With the development of national conditions, China's diapers are superior in technology. When most of the big brands are "second-generation cores", domestic brands "evolve" to "fourth-generation cores". For diapers, the absorption core is The most important component of diapers is also the decisive factor in determining the quality of diapers. The fourth generation core is further partitioned on the basis of the layering of the third generation core. Compared with the first and second generation diapers, the third and fourth generation diapers have better reverse osmosis resistance, large absorption capacity, and better absorption speed than the first and second generation diapers, and the overall performance is more dominant.