Thin sanitary napkin allowing for 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 further comprising:
- a) a fluid-pervious cover layer;
b) an absorbent system under said cover layer;
c) a liquid-impervious barrier layer under said absorbent system;
d) said sanitary napkin being characterised by a thickness less than about 5 mm;
said liquid-impervious barrier layer including a pair of linear adhesive zones that extend along said longitudinal axis and are adjacent to respective side edges of the sanitary napkin, said linear adhesive zones being capable of bonding said sanitary napkin to the undergarment;
said main body including a preferential bending line extending obliquely in relation to said longitudinal axis on said main body, said preferential bending line extending from one longitudinal side area of the sanitary napkin to an opposite longitudinal side area, crossing the longitudinal axis of the sanitary napkin; and
wherein said sanitary napkin is characterized by a flexural resistance of not less than about 400 g.
5 Assignments
0 Petitions
Accused Products
Abstract
The present invention provides a sanitary napkin that is thin (less than 5 mm in thickness), highly absorbent and has a lateral flexibility allowing for controlled deformation when in use, namely the assumption of a “W” pattern. 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. In a specific example, the sanitary napkin is characterized by a pair of preferential bending zones extending along the longitudinal axis of the sanitary napkin and by a pair of longitudinal adhesive zones on the liquid-impervious barrier layer of the sanitary napkin, that register with the preferential bending zones. The longitudinal adhesive zones fasten the sanitary napkin to the undergarment at the areas at which the sanitary napkin is intended to fold when subjected to lateral compression. This feature allows the napkin to fold and adopt a desired three-dimensional deformation profile in a predictable manner when laterally compressed.
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Citations
13 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 further comprising:
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a) a fluid-pervious cover layer; b) an absorbent system under said cover layer; c) a liquid-impervious barrier layer under said absorbent system; d) said sanitary napkin being characterised by a thickness less than about 5 mm; said liquid-impervious barrier layer including a pair of linear adhesive zones that extend along said longitudinal axis and are adjacent to respective side edges of the sanitary napkin, said linear adhesive zones being capable of bonding said sanitary napkin to the undergarment; said main body including a preferential bending line extending obliquely in relation to said longitudinal axis on said main body, said preferential bending line extending from one longitudinal side area of the sanitary napkin to an opposite longitudinal side area, crossing the longitudinal axis of the sanitary napkin; and wherein said sanitary napkin is characterized by a flexural resistance of not less than about 400 g. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification