Distinguish separation from re-release
Separation is free water appearing in the pack; re-release is absorbed water being squeezed back out under load. They have different causes and different fixes, so identifying which one is occurring saves time.
Causes of separation
Excess capacity with insufficient gel strength, inadequate thickener, or hard water producing a weak network all encourage separation. Filling before the gel has fully formed is another frequent cause.
Causes of re-release
Compression from stacking, local saturation from uneven polymer distribution, or a film that lets liquid migrate back to the surface. Improve network strength and distribution uniformity to reduce it.
A check you can run
Measure released liquid under a standard weight and compare batches. If separation appears without any compression, the issue is formulation; if it appears only under load, look at gel strength and distribution.
About FLORPOLY: FLORPOLY supplies ice-pack grade super absorbent polymer in freeze-thaw resistant and food-contact grades, with 40 to 80 mesh granules and tailored uptake speed and gel strength. Batch test data, freeze-thaw cycling reports and OEM support are available. Contact FLORPOLY for a specification sheet, free sample or application advice.
Da maohua
Zhengzhou Flor New Materials Co., Ltd. specializes in SAP super‑absorbent polymer products. Serving personal hygiene, agriculture & horticulture, pet supplies and other industries, we leverage supply‑chain resources to provide particle‑size selection, performance matching and customized solutions based on clients’ practical requirements.
