WO2020136734A1

WO2020136734A1 - Resin molded article and method for producing resin molded article

Info

Publication number: WO2020136734A1
Application number: PCT/JP2018/047701
Authority: WO
Inventors: 大木　武彦; 大木　達彦
Original assignee: 株式会社大木工藝
Priority date: 2018-12-26
Filing date: 2018-12-26
Publication date: 2020-07-02
Also published as: JPWO2020136734A1

Abstract

This resin molded article containing a carbon material 5 as a raw material is configured in such a manner that the carbon material 5 which is the raw material for the resin molded article (container 1) has a carbon purity of at least 90%, the particle size of the carbon material 5 does not exceed 10 μm, and the content of the carbon material 5 falls within the range of 5%-40% by mass.

Description

Resin molded product and method of manufacturing resin molded product

The present invention relates to a resin molded product using a resin material and a carbon material as raw materials and a method for manufacturing the resin molded product.

Conventionally, various resin molded products containing carbon materials have been proposed, focusing on various effects such as the far-infrared radiation effect of carbon materials. Patent Literature 1 proposes a food container made of a synthetic resin containing 70% or less and 10% or more of the total weight of a substance that emits far infrared rays. As an example, the document discloses a tray in which 20% by weight of fine powder of zircon sand is kneaded with polypropylene.

JP-A-1-139372

However, the above document does not describe an example including a carbon material that can be easily and inexpensively obtained. As described above, the carbon material can be expected to have an effect such as a far infrared ray effect, and it can be assumed that various effects can be maximized by setting the content ratio and the like to the optimum conditions.

The present invention has been proposed in view of such circumstances, and its purpose is mainly to provide a resin material containing as a raw material a carbon material that can be easily obtained at low cost and can be expected to have effects such as a far infrared ray effect. It is to provide a resin molded product as a raw material. Further, it is also included in the object of the present invention to provide a method for producing a resin molded product, which is capable of inexpensively producing a resin molded product by using waste.

In order to achieve the above object, the resin molded product of the present invention is a resin molded product containing a carbon material as a raw material, wherein the carbon material has a carbon purity of 90% or more, and the particle size of the carbon material is The carbon content is 10 μm or less, and the content of the carbon material is 5 to 40% by mass.

Further, a method for producing a resin molded product of the present invention is a method for producing a resin molded product containing a carbon material as a raw material, wherein the carbon material has a carbon purity of 90% or more and a particle size of the carbon material is 10 μm or less, the content rate of the carbon material is 5 to 40% by weight, and the waste material containing the synthetic resin is heat-treated a plurality of times in a carbonization furnace in which the temperature is raised stepwise, and carbonization treatment is carried out. The carbon material is obtained by sequentially carrying out a carbonization step for producing a carbonized material, a pulverization step for pulverizing the carbonized material, and an appropriate/inappropriate selection step for removing an inappropriate material by sieving the pulverized material.

Since the resin molded product of the present invention has the above-described configuration, the effect of the far infrared rays of the carbon material can be expected on an object that comes close to or in contact with the resin molded product. Further, since a carbon material is contained as a raw material, a resin molded product can be manufactured at low cost if the carbon material is manufactured based on various materials such as waste plastic.

Since the method for producing a resin molded product of the present invention has the above-described procedure, it is possible to effectively utilize the waste produced by the PET bottle to produce a container having a high far-infrared effect.

It is explanatory drawing of the resin molded product (container) which concerns on one Embodiment of this invention. (A) is a perspective view of the same container, (b) is an enlarged vertical cross-sectional view of the X portion of (a). It is a conceptual diagram which shows the selection process of the detailed processes of the manufacturing method of the carbon material used as the raw material of the resin molded product which concerns on this invention. It is a figure which shows the flow of a process after a selection process in the manufacturing method. It is a schematic block diagram of the carbonization apparatus used for the carbonization process of the manufacturing method. It is a graph which shows the example of transition of control temperature in the carbonization process. It is a photograph which shows the state of the material after each process in the manufacturing method.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The resin molded product (container 1 in the illustrated example) according to the embodiment described below contains the carbon material 5 as a raw material. The carbon material 5 has a carbon purity of 90% or more, a particle size of the carbon material of 10 μm or less, and a carbon material content of 5 to 40 mass %.

