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Gel permeation chromatography (GPC) profiles of (a) the meltblown layer before and after hydrolytic degradation in basic condition for different periods; (b) the basic solution residues (BS) associated with the meltblown layer after different degradation periods; (c) the biodegradation soaking mediums of the spunbond (Bio—S) and meltblown (Bio-M) layers after 4 weeks.
