This disclosure relates to absorbent sanitary products.
This disclosure was devised with attention paid to its possible application to absorbent sanitary products that can be worn as pants.
For many years, the solution adopted in a practically uniform way by all the producers in the area of absorbent sanitary products has been that of making these products in the form of elements shaped according to a general hourglass conformation, with a central body including an absorbent core designed to collect the body fluids evacuated and two end parts, a front one and a rear or back one. The product is worn by bestowing thereon a general U-shaped conformation and bringing the median stretch of the central body (the so-called “crotch” portion) to extend between the legs of the user.
The end parts extended around. the waist of the user are connected to one another at the homologous side edges, fir example via adhesive tabs, which can normally be repositioned, or similar fastening elements as to be able to re-fasten the product around the body of the user.
These products have traditionally been manufactured and sold in an open condition, i.e., leaving it to the person who applies the product the task of setting it around the body of the user and refastening it according to a general pant-like conformation in the terms referred to previously.
Over the last few years, there has emerged interest in diapers (nappy-pants) of the type commonly referred to as “training pants”. When such a product is taken out of the pack, it has (already) a conformation that substantially resembles that of the pair of pants. It is put on by sliding it over the legs of the user according to criteria basically similar to the ones adopted for putting on pants.
By way of example, in
Side panels 16 extend laterally from the central body 12 so as to complete the pant-like configuration of the product 10.
Viewed ideally in an open and distended, condition (i.e. before being closed to a pant-like configuration) the product 10 has, at least approximately, an hourglass conformation as seen at the bottom of
The side panels 16 are provided with homologous distal edges 16a designed to be connected (pre-fastened) to one another to form lateral closure regions 18. As better detailed in the following, the pre-fastened closure regions 18 are intended to be re-fastenable, thus permitting the product which is sold in a pre-fastened, closed pant-like condition—to be selectively opened at either side in order to check e.g. whether the product is soiled.
The side panels 16 (which may be elasticated in order to provide a better “fit” of the product around the wearer's body) also include proximal edges 16b that are connected to the central body 12, e.g. by “sandwiching” these proximal edges 16b between the fluid-permeable topsheet 12a and the fluid-impermeable backsheet 12b of the central body 12 and securing it therebetween e.g. via adhesives bonding, ultra sound bonding or the like.
The representation of the product 10 provided in
In the arrangement of
Documents such as U.S. Pat. Nos. 6,761,711; 6,849,067; 6,645,190 or 7,534,237 are exemplary of arrangements of the type represented in
Arrangements as generally represented in
A feature of such arrangements is that (as shown in
Various patent documents such as U.S. Pat. Nos. 7,322,925; 7,335,150; 7,387,148 or EP-A-1 289 465, EP-A-1 289 466, OR EP-A-1 284 700 are exemplary of processes and apparatus which may be applied to manufacturing products are represented in
Despite the effectiveness of the results obtained, the various arrangements considered in the foregoing have an intrinsic disadvantage in that the associated manufactures processes and apparatus arc inevitably complex, expensive and exposed to criticalities in terms of reliability.
The object of the invention is thus to provide a solution dispensing with these drawbacks while leading to product structure retaining the advantages discussed in the foregoing.
According to the invention, that object is achieved by means of sanitary product having the features set forth in the claims that follow. The invention also relates to corresponding manufacturing process.
The claims are an integral part of the disclosure of the invention as provided here in.
The invention will now be described, by way of example only, with reference to the annexed representations, wherein:
In the following description, numerous specific details are given to provide a thorough understanding of embodiments. The embodiments can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the embodiments.
Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The headings provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
Various embodiments essentially correspond to the general structure of a sanitary product 10 as exemplified in
Various embodiments disclosed herein may have a number of features in common with the conventional arrangement, e.g. as already described in the foregoing. Again, those who are skilled in the art, while being fully cognizant of e.g. the details related to the choice of the material involved in the production of such a product and the related manufacturing process (unless otherwise described in the following), will also appreciate that the product 10 may include a wide gamut of additional features including waist-line elastications, elastications of the borders of the openings for the legs 17, or so-called “cuffs” or elasticated borders arranged along the sides of the absorbent core 14 with the function of providing lateral containment of body fluids.
