Recycled PET in Sustainable Packaging

Recycling terephthalate polymers like PET by depolymerization into reusable monomers. The process involves using a catalyst to break down the polymer into monomers. The catalyst is a complex containing a nanoparticle, a linking group, and a catalyst entity. A base is added to the reaction mixture to improve degradation and recovery. The nanoparticle allows magnetic separation of the catalyst. Adding the base prior to catalyst recovery enhances catalyst performance and selectivity.

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Efficiently recycling waste plastic into new polyethylene terephthalate (PET) resin with reduced energy consumption by integrating plastics processing, solvolysis, and PET production. The process involves depolymerizing waste PET in methanolysis to form recycled ethylene glycol and dimethyl terephthalate. These recycled components are reacted in PET production to make recycled content PET resin. The integrated facility allows efficient separation, reuse, and formation of the recycled components.

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Chemical recycling of PET (polyethylene terephthalate) to produce a recycled PET fiber with improved properties like strength and durability compared to traditional recycling methods. The recycling process involves depolymerizing PET waste into terephthalic acid (TPA), dimethyl terephthalate (DMT), and bis(2-hydroxyethyl) terephthalate (BHET). These depolymerized components are then used as raw materials to make the recycled PET fiber. This allows removing impurities like isophthalic acid (IPA) that inhibit crystallization and degradation of the recycled fiber.

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Efficiently recycling waste plastic into new polyethylene terephthalate (PET) using integrated solvolysis and PET production. The process involves depolymerizing mixed plastic waste in methanol to form recycled content ethylene glycol (r-EG) and recycled content dimethyl terephthalate (r-DMT). These are then reacted in PET production to form recycled content PET (r-PET) with inherent viscosity of at least 0.50 dL/g. The r-PET has up to 100% recycled content and properties similar to virgin PET. The integration allows efficient conversion and reduces energy consumption compared to separate solvolysis and PET plants.

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Efficient and cost-effective process for chemically recycling waste plastic into new polyethylene terephthalate (PET) using integrated solvolysis and PET production facilities. The process involves depolymerizing waste PET in methanol to form recycled ethylene glycol (r-EG) and dimethyl terephthalate (r-DMT). These are then reacted in a PET production facility to form recycled PET (r-PET). This integrates the solvolysis and PET production steps to reduce energy consumption and enable closed-loop recycling of PET waste.

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A process for depolymerizing polyesters like PET and polyurethanes like PU by treating them with imidazole at high temperatures in the absence of solvents or catalysts. The imidazole selectively cleaves the ester or urethane linkages to form products like 1-acyl imidazoles from polyesters and 1-carboxamide imidazoles from polyurethanes. This allows recycling of the polymers by breaking them down into useful building blocks rather than just melting and molding them again. The process can be done without solvents or catalysts at elevated temperatures.

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A portable thermoelectric water bottle that generates electricity using the temperature difference between hot and cold liquids stored inside the dual chambers. The electricity is stored and used to charge external devices. The bottle has a thermoelectric generator assembly, a rechargeable power storage unit, and a DC output port. The thermoelectric generator uses peltier plates made of semiconductor materials like bismuth telluride, lead telluride, and silicon germanium. The bottle is made of recycled materials like PET-G. It also has a processor to monitor and display real-time voltage and battery percentage.

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A PET bottle separation and recovery device that sorts and processes used PET bottles to increase recycling efficiency. The device has a holder, transfer unit, crusher, ring separator, and measuring unit. It measures transparency, contamination, and lid presence of bottles. Bottles are crushed and separated based on measurements to optimize recycling. Transparent bottles are shredded in one area, opaque ones in another, and contaminated ones crushed. This allows recycling of transparent shards, shredded opaque sections, and crushed contaminated parts separately.

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Stretch blow-molded articles like toner bottles that prevent degradation of the contained toner powder and prevent wax transfer to the bottle surface when made from recycled PET. The molded articles contain a polyester, wax, and an inorganic layered double hydroxide or zeolite. The wax is adsorbed by the inorganic compound instead of transferring to the bottle surface, preventing chemical attack on the toner particles inside. This prevents deformation of toner particle surfaces when stored in the bottle. By using recycled PET, it reduces environmental impact compared to virgin PET.

