Copolymer PET in Packaging

Resin composition, molded articles, laminated films, and packaging containers with improved impact resistance and welding strength. The composition contains a polyester resin, a polyethylene resin, and a compatibilizer with an epoxy group. The polyester resin is modified with a dialkyl-substituted diol. This composition can be used to make molded products, laminated films, and packaging containers with improved impact resistance and welding strength compared to using just polyester resin. The sea-island structure of polyethylene islands in a polyester matrix further improves impact resistance.

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Packaging container with improved impact resistance and weld strength compared to containers made solely from polyester or polyamide resins. The container has a molded article made from a resin composition containing a modified polyester resin, polyethylene, and an epoxy-containing compatibilizer. The molded article is joined to a torso with a layer of the same modified polyester resin. The modified polyester resin is a polyethylene terephthalate with dialkyl substitution. The sea-island structure of polyester and polyethylene in the molded article provides strength and impact resistance. The modified polyester layer on the torso improves weld strength.

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A polyester copolymer with improved strength and heat resistance for packaging and containers applications. The copolymer has a specific composition of dicarboxylic acid (terephthalic acid) and diol components. It contains 4-20 mol% of child carbide, 65-85 mol% of cyclohexanedimethanol, and 11-31 mol% of an acyclic diol relative to the total diol component. This composition provides the desired balance of crystallinity, strength, and heat resistance for containers like carbonated beverage bottles.

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A polyester copolymer with improved chemical resistance and transparency compared to conventional polyethylene terephthalate (PET) resins. The copolymer contains a first repeating unit represented by Chemical Formula 1, along with either a second repeating unit represented by Chemical Formula 2 or a third repeating unit represented by Chemical Formula 3. The copolymer has a specific composition ratio satisfying Mathematical Formula 1. The copolymer is prepared by melt polycondensation followed by optional solid-phase polymerization. The copolymer finds applications in containers, bottles, and other articles where high chemical resistance and transparency are required.

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A high-barrier polyethylene resin composition for packaging applications with improved gas barrier properties. The composition contains 60-80 parts of polyethylene, 5-20 parts of liquid crystal polymer (LCP), and 5-20 parts of polyethylene terephthalate (PET). The LCP and PET disperse in the polyethylene matrix to create a tortuous path for gas diffusion, enhancing barrier properties. The composition can be prepared by blending the components in specific ratios and using multiple extrusion steps to stabilize the dispersion.

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Block copolymer to improve adhesion between co-extruded layers of polyethylene and polyethylene terephthalate in laminates like packaging materials without the need for tie layers. The block copolymer has a structure with a polyethylene block connected to a poly(vinyl acetate) block. Adding this copolymer to one of the layers in co-extrusion improves adhesion between the PE and PET layers. The copolymer acts as a tie layer during extrusion to bond the PE and PET together.

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Ethylene copolymer with improved properties like creep resistance, toughness, and processability for packaging films and bags. The copolymer is made by catalyzed polymerization of ethylene with alpha olefins like 1-hexene. The copolymer has a single peak in its GPC curve indicating uniform molecular weight distribution. This homogeneous melting behavior improves anti-creep resistance. The copolymer also has a density range of 0.918-0.935 g/cm3. This ethylene copolymer offers a balance of film rigidity, toughness, and processability for packaging applications.

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Resin composition and molded products for packaging materials that have improved flexibility and moldability while preventing adsorption of active ingredients like chemicals and lotions. The composition contains isophthalic acid-modified polyethylene terephthalate (PET) with an olefin-based compatibilizer and polycarbodiimide compound chemically bonded to both ends. This composition provides flexibility and moldability without adsorbing active ingredients like PET does. The molded products can be films, sheets, containers, or other shapes.

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Polyester resin composition for blow molding applications like bottles with improved impact resistance and recyclability compared to traditional PET bottles. The composition contains ethylene terephthalate as the main repeating unit with 2-20 mol% isophthalic acid copolymerization. It has an ultimate viscosity of 0.7-1.4 and a molecular weight-average-molecular-weight ratio of 1.9-2.5. A core-shell impact resistance improver is added in 0.1-5% weight. This composition allows blow molding without drawdown and uneven thickness issues while maintaining impact resistance and recyclability compared to PET.

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