4.8 kPa Breaks the Promise: Reading Absorbency Under Load First
Free swell of 400 g/g can fall to 26 g/g under 4.8 kPa. How AUL is measured, what your process pressure actually is, and how to test a grade before ordering.
The Swell Number on the COA: Five Things It Leaves Out
A 450 g/g swell number can be the worst field grade. The five COA figures that matter, how the tea-bag test flatters weak polymers, and a one-season trial.
The Powder That Holds 400 Times Its Weight and Still Makes a Watery Pack
A gel pack plant in Ningbo shipped 1,200 one-kilo packs to a seafood customer in June and got 38 back as complaints. The film was intact, the seals were clean, and every pack still weighed what it should. But each bag carried a film of free water sliding around inside, photographed on a white tray. …
