MX2008006367A - Absorbent product - Google Patents

Abstract

The invention refers to an absorbent product chosen from an incontinence protection, a sanitary napkin and a panty liner, comprising a liquid permeable apertured top sheet facing the wearer during use, and a liquid-impermeable back sheet facing away from the wearer during use, whereby longitudinally extending textile-like edges are positioned on both longitudinal sides of the top sheet whereby the textile-like edges comprise apertures. Hereby, the textile-like edges will amongst others have the capacity to transport moisture that is formed at the interface between the textile-like edges and the wearer skin. Further, the apertures will allow a certain acquisition, i.e. liquid can be transported to the absorbent structure of the product.

Description

ABSORBENT PRODUCT Technical field The invention relates to an absorbent product, especially an incontinence protector, a sanitary napkin and a pantiprotector containing a surface sheet with liquid-permeable orifices facing the user, a backing sheet impervious to liquids in the opposite direction to the user and an absorbent structure positioned between the topsheet and the backsheet, and optionally a liquid distribution layer between the topsheet and the absorbent structure, wherein the topsheet and backsheet are sealed together at the periphery of the backsheet. product thereby forming a seal at the edge, and whereby the longitudinally extending textile-like edges are placed on both longitudinal sides of the top sheet.

Technical background A problem that often occurs with traditional absorbent products is that the external longitudinal parts of the product may rub against the user's skin, for example on the upper inner side of the thighs. This causes discomfort for the user. To avoid this problem it is known to cover the longitudinal edges of the upper sheet with a soft material, such as a nonwoven, see for example, WO 93/09744, W093 / 12745, EP-A-1016396 and EP-A-523683 . Soft longitudinal edges are sometimes referred to as "textile edges" or "textile type edges".

Since the textile edges will cover parts of the upper sheet, these need to have some characteristics so that the properties of the product do not change negatively. In addition, textile edges can add properties to the product if desired.

The main property of the textile edges is that they are soft to the skin, in this way, they have to be composed of a soft material. Many times, a non-woven material is used. In addition, since the textile edges cover portions of the upper sheet, the textile edges may have the advantage of preventing rewetting of the upper sheet after the absorption of liquids. To provide this advantage, it is important that the textile edges do not allow liquids to flow from their inner side towards the front side to user. In addition, since the absorbent structure of an absorbent product often contains SAP granules having a small size, the textile edges can prevent the SAP granules from leaving the product. Still further, it is desired that the textile edges have the ability to fit hermetically to the wearer's body. This can be achieved as a result of a careful choice of material.

To achieve the desired effects described above many times a conventional non-perforated textile edge based on a soft material is used (see, for example, EP-A-523683). However, with this some disadvantages and problems arise. To begin with, it is difficult to use the capacity of the entire absorbent structure, since the liquid is only left in the product in the central part of the product (ie, the part not covered by the longitudinally extending textile edges). With this, the absorbent structure needs to be oversized or have additional capacity in relation to the size of the product, or it is necessary to provide more efficient means for the acquisition of the absorbed liquid. This is especially a problem when you want to provide a small product, that is, a product that due to its size Small be economic with respect to the use of the material, comfortable for the user and manageable for the user.

Another problem with a conventional textile edge is that it normally fits tightly with the wearer's skin. Therefore, any moisture that forms between the textile edge and the wearer's skin will not be removed.

Thus, the result will be discomfort for the user.

The object of the invention is to provide an absorbent product having textile edges, where the problems presented above are solved.

Compendium of the invention This objective is achieved by an absorbent product according to claim 1, wherein the textile-like edges contain holes. With this, the textile type edges will have the ability to transport moisture that is formed at the interface between the textile type edges and the user's skin. In addition, the openings or holes will allow a certain acquisition, that is, the liquid can be transported to the absorbent structure of the product.

In a preferred embodiment, the ratio in diameter of the holes of the upper sheet and the diameter of the holes of the textile-like edges is at least 1, preferably at least 2. Thus, the holes of the textile-like edges are Small enough to not allow the SAP granules to leave the product. In still another preferred embodiment, the ratio between the open area of the upper sheet and the open area of the textile type edges is at least 2. With this, the liquid transport capacity is concentrated in the area where it is most needed, that is, in the central part of the upper sheet. Moreover, it is also preferred that the material of the upper sheet contains perforations, which are placed between the holes of the upper sheet, having a diameter in the range of 0.05 to 1 mm, preferably in the range of 0.1 to 0.4 mm.

In still another preferred embodiment, a liquid distribution layer is provided between the topsheet and the absorbent structure, wherein the liquid distribution layer in a preferred variant is in the form of a very thick and fluffy layer, thereby the liquid distribution layer extends to the periphery of the product so that it forms part of the seal at the edge. With this, the edges of the product are they will become rigid, which can contribute to the comfort of the user and the function of the product. Also, the liquid that has been transported through the top sheet can be distributed towards the sides of the product so that a larger part of the absorbent structure comes into direct contact with the liquid; that is, a larger part of the absorbent capacity is used. Also, the risk of SAP granules leaving the product is further reduced. Still further, by having the material of the liquid distribution layer in the edge seal, another sealing means may be involved, such as ultrasonic welding, since the material of the liquid distribution layer may comprise fibers. that can be soldered; for example, a very thick and spongy layer containing synthetic fibers that are weldable. With this, the resistance of the seal can be made stronger. Another advantage may be that the welding pattern on the surface of the textile edges or the top sheet becomes lighter.

Thus, in another embodiment the sealing of the edges is at least partially formed by spot welding, such as welding by ultrasonic points. With this, a better contact between the material of the upper sheet and the absorbent structure is achieved, since the welding also includes the step of mechanically compressing the material of the welding points (see Figure 1 for a main drawing comparing the traditional solution with a solution of the present invention). Compression of the material can also be obtained by some other sealing method that consists of mechanical compression, but if the material is sealed, for example, by an adhesive (without mechanical compression), the material can be attached very loosely to provide good contact between the upper sheet material and the absorbent structure. As a result of a better contact between the upper sheet material and the absorbent structure a more efficient absorption is achieved. Especially, it is desired that the ratio between the thickness of the central part of the product (T) and the thickness of the seal at the edge (t) be at least 3. Therefore, a good contact between the absorbent structure and the material of the upper sheet. In addition, by using a roll material (instead of a mat-formed material) for the liquid distribution layer or for the absorbent core which may be inherently compressed (since it is usually in the form of a roll) in addition compression can be achieved and with it better contact.

Accordingly, the absorbent product according to the invention will have a central part (seen from the front of the product) consisting of the absorbent core + liquid distribution layer + top sheet that rises compared to the side edges of the product . To provide an entry of liquids at the edges that are as good as possible, the edge material (non-woven textile type edges) should have as good contact as possible with the raised center portion. According to the invention this is achieved by providing a stepped slope in the material near the upper edge of the raised central part. Thus, the fastening points of the lateral nonwoven should be placed as close to the lower edge of the raised central part as possible.

Furthermore, by using ultrasonic welding for the sealing of the edges, the soldering points will achieve a hydrophobic character. When using traditional welding, the entire edge will have a hydrophobic character (since a continuous welding seam is provided).

Therefore, the entry of liquids is not allowed through a traditional continuous welding seam and there is a risk of leakage if the user of the product has a discharge of important liquid from, for example, urine; that is, if the amount of liquid received is too large that the material of the top sheet and the textile edges can not absorb all the liquid. This is especially a problem if the product in question is small in size. This problem is reduced if only the small welding points are hydrophobic, since the area between the welding points will have the capacity to transport liquid.

Further, in a preferred embodiment, the product has a length that is in the range of from 13 to 22 cm, preferably shorter than 15 cm, and a lateral amplitude, in the less wide position, of the crotch portion, which is in the range of 4 to 6.5 cm, preferably less than 5 cm.

An important aspect of the invention is that the product of the invention has a high absorption capacity in relation to its size. To obtain this advantage, the product must show some properties.

For starters, liquid entry materials (top sheet + liquid distribution layer) should able to capture a relatively large volume of liquid. This is achieved by the use of a top sheet material having funnel-shaped three-dimensional holes and providing a bulky material, such as a thick, fluffy layer, below the top sheet. The three-dimensional structure of the perforated material together with the very thick and spongy layer gives a high free volume (hollow volume) that quickly captures the liquid. The funnel shaped holes will also "collect" the fluid initially so that it does not flow out of the surface. The film of the upper sheet material can also be pre-punched with small holes (also known as perforations), so that the liquid can also be taken partially between the large holes.

Second, the input materials must be able to maintain the liquid that has been taken by the product during use. This is achieved by using the film of the upper sheet material as a barrier against rewetting, that is, to make it difficult for the liquid to return to the wearer's skin. The SAP of the absorbent core also has, of course, an important contribution to keeping the liquid absorbed in the product. The three-dimensional structure of the upper sheet and the liquid distribution layer, preferably the very fluffy and thick layer, also make the distance between the user's skin and the core of the larger product so that the product is experienced as drier.

