The production principle and common materials of plastic bottles

The plastic bottle is made of polyester (PET), polyethylene (PE), polypropylene (PP) as raw materials, after adding the corresponding organic solvent, after being heated at high temperature, it is blown, squeezed, or injection molded through a plastic mold. plastic containers. Plastic bottles have the characteristics of being unbreakable, low cost, high transparency, and food-grade raw materials. When using plastic products, pay special attention to avoid contact with vinegar, detergents, etc., avoid direct sunlight, high temperature, etc., to avoid chemical reactions. In addition, when you buy plastic tableware, you should choose plastic products with PE (polyethylene) or PP (polypropylene) labels, few decorative patterns, colorless and odorless, and smooth surface.
The plastic bottle is easy to carry, not afraid of falling, has the characteristics of acid and alkali resistance, convenient production, and is also conducive to recycling. There are many ways to manufacture polyethylene, and the most common one is to polymerize ethylene at a high temperature of 200 to 300 °C and a pressure of 1000 to 2000 atmospheres. In polyethylene, no other substances are doped. The polyethylene obtained in this way has low density, soft texture, and high stability to sunlight, air, moisture and chemical reagents, so there is no need to add stabilizers and plasticizers, and stabilizers and plasticizers are mostly Poisonous or highly toxic.