CZ31394A3 - Napkin panties provided with impervious side pockets and impervious pockets of a belt - Google Patents

Abstract

Diaper comprising an external sheet (1) impervious to liquids having a general elongate shape and provided with a front part and a back part, an absorbing mattress (2) having also a generally elongate shape, and an internal sheet (3) permeable to liquids. The external sheet (1) has substantially the same width throughout the length of the diaper. Two sealing side barriers formed by bands (9) of material permeable or impervious to liquids, provided with an elastic element (10) at the vicinity of their edge directed towards the axes of the diaper are provided on either side on the length of the diaper while forming liquid-tight side pockets. Two transverse liquid-repellent bands (12) are fixed to the internal sheet (3) in the front part and in the back part so as to form liquid-repellent waist pockets, said bands having dimensions in the transverse direction which are larger than the width of the external impervious sheet and carrying adhesive fastening devices (7).

Description

Diaper pants fitted with non-perforating side-pockets and non-leaking pockets

Technical field

The present invention relates to diapers for infants or non-restrained adults of the type comprising an outer sheet which is liquid impermeable and adapted to receive an absorbent cushion 3, the assembly being configured to effect an offset on each side of the member panties passage for nchy.

BACKGROUND OF THE INVENTION

Diapers of this type are already known and are mass produced continuously from a continuous film of synthetic material made, for example, of thin polyethylene, which is unwound from a reel and coated with hot melt adhesive lines or strips. Individual absorbent pads deposit at intervals on this continuous film. Then, a continuous sheet of permeable material, such as a nonwoven of

a fabric so as to adhere to said impermeable sheet at least along its longitudinal edges. Longitudinal elastic elements are applied and fastened on each side of the longitudinal edges of the absorbent pad to the continuous film of the impermeable synthetic material or to the web of permeable material made of nonwoven. Then, in the assembly thus formed, a suture is produced in the crotch region to give the diaper panties, which still retain a width in their front and back that is greater than the width of the corresponding front and back portions of the absorbent pad, in an anatomical shape.

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In certain cases, it is also possible to fasten the individual absorbent pads to a continuous film of impermeable synthetic material permanently by means of an adhesive bond, but rather to construct the diaper in the form of a durable sheath, inside which the insert can be disposed as an absorbent element. .

In all cases, these known processes and products do not have the disadvantage that they require a considerable uneconomical consumption of the wool raw materials that form an outer, impermeable sheet of diaper

The panty as well as the unnecessarily inner permeable foil, thanks to the losses caused by the sidecuts that are made in the crotch area to create passages for the legs adapted to the anatomy of the wearer.

If all diapers of a known type are described, as described, for example, in the French patent application, the sutures for the passage of the legs have avoided us, but this results in poor tightness at the points of these passages.

It is therefore an object of the present invention to solve the problems of the prior art, and in particular to allow the construction of lateral leg passages that are both suitably enforced and perfectly impermeable to liquids.

Thus, the present invention allows for a significant reduction in the raw material consumption that occurs in most conventional diaper manufacturing processes, i.e., a reduction in the manufacturing cost of these products while providing a perfect seal against leakage, especially at the side foot passages.

SUMMARY OF THE INVENTION

Diapers for infants or restrained adults

According to the invention, they are of the type comprising an outer sheet which is impervious to liquids, is generally elongated in shape and is provided with a front portion and a rear portion. The impermeable sheet is adapted to receive an absorbent pad that is also generally elongated in shape and is disposed on the impermeable sheet, wherein the absorbent pad may be covered with an inner

foil which is permeable to liquids. This assembly is designed to allow a leg to pass through each side of the diaper. Adhesive fastening means may also be provided near the side edges of the back of the permeable sheet.

The invention consists of a combination of the following features:

The impermeable outer fabric has substantially the same width along the length of the diaper. On each side, two side, non-leaking bulkheads are provided along the length of the diaper, formed by strips of material which is permeable or impermeable to liquid and near its edge oriented to the axis of the diaper, provided with at least one elastic element positioned within the edge regions of the absorbent pad; create side leak / _{out of} pocket. Two transverse liquid-impermeable strips are attached to the liquid-impermeable outer sheet and / or to the liquid-permeable inner sheet in the areas pertaining to the portions and back of said impermeable outer sheet. The transverse strips have transverse dimensions that are larger than the width of the impermeable outer film.

In this situation, the assembly formed, in particular, by an impermeable outer film and two transverse strips of greater width, constitutes lateral leg passages that are suitably pushed through. The lateral leak tightness is completely ensured by two lateral non-leaking baffles forming non-leaking pockets.