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Processing dairy bottle recycling into new dairy bottles to enable closed-loop recycling of dairy packaging. The method involves creating new dairy bottles using recycled dairy bottles in the middle layer. The middle layer is made of opaque recycled plastic, like PET, to block light and preserve vitamins. The inner and outer layers are white for contact with the product. This allows using recycled opaque bottles instead of virgin plastic. The opaque recycled material provides sufficient light blocking.

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Cosmetic product applicator with easy recycling and simplified manufacturing. The applicator has a reusable rod and rod carrier made of a recyclable copolyester like recycled PET. The rod snaps into the carrier. This allows recycling of the entire applicator instead of just the rod. The copolyester is injection molded with a cooling spindle to speed cooling. The spindle channels are cooled to solidify the copolyester faster without deforming. This avoids prolonged cooling times for copolyesters. The snap-fit rod assembly prevents rotation during use.

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Recycling PET bottles to remanufacture a composite masterbatch of polyethylene terephthalate (PET) and ethylene-vinyl acetate copolymer (EVA) for use in foam shoe materials. The composite masterbatch is made by blending recycled PET, EVA, and a compatibilizer in specific ratios, then extruding and cutting the alloy into granules. The composite masterbatch is used to replace virgin PET in shoe foam production, reducing demand for new PET and enabling recycling of post-consumer PET bottles. The composite masterbatch can be adjusted for foam appearance by optimizing mold size.

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A machine to efficiently separate and crush PET bottles made of different materials like cap and body. The machine has an open-top frame with a cutting section at the front to separate the necks. The main body pressing section compresses the bottles after neck separation. A lower frame collects the compressed bodies which are crushed inside. The machine is driven by a unit that synchronizes all parts. This enables separating and crushing PET bottles with caps and bodies made of different materials, generating pure PET flakes with minimized impurities for circular recycling.

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Economical and practical method to recycle waste carbon fiber reinforced polymers (CFRP) and waste polyethylene terephthalate (PET) like water bottle waste into composite filaments with improved mechanical properties compared to recycled PET alone. The recycling involves shredding, grinding, mixing, and extruding the waste materials to produce composite filaments with 10-40% carbon fiber content. This process improves properties like elasticity modulus, yield strength, tensile strength, and toughness compared to pure recycled PET.

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Gas barrier film for packaging that reduces environmental impact and improves barrier properties compared to traditional films. The film contains chemically recycled polyester with specific intrinsic viscosity and melting point ranges. It also has a thin inorganic coating. The chemically recycled polyester allows using recycled material with lower environmental impact. The viscosity range prevents excessive stretching forces during film production that can cause breaks. The higher melting point improves heat resistance. The thin inorganic coating further improves barrier properties.

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Biaxially oriented polyester film containing chemically recycled polyester with low melt resistivity to prevent pinner bubbles during production. The film has 20-95% chemically recycled polyester and an alkaline earth metal-phosphorus ratio of 1.0-5.0. It reduces environmental impact by using recycled polyester and allows high film production speed without bubbles. The film can be used in laminates for packaging containers.

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Biaxially oriented polyester film with improved strength and reduced breakage during production, containing chemically recycled polyester with specific properties. The film has an intrinsic viscosity of 0.50-0.70 dl/g and melting point of 251°C or higher. This reduces stress during stretching and prevents film breakage. The chemically recycled polyester content is 20% by mass or more. The film can be used in laminates and packaging containers. The recycled content reduces environmental impact.

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Recycling system for transparent PET bottles that allows only pure PET resin particles to be extracted for recycling. The system is installed in common facility recycling points. It involves washing, crushing, screening, drying, and collection steps. Bottles with labels removed go through washing, then crushing to shreds. Screening removes impurities. Drying removes moisture. The pure PET particles can then be collected for recycling. This prevents contamination from adhesives and labels, making the recycled PET more valuable.

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Packaging blends for clear PET bottles that can be recycled into clear PET without degrading quality. The blends contain a polyester like PET and a second polymer that forms a separate glass transition temperature. This prevents the second polymer from interfering with PET recycling. The blends can have high haze or opacity for opaque packaging. To recycle, the blends are treated to reduce opacity and transesterify the second polymer into the PET. This converts back to clear PET for recycling.

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Microwavable food package with steam vent and easy opening. The package has a base layer made from recycled PET and a heat-sealable layer. It has an opening guide on the back seam to help tear open the package. The opening starts at a designated point. The guide prevents the tear from extending too far. The recycled PET base reduces environmental impact. The guide allows a wide opening and using the package as tableware.

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