BASF defines a sustainable diaper absorbent system that uses less superabsorbent polymer

CLOVERDALE, CA, March 19, 2020-

In order to obtain good fluid distribution in high superabsorbent content, thin diapers, developments have resulted in diapers made with highly permeable superabsorbent particles (SAP). The highly permeable and surface crosslinked SAP particles aid fluid flow and reduce gel blocking.

The downside, however, is a loss in absorption capacity and typically a reduction in absorption speed compensated by higher amounts of superabsorbent per diaper. Surface crosslinked absorbent polymers also require more unit operations in the process including surface crosslinking and additional mechanical gel treatment to avoid slow swelling. Recycling of surface-crosslinked polymer particles such as fines and broken larger pieces negatively impacts the quality of the superabsorbent.

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