JP2006523168A - Arrangement and method for applying elastic elements to a material web - Google Patents

Abstract

The present invention is an arrangement for applying the elastic elements (1a, 1b, 1c) to the continuous material web (7), wherein the elastic elements (1a, 1b, 1c) are successively arranged from one to the next. second for advancing in; (4,5 '4,5), and the material web (7) second scheduled speed _{(V 2)} one scheduled speed first roller device for advancing in _{(V 1)} It relates to one including a roller device (6; 11, 12). The present invention is characterized in that the second speed (V ₂ ) is faster than the first speed (V ₁ ), and the arrangement is a combined thickness of the elastic elements (1a, 1b, 1c) and the material web (7). A contact surface (6; 10a) arranged at a distance (d) from the first roller device (4, 5; 4, 5 ') smaller than the longitudinal length of the elastic element (1a, 1b, 1c) Stretching in the direction is realized when they pass between the first roller device (4, 5; 4, 5 ') and the abutment surface. The invention also relates to a method for the application of said elastic element and an absorbent product produced by said arrangement and method. The present invention creates an improved method for applying elastic elements that provides a clean appearance and low material consumption of the finished article in the form of an absorbent product.

Description

  The present invention is an arrangement for applying an elastic element to a continuous material web, the first roller device for advancing the elastic element continuously from one to the next at a first predetermined speed, and the material web A second roller device for advancing the motor at a second predetermined speed.

  The present invention is also a method for applying an elastic element to a continuous material web, wherein the elastic element is continuously advanced from one to the next at a first predetermined speed, and the material web is advanced at a second predetermined speed. Relates to a method comprising advancing at a.

  Various types of elastic elements are used in connection with absorbent products such as baby diapers to give the finished article suitable elasticity, for example along its crotch or waist area. Such an elastic element can be constituted, for example, by a narrow strip having suitable elastic properties, which is then applied along the side of the absorbent product. The application of elastic elements can also be utilized in other absorbent products such as adult incontinence pads and sanitary napkins.

  According to the prior art, elastic elements of the type described above are applied to the absorbent product in such a way that they are first stretched somewhat and then attached to the underlying material web. This is preferably achieved in this case by gluing or ultrasonic welding. After this, additional material layers and components can be attached to the product, which is then cut to a suitable length to form the finished article. The elastic element will then create a suitable elasticity in the finished article.

  The application of the elastic elements can be realized intermittently, i.e. in such a way that the individual elastic elements are applied along the underlying material web in successive positions one after the other. Alternatively, application of the elastic element can be realized by attaching a continuous strip of suitable elastic material to the material web.

  A conventionally known arrangement for applying an elastic element to an absorbent product in the form of a diaper is shown in patent document US Pat. No. 4,239,578. This document describes a system for applying an elastic element in the form of a strip between an upper layer and a lower layer, the upper layer being first coated with an adhesive. The system includes a supply roller for the elastic element, which is driven at a lower speed than the forward speed for the upper and lower layers. In this way, the elastic elements are stretched somewhat before they are applied. After application of the elastic elements (and other material layers forming part of the product), the material layers pass through a cutting bay where they are cut into individual diapers.

  Although the arrangement described in US Pat. No. 4,239,578 has in principle satisfactory work, there is still a need for continued improvements in arrangements and methods for applying elastic elements to absorbent products. There is a particular need for intermittent application of elastic elements, which gives the opportunity to produce absorbent products with low material consumption and even attractive appearance.

  The main object of the present invention is to provide an improved arrangement and an improved method in which the above-mentioned desires and requirements are satisfied.

  The object mentioned above is an arrangement of the type mentioned at the outset, wherein the second speed is faster than the first speed, and the arrangement is smaller than the combined thickness of the elastic element and the material web. A contact surface arranged at a distance from the roller device, characterized in that the longitudinal extension of the elastic elements is realized when they pass between the first roller device and the contact surface Achieved by placement.

