Absorbent product
In an absorbent product, an absorbent core includes an upper absorber including a super absorbent material fixedly attached between upper and lower absorber sheets. The upper absorber includes material existence regions that are arranged in the width direction and to which the super absorbent material is fixedly attached, and a material non-existence region in which the super absorbent material does not exist is arranged between each pair of adjacent material existence regions. In each material non-existence region, the upper and lower absorber sheets are entirely joined together. In at least one material non-existence region, the top sheet and the upper absorber sheet are partly joined together. The load applied when the nonwoven fabric of the top sheet is stretched 3% in the width direction is twice or more of the load applied when the nonwoven fabric of the upper absorber sheet is stretched 3% in the width direction.
1 . An absorbent product for receiving body waste from a wearer, the absorbent product comprising:
a liquid-pervious top sheet;
a water-repellent or liquid-impervious back sheet; and
an absorbent core disposed between said top sheet and said back sheet and extending in a longitudinal direction,
wherein said absorbent core includes:
an upper absorber including a super absorbent material fixedly attached between an upper absorber sheet and a lower absorber sheet; and
a lower absorber including a fiber assembly and disposed between said upper absorber and said back sheet,
said upper absorber includes a plurality of material existence regions that are arranged in a width direction with clearance therebetween and to which said super absorbent material is fixedly attached, and a plurality of material non-existence regions in which said super absorbent material does not exist, each material non-existence region being arranged between a respective pair of said plurality of material existence regions that are adjacent to each other in said width direction,
in each material non-existence region, said upper absorber sheet and said lower absorber sheet are entirely joined together using heat fusion bonding to form a first joined portion,
between said top sheet and said upper absorber sheet, patterns each obtained by applying an adhesive in said longitudinal direction are arranged in said width direction to partly join said top sheet and said upper absorber sheet, such that in at least one first material non-existence region of the plurality of material non-existence regions, said top sheet and said upper absorber sheet are partly joined together to form a second joined portion,
a load applied when nonwoven fabric of said top sheet is stretched 3% in said width direction is twice or more of a load applied when nonwoven fabric of said upper absorber sheet is stretched 3% in said width direction, and
in the at least one first material non-existence region, said top sheet is configured to, when said super absorbent material swells, delaminate from said upper absorber sheet to form a delamination space between said top sheet and said upper absorber sheet in the at least one first material non-existence region while said first joined portion is maintained throughout said absorbent core in the at least one first material non-existence region.
2 . The absorbent product according to claim 1 , wherein
the nonwoven fabric of said top sheet has higher tensile strength in said width direction than the nonwoven fabric of said upper absorber sheet.
3 . The absorbent product according to claim 1 , wherein
fineness of the nonwoven fabric of said top sheet is 1.1 times or more of fineness of the nonwoven fabric of said upper absorber sheet.
4 . The absorbent product according to claim 1 , wherein
a basis weight of the nonwoven fabric of said top sheet is 1.1 times or more of a basis weight of the nonwoven fabric of said upper absorber sheet.
5 . The absorbent product according to claim 1 , wherein
in the at least one first material non-existence region including said second joined portion, a joint region in which said top sheet and said upper absorber sheet are joined together has an area ratio higher than or equal to 1% and lower than or equal to 50%.
6 . The absorbent product according to claim 1 , wherein
said second joined portion has lower peel strength than said first joined portion.
7 . The absorbent product according to claim 1 , wherein in at least one second material non-existence region of the plurality of material non-existence regions, said top sheet and said upper absorber sheet are not joined together.