In addition, as a third point, the input materials need to provide a dry surface for user comfort. This is achieved by ultrasonically welding the upper sheet material and the liquid distribution layer, preferably the very thick and fluffy layer. With this, the material of the upper sheet + the liquid distribution layer can be properly drained.

In addition, as a fourth point, the entry materials should be soft and ventilated for the comfort of the user. This is achieved because the material for the textile edges is prepared in a soft nonwoven providing good comfort, and because it contains perforations to be "more ventilated" and to give a good entry of liquids.

Thus, the invention is also directed to an absorbent product wherein the product has at minus one of the following characteristics (according to the experimental results shown in the exemplary section): (i) an acquisition time for a first 5 mL inlet of synthetic urine that is below 6 s, preferably equal to or less than 5 s, and an acquisition time for a second 5 mL inlet of synthetic urine that is below 8 s, preferably equal to or below 4 s; (ii) a DORUP value (retention) for a 7 L dose of synthetic urine that is below 1 g, preferably below 0.5 g and more preferably equal to or below 0.2 g; or (iii) a Roth value (absorption capacity) of more than 45 g, preferably more than 55 g.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 describes a pantiprotector of the invention having an asymmetric shape containing the textile type edges with holes.

Figure 2 describes another pantiprotector of the invention containing textile type edges with holes.

Figure 3 shows different layers of an absorbent product of the invention.

Figure 4 is a main drawing comparing the traditional solution (61) with a solution of the present invention (60) with respect to contact between the topsheet and the absorbent structure.

Figure 5-7 shows experimental diagrams referring to the exemplary section of the invention.

Definitions By an "absorbent product" is meant a product such as an incontinence protector, a sanitary towel and a panty-protector.

"Open area" means the percentage of the surface of a material that is composed of perforations or holes.

By "longitudinal direction" or "machine direction" is meant the direction along the length of the absorbent product, i.e., from the back to the front of the product (or vice versa), and by "lateral direction" or "transverse direction" is understood as the direction from the lateral edge to the lateral edge of the product, that is, through the width of the product.

Detailed description of the invention Figure 1 and 2 describe absorbent products of the invention in the form of a pantiprotector (10) and a pad (30). As can be seen, the products are equipped with a top sheet with holes (11, 33). On the longitudinal edges of the upper sheet, textile-like edges (12, 32) are provided, the textile-like edges of which are provided with holes (15, 34). In addition, the textile type edges may be equipped with an engraved design, to add function or for design purposes. On the periphery of the product, the sealing on the edges can be observed (13, 31), which seals the different layers of the product. In a preferred embodiment, the sealing of the edges consists of a design of small solder points, for example, created by ultrasonic welding.

Returning to Figure 3, one can see a main drawing of the different layers of the product (50). Starting from the upper part (intended to be closer to the user's skin during use) the textile-like edges (51) can be observed, which are placed on the longitudinal edges of the upper sheet (52). The textile type edges can be fastened to the upper sheet by means of etching the textile type edges, by ultrasonic bonding, by the use of an adhesive, such as a hot melt adhesive or a combination of fastening means. An optional liquid distribution layer (53) can be placed below the top sheet. In a preferred embodiment, the liquid distribution layer is a very thick and fluffy layer. Below the liquid distribution layer, or directly below the upper sheet (in the case that the liquid distribution layer is not present), the absorbent structure (54) is placed. For example, the absorbent structure is an air-laid core bonded by pressure consisting of superabsorbent polymers. In a preferred embodiment, to provide a high absorption capacity, which is necessary for a small size product of this type, the absorbent structure contains approximately 50-60% SAP. A backsheet (55) is provided below the absorbent structure. For example, the backing sheet is a plastic film. Preferably, the plastic film is breathable. On the outside of the backing sheet is placed a release paper which is fastened to the backing sheet, for example, by rubber threads or by any other traditional means. A seal on the edge (56) joining the textile edges, for example by means of ultrasonic welding, the liquid distribution layer and the backing sheet at the longitudinal edges can also be observed. The reference number 57 refers to the funnel-shaped orifices according to a preferred embodiment.

Figure 4 shows the principles of the effect of the ultrasonic bonding of the invention. This drawing should only be interpreted as a schema. As can be seen from Figure 4 (whose figure should be interpreted for the main purposes) the solution according to the invention provides a more different contact between the topsheet and the absorbent structure. Therefore, the absorbent structure and the liquid distribution layer are well defined. In a traditional solution (61), the top sheet will not be as close to the absorbent structure and the liquid distribution layer as in the present invention, which will affect the absorption and rewet properties as described above.

