Pelletizing in PET Bottle Recycling

A method to improve extrusion of recycled materials like plastics by using a press agglomerator upstream of the extruder to densely and homogeneously fill the extruder screw. The press agglomerator compresses and agglomerates the recyclate to form uniform pellets. This helps prevent air pockets and cavities in the extruded material by compacting the feed and reducing segregation compared to direct extrusion. The press agglomerator can be any type like a die press, roll press, or pelletizer.

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Recycling method for polyester materials like PET that improves subsequent processability and quality compared to traditional methods. The method involves subdividing, washing, and microwave drying the polyester material to reduce moisture content. Then melt extruding with tangential filtration through rotating filters to remove impurities. This prevents clogging and allows effective filtration without pressure buildup. The tangential filtration angle prevents impurities getting stuck in filter holes. By controlling moisture and avoiding clogging, the recycled polyester has better properties like lower IV variation and impurity levels for downstream processes like spinning and molding.

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Abstract The EFSA Panel on Food Contact Materials (FCM) assessed the safety of recycling process Gneuss 5. input is hot caustic washed and dried poly(ethylene terephthalate) (PET) flakes mainly originating from collected postconsumer PET containers, with no more than 5% nonfood consumer applications. are melted in an extruder (step 2), decontaminated during a meltstate polycondensation (MSP) 3) finally pelletised. Having examined challenge test provided, concluded that MSP critical determining decontamination efficiency process. operating parameters to control step 3 pressure, temperature, residence time as well geometrical operational characteristics reactor. It was demonstrated by this ensures level migration potential unknown contaminants into food below conservatively modelled 0.0481 or 0.0962 g/kg food, depending molecular mass contaminant substance. Therefore, recycled obtained not concern, when used at up 100% for manufacture materials articles contact all types foodstuffs, including drinking water, longterm storage room temperature below, without ... Read More

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Polyethylene terephthalate (PET) is commonly used in beverage container manufacturing; however, its classification as a single-use plastic significantly contributes to environmental pollution. Improper disposal results enduring contamination of both terrestrial and marine ecosystems, which poses ecological health risks. Among the methods, recycling, incineration, landfilling, only recycling promotes circular economy by reducing reliance on landfills, alleviating emissions, conserving fossil resources. This study employs life cycle assessment (LCA) method evaluate impacts three PET bottle facilities Taiwan, considering collection, transportation, processing system boundary. It also assesses effects raw material composition, comparing transparent, colored, mixed bottles. The indicate that colorless have lower damage values (16.618.1 mPtkg1 recycled flakes) than those handling colored oil-trapped (25 mPtkg1) due higher energy demands poly aluminum chloride usage wastewater treatment. Granulation was identified significant hotspot for pellets, with value 35 mPtkg1. Inte... Read More

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Device and method for recycling post-consumer plastic waste to produce odorless and contaminant-free pellets for reuse in packaging applications. The process involves shredding, washing, melting, degassing, and granulating the plastic waste. Ozone is added to the melt to oxidize and remove odorants. The ozone concentration is monitored and adjusted to prevent excess ozone emissions. This targeted ozone treatment removes odor-causing compounds from the recycled plastic.

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A method for producing plastic granules suitable for producing extrusion blow molded hollow bodies of recycled PET with high impact toughness and high gloss, and an extrusion process to achieve it. The method involves adjusting the intrinsic viscosity and molecular structure of recycled PET (rPET) to match virgin PET (vPET) in drop test performance and glossiness. The rPET particles are prepared by crystallization in hot air or infrared heat to control branching and molecular structure. The adjusted rPET properties allow comparable drop heights and gloss in blow molded bottles compared to vPET. This allows recycled bottles with similar performance to virgin ones, which is important for sustainability and recyclability.

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A pelletizer to recycle waste plastic into pellets that can be reused in molding processes. The device crushes the waste plastic, melts and extrudes it into wire, cools the wire, cuts it into pellets, and removes moisture. This allows recycling waste plastics into pellets that can be used in injection molding machines.

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A compact and automated plastic pelletizing machine for recycling plastic waste into pellets for further processing. The machine has a fixed housing with an integrated melting extrusion device, pulling cooling device, mechanical conveyance claw, and pellet collection box. The extrusion device melts and forms the plastic into a strip. The pulling cooling device brings the strip into a pool for cooling. The conveyance claw pulls the cooled strip towards the collection box. This integrated design allows efficient and automated pelletizing of recycled plastic with a compact footprint.

