The main characteristics of low-density polyethylene are as follows: (1) The film has a slightly milky white transparent color and is soft. The strength is smaller than high-density polyethylene, while the impact strength is greater than high-density polyethylene. (2) Cold resistance, low-temperature resistance, and high-temperature resistance. The thicker film can withstand the sterilization process of soaking in 90 ℃ hot water. (3) Good moisture resistance, stable chemical properties, and insoluble in general solvents. (4) Due to its high breathability, the storage period of its contents should not be too long when used as food packaging that is prone to oxidation. (5) Poor oil resistance and the product can slowly dissolve and swell. When packaging food containing fat, long-term storage can cause the food to have a pungent taste. (6) Long-term exposure to ultraviolet radiation and heat can cause aging, affecting its physical and dielectric properties. (7) The melting point is 110~115 ℃, and the processing temperature is 150~210 ℃. If in an inert gas, the temperature can reach 300 ℃ and remain stable. But the contact between the melt and oxygen is prone to degradation