Superabsorbent polymers (SAP) (also called slush powder) are polymers that can absorb and retain extremely large amounts of a liquid relative to their own mass.
SAP may absorb 500 times its weight (from 30-60 times its own volume) and can become up to 99.9% liquid, but when put into a 0.9% saline solution, the absorbency drops to maybe 50 times its weight.
The largest use of SAP is found in personal disposable hygiene products, such as baby diapers, adult protective underwear and sanitary napkins. SAP is also used for blocking water penetration in underground power or communications cable, horticultural water retention agents, control of spill and waste aqueous fluid, artificial snow for motion picture and stage production. The first commercial use was in 1978 for use in feminine napkins in Japan and disposable bed liners for nursing home patients in the USA.
Appearance: White Powder
Absorption Capacity: De-ionized water 400
Absorption Capacity: 0.9% NaCl solution 60
Centrifuge Retention Capacity(CRC) g/g 32
Absorbing Speed (By vortex method) Seconds 60
Bulk Density: g/cm3 0.6
Moisture % : 5% Max
pH: 6 to 8