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Continuous and efficient plastic pelletizing equipment to recycle waste plastics without needing secondary screening. The equipment has a pelletization chamber with a feed guide, cutting knives, and a screening assembly. Waste plastics are fed into the chamber and cut into pellets. The screening assembly moves left and right to separate pellets by size. Qualified pellets fall into a collection box while unqualified ones stay in the screening assembly. After pelletizing, the baffle assembly rotates to separate and discharge the qualified pellets. Any remaining unqualified pellets are discharged from the side and fed back in for further cutting.

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Recycled plastic raw material packer system optimized for recycled plastics with uneven properties compared to virgin plastics. The system uses digital control and specialized modules to improve packing efficiency and quality of recycled plastics. It has an input hopper with measurement, circulation, primary supply, and foreign matter removal modules. Digital control analyzes real-time measurement data to optimize supply and removal based on pellet properties. This reduces defects and improves packing uniformity compared to simple hoppers used for virgin plastics.

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A plastic raw material conversion method to manufacture recycled pellets from waste plastic. The method involves melting, extruding, cooling, and cutting the waste plastic to form pellets. The extruded plastic is cooled in a bath, then cut into pellet size. This produces high quality recycled pellets with improved properties compared to direct reuse of waste plastic. The process also involves filtering toxic gases during melting/extrusion, replacing hot cooling water, and separating stuck plastic from hoppers.

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Waste plastic flake crushing and sorting system for recycled pellets production that reduces defects and increases economic feasibility. The system crushes waste plastic flakes into smaller flakes, then visually inspects and sorts them to separate out defective flakes. The good flakes are used for high-color products, while the defective flakes are used for black products. This prevents black spots, foreign substances, and color issues in the recycled pellets. The system heats the flakes before crushing to prevent dust. The sorting steps of flipping and double-sided inspection ensure thorough sorting.

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Recycling unsorted plastic waste into useful material like pellets. The recycling machine has a housing, crusher, extrusion system, and pelletizer inside. The machine accepts unsorted plastic waste through the housing inlet. The crusher converts it into smaller pieces. The extrusion system further processes the crushed plastic into compounded material. The pelletizer then shapes the compounded plastic into pellets. The pellets are exited through the housing outlet. This allows recycling of unsorted plastic waste into usable pellets without sorting.

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Pelletizer for producing modified plastics that is environmentally friendly and recycles waste. The pelletizer has features to capture and recycle debris generated during the pelletizing process. A waste pipe collects debris falling from the pelletizer surface. A recovery device inside the waste pipe has slides, blocks, and a collection box to guide debris into the box. A fan circulates air to filter out debris. This prevents small particles from escaping and contaminating the final pellets. The debris collection improves pellet quality and reduces environmental impact.

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Equipment for mixing and processing plastic particles that improves the quality of mixed plastic granules and avoids pollution during pelletizing. The equipment has a mixing feeding device with multiple feeding components to uniformly distribute different types of waste plastics into the processing chamber. It also has a water circulation granulation assembly with a high-pressure cutter that pelletizes the mixed plastics. The water circulation pelletizing prevents pollution compared to traditional dicing methods.

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Waste plastic recycling pelletizing device that reduces damage to cutting blades when pelletizing recycled plastic. The device has a base, chassis, crusher, cooling tank, heating chamber, pusher, closing device, scrap slide, cutting assembly, lifting device, and fan. The waste plastic is crushed, heated, pushed into a chamber, closed, melted, pushed out, cut, cooled, and pelletized. This sequence avoids cutting the hot, solidified plastic and prevents blade damage. The lifting device removes moisture before pelletizing.

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A waste plastic recycling and pelletizing production device that automates recycling and granulating of waste plastics while mitigating environmental and safety issues. The device has a multi-step process with separate chambers for cutting, melting, and pelletizing. It also has an exhaust system with heat recovery, gas treatment, and odor absorption to handle the waste plastic processing gases. This allows cleaner, safer, and more efficient plastic recycling compared to traditional methods.

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Apparatus for making recycled plastic pellets with improved quality. The process involves sorting, pulverizing, stirring, extruding, cooling, and cutting waste plastic to form pellets. The stirring step with a moving pipe agitator helps mix and homogenize the pulverized waste plastic before extrusion. This improves pellet quality compared to directly extruding the pulverized plastic. The stirring also allows loading the extruder with agitated plastic instead of static powder, further aiding mixing.

