DE4004729C5 - Disposable sanitary napkin - Google Patents

Abstract

Disposable sanitary napkin, with
an absorbent element (3),
a liquid-permeable layer (1) on the body-facing top,
a liquid-impermeable layer (2) on the rear side facing away from the body and along longitudinal edges (9, 9 ') of the absorbent element (3) and side edges (4, 5) extending from the same, the elastic elements (6, 6') include,
marked by
at least one line (10, 11, 12a, 12b, 12c, 12d, 13a, 13b) held at least in the absorbent element (3) along and in the vicinity of each longitudinal edge (9, 9 ') of the absorbent element (3 ) on the body-facing side.

Description

The This invention relates to disposable sanitary napkins or pads according to the preamble of claim 1, which have a higher guarantee of tightness and in particular a more effective contact with the outer surfaces of the perineal region of a User, thereby reducing the risk of leakage on the sides of the product is reduced.

in the Purpose of the invention are sanitary napkins in particular absorbent Means outside of the female body to be used, generally during the menstrual period the monthly flow and to absorb other vaginal fluids and withhold.

disposable Sanitary napkins are designed in such a way that, after taking up the Liquids the female body, without being used again, thrown away.

Sanitary napkins are articles of general consumption in modern society and may, for example, be divided into three categories, namely:
tampons,
Sanitary napkins; and
Hybrid bandages that have the properties of the other two types.

tampons are deposits that take up the menstrual flow within the vagina can, without that Clothes of the user are soiled. They are considered the best Protective agent considered. In practice, malfunctions in their Application occur regarding their property, when taking of liquid radially expand so that the expansion of the tampon sealed the vaginal canal and closed will: besides There are women who for physical or psychological reasons no Use tampons as effective feminine protective measures. Finally, tampons introductory and cause removal problems; occasionally they are sticky and difficult to handle, and subject to health reasons their use in some cases medical restrictions.

The so-called hybrid bandages have properties of tampons and externally to use sanitary napkins on. Occasionally they become deposits, Labial pillows or atrial inserts called, with a partial or complete introduction done in the vaginal vestibule.

In many of the cases described in the literature become the anatomical interaction the insert with the body not considered by the user, inasmuch as the sensitive skin tissue is often obstructive Geometry of certain structural elements to be extended, d. h., the so-called labial cushions rub on very sensitive urogenital areas, like the vaginal opening, the urethral opening and / or the clitoris. In other cases is it necessary that one Bandage with an area that lies within the vaginal vestibule, firmly attached to the intimate clothing of the user, and in most cases does this to a rubbing action within this sensitive area.

Thus, according to the US 3,905,372 an element within the vaginal opening is physically bound to an outer portion such that the relative movements between the user's body and the underlying structure of the insert cause discomfort, irritation and even pain. Similarly, US-A 3,983,873 describes tabs which abut against the walls of the labial space to increase the tying forces of the napkin. There are other atrial inserts designed to eliminate irritant factors through the relative movements of the user's body and product and clothing; however, this product is extremely demanding and expensive to manufacture:
Further, outside-of-the-body bandages have been developed near the vulva area to record monthly flow, other vaginal fluids and possibly urine in incontinent women.

In their simplest and most common Form, these inserts or binding an absorbent core between a liquid-permeable layer or foil on the front (sometimes referred to as "upper layer") and a liquid-impermeable backing layer on.

Of the absorbent core, sometimes referred to herein as an "absorbent element" designed so that he the monthly flow and other vaginal fluids absorbs and absorbs. The absorbent core can be crushed Pulp fibers, polymer foams, plant pulp, natural or synthetic Contain fibers or another material that the monthly flows or other body fluids can absorb. In general, pulp fibers become the main constituent the absorbent core from the outside used bandages.

The liquid pervious topsheet is applied to the user's body when the napkin is in use, allowing the flow of the month or other vaginal fluids through so that they can be absorbed by the underlying absorbent core. This topsheet is generally a liquid pervious nonwoven fabric or a perforated plastic film. Although the topsheet may be hydrophilic, it is preferably hydrophobic. In this case, the monthly flow or other fluids pass through the fluid pervious topsheet, but the topsheet, because it is hydrophobic, feels dry, which makes the product more comfortable to use. The perforated plastic films are generally hydrophobic per se. Nonwoven fabrics, if not of hydrophobic fibers, can be rendered hydrophobic by treatment with, for example, a water repellent finish such as fluorine-containing chemicals or wax emulsions.

