MXPA99007227A - Liquid-pervious cover layer for an absorbent article - Google Patents

Abstract

The present invention pertains to a liquid-pervious cover layer (1, 201, 301) for an absorbent article, such as a sanitary napkin (300), a panty-liner, a diaper, or the like, which comprises a liquid-pervious carrier layer (2) against which individual hydrophobic fibres (3), detached from each other and each exhibiting two fibre ends, are attached with one fibre end against the carrier layer (2), with an attachment angle&agr;between the carrier layer (2) and each individual fibre (3). The cover layer (1, 201, 301) exhibits fibre-free regions (4) for facilitating liquid transfer through the cover layer. The invention further includes and absorbent article provided with the cover layer (1, 201, 301), and a method of manufacturing the cover layer (1, 201, 301).

Description

COATING COAT, PERMEABLE TO LIQUIDS, FOR AN ABSORBENT ITEM FIELD OF THE ART The invention pertains to a liquid-permeable coating layer for an absorbent article such as a diaper, an incontinence guard, a sanitary napkin or the like, and has a liquid-permeable carrier layer with a first surface and a second surface, wherein the first surface of the carrier layer has a multitude of individually arranged fibers, each fiber having a first fiber end and a second fiber end, and being joined with a fiber end against the first surface of the fiber. carrier layer. The invention also relates to an absorbent article provided with the coating layer and to a method for manufacturing the coating layer.

TECHNICAL BACKGROUND The great demands of softness and dryness are made on the liquid-permeable coating layers for absorbent articles of this type, which are proposed to be carried on the body of the user during use. However, it has been proved that it is difficult to obtain a liquid-permeable coating layer with a soft and textile-like surface which at the same time remains dry during use. A problem, when using nonwovens or other similar textile materials as the layers of liquid permeable coatings for absorbent articles is that the fiber structure of the material absorbs liquid when the coating layer is wetted. A certain amount of liquid is not conducted down to the underlying absorbent structure, but instead remains in the liquid permeable coating layer. Since the liquid permeable coating layer is carried on the wearer's body during use, these articles are perceived as wet and uncomfortable for use after initial wetting. In addition, the wet surface, which is in direct contact with the skin during use, causes an increased risk of skin irritations and infections. The most important reason that some of the liquid remains in the fiber structure is that the textile materials usually consist of an irregular fiber structure with fibers or fiber filaments oriented in the plane of the material. This implies that the excreted body fluid, by means of the capillary action of the fibers, is distributed along the structure of the fiber in the direction of the plane of the material. Also, the liquid that is not absorbed in the capillaries of the fiber is conducted along the structure thereof in the direction of the plane of the material, and is collected in the cavities between the fibers in which the liquid is retained without be able to disperse further towards the underlying material. These factors give rise to a certain amount of liquid remaining in the coating layer and origin to a wet surface closer to the user. Nowadays, another problem with nonwovens having fibers oriented practically parallel to the plane of the material, is that the possibility of controlling the course of wetting is limited by using the properties of the fibers, for example, the wettability of the fibers. the different fibers. In addition, the possibility of controlling the course of the humidification is limited when it reaches the fiber site and its design. It is already known, from US 3,967,623, the use of a liquid-permeable coating layer consisting of a perforated plastic layer, as a carrier material on which the fibers treated with wetting agent are applied to create a soft and fluffy surface . The individual fibers are oriented so that they are directed upwards towards the user during use and are approximately 5 mm long. Since the fibers are directed upwards, towards the user, a soft and fluffy surface is created. However, the problem persists in that the transfer of liquid from the fibers into the underlying absorbent body is deficient, which gives rise to a surface close to the user that remains wet after wetting. In BE 0930052 there is described a coating layer for an absorbent article whose coating layer consists of a plastic film which at least on one side is covered by fibers which are joined at an angle to the plastic film. To obtain this structure, the fibers can, for example by means of electrostatic or artificial velvety, be joined with one of their ends of the fiber with a fixing layer of the molten fiber on the plastic film. The plastic film can be perforated so that the material becomes permeable to liquids. The fibers are 0.3 to 2.5 mm long and the thickness can vary taking into account the softness that the layer must have. It is possible to use different fibers, such as, for example, viscose, cotton, polyethylene, polypropylene, polyester and polyamide. The risk of the liquid dispersed in the plane of the material and therefore along the surface of the coating layer is minimal with this previously known coating layer. In addition, the coating layer has a smooth surface closer to the user. However, with this previously known coating layer there still remains the problem of obtaining a dry surface when the layer is used as a liquid-permeable surface material on an absorbent article.