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A modified recycled plastic pelletizing device to reduce dust generation and improve environmental friendliness during plastic pelletizing. The device has features like a dust collector below the pelletizing chamber, a separate box for collecting defective pellets, and a discharge port to remove fines. This helps contain dust during pelletizing and prevent it from escaping into the processing area. The device also has a feeding hopper, pelletizing unit, and discharge port to separate the pelletizing and discharge steps. This reduces dust generation compared to continuous pelletizing.

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Waste plastic pellet machine with improved granulation efficiency and reduced material clogging. The machine has a body, pellet manufacturing device, feed port, movable reclaiming door, and fixed frame. The pellet manufacturing device has a rotating inner frame with blades and a transition frame. The inner frame rotates to feed plastic into the blades for granulation. The reclaiming door allows access to clear clogged areas. The fixed frame has diffuser fans to prevent material buildup. This design enables uniform granulation, reduces clogging, and facilitates cleaning compared to conventional machines.

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Pelletizing module for plastic recycling granulation lines that allows efficient conversion of waste plastics into reusable pellets. The module has a closed extrusion shell, a top ring with a hollow gear groove, and a bottom plate with an extrusion hole. A granulation blade with multiple teeth is attached to the top ring and meshes with a pinion gear. Molten plastic is extruded through the bottom plate hole, cut into pellets by the blade, and discharged through the groove. This granulating module integrates melting, cutting, and discharge steps into a single unit for efficient recycling.

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Recycled plastic pelletizing device with automated feeding to improve efficiency and reduce manual intervention when pelletizing recycled plastics. The device has a feeding mechanism that moves backward as the cutter lowers to feed more material. This allows continuous feeding without stopping between cuts. The cutter also clamps and fixes the plastic during cutting to prevent deviations. The feeding mechanism moves the plastic into the cutter, then resets and feeds more as the cutter rises. This automatic feeding eliminates the need for external power or manual feeding.

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A waste plastic pelletizing and molding process that improves the efficiency and quality of recycling waste plastics compared to existing methods. The process uses a custom crushing device with features like a cleaning mechanism, symmetrical cutting blades, and a wiping unit to prevent plastic accumulation and improve crushing uniformity. The device has a support frame, guide frame, cleaning mechanism, cutting mechanism, and crushing mechanism. The cleaning mechanism cleans the cutting blades to prevent plastic buildup. The symmetrical cutting blades rotate together. The wiping unit removes plastic from the cutting area. This prevents material from sticking to the blades and ensures consistent cutting and crushing.

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Recycling and granulating plastic products in a more efficient and consistent manner to improve the quality of the recycled plastic pellets. The method involves using specialized equipment like a plastic particle production device that melts and condenses the plastic fragments. This improves melting efficiency by agitating the fragments in the melting box. It also prevents unmelted plastic from entering further processing by using a partition plate. The condensation step is optimized by cutting off the extruded plastic before it enters the water pipe to avoid forming strips that need rework.

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Pelletizing machine for recycling waste plastics that allows efficient and environmentally friendly recycling of waste plastics. The machine has a pelletizing box, feed port, and discharge port. The pelletizing box has brackets at the bottom connected to a fixed frame. A motor connects to the frame. The box has an extrusion cylinder with heating rings inside. The feed port connects to the cylinder. The motor, heating rings, and switch form a circuit. A pulverizing mechanism below the feed port grinds the plastic.

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A pelletizer for thermoplastics with a dual-chute discharge system to improve pellet quality by separating fines from pellets. The pelletizer has a rotating cutter, feed mechanism, and chambers to pelletize material. The discharge chute has a section for pellets and a section for fines. The pellet section is vacuum-connected to separate and remove fines from the pellets. This prevents fines from contaminating the pellets and improves yield and quality. Compressed air near the cutter also helps move pellets into the pellet section.

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Water-cooled granulation equipment for recycling waste plastics that uses flowing water and swing motion to cool and cut the plastics into pellets. The equipment has a water-cooled forming device, storage tank, and air-drying discharger. The forming device molds the softened plastics, cools them, cuts them, and feeds them to the tank. The tank further cools the pellets. Swinging blocks and a scooping mechanism move in the tank to agitate and aerate the pellets. This enhances cooling and drying. The plastics are then air-dried and discharged. The swing motion and water cooling provide better pelletization compared to just air drying.

