Pet Caps

The plastic caps are usually made of Polyethylene Terephthalate, Polypropylene, Low-Density Polyethylene, High-Density Polyethylene, Polyvinyl Chloride, Polystyrene and Polycarbonate. Polyethylene Terephthalate (PET) is non-toxic, light in weight, strong and durable, environmentally friendly and recyclable. The cap is a hard plastic, either high density polyethylene (HDPE), or polypropylene, while the bottle is made of polyethylene terephthalate (PET). These plastics have very different melting points, 260oC for PET and 140-150oC for HDPE and polypropylene. A plastic bottle is a bottle constructed from high-density or low density plastic. Plastic bottles are typically used to store liquids such as water, soft drinks, motor oil, cooking oil, medicine, shampoo, milk, and ink. The size ranges from very small bottles to large carboys.