The Secret of Diaper Absorbent Core
Dec 30, 2024
1. First generation diaper core (cotton core):
The first generation diaper absorbence core was formed by mixing fluff pulp with high molecular weight water absorbing molecules (SAP), without layering or partitioning, becoming a traditional core. The first generation core has good water absorption effect, but due to its relatively loose structure and lack of adhesive, it cannot fix the fluff pulp and SAP, so it is prone to clumping and fracturing during use.
2. Second generation diaper core (half core):
The second generation absorbent polymers core is a partition made on the basis of the first generation core, and the thin composite core is covered with fluff and water absorbing molecules SAP underneath, which can play a certain role in fixing the fluff slurry and SAP, thereby reducing the occurrence of clumping.
3. Third generation diaper core (full core):
The third generation super thin absorbent core adopts a composite core structure, consisting of dust-free paper, non-woven fabric, and SAP. The use of composite cores can make diapers thinner and less prone to clumping.
The third generation core is made by bonding each layer of material with hot melt adhesive. The core contains a large amount of SAP to ensure the water absorption of the diaper. After absorbing water, it expands as a whole and is flat without clumping. The disadvantage of using composite cores is that the process is more complex, the equipment production speed is low, and compared to traditional cores, the cost will be higher.
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