The raw materials of the mask should have no odor, and must not use recycled materials. They must not use materials known to cause skin irritation or other adverse reactions. The residual amounts of other restricted substances must not be bleached with chlorine; they are safe to wear.
It is required that the mask should be able to protect the mouth and nose safely and securely, and the mask should not have sharp points and sharp edges that can be touched.
The PTFE filter material for children’s masks made by mechanically stretching PTFE material in Suzhou can ensure the complete interception of impurities such as bacteria and has a large flux.
The material is resistant to high temperatures, strong acids and alkali, and has wide chemical applicability. When used for gas filtration, it can 100% intercept various phages, bacteria and particles above 0.02um.
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