  The object is a method of the type mentioned at the outset, wherein the material web is advanced so that the second speed is faster than the first speed, which is smaller than the combined thickness of the elastic element and the material web The elastic element is supplied between a contact surface arranged at a distance from the first roller device and the first roller device, and an extension in the longitudinal direction of the elastic element is obtained. Achieved by the way you do.

  According to the first example of the present invention, the contact surface defined by the peripheral surface of the second roller device is used. In this example, the elastic element is supplied to the underlying material web, which is first glued by an adhesive bay. As each elastic element meets the material web in a space defined by the distance between the first roller device and the second roller device, the elastic element will be applied to the material web as the elastic element is extended.

  According to a further example, the first roller device can include a fitting roller and a gripping roller, while the second roller device is preferably constituted by a laminated roller.

  According to a further example of the invention, an abutment surface defined by the active surface of the ultrasonic horn is utilized. In this example, no adhesive is utilized, instead elastic elements are fed against the underlying material web adjacent to the ultrasonic horn. As each elastic element meets the material web in a space defined by the distance between the first roller device and the ultrasonic horn, the elastic element will be applied to the material web by ultrasonic welding as the elastic element is extended.

  According to a further example of the invention, a two-step elongation of the elastic element is provided. In this case, a first roller device is used, which includes a fitting roller and a gripping roller, which is driven at a speed lower than the speed of the gripping roller.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described with reference to preferred examples and the accompanying drawings.
FIG. 1 shows a basic side view of an arrangement for applying an elastic element according to a first example of the invention.
FIG. 2 is a schematic and somewhat simplified perspective view showing a material web having a large number of applied elastic elements.
FIG. 3a shows in enlarged form the first step of the method for applying the elastic element.
FIG. 3b shows in enlarged form the second step of the method for applying the elastic element.
FIG. 4 shows a basic side view of an arrangement for applying an elastic element according to a second example of the invention.
FIG. 5 shows in enlarged form the method for applying the elastic element according to the second example.

  The invention will be described with reference to the preferred examples. As illustrated by FIG. 1, the present invention is configured according to a first example by an arrangement for applying an elastic element to an absorbent product. The present invention can preferably be used in connection with a manufacturing method for absorbent products such as diapers, incontinence pads or sanitary napkins.

  As shown in FIG. 1, a continuous strip or web 1 of elastic material is provided. Preferably, this material is constituted by a relatively thin ductile strip of polyurethane foam, but other materials are also conceivable, for example ductile synthetic materials, which can then be given in the form of bands, tapes or strips, It is continuously paid out from the reel 2 in connection with the manufacturing method for the absorbent product. A supply roller (not shown) is preferably used for the supply of elastic material, which can be arranged for the advancement of elastic material from the reel 2 in a known manner.

  The elastic strip 1 is fed through two rollers, precisely in the form of a cutting roller 3 and a fitting roller 4 which are arranged rotatably. In a manner known per se, the cutting roller 3 is arranged to cut the elastic strip 1 into separate continuous lengths. In FIG. 1, such separate elastic strips are indicated by reference numerals 1a, 1b and 1c.

The elastic strips 1a, 1b, 1c are given a length adjusted to the elastic properties and size of the desired elastic region on the finished absorbent product. In the feed process, the mating roll 4 is rotated along its periphery at a first scheduled speed V _1. Preferably, the cutting roller 3 has the same speed V ₁ as the mating roller 4 so that the cutting roller 3 cuts the elastic strip 1 at substantially the same point during its rotation along the circumference of the mating roller 4. .

  Preferably, the fitting roller 4 is constructed in such a way that each elastic element 1a is firmly held during rotation of the fitting roller 4. This is achieved by a fitting roller 4 configured with a pressure reducing device (not shown) and by its surface provided with a number of through-openings (not shown) capable of forming a reduced pressure inside the fitting roller 4. Can be done. By virtue of the through opening, this reduced pressure acts on the elastic element 1a running along the mating roller 4, so that this elastic element 1a can be held firmly during rotation.

  As an alternative to, or as a complement to, the pressure reducing device described above, the peripheral surface of the mating roller 4 can be provided with a retaining coating of material having a high friction. In this way, the holding force acting on each elastic element advanced by the fitting roller 4 is increased.

The arrangement according to the invention further comprises an additional roller in the form of a gripping roller 5, which is arranged directly adjacent to the mating roller 4. As the mating roll 4, the grip roller 5 is also rotatably disposed, further mating roll 4 substantially the same speed V _1, but rotated in the opposite direction of rotation. Like the fitting roller 4, the gripping roller 5 can be provided with a decompression device, if appropriate with a high friction coating. In this way, each elastic element is firmly fixed on the gripping roller 5 during its advancement. Preferably, the gripping roller 5 is arranged with a higher holding effect on the peripheral surface than the fitting roller 4. The mating roller 4 can have a somewhat lower frictional force, which allows the elastic material to slip when the elastic material is advanced by the mating roller 4, while the gripping roller 5 has a respective elastic force. High friction and high holding force acting on the elements 1a, 1b, 1c.

Mating roll 4 and the gripping roller 5 can be established to form together a first roller device, that the first roller unit to advance elastic elements 1a, 1b, and 1c in a first scheduled speed V ₁ With the goal.

There is another roller device in the form of a laminating roller 6 directly adjacent to the gripping roller 5. The laminating roller 6 rotates in the opposite direction to the gripping roller 5 and has an ambient speed V ₂ that is faster than the corresponding speed V ₁ of the gripping roller 5. Preferably, the relationship between the two speeds V ₂ and V ₁ is V ₂ / V ₁ = 2, but the invention is not limited to this speed ratio. The selection of a suitable speed ratio V ₂ / V ₁ depends, for example, on which elastic material is used and the desired elongation of the elastic material.

  Between the gripping roller 5 and the laminating roller 6, a material web 7, i.e. a continuous web of material intended to be fitted with elastic elements 1a, 1b, 1c, is fed. Since the arrangement according to the invention is intended for use in the manufacture of absorbent products, the underlying material web 7 is preferably constituted by a non-woven material, which is intended to constitute the material layer of the finished article. Is done. Each elastic element and the underlying material web 7 thus meet between the gripping roller 5 and the laminating roller 6. The elastic elements 1a, 1b, 1c can then be attached to the material web 7 by being coated with a suitable adhesive before the material web 7 is fed past the gripping roller 5. This is possible by means of an adhesive bay 8, which is then placed along the material web 7 at a suitable point, precisely speaking before it meets the elastic elements 1a, 1b, 1c. Adhesion is realized in a suitable pattern, for example in the form of a strand of adhesive, the position of which is synchronized with the position of each elastic element 1a, 1b, 1c.

  In order for the elastic elements 1a, 1b, 1c to be able to be attached to the material web 7, the laminating roller 6 is arranged at a distance d from the gripping roller 5 which is smaller than the combined thickness of the elastic elements and the material web. Said elastic element and material web 7 can be squeezed together as a result of which the laminating roller 6 forms a contact surface where each elastic element and material web 7 meet.

As a result of the speed difference that exists between the gripping roller 5 and the laminating roller 6 and by a suitably selected distance d between the gripping roller 5 and the laminating roller 6, each elastic element 1a, 1b, 1c is Elongation is obtained in the material of each elastic element 1a, 1b, 1c when applied between the laminating rollers 6 and passing through. This elongation interacts with the effect of the adhesive applied in such a way that the elastic elements are applied and secured to the material web 7 in their stretched state. Accordingly, the present invention is based on the principle that the speed V ₂ of the laminating roller 6 is faster than the speed V ₁ of the gripping roller. In this way, the elastic material is stretched as it is advanced and adheres to the adhesive on the material web 7. A further important feature of the present invention is between the abutment surface formed by the laminating roller 6 and the point on the gripping roller 5 where each elastic element 1a, 1b, 1c meets the material web 7 and is glued in place. With respect to the distance d being chosen such that the desired clamping of each elastic element to the material web 7 is obtained, it gives good adhesion. The selection of the distance d is in this case the dimensions and the remaining properties of the elastic elements 1a, 1b, 1c and the underlying material web 7, the adhesive used in the adhesive bay 8 and the gap between the laminating roller 6 and the gripping roller 5 Matched to the speed difference. In the usual case, the distance d can be selected on the order of 0.1-1 mm, but other measurements can also be used within the scope of the present invention. With proper matching of various inherent parameters and dimensions, the elongation of each elastic element 1a, 1b, 1c is obtained, which can reach 100% of its normal length. In some cases, a fairly large degree of elongation can be achieved, precisely up to about 300% of the normal unstretched length of each elastic element. The achievable elongation depends, for example, on the elasticity of the material involved.

  FIG. 2 shows an example of how a large number of elastic elements 1 a, 1 b, 1 c, 1 d, 1 e, 1 f can be applied to the material web 7. According to the side view shown in FIG. 1, it can be seen how a single longitudinal row of elastic elements 1a, 1b, 1c is applied to the material web 7. FIG. However, the present invention can be utilized such that multiple strips of elastic elements are advanced side by side and thus they run substantially parallel and are applied to the material web 7 as shown in FIG. . After the elastic elements 1a, 1b, 1c, 1d, 1e, 1f are applied, any further material layers and components can be attached so that a longitudinal continuous web is formed. This web is then cut into separate absorbent articles by a crossing machine (not shown). This is symbolically indicated by the dashed line in FIG.

Figures 3a and 3b show on an enlarged scale how the elastic element 1a is applied to the material web 7 according to the invention. 3a and 3b correspond to the examples apparent from FIGS. As described above, the distance d between the contact surface defined by the laminating roller 6 and the gripping roller 5 is considered to be smaller than the total thickness of the elastic element 1a and the material web 7 in the non-operating state. When the elastic element 1a is supplied where the gripping roller 5 is closest to the laminating roller 6, the front end area of the elastic element 1a will be compressed. Further, since the speed V ₂ of the laminating roller 6 is faster than the speed V ₁ of the gripping roller 5, the elongation of the elastic element 1a is obtained in its longitudinal direction. It should be noted that this is evident from FIG. 3b and in connection therewith the elastic element 1a is fixed to the material web 7 as a result of a prior application of an amount of adhesive 9 to the material web 7.

An alternative embodiment of the present invention is shown in FIG. This example corresponds in large part to the above description with reference to FIG. 1, but based on the elastic elements 1a, 1b, 1c and the underlying material web 7 being joined together by ultrasonic welding instead of gluing. . For this purpose, an ultrasonic horn 10 is placed where each elastic element 1 a, 1 b, 1 c meets the material web 7. Ultrasonic welding is a technique known per se, which can be used according to the invention to join the elastic elements 1a, 1b, 1c together to the material web 7 together. In another method, the system according to FIG. 4 includes a cutting roller 3 and a mating roller 4 having configurations and functions corresponding to those described above with reference to FIG. The system further comprises a second gripping roller 5 ', which substantially corresponds to the gripping roller according to FIG. 1, which is configured with a relief pattern on its peripheral surface. This pattern here constitutes a welding pattern when the material web 7 is laminated to each elastic element and ultrasonically welded. This stage is realized by feeding the material web 7 onto the two feed rollers 11, 12 so that the material web 7 passes through the ultrasonic horn 10. This supply is realized in such a way that the material web 7 is supplied at a speed V ₂ which is faster than the speed V _{1 of} the second gripping roller 5 ′. As explained previously, and because the upper active surface 10a of the ultrasonic horn 10 forms an abutment surface, each elastic element will be applied to the material web in its stretched state. Preferably, no adhesive is used in this example.

