Generally thin, flexible sanitary napkin with stiffened center
First Claim
1. A sanitary napkin having a length, a width, a longitudinal centerline, a stiffened longitudinal central region disposed along the length of at least a portion of the longitudinal centerline, and longitudinal side regions outboard of the longitudinal central region, a flexure resistance as measured through said longitudinal side regions and a flexure resistance as measured through said stiffened longitudinal central region, said sanitary napkin comprising:
- a liquid pervious topsheet;
a liquid impervious backsheet joined to said topsheet;
an absorbent core positioned between said topsheet and said backsheet;
wherein said stiffened longitudinal central region has a length that is less than one half the length of said sanitary napkin, said longitudinal side regions have absorbent capacity, and the flexure resistance of said sanitary napkin as measured through said longitudinal central region is greater than the flexure resistance of said sanitary napkin as measured through the longitudinal side regions, and said sanitary napkin has a caliper as measured through said longitudinal side regions of less than about 5 mm.
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Accused Products
Abstract
A generally thin, flexible sanitary napkin capable of absorbing medium to high menstrual flows, and having a stiffened center is provided. In one embodiment, the sanitary napkin has a longitudinal central region is disposed along the length of at least a portion of the longitudinal centerline, and longitudinal side regions are disposed outboard of the longitudinal central region. The longitudinal central region of the sanitary napkin has a flexure-resistance that is greater than that of the longitudinal side regions. The embodiment of the sanitary napkin described above easily forms around the curvature of the wearer'"'"'s labia majora by cupping and surrounding the exterior of the labia majora. The longitudinal central region of the sanitary napkin forms the bottom of a cup-like trough under the wearer'"'"'s labia majora, and the longitudinal side regions are sufficiently flexible that they are able to form the sides of the trough structure.
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Citations
19 Claims
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1. A sanitary napkin having a length, a width, a longitudinal centerline, a stiffened longitudinal central region disposed along the length of at least a portion of the longitudinal centerline, and longitudinal side regions outboard of the longitudinal central region, a flexure resistance as measured through said longitudinal side regions and a flexure resistance as measured through said stiffened longitudinal central region, said sanitary napkin comprising:
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a liquid pervious topsheet;
a liquid impervious backsheet joined to said topsheet;
an absorbent core positioned between said topsheet and said backsheet;
wherein said stiffened longitudinal central region has a length that is less than one half the length of said sanitary napkin, said longitudinal side regions have absorbent capacity, and the flexure resistance of said sanitary napkin as measured through said longitudinal central region is greater than the flexure resistance of said sanitary napkin as measured through the longitudinal side regions, and said sanitary napkin has a caliper as measured through said longitudinal side regions of less than about 5 mm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A sanitary napkin having a longitudinal centerline, a stiffened longtudinal central region disposed along the length of at least a portion of the longitudinal centerline, a transverse centerline, two longitudinal edges, two end edges, a first end region extending from one of said end edges toward said transverse centerline, a second end region extending from the other end edge toward said transverse centerline, and a central region between said first and second end regions, a flexure resistance as measured through said end regions and a flexure resistance as measured through said stiffened longitudinal central region, said sanitary napkin comprising:
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a liquid pervious topsheet;
a liquid impervious backsheet joined to said topsheet;
an absorbent core positioned between said topsheet and said backsheet, said absorbent core having two longitudinal edges and a width defined by said longitudinal edges;
wherein said stiffened longitudinal central region has a transverse width greater than or equal to about 5 cm, said longitudinal side regions have absorbent capacity, and the flexure resistance of said sanitary napkin as measured through said central region is greater than the flexure resistance of said sanitary napkin as measured through said first and second end regions, and said sanitary napkin has a caliper as measured through said first and second end regions of less than about 5 mm. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification