Are sponges in underwear harmful to the body?

Some women's underwear and bras contain some sponges, which can have a certain impact on health. Therefore, when purchasing this kind of underwear, you must buy regular products. If it is a low-quality bra, the sponge often contains excessive amounts of chemicals, which can have adverse effects on health and can easily cause allergies to women's breasts, and may even cause greater harm.

1. Let’s take a look at the origin and composition of sponges.

PU sponge cups are made from the following four raw materials:

1. Polyol or polyether

2. TDI toluene diisocyanate

3. Foaming agent

4. Various chemical additives.

TDI Toluene Diisocyanate (banned product during the Olympic Games)

TDI is a highly toxic chemical. Although there is no direct evidence that TDI is related to breast cancer, animal experiments have shown that TDI is absorbed by mice and decomposes into TDA (toluenediamine) when heated. TDA is a recognized carcinogenic chemical. Experiments have also proven that abnormal presence of TDA can be detected in the urine of workers operating in a TDI environment.

There is always a threat that trace amounts of TDI gas emitted from the PU sponge cups could be absorbed by the breasts through the skin. Although there is no way to prove it. However, my country's quality inspection units require that newly renovated homes be tested for the concentration of TDI volatile gases, which are emitted from PU wood paint, and the toxicity of TDI is also apparent. )

TDI is very harmful to human health. Long-term and large-scale exposure can lead to the risk of allergies, which are irreversible because they are a reaction of the immune system, different from general irritation allergies.

TDI can also easily react with other substances in an exothermic manner and release CO2, posing a risk of burns and gas pressure, as well as causing a serious greenhouse effect.

During the production of sponges, the volatilized gases of CFC series foaming agents seriously damage the ozone layer of the atmosphere, causing the temperature of the earth to rise sharply and changing the environment that is beneficial to human life. Although no substitutes with the same cost-effectiveness have appeared so far, Chinese law has stipulated that the use of CFC series foaming agents that destroy the ozone layer will be completely banned in 2010.

4. The disadvantage of sponge bras is that they harbor dirt and filth.

Due to the unstable molecular structure of the sponge, it is very easy to turn yellow, and almost no manufacturer uses PU sponge to make plain white bras (without lace or other coverings). Also, due to the honeycomb structure of the sponge, it is tightly organized and not easy to breathe. When you sweat, water molecules are stored in the honeycomb, creating a stuffy feeling. Not only is it difficult to dry, but it is also easy to harbor dirt and become a breeding ground for bacteria.

5. Sponge bras cannot be cleaned thoroughly.

Sponge underwear has strong adsorption capacity and is made of petroleum waste. When you wash it, the sponge is quietly absorbing detergents, soaps and other cleaning products. No matter how you wash it, it will not be thoroughly clean. Our chests breathe mainly through the nipples. Just imagine what would happen if our nipples were surrounded by clean elements and dirty things for a long time. The consequences would be serious.