Extended data:
In the dry cleaning industry, the equipment that mainly uses tetrachloroethylene dry cleaning agent is closed, but different equipment has different ability to recover tetrachloroethylene, and the recovery rate is between 80% and 98%. So tetrachloroethylene will remain on clothes or volatilize into the air.
"In the process of washing and hanging, the recovery rate of tetrachloroethylene by dry cleaning equipment is greater than or equal to 95%." He Yong said that if the concentration of tetrachloroethylene exceeds 50ppm, it will inhibit the central nervous system of human body, cause the disorder of immune and endocrine systems in the body, damage the liver and kidneys, and mutate into carcinogens after entering the soil, posing a potential threat to consumers and employees.
In order to use tetrachloroethylene more safely, dry cleaners should promise that the recovery rate of tetrachloroethylene in the dry cleaning equipment they are about to buy is greater than or equal to 95% when handling business licenses.
Conditional dry cleaners should be equipped with tetrachloroethylene concentration meter to monitor the air in the workplace in real time to ensure the safety of employees.
In addition, for ordinary citizens, it is best to hang dry cleaning clothes for 3 to 6 days before wearing them, depending on the fabric. "The test found that the effective life cycle of tetrachloroethylene in cotton, hemp, viscose fiber and nitrile is 2 days.
In other words, the residual tetrachloroethylene is basically harmless after hanging for 2 days. In addition, it is better to hang silk for about 4 days, nylon and multi-fiber blended fabric, polyester and wool clothes for 6 days. "
References:
People's Daily Online-Dry cleaning clothes should be hung for 3-6 days before wearing.
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