EP3160727A1

EP3160727A1 - Device and method for producing flat products

Info

Publication number: EP3160727A1
Application number: EP15730767.9A
Authority: EP
Inventors: Guido BRÖCKER; Lutz Klingauf
Original assignee: Metsa Tissue Oyj
Current assignee: Metsa Tissue Oyj
Priority date: 2014-06-27
Filing date: 2015-06-19
Publication date: 2017-05-03
Anticipated expiration: 2035-06-19
Also published as: WO2015197489A1; EP3160727B1; PL3160727T3; DE102014009320A1

Abstract

The aim of the invention is to provide a device for producing flat products, in particular flat products made of tissue and/or tissue-like materials, with which optically well-contoured embossing patterns can be achieved. This is achieved by a device comprising a first embossing roller, which comprises at least one first and one second embossing elevation. The first embossing elevation has a height h₁, and the second embossing elevation has a height h₂, h₁ and h₂ being different. The device further comprises a second embossing roller, which comprises at least one third and one fourth embossing elevation. The third embossing elevation has a height h₃, and the fourth embossing elevation has a height h₄, h₃ and h₄ being different. The first and second embossing rollers are paired with each other such that the first embossing elevation is paired with the fourth embossing elevation and the second embossing elevation is paired with the third embossing elevation at least in sub-regions of the embossing rollers.

Description

DEVICE AND METHOD FOR THE PRODUCTION OF

AREA PRODUCTS

The present invention relates to a device for the production of surface products, in particular from tissue and / or tissue-like materials, and to a method for producing such surface products using the device according to the invention as well as a surface product produced with the inventive

Device or the inventive method and its use. Methods and devices for the production of surface products, in particular of tissue and / or tissue-like materials, are widely known from the prior art. For example, DE 699 31 631 T2 discloses a device with which a three-ply absorbent paper product can be produced. There will be two

Roll pairs, each consisting of an embossing roller and a smooth or

Gummigegenwalze used, wherein the embossing rollers have embossing surveys on which a glue can be applied by means of a gluing unit. The embossing elevations of both rolls are essentially the same height. The device produced by means of the device

Paper product has a connection "TIP-to-TIP", that is, over top surfaces of at least partially oppositely arranged embossing points, generated by corresponding embossing elevations on the embossing rollers, wherein a synchronization of the embossing rollers takes place. Here, a middle layer is provided without any embossing. By means of there

In the disclosed apparatus, a paper product is produced, which should simultaneously provide a necessary softness and thickness. EP 1 619 01 5 B1 discloses a multi-layer surface product with which the object is to be achieved of settling a colored embossed pattern on this ink more strongly in terms of contrast. This object is achieved in that at least one layer on the back or front side of the surface product for contrast enhancement of the colored embossing pattern with respect to the forming the front or back of the surface product layer is colored similar or the same as the position of the adhesive position taking adhesive. It can also a layer connection between individual layers by the method "TIP-to-TIP" done.

It is desirable to provide a sheet product, particularly of a tissue and / or tissue-like material, which has a good optical effect.

For the purposes of the present invention, tissue is understood to mean a product which corresponds to DIN 6730. Accordingly, tissue is a product, which and a

surface mass of about 10 g / m ² to about 50 g / m ² , based on a single-layer material.

For the purposes of the present invention, a tissue-like material is understood as meaning material which, in contrast to tissue material, is changed by changes in the tissue

Drying process is produced. As starting material for the production of tissue and / or tissue-like material, e.g. Pulp, wood, waste paper, bamboo and / or straw are used.

For the purposes of the present invention, the surface product is one or more layers

formed, and may be made of tissue, tissue-like material, cotton fibers and / or non-woven materials and combinations thereof. For the purposes of the present invention, nonwoven materials are understood in particular to mean those which are produced from natural fibers, preferably from paper fibers, and / or synthetic fibers. The synthetic fibers used are preferably polymeric fibers and / or combinations of natural-like or synthetic fibers.

Object of the present invention is to provide a device, a method and a surface product available, which qualitatively and optically has a good effect. This object is achieved by a device for producing sheet products comprising a first embossing roller, comprising at least a first embossment elevation and a second embossment elevation, wherein the first embossment elevation h and the second embossment elevation has a height h ₂ , wherein h and h ₂ different are, further comprising a second embossing roller comprising at least a third and a fourth embossment elevation, wherein the third embossment elevation has a height h ₃ and a fourth embossment elevation a height h ₄ , wherein h ₃ and h _{4 are} different, and wherein the first and second Embossing roller are associated with each other such that at least in

The first embossing survey of the fourth embossing survey and the second embossing survey of the third embossing survey are assigned to subsections thereof. The device according to the invention is particularly suitable for producing two-, three-, four-, five-, six- or multi-ply surface products of tissue and / or tissue-like materials, as defined above. These can be used, for example, as toilet paper,

Kitchen paper, handkerchief and paper towel, but also as a cleaning cloth,

Facial tissue, liner, pad or napkin. But other possible uses are not excluded. In addition, the device according to the invention may also include further embossing rollers, smooth rollers associated therewith, also called rubber dough rollers, gluing units, connecting rollers, etc., and in particular also one

