Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-06-30
1998-07-28
Polutta, Mark O.
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604386, A61F 1315
Patent
active
057856990
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to disposable absorbent articles comprising a mechanical fastening system.
Such disposable absorbent articles are known from EP-A- 0 321 234.
Known mechanical fastening system for use in disposable absorbent articles comprise tape tabs in the back waist region, having hook-type fastening elements which mechanically engage with a landing member located in the front waist region. The landing member is a loop-type material which entangles with the hooks and has resistance against peel forces and shear forces.
The loop-type materials used in the landing zone of the known mechanical fastening systems are relatively expensive materials.
Furthermore, the known loop-type materials are attached to the garment- facing side of the backsheet and increase the bulk of the absorbent articles when they are packed in a compressed array.
Another drawback of the addition of separate patches of loop-type material in the landing zone, is an increase of the complexity of the production process for making an absorbent article.
Furthermore, it is difficult to attach larger patches of loop-type material to the garment-facing side of the backsheet when the front waist region is elasticated, or is made of an elastically extendible material, such that the material in the front waist region is gathered. The patches of known loop-type material, which are nonelastic, may impair the elastic properties of the front waist region.
It is therefore an object of the present invention to provide an absorbent article having a mechanical fastening system which is of simple construction and which is cost-effective.
It is another object of the invention to provide an absorbent article comprising a mechanical fastening system which is of low bulk when packed in a compressed array.
It is another object of the invention to provide an absorbent article comprising a mechanical fastening system which can effectively be combined with an elasticated waist region without impairing the elasticity thereof.
SUMMARY OF THE INVENTION
An absorbent article according to the invention comprises a garment-facing backsheet having two longitudinal sides, a front transverse edge, and a back transverse edge. The article has a mechanical closing system comprising at least two hook-type fastening members located in the region of the back transverse edge and extentending transversely beyond each longitudinal side. A landing member is located in the region of the front transverse edge for mechanically engaging with the hook-type fastening member. An inner layer covers at least a part of the backsheet on the user-facing side thereof and projects beyond the front peripheral edge of the backsheet to form at least a part of the landing member.
By employing a backsheet which is shorter than the inner layer, the fibrous inner layer is exposed in the front waist region. The fibrous inner layer may be the topsheet which covers the absorbent core, or may be a layer which is located below the absorbent core or which envelopes the core. By selecting the hook-type fastening members to match the non-woven material that is regularly employed as an inner layer, the hooks can mechanically engage with these layers to fasten the absorbent article around a wearer.
For inner layers, which may be nonwoven layers, having relatively little surface irregularities, relatively small and sharply pointed hooks will be required for the hook-type material. For non-woven inner layers which comprise a number of loops at their surface, the hooks of the hook-type material may be a larger size and may be relatively flexible. Alternatively, the surface texture of the inner layers can be selected to match a given type of hook-fastening material to achieve proper fastening.
By using the nonwoven materials which are normally employed on the user-facing side of the backsheet as a landing member, no additional loop-type material need be employed as a landing member. Attaching the inner layer to a relatively short backsheet, forms a process simplification compared to
REFERENCES:
patent: 4681581 (1987-07-01), Coates
patent: 4769023 (1988-09-01), Goebel et al.
patent: 4861652 (1989-08-01), Lippert et al.
patent: 5112326 (1992-05-01), Quadrini
patent: 5176671 (1993-01-01), Roessler
patent: 5318555 (1994-06-01), Siebers et al.
Miller Steven W.
Polutta Mark O.
Rasser Jacobus C.
The Proctor & Gamble Company
Weirich David M.
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