FIG. 1 is an explanatory diagram of a container 1 manufactured from such raw materials. The main body outer peripheral portion 1 a of the container 1 is configured such that the particulate carbon material 5 having the above-described particle size is contained in the resin material 6. This container 1 is used, for example, as a cosmetics container.

The carbon material 5 to be contained in the resin material 6 has the above-mentioned carbon purity, particle size, and content rate, and the manufacturing method thereof does not matter, but in the present embodiment, the carbon material 5 is formed by heat-treating the waste material 3. Become. The waste 3 contains polyethylene terephthalate (PET resin) such as PET bottles and other synthetic resins such as plastics. The method of manufacturing the carbon material 5 will be described later with the description of FIGS. 2 to 6.

On the other hand, a thermoplastic resin or a thermosetting resin is used as the resin material 6 which is the main raw material. Specifically, as the thermoplastic resin, polypropylene, silicone, polystyrene, polyamide, vinyl halide resin, polyacetal, polyester, polycarbonate, polyaryl sulfone, polyaryl ketone, polyphenylene ether, polyphenylene sulfide, polyaryl ether ketone, polyether. Examples thereof include sulfone, polyphenylene sulfide sulfone, polyarylate, liquid crystal polyester, and fluororesin. You may use these individually or in combination of 2 or more types. Examples of the thermosetting resin include urea resin and phenol resin.

The resin material 6 is made to contain the above-mentioned carbon material 5 in an amount of 5 to 40% by mass, pelletized, and the pellets melted by heating are supplied to a molding die (not shown) and injection-molded to form a container. 1 is molded. The carbon material 5 may be supplied to the molding die from an injection port different from the resin material 6 in consideration of the case where the mass% of the carbon material 5 is large and the case where the carbon particles are large.

However, some resin materials 6 to be mixed do not mix well with the carbon material 5, and there are various problems in injection molding even if it is called carbon particles. For example, acetylene black is easy to form fine particles and has high conductivity, but is hard to mix with the resin material 6. As a result of various tests, the inventors have found that it is optimal to crush and use the resin material 6 having a particle size of 10 μm or less, preferably 3 to 8 μm, for injection molding. If the above carbon material is larger than 10 μm, it tends to be difficult to mix with the resin material 6.

In addition, the content rate of the carbon material is preferably 5 to 40% by mass in consideration of the productivity (for example, the yield rate) of the molded product and the far-infrared effect of the carbon material 5 in the molded product in a comprehensive test. The inventors have judged that.

If the container 1 containing such a carbon material 5 as a part of the raw material is used as a cosmetic container and a liquid cosmetic product is housed in the container 1, water molecules become fine due to the far infrared effect of the carbon material 5. Then, the cosmetic has a high penetration rate into the skin. The cosmetic container may contain cream, gel, or the like. Further, it can be expected that the carbon material 5 delays the oxidation, and the contents contained therein last longer.

Also, the container 1 containing this kind of carbon material 5 can be used as a food product container. For example, it can be used for drinking water containers, liquor containers, dressing containers, edible oil containers, seasoning containers and the like. It can be used not only for liquids but also for containers for tablets, supplements and powders. When it is used as a food container, a sensory test shows that the food contained in the food has a mellow taste.

The resin molded product is not limited to the container 1, but includes various products. For example, it can be applied to various parts and main bodies used for electric appliances such as vacuum cleaners and air conditioners, fixed telephones, mobile phones, daily necessities, kitchen utensils, stationery and the like. In particular, it is effective when applied to a resin molded product in which the quality of the resin molded product is improved by influencing a product near or in contact with the resin molded product by a far infrared effect or the like. For example, if the carbon material 5 made of activated carbon is used as a raw material in a resin molded product that is the outer shell of the vacuum cleaner, the odor of collected dust can be reduced. If the activated carbon contains an antibacterial agent such as silver, the effect can be further enhanced.

Even if the above effects cannot be expected, if the waste 3 is used as the raw material of the carbon material 5 as will be described later, it can be applied to a wider variety of resin molded products. It will greatly contribute to the solution.