The present invention is mainly directed to absorbent products such as an incontinence protector, a sanitary towel or a panty-protector.

Each product contains a back, a front part and a part of the crotch placed between them.

The product can be in the form of an hourglass (where the back and front have practically the same in the transverse direction and the crotch part is less wide than the front or back) or can have an asymmetrical shape or can have any other form that is appropriate for products of this type. By asymmetric it can be understood that the product is at least wide in the crotch part of the product (measured in the transverse direction) and is less broad in the front part than in the back part (measured in the widest part position) rear and front respectively in the transverse direction). For example, the width of the crotch portion of the product can be from 4-7 cm, especially from 4.5 to 5 cm, for example about 4.7 cm. The amplitude in the widest position of the front part can be from 5 to 8 cm, especially from 6-7 cm, for example around 6.5 cm. The amplitude of the widest position of the back part can be from 4.5 to 6.5 cm, especially from 5 to 6 cm, for example 5.3 cm.

In a preferred embodiment, the product of the invention is a pantiprotector having a length in the range of 13 to 22 cm, preferably of about 15.2 cm and an amplitude in the crotch part of the product in the range of a 4 to 6 cm, preferably around 4.7 cm. The top sheet material is a three-dimensional pre-perforated film that is equipped with more openings or holes, usually 7-9 holes per row. At the edges of the upper sheet a textile edge with holes is provided which is composed of nonwoven material. A very fluffy and thick layer is included as a liquid distribution layer. In addition, the absorbent core is provided in the form of a roll material containing approximately 40-60% SAP. The edges of the product including the liquid distribution layer are sealed by means of ultrasonic bonding. The product also contains a backup sheet, in the opposite direction to the user.

In another preferred embodiment, the invention relates to a pantiprotector containing a carded nonwoven as a material of the topsheet. At the edges of the top sheet a textile edge with holes is provided which is composed of non-material tissue. The liquid distribution layer is composed of a material placed in air and the absorbent core consists of pulp and SAP. The edges of the product including the liquid distribution layer are sealed by means of ultrasonic bonding. The product also contains a backup sheet, in the opposite direction to the user.

In still another preferred embodiment, the invention relates to a sanitary napkin that contains an upper sheet material with holes. At the edges of the upper sheet a textile edge with holes is provided which is composed of nonwoven material. In addition, the sanitary towel consists of a liquid distribution layer and an absorbent core. The edges of the product including the liquid distribution layer are sealed by means of ultrasonic bonding. The product also consists of a backup sheet, in the opposite direction to the user.

In still another preferred embodiment, the invention relates to a product against incontinence or incontinence protection consisting of a liquid-permeable upper sheet facing the user during use, optionally a liquid distribution layer. below the top sheet, an absorbent core and a backing sheet impervious to liquids in the opposite direction to the user. Typically, the absorbent core consists of a compressed laminated or mixed structure of cellulose fluff pulp and superabsorbent polymers, however, other materials or combinations of materials are completely possible as described below. Also, instead of being provided in a layer, the absorbent core may consist of two, or more, different layers.

The shape of the products of the invention can be in the form of an hourglass (ie, being less wide in the central part compared to the front and back, which are equally wide). Also, the products of the invention can have asymmetric shapes, whereby the product is less broad in the central part compared to the front and rear, and thus the rear part is less broad than the front. Other forms are also very possible for the products of the invention.

The textile-like edges are preferably made by a soft, skin-friendly material, such as non-woven, so that any rub against The user's skin is reduced as much as possible. By "soft" it is understood that the material is experienced as soft by the consumer. For example, the material of the textile type edges can be nonwoven carded. In addition, the textile type edges contain holes.

The holes of the textile edges can be made by mechanical perforation (for example a roller with hot or cold tips). Water jets or vacuum + heat or a combination of these techniques could also be used for drilling.

The textile edges may be made of nonwoven (fibrous) hydrophilic, thermoagglomerated, carded, polypropylene material. Also, it is possible to use a spin-bonded nonwoven, a nonwoven bonded through air, a spin-bonded non-woven (hydroentangled), a non-woven blown in the molten state or a combination thereof. If a combination is used, this may be a mixture of fibers of different polymers, but each fiber may also consist of different polymers (for example: PP / PE bicomponent fibers or PP / PE copolymer). The nonwoven of the textile edge may also include a percentage of natural fibers such as pulp or viscose. Nonwoven can be hydrophilic, hydrophilic or permanent hydrophobic. The nonwoven can have a basis weight of 7 to 50 g.

Also, the material on the textile edges can be a plastic film, made of PP, PE, PET, PLA, starch or any other thermoplastic polymer or a combination or copolymer of the aforementioned polymers.

The material can also be a laminate of a nonwoven and a film. Such a laminate can be prepared by bonding the nonwoven and the film using heat, using an adhesive or by mechanical bonding or by extruding the film onto the nonwoven, or a combination of these methods.

The textile edges preferably have an orifice size in the range from 0.8 to 1.2 mm, preferably from about 1 mm in the transverse direction (lateral direction) and in the range from 1.2 to 1.8 mm, preferably around 1.5 mm in the direction of the machine (longitudinal direction). However, the size of the holes can vary from about 0.2 to 6 mm in diameter.

The holes of the textile edges are usually oval in shape, slightly elongated in the machine direction. However, the holes may be round / circular and / or oval in the machine direction and transverse. The density of the holes in the textile edges will normally be in the range from 4-250 / cm2, preferably from 50-120 / cm2. In addition, the holes of the textile edges can be placed in one or more of a longitudinal or lateral row, or these can be placed in a longitudinally extending row. In addition, the holes can have different sizes and shapes. These can also be concentrated (zoned) to one or more areas of the textile edge, such as near the crotch area or the expected wetting point, so that the function of the holes is concentrated in the positions where it is especially desired. .

The open area of the textile edges is in the range from 2 to 50%, more preferably in the range from 5-20%.

The liquid-permeable top sheet is preferably made of a material that exhibits properties such as dryness and softness in the use of the absorbent product, since this sheet is against the body of the user. It is desired that the sheet has a soft and textile-like surface, which also remains dry in repeated wettings. The top sheet may for example be composed of a nonwoven material with a soft and smooth surface, such as for example a spunbond made of polypropylene fibers. To keep the surface closest to the user's skin dry, a hydrophobic nonwoven material having holes can be used so that the holes are formed in the material, the holes of which are larger than the cavities between the fibers of the material. In this sense, the fluid can be conducted down through the holes drilled in the upper sheet towards the underlying absorbent core. Other examples of material in the upper sheet may for example be perforated plastic films, such as for example a perforated polyethylene film. The top sheet may be connected to the underlying backing sheet and the absorption core, for example, by gluing, ultrasonic bonding or through some kind of thermal bonding. Preferably, the top sheet is a non-woven with holes having a density of holes 3-15, preferably 6-12 and more preferably 7-9 holes / cm.

In a preferred embodiment, the upper sheet further comprises small perforations which are placed in the material surrounding the holes of the upper sheet, to further increase the properties of liquid intake and acquisition. Typically the perforations of the top sheet have a density in the range of 20-500, preferably 70-250, and more preferably 120-170 perforations / cm2.

It is desirable that the gauge value of the top sheet material be as high as possible, since a high gauge value has a beneficial effect on the acquisition. However, in order not to affect the softness of the material negatively, it is necessary to obtain a balance, and thus a gauge value in the range of 1.3 to 1.7 mm, preferably around 1.5 mm, has been shown to be suitable.

Also, the material of the top sheet can be a three-dimensional laminate of non-woven and plastic film. The nonwoven can be a hydrophilic material based on 100% polypropylene thermoagglomerated, carded.

The plastic film can be hydrophilic, pre-perforated (small holes) and made from a mixture of polyethylene and polypropylene.

Also, the non-woven portion of the top sheet material may be a spunbonded nonwoven, a nonwoven bonded through air, a spunbonded nonwoven (hydroentangled), blown nonwoven in the molten state or a combination of these. The raw material can be polypropylene (PP), polyethylene (PE), polyester (PET) polyamide (PA) or a combination of these. If there is a combination, there may be a mixture of fibers of different polymers, but each fiber may also contain different polymers (for example, PP / PE bicomponent fibers or PP / PE copolymer). The nonwoven of the textile edge may also include a percentage of natural fibers such as pulp or viscose. The nonwoven can be hydrophilic, hydrophilic or permanent hydrophobic. The nonwoven can have a basis weight in the range from 7 to 50 g.

The plastic film can also be prepared from PE or PP, PET, PLA or starch (or any other thermoplastic polymer) or a mixture or copolymer of polymers mentioned.

The perforated top sheet can also be prepared from a unicapped material, such as a nonwoven or film (as described above).

The top sheet can have an orifice size of 1.6 to 3.2 mm in the machine direction (longitudinally) and 0.9 to 2.3 mm in the transverse direction (laterally). The size of the holes can be from 0.1 to 6.0 mm in diameter.

The holes of the upper sheet can be oval in shape, slightly elongated in the machine direction. The holes can be round / circular or oval in the machine direction or transverse direction.

The open area of the top sheet may be in the range from 2 to 60%, preferably from 5 to 30%, more preferably from 10-20%, more preferably around 14%.

The liquid-resistant backing sheet consists of a flexible material, preferably a thin plastic film of PE (polyethylene), PP (polypropylene), a polyester or some other kind of appropriate material, such as a hydrophobic nonwoven layer or a thin film laminate and a nonwoven material. These types of laminate are often used to achieve a soft and textile-like surface of the backing sheet. To achieve a more ventilated and comfortable product it is also possible to use breathable backing sheets, which prevent the liquid from leaving the absorbent product, but which allow the humidity to be ventilated. These breathable backing sheets may be composed of layers of a single material, or of laminates of, for example, blown or molded polyethylene films, which have been laminated with, for example, a non-woven layer of spunbond or composite. spun agglomerated - soaked in the molten state - spun agglomerated (SMS).

The absorbent structure is usually constituted by one or more layers of cellulosic fibers, for example cellulose fluff pulp. Other materials, which may be used, are for example absorbent nonwoven material, foam material, synthetic fiber materials or peat. In addition to cellulose fibers or other absorbent materials, the absorbent structure may also contain material superabsorbent, the so-called SAP (superabsorbent polymers), which is a material in the form of fibers, particles, granules, film or the like, whose material has the capacity to absorb fluid corresponding to several times the weight of the superabsorbent material. The superabsorbent material absorbs the fluid and forms a gel containing fluid. In addition, the absorbent structure may contain binders, shape stabilizing components and the like. The absorbent structure can be chemically or physically treated to change the absorption properties. For example, it is possible to provide an absorbent layer with compressed regions and / or be compressed throughout the layer or layers to control the flow of fluid in the absorbent body. It is also possible to contain the absorbent layer or layers in a wrapper of, for example, tissue material. For example, the absorbent structure is a pressurized, air-laid structure containing 30-80%, preferably around 40-60%, more preferably 50-60% SAP.

In general, the absorbent structure has an outwardly stretched shape in its longitudinal direction and can, for example, be substantially rectangular, T-shaped or hourglass-shaped. An absorbent body In the form of an hourglass it is wider in the front and back than in the crotch part to provide an efficient fluid absorption at the same time that the design facilitates the product to form and surround the user, thus giving a better fit around the legs. In a preferred embodiment of the present invention, the absorbent structure has substantially straight and parallel longitudinal edges. The back and front edges are rounded to fit the shape of the product. Preferably, the rear and front edges are rounded in the form of at least three different spokes.

Also, the absorbent structure can be provided in the form of a roll material, thereby the material is usually provided with a high compression, or the structure can be formed by means of a placement technique in air.

In yet another embodiment, the absorbent structure is equipped with a wicking layer, the wicking layer of which is intended to disperse the fluid towards the front of the absorbent structure. In addition, the wick layer does not necessarily cover the entire absorbent structure, but preferably must cover at least the part of the absorbent structure that is on the front of the liner, more preferably the part that is on the front and the crotch parts of the liner, and most preferably the entire absorbent structure.

The wick layer is of a moisture permeable material, preferably tissue paper or a hydrophilic nonwoven and functions to disperse the fluid, i.e., the urine passes through the liquid pervious top sheet, preferably in a direction toward the front part of the diaper. The wick layer contains small capillaries that direct the fluid to the smaller capillaries, due to capillary forces.

The additional liquid distribution layers can be used in the product of the invention, preferably between the absorbent structure and the top sheet. For example, it is possible to use additional layers that improve the properties, such as a transfer layer or different types of layers of material for dispersion of fluids or inserts, the so-called batts or very thick and spongy layers. Usually, the liquid distribution layer is a relatively thick, resilient, porous material, for example in the form of a very thick and fluffy fibrous layer, a carded fibrous web, a tow material or another type of bulky and resilient fibrous material having a high momentary capacity to receive liquids and capable of temporarily store the liquid before it is absorbed by the underlying absorbent core. Also, the liquid distribution layer may be in the form of a porous foam material. Also, it may consist of two or more layers of material. In a preferred embodiment, the liquid distribution layer extends towards the lateral edges of the product, i.e. it has basically the shape of the upper sheet or the upper sheet + the textile edges. With this the advantages can be achieved with respect to the distribution of liquids, the sealing on the edges, etc., as already described. However, the liquid distribution layer can also be designed so that it does not extend towards the edge seals. The transfer layer may be a layer placed in air and may consist of SAP.

In addition, the product of the invention is equipped with a release paper that covers the outer side of the backing sheet of the product. Removable paper it is attached to the backing sheet by means of gluing threads.

At the periphery of the product, with an amplitude of approximately 0.5 cm, an edge seal is provided to secure the top sheet, the backing sheet and optionally the liquid distribution layer with each other. The sealing of the edges can be done by means of adhering the layers to each other, by means of etching, by means of hot welding, by means of ultrasonic bonding or a combination of these methods. Preferably, ultrasonic bonding is used. Also, the sealing can be done as a continuous seal or as a small dot seal. Preferably, the sealing is done as spot welding, since this provides some advantages with respect to, for example, the hydrophobic character of the welding points as already described. In general, the welding points are at a distance of approximately 0.1-0.5 mm from each other, preferably around 0.2 mm. To perform ultrasonic bonding, ultrasonic bonding equipment is used. When the ultrasonic joint is made, a welding design is formed, which welding design can have a shape that is visually attractive and / or has technical advantages, such as comfort improved for the user or effects with respect to fluid distribution or improved softness and / or dryness.

To prevent the fluid from leaking, the absorbent product on the side facing the user may also be equipped with internal barriers against liquids, which are joined in relation to the longitudinal edges. Preferably, the internal barriers are prepared from a material impervious to liquids mainly, such as for example a hydrophobic nonwoven or a plastic film, and are formed as a longitudinal path with a first edge connected to the absorbent product and a second free edge. , which is adapted to be in close contact with the user in the use of the absorbent product. The second edge is equipped with one or more elastic elements, preferably an elastic thread, which in the contracted state makes contact with the free edge, whereby an integral barrier is formed. The internal barrier may be designed as a single-sheet tape, wherein the free edge is rotated downward to enclose the elastic member to prevent direct contact of the elastic yarn with the wearer. Otherwise, the barrier can be formed of two combined layers, whereby the elastic thread is joined to the edge of the free end between the two layers. In this case, the inner layer of the barrier can be composed of an elongation of the upper sheet and the outer layer of a material practically impermeable to liquids, or the inner and outer layers of the barrier can be composed of a tape of a only material, which is folded around the elastic thread. In addition, the elastics can be provided in the form of a foam, for example, in a band or thread, or the elastics can be provided in any other traditional way.

In addition, the product of the invention may be equipped with wings. Also products equipped with other wings than those described in this description are also included in the scope of the invention.

Examples In all the appended examples the properties were compared between a panty protection product according to an embodiment of the invention (in this case the so-called "Tena" and some conventional panty protection products (see Table 1 and 2 for the data of the comparative products) The compared products have structures that are similar to Tena.

"Tena" product has an asymmetric shape (see in Figure 1 the main drawing), the top sheet is a perforated laminate between a non-woven material and a plastic film having a basis weight of about 40 gsm having the top sheet with holes It also contains small perforations. In addition, the product contains textile edges, a very thick and fluffy non-woven layer (basis weight of approximately 50 gsm) as a liquid distribution layer, an absorbent core of cellulose fibers and SAP (approximately 50-60%) and a sheet of breathable backing. The product "Tena" is a small pantyhose product and thus the experimental values should be interpreted with respect to a small pantyhose. However, since the results shown for the Tena product can be considered as an effect of using fast entry materials (the upper sheet having large holes, the textile edges having holes and an absorbent core having a large amount of SAP) (about 50-60%)), similar results can be expected for other types of products that are formed in a similar way by the same principles, but being larger, heavier and thicker.

Table 1 Table 2 Example 1 - Acquisition The acquisition properties (acquisition time) (analysis method No. 17-28-14) were tested by exposing the different products for a first entry of 5 mL of synthetic urine followed by a second entry of 5 mL of synthetic urine (NaCl 0.9% in water) with an interval of 10 minutes. The results can be seen in Figure 5, showing that Tena is much faster than almost all the other products for the first entry, with the exception of Always long pantyglasses, and much faster than other products for the second entry. This shows that the construction of Tena is very capable of rapid fluid acquisition (not the last of the urine type, thus reducing the risk of any leakage.

Example 2 - DORUP (retention) The retention properties were analyzed by exposing the different products for an input of 7 mL of liquid (synthetic urine) (see Figure 6). For more details related to the DORUP experiment (retention), reference is made to US-B-6557398, which is included herein as a reference. How can Note, Tena is much drier than all the products compared. This shows that the retention properties of Tena are superior to the compared products.

