Disposable underpants and method of continuously producing the same

Disposable underpants comprising:

• an outer sheet having an outermost nonwoven fabric, an inner nonwoven fabric and an inner absorbent member, said outer sheet including portions defining one waist-opening, a waist-opening edge along said waist-opening, a pair of leg-openings, and left and right sides of the disposable underpants, said left and right sides each being bonded, said outermost nonwoven fabric being turned onto the inner nonwoven fabric at the waist-opening edge forming a first turned portion,
• said inner absorbent member including a permeable top sheet, an impermeable back sheet, and an absorbent core accommodated between the top sheet and the back sheet,
• said absorbent core including:
• a tissue;
• an upper layer made of a mixture of pulp fibers and super absorbent polymer particles, said tissue being above said upper layer and said upper layer formed to have a substantially sandglass-shape having narrowed portions at left and right sides of a middle portion with respect to a longitudinal direction of the absorbent core in a plan view;
• an intermediate layer provided with a first nonwoven fabric;
• a lower layer having a rectangular shape in plan view and being made of a mixture of pulp fibers and super absorbent polymer particles and portions of said lower layer defining an outer periphery of said lower layer and said intermediate layer being adhered to said upper layer and lower layer by an adhesive, said upper layer being formed larger than said lower layer and said upper and lower layer being laid such that a center line of said upper layer with respect to a widthwise direction and a centerline of said lower layer with respect to a widthwise direction correspond with each other;
• and
• a second nonwoven fabric below said lower layer and adhered to said lower layer, said second nonwoven fabric having a portion projecting out from the outer periphery of said lower layer such that said portion of the second nonwoven fabric is turned up onto said lower layer and adhered while being placed to the first nonwoven fabric;
• a waist elastic member provided between the inner nonwoven fabric and the first turned portion;
• leg elastic members;
• and
• a fitting elastic member provided between the waist elastic member and the leg elastic members, said fitting elastic member comprising a plurality of thread-like elastic materials parallel to the waist elastic member, said fitting elastic member partly overlapping an absorbent core of the inner absorbent member thereby forming an overlapping portion, a portion of said fitting elastic member located in the overlapping portion being provided in a non-stretched state so as not to contract;
• wherein at least the leg elastic members and the fitting elastic member are provided between the outermost nonwoven fabric and inner nonwoven fabric of the outer sheet.

Disposable underpants comprising:

• an outer sheet having an outermost nonwoven fabric, an inner nonwoven fabric and an inner absorbent member, said outer sheet including portions defining one waist-opening, a waist-opening edge along said waist-opening, a pair of leg-openings, and left and right sides of the disposable underpants, said left and right sides each being bonded, said outermost nonwoven fabric being turned onto the inner nonwoven fabric at the waist-opening edge forming a first turned portion;
• said inner absorbent member including a permeable top sheet, an impermeable back sheet, and an absorbent core accommodated between the top sheet and the back sheet,
• said absorbent core including:
• an upper layer made of a mixture of pulp fibers and super absorbent polymer particles;
• an intermediate layer provided with a first nonwoven fabric;
• and
• a lower layer made of a mixture of pulp fibers and super absorbent polymer particles, said intermediate layer being adhered to the upper layer and lower layer by an adhesive;
• a waist elastic member provided between the inner nonwoven fabric and the first turned portion;
• leg elastic members, each of which is made of a plurality of thread-like elastic materials, said thread-like elastic materials being located at a front part of the disposable underpants and including left and right side portions extending along leg-opening edges of the front part of the disposable underpants and connecting portions connecting leading ends of the left and right side portions, thereby forming substantially U-shaped lines and said thread-like elastic materials defining at a rear part of the disposable underpants left and right side portions extending along leg-opening edges of the rear part of the disposable underpants and connecting portions connecting leading ends of the side portions, thereby forming substantially U-shaped lines, such that the connecting portions of the front and rear parts do not intersect with each other at a crotch of the disposable underpants;
• and
• a fitting elastic member provided between the waist elastic member and the leg elastic members, said fitting elastic member comprising a plurality of thread-like elastic materials parallel to the waist elastic member, said fitting elastic member being provided closer to the waist-opening edge than a longitudinal end of the absorbent core of the inner absorbent member such that the fitting elastic member and the absorbent core do not overlap;
• wherein at least the leg elastic members and the fitting elastic member are provided between the outermost nonwoven fabric and inner nonwoven fabric of the outer sheet.

Disposable underpants comprising:

• an outer sheet having an outermost nonwoven fabric, an inner nonwoven fabric and an inner absorbent member, said outer sheet including portions defining one waist-opening, a waist-opening edge along said waist-opening, a pair of leg-openings, and left and right sides of the disposable underpants, said left and right sides each being bonded, said outermost nonwoven fabric being turned onto the inner nonwoven fabric at the waist-opening edge forming a first turned portion;
• said inner absorbent member including a permeable top sheet, an impermeable back sheet, and an absorbent core accommodated between the top sheet and the back sheet,
• said absorbent core including:
• an upper layer made of a mixture of pulp fibers and super absorbent polymer particles,
• an intermediate layer provided with a first nonwoven fabric, and
• a lower layer made of a mixture of pulp fibers and super absorbent polymer particles, said intermediate layer being adhered to the upper layer and lower layer by an adhesive;
• a waist elastic member provided between the inner nonwoven fabric and the first turned portion;
• leg elastic members, each of which is made of a plurality of thread-like elastic materials, said thread-like elastic materials being located at a front part of the disposable underpants and including left and right side portions extending along leg-opening edges of the front part of the disposable underpants and connecting portions connecting leading ends of the left and right side portions, thereby forming substantially U-shaped lines and said thread-like elastic materials defining at a rear part of the disposable underpants left and right side portions extending along leg-opening edges of the rear part of the disposable underpants and connecting portions connecting leading ends of the side portions, thereby forming substantially U-shaped lines, such that the connecting portions of the front and rear parts do not intersect with each other at a crotch of the disposable underpants;
• and
• a fitting elastic member provided between the waist elastic member and the leg elastic members, said fitting elastic member comprising a plurality of thread-like elastic materials parallel to the waist elastic member, said fitting elastic member partly overlapping an absorbent core of the inner absorbent member thereby forming an overlapping portion, a portion of said fitting elastic member located in the overlapping portion being provided in a non-stretched state so as not to contract;
• wherein at least the leg elastic members and the fitting elastic member are provided between the outermost nonwoven fabric and inner nonwoven fabric of the outer sheet.