Thin sanitary napkin capable of controlled deformation when in use
First Claim
1. A sanitary napkin adapted to be worn in a crotch portion of an undergarment, said sanitary napkin comprising a main body with a longitudinal axis and two opposite longitudinal side areas, said main body comprising:
- a) a fluid-pervious cover layer;
b) an absorbent system under said cover layer, said absorbent system having a central width of at least 60 mm;
c) a liquid-impervious barrier layer under said absorbent system;
d) said main body being characterised by a thickness less than about 4 mm;
e) said main body being characterised by a flexural resistance of not less than about 400 g;
f) said main body further comprises a plurality of preferential bending lines crossing one another and defining an array of crossing points;
wherein at least one of said preferential bending lines extending obliquely in relation to said longitudinal axis on said main body, said at least one of said preferential bending lines extending from one longitudinal side area of the main body to an opposite longitudinal side area, crossing the longitudinal axis of the main body;
g) wherein said array of crossing points form at least one preferential bending zone allowing said sanitary napkin to fold at said preferential bending zone in response to lateral compression applied to said napkin and permitting said napkin to acquire a three-dimensional deformation profile.
4 Assignments
0 Petitions
Accused Products
Abstract
The present sanitary napkin is thin (less than 4 mm in thickness), highly absorbent and has a flexural resistance which provides controlled deformation when in use, namely the assumption of a “W” pattern (good for absorption performance) or a “M” pattern (which enhances comfort). This controlled deformation provides a good comfort potential and simultaneously reduces the likelihood of bunching due to compression forces exerted laterally against the napkin by the thighs of the wearer. The sanitary napkin is characterized by a flexural resistance of not less than about 400 g. The sanitary napkin has a cover layer, a barrier layer and an absorbent system having at least one preferential bending zone which allows the napkin to adopt a certain three-dimensional deformation profile in response to lateral compression.
28 Citations
17 Claims
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1. A sanitary napkin adapted to be worn in a crotch portion of an undergarment, said sanitary napkin comprising a main body with a longitudinal axis and two opposite longitudinal side areas, said main body comprising:
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a) a fluid-pervious cover layer;
b) an absorbent system under said cover layer, said absorbent system having a central width of at least 60 mm;
c) a liquid-impervious barrier layer under said absorbent system;
d) said main body being characterised by a thickness less than about 4 mm;
e) said main body being characterised by a flexural resistance of not less than about 400 g;
f) said main body further comprises a plurality of preferential bending lines crossing one another and defining an array of crossing points;
wherein at least one of said preferential bending lines extending obliquely in relation to said longitudinal axis on said main body, said at least one of said preferential bending lines extending from one longitudinal side area of the main body to an opposite longitudinal side area, crossing the longitudinal axis of the main body;
g) wherein said array of crossing points form at least one preferential bending zone allowing said sanitary napkin to fold at said preferential bending zone in response to lateral compression applied to said napkin and permitting said napkin to acquire a three-dimensional deformation profile. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
two preferential bending zones extending along said longitudinal axis and being adjacent the side edges of said main body on said top surface of said absorbent system; and
a preferential bending zone on the bottom surface of said absorbent system extending along said longitudinal axis, between the two preferential bending zones adjacent the side edges of said main body.
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14. A sanitary napkin as defined in claim 1, wherein said main body includes a pair of longitudinally extending side edges, said absorbent system comprises a top surface and a bottom surface and includes:
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two preferential bending zones extending along said longitudinal axis and being adjacent the side edges of said main body on said bottom surface of said absorbent system; and
a preferential bending zone on the top surface of said absorbent system extending along said longitudinal axis, between the two preferential bending zones adjacent the side edges of said main body.
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15. A sanitary napkin as defined in claim 1, wherein said absorbent system includes superabsorbent material.
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16. A sanitary napkin as defined in claim 15, wherein said absorbent system includes a plurality of absorbent layers in a superposed condition.
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17. A sanitary napkin as defined in claim 1, wherein said sanitary napkin includes a fastener for retaining said sanitary napkin on an undergarment of a wearer.
Specification