EP2642011B1 - Equipment method and equipment with defined liquor application - Google Patents

Description

The invention relates to a finishing method and a device with defined fleet order for the equipment of a web.

The invention relates in particular to chemical finishing processes. Chemical finishing processes include, for example: dyeing, printing, flame retardant, bleaching, machine-washable equipment, nano-equipment, stain-resistant equipment, UV blocking equipment, antistatic equipment, antibacterial equipment, ironless equipment, burnout equipment, repellent equipment, or insecticidal equipment.

The equipment of a web comprises in particular the order of the generally liquid chemical, the so-called fleet, on the web.

The functionality of the finished fabric is guaranteed by the amount of applied chemical (so-called oil pick-up, OPU). This is the amount of chemical that remains on the web after drying. It results from the applied fleet quantity (so-called wet pick-up, WPU) times the fleet concentration.

There are already known methods and devices for the equipment of webs. For example, the shows DE 10 2006 038 339 A1 Such a device and method. Known applicators or application methods have the disadvantage that for certain applications (for example, high web speeds, wet-on-wet processes, fleece equipment), they do not provide optimal results or are associated with great expense.

From the US 4,893,485 A an applicator device is known in which a web is guided past an applicator roll and then through a nip.

The DE 92 03 504 U1 shows a device in which a web is passed through a nip, is introduced into the treatment liquid and the web is then passed through a further nip.

The GB 2 114 471 A shows an apparatus in which the size of a liquid wedge is measured in front of a nip and influenced depending on this size of the nip.

The invention has set itself the task of providing a method and an apparatus for finishing a web, with improvements in at least one of the mentioned disadvantages.

This object is achieved by the reproduced in claim 1 method and reproduced in claim 7 device.

In the finishing process with defined liquor order for the equipment of a material web, a liquor is first applied to a material web by means of a coating unit which permits a defined liquor application. Subsequently, the web is passed through a nip. Different expressed the web is passed through a nip, which is arranged in the web transport direction behind the application unit. The nip is preferably arranged directly behind the applicator or only separated by deflection rollers of the applicator. The nip may be formed by a squeezing.

In the context of this document, a defined fleet order means, in particular, a selected, specific and constant fleet order (WPU).

The advantages of application methods that allow defined fleet orders and the advantages of a nip are thereby combined.

The application unit, which permits a defined liquor application, preferably comprises an application roller and particularly preferably a KissRoll applicator. A KissRoll applicator is in particular a coating unit, in which the web is rotated on a in a liquor bath in a scoop, with A fleet of wet application roll is transported past, in order to apply the fleet on the web. The fleet takeover is not as in a foulard the system left but specifically determined. In this case, the rotational speed of the applicator roll can be varied, for example, taking into account the liquor level in the scoop. The peripheral speed of the applicator roll must therefore not correspond to the web speed. The web preferably wraps around the applicator roll in a certain angular range.

Equipping by application roller or the KissRoll application is known per se from the prior art for the minimum order. Here, the smallest amounts of liquor are applied approximately to a nonwoven web, which can be up to 15% of the net weight of the web. This known from the prior art finishing process is used when a penetration into the material or the web is not absolutely necessary and also the absolute uniformity across the width is not absolutely necessary, which is not reached with these low order quantities. For many applications, however, the effects that can be achieved with this method are not sufficient. Often, at least a partial penetration and a closed, uniformly coated surface are required. This is usually achieved today in the foulard by "diving" and "squeezing". In a foulard, a nip is arranged downstream of a dipping trough.