Next, a method of manufacturing the carbon material 5 used as a raw material for the resin molded product such as the container 1 will be described with reference to FIGS. 2 to 6. This manufacturing method is a method of manufacturing the carbon material 5 from the waste 3 containing at least a PET bottle (PET resin) as a raw material, and is also a method of reusing the waste 3.

This manufacturing method is a procedure in which a sorting process, a cutting process, a carbonization process, a crushing process, and an appropriate/unsuitable sorting process are sequentially executed (see FIGS. 2 and 3).

The following describes each process. In addition, when the content rate of the plastic bottle in the waste 3 is known, the sorting step may not be performed. Further, if the waste 3 contains plastic dust and has a size of about 5 cm (about fist) to about 10 cm, carbonization is possible without performing a cutting process.

<Sorting process>
As shown in FIG. 2, this sorting step is a step of ranking the waste 3 into three ranks A, B, and C based on the content rate of the PET bottle. The A rank has a PET bottle content of about 100%, the B rank has a PET bottle content of about 70 to 90%, and the C rank has a PET bottle content of about 50 to 70%. Such selection may be performed manually or by a machine. As for the container 1 shown in FIG. 1, it is sufficient to use the material selected in the A rank as the carbon material 5 as the raw material of the container 1.

<Cutting process>
The cutting process is a process of cutting the waste material 3 as a raw material into flakes (thin pieces), and is performed by using the cutting device 10. The cutting device 10 is not particularly limited, and a known device can be used. The size to be cut into flakes may be determined for each rank. For example, A rank is cut to about 0.5 mm to 3 mm, B rank is cut to about 0.5 to 3 cm, and C rank is cut to about 5 to 10 cm. This cutting size is not particularly limited.

The “after cutting process” column of the table in FIG. 6 shows a photograph of the waste 3 containing plastic waste after cutting each of A rank, B rank, and C rank. As can be seen from FIG. 6, the A rank has a plastic bottle content of about 100%, and therefore is composed of only transparent plastic bottle materials. Further, as can be seen from FIG. 6, the content of the B-rank is about 70 to 90% in the B-rank, so most of them are transparent PET bottles, but the existence of colored plastic material is seen, and the B-rank is Contains a thermosetting resin and a thermoplastic resin. Further, as can be seen from FIG. 6, since the content rate of the C rank is about 50 to 70% in the PET bottle, not only the plastic materials other than the PET bottle, the thermosetting resin and the thermoplastic resin are mixed, but also It is also possible to see the existence of garbage whose material cannot be specified, such as wood chips, rubber, and paper.

The cut products 4 thus cut and formed are housed in the carbonization furnace 21 of the carbonization apparatus 20 in a stacked state together with the carbonization container 25 (see FIG. 3). The carbonized container 25 is preferably one in which no air layer is formed between the cut products 4. This is because the smaller the air layer, the better the carbonization efficiency.

In the “After cutting process” column of the table of FIG. 6, a photograph of the cut product 4 of the waste 3 including the plastic waste after cutting is shown.

<Carbonization process>
The carbonization step is carried out using such a carbonization device 20, and here, an example in which a batch type heated steam carbonization device is used as the carbonization device 20 will be described. In this case, the carbonization container 25 containing the cut product 4 need only be allowed to stand at a predetermined place in the carbonization furnace 21. The carbonization step may be performed using the carbonization device 20 for each rank.

Carbonization of the cut product 4 is performed while gradually increasing the temperature in the carbonization furnace 21, as described above. For example, as shown in FIG. 5, the temperature may be raised in three steps.

As an example, the case of the carbonization furnace 21 capable of carbonizing the cut product 4 of 100 tons per month will be specifically described. First, when the start button of the carbonization furnace 21 is turned on, the heating burner is activated to heat the inside of the carbonization furnace 21 to 420 to 430°C. The temperature inside the carbonization furnace 21 is maintained at around 400°C. Then, the cut product 4 (carbonization container 25) is stored in the carbonization furnace 21 which is hermetically sealed, heated for 100 to 160 minutes, heated to 500 to 550° C., and further heated for 30 to 50 minutes. Good.