FIG. 5 shows, on an enlarged scale, how the elastic element 1a is applied to the material web 7 according to the example apparent from FIG. Again, the distance d between the gripping roller 5 ′ and the abutment surface 9 a defined by the ultrasonic horn is smaller than the total thickness of the elastic element 1 a and the material web 7 in the non-actuated state. In normal application, the distance d is considerably smaller in the example based on ultrasonic welding than if the application method is based on adhesion (see FIG. 1). It can be noted that the surface of the gripping roller 5 'preferably has a relief pattern to enable ultrasonic welding as described above. While gripping roller 5 'has a peripheral speed V _1, the material web 7 has a speed V _2, the latter is obtained by advancing the use of two feed rollers 11 and 12 (see FIG. 4). When the elastic element 1a is supplied where the gripping roller 5 'is closest to the abutment surface, the elastic element 1a will be somewhat stretched. By analogy with what has been described above, the resulting elongation based on the speed V ₂ of the material web 7 is higher than the speed V ₁ of the gripping roll 5 'when the elastic element 1a is applied.

  The example shown in FIGS. 4 and 5 includes a stationary ultrasonic horn. Within the scope of the present invention, a rotating ultrasonic horn can be used. This type of rotating ultrasonic horn is known per se and will not be described in detail here. However, it can be stated that the rotating ultrasonic horn must then be placed under the material web 7 described above at a position substantially corresponding to the position of the stationary ultrasonic horn 10 according to FIG.

According to a further example of the invention, the elongation of each elastic element is realized in two separate steps. According to this example, the mating roller 4 (see eg FIG. 1) is driven at an ambient speed V ₃ which is slower than the speed V ₁ of the gripping roller 5, so that the initial extension of each elastic element is advanced into the material web 7. Even before it is realized. Thereafter, additional steps from the grip roller 5 by the speed V ₂ of the fast laminating roller 6 than the speed V ₁ of the gripping roller 5 as described before including the continued growth of the elastic element in the transition to the lamination roller 6 is performed The In this way, a higher elastic element elongation than that described above with reference to FIG. 1 is achieved. Two separately realized elongation principles can also be applied to the system shown in FIG. This is realized here by the second gripping roller 5 ′ being given an ambient speed V ₁ that is faster than the speed V ₃ of the fitting roller 4. In this example as well, an opportunity for high elongation of each elastic element 1a, 1b, 1c is given here.

  The present invention creates an arrangement and method for applying elastic elements, which has a simple structure, which allows for the effective production of absorbent products, where material consumption can be limited. Furthermore, an attractive appearance of the finished article manufactured according to the present invention is obtained.

  According to a further example of the invention, the gripping roller can be omitted. If the mating roller is provided with a surface having a suitably matched friction, then a certain amount of slip is obtained with respect to the web of elastic material when the web of elastic material is fed against the mating roller. At the same time, the gripping roller can be omitted if it has sufficient holding capacity for the elastic element whose surface has been cut. This means that the underlying material web 7 is arranged adjacent to the mating roller instead of the gripping roller. The elongation of the elastic element is obtained here by utilizing a higher speed in the material web than in the mating roller.

  As mentioned above, the present invention can be utilized in connection with the manufacture of absorbent products such as sanitary napkins, panty liners, incontinence pads or diapers. To be precise, the present invention is used here to apply the elastic element described above in the manufacture of the absorbent product. In an essentially known manner, this type of absorbent product is preferably composed of a plurality of layers including a first layer in the form of a surface layer, a second layer in the form of a back layer and a third layer in the form of an intermediate absorbent layer. It is made up.

  The backing layer preferably blocks liquid and then preferably consists of a liquid impermeable material. Although a thin liquid-tight plastic film is suitable for this purpose, it is also possible to use a material that is initially liquid permeable but provided with a coating of plastic resin or other liquid-tight material. Thereby liquid leakage from the underside of the absorbent product is prevented. The backing layer can consist of any material that meets the liquid impermeability criteria and is sufficiently flexible and skin friendly for this purpose. Examples of materials suitable for the back layer are plastic films, nonwoven fabrics and laminates thereof. The plastic film can be made, for example, from polyethylene, polypropylene or polyester.

  The backing layer can alternatively consist of a laminate of a plastic layer facing the absorbent body and a nonwoven fabric facing the user's undergarment. Such a configuration provides a leak-proof backing layer that has a tactile feel. The backing layer can also be composed of a vapor permeable material. This type of breathable backing can be made, for example, from a so-called SMS material (spunbond-meltblown-spunbond) or a breathable plastic film made of polyethylene. Such plastic films are described in EP 283200. In order to retain breathability even when the material is applied to the article, the underside of the absorbent product should not be entirely covered by securing means. Other conventional breathable materials can also be utilized as the back layer.