When Foulardapplikation the web is passed through a plunge pool, where they entrained depending on the fleet, the goods, the web speed and the merchandise management in the basin a certain amount of liquor. This lies in the textile sector at about 350% to 400% of the dry weight of the web. This amount is not to be controlled. It can therefore be no influence on the entrained fleet amount. The excess is squeezed off in the subsequent nip and returned to the tank. The line load in the nip thus determines the residual moisture of the web and also guarantees a uniform, reproducible fleet order and best penetration. The residual moisture before entering the dryer thus depends solely on the squeezing effect in the nip. A disadvantage is the high residual moisture after the crimping, which requires long drying times with high energy input. In addition, only a two-sided fleet application is possible. The usual web speeds in the textile sector are at 100 m to 150 m per minute. For fleece equipment, they are much higher at 300 to 400 meters per minute. At web speeds of more than 150 m per minute occur in the padding application further disadvantages. The equipment, for example, impregnation or the uniform and closed coating of a flow sheet in Foulard therefore encounters limits. Because it comes to the following problems: The web tears when leaving the liquid bath with so much liquor that it splashes everywhere and barely controlled back into the tank can be returned. The falling back into the pool fleet and the extremely high excess amount, which is squeezed in the nip and then with great momentum also runs back into the trough, z. B. Netztrog, caused in many recipes foam. This foam can hardly be handled and it leads, if it is carried away by the web, to defects on the finished goods. The large amount of entrainment (up to 400%) of the fleet resulting from the high speed produces a great weight force and, as a result, a corresponding product tension. This can lead to width drops, in the worst case, qualities with low wet tensile strength, the web tear.

Even wet-on-wet equipment, such as wet-on-wet finishing, has disadvantages in the padding application. Wet-on-wet finishing is the application of finishing agents to an already wet web. This process is currently used primarily in textile finishing. The background is that in order to achieve certain effects on the web, it is often necessary to impregnate a textile web with two or more fleets. For procedural reasons, this sometimes has to be done in two consecutive application steps. Reasons for a two-step application may be that pre-crosslinking is required to improve the penetration of product 2. It is also possible that the chemicals used in the two approaches can not be prepared in a bath, without causing undesirable reactions, eg. As for flocculation, clumping or the like. One reason for a two-step application can also be that the baths have different temperatures for procedural reasons.

In one embodiment, a plurality of, for example two, a defined fleet order permitting application units are provided one behind the other, which particularly preferably apply different fleets.

The wet-in-wet application has a very special significance for the equipment of hydroentangled nonwovens (spunlace). Due to the web-forming process, the nonwoven web is wet anyway and would have to be dried in between for a classic dry-in-wet finish. Only then could she undergo the refining process and then be dried a second time. The wet-on-wet application allows in-line equipment without the energy-intensive step of this intermediate drying. However, the wet-on-wet application in the padder creates a problem that makes this process very complex. During the impregnation in the trough (net trough) there is a fleet exchange in the goods. In the particular case of a hydroentangled nonwoven web, water from the web forming process is at least partially replaced with the finishing agent (liquor). The displaced from the commodity water thus enters the submitted fleet, causing a dilution of the recipe. This is reinforced by the squeezed in the nip fleet surplus must be returned to the basin. This can also contain water in addition to liquor. To ensure consistent and reproducible equipment effects, it is therefore essential to "re-sharpen" the formulation (liquor) to generate a constant liquor concentration.

In the embodiment in which the application unit, which permits a defined liquor application, comprises an application roller or KissRoll applicator, the advantages of both application methods (application roller or KissRoll applicator and padder) can be combined while at the same time avoiding or reducing the respective disadvantages become.

Thus, while initially a hardly or barely controllable amount of liquor is taken along by the fabric web in the padding application, and the accuracy and reproducibility of the order is ensured by the nip (surplus order), the order by means of applicator roll or KissRoll applicator is a completely different idea based. In known application devices by means of request roller or KissRoll applicator is already applied from the beginning only as much liquor on the web, as desired.

The amount of the defined liquor application can preferably be influenced quickly and reliably in a large range by the speed of the application roller in the application unit, which comprises an application roller or KissRoll applicator.

Preferably, by the application unit, which allows a defined fleet order, also a defined fleet order. In one embodiment, this is 50% of the net weight of the web. In another embodiment, the WPU is 25%. Other values are conceivable.

Through the nip no fleet is squeezed. It thus takes place by the order aggregate, which allows a defined fleet order, preferably no surplus order. The entire fleet that has been applied preferably remains on the web. The liquid content in the web before the nip thus preferably corresponds to the liquid content in the web after the nip. The nip does not take over the task in this embodiment, which he takes over in a foulard, where he brings about by reducing the surplus order only the exact order quantity. Surprisingly, its use has also proved to be very advantageous in this embodiment.

More specifically, no liquor is squeezed by the nip after a start phase. In a starting phase, preferably so much liquor is squeezed through the nip until a liquid wedge forms in front of the nip.

Preferably, the introduced liquor is homogenized by the nip and further preferably distributed and particularly preferably improves the penetration. In other words, in the embodiments in which he squeezes no liquor apart from a starting phase at most, the nip only serves to even out the volume of liquor on the substrate across the width and to press it into the goods.

In the preferred embodiment, the web is inserted horizontally or from above into the nip. The web thus runs in the nip in particular horizontally or obliquely downward or vertically downward. As a result, the conditions for a particularly suitable scheme are improved.

In one embodiment, the process is a wet-on-wet finishing process. The advantages of the invention are particularly effective in such a method. However, the method is not limited to a wet-on-wet finishing method, it is generally suitable for the equipment. In a further embodiment, the method is or includes, for example, a dry-in-wet application.

Preferably, the process comprises a nonwoven finishing process, in one embodiment for hydroentangled nonwoven web. The advantages of the invention are particularly well in such a process to advantage. However, the method is not limited to a specific web material or a specific web composition. In a further embodiment, the process comprises, for example, a finishing process for thermobonded nonwovens. The method can also be, for example, a finishing method for needled nonwovens, etc.

The web speed is preferably more than 300 m per minute, more preferably between 300 m per minute and 400 m per minute.

In particular, in the embodiment in which the web is introduced horizontally or from above into the nip and more particularly in the embodiment in which the web is introduced from above into the nip results a nip with a certain storage volume. By this it is meant that accumulating liquid in front of the nip and not immediately flushed down.

The line load in the nip and the defined liquor application amount are coordinated so that forms a liquid wedge before the nip. This is done in such a way that in a starting phase more liquid is squeezed off than is applied and then just as much liquid is squeezed off as is applied. The size of this liquid wedge, that is, the amount of liquid jamming in front of the nip, is largely constant after a start-up phase. The liquid wedge may also be referred to as liquid bead or liquor bead. In a preferred embodiment, apart from a starting phase, no liquor is squeezed off and yet a liquid wedge is formed or maintained. The liquid wedge may be advantageous for the homogenization of the liquor in the web. He also creates a condition for a very advantageous regulation.

Preferably, the actual value of the size of the liquid wedge is determined and compared with a desired value and depending on the deviation of the actual value of the desired value, the amount of the defined fleet order is changed. In this way, the size of the liquid wedge is preferably kept substantially constant. The liquid wedge, in particular the height or the size of this liquid wedge is therefore preferably used as a controlled variable. The determination of the actual value is preferably done by a measuring device. In the preferred embodiment, in which the application unit which permits a defined fleet order comprises a request roll or KissRoll applicator, the amount of the defined fleet order is preferably changed by changing the rotational speed of the request roll.

Alternatively or additionally, the actual value of the size of the liquid wedge is preferably determined and compared with a desired value, and the line load in the nip is changed as a function of the deviation of the actual value from the desired value. Also in this embodiment, the liquid wedge, in particular the height or size of this liquid wedge is used as a controlled variable.

In its device-side aspect, the object is achieved in that the equipment device according to the invention with defined liquor application for equipping a material web comprises an application unit which permits a defined liquor application onto a material web and a nip is arranged in the web transport direction behind this application aggregate. In Bahntransportrichtung behind this application unit so a nip forming rollers are arranged. The nip is preferably arranged directly behind the applicator or only separated by deflection rollers of the applicator. The nip may be formed by a squeezing.

