In daily life, we will find that many plastic products will have some odor when they are first used. For example, some common polyethylene and polypropylene products will have a smoky smell at the beginning of use, and the smell will be much less after a period of use. , Why do these plastic products smell?
These odors in plastics mainly come from the additives added in the plastic manufacturing process. This is due to the addition of solvents and a small amount of initiators and other additives during the polymerization of polyethylene and polypropylene resins. After washing, filtration, etc., sometimes a small amount of the above-mentioned auxiliaries will remain, and in addition, a small amount of low-molecular-weight polymer will remain in the resin. During the molding and processing of plastic products, these substances will be exposed to high temperatures to escape an unaccustomed odor and stay on the surface of the product.
In addition, some manufacturers will add some turpentine as a dyeing aid when plastic dyeing. If it is used too much, the smell of turpentine will also escape from the product. It disappears slowly and has no effect on human health. However, if the smell is too heavy and exists for a long time, it will still have a certain impact on human health.
Therefore, when purchasing plastic products, we must choose plastic products with safe raw materials, good quality and high safety factor.
Post time: May-07-2022