At this time, the heating burner that heats the carbonization furnace 21 is not particularly limited, but a burner that uses kerosene or the like as fuel is adopted. If the plastic waste contained in the waste 3 contains a thermoplastic resin and is suddenly treated at a high temperature, it will melt and disappear, while if it contains a thermosetting resin, it will be hard. It becomes a lump and it is difficult to obtain high quality carbide. However, by gradually raising the temperature a plurality of times as described above, it is possible to obtain 20 tons per month of uniformly and high-quality carbonized product of the cut product 4 of 100 tons per month. In the column of "after carbonization step" in the table of FIG. 6, a photograph of the state of the carbide carbonized by the above-mentioned method is shown.

Then, after this, in order to further decompose harmful substances such as dioxins, formaldehydes, phenol resins, coal tars, the temperature may be raised to 750 to 850° C. for treatment.

Further, microwave heating may be performed in the carbonization furnace 21 in addition to normal heating. In this case, since the cut product 4 is internally heated when irradiated with microwaves, the temperature rising rate can be increased and the processing time can be shortened. Further, in this case, since the cut product 4 is heated from the inside by the microwave in addition to the usual heating from the outside, it is possible to obtain a more uniform and high quality carbide.

In addition, in order to "carbonize" the plastic waste contained in the waste 3, it is preferable to carry out in anoxic condition, unlike the case of incinerating ordinary waste to "ash", but in a hypoxic condition. May be If incinerated, carbon dioxide is generated, but if it is oxygen-free or in a state close to it, carbon dioxide is hardly generated and solid carbon is obtained.

The carbonizer 20 is not particularly limited as long as it has a function of gradually raising the temperature by a known carbonizer, but here, a batch type heated steam type carbon device will be described. As shown in FIG. 4, the carbonization apparatus 20 includes a carbonization furnace 21 in which carbonization containers 25 are stored in a stacked state, a heating unit 23 that heats the carbonization furnace space 21a to carbonize the cut product 4, and a carbonization furnace space 21a. Has a control unit 22 that controls the heating unit 23 so as to raise and maintain the temperature at a predetermined temperature, and a sealing door 24 that seals the inside of the carbonization furnace 21 in order to make it oxygen-free.

The carbonization furnace 21 has a closed structure and has a carbonization furnace space 21 a in which the carbonization vessels 25 can be stored in a stacked state. In order to achieve almost complete carbonization, it is desirable to use a double-structured closed type that can block oxygen. The wall portion of the carbonization furnace 21 may be a metal kiln. In consideration of long-term use, at least the inner wall 21b side of the carbonization furnace 21 is preferably formed of heat-resistant brick or fire-resistant brick having heat resistance of 2000° C., for example. .. Further, it is desirable to apply a heat resistant paint to the inner wall 21b in order to use the carbonization furnace 21 for a long period of time.

The heating unit 23 of the carbonization apparatus 20 is configured to directly use heated steam as a heating source, and keeps the temperature in the carbonization furnace space 21a constant by convection of the heated steam. Due to such a convection effect, the plurality of stored carbonized containers 25 (cutting products 4) are heated so that the temperature becomes uniform.

The control unit 22 is composed of a CPU, a program, etc., and is capable of heating and holding the carbonization furnace space 21a in cooperation with a heating unit 23, a temperature detection unit (not shown), and the like.

The sealing door 24 is a door for sealing the inside of the carbonization furnace 21 in an oxygen-free state, and a large one is arranged as shown in FIG. 2 so that a plurality of carbonization containers 25 can be taken in and out by a forklift 26. Is desirable.

According to the carbonization device 20 as described above, since it has a closed structure, it is possible to block oxygen, suppress the generation of carbon dioxide, and improve the accuracy of carbonization. Also, since it is a batch type, it has better cost performance than the rotary type, and it is easy to add more units depending on the amount of processing. Further, if the carbonization container is shaken to perform the carbonization process, the carbonization process can proceed without solidification, but this can be appropriately omitted depending on the amount of carbonization at one time. Since a mechanism such as stirring is unnecessary, the cost of the device itself (initial cost) can be reduced. Further, the carbonization device 20 may be configured to be able to use the dry distillation gas generated by carbonization as heat energy. By doing so, running costs can be reduced.

Although the carbonization container 25 containing the cut product 4 is left standing at a predetermined location in the carbonization furnace 21 for carbonization in this example, a simple rocking mechanism for rocking the carbonization container 25 may be added. Needless to say. In this case, it is possible to obtain a more uniform and high-quality carbide by a large amount of treatment.

In addition to the above, a rocking drum type carbonization furnace or a fluidized bed type carbonization furnace may be adopted as the carbonization device 20. For example, in the case of a drum type carbonization furnace, the inside of the carbonization furnace is divided into a plurality of zones, the temperature is raised in stages, and a blower fan and an air chamber are provided, whereby the carbonization treatment can be continuously performed. In these cases, carbonization can be performed more continuously than in the batch system described above, and thus it is suitable for treating waste containing a large amount of plastic waste. In addition, when the swing drum type is used, unlike the fluidized bed type described later, since it swings without rotating, it is possible to install equipment around it. Although not shown, waste heat generated in the treatment process in the carbonization device 20 may be recovered by a boiler, or a secondary combustion chamber for secondary combustion of carbonization gas generated from the carbonization device 20 may be provided. The re-combustion system may be constructed.

After this carbonization step, after removing the carbide from the carbonization container 25, a crushing step of further crushing the carbide to a predetermined particle size and an appropriate/inappropriate selecting step of removing the inappropriate material by sieving the crushed material are carried out. It

<Crushing process>
In the crushing process, a crushing device 11 that crushes the carbide to a predetermined particle size is used. The crushing device 11 may be used to crush the carbide to, for example, 100 to 500 μm. In the column of "after crushing step" in the table of FIG. 6, the state after crushing the carbide is shown by a photograph.

In the crushing process, for example, rank A may be ground to 10 μm or less (for example, 3 to 8 μm), rank B may be ground to 10 to 30 μm, and rank C may be ground to 100 to 200 μm. Since the carbon material 5 having a particle size of 10 μm or less is required to manufacture the container 1, in this example, the A rank material is used as a raw material. However, as will be described later, if the particle size is pulverized to 10 μm or less, B, Even if it is C rank, it can be adopted as a raw material of the container 1.

In the column of "after crushing process" in the table of FIG. 6, the state after crushing of each of A rank, B rank, and C rank is shown in a photograph. It can be seen from the photograph after the crushing process of A rank that it is a very fine and homogeneous carbide. The photographs after the B rank pulverization process also show that the activated carbon is similarly fine and homogeneous. From the photograph after the crushing process of rank C, since it is black and white, some are seen as whitish, but it is not an impurity but a uniformly carbonized one.

<Appropriate selection process>
In the proper/inappropriate selection step, the proper/inappropriate selection device 12 is used to remove the inadequate matter by sieving the pulverized material. The suitable/inappropriate sorting device 12 is not particularly limited, and examples thereof include a vibrating screen device and a magnetic separation device.

The crushed carbide after the proper/inappropriate selection process is used as the carbon material 5 of the container 1. In the present embodiment, the A-ranked one having a particularly small grain size is adopted as the carbon material 5. In addition, after carrying out this step, the activation step may be carried out for those of A rank and B rank. The activation step may be carried out for the C rank, but in the application example of the C rank, the activation step need not be carried out. The activation step will be described later.

In the above-described carbon material manufacturing method, in consideration of the particle size and carbon purity of the carbon material 5, the carbon material 5 that is the raw material of the container 1 is generated based on the A-rank waste 3 as described above. It is possible to preferably use the carbide. However, if a carbon material 5 having a particle size of 10 μm or less and a carbon purity of 90% or more is manufactured, even B and C rank carbides can be adopted as a raw material of the container 1. Further, on the assumption that the container 1 is manufactured in a large amount, it is desirable to use the waste material B of rank B, which is expected to generate a large amount, as a raw material of the container 1. That is, it is desirable to use the waste material 3 having a PET bottle content of 70% or more as the raw material of the carbon material 5 of the container 1.

<Activation process>
The A rank products are subjected to alkali activation treatment in an activated carbon treatment device 13 composed of a hybrid carbonization furnace using microwaves and heat to form activated carbon having a specific surface area of 3,000 to 3,600 m2/g. For the B rank products, steam activation is performed in another activated carbon treatment device 13 to form activated carbon having a specific surface area of 500 to 1,000 m 2 /g.

The activated carbon thus formed may be crushed into particles having a predetermined particle size by using a crushing device (not shown) such as a jet mill for the purpose of reuse.

