Absorptive article

Patent metadata

Field	Value
Publication number	US-9314383-B2
Application number	US-201314389274-A
Country	US
Kind code	B2
Filing date	Mar 26, 2013
Priority date	Mar 30, 2012
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

The purpose of this disclosure is to provide an absorptive article which can deform while following the movement of the wearer's legs and which can restore to the original shape. The absorptive article of this disclosure has the following configuration. The absorptive article ( 1 ) includes a liquid permeable top sheet ( 4 ), a liquid impermeable back sheet, and an absorption body ( 7 ). The absorptive article ( 1 ) is characterized in that the absorptive article ( 1 ) has, in the region thereof which is in contact with the excretory opening, a medium-high section ( 2 ) protruding in the thickness direction of the absorptive article ( 1 ) and including a cushion section, and in that the absorption body ( 7 ) has one or more compressed sections ( 3 ) which form a folding axis about which the absorptive article ( 1 ) is folded in the width direction thereof so that the skin contact surface of the top sheet ( 4 ) protrudes.

First claim

The invention claimed is:

1. An absorbent article comprising:
a liquid-permeable top sheet,
a liquid-impermeable back sheet, and
an absorbent body between the liquid-permeable top sheet and liquid-impermeable back sheet,
wherein
the absorbent article has in an excretory opening contact region a domed section that protrudes in a thickness direction of the absorbent article,
the domed section includes (i) a part of the top sheet and (ii) a cushion section disposed between the top sheet and the absorbent body,
the cushion section has a maximum thickness of 3 to 30 mm,
the absorbent body has one or more embossed sections formed by embossing the absorbent body either continuously or intermittently in a lengthwise direction of the absorbent article,
the one or more embossed sections form a folding axis for folding the absorbent article in a widthwise direction of the absorbent article so that a skin contact surface of the top sheet protrudes outward,
the absorbent body has a furrow along the folding axis on a back sheet side of the absorbent body, and the back sheet is indented along the furrow, and
the cushion section has a compressive force of 0.1-3.6N in the widthwise direction of the absorbent article.

2. The absorbent article according to claim 1 , wherein the cushion section has an average basis weight of 50 to 800 g/m 2 .

3. The absorbent article according to claim 1 , wherein the cushion section comprises an air-through nonwoven fabric in which the intersections between fibers are heat-fused.

4. The absorbent article according to claim 1 , wherein the one or more embossed sections forming the folding axisare arranged in a region overlapping the cushion section in the thickness direction.

5. The absorbent article according to claim 1 , wherein
the domed section has a center section and an outer peripheral section surrounding the center section, and
a density of the cushion section at the outer peripheral section is higher than a density of the cushion section at the center section.

6. The absorbent article according to claim 1 , wherein
the cushion section retains at least 50% of its maximum thickness after absorption of 2 g of horse EDTA blood, as compared to before horse EDTA blood absorption.

7. The absorbent article according to claim 1 , wherein the absorbent article has a curved structure in which the domed section curves inward.

8. The absorbent article according to claim 1 , wherein the top sheet has, on the skin contact surface, a plurality of ridges and a plurality of furrows, extending in the lengthwise direction of the absorbent article.

9. The absorbent article according to claim 1 , wherein
the domed section further comprises a blood modifying agent with an IOB of 0.00-0.60, a melting point of 45° C. or less and a water solubility of 0.00-0.05 g in 100 g of water at 25° C.

10. The absorbent article according to claim 9 , wherein the blood modifying agent is selected from the group consisting of following items (i)-(iii), and any combination thereof:
(i) a hydrocarbon;
(ii) a compound having (ii-1) a hydrocarbon moiety, and (ii-2) one or more, same or different groups selected from the group consisting of carbonyl group (—CO—) and oxy group (—O—) inserted between a C—C single bond of the hydrocarbon moiety; and
(iii) a compound having (iii-1) a hydrocarbon moiety, (iii-2) one or more, same or different groups selected from the group consisting of carbonyl group (—CO—) and oxy group (—O—) inserted between a C—C single bond of the hydrocarbon moiety, and (iii-3) one or more, same or different groups selected from the group consisting of carboxyl group (—COOH) and hydroxyl group (—OH) substituting for a hydrogen of the hydrocarbon moiety;
with the proviso that when 2 or more oxy groups are inserted in the compound of (ii) or (iii), the oxy groups are not adjacent.

