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Patents

Absorbent Article with Leak-Proof Walls:

U.S. Patent No. 11,357,670

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By: Karen McIntyre

Editor, Nonwovens Industry

Hirotomo Mukai, Kagawa, Japan; and Takahito Nagai, Kagawa, Japan.
Assigned to Unicharm Corporation, Ehime, Japan.

Filed: 6/5/17
Issued: 6/14/22

An absorbent article comprising: an absorbent main body including an absorbent core and having a longitudinal direction, a width direction, and a thickness direction that intersect one another, the absorbent core including a low-basis-weight portion in a widthwise central portion, the low-basis-weight portion being a portion in which a basis weight of the absorbent core is smaller than the basis weight in a surrounding of the portion; a pair of leak-proof walls provided on respective widthwise side portions of the absorbent main body, each of the leak-proof walls including an elastic member that stretches and contracts in the longitudinal direction, each of the leak-proof walls being capable of standing on a skin side in the thickness direction, each of the leak-proof walls including a skin-side portion and a non-skin-side portion, the non-skin-side portion disposed on a non-skin side in the thickness direction with respect to the skin-side portion; and a joined part provided inside a distal end of each of the leak-proof walls and outside the low-basis-weight portion in the width direction, the joined part formed by joining at least partially a surface of the skin-side portion and a surface of the non-skin-side portion, the surfaces facing to each other, a part of the joined part and a part of the low-basis-weight portion at least overlapping in the longitudinal direction, wherein the absorbent core includes an upper-layer core and a lower-layer core disposed on the non-skin side in the thickness direction with respect to the upper-layer core, the low-basis-weight portion is provided in the lower-layer core, the low-basis-weight portion includes a side low-basis-weight portion provided in a widthwise side portion of the absorbent core, a part of the upper-layer core overlapping the side low-basis-weight portion in the longitudinal direction is disposed inside an outer widthwise end of the side low-basis-weight portion, a longitudinal back end portion of the joined part is located on a back side in the longitudinal direction with respect to the low-basis-weight portion, and the longitudinal back end portion is placed on the upper-layer core and the lower-layer core in the thickness direction.

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