Pre-embossing unit, with which webs of surface products before being fed to a gap formed between the first embossing roller and the second embossing roller can be machined. The surface products to be supplied to the first embossing roll and the second embossing roll are preferably designed in the form of webs and may be single-layered or multi-layered, and in particular also pre-embossed, but also unembossed. For example, in a pre-embossing unit of the device according to the invention, single-layer webs can be provided with a micro-embossing and then the associated first and second

Embossing rollers are supplied. It is also possible that in a Vorprägeeinheit the device according to the invention, for example, a two-ply surface product in

Web form is formed, wherein the two layers "TIP-to-TIP" or in the so-called "nested" compound, also each unsynchronized generated. Unsynchronized means that, for example, in the "TIP-to-TIP" method, not every head face of a Embossing elevation of an embossing roll is assigned to exactly one head face of a stamping elevation of the associated embossing roll, but that an offset can occur here in the machine direction, thus still one of the head face of a embossing elevation of a first embossing roll faces a part of a head face of a embossing elevation, a second embossing roll over which one embossing elevation Connection of the webs takes place at least in parts.

The basis weight of a single layer is preferably in a range of about 6 g / m ² to 100 g / m ² , preferably in a range of about 9 g / m ² to about 35 g / m ² , and the weight per unit area of the device produced by the device according to the invention

Surface product is advantageously in a range of about 15g / m ² to 400g / m ² , more preferably in a range of about 30g / m ² to about 200g / m ² .

The inventive device is characterized in particular by the fact that due to the assignment of the first embossing roll to the second embossing roll to form in particular a gap between them ultimately a "TIP-to-TIP" connection takes place, wherein the opposing embossing surveys a different height h to h ₄ , measured from a base of the first and second embossing rollers, respectively, with pairs of the embossing projections being formed, namely, a pair through the first embossment elevation and fourth embossment elevation, once a pair through the second embossment elevation, and the third embossment elevation. If, for example, the height h is greater than the height h ₂ , the height h _{4 of} the fourth embossment elevation assigned to the height h of the first embossment elevation is smaller than the height h. Conversely, the height h _{3 of} the third embossment elevation is greater than the height h ₄ and thus greater than the height h _{2 of} the second embossment elevation. Ultimately, at least in partial areas of the surfaces of the first embossing roll and the second embossing roll complementary embossing surveys are provided with different heights available. As a result, it is advantageously possible to arrange embossing elevations of the first embossing roll and those of the second embossing roll, for example one colored glue at least partially over their top surfaces, so that a two-color surface product with a cleanly structured or clear pattern is made available becomes. According to the invention, it can also be provided that there is another pair of embossing elevations with heights which differ from those of the two other pairs, but otherwise preferably have an overall height of the embossing elevations corresponding to the total height of the other two pairs of embossing elevations. As a result, further optical effects can be produced, for example, in the case of an arrangement of such third pairs of embossing elevations around a pair of embossing elevations which emboss a decorative pattern, for example an animal or floral motif. Then, in particular, a contrast enhancement can be generated around the decor pattern by the third pair, in which case heights of the embossing elevations forming the third pair lie between those of the first and second or third and fourth embossing elevations.

Preferably, the subregions of the embossing rolls form the first and fourth

Embossing surveys and the second and third embossing surveys an entire embossing surface of the embossing rollers. In addition, third pairs of embossing elevations, as described above, or else omissions, or non-embossing embossing elevations, ie those which do not have the same overall height as those embossing elevation pairs and in particular spaced from each other with respect to their top surfaces, may be provided. The embossing rollers preferably have distributed over the entire embossing surface on said subregions. In particular, the first to fourth embossing elevations forming these, which preferably form micro- and / or decorative embossing patterns, are distributed over the entire width of the embossing surface of the embossing rolls. Subareas with embossing elevations which produce a microembossing preferably predominate in their total area those subregions with embossing elevations which form a macro embossing. The subregions are particularly preferably designed in such a way that the subarea formed by the one pair of embossing elevations over the entire width of the embossing surface of the embossing rollers generates a background element in the form of a microembossing, in which at least one macro embossing in at least two subareas with the further pair of embossing elevations Form of a decorative pattern is introduced. The first embossing roll and the second embossing roll can also have omissions between embossing elevations in further subregions of the surfaces thereof, in which embossing elevations are not arranged. It is also possible that further embossing elevations are provided, which have an identical height, measured starting from the base of the respective embossing roll, in further subregions of the first embossing roll and second embossing roll. In this case, the embossing surveys can also be designed such that the opposing top surfaces do not come into contact and in particular are not provided with glue. Particularly preferably, the first embossing elevations and fourth embossing elevations as well as the second embossing elevations and third embossing elevations with the heights h to h _{4 are} assigned such that a uniform gap is formed between them. Of the

The gap distance is preferably in a range of about 0.5 / 100 mm to about 40/100 mm, more preferably in a range of about 1/100 mm to about 1 5/100 mm, even more preferably in a range of about 1 / 100 mm to about 5/100 mm.