The liquid-impermeable backing layer prevents that the liquid absorbed by the absorbent core from the hygienic Binde flows out and the clothing of the user is dirty. The backsheet is generally a thin one Plastic film, such as polyethylene, although in some cases, too may be made of other material, such as a non-woven A substance which has been treated to be liquid impermeable. If necessary, the back can for water vapor permeable be, d. H. It can pass water vapor and at the same time be impermeable to liquids.

The Expire, and most often is generally the expiration of monthly blood on the sides, is even in very small quantities for the user very uncomfortable and embarrassing. That's why it was at the Development of such products the goal of the expert, the liquid flow in the direction Z to maximize (taking into account will that in a three-dimensional representation of the axes X and Y the horizontal Plane and the axis Z directed perpendicular to this plane is). Except the technical reasons, that justify this goal, there are psychological reasons for the goal, that one faster Drain in Z direction the discoloration minimized on the bandage and, together with a relatively dry Upper class, the sense of security raised and which is due to a failure of the bandage, for example due to leakage, caused embarrassment is diminished.

The conventional Bandage is a very ordinary, longish, rectangular product, that without regard has been prepared on the anatomy of the user. That is, at The application can deform this product, reducing the absorption capacity considerably diminished and the occurrence of leakage favored.

• – die absorbierenden Schichten sind anatomischer als ein Rechteck, beispielsweise in Form einer Sanduhr, hergestellt;
• – die Binde als Ganzes erhielt eine Muschelform, um einen besseren Sitz zwischen den Beinen der Benutzerin näher an ihrem Perinealbereich zu erreichen;
• – es wurden Oberschichten verwendet, die den Durchfluß der Flüssigkeit zum absorbierenden Element optimieren und ihren Rückfluß in die entgegengesetzte Richtung verhindern;
• – es wurden kompliziertere Strukturen entwickelt, beispielsweise ein absorbierendes Element, das in seinem Mittelbereich dicker ist, um die Abflußstelle und die Binde einander näher zu bringen, Seitenlappen, die Abflußsperren bilden oder überlappende Strukturen, wie beispielsweise in US-A 4,425 130 beschrieben.
• – die Absorptionsfähigkeit wurde erhöht, beispiels weise durch Verwendung entweder von absorbierenden Fasern oder superabsorbierenden Polymeren, durch Verändern der Dichte innerhalb und entlang der herkömmlichen absorbierenden Schicht oder durch Verwendung von Schichten aus unterschiedlichen Materialien, usw.

From this product, many improvements have been made that directly or indirectly increased the tightness:

• The absorbent layers are made more anatomically than a rectangle, for example in the form of an hourglass;
• - The bandage as a whole received a shell shape to achieve a better fit between the user's legs closer to their perineal area;
• Upper layers have been used which optimize the flow of the liquid to the absorbent element and prevent its reflux in the opposite direction;
• More complicated structures have been developed, for example an absorbent element which is thicker in its central region to bring the drainage site and the napkin closer together, side flaps forming drainage barriers or overlapping structures as described, for example, in US-A 4,425,130.
• The absorption capacity has been increased, for example by using either absorbent fibers or superabsorbent polymers, by varying the density within and along the conventional absorbent layer or by using layers of different materials, etc.

Out This list of improvements shows that the optimization the product of this increasingly complicated, demanding and expensive in terms of the benefits achieved, which in turn is the price for the Increased end consumers.

at the investigation of the reasons for the occurrence from leakage at sanitary napkins it was found that the way of the vaginal discharge to the point where it interacts with the product, the such liquids receives and holds back, meets, preferably must be kept short. This is also shown by the fact that everyone Keep it away from the liquid allows more or less over the drainage point to flow adjacent skin, in turn, for example, on the viscosity and the surface tension such a liquid depends. In some cases can the liquid even outside the range of the absorbent layer drain and so discomfort, embarrassment and the feeling of uncertainty for mean the user. Leading to the conclusion, that one Structure with an excellent efficiency, what absorption and Fluid retention capacity can only be achieved from the moment in which the liquid comes into contact with such a structure and not before.

A generic, disposable sanitary napkin is, for example, from the EP 0 238 053 A2 known. In this case, between an absorbent element and non-absorbent, elastic side edges is an interrupted weld line with the possibility of forming liquid channels in contact with the absorbent material so that in use, in the crotch area of a user, no excessive amount of liquid accumulates due to the existence of a continuous, absorption-inhibiting weld line. To adapt the known sanitary napkin to the anatomy of a user, the stacking of layers of different dimensions is also proposed.

In the DE 37 18 076 A1 a sanitary napkin is described in which to avoid lateral leakage in addition to an absorbent element Absie-generating reinforcing member is provided which at least partially overlaps the absorbent member and elastic side edges and comprises two Verschweißungslinien in the region of the elastic side edges. The weld lines are formed interrupted along the contour of the absorbent element, so that a liquid flow into the absorbent element is possible.

To avoid a lateral leak in the EP 0 155 515 A1 proposed a sanitary napkin in which liquid in the region of the longitudinal center line of the sanitary napkin to avoid accumulation of direct contact of the sanitary napkin with the Perinealbereich a user is to accumulate.

The sanitary napkin according to EP 0 091 412 A2 is constructed so that liquid accumulates along an absorbent member bounded by elastic side edges, and then gradually flows into the absorbent member.

The US 4,701,177 discloses a sanitary napkin in which the absorbent element is completely bounded by a splice line.

Compaction lines in absorbent materials are known for a variety of purposes and in various geometries in the art, such as from US 3,575,174 . US 4,701,177 . DT 27 21 816 A1 . US 4,655,759 . EP 0 249 405 A2 and EP 0 136 524 A1 ,

It Object of the present invention, the genus in modern, disposable Sanitary napkin to develop such that they have the disadvantages of the prior art technology overcomes and in particular the risk of accumulation of liquid and thus effectively reduces leaks on the pages as well automatically adapts to the anatomy of a user, without new materials and complicated as well as sophisticated structures, which are difficult to manufacture, to use, simple and effective is and a cheap one Cost-effectiveness having.

The Invention solves this object by a disposable sanitary napkin according to claim 1.

The under claims 2 to 12 describe preferred embodiments of the invention.

The Function of the bandage according to the invention is based on the fact that at Use of the product be midrange through the thighs of the User is compressed. This compacting makes the material between the two lines to the body the user pressed down, making more material for the absorption at the point of discharge to disposal that is, where the absorption requirement is greatest. In this way, a free flow of the liquid with the possibility of over the Skin escape, prevents and thus reduces the risk of leakage.

are the two lines, as in the prior art, does not exist, so the absorbent material may be under thigh pressure the user of the body move away or a random one Accept configuration that does not have better contact at the discharge point brings.

D. h., that, unlike traditional bandages, the disposable sanitary napkin according to the invention a protuberance of the absorbent material allows to contact with the body of User to optimize without additional absorbent material For this Purpose must be used.

Of the as used herein, "compaction line" or "by compaction obtained line "means that the body the sanitary napkin subjected to such pressure along a line will that on inelastic way a higher one Density is obtained as the surrounding material. Such lines - it must at least two of them can be present - just now or not being straight and parallel to each other and to the longitudinal edges, they too can have any depth. Preferably, the lines are parallel to the longitudinal edges, their Width is less than 5 mm, because in this way they favor the formation of the protuberance, when the product is put into use.

A line obtained by high densification is preferred over a line achieved by low densification, because it favors the ability of the absorbent layer to form the protuberance toward the user's body under the pressure of the thighs. However, compression above some level has the disadvantage of creating a line of hard material which, in turn, may be uncomfortable for the user. A single compaction line along each longitudinal edge is preferred. But they are also suitable two or more adjacent lines along each longitudinal edge or other configurations that do not adversely affect the formation of the protuberance during use of the product.

Of the Term "longitudinal edge" refers to the margins along the absorbent material of the napkin of the invention. This term does not refer to the longitudinal edges along the product, the may also have side lobes, the over the protrude absorbent element out.

Of the Expression "along or nearby each longitudinal edge "means that the distance from a line obtained by compaction to the nearest longitudinal edge is less than the distance between this one line and the other line obtained by compaction on the opposite Longitudinal edge. Because the densification lines are more preferred because of their greater density liquid line are, they are not the longitudinal edges so close that one Leakage hazard occurs, but not so close to each other that the education the above protuberance is prevented. Preferably, the distance of a compression line to nearest longitudinal edge 5 to 30%, in particular 15 to 20% of the width of the absorbent element.

Of the Distance between the compression lines also depends on the material (s) from which form the absorbent material and the example different elasticity, Density or fiber length can have. A specific property of the densification lines is that they are preferred drain paths for liquids represent, and therefore lead the leaked liquid in areas or suck it wickedly, further away from the drainage point are, d. h., they distribute the liquid more homogeneously and faster over the whole absorbent element so that less time is available to the fluid, to come into contact with the skin of the user, and a leak is avoided that would occur if much menstrual fluid in a single place without compression lines for lighter Distribution drains off.

at some practical embodiments of conventional Sanitary napkins are elastic means in combination with side lobes along the product and a wadding layer of pulp fibers as absorbent element used. It should be noted that a certain Densification of the absorbent element during storage of the product occurs. These elastic means give the product anatomical curvatures and wrinkles, and elasticity allows the pulp fibers this one, prefers near the anatomical curvatures and to embed folds so that they undesirable Areas higher Density and consequently lower absorption rate, usually at the Give way to the menstrual drain. The compression lines give the cellulose wadding cohesion and therefore resilience across from elastic movements of their fibers favorable for the product Bodies, e.g. B. along the longitudinal edges, where they the leaked liquid lead to more remote areas of the absorbent element and the above protuberance when using the bandage can.

Under The "body" of the bandage is here to understand that this at least the absorbent element and optionally also may consist of other layers, for. B. the upper class and the Backsheet the on, under or in the body are arranged. The compression lines can thus possibly only in the absorbent element or in any other structural element, that the body the bandage contains, hineingepreßt become. For example, you can the densification lines in both the topsheet and the absorbent Element are produced.

The preferred method for producing the compression lines is in that on the absorbent body a relief pattern of a corresponding material and the desired Form applied and pressed will, so that Material of the absorbent element is sufficiently embossed, if necessary by Hot pressing to create compression lines. The with the relief pattern in touch brought surface the absorbent element is the side facing the user's body; in the other case leads the pressure exerted by the thighs of the user for unfavorable formation the protuberance on the side of the absorbent element that faces away from the body.

One example for a large-scale Production of the bandage according to the invention is a number of the same on the circumference of a rotary cylinder Relief pattern and the forming the absorbent element Cotton between this cylinder and a conveyor under sufficient pressure perform, to make the compression lines on the cotton wool.

• – flüssigkeitsdurchlässige Deckschichten aus einem nicht gewebten Stoff oder perforierten Kunststoffolien, mit oder ohne Prägung, allein oder in Kombination mit anderen Materialien, mit entweder hydrophoben oder hydrophilen oder anderen Eigenschaften,
• – eine einschichtige oder mehrschichtige Lage aus Holz- oder anderem Pflanzenzellstoff, Polymer- oder natürlichem Schaumstoff, hydrophoben Fasern, entweder allein oder miteinander vermischt, die superabsorbierende Polymere mit Bereichen unterschiedlicher Dichte aufweisen,
• – gegebenenfalls Mittel zum Befestigen der Binde an der Bekleidung der Benutzerin,
• – eine äußere Rückschicht aus entweder ganz oder teilweise hydrophobem Material oder Materialien, atmungsaktiv oder nicht, als Einzel- oder Mehrfachschicht,
• – gegebenenfalls elastische Mittel,
• – in rechteckiger Form, in Form einer Sanduhr oder jeder anderen entsprechenden Form.

The disposable sanitary napkin according to the invention is not limited to a specific type of structure and may have the following features:

• Liquid-permeable cover layers of a non-woven fabric or perforated plastic films, with or without embossing, alone or in combination with other materials, having either hydrophobic or hydrophilic or other properties,
• A single-layered or multi-layered layer from wood or other vegetable pulp, polymer or natural foam, hydrophobic fibers, either alone or mixed together, having superabsorbent polymers with regions of different density,
• Optionally means for attaching the bandage to the clothing of the user,
• An outer backing layer of either totally or partially hydrophobic material or materials, breathable or not, as a single or multiple layer,
• - optionally elastic means,
• - in rectangular form, in the form of an hourglass or any other appropriate shape.

