Surgery – Means and methods for collecting body fluids or waste material – Absorbent pad for external or internal application and...
Reexamination Certificate
2001-07-11
2003-09-02
Reichle, Karin (Department: 3761)
Surgery
Means and methods for collecting body fluids or waste material
Absorbent pad for external or internal application and...
C604S389000, C604S391000, C002S400000
Reexamination Certificate
active
06613032
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a product, which product is absorbent or can act as a support for an absorbent product, with the product having a longitudinal direction, a transverse direction, an upper side and a lower side, and the product comprises a front waist section, a back waist section and a middle section which is located between the waist sections, which front waist section is provided with front fastening members and has first regions in connection with the said front fastening members, which back waist section is provided with back fastening members and has second regions in connection with said back fastening members, with the said front or back fastening members being able to receive and co-operate with the other of the said front or back fastening members, respectively, and a first fastening ability between the said front and back fastening members thereby being exhibited, and the said first fastening ability comprises a first shearing strength and a first peeling strength.
TECHNICAL BACKGROUND
Products, which products are absorbent or can act as supports for absorbent articles, which, during use, are fastened around a user's body at, for example, the waist or the hips, can, for this purpose, be provided with fastening members. The fastening members can, for example, be re-sealable tapes and an appurtenant reception zone (TLZ) consisting of reinforcing material, or a combination of hook and loop members (e.g. Velcro®). Since the cost of the fastening members, in particular the cost of the combination of hook and loop members, has constituted a considerable part of the total cost of the said products, there has been a desire to reduce the cost of the fastening members. One way of reducing this cost is to make the fastening members as small as possible. Since technical development of fastening members has resulted in a decrease in the fastening area, i.e. the contact area through which the fastening members receive and co-operate, which is required for obtaining sufficient shearing or peeling strength, it is also possible to make the fastening members small. In the present context, shearing strength denotes the ability, per unit of area, of the co-operating fastening members to withstand shearing forces, which act parallel to the said fastening area, and, in the present context, peeling strength denotes the ability, per unit of length, of the co-operating fastening members to withstand peeling forces, which act perpendicular to the said fastening area. Fastening ability is the expression that is hereinafter employed to designate shearing strength and peeling strength taken together. The fastening area which is required for sufficient fastening ability is now so small that sufficient fastening ability can be exhibited even if the fastening members only receive each other partially. This simplifies the fastening of the product due to the fact that the relatively small fastening members do not need to receive each other fully for the function of the product to be acceptable. Furthermore, the fact that the fastening members receive each other partially also provides certain possibilities for adjusting the fit of the product. However, the fact that the fastening members receive each other partially has also meant that non-activated (inactive) parts of the fastening members are exposed to their environment and consequently run the risk of catching in objects in the environment, for example the user's underclothes, bedclothes or the like, a situation which in turn increases the risk of the product being opened unintentionally.
In the case of a product in accordance with the present invention, there is no longer any risk of the parts of the fastening members which have not been received catching in objects in the environment and consequently there is no risk, either, of the product being opened unintentionally.
SUMMARY OF THE INVENTION
The present invention relates to a product, which product is absorbent or can act as a support for an absorbent article, with the product having a longitudinal direction, a transverse direction, an upper side and a lower side. Furthermore, the product comprises a front waist section, a back waist section and a middle section which is located between the waist sections, with the said front waist section being provided with front fastening members and having first regions in connection with the said front fastening members, and the said back waist section being provided with back fastening members and having second regions in connection with the said back fastening members. The said front or back fastening members can receive and co-operate with the other of the said front or back fastening members, respectively, and a first fastening ability between the said front and back fastening members is thereby exhibited, with the said first fastening ability comprising a first shearing strength and a first peeling strength. Furthermore, the said front fastening members or the said back fastening members have a first extent principally in the longitudinal direction of the product and the other of the said front fastening members or said back fastening members, respectively, have a second extent principally in the longitudinal direction of the product. An extent ratio, which extent ratio is at least 1.5, is exhibited between the said second extent and the said first extent. Furthermore, the said first regions can receive, and co-operate with, the said back fastening members, and a second fastening ability is thereby exhibited between the said first regions and the said back fastening members, and/or the said second regions can receive, and co-operate with, the said front fastening members, and a third fastening ability is thereby exhibited between the said second regions and the said front fastening members. The said second fastening ability comprises a second shearing strength and a second peeling strength, and the said third fastening ability comprises a third shearing strength and a third peeling strength. Furthermore, a first shearing strength ratio is exhibited between the said second shearing strength and the said first shearing strength, and a second shearing strength ratio is exhibited between the said third shearing strength and the said first shearing strength, both of which shearing strength ratios are less than 1.0, and a first peeling strength ratio is exhibited between the said second peeling strength and the said first peeling strength, and a second peeling strength ratio is exhibited between the said third peeling strength and the said first peeling strength, both of which peeling strength ratios are less than 10, with the said second and third shearing strengths being greater than zero the said second and third peeling strengths being greater than zero.
The said product can be an absorbent disposable product of the type which is fastened around a user's body at, for example, the waist or the hips, for example, napkins for babies or individuals who suffer from incontinence, or an absorbent or non-absorbent product of the underpants type having resealing devices on a level with the user's waist or hips. Furthermore, the said product can be an absorbent or non-absorbent product of a type in which back or front fastening members comprise a belt having fastening devices, with it being possible for the said belt to be integrated with, or separate from, the remainder of said product: see the products which are described in EP, A, 0696911. When the said product is a non-absorbent product, the said product can act as a support for an absorbent article, for example a napkin, a sanitary towel, a panty shield or an incontinence protection.
Furthermore, the longitudinal direction of the product extends from the back waist section to the front waist section, and the transverse direction of the product goes transversely to the said longitudinal direction, with the back waist section being the waist section which bears against a user's seat or back and the front waist section being the waist section which be
Fernfors Ingemar
Ronnberg Peter
Sandin Cecile
Reichle Karin
SCA Hygiene Products AB
Young & Thompson
LandOfFree
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