Science of Absorbency

Shop around and you’ll see wildly different capacity claims. BetterDry Day lists about 730 mL (25 oz). NorthShore MegaMax is advertised at up to 1,450 mL (49 oz). Crinklz claims around 40 oz. Meanwhile TREST says its Elite Briefs hold roughly 9,500 mL and DryBritches rates Posy at 9,000 mL. How can the numbers be…

Every modern disposable diaper depends on a remarkable material: super-absorbent polymer, usually sodium polyacrylate. It looks like coarse white sugar, but a small amount can soak up many times its own weight in liquid. How it works SAP is a long chain of molecules that are lightly cross-linked into a three-dimensional net. The chains carry…