Especially in the medical industry, the breathability of non-woven fabrics is poor, and plasters made of them cannot meet the normal breathing of the skin and lead to allergic symptoms in users, and the poor breathability of medical tapes such as Band-Aids can cause microorganisms near wounds to multiply and lead to wound infections, and the poor breathability of protective clothing can greatly affect their The poor breathability of protective clothing will greatly affect the comfort of wearing. Therefore, strengthening the testing of the breathability of nonwoven fabrics is one of the important measures to ensure that the products produced meet the requirements of use.