Also, in order to avoid rendering this description unduly cumbersome, parts and features which have been already described, or parts or features equivalent to parts and features which have been already described are designated in
Various embodiments thus correspond to an absorbent sanitary product 10 wearable as a pant-like garment, including:
As used herein “connected” refers to the joining, bonding, attaching, or the like, of two elements. Iwo elements will be considered to be connected together when they are connected directly to one another or indirectly to one another, such as when each is directly connected to intermediate elements.
In various embodiments, the proximal edges 16b of the side panels 16 are connected to the central body by sandwiching them between the liquid pervious topsheet 12a and the liquid impervious backsheet 12b of the central body 12.
In various embodiments, the side panels 16 may be simply lateral extensions of the topsheet 12a and/or the backsheet 12b of the central body 12.
In various embodiments, at least one side panel 16 in the pair of complementary side panels provided on each side of the central body 12 may be elasticated to provide a better fit of the product around the body of the wearer.
Exemplary arrangements for producing side panels 16 that i.a. are elasticated (either as separate elements connected to the central body 12 or as lateral extensions of the topsheet 12a and/or the backsheet 12b) are disclosed, e.g. in WO 01/91666 A2.
Various embodiments corresponding to
In various embodiments, the loops of the loop element 18b of the closure may simply be comprised of the loops formed by fibres of an outer surface of the side panels 16. Consequently, while in the figures herein the loop element 18b of the hook-and-loop closure 18 is represented for the sake of clarity and understanding as a distinct feature applied on the side panel 16, those skilled in the art will promptly appreciate that the loop element 18b may be simply provided by surface loops of the side panel 16.
It will be further appreciated that, especially in the views of
Also, whether the side panel 16 appearing in an upper position in
By way of contrast with the arrangement of
The distal edge 16a of such a longer or wider side panel 16 can thus be folded over itself “inwardly” of the product 10 (i.e. towards the complementary side panel 16) to form an end loop portion 16c. Consequently, the corresponding side panel 16—once folded—will have again approximately the same width or length of the complementary side panel 16 which is not folded. Also, the side edge 16a which is folded over itself will exhibit a terminal rim 16d designed to be sandwiched between the two complementary side panels 16 when the product 10 is closed.
Reference 20 denotes a temporary line of connection (continuous or discontinuous) produced e.g. via a so called “technical” or “green” glue with the purpose of keeping the folded over portion of the distal edge 16d temporarily connected to the inner surface (i.e. the surface intended to face the wearer's body) of the respective side panel 16 in order to avoid that the portion bent may undesirably “flap” with respect to the corresponding side panel 16.
The two side panels 16 will thus be connected at their distal edges 16a via the closures 18 sandwiched therebetween namely via complementary hook-and-loop formations arranged:
When the product 10 is worn, the front and rear or back portion of the product (which rest against each other in the product as packaged flat) will be spread apart causing a corresponding spreading apart of the pairs of complementary side panels 16 at each side of the product 10. This will also result in any possible temporary connection as produced by the “technical” or “green” glue 20 being broken, while the complementary elements 18a, 18b will be safely prevented from exerting any negative action on the wearer's skin.
Once the product 10 is worn, the element of the hook-and-loop closure carried by the folded over portion (16e, 16d) will in any case face away from the wearer's body while the element mounted on the inner surface of the other side panel 16 (the one shown in the upper position in both
This will apply irrespective of the mutual location of the two elements 18a, 18b, i.e. irrespective of whether:
Once again, it is recalled that the loop clement 18b will not necessarily be a separate element but may be simply comprised of surface loops of the (e.g. non-woven) structure of the corresponding side panel 16.