SUMMARY OF THE INVENTION By means of the present invention, the problems with obtaining a liquid-permeable coating layer for absorbent articles, which is smooth and has a dry surface also after wetting, have been practically eliminated. Accordingly, by means of the invention, a smooth, skin-friendly and cloth-like coating layer has been obtained for an absorbent article, the layer of which has the ability to conduct liquids down to an underlying absorbent structure and maintain by this means a dry surface close to the user. A liquid-permeable coating layer, according to the invention, is distinguished mainly because the carrier layer has a plurality of regions which are practically free of fibers and each occupies a surface such that a circle with a diameter of 3. at 15 mm and preferably with a diameter of 3 to 10 mm can be accommodated within each fiber-free region. The fiber-free regions of the coating layer allow the liquid to pass between the hydrophobic fibers through the liquid-permeable coating layer. At the same time, the hydrophobic fibers provide a smooth, skin-friendly surface, which isolates the liquid absorbed from the user's skin when the coating layer is being used as a liquid-permeable top sheet on an absorbent article. A coating layer according to the invention has been found to work particularly well when the hydrophobic fibers are 0.3-2.5 mm long and preferably 0.3-1.5 mm long. The fibers can be arranged in a wide range of different surface designs such as paintings, bands, stars, flowers, dots, rings, etc. Combined designs and designs that have fiber densities can also be used. When the fibers are arranged in strips or band-shaped regions, the distance between two regions covered by adjacent fibers would be in the order of 3-15 mm and preferably 3-10 mm. To obtain the desired liquid permeability, it has been shown that the total area of the fiber-free regions must occupy at least 25% of the surface of the carrier layer. However, the fiber-free regions should not occupy more than 60% and preferably not more than 50% of the surface. The advantage with this coating layer is that the hydrophobic surface of the individual fibers creates a dry barrier between the liquid-permeable carrier layer and the user. This implies that the risk that the carrier surface closest to the user is perceived as wet after wetting is reduced. According to the invention, the individual fibers are bound only to delimited regions of the total area of the carrier layer, while other regions of the surface of the carrier layer are left free of the individual fibers. For example, the individual fibers may be joined in a row pattern along the longitudinal direction of the article. The advantage with this design is that the liquid is distributed from the point of wetting in a direction towards the end portions of the article, while the dispersion of the liquid in the lateral direction is counteracted. By this means the risk is reduced that the region around the point of wetting will be saturated with the liquid, with leakage in the lateral direction as a consequence. Another advantage, with the distribution of the liquid from the point of wetting the article to the end portions thereof, is that the distribution of the liquid in an underlying absorbent structure becomes more uniform. This results in a better utilization of the total liquid absorption capacity of the underlying structure. The individual fibers may also be joined in other designs, wherein the carrier surface has delimited regions that are free of bonded fibers. The carrier layer may furthermore present a continuous region through the entire surface of the carrier layer which is free of fibers. This implies that individual fibers are linked to smaller regions, delimited from the surface of the carrier layer, whose regions are delimited from each other by the continuous region of the carrier layer that is free of fibers. An advantage with this embodiment is that the liquid distribution capacity of the carrier layer increases as the liquid is more easily distributed along a continuous region that is free of bound fibers, having a hydrophobic surface structure. This embodiment is particularly advantageous when the carrier layer is made of a nonwoven material which itself can function as a liquid distribution layer, but of course, it is also applicable for other carrier materials.