<A rank>
The A-ranked carbide can be activated carbon derived from polyethylene terephthalate (PET) that contains almost no substances other than PET bottles. By setting the particle size to 10 μm or less, the carbon material 5 as the raw material of the container 1 can be obtained. Can be used.

Also, A-ranked carbide can be used as activated carbon for electrode materials such as rapid charge/discharge capacitors (EDLC) of electric vehicles. A rapid charge/discharge capacitor is formed by coating activated carbon on the surface of a current collector such as aluminum foil, and can store electricity on the surface.Activated carbon derived from polyethylene terephthalate has a high specific surface area and a fine surface area. Although the pore structure was complicated and there was concern about the response characteristics when the current density was increased, by setting the particle size to 10 μm or less, not only high discharge capacity but also good speed characteristics can be achieved. A-rank activated carbon can be used not only as an electrode material for fuel cells but also as a high-performance catalyst, an adsorbent for harmful substances, and a thread for highly functional fibers.

<B rank>
The B-ranked carbide can be activated carbon containing about 10 to 30% of substances other than PET bottles, and has a particle size of 10 to 30 μm or less, and is used for air conditioners, automobile filters, deodorants, purifying agents, etc. be able to. As the filter body, a porous sheet-like material is used, and a filter is formed by incorporating activated carbon into the sheet. Micropores are formed in the activated carbon, and if the micropores are stored with an artificial enzyme that has a function of decomposing the odorous component by oxidizing the odorous component with active oxygen and converting it into another substance, It can adsorb and decompose various odorous components.

The activated carbon thus formed based on the waste materials 3 of A rank and B rank may be used as the carbon material 5 of the container 1. Since activated carbon has a large specific surface area, a higher far-infrared effect can be expected. Alternatively, the carbon material 5 may be obtained by storing artificial enzymes or antibacterial agents in the fine pores of activated carbon.

<C rank>
Conventionally, those with many impurities other than PET bottles classified into C rank have been subject to landfill or dumping, which has been a serious environmental problem. However, the crushed carbide of C rank in the present embodiment is carbonized to a uniform and good quality even if the substance other than the PET bottle is about 30 to 50% of the carbonized substance. It can be used for etc. As a soil conservation/improvement material, crushed carbide may be mixed in a volume ratio of about 10%. This makes it possible to convert clayey and hard soil into soft soil and improve water permeability and water retention of the soil. Moreover, since it is possible to use alkaline soil, experiments by the inventor have revealed that growing crops, flowers, and lawns in this soil improves the growing condition.

Furthermore, since soil fungi easily settle in these alkaline soils, they are suitable for organic cultivation, and are also effective as acid rain countermeasures and sediment erosion prevention measures. It can be said that this is a breakthrough in the effective use of waste 3 including plastic waste. For example, by installing a block of snow-melting material on the road surface or as a roofing material on the roof, the heat conduction and diffusion effect of the carbide makes it possible to use the heater and sunlight for cold regions. It can be used as a snow melting road and snow melting roof tile. In addition, if a block in which crushed carbide of C rank is mixed is spread in a waterway or a river, the carbide adsorbs nitrogen, phosphorus, etc., and microorganisms settled in the water decompose harmful substances to purify the water. It became clear by the experiment of. As described above, even the C-rank carbide obtained from the waste 3 containing low-purity plastic waste can be effectively used for various purposes without being discarded.

It has been proved by various tests by the inventors of the present invention that the carbonization by the above-mentioned stepwise temperature rise can uniformly and uniformly carbonize the waste 3 containing the plastic waste. That is, according to the above-mentioned method, the waste 3 containing the plastic waste can be reduced by 20% by carbonization (for example, about 30 tons of the waste 3 can be converted to about 6 tons of carbide), and Most of the carbide can be reused.

Further, depending on the size of the carbonization furnace 21, it takes time to raise the temperature in the furnace to a predetermined temperature. Therefore, if a plurality of furnaces that complete the carbonization with a time difference are provided and the replacement method is used, the carbonization step can be performed efficiently. be able to.

