Patent ID: 6673985
Filing Date: 2004-01-06
Classification: A61F

Abstract:
A sanitary napkin having a longitudinal rear portion to be applied to the buttocks of a wearer, comprising:a longitudinally extending main absorbent region in which a longitudinally extending main absorbent core is disposed between a liquid-impermeable back sheet and a liquid-permeable surface sheet; side regions positioned on both sides of said main absorbent region; and boundary regions between said main absorbent region and said side regions, each boundary region being provided with a longitudinally extending leakage-preventing side wall, wherein in said rear portion, at least a portion of said main absorbent region is formed into a stiff portion having a stiffness higher than that of the remaining portion of said main absorbent region, and in said rear portion, said side regions are protruded laterally to form rear flaps, in each of which an auxiliary absorbent core is disposed between said back sheet and a sheet positioned on a surface side opposite to said back sheet with respect to said auxiliary absorbent core, wherein in said rear portion, a portion of said main absorbent region having said stiff portion therein, said boundary region and said rear flap have different longitudinal stiffnesses according to the following relationship: said portion of said main absorbent region having said stiff portion therein>said boundary region>said rear flap.