According to one embodiment, the individual fibers are made of bicomponent fibers, having a hydrophobic surface and a hydrophilic core. An advantage with the use of bicomponent fibers is that the hydrophilic core of the fibers has the ability to conduct the liquid down to the liquid permeable carrier layer [sic]. This implies that the amount of liquid between the fibers decreases, giving rise to a drier surface and a reduced risk of leakage of liquid out of the user's underpants. According to another embodiment, the components in the bicomponent fiber have different melting temperatures. By this means, the component constituting the core of the fibers preferably has a melting temperature greater than the component constituting the external structure of the fibers. The advantage with a difference in melting temperature is that the need for an adhesive is eliminated when the fibers are bonded to the carrier layer, since the fibers are heated to a temperature between the melting temperatures of the fiber components when these are applied against the carrier material. This implies that the external component is melted, whereby the bicomponent fibers present a surface of molten fiber which is attached to the carrier layer. According to yet another embodiment, the individual fibers are constituted of hollow fibers, having an external surface and an inner surface of which at least the outer surface of the hollow fiber is hydrophobic. Consequently, the inner surface of the hollow fiber is hydrophilic or hydrophobic. An advantage with this fiber is that the liquid can be led down the fiber cavities down to the liquid-permeable carrier layer. This implies that the amount of external liquid between the individual fibers is reduced, giving rise to a drier surface and a reduced risk of leakage of liquid to the underpants by the wearer. Another advantage with hollow fibers is that the consumption of material during the manufacture of these fibers is small, with little consumption of raw material. According to yet another embodiment, the carrier layer is constituted by a laminate with multiple layers. This multilayer laminate has at least one lower layer, and a fiber fixing layer, wherein the fiber fixing layer has a lower melting temperature than the lower layer. When the individual fibers are joined, the carrier layer is heated to such a temperature that the fixing layer of the fibers melts, while the lower layer remains intact. Accordingly, the need for a special adhesive to bond the fibers is eliminated.

According to yet another embodiment, the carrier layer exhibits a liquid penetrability since the layer has been perforated. This embodiment refers mainly to the carrier layers that are constituted of a material impervious to liquids initially, such as a film having one or several layers, but can also be applied to increase the penetrability of liquids of different types of materials. non-woven. The carrier layer may also contain a liquid-permeable textile material, such as, for example, a non-woven, hydrophilic fabric. An advantage with the nonwoven hydrophilic as a carrier material is that these materials are permeable to liquids per se. This implies that the carrier layer does not have to be perforated to obtain liquid penetrability. Another advantage with the nonwoven hydrophilic as a carrier material is that this material has the ability to distribute the liquid in the plane of the material layer. Accordingly, this carrier layer also functions as a liquid distribution layer, which gives rise to a greater degree of utilization of the total absorption capacity of the underlying structure. In yet another modality, the density of the fiber varies across the surface of the carrier layer using different designs or design density for different parts of the surface. This implies that the liquid-permeable carrier layer has a difference in the number of individual fibers bound per unit area. The advantage with a difference in fiber density is that the possibility to guide the liquid in the desired direction is increased. A different fiber density can thus reduce the risk that the region around the wetting point will be saturated with leaking liquid as a consequence. According to one embodiment, the angle of attachment to, between the carrier layer and each of the individual fibers is about 90 °, but may, of course, vary somewhat between the different fibers. The advantage with this modality is that the body fluid is rapidly driven in a straight direction towards the carrier layer, and in addition to the underlying absorbent structure. Thus, the risk of the layer being perceived as wet is minimized. According to another embodiment, the angle α between the carrier layer and each of the individual fibers is 30-70 °. Since the fibers are angled so that they present an angle smaller than 90 ° between the surface of the carrier layer and the individual fibers, the surface maintains a clean and dry visual impression also after use since the inclined fibers mask the carrier layer permeable to liquids, so that it is not visible when the user observes the sanitary towel from above. There are several factors that influence the choice of fibers and carrier layers, and the location of the fibers through the surface of the carrier layer. For example, the properties of the material must be adapted with respect to the type of liquid that the article must absorb, and to the properties that have the underlying absorbent structure, with respect to the drainage capacity of the liquid and the liquid retention capacity. By means of the possibility of varying the structure of the design, the type of fiber and the type of carrier layer within the scope of the invention, however, a liquid-permeable coating layer having a reduced surface wetting and a increased softness. The invention also includes an absorbent article, such as a sanitary napkin, a pantyhose, a diaper or the like, containing an absorbent body contained in a cover, wherein at least a part of the cover consists of a cover layer permeable to a cover. the liquids, according to the invention. The liquid-permeable coating layer consists of a liquid-permeable carrier layer against which the individual hydrophobic fibers, separated from each other, and each having two fiber ends, is joined with a fiber end against the carrier layer. By this means, an angle of attachment a is formed between the carrier layer and each individual fiber. The liquid-permeable coating layer is mainly characterized in that the carrier layer has a plurality of regions that are practically free of fibers and that each occupies a surface, so that a circle with a diameter of 3 to 15 mm, and of Preference with a diameter of 3 to 10 mm can be accommodated within each fiber-free region. In addition, the invention includes a method of manufacturing a coating layer for an absorbent article, wherein the individual fibers, each having a first fiber end and a second fiber end, are applied with the first end of the fiber against a carrier layer. At least at the first end of the fiber, the cross-sectional area of the fibers has a first portion consisting mainly of a first component and a second portion consisting mainly of a second component., wherein at least the first component can be melted and has a melting temperature at which the second component is in a solid state. Only the first component melts, before or after the application of the fibers against the carrier layer. Then, the temperature of the fibers is reduced below the melting temperature of the first component, whereby a solid connection between the fibers and the carrier layer is obtained. The advantage of attaching the fibers to the carrier layer by causing the first component to melt is that the need for an adhesive is eliminated when the fibers are bonded to the carrier layer. In addition, the need for a fused fiber fixing layer is eliminated, which implies that the carrier layer may be constituted of a single layer of material.

BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described in greater detail with reference to the figures shown in the accompanying drawings. Figure 1 shows a cut through a liquid permeable coating layer, according to the invention; Figure 2 shows another cut through a liquid permeable coating layer, according to the invention, and Figure 3 shows a sanitary towel according to the invention seen from the proposed side will be in front of the user during the use DETAILED DESCRIPTION OF THE PREFERRED MODALITIES The liquid permeable coating layer 1, as shown in Figure 1, consists of a carrier layer 2 on which individual fibers 3 are joined. The individual fibers 3 are bonded to the carrier layer 2. with one end, while the other free ends are directed away from the carrier layer, whereby the individual fibers are arranged at an angle a with respect to the carrier layer. In the example shown, the angle of attachment a is approximately 90 °, but of course something may vary between different fibers. To facilitate the passage of liquid through the liquid-permeable coating layer 1, the fibers 3 are arranged in separate regions with regions without fibers 4 therebetween. When the fibers 3 are joined to the carrier material 2, the fibers 3 are oriented so that one end of the fibers is directed towards the carrier layer 2. This fiber orientation is achieved, for example, by means of electrostatic velvetle. The individual fibers 3 are made up of fibers comprising a surface that is mostly hydrophobic. Accordingly, the coating structure is constituted of, for example, a polyolefin. According to one embodiment, the fibers 3 are made up of fibers and components where the surface component consists of polyethylene, such as, for example, LDE (low density polyethylene), HDPE (high density polyethylene) or LLDPE (polyethylene). linear low density). The surface of the fibers may also consist of polymer mixtures containing at least two of the aforementioned polyethylene components, or other components having a practically hydrophobic surface. The core of the fibers 3 is made of a less hydrophobic material than the surface of the fibers. An example of a material that is less hydrophobic than polyethylene is polyester. In addition to the fact that the component is less hydrophobic, the polyester also has a higher melting temperature than polyethylene. This difference in the melting temperature between the components can be used when the fibers are attached to the carrier layer. Since the fibers are heated to a temperature between the melting temperature of the two components during bonding, a molten surface is formed on the fibers and components, while the core remains solid. By this means, the molten surface component can be used to bond the fibers to the carrier layer 2, eliminating the need for a special adhesive for bonding the fibers 3 to the carrier layer 2. Joining the fibers 3 to the layer carrier 2 can, of course, also be carried out with another joining method. The component fiber can also consist of other components besides those mentioned before they present a difference in hydrophilicity. The individual fibers 3 can also be made up of hollow fibers having a hydrophobic surface and a hollow core. The surface of the fiber may, for example, consist of polyolefins or other materials having a hydrophobic surface. The carrier layer 2 can be a single layer of material, or it can consist of a multilayer laminate. The carrier layer 2 shown in Figure 1 may be constituted of a single layer of material, as for example a plastic film or a non-woven fabric hydrophilic. The individual fibers 3 are bonded to the carrier layer 2, for example by being applied on a melt-fiber fixing layer, or with an adhesive such as hot-melt hydrophilic sizing or another adhesive which is suitable for the purpose. As already mentioned, the fibers 3 can also be joined to the carrier layer by means of the fibers 3 made up of fibers and components containing the components having different melting temperatures. The fibers 3 can also be joined to the carrier layer by means of fibers 3 consisting of bicomponent fibers consisting of components having different melting temperatures. The fibers 3 can also be attached to the carrier layer 2 by means of the carrier layer 2 consisting of a multilayer laminate with a bottom layer and a fiber attachment layer. The lower layer has a higher melting temperature than the fiber fixing layer and consists of, for example HDPE, polypropylene or other suitable material for the purpose. The fiber binding layer consists of, for example LDPE, LLDPE or other materials suitable for the purpose which have a lower melting temperature than the material of the lower layer. The liquid permeable coating layer 201 shown in Figure 2 has a construction similar to the liquid permeable layer 1 