Further, as described above, when the waste 3 containing the plastic waste is put into the carbonization device 20 equipped with the carbonization furnace 21, the temperature-controlled carbonization device 20 is operated for a predetermined time, so that use without specialized knowledge is required. A person can easily carry out the carbonization treatment. Therefore, if the waste 3 is introduced into a factory in which it is difficult to dispose of the waste 3, the waste 3 including defective products generated in manufacturing can be reused.

As described above, according to the container manufacturing method of the present embodiment, the waste 3 recycling processing method is performed to obtain the carbon material as the raw material. Therefore, it can be applied not only to the treatment facilities of local governments, but also to the waste treatment system in a factory of a private company, for example. In particular, the batch-type carbonization device 20 described above has a smaller installation area than a rotary type or a screw type, can be easily reduced in cost, can be smokeless, and does not require cooling water. It is applicable to processing.

Further, according to the method for manufacturing a carbon material shown in FIGS. 2 and 3, the waste 3 containing plastic waste can be efficiently carbonized, and the carbonized material can be used as the carbon material 5 as the raw material of the container 1. Can be effectively utilized. Therefore, it can contribute to the solution of illegal dumping and marine pollution, which have been regarded as social problems in recent years. Further, since the waste 3 having a low rank in which many things other than plastic waste are mixed can be effectively reused, it is possible to aim at zero disposal of the waste 3 containing plastic waste. As described above, if carbon materials, which are the materials for various resin molded products other than the container 1, are manufactured by the above-described manufacturing method, depending on the type of resin molded product to be molded, for example, C rank products can also be used. It can greatly contribute to the solution of plastic waste problems.

In addition, since the present resin molded product such as the container 1 contains the carbon material 5, that is, the ratio of the resin material 6 is reduced as compared with general resin products, the post-treatment of the resin molded product itself. If it becomes easier. In this way, according to such a resin molded product, the amount of plastic dust generated can be reduced.

Note that, in the above example according to the present embodiment, the waste 3 is classified into ranks A, B, and C according to the plastic bottle content rate, but the waste may not include plastic bottles. Further, such waste may be composed of only thermosetting resin, may be composed of only thermoplastic resin, or may be a mixture thereof. Further, the carbonization method may be changed according to the characteristic points such that the thermosetting resin is easily carbonized and the capacity after carbonization does not become so small.

The carbon material 5 used as the raw material of the resin molded product is not limited to the one manufactured by the above-described manufacturing method, and graphite particles crystallized by heat treatment at 2000° C. or higher may be used. For example, a phenol resin molded product (CFRP) having carbon fiber as a core material is manufactured, and is fired at 2000° C. to 3000° C. in a vacuum to carbonize a portion of the phenol resin to crystallize graphite particles. You may use it as the carbon material 5 which is a raw material of a molded article. If graphite particles are used as the carbon material 5, it is possible to protect the internal liquid from external heat due to its high thermal conductivity. The carbon material 5, which is a raw material for the resin molded product, may be manufactured by any method.

1 container (resin molded product)
3 Waste 4 Cut product 5 Carbon material 6 Resin material

Claims

A resin molded product containing a carbon material as a raw material,
The carbon material has a carbon purity of 90% or more,
A resin molded article, wherein the carbon material has a particle size of 10 μm or less, and the carbon material content is 5 to 40 mass %.
In claim 1,
A resin molded article, wherein the carbon material is formed by heat treating waste.
In claim 2,
A plastic molded product, wherein the waste has a plastic bottle content of a predetermined value or more.
In Claim 2 or 3,
The resin material is formed by carbonizing the waste material a plurality of times in a carbonization furnace in which the temperature is raised stepwise.
In any one of claims 1 to 4,
A resin molded product, which is used as a cosmetic container.
A method for producing a resin molded product containing a carbon material as a raw material,
The carbon material has a carbon purity of 90% or more,
The particle size of the carbon material is 10 μm or less, the content of the carbon material is 5 to 40% by weight,
A carbonization step in which a waste containing a synthetic resin is heat-treated a plurality of times in a carbonization furnace where the temperature is raised stepwise, and a carbonization process is performed to generate a carbide.
A crushing step of crushing the carbide,
A method for producing a resin molded article, characterized in that the carbon material is obtained by sequentially performing an appropriate/inappropriate selection step of sieving a pulverized product to remove an inappropriate product.