The transverse strips, which are impervious to liquids, have in

preferably at least one softened transverse portion. These thus represent impermeable front and rear transverse bulkheads with a portion of the elastic waistband for the diaper.

The longitudinal edges of the impermeable sheet may, in some preferred embodiments, be folded into Z on each side of the absorbent sheath along the length of the diaper. The two lateral leaking partitions may then be attached to the longitudinal edges of the impermeable film on the folded portion positioned substantially in the same plane as the inner face of the absorbent pad. Such attachment of the side leak barriers allows to greatly increase their efficiency by improving the contact of said leakage barriers with the pants of the diaper wearer.

Preferably, one or more elongate elastic elements are attached to the longitudinal edges of the impermeable sheet at least in the region of the side leg passages at either side of the absorbent pad in order to improve the adhesion of the diaper with respect to the wearer's anatomy while contributing to the lateral leak seal.

In some embodiments, the absorbent cushion mounted on the inner face of the impermeable outer sheet may be permanently interposed between the sheet and the permeable sheet.

Outside foil.

Advantageously, the side non-leaking baffles may be affixed to the inner face of the permeable sheet near the longitudinal edges of the absorbent pad.

In a variant permitting the formation of double non-leaking clads, two lateral non-leaking baffles are mounted in their central region, each of their free ends having a resilient element. Each side non-leaking partition thus forms a double non-leaking pocket near the corresponding edge, i.e. the longitudinal edge of the absorbent pad.

In other embodiments, the absorbent pad may be simply inserted removably within the permanent sheath formed by an impermeable outer sheet, two lateral, non-permeable bulkheads, and two impermeable transverse strips. Order v

For example, it is preferable for the longitudinal edges of the impermeable sheet to be folded into Z as described above.

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In all cases, the adhesive fastening means are preferably attached directly to the transverse strip located in the region of the back of the impermeable outer film.

Fopis pictures in drawings

The invention will be better understood by studying several embodiments presented by way of examples, which are in no way limiting and are illustrated by the accompanying drawings, in which:

Figure 1 - a plan view of a first embodiment of a diaper according to the invention with certain cut out portions;

Figures 2, 3 and 4 - are section views taken along section lines II-II, III-III and IV-IV in Figure 1;

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is a plan view n with an alternative embodiment with some cut out parts;

and 7 are sectional views taken along respective section lines VI-VI and VII-VII of Figure 5;

Is a plan view with partial cuts of a second embodiment of a diaper according to the invention;

S, 10 and 11 are sectional views along section lines IX-IX, X-X and XI-XI of Figure E;

- is a plan view with partial cut-outs of a third embodiment of a diaper according to the invention, comprising a durable impermeable cover and an absorbent pad inserted into said cover, and

13, 14 and 15 are sectional views taken along section lines XII1-XIII, XIV-XIV and XV-XV in Figure 12.

DETAILED DESCRIPTION OF THE INVENTION

As shown in Figures 1 to 4, the diaper of the present invention consists of an outer sheet which is impervious to liquids, is made, for example, of polyethylene, and is obtained from a continuous film of synthetic material less than the width of the finished diaper, It is equal to 2. ^ 1. However, the width of the film 7 is sufficient to slightly exceed the transverse dimensions of the edges of the front and rear portions of the absorbent pad 2, its front edge 2a being arranged at the bottom of Figure 1, while its rear edge 2b is located at the top of Figure 1. a sheet of permeable material of a width equal to or slightly less than the width of the film 1 > 3 ^ε adhered to the inner face of said film after application of the absorbent pads 2 arranged at uniform intervals and fastening them by adhesive means to said film 17; that the adhesive bond of the permeable material web 3 has its place directly around the various absorbent pads 2 in the film zones 5.

Non-leaking partitions S, which are also visible on i

3, an Iscu formed of a web of permeable material made, for example, of a nonwoven material, and is near its edges disposed in the direction of the longitudinal axis of the diaper lined with an elastic element 10. As can be seen from FIG. of non-leaking partitions 9 and is within these v

a folding fastened in a tensioned state and at least part of its length, for example by means of; the hot-adhesive coating applied over the circumference of the elastic element. The elastic element may be formed in the form of a strand or a thin fiber made of rubber and the like, or additionally of a resilient narrow strip. generally, the same materials and shape will be used for the elastic elements 10 as for the lateral elastic elements 5 described below. The side non-sagging baffles 9 sit on the permeable inner film J during manufacture, i.e., with the inner

3, and fixed to the said film in the release film 3 by means of at least one continuous longitudinal adhesive line 11 near the longitudinal edges of the absorbent pad 2. As can be seen from Figure 3, the adhesive line 11 is positioned above, i.e. to the inner side of the absorbent pad 2 near its longitudinal edge. Side non-leaking partitions 9 equipped with their elastic element 1 □

They are thus able to form leaking pockets at the longitudinal edges of the absorbent pad 2.

