in the horizontal direction, and an annular conveyor belt 22 that is wrapped around the rotating rollers 21 in a horizontally extended state.

[0045] The spray nozzle 3 is connected to, for example, a container (not shown) capable of containing a CNF dispersion, and a control device (not shown) capable of controlling the spray by appropriately setting the spray conditions of the CNF dispersion (e.g., cylinder pressure, CNF dispersion liquid pressure, spray pressure, etc.), so that the CNF dispersion can be sprayed as needed.

[0046] As mentioned above, the spray nozzle 3 only needs to be able to appropriately spray the CNF dispersion (for example, spray from the tip (spray opening) of the spray nozzle 3 as shown by the dashed line in Figure 1), and various configurations can be applied. One example is a configuration that allows spraying in a multiphase manner (for example, a three-phase manner by combining one liquid supply channel and two air supply channels) by combining a liquid supply channel for delivering the CNF dispersion and an air supply channel for supplying the air necessary to spray the CNF dispersion delivered through the liquid supply channel. In addition, the spray nozzle 3 may be applied as a single unit, or multiple units may be applied as appropriate (for example, arranged at predetermined intervals along the mounting surface 2a).

[0047] Furthermore, the spray direction of the spray nozzle 3 (for example, the angle with respect to the mounting surface 2a) and the spray range can be appropriately set according to, for example, the shape of the conveyor belt 22 (area, shape, etc. of the mounting surface 2a) and the amount of recycled resin material M to be placed on it.

[0048] In Figure 1, the hood 4 is provided so as to surround (as shown by the dashed line in Figure 1) the outer circumference of the portion of the mounting surface 2a facing the spray nozzle 3 and the outer circumference of the spray nozzle 3. By providing the hood 4 in this way, it is possible to suppress the scattering of the CNF dispersion liquid sprayed from the spray nozzle 3 in unintended directions, and also to suppress the scattering of the recycled resin material M.

[0049] In the spraying system 1 described above, for example, first, the conveyor belt 22 is rotated circumferentially via the rotating roller 21, and the recycled resin material M is sequentially placed (distributed so as not to overlap) on one end (upstream side) 2b of the mounting surface 2a of the conveyor belt 22, and then moved to the other side (downstream side) 2c of the mounting surface 2a. Then, the CNF dispersion is sprayed through the spray nozzle 3 onto the recycled resin material M that has moved to the point on the mounting surface 2a facing the spray nozzle 3. This allows the recycled resin material M to be coated with CNF. After this, the recycled resin material M that has moved to the other side 2c of the mounting surface 2a is collected as appropriate, and subsequent drying processes are carried out.

[0050] As described above, by applying the spraying system 1, it becomes possible to carry out the spraying process continuously.

[0051] <Example of spraying system 1> In the conveyor 2 of the spraying system 1 shown in Figure 1, a vibrating conveyor (not shown) may be used, for example. This allows the recycled resin material M placed on the mounting surface 2a to be moved horizontally while applying appropriate vibrations.

[0052] The vibrating conveyor only needs to be able to move horizontally while applying vibration to the recycled resin material M as described above, and various configurations can be applied. It may also be a configuration in which processes such as drying, cooling, sorting, washing, and dewatering can be carried out simultaneously and continuously while moving (for example, a vibrating conveyor manufactured by Symphonia Technology Co., Ltd.).

[0053] When a vibrating conveyor as described above is applied, it may become easier to efficiently spray the CNF dispersion onto the recycled resin material M. Furthermore, if processes other than the spraying process (such as drying, cooling, sorting, washing, and dewatering) are carried out simultaneously, it may contribute to the processing efficiency of the recycled resin material M (or the manufacturing efficiency of molded products, etc.).

[0054] <Example of the drying process> In the drying process, it is sufficient to dry the recycled resin material that has undergone the spraying process as described above (for example, drying it so that the recycled resin material does not melt), and various methods can be applied. Examples include heat drying, forced drying, room temperature drying, and freeze-drying.

[0055] <An example of a molded product> The recycled resin material, after undergoing the spraying and drying processes described above, can be molded as appropriate according to the target recycled product, and is not particularly limited. For example, to facilitate molding the recycled resin material into the desired recycled product, it may be pre-molded into pellets, powder, etc. Then, the pre-molded recycled resin material can be molded into the desired recycled product by injection molding, press molding, or extrusion molding. Furthermore, the molding conditions (molding temperature, molding pressure, etc.) when molding as described above can also be set as appropriate, and are not particularly limited.

[0056] For example, the molding temperature can be set to a temperature common in the recycled resin materials field (e.g., around 230°C), as long as it is within the range that allows for the molding of the desired recycled product, or it can be set to a relatively low temperature, such as below 200°C (e.g., around 160°C or 170°C). By setting the molding temperature low in this way, the amount of thermal energy consumed can be suppressed as the molding temperature decreases, which may contribute to the manufacturing efficiency of the molded product.

[0057] <Verification Example> Sample S1 was prepared by simply pre-molding crushed resin molded products (i.e., a mixture including not only the container and packaging plastics used in Sample S2 described below, but also other resin molded products) collected separately under the Container and Packaging Recycling Law into pellets. Sample S2 was prepared by pelletizing recycled resin material (container-recycled pellets) obtained from container and packaging plastics collected separately under the Container and Packaging Recycling Law. Various verifications were performed as described below.

[0058] The mixed material used in sample S1 is primarily composed of polypropylene, with a small amount of polyethylene, and contains approximately 9% residue (estimated to be talc). The mixed material is in the form of flakes, with a thickness of approximately 2 mm and an outer diameter of approximately 5 mm to 10 mm.