The Compaction lines need close to the longitudinal edges of the Area, which should and should take up the monthly flow a length of preferably 1 to 12 cm and in particular 2 to 8 cm.

at a preferred embodiment According to the invention, the compression lines are not only along the longitudinal edges, but extend in a complementary way in the areas that do not directly record the monthly flow, but rather, a leading one to each other Direction until they meet and in both directions be continued. This results in a faster and more homogeneous distribution of the absorbent Element collected liquid optimized.

The However, the invention also relates to embodiments in which do not hit the compression lines or are divided radially, or also embodiments, the collected liquid distribute without the ability a protuberance between the compression lines under the thigh pressure of the To make a user adversely affect.

The Invention is described below with reference to the schematic drawing of a embodiment a disposable sanitary napkin explained in more detail. Show it:

1a a top view of the product before the thermocontraction of the elastic means used,

1b a schematic cross section along the line II of 1a .

2a a perspective view of the napkin in 1 after thermocontraction of the elastic means used,

2 B a schematic cross section along the line II-II in 2a .

3 a schematic cross section of the form, the bandage of the 1 occupy when used, and

4 a schematic representation of other arrangements of the compression lines, which can be used in other embodiments of the invention.

In the drawing is an externally applicable sanitary napkin 30 elongated shape with rounded upper and lower ends 16 respectively. 17 shown. It consists of a liquid-permeable upper layer 1 , an absorbent element or absorbent core 3 and a liquid-impermeable backing layer 2 , The bandage 30 also contains a pair of elastic elements 6 . 6 ' , which are at the longitudinally extending side edges 18 respectively. 19 the bandage are located. The bandage 30 has compression lines (compression lines) 10 . 11 . 12a . 12b . 12c . 12d . 13a and 13b on, which are explained in more detail below. Out 1b is z. B. it can be seen that the upper layer 1 and the backsheet 2 extend over the same width. The layers 1 and 2 are the same length. In contrast, the length of the absorbent element 3 less than the length of the top and back layers, and their width less than the width of the top and back layers. The absorbent element 3 has a pair of longitudinally extending side edges 9 . 9 ' , a rounded upper edge 21 and a rounded bottom edge 22 which together form the circumference of the absorbent element. The absorbent element is located between the topsheet 1 and the backsheet 2 , like out 1b best seen. The upper class 1 and the backsheet 2 be at the edge parts with each other z. B. by heat-sealing, ie at those parts, between the periphery of the absorbent element 3 and the circumference of the bandage 30 lie by the mentioned upper edge 16 , the bottom edge 17 and the two longitudinal side edges 18 and 19 is defined. As a result of the layers fastened together in the manner indicated 1 and 2 arise longitudinally extending side lobes 4 . 5 in the bandage 30 ,

Between the upper class 1 and the backsheet 2 there are elastic elements 6 . 6 ' in the side lobes 4 . 5 the bandage 30 , These elastic elements are in a stretched, but elastically contractible state when the bandage 30 , as in 1a , spread flat. As the elastic members contract from their stretched condition, the napkin assumes a "boat-like" shape 2a one. The elastic elements may be one or more rubber monofilaments, for example, by means of a hot melt adhesive between the top layer and the back layer according to 1b are attached. Preferably, however, a strip egg A thermoplastic film which contracts and becomes elastic after heat treatment is used as the elastic member. Various heat shrinkable thermoplastic films which have elastic properties after heat shrinkage are known. Preferably, in accordance with the present invention, strips of a heat shrinkable ethylene and vinyl acetate copolymer having a basis weight of about 35 g / cm ² , a length of about 13 cm, a width of about 1 cm and a thickness of about 30 μm are used.

The elastic elements preferably have a length which is about 60% of the napkin 30 is, and are centered from one end to the other of the bandage. The indicated heat-shrinkable copolymer strips are secured in their relaxed state between the topsheets and backsheets using a heat seal assembly, thereby forming a series of spaced, transversely oriented attachment lines 7 arises ( 1a ). The attachment lines 7 are separated from each other by areas 8th separated, in which no seal is present. Become the heat shrinkable elastic elements 6 between the topsheet and the backsheet secured by the above-mentioned heat-sealing, the elements are pulled 6 . 6 ' under the action of applied heat together and thereby obtain their elastic properties. Become the heat shrinkable elastic elements 6 . 6 ' For example, attached with an adhesive, the elements must then be treated with heat, eg. B. hot air, so that they contract and get their elastic properties. Are the elastic elements 6 . 6 ' in the contracted state, takes the bandage 30 the anatomical, scallop-shaped configuration according to 2a and 2 B at. The side lobes 4 . 5 and their adjacent areas of the bandage are lifted up, like 2 B shows, so that the lobes an angle of about 30 ° with the horizontal plane 36 the bandage 30 in the spread state according to 1b form.