Example 3 - Rothwell (absorption capacity) The Rothwell value (g) (ISO Method 11948-1) was analyzed (see Figure 7). Tena showed to have a capacity of absorption much greater than all the pantiprotectores compared.

Claims (14)

1. An absorbent product chosen from an incontinence protector, a sanitary napkin and a pantiprotector, containing an upper sheet with liquid-permeable holes facing the user during use, and a liquid-resistant backsheet in the opposite direction of the user during use, whereby longitudinally extending textile-like edges are placed on both longitudinal sides of the upper sheet, characterized in that the textile-like edges contain holes.
2. The absorbent product according to claim 1, characterized in that the holes of the textile-like edges have a diameter in the range from 0.2 to 6 mm, preferably a size in the transverse direction from 0.8 to 1.2 mm and a size in the direction of the machine from 1.2 to 1.8 mm.
3. The absorbent product according to claim 1 or 2, characterized in that the density of the holes in the textile edges is in the range from 4-250 holes / cm2, preferably from 50-120 holes / cm2.
4. The absorbent product according to any of the preceding claims, characterized in that the holes of the upper sheet have a size in the machine direction in the range from 1.6 to 2.4 mm and a size in the transverse direction in the range from 0.9 to 2.3 mm.
5. The absorbent product according to any of the preceding claims, characterized in that the ratio between the diameter (size) of the holes of the upper sheet and the diameter (size) of the holes of the textile type edges is at least 1, preferably at least 2.
6. The absorbent product according to any of the preceding claims, characterized in that the density of the holes in the upper sheet is in the range from 3-15, preferably 6-12 and more preferably 7-9 holes / cm2.
7. The absorbent product according to any of the preceding claims, characterized in that the material of the upper sheet further contains perforations, which are placed between the holes of the upper sheet, having a diameter in the range of 0.05 to 1 mm, preferably in the range from 0.1 to 0.4 mm.
8. The absorbent product according to claim 7, characterized in that the density of the perforations in the upper sheet is in the range from 30-500, preferably 50-200 and more preferably 70-120 perforations / cm2.
9. The absorbent product according to any of the preceding claims, characterized in that the ratio between the open area of the upper sheet and the open area of the textile type edges is at least 2.
10. The absorbent product according to any of the preceding claims, characterized in that the upper sheet and the backing sheet are sealed together at the periphery of the product thereby forming a seal on the edges, whereby the sealing at the edges is at least partly formed by spot welding, as can be soldered by ultrasonic points.
11. 11. The absorbent product according to claim 10, characterized in that the welding points have a hydrophobic character.
12. 12. The absorbent product according to claim 10 or 11, which contains a liquid distribution layer between the upper sheet and the absorbent structure, whereby the liquid distribution layer extends to the periphery of the product so that it forms a part of the seal on the edges.
13. 13. The absorbent product according to claim 12, characterized in that the liquid distribution layer is in the form of a very thick and fluffy layer.
14. 14. The absorbent product according to any of the preceding claims, characterized in that the ratio between the thickness of the part central of the product (T) and the thickness of the sealing of the edges (t) is at least 3. The absorbent product according to any of the preceding claims, characterized in that the product has a longitudinal dimension which is in the range from 13-22 cm, preferably smaller than 15 cm and a lateral amplitude, in the at least wide position of the crotch part, which is in the range from 4 to 6.5 cm, preferably smaller than 5 cm. The absorbent product according to any of the preceding claims, characterized in that the product has an acquisition time for a first entry of 5 mL of synthetic urine that is below 6 s, preferably equal to or less than 5 s, and / or an acquisition time for a second 5 mL inlet of synthetic urine that is below 8 s, preferably equal to or below 4 s. The absorbent product according to any of the preceding claims, characterized because the product has a DORUP value (retention) for a 7 L dose of synthetic urine that is below 1 g, preferably below 0.5 g and more preferably equal to or below 0.2 g. The absorbent product according to any of the preceding claims, characterized in that the product has a Rothwell value (absorption capacity) of more than 45 g, preferably more than 55 g. SUMMARY OF THE INVENTION The invention relates to an absorbent product chosen from an incontinence protector, sanitary napkin and panty protection, which contains an upper layer with liquid-permeable orifices facing the user during use, and a liquid-resistant backsheet in the direction contrary to the user during use, whereby the longitudinally extending textile-like edges are placed on both longitudinal sides of the upper sheet whereby the textile-like edges contain holes. With which, the textile type edges, among others, will have the capacity to transport moisture that forms at the interface between the textile type edges and the user's skin. In addition, the holes will allow a certain acquisition, that is, that the liquid is transported to the absorbent structure of the product.