The first change in the core layer of diapers is thinner, lighter and narrower. The absorbent core layer is an important factor to measure the quality of a diaper. In the past, the general trend in the development of the core layer of diapers is to make the product narrower, thinner and lighter. Whether it is a foreign brand or a domestic brand, the new products launched are ultra-thin, ultra-thin, and ultra-thin as the starting point for publicity. The second change of core layer is the change of material. In the domestic market, the absorbent core of diapers is mainly composed of pure wood pulp (fluff pulp) and super absorbent resin (SAP) in a layered structure. In the future, the core material of diapers will change in a diversified direction, adding more fiber materials. For example, bamboo charcoal is used as a chip in bamboo baby diapers to achieve the effects of removing peculiar smell and automatically adjusting humidity. Another core layer change is the change in response to urine leakage, namely the 3D core layer geometry. Compared with ordinary diapers with a flat core layer, the 3D core layer geometry can reduce the chance of urine leakage after side leakage. Previous: Moms should know how to choose a good diaper Next: The structure and hygiene requirements of sanitary napkins