High-barrier pet composite material for packaging products and preparation method thereof

Abstract

This invention belongs to the field of packaging material technology, and provides a high-barrier PET composite material for packaging products and its preparation method. The PET composite material, by weight, comprises the following raw materials: 80-90 parts of polyethylene terephthalate, 15-25 parts of modified nano-silica, 1-2 parts of lubricant, and 1-2 parts of antioxidant. The preparation method includes the following steps: Step 1, weighing the polyethylene terephthalate, modified nano-silica, lubricant, and antioxidant by weight and adding them to a high-speed mixer for mixing until uniform, thus obtaining a mixture; Step 2, introducing the mixture from Step 1 into a twin-screw extruder for melt extrusion to obtain the PET composite material. This invention provides a method for preparing a high-barrier PET composite material for packaging products, which has a simple preparation process, readily available raw materials, and is suitable for large-scale production.

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