WO2021125016A1 - プラスチック廃棄物を利用した合成樹脂成形品 - Google Patents
プラスチック廃棄物を利用した合成樹脂成形品 Download PDFInfo
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- WO2021125016A1 WO2021125016A1 PCT/JP2020/045858 JP2020045858W WO2021125016A1 WO 2021125016 A1 WO2021125016 A1 WO 2021125016A1 JP 2020045858 W JP2020045858 W JP 2020045858W WO 2021125016 A1 WO2021125016 A1 WO 2021125016A1
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- Prior art keywords
- plastic
- plastic waste
- molded product
- waste
- powder
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- 238000000465 moulding Methods 0.000 claims abstract description 38
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Images
Classifications
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Definitions
- the present invention is a plastic waste derived from marine plastic waste, industrial waste discharged from a company's factory, etc., and general waste discharged from a consumer, and is in a state in which a plurality of types of plastic are mixed.
- the present invention relates to a synthetic resin molded product obtained by reusing the plastic waste of the above as a raw material, and a method for producing the same.
- plastic waste is collected in a state where many types of plastics are mixed (miscellaneous state), but plastics have different physical properties (softening and melting temperature, hardness, etc.) depending on the type, so they are in a miscellaneous state. As it is, it is very difficult to use it for material recycling.
- PET resin and the like are relatively easy to sort from a state in which a large number of types of plastic are mixed, so that they are actually contained in the marine plastic waste. Attempts have been made to reuse the PET bottles selected from the above as raw materials for new PET resin molded products. However, there are very few types of plastics that can be easily sorted from a mixture of many types of plastics, and most plastics cannot be used for material recycling with current technology.
- the collected marine plastic waste is used as part of the raw material for products in a state where many types of plastic are mixed without sorting by type, but blocks are manufactured by mixing with concrete. , They are only used for road materials by mixing with asphalt and stone, and they simply contain marine plastic waste in other products, which is far from material recycling.
- the present invention is intended to solve such a problem of the prior art, and is a difficulty in plastic waste (marine plastic waste and industrial waste or general waste) in which a plurality of types of plastics are mixed. It is an object of the present invention to provide a synthetic resin molded product obtained by reusing (including separable plastic waste and the like) as a raw material, and a synthetic resin molded product having a non-synthetic appearance, and a method for producing the same.
- the synthetic resin molded product using the plastic waste according to the present invention is molded using the powder of the plastic waste in which a plurality of types of plastics are mixed and the powder of the second material that does not melt under the temperature condition of 200 ° C. as raw materials.
- a large number of spots, which are different in color and / or glossiness from the colored base color of the plastic of the molded product, are randomly scattered on the surface of the molded product and have a stippling pattern on the surface of the molded product. Is characterized by being formed.
- the raw material plastic waste marine plastic waste, or difficult-to-separable plastic waste in industrial waste or general waste can be used.
- the powder of the plastic having a melting point higher than the molding temperature and the powder of the second material are dispersed inside and on the surface of the molded product in the original color.
- the color and / or glossiness is different from that of the base color and that the one exposed on the surface of the molded product constitutes the spot.
- the method for producing a synthetic resin molded product using plastic waste according to the present invention is a state in which a plurality of types of plastics having a diameter or side of 5 mm or less or a weight of 0.1 g or less and different colors and melting points are mixed. 30 to 80% by weight of plastic waste and 20 to 70% by weight of a second material having a diameter or side of 5 mm or less and not melting under a temperature condition of 200 ° C. are mixed, and the mixture thereof is mixed in diameter or by a pulverizer. It is crushed so that it becomes a powder with a side of 1 mm or less, and the obtained powder is supplied to a molding machine to carry out a molding process.
- the plastic having a melting point higher than the molding temperature
- the powder of the above and the powder of the second material which are different in color and / or glossiness from the base color of the molded product, are characterized in that spots forming a stippling pattern are formed on the surface of the molded product.
- plastic waste (marine plastic waste and difficult-to-separate plastic waste in industrial waste or general waste, etc.) in which multiple types of plastic are mixed (miscellaneous state) can be disposed of.
- plastic waste in a miscellaneous state can be separated by type without being sorted. Most of them can be reused as raw materials for synthetic resin molded products in a miscellaneous state, and as a result, depleting resources can be effectively utilized, and effective treatment methods for marine plastic waste can be used. It can be established and can greatly contribute to the reduction of adverse effects on the natural environment.
