Advancements in Polyethylene Terephthalate Nanocomposites

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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Easy-print packaging sheet made by flash spinning with improved properties like burst resistance, light shielding, and printability compared to traditional extruded sheets. The sheet contains a small amount of carbon nanoflower packaging material dispersed in the polymer. The nanoflower material fills gaps in the fiber texture, reduces motion between polymer chains, and improves burst resistance. It also fills gaps in the texture surface, making it smoother for printing. The nanoflower material content is optimized to balance properties like smoothness, drape, burst index, and light shielding.

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Packaging composite for improved mechanical properties like tensile strength and elongation, without compromising barrier properties. The composite contains 0.01-1.0% graphene, 1.0-10% fatty acid amide slip additive, and a polymer. This composite is useful in packaging applications like films, wrappers, and containers. The graphene enhances mechanical properties, and the slip additive reduces friction. The fatty acid amide slip additive is preferred.

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A packaging material that enables non-destructive food quality detection without opening the package. The material has layers that amplify spectral signals. It includes a flexible base, an adhesive layer, a transparent conductive layer, and a nanostructured layer. The transparent conductive layer and nanostructured layer amplify spectral signals for non-destructive food quality detection through the package. The amplification allows detecting food quality inside sealed packages without opening them.

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Barrier laminate film for packaging applications that provides improved gas barrier properties, puncture resistance, and adhesion compared to existing films. The film has a substrate made of polyester with specific stiffness and thickness requirements, a vapor-deposited layer containing metal or inorganic compounds, and optionally a gas barrier coating. The substrate stiffness and polyester composition prevent film stretching during production and provide good puncture resistance. The deposited layer on the substrate forms a gas barrier. Adding a gas barrier coating further improves gas barrier properties. The vapor deposited layer can have a transition region with controlled aluminum content to prevent layer destruction due to thermal stress.

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A gas barrier film for packaging applications like retort food packaging that provides excellent gas barrier properties and is suitable for dry lamination processes. The film has a deposited silicon oxide layer sandwiched between a polyester film substrate and a gas barrier coating. The silicon oxide layer reduces warping of the film during processing and sterilization. The barrier coating has a thickness of 100-1000 nm and the silicon oxide layer is 10-50 nm. This prevents curling during hot water treatment and enables dry lamination without overlap.

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Manufacturing method for recycled solid polymer particles with improved properties for recycling post-consumer PET waste. The method involves adding a specific type and size of porous carbon material to the PET during mixing, followed by dilution and solid-state polymerization steps. The carbon enhances the intrinsic viscosity of the recycled particles, making them more suitable for further processing and applications. The carbon material is 300-500 nm in size with 300 m2/g surface area.

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Bottle cap with antibacterial and deodorizing properties to prevent bacterial growth in the mouth of the bottle. The cap contains an antibacterial component made of fly ash, sericite powder, rice straw ash, and silver nanopowder mixed with the cap's polyethylene terephthalate (PET) material. The antibacterial components provide antimicrobial and deodorizing benefits when incorporated into the cap. The fly ash, sericite powder, and rice straw ash contain silicon dioxide that forms a watertight compound with other materials. The silver nanopowder has strong antibacterial properties. The antibacterial component is mixed in a specific range (20-30 parts per 100 parts PET) to prevent agglomeration and maintain cap strength.

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Packaging material with improved ink adhesion for digital printing on gas barrier layers. The packaging material has a structure of substrate film, gas barrier layer, and coat layer. The coat layer contains particles with 5-100 nm size and roughness of 100-1000 nm. This anchoring effect promotes adhesion between the printed surface and digitally printed layer. The coat layer can also contain zinc particles for retort odor absorption.

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Intelligent label for perishable product packaging that provides accurate residual life information without the need for expensive silicon electronics or special disposal. The label has sensors to monitor environmental conditions and product degradation inside the package. It uses organic electronics like conductive polymers and nanomaterials instead of silicon. The label is integrated into existing packaging and can be detachable for disposal. It avoids special waste and costly electronics. The label communicates residual life via visual indicators like color changes rather than expiration dates. It aims to improve product safety, compliance, and waste reduction in perishables like food, drugs, and cosmetics.

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Packaging composite for protecting food and other goods from microbes for longer durations. The composite has three layers: an outer PET layer, an inner EVA layer, and a middle layer of metal oxide nanoparticles. The nanoparticle layer is sandwiched between the PET and EVA layers. Spreading the nanoparticles onto the EVA layer and heating them bonds them to the film. This composite provides broad-spectrum antimicrobial activity against bacteria, fungi, and algae like Schizosaccharomyces pombe, Torulaspora delbrueckii, Staphylococcus aureus, Bacillus subtilis, Listeria monocytogenes, and Serratia marcescens.