shown in Figure 1. Accordingly, the liquid permeable layer 201 has a barrier layer 202 as can be the carrier layer 2 shown in Figure 1, on which the fibers 203 are joined. The fibers 203 are joined to limited regions of the total area of the carrier layer 202, whereby the carrier layer 202 has regions that they are free of fibers 203. The fibers 203 are joined with one of their ends, while the other free ends are directed away from the carrier layer 202, whereby the individual fibers 203 are joined at an angle a to the carrier layer 202 The angle α between the individual fibers 203 and the carrier layer 202 is 30-70 °, preferably about 45 °. Since the individual fibers are at an angle with the carrier layer 202, at an angle a, which is less than 90 °, this implies that the regions of the carrier layer 202 that are free of fibers 3 are not visible when the permeable layer to liquids 201 is observed from above. Like the fibers 3, the fibers 203 may be made of bicomponent fibers or hollow fibers having a hydrophobic surface. The carrier layer 202 may be a single layer of material, or may consist of a multilayer laminate. The carrier layer 202 shown in Figure 2 is only constituted by a layer, such as a plastic film or a hydrophilic nonwoven fabric. The fibers 203 are bonded to the carrier layer 202, for example, being applied over a melt-fiber fixing layer, or applied over an adhesive layer such as, for example, hot-melt hydrophilic sizing or any other suitable adhesive for the purpose. In addition, the fibers 203 can be composed of bicomponent fibers consisting of a fiber surface with a melting temperature lower than the core of the bicomponent fibers. This implies that the melted surface component of the fibers 203 is bonded to the carrier surface and consequently the need for a special adhesive is eliminated. The sanitary napkin 300 shown in Figure 3 consists of a liquid permeable coating layer 301, according to the invention, a liquid impermeable coating layer 305 and an absorbent body 306 contained between the coating layers. The liquid impervious coating layer 305 consists of a plastic film, a fabric of hydrophobic fibers, a laminate of these materials or any other similar material suitable for use, placed on the side of the proposed hygienic towel will be separated from the user during use. The absorbent body 306 contained between the coating layers 301, 305 is usually composed of one or more layers of fluffy cellulose pulp. The fluffy pulp of cellulose can be mixed with fibers or particles of a highly absorbent polymeric material of the type which during the absorption chemically binds large quantities of liquid while forming a gel containing the liquid. To improve the properties of the absorbent body 306, additional components can also be included in the absorbent body. Examples of these components are binder fibers, form stabilizing components or the like. In addition, the absorbent body 306 may be comprised of absorbent foams, or any other liquid absorbent material. The covering layers 301, 305 have a greater extension in the plane of the sanitary towel 300 than the absorbent body 306, around the entire periphery thereof. The projecting portions 308 of the cover layers 301, 305 are mutually connected around the absorbent body 306, for example, by gluing, welding or otherwise. The liquid permeable coating layer 301 has a construction similar to the liquid permeable coating layer 1 shown in Figure 1 and, consequently, has a carrier layer 302, to which the fibers 303 are attached at a surface design of strips or regions in the form of alternating bands with regions without fibers or practically without fibers in the form of bands 304. The width of the regions without fibers 4 should be 3-15 mm and preferably 3-10 mm . The fibers 303 are bonded to the carrier layer 302 with an attachment angle a which is approximately 90 °, but which, of course, may vary somewhat between the different fibers. The coating layer 301 is permeable to liquids since the carrier layer 302 has perforations through the material, or by means of the carrier layer being constituted of the liquid permeable material as, for example, a hydrophilic nonwoven fabric. In addition, the absorbent body 306 can constitute a carrier layer 302 when it has a sufficient cohesive capacity, wherein the fibers are bonded directly to the side of the proposed absorbent structure will be brought against the wearer during use. In the above embodiments, the invention has been described with reference to sanitary napkins but is, as already mentioned, of course, also applicable to incontinence guards, diapers, panty-protectors and the like. The invention also relates to all conceivable combinations of the aforementioned embodiments, and is also applicable to other embodiments within the scope of the following claims.