For the purposes of the present invention, it may be provided, for example, that the first embossing elevations have a height h of 1,300 μm, measured from a base of the first embossing roll, and the fourth embossing elevations associated therewith have a height h ₄ of approximately 700 μm. Then, for example, be provided that the second embossing elevations of the first embossing roll have a height h ₂ of about 700 μηι, and the third embossing elevations h ₃ of about 1 300 μηι, each also measured from the bottom, but now the second embossing roll. However, the respective embossing survey pairs may also have different heights. For the purposes of the present invention, the first embossment elevation and the third embossment elevation have a height h and h ₃ in a range from about 600 μm to about 2000 μm, measured from a base of the first embossing roller or base of the second embossing roller, the abovementioned Range preferably in a range of about 800 μ to about 1800 μηι, even more preferably in a range of about 1000 μηι to about 1 600 μηι. For the purposes of the present invention, the second embossment elevation and the fourth embossment elevation have a height h ₂ and h ₄ in one area from about 400 μηι to about 1600 μηι measured from a base of the first embossing roller or base of the second embossing roll, said area preferably between about 600 μηι to about 1400 μηι, even more preferably in a range of about 700 μπι to about 1200 μηι lies.

Thus, in the sense of the present invention, for example, the first embossment elevation h have a height h of about 1400 μηι and the fourth embossment elevation h ₄ of about 600 μηι, and the second embossment elevation h ₂ of about 800 μηι and the third embossment elevation a height h ₃ of about 1200 μηι. But also any other combination of the heights is possible, as far as embossment elevation pairs are formed in the sense of the above, wherein the heights h and h ₂ or h ₃ and h _{4 of} the first and second embossment elevation and third and fourth embossment elevation are just different, and preferably the first and fourth embossing elevations together have an overall height which is identical to the total height of the second and third embossing elevations, in the above example therefore 2000 μm.

Instead of a tissue or tissue-like material it is also possible to use a non-woven material, also referred to as non-woven material, which can be produced in any conceivable manner, for example in the airlaid method or with wet-laid techniques. The nonwoven material may consist of natural fibers, such as cellulose or cotton fibers, but also of plastic fibers such as polyethylene or polypropylene fibers. With regard to the usable materials, reference should be made in particular to EP 1 61 9 01 5 B1, paragraph 8, which is hereby fully made the subject of the present application.

The webs fed to the first embossing roll and the second embossing roll can not only be embossed and microembossed, but can also be embossed or knurled, needled or otherwise structurally pretreated in some other way. They can also be provided with surface-altering agents, or with lotions or balm. Preferably, top surfaces of the first and fourth embossment elevations and of the second and third emboss elevations are arranged substantially opposite one another. As far as the

Head surfaces are the same size, these are more preferably substantially exactly associated with each other. For the purposes of the present invention, the term "essentially" and "approximately" is to be understood as meaning that the values or dimensioning related to them are not more than +

1-20%, preferably not more than +/- 10%, more preferably not more than +/- 5%, differ from each other. The top surfaces of the first and fourth embossing elevation and the second and third embossing elevation need not fully correspond in their dimensions. For example, the dimensioning of the top surface of the first and the second embossing elevation may be different, for example, they may have a smaller diameter than those of the third and fourth embossing elevation. Preferably, it is provided in such a case that the top surfaces of the first and the second

Embossing survey are assigned to the third and fourth embossing surveys that their top surfaces are arranged within the top surfaces of the third and fourth embossing elevation, or vice versa. However, it can also be provided in the sense of the present invention that the assignment of the top surfaces of the first and the fourth embossing elevation on the one hand and the second and third embossing elevation on the other hand is such that they are not arranged exactly or substantially opposite, but it can also Offset of more than 10%, preferably more than 20%, more preferably more than 30%, even more preferably more than 40% or 50%, are present, if it is only ensured that at least partial area of the respective head surfaces

are arranged opposite each other, so that in particular after the gluing then also a connection can be made.

Advantageously, the device according to the invention comprises a first smooth roll assigned to the first embossing roll, which also acts as counter-roll, in particular as

Gummigegenwalze can be addressed. More preferably, the

Device according to the invention a second smooth roller, the second embossing roller is assigned, wherein the second smooth roll as counter-roll, in particular as

Gummigegenwalze can be addressed.

Further advantageously, the device according to the invention comprises a first gluing unit, which is associated with the first embossing roller. More preferably, the device according to the invention comprises a second gluing unit, which is associated with the second embossing roller. The first gluing unit and the second gluing unit each have a first glue application roller or a second glue application roller with which glue can be transferred to the embossing elevations of the first embossing roller and the second embossing roller. Here are the two

Application rollers set according to the invention such that a glue application preferably takes place exclusively on those embossing surveys, which have a greater height. In the example given further above, this can be, for example, the first embossment elevation with a height h and the third emboss elevation of the second embossing roll with a height h ₃ . The glue can be colorless or colored. Particularly preferred in the context of the present invention is that the first gluing unit and the second gluing unit are loaded with glue of different colors. Then, according to the invention, two-color surface products can be made available with clearly contoured embossing patterns, caused by the respective embossing elevation pairs formed by the first embossing roll and the second embossing roll. Alternatively or cumulatively, instead of a glue, a gluing unit or an alternative device, for example a

Printing device, paint applied. By way of example, the first embossing roller is a first gluing unit for applying a transparent glue, and the second embossing roller is associated with a device, which can be, for example, a gluing unit, for application of paint.

According to the invention, the first embossing roll and / or second embossing roll comprises omissions without embossing elevations. These omissions are preferably arranged in partial regions on the first embossing roller and / or second embossing roller. In order to emphasize emboss patterns, omissions are provided particularly in an area around macroembossing patterns, so that the macro emboss patterns are more prominent. The Makroprägemuster may for example be one which has a linear or circular shape or has another figurative shape, or combination of

Macro embossed patterns. For example, macroembossing patterns may be in the shape of a cloud or sheep, flower or other motif. The macro embossing patterns are produced, for example, by linear embossing embossments.

For example, the embossment elevation pair of the first and fourth embossment elevations can each be designed in the form of a line to form the macroemboss pattern.

As far as omissions are provided, these are preferably arranged around the pair of those embossment elevations which generates a macro motif, in particular a decorative pattern. The omissions have a width of one to five, preferably to three,

Milling elevation rows formed by the further pair of mash elevations forming a micro-embossing pattern. This will make the macro theme more prominent. Also, the area of the macro motif is less stiff or brettig formed. The omissions can be defined by removed or by embossing surveys with a lower height than that of the first to fourth embossing surveys, which then no

form a complementary pair, in particular a same total height of the embossing surveys. A similar optical effect can be achieved when around the pair of

Embossing surveys, which form at least one macromotive, another third pair of embossing surveys is arranged, which, as already described above, a

Contrast enhancement, especially in Providence colored glue only in the area of the macro motive forming embossing surveys produce.

The embossing projections provided on the first embossing roll or second embossing roll may have all the geometric shapes. These may be formed, for example, truncated pyramidal or frusto-conical, and may for example be formed linearly to form macroembossings. But also other large-scale forms are possible depending on the desired macro motive. The top surface of the respective embossing survey is at least 0.05 mm ² . In particular, a partial surface of the top surface of associated first and fourth embossing elevation or Π second and third embossing bumps is at least 0.05 mm ² , and lies

advantageously in a range of about 0.06 mm ² to about 5 mm ^2, preferably about 0.1 mm ² to about 0.3 mm ² , the latter range preferably in a microembossing. A

Micro-embossing in the sense of this invention is a small dot

Background embossing in the formed surface product, in particular by

Embossing surveys with a small head surface, as described above, are generated. Starting from the respective bottom of the first embossing roller and the second embossing roller, the embossing projections may be formed at an opening angle of about 5 degrees to about 85 degrees, advantageously at an angle in a range of about 30 degrees to about 80 degrees. The side surfaces of the embossing elevations need not be identical, and also do not have an identical opening or flank angle, but may also be different, in particular asymmetric. For the purposes of the present invention, all embossing elevations which are arranged on the surface of the first and / or second embossing roll are particularly conical or truncated with respect to the side surfaces, preferably symmetrically in the shape of truncated or truncated pyramids, ie. also with identical ones

Flank angles. If line-shaped embossing elevations are used to produce patterns in plan view, then these are preferred in cross-section

truncated pyramidal or frustoconical. Also in this

Embodiment, the flank angles may be the same or different. Line-shaped embossment elevations preferably have a head surface which is widened in comparison with the top surfaces of pyramid-shaped and / or frustoconical embossing elevations. This widened head surface is preferably formed about 2 times or 5 times wider than in the case of conical and / or truncated pyramidal embossing elevations, based on a

Cross section through this.

The present invention further relates to a process for the preparation of

Surface products as described above using the device according to the invention with a first embossing roller, comprising at least a first and a second embossment elevation, wherein the first embossment elevation a height h and the second embossment elevation has a height h ₂ , where h and h _{2 are} different, and with a second one

An embossing roller comprising at least a third and a fourth embossment elevation, the third embossment elevation having a height h ₃ and the fourth embossment elevation having a height h ₄ , the first and second embossing rollers being associated with one another such that the first embossment elevation of the fourth embossment elevation and the first embossing elevation second embossment elevation of the third embossment elevation are assigned, so that when guiding at least one first web by a gap formed between the first and the second embossing roller at least partially the first web is embossed in the area of top surfaces of the first to fourth embossing elevations. In the area of the embossing, a connection is advantageously carried out, wherein the connection is even more advantageously carried out by glue, which is applied at least in partial areas of the top surfaces, in particular those embossment elevations which have a greater height. Regarding the configuration of the embossing surveys and examples of how the device can be configured, with which the method according to the invention is carried out, are above in connection with the

given device according to the invention.

Advantageously, a first glue is applied to the first embossment elevation with the height h via a first gluing unit. Further advantageously, a second glue is applied to the third embossment elevation with the height h ₃ via a second gluing unit. Preferably, the first size and the second size are used differently colored. However, it is also possible that the glue is used colorless, or that only the first or the second glue is used colored.

In a preferred embodiment of the method according to the invention, at least one first web is guided over the first embossing roll and at least one second web is passed over the second embossing roll. Preferably, the first embossing roll and the second embossing roll and the gap formed between them, a further, third web, fed, which in turn may be single-layer, two-ply, three-ply or otherwise multi-layered. All webs or individual layers of the respective webs are unembossed, microembossed, embossed, needled, knurled or otherwise structurally prepared used. It can be provided that with the device according to the invention more than three webs of the first embossing roll and the second embossing roll in the gap between this, is supplied. In a particularly preferred embodiment of the present invention, at least one third web is introduced between the first and second webs, which third web may be formed in one, two or more layers as described above. The third web is preferably arranged between the first web and the second web by means of the surface product produced by the method according to the invention. For the purposes of the present invention, there are a variety of

Possibilities how the at least one third web, or else each further web is guided in the apparatus of the method according to the invention and in particular the gap between the first embossing roll and the second embossing roll is supplied. The possible additions here are to be selected according to the needs of the person skilled in the art and are within the usual reach of his specialist knowledge.

In a further preferred embodiment of the method according to the invention, the first embossing roll and / or second embossing roll is a connecting roll, too

Rail connection roller called assigned. In the method according to the invention, this can also be arranged by the first embossing roll and / or the second embossing roll, depending on the desired manufacture of the surface product to be produced by means of the method according to the invention and the device according to the invention.

The present invention further relates to a surface product produced by the device according to the invention as described above or

Process according to the invention as described above. The invention

Surface product is advantageously made of tissue and / or a tissue-like material. However, it may also be made of a non-woven material. The area product advantageously has a micro-embossing pattern at least in some areas, and more preferably a macro-embossing pattern in other subareas. It can, however It may also be provided that the surface product has two or more different macroembossing patterns or two or more different microembossing patterns. Advantageously, the respective embossing patterns, be they micro embossing patterns or macro embossing patterns, are highlighted in color by the use of colored glue or by color. For the purposes of the present invention, the surface product preferably has embossed patterns emphasized at least in two-color, wherein preferably one embossed pattern, which is highlighted in color, is a micro embossed pattern, and the other embossed pattern is a macro embossing pattern. In a further preferred embodiment, the at least one macro (decorative) embossed pattern is highlighted in color, while the at least one microembossing pattern is not.

The present invention furthermore relates to the use of the at least single-layer, preferably two-layer, more preferably three, four, five, six or other type

multilayer sheet product as described above as toilet paper,

Kitchen paper, handkerchief, paper towel but also cleaning cloth, tissue or as a napkin. These and other advantages of the present invention will be explained in more detail with reference to the following figures. Show it:

1 shows a schematic view of a first embodiment of the device according to the invention;

2 shows a section of the first embodiment according to FIG. 1 with a first embossing roller

12 and second embossing roller 16 with first to fourth embossing elevations;

3 is a schematic representation of the assignment of the first embossing roller 12 and the second embossing roller 16 with a gap 38;

Fig. 4: a schematic representation of the first embossing roller 1 2 and the second

Embossing roller 1 6 in the gap 38 in a web guide with a device according to FIG.

1 ;

5 shows a schematic representation of a second embodiment of the

device according to the invention; 6 shows a schematic representation of the conditions in the gap 38 in the case of a web guide with a device according to FIG. 5;

7 shows a device according to the invention in a third embodiment with a

Pre-embossing unit 90;

Fig. 8: a schematic representation of the relationships in the gap 38 between the first

Embossing roller 1 2 and second embossing roller 16 in a web guide with a device according to FIG. 7;

9: a schematic representation of a fourth embodiment of a

device according to the invention with a pre-embossing unit 90;

10 is a schematic representation of the relationships in the gap 38 between the first

Embossing roll 1 2 and second embossing roll 16 in a web guide according to the apparatus of Fig. 9;

Fig. 1 1: a plan view of a two-ply, produced by the process according to the invention surface product 80; such as

12 shows a sectional view A-A according to FIG. 11 through the two-ply surface product 80.

First of all, it should be said that the ones shown in the pictures

Embodiments are to be interpreted by way of example only and not by way of limitation.

In particular, the features described there can be combined with each other with the further features described above in the description of the present invention for further embodiments. Furthermore, it should also be noted that the specified in the description of the figures and in the claims

Reference numerals do not limit the scope of the present invention, but merely refer to the embodiments indicated in the figures. In particular, the arrangement of the first to fourth embossing elevations, as shown in the figures, only one or more of the possible configurations and arrangements thereof on the first embossing roller 1 2 and the second embossing roller 16. This also applies to the surface product 80 of FIG which may be designed in any other way, and in particular may have other macro or micro-embossing patterns. This also applies with regard to the different feeds of the different webs, in particular the first, second and third tracks 30, 32 and 34 to and in the device 10 according to the invention is in the context of the present invention is not excluded in particular that also further tracks beyond the three tracks 30, 32 and 34 are provided out and that the respective tracks not only one or two layers, but otherwise are designed as multi-layered. Also, the assignment of gluing plants is only an exemplary assignment, these can be assigned in particular in other ways the embossing rollers 12 and 16. And finally, the (rubber) counter rollers 14 and 18 or connecting rollers 20 can be turned off by the first embossing roller 12 and the second embossing roller 16, depending on what is to be obtained for a surface product, in particular which properties this should have.

FIG. 1 now shows a device according to the invention, designated overall by the reference numeral 10, in which two material webs 30 and 32, each of which has a single layer, are joined to form a surface product 80, which then has two layers. The first web 30 is fed via a Gummigegenwalze or smooth roller 14 of a first pair of rollers of a first embossing roll 12, wherein a gluing takes place via a first applicator roll 24 of a first gluing unit 22 with, for example, a colored glue. As can be seen, for example, from FIG. 2, this gluing is carried out only in areas of first embossing elevations 40 with a height h _1; which is greater than a height h _{2 of} second embossing elevations 42, which are arranged on a surface of the embossing roller 12, starting from a base 48 thereof at least in partial areas. Likewise, a supply of the single-ply material web 32 via a Gummigegenwalze or smooth roller 1 8 to a second embossing roller 16, wherein via a second glue application roller 28 of a second gluing unit 26 is a gluing with a colored or non-colored glue or an application of a color. FIG. 2 shows that the gluing takes place in the region of top surfaces of third embossing elevations 44 with a height h ₃ which is greater than a height h _{4 of} fourth embossing elevations 46, measured in each case starting from a bottom 50 of the second embossing roller 16 a gap 38 formed by assigning the first embossing roller 1 2 and the second embossing roller 16, the two material webs 30 and 32 are guided and thereby connected, in particular by the The glue is then applied through the first gluing unit 22 and the second gluing unit 26. Subsequently, the web is guided via a web connection roller 20 and guided out of the device 10 in the machine direction 36, symbolized by the arrow, the finished surface product 80, which is designed in two layers.

FIG. 2 shows a section of FIG. 1 relating to the first embossing roller 12 and the second embossing roller 16 with an exemplary arrangement of the first to fourth shown

Embossing survey 40, 42, 44 and 46. It is symbolically marked by the Versehung of top surfaces of the first embossment elevation 40 and the third embossment elevation 44 with first glue 23 and second glue 27, wherein the first and the second glue 23 and 27

preferably colored differently. However, the first size 23 and the second size 27 may also be uncoloured, or only one of the two sizes may be colored.

Fig. 3 shows schematically the situation in the gap 38 formed between the first

Embossing roller 12 and the second embossing roller 16, wherein for better illustration

Rounding the embossing rollers 12 and 16 is not taken into account. Fig. 3 shows the state without introduced in the gap 38 material webs. On the first embossing roller 12, first embossing projections 40 can be seen with a height h which is greater than a height h _{2 of} second embossing projections 42. The heights h and h ₂ are calculated from a base 48 of the first embossing roller 1 2 to a top surface 52 the first embossing survey 40 and a top surface 54 of the second embossing survey 42 determined. The first embossment elevation 40 and the second embossment elevation 42 are formed in this example in a truncated pyramid, the first embossment elevation 40 having first and second side surfaces 60 and 61 and the second embossment elevation 42 having first and second side surfaces 62 and 63. The side surfaces 60 and 61 or 62 and 63 are formed symmetrically to each other and have an opening angle of about 60 degrees in the first embossment elevation 40 and about 65 degrees in the second embossment elevation 42. The third embossing elevations 44 of the second embossing roller 16 have a height h ₃ which is greater than a height h _{4 of} fourth embossing elevations 46. In this case, the heights h ₃ and h _{4 are} measured starting from a bottom 50 of the second embossing roller 16 up to one Top surface 56 of the third embossing survey 44 and a top surface 58 of the fourth embossment elevation 46. The third and the fourth

Prägeerhebung 44, 46 are also formed like a truncated pyramid, wherein the third embossment elevation 44 has side surfaces 64 and 65 and the fourth embossment elevation 46 side surfaces 66 and 67. The side surfaces 64 and 65 and 66 and 67 are symmetrical to each other in particular with equal opening angles, said the angle determined between the base 50 and the side surfaces 64 and 65 of the third

Prägeerhebung 44, about 80 degrees and the angle of the fourth embossment 46, determined from the base 50 and the side surfaces 66 and 67, is about 74 degrees.

For illustrative clarity, in Fig. 3, the first size 23 is on the first one

Embossing survey 40 and the second glue 27 shown on the third embossment elevation 44, wherein the first glue 23 and the second glue 27 on the first and second glue unit 22, 26 can be applied. In addition, reference numeral 70 designates a normal line which is defined by the top surfaces 56 of the third embossment elevation and top surfaces 52 of the first embossment elevation 40. The gap distance between the top surfaces 52 of the first embossment elevation 40 and top surfaces 58 of the fourth embossment elevation 46 and the top surfaces 54 of the second embossment elevation 42 and the top surfaces 56 of the third embossment elevation 44 is approximately 3/100 mm.

FIG. 4 shows the situation in the gap 38 between the first embossing roll 12 and the second embossing roll 16 when material webs 30 and 32 are fed, each being single-layered, using a device 10 according to FIG. 1. Clearly, the connection via the first glue 23 or the second glue 27 in the region of the embossing-roller pairs is the first embossment elevation 40 / second embossment elevation 46 or second embossment elevation 42 / third emboss elevation 44.

Fig. 5 shows a schematic representation of a second embodiment of the

Device 10 according to the invention, wherein only deviations from the first embodiment according to FIG. 1 are explained below. Incidentally, in Fig. 5 are the same Reference numeral for the same parts used as in Fig. 1st In the second embodiment of the device 10 according to the invention as shown in FIG. 5, a material web 30 is formed by a first layer 29 and a second layer 31 and a material web 32 formed by a third layer 33 and a fourth layer 35. This ultimately leads to a total of four-layer surface product 80 formed. Otherwise, the feeding of the two-ply web 30 and 32 and the gluing takes place in the same way as described in the first embodiment according to FIG.

Fig. 6 shows the situation in the gap 38 between the first embossing roller 1 2 and the second embossing roller 16 when supplying the webs 30 and 32 with the device 10, as shown in Fig. 5. Here, too, the connection of the individual layers 29, 31, 33 and 35 of the two-ply web 30 and 32 in the region of the embossing survey pairs 40/46 and 42/44 can be recognized well using a first glue 23 and a second glue 27. 7 shows a third embodiment of the device 10 according to the invention in a schematic representation, wherein only deviations from the first embodiment according to FIG. 1 are explained below. In contrast to the first and second embodiments, a pre-embossing unit 90 is additionally provided, via which a two-ply third material web 34 is guided between a single-ply material web 30 and a single-ply material web 32 into the gap 38 between the first embossing roll 12 and the second embossing roll 16 , The pre-embossing unit 90 comprises a first pair of rollers with a smooth roller or Gummigegenwalze 94 and one of these associated first embossing roller 92 and a second pair of rollers with a second smooth or

Gummigegenwalze 98 and a second associated therewith the second embossing roller 96. A

Glueing unit 100 is associated with the first embossing roller 92, being provided via a glue application roller 102 embossing surveys on the embossing roller 92 in the region of the top surfaces with glue. As can be seen schematically in the embodiment of the two-ply web 34, embossing bumps with identical heights are provided on the embossing rolls 92 and 96, and the rolls are synchronized in such a way that a "TIP-to-TIP" connection takes place. Accordingly, each individual embossment elevation of the first embossing roll 92 is on its Head surface provided with glue and connects to a corresponding head surface of an embossment elevation of the second embossing roll 96. The third material web 34 is the gap 38 as described above. Otherwise, the feeding of the single-ply material web 30 and 32 as shown schematically in Fig. 1, so that ultimately the four-ply product 80 is formed and led out in the machine direction 36, indicated by the arrow, from the device 10.

8 shows a schematic representation of the conditions in the gap 38 between the first embossing roll and the second embossing roll 16 when using a device according to FIG. 7. The material web 30, 32 and the two-ply introduced centrally between them

Material web 34 with the layers 104 and 106 can be clearly seen. The resulting four-ply product has a larger volume at the same time

Provide adequate softness and providence

differently colored first and second size 23 and 27 a two-tone pattern.

Fig. 9 shows a fourth embodiment of the device 10 according to the invention in a schematic representation, wherein in the following now differences are explained with respect to the third embodiment of FIG. 7, wherein otherwise the same

Reference numerals for the same parts are used. The fourth embodiment of the device 10 according to FIG. 9 also has a pre-embossing unit 90 which is identical

Here, however, the material web produced by the "TIP-to-TIP" method from the individual layers 104 and 106 as the second web 32 around the Gummigegenwalze 1 8, which is turned off by the second embossing roll 1 6, the gap 38 between the first embossing roller 12 and second

Embossing roller 16 fed to the formation of ultimately a three-ply surface product 80, which is taken in the machine direction 36, indicated by the arrow, the device 10.

Fig. 10 shows the relationships in the gap 38 between the first embossing roller 1 2 and the second embossing roller 1 6 in a schematic representation, wherein the compound of first material web 30 with the second material web 32, the two-layer formed by "TIP-to-TIP" connected layers 104 and 106 is formed, is recognizable.

FIG. 11 shows a two-ply surface product 80, as can be produced, for example, with the device 10 shown schematically in FIG. The

Surface product 80 has microembossing points 82 on which form a micro embossing pattern, wherein further macroprints in the form of design embossing areas 84.1, 84.2 and 84.3 are present. The design embossing areas 84.1 form cloud-like

Macro embossing pattern, the design embossing areas 84.2 a sheepskin-like

Macro embossing patterns, and the design embossing areas 84.3 curved line-shaped elements as further macro embossing patterns. All design embossing areas 84.1, 84.2 and 84.3 have unembossed areas 86 around the macro embossing, which emboss the areas

Highlight design macro embossing pattern. FIG. 12 shows the situation along a section A-A through the two-layer surface product 80 according to FIG. 11. Clearly, the design macro embossing pattern 84.3 can be seen, which is generated by embossing surveys on embossing rollers with a broad, in particular 2.4 times as wide head surface compared to the embossing surveys 82, whereas micro-embossing dots 82 by embossing surveys on the embossing rollers with smaller, d. h less wide head surfaces are formed. The micro-embossing patterns 82 and

Macro embossing patterns 84.2 are produced by embossing elevations arranged correspondingly on the first and the second embossing rolls 12 and 16, for example of the device 10 according to FIG. 1, namely by the embossing embossing pairs 40/46 and 42/44. The top surfaces of the micro-embossing dots 82 and the line-shaped macro embossing pattern 84.3 are joined together by first colored glue 23 and second colored glue 27.

For example, the first colored glue 23 may be tinted in color and the second colored glue 27 may be green, so that a green dot microembossing pattern with microembossing dots 82 marks the face product 80 with a brown color highlight

Design macro embossing pattern 84.2 and then correspondingly colored macro embossing patterns 84.1 and 84.3, respectively. On both sides of the macro embossing pattern 84.3 of FIG. 12 are unembossed Areas 86, also called omission, can be recognized approximately in the width of an embossment elevation row. In these areas, however, for example, as indicated in Fig. 12 by dotted lines, embossing surveys 88.1 and 88.2 may be arranged, generated by corresponding embossing elevations on the first embossing roller 1 2 and the second embossing roller 16, for example, a device 10 according to FIG However, these, in particular due to the non-complementary formation of the same or lower heights compared to the micro-embossing projections 82 and the

Designmakroprägeerhebungen 84.1, 84.2 and 84.3, have no connection by means of glue, and therefore no pattern in the surface product 80 of FIG. 1 1 can be seen in these areas.