- FIG. 1 is a plan view of a synthetic resin molded product (deck material 31) according to the first embodiment of the present invention.
- FIG. 2 is an explanatory diagram of a method for manufacturing a synthetic resin molded product according to the second embodiment of the present invention.
- FIG. 3 is a diagram showing a configuration example of a pulverizer 4 that can be used in the method for producing a synthetic resin molded product according to the second embodiment of the present invention.
- FIG. 4 is a diagram showing another configuration example of the crushing apparatus 4 that can be used in the method for producing a synthetic resin molded product according to the second embodiment of the present invention.
- FIG. 5 is an enlarged cross-sectional view of the surface layer portion of the deck material 31 manufactured by the method for manufacturing a synthetic resin molded product according to the second embodiment of the present invention.
- the synthetic resin molded product using the plastic waste according to the present invention is a plastic waste in a state where a plurality of types of plastics are mixed (marine plastic waste, and difficult-to-separable plastic waste in industrial waste or general waste). It is a synthetic resin molded product molded using (including, etc.) as the first raw material, for example, various building materials (deck material, pillar material, bundle material, wall plate material, handrail material, window frame material, etc.), civil engineering. It can be configured as construction materials (pile, earth retaining fence, roadbed material (interlocking block), etc.), miscellaneous goods (plant pots, planters, boxes, etc.), furniture, and other products (including semi-finished products and parts).
- deck material various building materials
- pillar material deck material
- bundle material wall plate material
- handrail material handrail material
- window frame material etc.
- civil engineering civil engineering.
- It can be configured as construction materials (pile, earth retaining fence, roadbed material (interlocking block), etc.), miscel
- FIG. 1 is a plan view of a synthetic resin molded product (deck material 31) according to the first embodiment of the present invention. As shown, the surface of the deck material 31 is formed with a large number of irregularities extending in the longitudinal direction.
- spots 33 are derived from unmelted grains of plastic waste used as the first raw material or a second raw material (hereinafter referred to as "second material") mixed with the plastic waste. Is.
- plastic waste P in a state in which a plurality of types of plastics are mixed is used.
- plastics of various colors are mixed and have different melting points (for example, those having a melting point of 200 ° C. or higher, or those having a melting point of 200 ° C. or higher, or those having different melting points. Those with a temperature of 200 ° C. or lower) are mixed.
- a plastic film or the like to which foreign matter such as aluminum or paper is attached may be mixed.
- the wood chip W is used as the second material.
- wood chips as used herein means wood fragments or wood powder such as natural wood, laminated wood, MDF, or plywood, and is produced during wood processing at a sawmill or a woodworking product manufacturing factory. Includes sawdust and shavings, and discarded wood, its offcuts, wood products (wooden furniture, wooden building materials, etc.), or crushed drifting wood.
- Molding machines are used to mold plastic waste P in which multiple types of plastic are mixed and wood chip W powder (diameter or side is 1 mm or less) that does not melt under temperature conditions of 200 ° C.
- the molding temperature set in the molding machine
- the plastic powder having a melting point lower than the heating temperature melts and mixes to form a binder for the deck material 31 (molded article).
- plastics having a melting point higher than the molding temperature foreign substances such as aluminum and paper, and powder of wood chips W do not melt and function as fillers in a state of being dispersed inside and on the surface of the binder.
- the base color of the deck material 31 is a color synthesized by mixing various original colors of a plastic serving as a binder (a plastic having a melting point lower than the molding temperature) (for example, a grayish color or a secondary color).
- a plastic serving as a binder a plastic having a melting point lower than the molding temperature
- the color becomes brownish.
- the plastic, foreign matter such as aluminum and paper, and the powder of the wood chip W having a melting point higher than the molding temperature are dispersed inside the deck material 31 in the original color. Among them, those whose color and / or glossiness are different from those of the base color and which are exposed on the surface of the deck material 31 form the spot 33.
- the raw materials (plastics having a melting point higher than the molding temperature, foreign substances such as aluminum and paper, and powder of wood chips W), which are the sources of the spots 33, are present on the surface of the deck material 31 immediately after molding. Although it is not exposed, it can be exposed on the surface of the deck material 31 by brushing the surface with a rotating brush or the like and scraping off the surface layer (resin layer) of the deck material 31.
