Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-06-30
1998-08-18
Yu, Mickey
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604389, 604390, A61F 1315
Patent
active
057953503
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The invention relates to disposable absorbent articles comprising a mechanical fastening system.
Such a disposable absorbent articles are known from EP-A- 0 321 234.
Known mechanical fastening systems 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 in the front waist region. The landing member is a patch or strip of a loop-type material which is attached to the backsheet. The loop type material entangles with the hooks and has resistance against peel forces and shear forces.
The loop-type material used in the landing zone of the known mechanical fastening system is formed by a separate patch of material, attached to the garment-facing side of the backsheet. Such loop-type materials are a relatively expensive materials.
Furthermore, as the known loop- type materials are attached to the garment-facing side of the backsheet, the bulk of the absorbent articles is increased when these 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 in the complexity of the production process for making an absorbent article.
Furthermore, it is difficult to attach larger patches of loop-type material when the front waist region is made of an elasticated or of an elastically extensible material, such that the backsheet material is garthered. The patches of loop-type material, which are non-extendible and non-elastic, 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. The backsheet comprises a first section having a front peripheral edge which is located outside the landing zone, and a second section joined to the first section. The second section of the backsheet comprises a different material than the first section and is at least partly located in the front waist region so that the second section forms the landing member.
The first section of the backsheet underlies the absorbent core and may be formed by a liquid-impervious thermoplastic film or a film/fabric colaminate, the second section comprising a non-woven or other loop-type material which is adapted to engage with the hook-type material of the fastening members. In this way a soft and compliant waist panel is obtained in the front waist region to which no separate patches of looptype material need be attached. Hence a process simplification is obtained, and no additional bulk is added to the backsheet.
Furthermore, since the landing member is formed by the front waist section of the backsheet, the landing member substantially completely extends along the full width of the front transverse edge of the backsheet, and hence allows for numerous positions of attachment of the hook-type fastening members.
In case the front waist region is elasticated and is contracted in gathers by an elastic element, the landing member does not interfere with t
REFERENCES:
patent: 4014340 (1977-03-01), Cheslow
patent: 4585450 (1986-04-01), Rosch et al.
patent: 4869724 (1989-09-01), Scripps
patent: 5057097 (1991-10-01), Gesp
Cuddihy Francis K.
Miller Steven W.
Rasser Jacobus C.
The Procter & Gamble & Company
Weirich David M.
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