In the subsequent production step, transverse strips 12 are applied at uniform intervals perpendicular to the direction of manufacture of the diaper and through the continuous web 3 of the permeable material and the longitudinal ends of the side non-leaking baffles 9 These transverse strips 12 have transverse dimensions relative to the longitudinal axis. greater by 2 than the width of the synthetic material film. The transverse stripe 12 is arranged symmetrically so that a portion of the width remains on each side can be seen from Figure 1. The length of the transverse stripe 12 in the production direction is 2A, where A is the distance that divides the transverse edge of the subsequent diaper from the area absorbent pad 2 close to His

7 a transverse edge and substantially overlapping its respective front and rear portions 2a, 2b.

The transverse strips 12 may consist of a composite material that is impermeable to liquids and at least partially softened. By way of example, Figure 2 shows an impermeable transverse strip 12 which inwardly outwardly consists of a liquid-permeable nonwoven web, a polyethylene impermeable sheet 13 and a resilient element 6 as a strip intended to form the softened portion of the diaper tape after they have been made.

The impermeable transverse strips 12 are attached to the continuous permeable stripe 3 and / or to the impermeable synthetic material film 7 by any means, such as an adhesive bond, heat sealing and the like.

Several elastic elements 5, which consist, for example, of parallel thin fibers or strands, which in the example shown in the number of four, are fixed in tension to each other on each side of the absorbent pad 2 in the edge zones 6 of a continuous impermeable film 1. or the fibers may have, for example, a substantially circular cross-section preferably having a significant elongation property of the order of 300 to 400%. It may be made of rubber or any other suitable material. The fortification is preferably carried out by coating the strands with hot glue over their entire perimeter. It is also possible to replace these strands with narrow elastic strips positioned in parallel and fastened with a hot-soluble adhesive coating on one or both faces. Such narrow strips generally have an elongation of 133 to 230%. In all cases, the glued joint of the elastic element is made only in the central region of the diaper, which essentially corresponds to the lateral depressions for the passage of the legs, while portions of the elastic elements that subsequently correspond to their ends are not bonded by the adhesive.

In the example shown in Figure 1, the assembly so formed should also be formed in each of the lateral edges of the assembly so formed in the area subsequently designed to form the side passages ε

for the feet, knock out 14 diaper pants to improve their anatomical fit. These cutouts 14 are formed in the film 2, the strip 3 and the transverse strips 12. The portions of the matte nuts that are removed are shown in Figure 1 as transverse hatching. Compared to the manufacture of conventional diapers in which the continuous film 2 has a finite diaper width, it appears that the process of the present invention makes it possible to achieve substantial savings in terms of raw materials, both as an impermeable film made entirely of polyethylene and a permeable film produced. of nonwovens. Saving surface area There is approximately 2.41 χ crotch length for each diaper manufactured.

The last stage of manufacture consists in the transverse cutting of the thus obtained continuous composite structure to form a series of separate diaper pants. The cutting is carried out in an area located between two successive absorbent pads 2, each dividing the transverse stripe 12 into two equal lengths A, which, as shown in Figure 1, are located in respective regions of the front portion 2a and the back portion 2b of the absorbent In this beautiful operation, the ends of the elastic elements 5, which are not glued, are generally pushed inside the elements of the diaper.

The obtained diaper panties are provided at their front and start end regions with softened transverse leak barriers represented by transverse strips 12 provided with softened areas B that somehow form leaky pocket pockets. However, as can be seen from Figure 2, the free transverse edge of the transverse stripe 12 positioned above the absorbent pad 2 forms an effective leakproof pocket of tape □ width A.

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It should be noted that the adhesive fasteners 7 are fastened directly to the transverse strip 12 _t which corresponds to the back of the diaper.

The inspection of Figure 3 further shows that the diaper further comprises side leak pockets that they represent

9 of the softened partition 9, the outer edges of which are also located above the absorbent pad 2, i.e. on the side of its inner face.

In this way, diaper pants are obtained which can be made not only at reduced cost but which also have improved leak tightness properties.

5 to 7 differ substantially in the embodiment of FIGS. 1 to 4 essentially in the use of lateral leak-free baffles 15 mounted in their central region by the longitudinal adhesive zone 16 so as to form a non-leaking kepsu 15a, 15b on each side of said central region. The leaking pocket 15b is oriented to the longitudinal axis of the diaper, while the leaking pocket 15a is oriented in the opposite direction. In these circumstances, each side leak barrier 15 is a double leak pocket equipped with at least one elastic element 10. The pockets 15a and 15b may have the same width, but preferably the inner pocket 15b may be narrower than the outer pocket 15a. In addition, by attaching a plurality of elastic elements to the free edge of the impermeable pocket 15a, it is possible to reduce or completely circumvent the elastic elements on the impermeable sheet.

It should also be noted that in the example shown, the absorbent pad 2 has a rectangular shape unlike the hourglass shape shown in the embodiment of Figure 1.

Naturally, another shape of the absorbent pad could also be envisaged.

the other elements which are identical to the previous embodiment bear the same reference numerals.

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In Figures 8 to 11, which illustrate a further embodiment of the invention, like-like parts bear the same reference numerals.

In this embodiment, the diaper comprises a liquid-impermeable outer sheet 1 made, for example, of polyethylene, having a generally rectangular shape and its longitudinal edges folded along the longitudinal edges of the absorbent pad 2, for example having a flat ebsorbent faceplate. The Z-folding has a first portion 1 and in substantially the same plane as the outer face of the absorbent pad 2, while the folded portion 1b and the portion 1c are positioned substantially in the same direction. It is fastened to the periphery of the absorbent pad 2 on the permeable inner film 3.

The plurality of longitudinal elastic members 5 are fixed in a state of condition and mutually parallel to each other along the longitudinal edges of the outer sheet 16, as can be seen from Figure 11, thus disposing a non-folded portion 1c which is substantially in the same plane as the inner face absorbent z

cushions, after the latter film has been folded into form Z.

These diaper pants include side-slotted, non-leaking partitions 9 equipped with pre-elastic striped elements 10, for example of a hydrophilic or hydrophobic nonwoven fabric. These v

the strips are fastened at least with an end longitudinal edge opposite the longitudinal axis of the diaper on the fold portion 1c. This elastic element 10 is disposed opposite the longitudinal axis of the diaper above the absorbent pad 2, i.e. with respect to the interior of the absorbent pad 2 to opening the non-leaking partitions 9 to form such non-leaking pockets and returning them to their original state when the wearer of the diaper is worn.

It should be noted that the attachment of the leak-free webs 9 to the folded portion 1c of the impermeable outer sheet 1 makes it possible to increase the efficiency of the leaky pockets by improving the contact of these elements with the elastic pants of the diaper wearer.

The diapers of this embodiment are also provided with softened transverse leak barriers 17 located in the diaper waistband regions, i.e., at their front and rear end portions. As in the previous embodiment, the baffles 17 have dimensions greater in length than the transverse width of the impermeable outer sheet 7 after folding its longitudinal edges to Z. The width of the baffles 17 in the longitudinal direction of the diaper is sufficient to overlap the transverse edges of the absorbent pad 2. 9, the baffles 17 are fixed to the liquid-permeable inner film J and also to the longitudinal ends of the side non-leaking baffles 9 by means of an adhesive bond or some other suitable means.

The non-leaking baffles 17 may consist of a rectangular member of a composite material that is impermeable to liquid and softened at least in part of its top in the transverse direction of the diaper. As shown in Figure 9, in the illustrated example, the non-percolating baffles 17 include inwardly outwardly a liquid-permeable nonwoven web 16, a polyethylene film 19, and a band-shaped resilient element 20. A non-leaking partition 17 arranged on the back of the diaper is also provided with adhesive fasteners 7 for sealing the diaper.

In the embodiment shown in Figures 12 to 15, in which like elements have the same reference numerals, the diaper consists of a sheath formed by an outer film 7 which is impervious to liquids and is made, for example, of polyethylene, the longitudinal edges of which are 6 to 11 folded into Z, which has, as before, parts 1 a, 1b e 1 c. In this case, firing into Z creates a bath adapted to accommodate an insert composed, for example, of an absorbent pad 2 of rectangular shape and It is enclosed in a fabric 3 which is liquid pervious and is made, for example, of a nonwoven. The longitudinal elastic members 5 are in a tensioned state and fixed in parallel to each other on the edges of the impermeable outer film 6 to the folded portion 1c arranged substantially in the same plane as the inner face sheet of the absorbent pad 2 as seen in Figure 15. The baffles 5 have the same construction and are arranged in the same manner as in the embodiment of Figures 6 to 11, wherein the elastic element 10 ensures the opening of the baffles 5 so as to form non-slip pockets, as well as their return to their original shape.

