Absorbent article

Patent metadata

Field	Value
Publication number	US-2019110934-A1
Application number	US-201716088879-A
Country	US
Kind code	A1
Filing date	Feb 23, 2017
Priority date	Mar 30, 2016
Publication date	Apr 18, 2019
Grant date	—

Abstract

An absorbent article includes an absorber including cells, each of which is surrounded by bonded portions of a front surface side sheet and a back surface side sheet and in each of which the front surface side sheet and the back surface side seat are not bonded, and including superabsorbent polymer particles contained in each of the cells. The bonded portions are arranged in dotted line shapes according to a pattern in which same-sized octagonal portions having all interior angles of 135°, and having two pairs of opposite sides whose facing directions are mutually orthogonal are equal in length, and diamond-shaped portions each having equal length of all sides and being formed in portions among the octagonal portions, are arranged without any space in the front-back direction (LD) or the width direction (WD).

First claim

1 . An absorbent article comprising an absorber including:
a front surface side sheet; a back surface side sheet disposed on the back surface side of the front surface side sheet; a plurality of cells each of which is surrounded by bonded portions of the front surface side sheet and the back surface side sheet and inside each of which the front surface side sheet and the back surface side sheet are not bonded; and particulate materials which include superabsorbent polymer particles and which are contained in each of the cells,
wherein the same-sized octagons in which all interior angles are 135°, and the lengths of two pairs of opposite sides whose facing directions are mutually orthogonal are equal are arranged without space in the front-back direction and the width direction,
along the pattern in which a portion between the octagonal portions forms a diamond shape whose length of all sides are equal,
the bonded portions are provided in a continuous line shape or a dotted line shape,
as the cells, octagonal cells surrounded by the octagonal portions of the bonded portions and diamond-shaped cells surrounded by the diamond-shaped portions of the bonded portions are included, and the bonded portions positioned on at least continuous two sides in each of the octagonal cells are weak bonded portions which can be peeled off due to the swelling force of the superabsorbent polymer particles in the cells adjacent to the bonded portions.

2 . The absorbent article according to claim 1 ,
wherein the diamond-shaped cell does not contain a superabsorbent polymer particle or contains a smaller amount of the superabsorbent polymer particles per unit area than the orthogonal cells.

3 . The absorbent article according to claim 1 ,
wherein, in the bonded portions provided in the octagonal patterns, first bonded portions positioned on the sides along the front-back direction and the width direction have lower bonding strength than second bonded portions positioned on the sides along the oblique direction, and the first bonded portions are peeled off more preferentially than the second bonded portions by the swelling force of the superabsorbent polymer particles.

4 . The absorbent article according to claim 1 ,
wherein, in the bonded portions provided in the octagonal patterns, first bonded portions positioned on the sides along the front-back direction and the width direction have higher bonding strength than second bonded portions positioned on the sides along the oblique direction, and the second bonded portions are peeled off more preferentially than the first bonded portion by the swelling force of the superabsorbent polymer particles.

5 . The absorbent article according to claim 1 , comprising
a plurality of maximum enlargement sections in each of which a portion where three or more octagonal cells and four or more diamond-shaped cells are arranged respectively without any space in the front-back direction and the width direction is surrounded by strong bonded portions which are not peeled off against the swelling force of the superabsorbent polymer particles in the adjacent cells, wherein the bonded portions positioned inside the strong bonded portions in the maximum enlargement sections, are the weak bonded portions.

6 . The absorbent article according to claim 5 ,
wherein longitudinal-strong-bond lines on which the strong bonded portions are continuously or intermittently provided in the front-back direction along the maximum length of the absorber, are provided in the center portion and the both side portions in the width direction of the absorber, respectively a plurality of lateral-strong-bond lines on which the strong bonded portions are continuously or intermittently provided in the width direction or the oblique direction from the longitudinal-strong-bond line in the center portion to each of the longitudinal-strong-bond lines in the both side portions is provided at intervals in the front-back direction, and sections, which are surrounded by the longitudinal-strong-bond lines and the lateral-strong-bond lines so as to be partitioned, are the maximum enlargement sections.

7 . The absorbent article according to claim 6 ,
wherein the lateral-strong-bond lines are formed in a zigzag shape extending in the front-back direction while repeatedly bending left and right between the longitudinal-strong-bond line in the center portion and each of the longitudinal-strong-bond lines in the both side portions.

8 . The absorbent article according to claim 5 ,
wherein the bonded portions are portions where the front surface side sheet and the back surface side sheet are welded, the weak bonded portions and the strong bonded portions are provided in dotted line patterns, the line width of the weak bonded portions is narrower than the line width of the strong bonded portions, and the point interval of the weak bonded portions is wider than the point interval of the strong bonded portions.

9 . The absorbent article according to claim 1 ,
wherein at least one low-swelling-cell row in which all of the bonded portions of the both side edges thereof aligned linearly in the front-back direction are the strong bonded portions is provided in the center in the width direction of the absorber, and the both sides in the width direction of the low-swelling-cell row, have a higher swellable height than the low-swelling-cell row.

10 . The absorbent article according to claim 1 ,
wherein the bonded portion is not provided at positions where the sides on which the weak bonded portions are positioned intersect with each other in the cells.

11 . The absorbent article according to claim 1 ,
wherein at least cells provided at positions through which the front and back ends of the absorber pass and cells in the both side portions in an intermediate portion of the front-back direction of the absorber are empty cells which do not contain a superabsorbent polymer particle or which contains a smaller amount of the superabsorbent polymer particles per unit area than other cells.

12 . The absorbent article according to claim 2 ,
wherein, in the bonded portions provided in the octagonal patterns, first bonded portions positioned on the sides along the front-back direction and the width direction have lower bonding strength than second bonded portions positioned on the sides along the oblique direction, and the first bonded portions are peeled off more preferentially than the second bonded portions by the swelling force of the superabsorbent polymer particles.

13 . The absorbent article according to claim 2 ,
wherein, in the bonded portions provided in the octagonal patterns, first bonded portions positioned on the sides along the front-back direction and the width direction have higher bonding strength than second bonded portions positioned on the sides along the oblique direction, and the second bonded portions are peeled off more preferentially than the first bonded portion by the swelling force of the superabsorbent polymer particles.

14 . The absorbent article according to claim 2 , comprising
a plurality of maximum enlargement sections in each of which a portion where three or more octagonal cells and four or more diamond-shaped cells are arranged respectively without any space in the front-back direction and the width direction is surrounded by strong bonded portions which are not peeled off against the swelling force of the superabsorbent polymer particles in the adjacent cells, wherein the bonded portions positioned inside the strong bonded portions in the maximum enlargement sections, are the weak bonded portions.

Assignees

• Daio Seishi Kk

Inventors

• Manabe Sadanao
• Ochi Ryoichi
• Mori Yosuke
• Ono Yohei

Classifications

• A61F13/15203 Primary

  Properties of the article, e.g. stiffness or absorbency (chemical aspects A61L15/00) · CPC title

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• A61F2013/15422

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• A61F2013/530299

  being hydrophilic fibres · CPC title

• A61F2013/530051

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