Introduction:When it comes to pull-ups, I believe we are all familiar with them. With its portability and portability, it has gained a large audience upon its launch. With the changing demographics in China, both the infant and adult markets have huge potential. However, when it comes to pull-up pants, we have to mention another concept that is related but rarely paid attention to: the core body. Let's review its development next.
In 1960, Procter & Gamble in the United States combined non-woven materials and fluff pulp as the absorbent core of pull-ups, which was used to a certain extent at that time. In 1980, Japan Unicharm added SAP on the original basis and further upgraded it, so that it not only has a certain liquid absorption performance, but also has liquid retention performance, and this is the first generation of absorbent cores; but the first generation of absorbent cores Due to the relatively simple design and insufficient consideration at the time, it is inevitable that there will be defects. The most important one is that there is no internal stratification, and the liquid absorption is not uniform, resulting in lateral diffusion of urine, and excessive liquid absorption in a certain area, which affects the reverse osmosis performance of pull-ups.
In the second generation, in order to solve the outstanding problems of the first generation. The R&D personnel focused on the balance of liquid suction, and finally made a partition based on the first generation, which can fix the fluff pulp and SAP to a certain extent, and reduce the problem of uneven lumps after liquid suction.
Then, with the development of drylaid paper technology, namely clean paper technology, the third generation of composite absorbent cores combined clean paper with porous bulk nonwoven and SAP. pull-ups becomes thinner due to the hot melt adhesive between each layer of material; it contains a large amount of SAP, and the absorption is greatly enhanced; in addition, thanks to the mesh structure of the porous fluffy nonwoven material, the SAP can be well fixed, ensuring the absorption The core is uniform, absorbs the overall expansion, and the pull-ups surface is flattened. At present, most of the domestically produced products use the third-generation absorbent core.
Finally, it is the fourth generation, which is also the level that the industry has reached at present. The fourth generation is further divided inside the third generation to better fix the layers. Its main feature is to become lighter and more convenient, but the technology is still improving.
Throughout the history of the development of the core, from functional upgrades to experience upgrades, we have reason to believe that the future experience of pulling pants can be more comfortable and more convenient.