  The surface layer of the absorbent product can be made from any conventional material, such as a nonwoven fabric, a perforated plastic film, or a laminate of a perforated plastic film and a non-woven material. Therefore, the surface layer is preferably configured to have liquid permeability.

  The absorbent body of the absorbent product is preferably made from one or more layers of cellulose pulp. Pulp can be originally present in rolls, veils or sheets, which in production of the product are dried and disaggregated and converted to a pulp mat in a fuzzy form, sometimes absorbing so-called superabsorbents (multiple times their own weight of water or body fluids) Polymer having the ability to be added and mixed. An alternative to this is to dry form the pulp mat as described in WO 94/10956. Examples of other usable absorbent materials are various types of natural fibers such as cotton wool fibers, peat. Of course, absorbent synthetic fibers, or in the case of absorption, particles of superabsorbent polymer material of the type that chemically bond to a large amount of liquid to form a liquid-containing gel, or a mixture of natural and synthetic fibers can be utilized. The absorbent body can further comprise additional components such as form stabilizing members, liquid dispersing members, or binders such as thermoplastic fibers that have been heat treated to hold the short fibers and particles together into agglomerated units. . Various types of absorbent foam materials can also be used in the absorbent body.

  For fixing the absorbent product, a fixing means can be attached to the underside of the absorbent product. This may be advantageous when the absorbent product is constituted by a sanitary napkin, panty liner or incontinence pad, for example. The fixing means is preferably made of an adhesive, but may be mechanical fixing such as Velcro fixing, snap fixing, friction lining, and clamp member. The adhesive can be applied in one or more strands or other patterns. Alternatively, the entire underside of the absorbent product is adhesive coated. It is also possible to use a fixing adhesive that is breathable and to apply it over the entire underside of the product to act as a combined barrier layer and fixing means. Attached to the fixing means is a protective layer. The protective layer is preferably silicone-treated paper, but other types of protective layers are also possible, such as wax paper, embossed or release-treated plastic films, fiber strips for fixing to velcro fixing, etc. It is.

  According to the present invention, there is provided an arrangement and method for applying an elastic element on an absorbent element, more precisely an arrangement and method when the elastic element is stretched and applied during the manufacturing process of the absorbent product. Provided. This is also described above with reference to FIG.

  The invention is not limited to the examples described above but may vary within the scope of the claims. For example, various types of elastic elements can be utilized, such as wires, bands, strips, etc. made from a suitable ductile material such as foam material. The described material web can be made from a non-woven material, but plastic films made from other materials such as polyethylene, polypropylene or polyester are also conceivable. Alternatively, material webs made from laminated materials can be used within the scope of the present invention.

1 shows a basic side view of an arrangement for applying an elastic element according to a first example of the invention. FIG. 1 is a schematic and somewhat simplified perspective view showing a material web having a number of applied elastic elements. FIG. FIG. 3a shows in enlarged form the first step of the method for applying the elastic element. FIG. 3b shows in enlarged form the second step of the method for applying the elastic element. Fig. 4 shows a basic side view of an arrangement for applying an elastic element according to a second example of the invention. 2 shows in a magnified manner the method for applying an elastic element according to the second example.

