Amorphous PET in Packaging Materials

A high ductility PET material for applications like packaging and fibers that has improved impact strength and toughness. The PET material is prepared by mixing PET resin with small amounts of acrylic ester polymer, toughening agent, antioxidant, and lubricant. The specific ratios are: 0.1-1 wt% acrylic ester polymer, 0.1-10 wt% toughening agent, 0.1-1 wt% antioxidant, 0.1-3 wt% lubricant, with the remainder being PET resin. The exact ratios can vary within these ranges. The PET resin used has an intrinsic viscosity of 0.50-0.68 dL/g. The acrylic ester polymer improves PET properties

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Crystallizable shrink film compositions for labeling containers like bottles that can be recycled without clumping with PET flakes. The crystallizable film blend contains a crystallizable polyester and an amorphous polyester. The crystallizable polyester has specific ratios of terephthalic acid, neopentyl glycol, 1,4-cyclohexanedimethanol, ethylene glycol, and diethylene glycol. The amorphous polyester has other glycols. The blend allows the film to stretch and crystallize during recycling without sticking to PET flakes.

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Packaging material for molding applications like battery cases that provides improved formability and electrolyte resistance compared to conventional materials. The packaging material has a layered structure of an outer substrate, inner sealant, and barrier layer. The outer substrate is a biaxially stretched polyethylene terephthalate film that meets specific strength requirements. The inner sealant layer contains a thermoplastic resin like polyethylene or copolymer of propylene and ethylene. The inner sealant layer is adhered to the barrier layer using a chemical conversion treatment followed by an inner adhesive layer. The conversion treatment and adhesive enable bonding the layers without cracks or pinholes during molding. The outer substrate strength formula is MB+TB >= 1000 MPa and |MB-TB| <= 30 MPa.

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Toughened APET (amorphous polyethylene terephthalate) plastic packaging material with improved impact resistance and processability. The material composition includes APET (55-70%), PEN (15-30%), PBT (3-7%), compound flexibilizer (5-15%), and a composite toughener made of chlorinated polyethylene (10-20%), flexibilizer PTW30-40%, and MBS (40-60%). The composite toughener enhances toughness without degrading APET's environmental benefits. The method involves mixing and extruding the components at controlled temperatures.

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