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1. (WO2017039615) IMPROVING THE PURITY OF MATERIALS RECYCLED FROM DISPOSABLE ABSORBENT ARTICLES

Pub. No.:    WO/2017/039615    International Application No.:    PCT/US2015/047736
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Sep 01 01:59:59 CEST 2015
IPC: B29B 17/02
B29B 17/04
Applicants: KIMBERLY-CLARK WORLDWIDE, INC.
Inventors: LEE, HoSun
KIM, KyungShin
KIM, HyungByum
Title: IMPROVING THE PURITY OF MATERIALS RECYCLED FROM DISPOSABLE ABSORBENT ARTICLES
Abstract:
Improving the recovery from recycling a disposable absorbent article including superabsorbent polymer includes separating the article into a mixed polymeric material/cellulosic fiber stream and a superabsorbent polymer/fibers stream; and processing the mixed polymeric material/cellulosic fiber stream using an enzyme to release the cellulosic fibers from the polymeric materials. The method can also include shredding the disposable absorbent article; re-pulping the shredded disposable absorbent article; and dehydrating the superabsorbent polymer, wherein dehydrating includes belching fluid from swollen superabsorbent polymers (SAPs) by immersing swollen SAP in a gel state into a composition for removing moisture, wherein seawater and 0.5 to 3% by weight of calcium chloride based on the weight of seawater are mixed for 10 minutes to 4 hours.