Claims (16)

An arrangement for applying the elastic element (1a, 1b, 1c) to the continuous material web (7), wherein the elastic element (1a, 1b, 1c) is continuously moved from the next to the first predetermined speed ( A first roller device (4, 5; 4, 5 ′) for advancing at V ₁ ) and a second roller device (6) for advancing the material web (7) at a second predetermined speed (V ₂ ) 11, 12), wherein the second speed (V ₂ ) is faster than the first speed (V ₁ ), and the arrangement includes the elastic elements (1 a, 1 b, 1 c) and the material web ( 7) comprising an abutment surface (6; 10a) arranged at a distance (d) from the first roller device (4, 5; 4, 5 ') smaller than the combined thickness of 7), the elastic element (1a, 1b, 1c) is the first row Device (4,5; 4,5 ') and said abutment surface; arrangement, wherein the is that achieved when passing between the (6 10a).   The first roller when the abutment surface (6) is defined by the peripheral surface of the second roller device (6) and the material web (7) is applied with the elastic elements (1a, 1b, 1c) Arrangement according to claim 1, characterized in that it is guided with the elastic elements (1a, 1b, 1c) between a device (4, 5) and the second roller device (6).   The adhesive bay (8) for applying an adhesive to the material web (7) before the elastic element (1a, 1b, 1c) is applied to the material web (7). 2. The arrangement according to 2.   Said abutment surface (10a) is defined by the surface of an ultrasonic horn (10), which faces said first roller device (4; 5 '), and said elastic elements (1a, 1b, 1c) and said Arrangement according to claim 1, characterized in that it is arranged to join the material webs (7) together.   The arrangement according to claim 4, wherein the ultrasonic horn is arranged to rotate.   The first roller device (4, 5; 4, 5 ') is provided for each elastic element (1a, 1b, 1c) along the peripheral surface of the first roller device (4, 5; 4, 5'). 6. Arrangement according to any of claims 1 to 5, characterized in that it is provided with means for generating a holding effect.   7. Arrangement according to claim 6, characterized in that said means comprise a decompression device.   Said means comprise a coating on the peripheral surface of said first roller device (4,5; 4,5 '), said coating being said elastic element (1a, 1b, 1c) being said first roller device (4,5). 8. Arrangement according to claim 6 or 7, characterized in that it has a sufficiently high friction to hold the elastic element (1a, 1b, 1c) when advanced by 4,5 ').   The first roller device (4, 5; 4, 5 ') includes a fitting roller (4) and a gripping roller (5; 5') adjacent to each other, and each elastic element (1a, 1b, 1c) Arrangement according to any of the preceding claims, characterized in that it is advanced on the fitting roller (4) and then on the gripping roller (5; 5 '). The arrangement according to claim 9, characterized in that the fitting roller is driven said at a speed of gripping rollers (V ₁₎ slower speed (V _3).   Arrangement according to any of the preceding claims, characterized in that it comprises a cutting device (3) for cutting a continuous web (1) of elastic material into the elastic elements (1a, 1b, 1c).   12. Arrangement according to claim 11, characterized in that the cutting device (3) comprises a cutting roller (3) adjacent to the first roller device (4, 5; 4, 5 '). A method for applying an elastic element (1a, 1b, 1c) to a continuous material web (7), comprising:
The elastic elements (1a, 1b, 1c) are continuously advanced from the next to the next at the first predetermined speed (V ₁ ),
In the method comprising advancing said web of material (7) in a second scheduled speed (V _2),
Advancing the material web (7) such that the second speed (V ₂ ) is faster than the first speed (V ₁ );
The distance between the elastic elements (1a, 1b, 1c) and the material web (7) is less than the combined thickness and is located at a distance (d) from the first roller device (4, 5; 4, 5 '). The elastic element (1a, 1b, 1c) is supplied between the contact surface (6; 10a) and the roller device (4, 5; 4, 5 ′), and the longitudinal direction of the elastic element (1a, 1b, 1c) A method comprising obtaining an elongation in a direction.   14. The method according to claim 13, comprising applying an adhesive to the material web (7) before applying the elastic element (1a, 1b, 1c).   15. A method according to claim 13 or 14, comprising cutting a continuous web (1) of elastic material into the elastic elements (1a, 1b, 1c).   An absorbent product, such as a sanitary napkin, panty liner, incontinence pad, diaper, etc., comprising at least one backing layer, surface layer, intermediate absorbent layer and at least one elastic element, wherein said elastic element is applied to said absorbent product An absorbent product, characterized in that the elongation of the elastic element is realized by the arrangement according to any of claims 1 to 12 or by the method according to any of claims 13 to 15.

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