- the deck material 31 of FIG. 1 described as the first embodiment can be manufactured by the following method. First, a plastic waste P in which a plurality of types of plastics are mixed is prepared and stored in the first tank 1 shown in FIG. Further, a second material that does not melt under a temperature condition of 200 ° C. is prepared and stored in the second tank 2 shown in FIG.
- plastic waste P marine plastic waste selected from the collected marine floating waste, hard-to-separable plastic waste in industrial waste or general waste, and the like are used.
- plastics of various colors are mixed and have different melting points (those with a melting point of 200 ° C or higher and 200 ° C). The following) are mixed.
- a plastic film or the like to which foreign matter such as aluminum or paper is attached may be mixed.
- the amount of substances other than plastic mixed is preferably 10% by weight or less of the total amount of the plastic waste P.
- the plastic waste P is stored in the first tank 1 in the form of small pieces having a diameter or side of 5 mm or less or a weight of 0.1 g or less. Therefore, when the plastic waste P has a diameter or one side of 5 mm or more or a weight of 0.1 g or more, it is stored in the first tank 1 by using a crusher or the like. A step of crushing so as to form a small piece having a diameter or one side of 5 mm or less or a weight of 0.1 g or less is carried out. It should be noted that the plastic waste P may contain a form other than the small pieces (for example, those having a length of 5 mm or more gathered in the form of lint, fine powder, etc.). ..
- the wood chip W is used as the second material that does not melt under the temperature condition of 200 ° C.
- the wood chip W means wood fragments or wood powder such as natural wood, laminated wood, MDF, or plywood, and sawdust or shavings generated by wood processing at a sawmill or a woodworking product manufacturing factory. It also includes discarded wood, its scraps, wood products (wooden furniture, wooden building materials, etc.) or crushed drifting wood.
- the wood chip W has a diameter or a side of 5 mm or less and is housed in the second tank 2. Therefore, when the wood chip W has a diameter or a side of 5 mm or more, the diameter or one side becomes 5 mm or less by using a crusher or the like before accommodating the wood chip W in the second tank 2. The step of crushing is carried out.
- the wood chip W may contain foreign substances such as paper, fibers, laminated sheets, and metal powder.
- the plastic waste P contained in the first tank 1 and the wood chips W stored in the second tank 2 are each conveyed by a conveying device (not shown) and put into the mixer 3.
- the stirring impeller 3b is configured to rotate at a low speed (for example, 600 rpm or more) in the bowl 3a, and the charged object to be processed is stirred in the bowl 3a. , Use a mixture.
- the mixing ratio of the plastic waste P and the wood chips W is preferably the same amount (50% by weight each), but the amount is appropriately increased or decreased depending on the conditions (30 to 80% by weight of the plastic waste P,
- the wood chip W can be 20 to 70% by weight).
- the plastic waste P and the wood chip W have the same size (upper limit size) when they are stored in the tanks 1 and 2, but they are short due to differences in specific gravity and shape. It may be difficult to mix the whole homogeneously with time stirring. In such a case, it is preferable to stir for a sufficient time. For example, when the mixture is stirred for 5 minutes or more, the frictional heat generated by the stirring removes the water contained in the entire raw material, and the amount of soft plastic (particularly, film-like plastic) in the plastic waste P is small. It can be softened to and blend with the wood chip W, and the whole can be mixed uniformly. However, in some cases, the whole can be uniformly mixed by stirring for a short time (for example, about 1 minute). Therefore, the stirring time can be appropriately determined while checking the mixing condition.
- a short time for example, about 1 minute
- the mixture is discharged from the mixer 3 and quantitatively supplied to the crushing device 4 for crushing.
- the specific configuration of the crushing apparatus 4 is not limited, but when a plastic waste P having a diameter or a side of 5 mm or a weight of about 0.1 g and a wood chip W are introduced, A crushing device 4 is used in which 75% by weight or more of the powder can be crushed so as to be a powder having a diameter or one side of 1 mm or less.
- a rotor 12 having a plurality of rotary blades 11 (or a plurality of hammers) attached to an outer peripheral portion and a shavings arranged so as to surround the radial outer side of the rotary trajectory of the rotary blades 11.
