PET Nanocomposites in Packaging

A barrier PET plastic with improved gas and moisture barrier properties for packaging applications. The barrier PET composition contains modified activated nano zinc oxide, nano bentonite, amino silicone oil, plasticizer, coupling agent, high molecular copolymer, and hydroxymethylpropane triacrylate. The modified nano zinc oxide and nano bentonite composite provides gas barrier properties, while the other components enhance barrier performance. The specific ratios and amounts of the ingredients can be adjusted to optimize the barrier properties.

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Environmentally friendly barrier film packaging material for food and medicine that provides comparable barrier properties to aluminum foil without electroplating. The film contains polyethylene terephthalate (PET) along with composite barrier materials, dispersants, and auxiliaries. The composite barrier materials are blends of nanomaterials like graphene, mica, and silica. The composite barrier materials are dispersed in the PET matrix using the auxiliaries to create a film with improved gas and moisture barrier properties. The composite barrier materials provide barrier without the need for aluminum foil coating.

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Blended barrier plastic packaging container with improved heat resistance, barrier properties, and mechanical strength compared to pure PET containers. The container is made by blending polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polym-xylylene adipamide (PXA), modified montmorillonite clay, and compatibilizers like grafted polypropylene-maleic anhydride (PP-g-MAH) and grafted polyethylene-maleic anhydride (PE-g-MI). The compatibilizers reduce interfacial tension between the blended phases and improve their compatibility, leading to better heat resistance, barrier properties, and mechanical strength. The PEN and modified montmorillonite increase heat resistance, while PXA improves barrier properties.

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High oxygen barrier polyethylene composite material with excellent oxygen and water resistance, good mechanical properties, environmental protection, and low cost. It is made by combining a hydroxyl-terminated polyester copolymer, montmorillonite-hydrophobic modified nanocellulose composite, and polyethylene. The composite has high oxygen and water barrier properties, tensile strength, and is suitable for applications like polyethylene containers and hoses. The hydroxyl-terminated polyester copolymer improves compatibility with polyethylene. The montmorillonite-nanocellulose composite provides barrier properties.

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High barrier PET material with improved oxygen and water vapor barrier properties. The material is a composite of PET, PEN, HDPE, modified clay, nano-silica, nano-alumina, nano-titanium nitride, antioxidant, dispersant, and compatibilizer. The clay modification involves treating montmorillonite or halloysite clay with aminobenzoic acid or other chemicals to improve compatibility with the polymer matrix. The nano-fillers and compatibilizer help enhance barrier properties beyond what PET alone can provide.

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Antibacterial and anti-aging polyethylene packaging material that combines antimicrobial properties, aging resistance, and biodegradability. The material contains nano-ZSM-5 zeolite, a degradation promoter, a tanning agent, and a toughening agent in addition to the regular polyethylene components. The nano-ZSM-5 zeolite provides antibacterial effects, the degradation promoter enhances biodegradability, the tanning agent improves aging resistance, and the toughening agent maintains mechanical strength.

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Preparation of high-barrier nano-modified PET composite materials for packaging products by in-situ polymerization with nano-materials added during the reaction. The nano-materials are modified graphene sheets treated with surfactants. Adding a small amount of these modified nano-materials (0.01-0.5%) during the PET polymerization significantly improves the barrier properties of the resulting composite material compared to unmodified PET. The modified graphene nano-materials are dispersed uniformly in the PET matrix, which enhances gas barrier properties against CO2 and oxygen.

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High-strength degradable polyethylene packaging material that combines biodegradability with improved strength. The packaging material contains a specific blend of components like bamboo fiber, starch, glass fiber, nano-silica, nano-titanium dioxide, nano-ZSM-5 zeolite, modified chitosan, tanning agent, dispersant, and composite stabilizer. This composition provides enhanced mechanical properties compared to traditional polyethylene while also enabling biodegradability.

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Nanocomposite polyethylene terephthalate (PET) containers for beverages with improved mechanical properties while maintaining transparency. The nanocomposite PET is made by treating kaolin clay with potassium acetate to expand the clay layers. This treated clay is mixed with PET and formed into containers. The potassium acetate-treated clay improves the PET modulus and strength without sacrificing transparency compared to untreated clay. The potassium acetate treatment expands the clay layers to facilitate intercalation of the PET chains.

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High-barrier nano-montmorillonite (MMT) composites of polyethylene terephthalate (PET) with improved gas barrier properties. The composites are made by melt intercalation of lamellar nano-MMT into oriented PET matrix using a specialized twin-screw extruder and die setup. The MMT content is 0.5-5 parts by mass, along with 1-8 parts of a compatibilizing agent like maleic anhydride grafted PE or ethylene-methacrylate-methacrylate terpolymer. The MMT orientation in the PET matrix extends gas diffusion paths, significantly improving barrier properties compared to dispersed MMT composites.

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