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Automatic polyester chip pelletizing equipment that improves production efficiency by providing a fully automated process to make polyester chips from resin. The equipment extrudes the resin, cuts it into pellets, partitions it, demolds the pellets, and cools them all in an automated sequence. Features like sliding parting plates, a demolding assembly, and a cooling system allow continuous, automated processing without manual intervention.

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Recycling method for producing high quality recycled PET granules from contaminated PET flakes. The method involves polycondensation of the flakes at high temperature and low pressure to form intermediate PET granules. This is followed by washing, drying, and sifting to remove contaminants. The resulting recycled PET granules have low contamination levels, stable properties, and can be used in applications like food packaging and yarn production. The key process steps are high temperature polycondensation, washing, and sifting.

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A manufacturing method for resin pellets that reduces defects like double-linked pellets, multi-linked pellets, and deformed pellets. The method involves extracting strands of molten thermoplastic resin at specific diameters and speeds, cooling them with refrigerant at specific spacing, and cutting them into pellets. The strand spacing formula closely matches normal distribution for minimal bonding. This prevents bonding and deformation during cooling, improving pellet quality.

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Automatic plastic pellet manufacturing apparatus that improves efficiency and cooling of pelletization. The apparatus has modules for mixing, extruding, cooling, and pelletizing. It automatically feeds, extrudes, cools, and pelletizes plastic without manual intervention. The cooling module has a housing, water supply, and discharge to cool the extruded plastic string. This improves pellet quality by preventing sticking and warping during pelletization. The apparatus also has a transfer roller to move the cooled string to the pelletizer. The modules are connected by conveyors to automate the entire process from raw material to pellet.

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Circular pelletizer for uniformly cutting and collecting plastic pellets without particle size variation and excessive noise. The pelletizer has a cyclic pellet flow path with multiple conveyor belts and a chute to move the pellets through the cutting chamber. This eliminates uneven cutting from tool deformation and offset. The conveyor belts are porous filters to prevent pellet loss. The outer frame has push rods and scrapers to move pellets between belts and prevent buildup. The feed port connects to the first belt and the chute directs pellets into the feed port. This circulates the pellets through the cutting chamber for uniform size without throwing them against the walls.

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Method for producing a homogeneous and secure recycled plastic pellet from heterogeneous waste plastic debris that contains mixed plastic waste with varying properties and potential hazards. The method involves dry mixing waste plastics with specific physical properties in appropriate ratios and extruding them to stabilize and homogenize the plastic. This allows producing recycled pellets with desired properties from heterogeneous waste plastics. It also provides a way to remove hazardous materials during intermediate steps if needed.

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A system for pelletizing solid waste plastic without using a water cleaning process to recycle plastic waste instead of incinerating or landfilling it. The system crushes and filters the plastic waste to remove impurities like metal and wood without water. It then fuses and transports the crushed plastic using rotating shafts with internal heating and cooling. The fused plastic is molded into pellets without further drying. This avoids moisture issues and eliminates the need for costly hot air drying.

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Automated system for recycling and modifying plastic waste into new pellets. The system uses multiple parallel production lines with sampling, weighing, mixing, granulation, and storage steps to recycle plastic waste into modified pellets. The lines allow flexible recycling of different plastic batches. The system has automated weighing, mixing, and sampling steps to accurately match the plastic components needed for the target modified pellet properties. It also has auxiliary agent addition and storage. The automated lines improve efficiency, consistency, and flexibility compared to manual recycling.

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Pellet manufacturing apparatus using waste plastic that allows efficient recycling of any type and size of waste plastic by effectively removing foreign matter that has accumulated on it. The process involves compressing, cutting, cleaning, drying, grinding, washing, sorting, and molding the waste plastic to produce pellets. The compression cut removes foreign matter as it compacts the waste plastic. The cleaning step has grinding, washing, and sorting stages. The grinding stage further cleans the plastic. The drying stage removes moisture. The grinding, washing, and sorting steps together remove debris. The molding step uses the dried and cleaned pellets.

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A simplified, cost-effective, reproducible, and controllable process for making polyethylene terephthalate (PET) pellets. The process involves melting PET resin through polycondensation or recycling, and then allowing the melted PET to cool and crystallize into pellets without any further processing steps. This direct crystallization step creates a thin, smooth, and uniform crystallized surface layer on the PET pellets. The pellets with this surface layer have improved physical properties like reduced moisture absorption, better surface appearance, and reduced sticking compared to unmodified PET pellets.

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