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The casing is also provided at its front and rear end portions with transverse non-leakage partitions 17. These baffles 17 have the same construction and are arranged in the same manner as in the embodiment of Figures 6-11. bonding, sealing or some other suitable means. These non-leaking baffles 17 may consist of a composite material which, for example, comprises a liquid-permeable nonwoven web 18 and a impermeable polyethylene film 15, for example, sequentially inwardly to the outer edge.

In this illustrated example, no elastic band element is provided, although it can be attached.

Thus, the diaper is obtained in the form of a reusable sheath which can be easily fitted with a disposable absorbent element. This absorbent element may also be provided with self-adhesive type fasteners, not shown in the figure, to enhance its grip within the housing.

As in the previous embodiments, excellent transverse leak tightness, especially in the crotch region, as well as good longitudinal leak tightness in the tape region is obtained, and in addition this allows a significant reduction in production costs due to substantial savings in raw materials, especially polyethylene and nonwoven fabric. which is formed in the crotch region as compared to a conventional production method.

Claims (8)

Diaper panties for young children heavily exacerbate the type that includes the outer-foil, which is impermeable. For liquids, it has a generally elongated shape. It forms part of the rear part of the absorbent pad, also generally elongated from the shape ε of the placed non-impermeable film, which allows: 3 I oro kaaoínv 0C ± 3 tare overlaps internal permeable, and this assembly is designed so that on each side passage side of the diaper panties leaves p d of the feet, while near the side struts for ΟΚΓ 3j ú 2 2Cni Adhesive fastening means are provided ⁱⁿ the impermeable film portion, characterized in that the impermeable outer film (1) has substantially the same width along the entire length of the diaper panties, two lateral impermeable partitions formed of stripes being arranged along each length of the diaper panties. (3) of a material which is permeable or impermeable to liquids, provided with at least one elastic element (10) fixed in a tensioned state near their edge oriented towards the axis of the diaper panties, and the stripes are located inside the edge regions of the absorbent pad (2) and form so the side impermeable pockets, while to the outer foil / 1 /, which is impermeable to liquids, and / or to the inner foil / 3 /, which is permeable to liquids, are in the respective areas of the front and rear part said impermeable outer foil / 1 / fixed two transverse strips / 12, 17 /, which are impermeable to liquids so as to form leak-free pockets of tape, and these strips have dimensions greater than the width of the impermeable outer film (1), so that this assembly forms impermeable side passages for the legs to be properly advanced. Diaper panties according to claim 1, characterized in that the transverse strips, which are impermeable to liquids, comprise at least one softened transverse part (6, 20). Diaper panties according to Claim 1 or 2, characterized in that characterized in that the longitudinal edges of the impermeable film are folded into Z / 1a, 1b, 1c / on each side of the absorbent pad / 2 / and along the length of the diaper panties, the two side leaking partitions / 5 / being fixed from to the longitudinal edges of the impermeable film not folded by the part / 1c / located substantially in the same plane as the inner front surface of the absorbent pad / 2 /. 4. Diaper panties according to any of the preceding claims At least in the region on each side of the absorbent one or more pins, characterized by the edges of the impermeable film (1), the foot passages (2) of them are fastened along the cushion (2) in the tensioned state of the working elastic members (5). Diaper panties according to one of the preceding claims, characterized in that the absorbent pad (2) is permanently fastened to the inner face of the impermeable outer foil (1) so as to be closed between the outer foil and the permeable inner foil (3). /. Diaper panties according to Claim 5, characterized in that the two side impermeable partitions (9) OF They are attached to the inner front side of the permeable film near the longitudinal edges of the absorbent pad / 2 /. Diaper panties according to claim 5, characterized in that two lateral impermeable partitions (15) are fixed in their central zone (15), each ^of their free edges having an elastic element to form two double impermeable pockets in the vicinity. those of each longitudinal edge of the absorbent pad / 2 /. Diaper panties according to one of Claims 5 to 7, characterized in that the longitudinal edges of the impermeable film have a cut-out (14) in order to improve the attachment to the body in the region of the side passages for the legs. Diaper briefs according to claim 3, characterized in that the absorbent pad (2) can be inserted in an interchangeable manner inside a permanent jacket formed by an impermeable outer foil, two side non-permeable partitions and two non-permeable transverse strips. Diaper panties according to any one of the preceding claims, characterized in that the adhesive fastening means (7) are fastened to a transverse strip located in the region of the rear part of the impermeable outer film. r_ - 77 >> Ct Γ ' ·· _ · O □ c n < - ¹ > v ^c —R O • •WITH c * x - 4 1 - > - i. - -— O _T r | _WITH - < LO t, _ _; __ '- ·