- a crusher having a shape-shaped fixed blade 13, and by rotating the rotor 12 at high speed, the object to be processed introduced through the supply path 15 formed inside the rotating shaft 14 is fixed to the rotating blade 11.
- An impact type pulverizer 4A capable of pulverizing by a strong impact action by the blade 13 can be used as the pulverizer 4.
- a rotor 22 having a file-shaped uneven surface 21 formed on the surface as shown in FIG. 4 (1) is provided, and as shown in FIG. 4 (2), two rotors 22a and 22b are spaced apart from each other at a predetermined distance.
- the crusher is arranged so that the uneven surfaces 21 face each other, and the rotors 22a and 22b are rotated at high speed in opposite directions, and the rotors 22a and 22b are rotated at high speed in opposite directions via a supply path 24 formed inside the rotating shaft 23. Therefore, the pulverizer 4B configured to supply the object to be processed to the region between the rotors 22a and 22b and collide with the uneven surface 21 to pulverize can be used as the pulverizer 4.
- the crushing device 4 pulverizes the object to be processed having a diameter or one side of about 5 mm or a weight of about 0.1 g so that the diameter or one side is 1 mm or less. Needs to rotate the rotor of the crushing device 4 (for example, the rotor 12 shown in FIG. 3 or the rotors 22, 22a, 22b shown in FIG. 4) at a high speed (for example, 1500 rpm or more). Then, when the object to be processed is supplied to the crushing device 4 in which the rotor rotates at high speed, heat is generated due to friction between the objects to be processed and between the object to be processed and the elements in the crushing device 4. If such a crushing step is continuously carried out, the inside of the crushing device 4 and the object to be treated may become hot (for example, 80 ° C. or higher).
- the plastic waste P in which a plurality of types of plastics are mixed is supplied to the crushing apparatus 4 as in the present embodiment, it is added to the plastic waste P such as sheets and films having a low melting point at the time of plastic production. Since the low melting point additive is contained, when the inside of the crushing device 4 rises to about 80 ° C., they soften and the elements in the crushing device 4 (for example, the rotary blade 11 shown in FIG. 3 are fixed. There is a concern that the pulverization efficiency may decrease or the pulverization may not be possible due to adhesion and accumulation on the blade 13 or the uneven surface 21) of the rotor 22 shown in FIG.
- the impact type pulverizer 4A shown in FIG. 3 is configured so that the particle size of the pulverized product can be adjusted by adjusting the clearance dimension between the rotary blade 11 and the fixed blade 13 (the gap dimension can be adjusted).
- the particle size of the pulverized product can be made smaller by setting it smaller), but when a plastic film with a thickness of about 100 ⁇ m is contained in the plastic waste P, the rotary blade 11 and the fixed blade Even if the gap size with 13 is set as small as possible, an extremely thin plastic film may slip through those gaps, and in this case, it cannot be pulverized to a diameter or a side of 1 mm or less.
- the crushing device 4 when a mixture of the plastic waste P and the wood chips W is supplied to the crushing device 4 and the crushing step is performed, even if the temperature of the crushing device 4 rises due to frictional heat, a small amount contained in the mixture is contained. The temperature rise can be suppressed due to the evaporation of residual water, and even if a part of the plastic softens and momentarily adheres to the elements in the crusher 4, the wood chips W will cause them to adhere. It will be scrubbed (ie, the wood chips W will collide with the attached plastic and physically peel them off), and as a result, even if the crushing step is continuously performed, the crushing device 4 It is possible to preferably avoid the adhesion and accumulation of plastic on the rotor and the like.
- the plastic waste P is stirred in the crushing apparatus 4 in a state of being mixed with the wood chips W, even if the plastic waste P contains an extremely thin plastic film, it is stirred. It is possible to preferably prevent them from slipping through the gap between the rotary blade 11 and the fixed blade 13 by themselves.
- the mixing ratio of the wood chips W is less than 20% by weight (the mixing ratio of the plastic waste P is 80% by weight or more), the above-mentioned plastic adhesion prevention effect and slip-through prevention effect are reduced.
- the mixing ratio of the wood chips W is preferably 20% by weight or more because there is a possibility that the wood chips W will be mixed.
- the mixing ratio of the plastic waste P is less than 30% by weight (the mixing ratio of the wood chip W is 70% by weight or more)
- the plastic component is used as a binder when the crushed product is used as a raw material for the synthetic resin molded product.
