Compared with polyester PET, its polymer PEF has better gas barrier properties and mechanical strength. At the same time, PEF is made of bio-renewable resources. Compared with PET, the production of PEF can reduce the use of nonrenewable resources by about 40-50%, while reducing greenhouse gas emissions by about 45-55%. It is degradable, recyclable and non-toxic, harmless and environmentally friendly materials.