In our daily life, plastic products can be seen everywhere, such as plastic basins, plastic cups, plastic boxes and so on. So how to identify whether it is toxic? There are many methods for identification, such as appearance method, specific gravity method, boiling water method, combustion method, etc. The simpler and more accurate method is combustion method. Today, Jiuzhi.com will introduce it to everyone: Cut the sample one by one, use a tweezers to hold it, burn it on a lit alcohol lamp (such as a non-alcoholic lamp or a lit candle), then observe that it is difficult to burn and leave the fire. After the situation, the flame and the smoke color, the phenomenon of burning and the smell emitted, etc., a comprehensive judgment can be made to know which kind of plastic.
1. Polyvinyl chloride plastic: non-flammable, away from fire, the flame and smoke are green at the bottom, the tip is yellow, and the smell of hydrochloric acid is irritated after the fire.
2. Polyethylene plastic: flammable, separated from fire, flame and smoke, and the bottom of the blue is yellow. When burning, there is a continuous drop of molten material, which gives off a paraffin smell.
3. Polypropylene plastic: flammable, fire from the fire, flame and smoke are orange-yellow, there is a constant drop under the burning, there is a smell of oil.
4. Polystyrene plastic: flammable, burning from the fire, flame orange, black smoke, black carbon, flying into the air, styrene smell.
These are just the results of several common plastic burnings. Of course, there are many plastics that are not listed one by one. I hope the above content will help everyone. Thank you for your continued attention to Jiuzhi Plastics.

Jiuzhi Plastics Network


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