In the representation of
As indicated, the exemplary embodiment considered in
Consequently, in the device 100 the material of the side panels 16 whose distal portions 16a carry (i.e. form) the loop elements 18b is first dispensed from a conventional source 104 (e.g. a roll dispenser having associated a splicer 104a to provide continuity of the web W1 dispensed). A folder device 106 cascaded to the source 104 folds over themselves the two longitudinal side edges thereof as schematically shown in
As shown in
The two mirror-symmetrical sub-webs thus produced are fed at 160a to an applicator unit 110 which performs the following operations:
The overall structure of the device 102 providing the side panels 16 that are not folded is essentially similar in that it again includes a source 112 including a splicer 112a to deliver a continuous web W2. The web W2 is fed to an applicator station 114 where individual “stubs” of hook material 18a are applied (e.g. by glueing, thermal bonding, ultrasound bonding) along the opposite sides of the web W2 as schematically shown in
The web W2 having the “hook” stubs 18a applied at its sides is fed to a longitudinal cutter device 116 where the web W2 is cut lengthwise along its longitudinal median axis XW2 to produce two mirror-symmetrical sub-webs for feeding at 160b to an applicator station 118, which again performs the operations of:
These blanks completed with the addition of the side panels are subsequently cut as shown at A and B in the lower portion of
The V- or U-folding operation performed at C will bring the complementary side panels 16 connected to the opposed ends of each product 10 at each side of the product 10 in a mutually facing position as represented in
The basic machinery layout illustrated in
The system illustrated in
For instance the sources of the web materials W1 and W2, including the “splicer” units 104a and 112a may be of the type disclosed e.g. U.S. patent publication US2007/0113984.
The folder device 106 may be of any of the types disclosed e.g. in Italian patent IT-B-195 581 or in Italian patent application PE92A000001 or PE2004A000001.
Apparatus adapted to perform the functions of the applicator stations 110 and 118 are disclosed (also in connection with the “repitch” function) in EP-A-1 772 403.
The material comprising the hook formations 18a may be of the type currently available with hook-binder GmbH of Tuttlingen (Germany).
When connection of the elements in question is by adhesive means, adhesives such as PM357 E available with Savarè Specialty Adhesives of Milan (Italy) may be used.
Again, while adhesively connected elements have been considered by way of example, various embodiments may adopt connection via thermal bonding, ultrasound bonding or combinations of the various techniques considered.
Those who are skilled in the art will promptly appreciate that the representation of
In the embodiment illustrated the elastication band is provided by an elastic material of any known type having a central or intermediate portion 200a which is connected (e.g. by gluing, i.e. by adhesive connection) to the central body 12 of the product 10 in order to provide a desired degree of elastication.
Reference 200b denotes an end portion of the material forming the elastication 200 which extends approximately (lengthwise of the product 10) in correspondence with the side panel 16. Another, symmetrical end portion—not visible in the drawing—is provided at the opposite end of the product 10.
While comprised of a material which is by itself elastic (namely capable of recovering its original size and shape after removal of a force causing a deformation) the end portions 200b are not connected to the central body 12 and thus does not provide any elastication effect proper.
Finally,
The dimensions of the active pads 180a and/or the spacing therebetween, i.e. the dimensions of the passive portions 108b may be either constant or possibly vary depending on specific needs and requirements.
Manufacturing of an element as considered herein may involve simply modifying a current manufacturing process of hook or loop elements of a hook-and-loop closure involving applying/forming hooks or loop formations on a flexible support tape so that hooks (or loops, respectively) are not applied/formed on the “passive” areas 180b, which are thus free of hooks or loops.
Resorting to the arrangement exemplified in
The representation of
This will ensure that once the individual products 10 are separated A and B are shown in
Of course, without prejudice to the underlining principles of the invention, the details and embodiments may vary, even significantly, with respect to what has been described and illustrated herein merely by way of example, without departing from the scope of the invention as defined by the annexed claim.
This application is a continuation of U.S. patent application Ser. No. 12/914,422, filed on Oct. 28, 2010, and published as US 2011/0106042 A1 on May 5, 2011, which claims priority to U.S. Provisional Application No. 61/256,163 filed Oct. 29, 2009, the entire disclosures of which are incorporated herein by reference.
Number | Date | Country | |
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61256163 | Oct 2009 | US |
Number | Date | Country | |
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Parent | 12914422 | Oct 2010 | US |
Child | 14475086 | US |