The profit of a pack of sanitary napkins of ordinary brands is 15%. You may not need to go to the manufacturer to buy it. There's usually no shortage of one. You have to go through several businesses to get it. That's what I do. I usually earn 10% after I get the price.

Sanitary cotton, also known as sanitary towel, is an absorbent material, mainly made of cotton pulp and polymer absorbent, which is used to absorb menstrual blood flowing out of vagina when women have menstrual cramps.

This layer is in direct contact with the skin and its material is soft. The weaving and indentation on the surface will affect the reverse osmosis effect (dryness) of sanitary napkins.

PE perforated film surface layer and cotton surface layer are the two most commonly used materials. The PE surface layer with micropores can make menstrual blood difficult to seep back and make users feel dry. But the material is hard, and some users will cause allergic reactions. Due to the improvement of absorbent design and the emergence of perforation and composite materials, the market share of PE surface layer is gradually higher than that of sanitary cotton after 200 1.

The inner layer is mainly made of cotton, non-woven fabric, paper pulp or polymer composite paper, which is used to absorb menstrual blood. The design of the side edge is mainly to prevent side leakage, because it will present a certain angle with the tampon body when in use, and it is easier to rub with the groin, so the tampon with soft material side edge is more popular with women.

The back glue of sanitary napkin is made of impermeable material, which can leave menstrual blood in sanitary napkin. In 1970s and 1980s, self-adhesive adhesive was developed to fix sanitary napkins on underwear.

The earliest use of sanitary napkins is a long strip with no ears on both sides. This kind of sanitary towel can be placed by tearing the packaging bag, taking out the sanitary towel and unfolding it, then tearing off the paper tape on the back of the sanitary towel and sticking the sticky side of the sanitary towel to the crotch of underwear.