| 摘要 |
PROBLEM TO BE SOLVED: To provide an underpants type disposable diaper having an excellent dynamic fitting property on the belly side.SOLUTION: By varying at least one of a longitudinal arrangement interval, a diameter, an elongation rate at the time of fixing, and the number between a waist edge part elastic expansion/contraction member 17 and an abdominal region elastic expansion/contraction member 20, an underpants type disposable diaper satisfies the relation or F>F>F, when tensile force of a front waist edge part region fw when elastic-deformed in the width direction is set as F, tensile force of an ilium abutment region fi when elastic-deformed in the width direction is set as F, and tensile force of an abdominal region abutment region fd when elastic-deformed in the width direction is set as F. |