[0059] First, samples S1 and S2 were processed by spraying and drying based on the examples (hereinafter referred to as "example processing" as appropriate). For the spraying process, a spraying system 1 as shown in Figure 1 was used, with a belt conveyor (Belgoch ModeL34-S1 standard model) manufactured by Makitech Co., Ltd. as the conveyor 2, and a micro two-fluid nozzle manufactured by Spraying Systems Japan LLC as the spray nozzle 3.

[0060] The spraying conditions for the CNF dispersion by the spray nozzle 3 were set appropriately so that the cylinder pressure (pressure in the spraying direction by the spray nozzle 3) was within the range of 0 to 1 MPa, and the liquid pressure and spray pressure of the CNF dispersion were within the range of 0 to 0.7 MPa.

[0061] The distance between the spray nozzle 3 and samples S1 and S2 can be adjusted as needed according to the spraying conditions and is not particularly limited, but in this verification example, it was set to approximately 20 cm. Similarly, the feeding speed of samples S1 and S2 by conveyor 2 can also be adjusted as needed according to the spraying conditions and is not particularly limited, but in this verification example, it was set to a range of 1.9 m / min to 5.8 m / min.

[0062] For the CNF dispersion, 84 grams of a CNF dispersion with a CNF concentration of approximately 1 wt (a CNF dispersion obtained in advance by the ACC method) was prepared. This dispersion was then added to a designated container containing 20 liters of water for dilution, and then redispersed using the ACC method to defibrate the CNF and adjust the CNF concentration to 0.01 wt%. In the drying process, samples S1 and S2, which had undergone the spraying process as described above, were dried in an atmosphere at a temperature of 50°C.

[0063] The amount of CNF adsorbed onto samples S1 and S2 after processing as described in the example was measured using the phenol-sulfuric acid method. The CNF concentration for each sample was 0.022 wt% or higher, confirming that a sufficient amount of CNF was attached and coated.

[0064] Furthermore, when we measured and compared the melt flow rate values ​​(g / 10min) of samples S1 and S2 after the example processing at temperatures below 200°C (e.g., 190°C) with the melt flow rate values ​​of the mixed pulverized material that had not undergone the example processing (corresponding to so-called Neat PP), we confirmed that the melt flow rate values ​​of samples S1 and S2 tended to be higher (for example, tended to improve by about 15%).

[0065] The reason why the melt flow rate values ​​of samples S1 and S2 tend to be higher is likely because the CNF concentration of the CNF dispersion used in the example processing was less than 1 wt% (0.01 wt% in this verification example), and therefore, CNF did not adhere excessively to the surface of samples S1 and S2, but rather adhered in an appropriate amount (adhesion occurred when the CNF adsorption amount in this verification example was 0.022 wt% or more). Furthermore, it can be inferred that the CNF that adhered in an appropriate amount to samples S1 and S2 did not hinder the fluidity of samples S1 and S2, but rather acted to contribute to that fluidity.

[0066] Next, based on JIS K 7111-1:2012, samples S21 to S26, which are Charpy impact test specimens (with notches), were prepared by injection molding using sample S2 after the example processing, and the Charpy impact values ​​(kJm) were determined for each. -2 When the values ​​were measured, the results shown in Table 1 below were obtained. For injection molding, a molding machine (HM7-C type) manufactured by Nissei Plastic Industrial Co., Ltd. was used, and the molding conditions were set to an injection molding temperature of 170°C, a mixing speed of 143 rpm, and an injection speed of 52.5 MPa. In addition, each value for samples S21 to S26 in Table 1 below is a converted value when the Charpy impact value of a Charpy impact test piece (with notch) of the mixed pulverized material that has not undergone the example processing is set to 1.

[0067] [Table 1]

[0068] As shown in Table 1, it was confirmed that samples S21 to S26, after the example processing, had approximately 10% or more higher impact resistance compared to the mixed pulverized material that had not undergone the example processing.

[0069] Although the present invention has been described in detail only with respect to the specific examples described above, it will be obvious to those skilled in the art that a wide variety of modifications are possible within the scope of the technical concept of the present invention, and it is natural that such modifications fall within the scope of the claims. [Explanation of Symbols]

[0070] 1…Spraying system 2... Conveyor 3…Spray nozzle 4…Food M...Recycled resin material

Claims

1. A spraying process involves spraying a dispersion containing dispersed cellulose nanofibers onto a recycled resin material obtained by micronizing a molded product made of resin. A drying step for drying the recycled resin material after the spraying step, A method for processing recycled resin materials, characterized by having the following features.

2. The method for processing recycled resin material according to claim 1, characterized in that the dispersion liquid has a concentration of cellulose nanofibers of less than 1 wt%.

3. The dispersion has a cellulose nanofiber concentration of 1 × 10 －４ wt% ~ 1 × 10 －１ The method for processing recycled resin material according to claim 2, characterized in that it is within the range of wt%.

4. The method for processing a recycled resin material according to claim 1, characterized in that the recycled resin material has a maximum outer diameter of 5 cm or less.

5. The method for processing recycled resin materials according to claim 1, characterized in that the molded product is made of olefin resin.

6. The aforementioned spraying process is A conveyor having a mounting surface on which the recycled resin material can be placed and which can move the recycled resin material horizontally, and a spray nozzle positioned opposite the mounting surface and capable of spraying the dispersion, The dispersion liquid is sprayed onto the recycled resin material, which is placed on the mounting surface, using the spray nozzle. The method for processing recycled resin material according to claim 1, characterized in that it is a method for processing recycled resin material as described in claim 1.

7. The method for processing recycled resin material according to claim 6, characterized in that the conveyor consists of a vibrating conveyor.

8. A molded article characterized by being formed by molding a recycled resin material processed by the method for processing recycled resin material described in any one of claims 1 to 7.

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