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Bottle design to prevent microcracks from forming and leaking in drink bottles. The bottle has stiffening ribs in the body between the bottom and neck. The ribs have holes drilled into them with specific dimensions. The holes are filled with a mixture of polytetrafluoroethylene and titanium dioxide nanotubes. This reinforces the ribs without forming microcracks. A protective layer of the nanotube mixture is applied to the rib surfaces. When the bottle is heated or cooled, it prevents microcracks from forming in the ribs. The nanotubes fill any existing microcracks and reinforce the ribs. The protective layer prevents new microcracks from forming at the rib edges.

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Using calcium oxide nanoparticles obtained from natural food waste like eggshells and clam shells as an antimicrobial agent in polymer nanocomposites for food packaging and surface coatings. The nanoparticles are synthesized by mechanical treatment of the food waste to extract calcium carbonate, which is then converted to calcium oxide. These nanoparticles can be incorporated into polymers like LDPE, PLA, and PET to form antimicrobial nanocomposites. The nanoparticles provide biocidal properties against bacteria and fungi. The nanocomposites can be used in food packaging films to extend shelf life and coatings for surfaces prone to contamination.

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Pouch film for long-term storage of liquor that prevents alcohol evaporation and oxidation. The film has a multilayer structure with an inner skin in contact with the liquor that blocks gas passage. The inner skin has thin PE layers sandwiched by thicker PE layers. The outer skin is PET with aluminum and additional PET layers. The inner skin prevents alcohol escape, while the outer skin provides barrier properties. Cellulose nanofibers in the outer layer enhance strength. The multilayer construction provides excellent gas barrier properties to keep liquor fresh for a long time.

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Polymeric nanocomposite containing virgin and recycled PET with clay that improves properties of recycled PET composites. The nanocomposite has a specific ratio of 20% virgin PET to 80% recycled PET, with 1% clay by weight. This composition allows using recycled PET in applications like packaging where virgin PET is typically used. The clay reinforces the composite to match virgin PET properties. The clay also improves barrier and reduces volatiles release. The nanocomposite is prepared by melt mixing virgin and recycled PET with the clay.

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Polyester resin composition for making clear preforms, bottles, and containers with rapid reheating time during molding process while maintaining high color and clarity. The composition contains a polyester resin with a carbon black additive having an average particle size of 100-160 nm. This carbon black, preferably lamp black, provides rapid heating without significantly reducing color or clarity compared to other carbon black reheating additives.

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A transparent packaging material that blocks UV and water vapor to extend shelf life and preserve product quality. The material consists of a transparent polymer film, an adhesive layer, a UV blocking coating, a printed layer, and a transparent vapor deposition polyester film. The UV blocking coating contains organic-inorganic hybrids and UV absorbers. The printed layer uses an adhesive composition. The vapor deposition polyester film has reduced graphene oxide. This stacked structure allows viewing the contents while blocking UV and water vapor.

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An adhesive composition for laminated films used in packaging applications that provides both high visible light transmittance and high ultraviolet absorption while having excellent adhesive strength and low extractability. The composition contains a polyester polyol, a polyisocyanate, and an ultraviolet absorber containing zinc oxide with an average particle size of 10-80 nm. The specific polyester polyol, zinc oxide particle size, and composition ratios provide good dispersion stability and prevent settling or separation of the ultraviolet absorber. The laminated films made from this adhesive have high UV blocking and light transmittance.

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A transparent packaging material with UV and water vapor barrier properties for preventing quality deterioration of packaged products. The packaging material has a transparent polymer film, an adhesive layer, a UV-blocking coating layer, a printing layer, and a transparent deposited polyester film. The UV-blocking coating layer contains a sunscreen compound like benzotriazole. The transparent deposited polyester film has reduced graphene oxide to further block water vapor. This packaging material allows viewing the contents while preventing quality deterioration due to UV and moisture.

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Barrier resin film with improved gas barrier properties without the need for multiple layers. The film consists of a base resin, such as recycled PET, and a thin aluminum oxide vapor deposited film. The aluminum oxide film has a specific elemental bond structure ratio that enhances gas barrier properties. The film can be produced by pretreating the base resin with plasma and then depositing the aluminum oxide film. This allows a single-layer barrier film with comparable performance to multilayer films.

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