Breathable Printed Colorful PE Film For Baby Diaper

The operating principle of the diaper breathable bottom film is simple: inorganic + stretching = micropores. In fact, the operation is very particular, only the right size, evenly distributed micropores are effective.

When the concentration of water vapor on one side of the film is greater than the environment on the other side of the film, a humidity gradient pressure difference is formed. This provides the basic conditions for gas (vapor) convection, and due to the formation of convection, the humidity environment on both sides of the film tends to be relatively balanced. This is the basic principle of the operation of the breathable bottom film.

Secondly, in addition to being breathable, the breathable bottom film is also used as a water barrier film, which has a barrier effect on liquids. Because of the many pathways present in the film, the tortuous channel it forms has a large "aspect ratio" (L/D) value, which can be understood as capillaries. Therefore, in the same liquid (such as water) and the same pressure, as long as the height of the liquid column of the capillary tube is less than the length of the capillary, it can be ensured that the liquid will not leak out, otherwise it will leak

We often say that the breathable bottom film of diapers is the outermost layer with a pattern. Breathable 

bottom film, on the one hand, to prevent the baby's urine from penetrating outside, on the other hand, 

has good breathability, plays a role in emitting stuffiness, and helps prevent the occurrence of baby red 

butt.