The liquid-permeable upper layer preferably exists 1 made of a non-woven fabric made of heat-sealable polyester fibers with a basis weight of 22 g / m with 144 perforations per 6.45 cm ² . The liquid-impermeable layer 2 preferably consists of a polyethylene film having a basis weight of 19 g / cm ² and a thickness of about 0.020 mm. Consists of the upper class 1 made of heat-sealable polyester fibers and the backing layer 2 made of polyethylene, so the top layer and the back layer can be sealed at their edge parts by heat. In a preferred embodiment, the absorbent element is 3 from a layer of 100% cellulose wool fluff weighing about 7 g. For a typical sanitary napkin, the absorbent element is 3 about 20 cm long and about 6 cm wide. The absorbent element 3 is located in a known manner between the liquid-permeable upper layer 1 and the liquid impermeable backing layer 2 ,

In one embodiment of the invention, the sanitary napkin 30 a first pair of compression lines 10 . 11 on, which are parallel to the longitudinally extending side edges 9 . 9 ' of the absorbent element 3 run. For a sanitary napkin 30 with a length of 22 cm are compression lines 10 . 11 about 6 cm long (between points A and B and A 'and B' in 1a ) and slightly inwards at a distance (about 0.8 cm) from the longitudinal side edges 9 . 9 ' of the absorbent element 3 arranged. The compression lines 10 . 11 are located substantially midway between the upper and lower edges of the napkin.

In a second and more preferred embodiment of the invention, the sanitary napkin 30 four more compaction lines. As 1a shows, a pair of compression lines runs at an angle from the ends of each compression line 10 . 11 to points (C and C 'in 1a ), which are on the longitudinal center line 33 the sanitary napkin 30 lie. So runs at the top of the bandage 30 a third compression line 12a from the upper end A 'of the first compression line 10 to a first point C on the midline 33 between the end A and the top edge 16 the bandage.

Accordingly, a fourth compression line extends 12b from the upper end A of the second compression line 11 to the first point C. A second pair of angled compression lines 12c and 12d is located near the lower part of the sanitary napkin. A fifth compression line 12c extends from the lower end B 'of the first compression line 10 to a second point C 'on the midline 33 between the end B 'and the bottom edge 17 the bandage 30 , A sixth compression line 12d extends from the lower end B of the second compression line 11 to the second point C 'on the center line 33 ,

Are the compression lines 10 . 11 . 12a . 12b . 12c and 12d arranged in the manner just described, they form an elongated hexagonal configuration, such as 1a shows.

Out 1a is also apparent that the first compression line 10 and the second compression line 11 parallel to each other and to the side edges 9 . 9 ' of the absorbent element 3 run. In a typical sanitary napkin 30 with a length of about 22 cm and a width of about 8 cm, which is an absorbent element 3 having a length of about 20 cm and a width of about 6 cm, the compaction lines 10 and 1 a length of about 6 cm and a width of about 0.15 cm. Conveniently, have the compression lines 10 and 11 a distance of about 4 cm.

In another embodiment of the invention, the sanitary napkin has another pair of densification lines along the longitudinal centerline 33 on. Out 1a It can be seen that a seventh compression line 13a from point C to point D on the longitudinal centerline 33 towards the upper end of the sanitary napkin runs. Accordingly, an eighth compression line runs 13b from point C 'to point D' on the longitudinal centerline 33 toward the lower end of the sanitary napkin. Have the bandage 30 and the compression lines 10 . 11 . 12a . 12b . 12c and 12d the typical specified lengths, so are the compaction lines 13a and 13b suitably 1.5 cm long. It will be apparent to those skilled in the art that the various dimensions given herein for the napkin 30 , the absorbent element 3 and the various compaction lines are only examples and that these dimensions can be changed.

to Formation of the compression lines can be a steel plate with ribs, the desired one Compression line pattern correspond to be used. So can for example, the absorbent element on a fixed area placed and then covered with the steel plate so that their ribs come into contact with the top of the absorbent element. The steel plate is then pressed against the absorbent element, wherein a hydraulic press (Norgren) with a pressure of 630 mbar is used to form the compaction lines.

