Patent ID: 7156829

Claim:
A disposable diaper, comprising: a front waist region; a rear waist region; a crotch region extending between these said waist regions; a liquid-pervious topsheet facing the wearer's skin; a liquid-impervious backsheet facing away from the wearer's skin; a liquid-absorbent core interposed between said top- and backsheets; said diaper being contoured by longitudinally opposite end portions extending in a transverse direction outside longitudinally opposite ends of said core and transversely opposite side edge portions extending in a longitudinal direction outside transversely opposite side edges of said core wherein said front and rear waist regions are connected to each other by means of fastening means when the diaper is put on; and of said front and rear waist regions, at least said rear waist region including an elastically stretchable waist area extending in the transverse direction along its end and elastically stretchable wing areas extending outward from its transversely opposite side edge portions in the transverse direction, said transversely opposite side edge portions of said rear waist region lying between said stretchable waist area and said stretchable wing areas and said stretchable wing areas having a transverse stretch stress higher than that of said stretchable waist area; wherein second elastic members contractibly attached to the transversely opposite side edge portions of said rear waist region make said transversely opposite side edge portion stretchable in the transverse direction and the transverse stretch stress of said elastically stretchable wing areas is lower than the transverse stretch stress of the transversely opposite side edge portions of said rear waist region.