SUMITOMO SEIKA CHEMICALS COMPANY, February 21, 2025-

Sumitomo Seika Chemicals Company, Limited. (“the Company”) has developed new super absorbent polymers or SAP (“Developed Product”) at a laboratory level that enables disposable diapers to achieve higher water absorption and offers such benefits as helping reduce the total volume of used diapers that may be discarded. The Company plans to provide product samples to customers and others for their feedback on the product performance. 

1. Objectives of Development
Disposable diapers are structurally designed so that the SAP contained inside instantly absorbs water from human waste when they come into contact with each other, capable of being used without leaks, typically up to urination of three times or so. If urination frequency goes higher, however, the gaps between the SAP particles are gradually reduced owing to the particles swelling by absorbing a large amount of water, causing a problem of further water permeation inside the diaper being prevented. As a result, water fails to spread throughout an entire area of the SAP contained, giving rise to insufficient absorption, leaking, or the diaper inside becoming moist and stuffy. Disposable diapers in such conditions are often thrown away with part of the SAP remaining unused. 

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