... as water,urine , blood , ect,it is different from normal fiber when absorbing , rather than through physical absorption , it absorb through ... chemical theory, then swell itself , and keep fluid in fiber, hard to press out. so it has strong retainess. ... ISO9001 ISO13485 CE and FDA Quality System Certificationsuper absorbent non-woven fabric SAP,non-woven fabric,super absorbent non-woven fabric