Plastic is a relatively light material with a relative density ranging from 0.90 to 2.2.

Food plastic bottles are a general term for products made of plastic as the main raw material, processed into daily life, industrial products, etc., including injection molding, suction molding, and other plastic products. Plastic is a pliable synthetic polymer material.

It, along with synthetic rubber and synthetic fibers, forms the three essential synthetic materials in daily life. Specifically, plastic is mainly composed of synthetic resin, with various additives added, and can be molded into shape under temperature and pressure, and maintain its shape at a certain temperature. Compared with other materials, plastic has the following performance characteristics:

Lightweight.

Plastic is a relatively light material with a relative density ranging from 0.90 to 2.2, especially foamed plastic. Due to its small pores and light texture, the relative density is only 0.01, and plastic can be used to produce products that need to reduce weight.

Good chemical stability.

The vast majority of plastics have good corrosion resistance to chemicals such as acids and alkalis, especially polytetrafluoroethylene (F4), commonly known as the "plastic king," which has excellent chemical stability and will not deteriorate even after being boiled in water for more than ten hours. F4 is an ideal corrosion-resistant material because of its excellent chemical stability. For example, F4 can be used as a material for conveying corrosive and viscous liquids in pipelines. Therefore, plastic is widely used in the food packaging industry, such as beverage bottles.