11. The absorbent article according to claim 9 , wherein the blood modifying agent is selected from the group consisting of following items (i′)-(iii′), and any combination thereof:
(i′) a hydrocarbon;
(ii′) a compound having (ii′-1) a hydrocarbon moiety, and (ii′-2) one or more, same or different bonds selected from the group consisting of carbonyl bond (—CO—), ester bond (—COO—), carbonate bond (—OCOO—), and ether bond (—O—) inserted between a C—C single bond of the hydrocarbon moiety; and
(iii′) a compound having (iii′-1) a hydrocarbon moiety, (iii′-2) one or more, same or different bonds selected from the group consisting of carbonyl bond (—CO—), ester bond (—COO—), carbonate bond (—OCOO—), and ether bond (—O—) inserted between a C—C single bond of the hydrocarbon moiety, and (iii′-3) one or more, same or different groups selected from the group consisting of carboxyl group (—COOH) and hydroxyl group (—OH) substituting for a hydrogen on the hydrocarbon moiety;
with the proviso that when 2 or more same or different bonds are inserted in a compound of (ii′) or (iii′), the bonds are not adjacent.

12. The absorbent article according to claim 9 , wherein the blood modifying agent is selected from the group consisting of following items (A)-(F), and any combination thereof:
(A) an ester of (A1) a compound having a chain hydrocarbon moiety and 2-4 hydroxyl groups substituting for hydrogens on the chain hydrocarbon moiety, and (A2) a compound having a chain hydrocarbon moiety and 1 carboxyl group substituting for a hydrogen on the chain hydrocarbon moiety;
(B) an ether of (B1) a compound having a chain hydrocarbon moiety and 2-4 hydroxyl groups substituting for hydrogens on the chain hydrocarbon moiety, and (B2) a compound having a chain hydrocarbon moiety and 1 hydroxyl group substituting for a hydrogen on the chain hydrocarbon moiety;
(C) an ester of (C1) a carboxylic acid, hydroxy acid, alkoxy acid or oxoacid comprising a chain hydrocarbon moiety and 2-4 carboxyl groups substituting for hydrogens on the chain hydrocarbon moiety, and (C2) a compound having a chain hydrocarbon moiety and 1 hydroxyl group substituting for a hydrogen on the chain hydrocarbon moiety;
(D) a compound having a chain hydrocarbon moiety and one bond selected from the group consisting of ether bonds (—O—), carbonyl bonds (—CO—), ester bonds (—COO—) and carbonate bonds (—OCOO—) inserted between a C—C single bond of the chain hydrocarbon moiety;
(E) a polyoxy C 2 -C 6 alkylene glycol, or its ester or ether; and
(F) a chain hydrocarbon.

13. The absorbent article according to claim 9 , wherein the blood modifying agent is selected from the group consisting of (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, (a 2 ) an ester of a chain hydrocarbon triol and at least one fatty acid, (a 3 ) an ester of a chain hydrocarbon diol and at least one fatty acid, (b 1 ) an ether of a chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol, (b 2 ) an ether of a chain hydrocarbon triol and at least one aliphatic monohydric alcohol, (b 3 ) an ether of a chain hydrocarbon diol and at least one aliphatic monohydric alcohol, (c 1 ) an ester of a chain hydrocarbon tetracarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 4 carboxyl groups, and at least one aliphatic monohydric alcohol, (c 2 ) an ester of a chain hydrocarbon tricarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 3 carboxyl groups, and at least one aliphatic monohydric alcohol, (c 3 ) an ester of a chain hydrocarbon dicarboxylic acid, hydroxy acid, alkoxy acid or oxoacid with 2 carboxyl groups, and at least one aliphatic monohydric alcohol, (d 1 ) an ether of an aliphatic monohydric alcohol and an aliphatic monohydric alcohol, (d 2 ) a dialkyl ketone, (d 3 ) an ester of a fatty acid

Assignees

• Unicharm Corp

Inventors

• Noda Yuki
• Tamura Tatsuya
• Hashino Akira

Classifications

• A61F13/534

  having an inhomogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence) · CPC title

• A61F13/51108

  the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction · CPC title

• A61F13/536

  having discontinuous areas of compression · CPC title

• A61F2013/15284

  characterized by quantifiable properties · CPC title

• A61F2013/15406

  Basis weight · CPC title