Low density sponge usually refers to polyurethane foam, which is a light and easy-to-process material and widely used in various fields, including furniture, automobiles, aerospace and so on. Although the low-density sponge itself is usually non-toxic, in some cases, it will cause certain harm to the human body.
In the process of producing low-density sponge, some chemicals and additives, such as tdi and polyol, will be used. These substances will release harmful gases, such as formaldehyde, when burning at high temperature, which is harmful to human health.