Absorbent article

Patent metadata

Field	Value
Publication number	US-9029626-B2
Application number	US-201013263737-A
Country	US
Kind code	B2
Filing date	Apr 7, 2010
Priority date	Apr 10, 2009
Publication date	May 12, 2015
Grant date	May 12, 2015

Abstract

An absorbent article includes a first curved portion and a second curved portion formed on the surface of a topsheet along a longitudinal direction of the absorbent article. The first curved portion is arranged in one pair to be symmetrical to a centerline of the absorbent article in a region in which the contact region is included, the region being an inside region more than each side part in a widthwise direction of the absorbent article, and is formed along a longitudinal direction of the absorbent article. The second curved portion is arranged in one pair in a region in which the contact region is included, the region being an inside region in the widthwise direction of the absorbent article more than the first curved portion, and is formed along the longitudinal direction of the absorbent article. The first curved portion and the second curved portion has a convex shape outward in the widthwise direction of the absorbent article, in the region in which the contact region is included.

First claim

The invention claimed is:

1. An absorbent article, comprising:
a topsheet having a contact surface configured to come into contact with a skin of a wearer;
a liquid-impermeable backsheet;
an absorber arranged between the topsheet and the backsheet and including absorbing material; and
a pair of leakage prevention units arranged at positions corresponding to both side parts of the absorber in a planar view of the absorbent article,
wherein
the absorbent article further includes a pair of first curved portions and a pair of second curved portions,
the first curved portions and second curved portions are thinner than a thickness of the absorbent article in a contact region configured to come into contact with an excretion part of the wearer,
the first curved portion are symmetrical to each other about a centerline of the absorbent article, are arranged between the side parts of the absorber in a widthwise direction of the absorbent article, and extend along a longitudinal direction of the absorbent article,
the second curved portions are arranged between the first curved portions in the widthwise direction of the absorbent article, and extend along the longitudinal direction of the absorbent article,
the contact region is arranged between the second curved portions,
each of the first curved portions and the second curved portions has a convex shape outward in the widthwise direction of the absorbent article,
the first curved portions and the second curved portions are compressed,
at least each of the first curved portions includes
a high compression region;
a low compression region having a density of the absorbing material lower than that in the high compression region, wherein the absorbing material on opposite sides of the first curved portion are connected with each other by the low compression region;
a middle wide portion in which an interval between the first curved portions is the widest in the widthwise direction of the absorbent article;
a forward narrow portion in which the interval between the first curved portions in the widthwise direction is narrower than that in the middle wide portion, the forward narrow portion being forward of the middle wide portion in the longitudinal direction;
a rearward narrow portion in which the interval between the first curved portions in the widthwise direction is narrower than that in the middle wide portion, the rearward narrow portion being rearward of the middle wide portion in the longitudinal direction;
a forward wide portion in which the interval between the first curved portions in the widthwise direction is wider than that in the forward narrow portion, the forward wide portion being forward of the forward narrow portion in the longitudinal direction; and
a rearward wide portion in which the interval between the first curved portions in the widthwise direction is wider than that in the rearward narrow portion, the rearward wide portion being rearward of the rearward narrow portion in the longitudinal direction,

the absorbent article further comprises
a main transversely crossing curved portion extending in the widthwise direction and arranged between the forward wide portions or between the rearward wide portions of the first curved portions, and
at least one subsidiary transversely crossing curved portion extending in the widthwise direction and arranged between the middle wide portions and the main transversely crossing curved portion,

the pair of first curved portions is configured to cross a virtual line which is parallel to the widthwise direction and connects end parts of joint units where the pair of the leakage prevention units is bonded to the topsheet,
the main transversely crossing curved portion or the subsidiary transversely crossing curved portion is configured to cross the virtual line, and
a width of a bottom part of each of the first curved portions is within a range of 0.5 mm to 5 mm.

2. The absorbent article according to claim 1 , wherein a basis weight of the absorbing material that exists at a position corresponding to the contact region is greater than a basis weight of the absorbing material that exists between the first curved portions and the second curved portions.

Assignees

• Nishitani Kazuya
• Hayashi Toshihisa
• Sagisaka Minako
• Unicharm Corp

Inventors

• Nishitani Kazuya
• Hayashi Toshihisa
• Sagisaka Minako

Classifications

• A61F13/47218

  with a raised crotch region, e.g. hump · CPC title

• A61F13/4704 Primary

  having preferential bending zones, e.g. fold lines or grooves · CPC title

• A61F13/53

  characterised by the absorbing medium (A61F13/20 takes precedence) · CPC title

• A61F13/514

  Backsheet, i.e. the impermeable cover or layer furthest from the skin {(A61F13/15211, A61F13/15252 take precedence)} · CPC title

• A61F13/511 Primary

  Topsheet, i.e. the permeable cover or layer facing the skin · CPC title