Boxer-shorts-type disposable diaper and method for producing same

A boxer-shorts-type disposable diaper comprising:

• an outer member having a ventral outer member, a dorsal outer member, and a crotch outer member extending between the ventral outer member and the dorsal outer member and to be placed through a crotch of a wearer, and
• an inner member containing an absorber body and joined to an interior face of at least the crotch outer member of the outer member,
• wherein opposed side edges of the ventral outer member and opposed side edges of the dorsal outer member are joined to form a waist opening and a pair of leg openings,
• wherein the crotch outer member has a pair of inner-thigh-contacting areas extending beyond the absorber body one in one width direction and other in other width direction, and areas extending along edges of the leg openings including the inner-thigh-contacting areas form a pair of leg cylinders each configured to be positioned adjacent to a groin side of a thigh,
• wherein the ventral outer member is joined in a middle of a width direction in a crotch-side end to the crotch outer member to form a ventral seam,
• wherein the dorsal outer member is joined in a middle of a width direction in a crotch-side end to the crotch outer member to form a dorsal seam,
• wherein the areas extending along the edges of the leg openings in the ventral outer member and the areas extending along the edges of the leg openings in the dorsal outer member are stretchable in the width direction,
• wherein the areas extending along the edges of the leg openings in the crotch outer member are stretchable in a front-back direction,
• wherein the ventral seam has a left oblique portion extending from left side ventrally with increasing proximity to a middle of the width direction, a right oblique portion extending from right side ventrally with increasing proximity to a middle of the width direction, and a connecting portion connecting the left oblique portion and the right oblique portion, and a ventral-most point on the connecting portion of the ventral seam is a ventral connection point,
• wherein the dorsal seam has a left oblique portion extending from left side dorsally with increasing proximity to a middle of the width direction, a right oblique portion extending from right side dorsally with increasing proximity to a middle of the width direction, and a connecting portion connecting the left oblique portion and the right oblique portion, and a dorsal-most point on the connecting portion of the dorsal seam is a dorsal connection point, and
• wherein a distance in the front-back direction between a point on the dorsal seam closest to the crotch and the dorsal connection point is shorter than a distance in the front-back direction between a point on the ventral seam closest to the crotch and the ventral connection point.