- the mixing ratio of the plastic waste P is preferably 30% by weight or more, because it may not function well (molding defects occur).
- the wood chip W is used as the material (second material) to be mixed with the plastic waste P, but other materials (for example, carbon fiber and glass fiber used for FRP) are used.
- the crushed or crushed material of the above, or the crushed material of shells, bamboo chips, rice husks of grains, etc.) can also be used as the second material.
- the material does not melt under the temperature condition of 200 ° C. Even if the temperature inside the crushing device 4 rises by rotating the rotor of the crushing device 4 at high speed, the temperature does not significantly exceed 100 ° C. Therefore, the second material has a heat resistance of about 200 ° C. If so, it is possible to prevent the adhesion and accumulation of plastic inside the crushing device 4 without any problem.
- the powder of the mixture of the plastic waste P and the wood chip W is supplied to an extrusion molding machine (or an injection molding machine, a press molding machine, a casting molding machine, etc.) as a raw material of the deck material 31, and the molding process is performed. carry out. At this time, pigments and other additives can be added to the raw materials as needed.
- the raw material (and additives) is heated in the molding machine, and the plastic waste P supplied as the raw material is heated.
- the powder of the plastic having a melting point lower than the molding temperature melts and mixes to become a binder in the deck material 31 (molded article).
- plastics having a melting point higher than the molding temperature foreign substances such as aluminum and paper, and powder of wood chips W function as fillers in a state of being dispersed inside and on the surface of the binder without melting.
- the base color of the deck material 31 is a color synthesized by mixing various original colors of a plastic serving as a binder (a plastic having a melting point lower than the molding temperature) (for example, a gray color or a secondary color).
- a plastic serving as a binder a plastic having a melting point lower than the molding temperature
- the plastic, foreign matter such as aluminum and paper, and the powder of the wood chip W having a melting point higher than the molding temperature are dispersed inside the deck material 31 in the original color.
- those whose color and / or glossiness are different from those of the base color and which are exposed on the surface of the deck material 31 form the spot 33.
- the raw materials plastics having a melting point higher than the molding temperature, foreign substances such as aluminum and paper, and powder of wood chips W
- the surface of the deck material 31 immediately after molding is composed of a resin layer made of a plastic serving as a binder (a plastic having a melting point lower than the molding temperature), and is a raw material (molding temperature) which is a source of the spot 33.
- a resin layer made of a plastic serving as a binder a plastic having a melting point lower than the molding temperature
- a raw material molding temperature
- the surface of the deck material 31 after molding is brushed with a rotating brush or the like to scrape off the surface layer (resin layer) of the deck material 31 (for example, a layer 0.5 mm from the surface).
- a large number of spots 33 distributed inside the surface layer are exposed on the surface of the deck material 31.
- the deck material 31 of the present embodiment has a large number of irregularities on the surface (convex portion 32 and concave portion 34 shown in FIG. 5 (1)) depending on the mold (or by embossing immediately after molding) at the time of molding. ) Is formed, and when the surface is brushed, the convex portion 32 is hit by the brush more strongly than the concave portion 34. Therefore, as shown in FIG. 5 (2), the convex portion 32 is formed. As a result, more resin layers are scraped, and as a result, more spots 33 are exposed in the convex portion 32.
- the plastic waste P used as a raw material difficult-to-separable plastic waste in industrial waste or general waste is mentioned, and this is the recovered industrial waste.
