Basic structure of sanitary napkin

The sanitary napkin mainly includes a surface layer, an absorbent core, and a bottom layer of three-layer structure, and the materials of each layer are bonded with hot melt adhesive. The outermost layer (i.e. the bottom layer) is a non-woven fabric, which is soft. Inward is a leak-proof membrane (composed of waterproof paper or polyethylene film). Further inward is the fluff pulp mixed with polymer water-absorbing agent wrapped with toilet paper, which constitutes a strong absorber. Once menstrual blood penetrates into this layer, it will be firmly attached and will not be reversed or scattered. There is also pressure-sensitive tape (adhesive) on the back of the sanitary napkin, which is lined with the release paper. When using, just tear off the release paper and throw it away, and then stick the tape on the underwear to prevent slipping.