Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Patent
1997-03-27
1998-07-14
Jones, Mary Beth
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
604389, 428 40, 428 99, 428100, 428152, 428176, 428343, 428913, 156 731, 156 734, 156183, 156210, 156250, A61F 1356, B32B 3118, C09J 704
Patent
active
057796912
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a fastening tape for a sanitary article, particularly disposable diaper, for fastening of the article on the body of a person, the fastening tape being attached to the article at one of its end portions and being provided with a fastening means on one surface of the other end portion, a stretchable elastic portion being provided between the end portions. The invention further relates to a method for producing the fastening tape.
Conventional sanitary articles like disposable diapers are provided with fastening tapes attached to the diaper and provided with a layer of pressure-sensitive adhesive at the end portion thereof. The tapes are used to close the diaper round the wearer's body and to fasten the diaper on the body. Among these fastening tapes, there have also been elastically stretchable tapes to improve the fit and the comfort of the articles.
However, if the part of the tapes covered by the adhesive layer is stretchable as disclosed by the U.S. Pat. No. 4,063,559 or the EP-A1 0 191 355, the tape may be inadvertently released by peeling off under a predetermined stress. Other conventional stretchable fastening tapes as disclosed by the EP-A2 0 249 073 or the EP-A1 0 487 758 consist of stretchable and non-stretchable portions being connected in the longitudinal direction end to end or by overlapping. In these cases, providing of a reliable connection between the portions under industrial conditions with acceptable costs has not yet been possible.
On the other hand, it is not easy to exactly achieve a predetermined elasticity of the tapes. If the forces necessary to stretch the tape exceed a certain limit, there will be no effect and the wearing comfort will not be improved. On the other hand, if the tape is too soft, over-stretching of the tape may occur by which the diaper may get loose or even open.
Thus it is the main object of the invention to provide a fastening tape for a sanitary article useful for the wearing comfort of the article by a comparably soft resiliency without the risk of over-stretching of the tape.
Moreover, it is an object of the invention to provide a tape of the above kind which can be easily manufactured at low costs, and a method of producing the tape accordingly.
To comply with this object, a fastening tape according to the present invention is characterized in that a tape section of a stretchable elastic material is secured to the fastening tape at least at both ends thereof, to bridge a non-linear section of the fastening tape which is longer than the-stretchable elastic tape section.
Thus the invention provides a combination of an elastic tape, to improve wearing comfort of the article in question, and a non-elastic tape which has a kind of stop function determining the maximum extension of the elastic section to avoid rupture thereof.
The tape section of stretchable elastic material may be secured to the fastening tape at the ends of the elastic material only or along the whole length of the elastic tape or in integrals. Securing the elastic tape in intervals will be particularly suitable in case the section of the fastening tape bridged by the elastic tape achieves a zigzag-folding by a suitable die, particularly by ringrolling. In this case, the vallies of the zigzag-shape may be secured to the elastic tape. Securing the tapes in intervals may be realized by an adhesive or also by different types of welding methods.
In any case, the length of the fastening tape bridged by the elastic tape must be longer than the elastic tape in the relaxed length. In this position the foldings will appear and will make sure that the fastening tape does not deform away from the elastic tape. On the other hand, if the elastic tape is stretched into a predetermined position, the fastening tape will be extended to the straight position thereof where the zigzag-form disappears.
Preferably, foldings are formed in the portion of the fastening tape bridged by the elastic tape section which disappear more and more when the elastic tape section is stretched.
If the lami
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patent: 4857067 (1989-08-01), Wood et al.
patent: 5092862 (1992-03-01), Muckenfuhs et al.
Cummings Theodore P.
Jones Mary Beth
Miller Steven W.
Rasser Jacobus C.
The Procter & Gamble & Company
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