Polyethylene terephthalate (PET) is a highly crystalline polymer with a milky white or light yellow color. Its surface is smooth and shiny, with good creep resistance, fatigue resistance, friction resistance, low wear and high hardness. It has the greatest toughness among thermoplastic materials; Good electrical insulation performance, less affected by temperature, but poor corona resistance. Non toxic, weather resistant, stable against chemicals, and high moisture absorption. PET bottles are widely used due to their high strength, good transparency, non-toxic, impermeable, lightweight, and high production efficiency.