PET sheet is a new type of material developed in recent years. With its excellent toughness, high strength, high transparency, recyclability, and excellent environmental performance of burning and not producing harmful gases, it has gradually been greatly appreciated by consumers and producers. Green ignorance; conform to the trend of environmental protection. PET sheet has the following main features: 1. It has excellent finish and good display effect. 2. Excellent surface decoration performance, can be printed without surface treatment, easy to suppress patterns and easy to metal treatment. 3. It has good mechanical strength. 4. Good barrier performance to oxygen and water vapor. 5. Good chemical resistance and can withstand the erosion of a variety of chemical substances. 6. It is non-toxic and has reliable hygienic performance. It can be used for packaging food, medicine and medical equipment, and it can be Y-ray to sterilize the packaged items. 7. It has good adaptability to environmental protection and can be recycled economically and conveniently; when its waste is incinerated, no harmful substances harmful to the environment will be produced. The thermoforming performance is good, which is comparable to ordinary PVC sheets, and can be vacuum formed to produce PET thermoformed products with excellent performance; PET sheets are considered to be an ideal packaging material that meets the requirements of environmental protection. Performance parameters: 1. Density 1.33g/cm oxygen permeability 4-4.5cm*mm/(m*24h*0.1mpa) 2. Tensile strength longitudinal 53MPA moisture permeability 3G*mm/(M*24H); transverse 53MPA maximum operating temperature is nearly 70 degrees 3. The elongation at break is 250% in the longitudinal direction and 250% in the transverse direction 4. The heated size changes longitudinally 5% and transversely 5%