- the plastic waste in general waste is limited to those that are difficult to separate. That is, it is not necessary to exclude the plastic waste that is easily separated from the collected plastic waste from the target of the plastic waste P used as a raw material. Therefore, the collected plastic waste is left as it is (easy to separate). It can be used as a raw material (in a state where plastic and difficult-to-separate plastic are mixed).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Wood Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
Description
図1は、本発明の第一実施形態に係る合成樹脂成形品(デッキ材31)の平面図である。図示されているように、このデッキ材31の表面には、長手方向に延在する多数の凹凸が形成されている。
第一実施形態として説明した図1のデッキ材31は、次のような方法によって製造することができる。まず、複数種類のプラスチックが混在した状態のプラスチック廃棄物Pを用意し、図2に示す第一タンク1に収容する。また、200℃の温度条件下において溶融しない第二材料を用意し、図2に示す第二タンク2に収容する。
2:第二タンク、
3:ミキサー、
3a:ボウル、
3b:撹拌用インペラー、
4:粉砕装置、
4A:衝撃型微粉砕機、
4B:微粉砕機、
11:回転刃、
12:ローター、
13:固定刃、
14:回転軸、
15:供給路、
21:凹凸面、
22,22a,22b:ローター、
23:回転軸、
24:供給路、
31:デッキ材、
32:凸部、
33:スポット、
34:凹部、
Claims (4)
- 複数種類のプラスチックが混在した状態のプラスチック廃棄物の粉末と、200℃の温度条件下において溶融しない第二材料の粉末を原料として成形された合成樹脂成形品であって、
成形品のベースカラーとは色彩及び/又は光沢度が異なる多数のスポットが、成形品の表面においてランダムに点在し、成形品の表面に点描模様が形成されていることを特徴とする、プラスチック廃棄物を利用した合成樹脂成形品。 - 原料となるプラスチック廃棄物として、海洋プラスチックごみ、又は、産業廃棄物又は一般廃棄物中の難分別性のプラスチックごみが使用されていることを特徴とする、請求項1に記載のプラスチック廃棄物を利用した合成樹脂成形品。
- 原料となるプラスチック廃棄物に含まれているプラスチックのうち、成形温度よりも融点が高いプラスチックの粉末、及び、第二材料の粉末が、オリジナルカラーのまま成形品の内部及び表面において分散し、それらのうち、色彩及び/又は光沢度がベースカラーとは異なり、かつ、成形品の表面に露出したものがスポットを構成することを特徴とする、請求項1に記載のプラスチック廃棄物を利用した合成樹脂成形品。
- 直径又は一辺が5mm以下又は重量が0.1g以下で、色及び融点が異なる複数種類のプラスチックが混在した状態のプラスチック廃棄物30~80重量%と、直径又は一辺が5mm以下で、200℃の温度条件下において溶融しない第二材料20~70重量%とを混合し、
それらの混合物を、粉砕装置によって直径又は一辺が1mm以下の粉末となるように粉砕し、
得られた粉末を成形機に供給して成形工程を実施し、
成形品の表層を削ることにより、プラスチック廃棄物に含まれているプラスチックのうち成形温度よりも融点が高いプラスチックの粉末、及び、第二材料の粉末であって、色彩及び/又は光沢度が成形品のベースカラーとは異なるものにより、点描模様を構成するスポットを成形品の表面に露出させることを特徴とする、プラスチック廃棄物を利用した合成樹脂成形品の製造方法。
Priority Applications (4)
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AU2020409047A AU2020409047A1 (en) | 2019-12-16 | 2020-12-09 | Synthetic resin molded article using plastic waste |
US17/757,347 US20220355552A1 (en) | 2019-12-16 | 2020-12-09 | Synthetic resin molded article using plastic waste |
CN202080086594.6A CN114829463B (zh) | 2019-12-16 | 2020-12-09 | 利用塑料废弃物的合成树脂成形品 |
EP20901544.5A EP4056629A4 (en) | 2019-12-16 | 2020-12-09 | RESIN MOLDED PART FROM PLASTIC WASTE |
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JP2019226084A JP6829848B1 (ja) | 2019-12-16 | 2019-12-16 | プラスチック廃棄物を利用した合成樹脂成形品 |
JP2019-226084 | 2019-12-16 |
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JP (1) | JP6829848B1 (ja) |
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US20220266259A1 (en) * | 2019-07-12 | 2022-08-25 | Technique Co., Ltd. | Method for grinding plastic waste and method for manufacturing synthetic resin molded product using plastic waste |
JP6695540B1 (ja) * | 2019-12-16 | 2020-05-20 | 株式会社手工仁久 | 海洋浮遊プラスチックごみを利用した合成樹脂成形品の製造方法 |
TWI787131B (zh) * | 2022-05-17 | 2022-12-11 | 方建弘 | 再生建材及其製造方法 |
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AU2020409047A1 (en) | 2022-06-23 |
CN114829463B (zh) | 2024-03-08 |
US20220355552A1 (en) | 2022-11-10 |
EP4056629A1 (en) | 2022-09-14 |
CN114829463A (zh) | 2022-07-29 |
JP6829848B1 (ja) | 2021-02-17 |
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