Absorbent article with free edge portions

Details Absorbent article with free edge portions Absorbent article with free edge portions

1998-04-21

2001-12-04

Ruhl, Dennis (Department: 3761)

Surgery

Means and methods for collecting body fluids or waste material

Absorbent pad for external or internal application and...

C604S385240, C604S387000, C604S385010

Reexamination Certificate

active

06326525

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to an absorbent article such as a sanitary napkin, an incontinent pad, or the like, which has a nice fitness and a high leakage-preventive ability.
As an absorbent article, such as a sanitary napkin, an incontinent pad, or the like, there has heretofore been widely used a substantially vertically-long absorbent article including a liquid-retentive absorbent layer and a liquid-impermeable leakage-preventive layer.
Such an absorbent article is required to prevent leakage, particularly to effectively prevent leakage from the side portions, and many proposals have been made.
For example, in Japanese Utility Model Unexamined Publication (KOKAI) No. 1-2592, there is proposed a sanitary napkin, in which elastic members are arranged on both left and right side edge portions of an absorbent article so that a round-shaped configuration is exhibited on the body side of its user in a natural state.
In such a suggested sanitary napkin, however, the napkin, when in wear, tends to move together with the shorts in obedience to the motion of the wearer, and therefore, fitness is degraded and leakage occurs when slipped.
In Japanese Patent Unexamined Publication (KOKAI) No. 8-503638, there is proposed an absorbent article, in which cubic gathers comprising a topsheet, a backsheet, and an elastic member are provided on both left and right guide of an absorbent member such that the cubic gathers are erected.
Such a proposed sanitary napkin, however, cannot satisfy the required level of leakage-preventive ability and the leakage-preventive ability from the sides is degraded.
SUMMARY OF THE INVENTION
It is, therefore, an object of the present invention to provide an absorbent article, which has a nice fitness and a high leakage-preventive ability, and which is particularly capable of preventing leakage from the sides effectively.
As a result of search and development with a view to solving the above problems, the present inventors have found that the above object can be achieved by providing an absorbent article comprising a fixed portion forming an absorbent layer fixed to a leakage-preventive layer, and free edge portions each located on both left and right sides of the fixed portion and each having a free end.
The present invention provides an absorbent article having a substantially elongate configuration, comprising a liquid-impermeable leakage-preventive layer, and a liquid-retentive absorbent layer disposed above the leakage-preventive layer, wherein the absorbent layer comprises a liquid-retentive absorbent member and a liquid-permeable topsheet, and is formed by a fixed portion and one pair of left and right free edge portions, the fixed portion being fixed to the leakage-preventive layer, the free edge portions being located on opposite left and right sides in the longitudinal direction of the fixed portion and each having a free end, the absorbent member being present in both of the fixed portion and the pair of left and right free edge portions.
The absorbent article according to the present invention has a nice fitness and a high leakage-preventive ability, and is particularly capable of effectively preventing leakage from the sides.


REFERENCES:
patent: H1614 (1996-11-01), Mayer et al.
patent: 4029101 (1977-06-01), Chesky et al.
patent: 5133704 (1992-07-01), Wheeler
patent: 5542941 (1996-08-01), Morita
patent: 5735838 (1998-04-01), Ronnberg et al.
patent: 6114597 (2000-09-01), Romare
patent: 0604764 (1994-07-01), None
patent: 64/12522 (1989-01-01), None
patent: 8503638 (1996-04-01), None
patent: 294501 (1997-01-01), None
patent: WO 9412135 (1994-06-01), None
patent: WO 9640029 (1996-12-01), None
patent: WO 9709016 (1997-03-01), None
patent: WO 9817217 (1998-04-01), None

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