Claims (15)

1. A liquid-permeable coating layer (1) for an absorbent article such as a diaper, an incontinence protector, a sanitary towel (300) or the like, having a liquid-permeable carrier layer (2) with a first surface and a second surface, wherein the first surface of the carrier layer (2) has a multitude of individually arranged fibers (3), each fiber having a first fiber end and a second end of the fiber, and being joined with a end of the fiber against the first surface of the carrier layer (2), characterized in that the carrier layer (2) has a plurality of regions (4) that are virtually free of fibers (3) and occupies a surface, so that a circle with a diameter of 3 to 15 mm and preferably with a diameter of 3 to 10 mm can be accommodated within each fiber-free region (4).

2. The liquid permeable coating layer according to claim 1, characterized in that the individual fibers (3) are composed of bicomponent fibers having a fiber surface and a core, wherein at least the surface of the fiber It is hydrophobic.

3. The liquid permeable coating layer according to claim 2, characterized in that the surface of the fiber is more hydrophobic than the core.

4. The liquid-permeable coating layer according to claim 2, characterized in that the surface of the fiber has a melting temperature lower than that of the core.

5. The liquid-permeable coating layer according to claim 1, characterized in that the fibers (3) are constituted of hollow fibers with an external surface and an internal surface, of which at least the external surface is hydrophobic.

6. The liquid-permeable coating layer according to any of claims 1-5, characterized in that the fibers (3) are joined to the first surface of the carrier layer (2) with an angle of attachment to between the carrier layer (2) and each individual fiber (3) of 30-90 °.

7. The liquid permeable coating layer according to any of the preceding claims, characterized in that the carrier layer (2) is constituted of a multilayer laminate.

8. The liquid-permeable coating layer according to any of the preceding claims, characterized in that the carrier layer (2) consists of a perforated plastic film.

9. The liquid permeable coating layer according to any of the preceding claims, characterized in that the carrier layer (2) consists of a hydrophilic nonwoven fabric.

10. The liquid permeable coating layer according to any of the preceding claims, characterized in that the carrier layer (2) within different regions of the surface of the carrier layer (2), presents a difference in the number of individual fibers joined (3) per unit area.

11. The liquid-permeable coating layer according to any of the preceding claims, characterized in that the hydrophobic fibers (3) are 0.3-2.5 mm long and preferably 0.3-1.5 mm long.

12. The liquid-permeable coating layer according to any of the preceding claims, characterized in that the carrier layer (302) has a plurality of fibers (303) arranged in band-like regions (304) on the first surface of the carrier layer (302), the distance between two regions covered with adjacent fibers being 3-15 mm and preferably 3-10 mm.

13. The liquid-permeable coating layer according to any of the preceding claims, characterized in that the fiber-free regions (4) occupy at least 25% of the surface of the carrier layer (2).

14. An absorbent article such as a diaper, a protector against incontinence, a sanitary towel (300) or the like, consists of an absorbent body (306) contained in a cover, wherein at least a portion of the cover consists of a liquid-permeable coating layer (301) according to claim 1 which consists of a carrier layer (302) against which the individual hydrophobic fibers (303), separated from each other and each having two ends of the fiber, are joined with a fiber end against the carrier layer (302) with an attachment angle of between the carrier layer (302) and each individual fiber (303), characterized in that the carrier layer (302) has a plurality of regions (304) that are substantially free of fibers (303) and that each occupies a surface in a way that that a circle with a diameter of 3 to 15 mm and, preferably with a diameter of 3 to 10 mm can be accommodated within each fiber-free region (304) of the carrier layer (302).

15. A method of manufacturing a coating layer (1) according to claim 1, for an absorbent article, wherein individual fibers each having a first fiber end and a second fiber end are applied with the first end of the fiber against a carrier layer (2), characterized in that the fibers (3), at least at the first end of the fiber, in one cut presents a first portion consisting mainly of a first component, and a second portion consisting mainly of a second component, wherein at least the first component can melt and has a melting temperature in which the second component is in a solid state, where only the first component is caused to melt, at least at the first end of the fiber of the fibers, with which the fibers (3) are bonded to the carrier layer (2), after which the temperature of the fibers (3) is reduced to a temperature lower than the melting temperature of the first component e, whereby a solid connection is obtained between the fibers (3) and the carrier layer (2).