3 shows the bandage of the 2 in use, introduced into the perineal area 40 the user. Under the pressure of the thighs 12 and 13 the user forms the protuberance 14 between the compression lines 10 and 11 , The side lobes 4 and 5 lie against the thighs of the user and thus effectively prevent lateral leakage.

4 shows three examples of compaction lines arranged according to the invention. In 4 a the compression lines do not meet; in 4 b, the compression lines meet and diverge radially to the outermost areas of the napkin; in 4 c, two compaction lines are arranged along each longitudinal edge.

The sanitary napkin according to the invention 2 was studied in a group of 17 women.

each Woman received 7 bandage according to the invention, d. H. with compression lines (hereinafter referred to as group A bindings) and 7 other bandages corresponding to these bandages, but without the compaction lines (hereinafter referred to as group B bindings).

each Woman wore the bandages while menstruation, alternating the bandages of group A and B. used. Each bandage was used for an average of four hours.

• – 40% mehr Binden der Gruppe A als der Gruppe B wiesen die Bildung der Ausstülpung in der Mitte auf, wodurch bewiesen ist, daß die Verwendung von Verdichtungslinien zu der Bildung dieser Ausstülpung führt.
• – 5% weniger Binden der Gruppe A als der Gruppe B zeigten Zeichen von Undichtheit an den Seiten, woraus ersichtlich ist, daß die Ausstülpung gemäß der Erfindung in der Nähe der Ausflußstelle eine Undichtheit verhindern hilft.

After use, each bandage was examined for the formation of the protuberance in the middle and the occurrence of leakage on the sides. The following results were obtained:

• 40% more bandages of group A than group B showed the formation of the protuberance in the middle, proving that the use of densification lines leads to the formation of this protuberance.
• - 5% less bandages of group A than group B showed signs of leakage on the sides, from which it can be seen that the protuberance according to the invention helps prevent leakage in the vicinity of the point of discharge.

Claims (12)

Disposable sanitary napkin, with an absorbent element ( 3 ), a liquid-permeable layer ( 1 ) on the body-facing top, a liquid-impermeable layer ( 2 ) on the rear side facing away from the body and along longitudinal edges ( 9 . 9 ' ) of the absorbent element ( 3 ) and side edges extending from the same 4 . 5 ), the elastic elements ( 6 . 6 ' ), characterized by at least one at least in the absorbent element ( 3 ) by compression line ( 10 . 11 . 12a . 12b . 12c . 12d . 13a . 13b ) along and near each longitudinal edge ( 9 . 9 ' ) of the absorbent element ( 3 ) on the body-facing side. Sanitary napkin according to claim 1, characterized that the Compaction line is 1 to 12 cm long. Sanitary napkin according to claim 2, characterized that the Compression line is 2 to 8 cm long. Sanitary napkin according to one of claims 1 to 3, characterized that the Compaction line is 1.5 to 5 mm wide. Sanitary napkin according to one of claims 1 to 4, characterized in that the compression line is parallel to the longitudinal edges ( 9 . 9 ' ) of the absorbie element ( 3 ) runs. Sanitary napkin according to one of claims 1 to 5, characterized that more Compression lines are parallel to each other. Sanitary napkin according to one of Claims 1 to 6, characterized in that the compression line (s) enter the absorbent element (11). 3 ) is (are) pressed. Sanitary napkin according to one of Claims 1 to 6, characterized in that the compression line (s) enter the absorbent element (11). 3 ) and the permeable upper layer is (are) pressed. Sanitary napkin according to one of Claims 1 to 8, characterized that the Compression line (s) is pressed into the binding structure forming (are). Sanitary napkin according to one of claims 1 to 9, characterized that the Compaction lines (A B, A 'B') under mutual approach not into the menstrual flow extend directly receiving areas until they meet (C, C ') and there extend a little further in both directions (D, D '). Sanitary napkin according to one of claims 1 to 10, characterized in that the distance between the compression line and the nearest longitudinal edge ( 9 . 9 ' ) 5 to 30% of the width of the absorbent element ( 3 ) is. Sanitary napkin according to one of claims 1 to 11, characterized in that the distance between the compression line and the nearest longitudinal edge 5 to 20% of the width of the absorbent element ( 3 ) is.