the porosity of perforated film

Have you ever wondered how sanitary napkins can maintain their absorbency while keeping us dry and comfortable? The secret lies in a small design on sanitary napkins perforated film.   Perforated film sounds like a film with many small holes on the sanitary napkin. Yes, you understand it correctly! It is usually made of polyethylene (PE), a natural and environmentally friendly material. These micropores are designed to be both delicate and practical. They are like small "vents" that allow sanitary napkins to absorb menstrual blood while maintaining breathability and reducing moisture and odor. Imagine that if the sanitary napkin does not have a perforated film, it will be like an airtight "small bag". After the menstrual blood is absorbed, moisture and heat will be "stifled" inside, which will not only make us feel stuffy and uncomfortable, but also easily breed bacteria and affect health. With perforated film, these problems are solved. However, the porosity of perforated film is also a science. If the porosity is too large, the liquid may permeate back to the surface; if the porosity is too small, it will affect the breathability and absorption speed. Therefore, sanitary napkin manufacturers must carefully calculate and design to make sanitary napkins that are both comfortable and safe!   Next time you use a sanitary napkin, think about those tiny and magical perforated films that are silently protecting your dryness and comfort. Although they are inconspicuous, they are an indispensable part of sanitary napkins, making our lives better and more comfortable.