The present invention thus an apparatus, a method and a

Surface product provided, which meets high aesthetic requirements and at the same time has sufficient strength, also lofty and softness. The softness can be positively influenced in particular in a more than two-layered design of the surface product.

Claims

1

claims

1 . An apparatus (10) for producing sheet products (80) comprising a first embossing roller (12) comprising at least first and second embossment bumps (40, 42), wherein the first embossment bump (40) has a height h and the second

The embossment elevation (42) has a height h ₂ , wherein h and h _{2 are} different, further comprising a second embossing roller (16), comprising at least a third and a fourth embossment elevation (44, 46), wherein the third embossment elevation (44) has a height h ₃ and the fourth embossment elevation (46) has a height h ₄ , wherein h ₃ and h _{4 are} different, and wherein the first and second embossing rollers (1 2, 16) are associated with each other such that at least in partial areas thereof the first embossing elevation (40) of the fourth embossment elevation (46) and the second embossment elevation (42) of the third embossment elevation (44) are assigned. 2. Device according to claim 1, characterized in that top surfaces (42, 44), (56, 58) of the first and fourth embossment elevation (40, 46) and the second and third embossment elevation (42, 44) are arranged substantially opposite one another.

3. Device according to one of the preceding claims, characterized in that the first embossing roller (12) is associated with a first smooth roller (14).

4. Device according to one of the preceding claims, characterized in that the second embossing roller (1 6) is associated with a second smooth roller (1 8). 5. Device according to one of the preceding claims, characterized in that the first embossing roller (12) is associated with a first gluing unit (22).

6. Device according to one of the preceding claims, characterized in that the second embossing roller (1 6) is associated with a second gluing unit (26). 2

Device according to one of claims 5 or 6, characterized in that the first and second gluing units (22, 26) are loaded with glue (23, 27) of different color.

Device according to one of the preceding claims, characterized in that the first embossment elevation (40) and third embossment elevation (44) has a height h and h ₃ in a range from about 600 μm to about 2000 μm measured from a base (48). the first embossing roller (12) and a bottom (50) of the second embossing roller (16).

Device according to one of the preceding claims, characterized in that the second embossment elevation (42) and the fourth embossment elevation (16, 46) have a height h ₂ and h ₄ in a range from about 400 μm to about 1800 μm measured from the ground ( 48) of the first embossing roller (12) and a bottom (50) of the second embossing roller (16).

Device according to one of the preceding claims, characterized in that the first and / or second embossing roll (12, 1 6) include omissions without embossments (40, 42, 44, 46).

A method of producing sheet products using a device (10) having a first embossing roll (1 2), comprising at least first and second embossing bumps (40, 42), the first bumping bump (40) having a height h and the second embossing bump (12). 42) has a height h ₂ , wherein h and h _{2 are} different, and with a second embossing roller (16), comprising at least a third and a fourth embossment elevation (44, 46), wherein the third embossment elevation (44) has a height h ₃ and the fourth embossment bump (46) has a height h ₄ , wherein the first and the second embossing roll (1 2, 16) are associated with each other such that the first

Prägeerhebung (40) of the fourth embossment elevation (46) and the second embossment elevation (42) of the third embossment elevation (44) are assigned, so that when guided by 3 of at least one first web (30, 32, 34) by means of a gap (38) formed between the first and second embossing rollers (12, 16) at least partially the first web (30, 32, 34) in the region of top surfaces (52, 54 , 56, 58) of the first to fourth embossing elevations (40, 42, 44, 46).

5

1 2. A method according to claim 1 1, that a first glue (22), a first glue (23) on the first embossment elevation (40) with the height h is applied.

1 3. A method according to any one of claims 1 1 or 12, characterized in that 10 via a second glue unit (26), a second glue (27) on the third embossing elevation

(44) with the height h _{3 is} applied.

14. The method according to any one of claims 12 or 1 3, characterized in that the first and the second glue (23, 27) are used differently colored.

15

1 5. A method according to any one of claims 1 1 to 14, characterized in that the at least one first web (30) over the first embossing roll (12) and at least one second web (32) over the second embossing roll (16) are guided.

A method according to any one of claims 11 to 15, characterized in that between the first and second webs (30, 32) at least one third web (34) is introduced.

1 7. A method according to any one of claims 1 1 to 1 6, characterized in that the first, second or third web (30, 32, 34) are embossed or unembossed.

1 8. A method according to any one of claims 1 1 to 1 7, characterized in that the first or second embossing roller (12, 16) is associated with a connecting roller (20).

30 4

1 9. Surface product, prepared with a device according to any one of claims 1 to 10 or with a method according to any one of claims 1 1 to 1 8.

20. Surface product according to claim 19, characterized in that it is made of tissue and / or a tissue-like material.

21. Use of a surface product according to any one of claims 1 9 or 20 as toilet paper, kitchen paper, cleaning cloth, tissue, handkerchief, napkin or paper towel.