How to identify the quality of plastic storage box

The simplest identification method of plastics is combustion identification method. The following are the combustion characteristics of several plastics. You can clamp a small piece of plastic with tweezers and observe its combustion characteristics after ignition.

Polyethylene: it is easy to burn. It continues to burn after leaving the fire. The flame is yellow at the upper end and blue at the lower end. There is melting dripping and the smell of paraffin burning.

Polypropylene: it is easy to burn. It continues to burn after leaving the fire. The flame is yellow at the upper end and blue at the lower end, with a small amount of black smoke, melting dripping and petroleum smell.

PVC: difficult to burn, extinguished immediately after leaving the fire. The flame is yellow at the upper end and green at the lower end, with white smoke, softened surface and pungent sour taste.

Polystyrene: it is easy to burn. It continues to burn after leaving the fire. The flame is orange yellow, thick black smoke and carbon beam. It has softening and foaming phenomena, and has a special smell of styrene monomer.

Plexiglass: it is easy to burn. It continues to burn after leaving the fire. The flame is light blue and the top is white. There are softening and foaming phenomena, and there is a strong smell of flowers and fruits and rotten vegetables.