The application unit, which permits a defined fleet order, comprises a request roller. It particularly preferably comprises a KissRoll applicator.

The nip does not squeeze any fleets off. The entire fleet that has been applied, therefore, preferably remains on the web. In other words, the line load in the nip is preferably adjustable or controllable so that the entire liquor that has been applied remains on the material web. More precisely, the nip does not squeeze any liquor at the end of a launch phase. In a starting phase, the nip preferably squeezes out so much liquor until a liquid wedge forms in front of the nip.

The nip preferably uniformizes the applied liquor. More preferably, the nip distributes the applied liquor and particularly preferably improves the penetration.

Preferably, the web runs horizontally or from above into the nip. The web thus runs in the nip in particular horizontally or obliquely or vertically downwards.

The device equips the web in one wet-on-wet embodiment. However, the device is not limited to wet-on-wet equipment. In another embodiment, the device equips the web, for example, dry-in-wet.

The device preferably equips fleece, in one embodiment spunlace reinforced with water jet. However, the device is not limited to a specific web material or web condition. In a further embodiment, the device equips, for example, thermobonded nonwovens. The device can also equip, for example, needled nonwovens.

The device preferably transports the web at more than 300 m per minute, more preferably at a speed between 300 m and 400 m per minute.

Preferably, the line load in the nip and the order amount are coordinated so that forms a liquid wedge before the nip.

In other words, the line load in the nip and the application amount are coordinated so that forms a liquid wedge before the nip.

The line load in the nip and the order quantity are coordinated or regulated so that in a star phase more liquid is squeezed off than is applied and then just as much liquid is squeezed off, as is applied.

Preferably, a measuring device is provided which determines the size of the liquid wedge, ie the actual value, and there is provided a control and evaluation unit which compares this actual value with a desired value and changes the amount of the defined fleet order depending on the deviation from actual value to desired value. In particular, the size of the liquid wedge is thus used as a controlled variable. In the preferred embodiment with applicator roll is preferred Amount of the defined fleet order changed by changing the speed of the application roller.

In other words, a measuring device is preferably provided, by means of which the size of the liquid wedge, ie the actual value, can be determined, and it is further preferred to provide a control and evaluation unit, by means of which this actual value is comparable to a desired value and depending on the deviation from the actual value to setpoint, the quantity of the defined fleet order can be changed.

Alternatively or additionally, the control and evaluation unit preferably changes the line load in the squeezing unit as a function of the deviation of the actual value of the size of the liquid wedge from the desired value.

In other words, as an alternative or in addition to this, the line load in the squeezing unit can be changed, preferably as a function of deviation of the actual value of the size of the liquid wedge from the desired value, by means of the control and evaluation unit.

Also in this embodiment, therefore, the size of the liquid wedge is used as a controlled variable.

In the preferred embodiment with application roller, the amount of the defined fleet order is preferably changed by changing the speed of the application roller.

Fig. 1

eine Seitenansicht eines aus dem Stand der Technik bekannten Foulards;

Fig. 2

eine Seitenansicht eines aus dem Stand der Technik bekannten Foulards bei hoher Warenbahntransportgeschwindigkeit;

Fig. 3

die Gegenüberstellung von aus dem Stand der Technik bekannten Ausrüstungsprozessen Trocken-in-Nass und Nass-in-Nass;

Fig. 4

eine schematische Seitendarstellung eines erfindungsgemäßen Verfahrens bzw. einer erfindungsgemäßen Vorrichtung;

Fig. 5

eine perspektivische Darstellung eines erfindungsgemäßen Walzenspaltes;

Fig. 6

die schematische Darstellung eines erfindungsgemäßen Ausrüstungsverfahrens einer wasserstrahlverfestigten Warenbahn;

Fig. 7

eine Seitendarstellung einer erfindungsgemäßen Vorrichtung, bei der die Warenbahn senkrecht von oben in den Walzenspalt eingeführt wird und sich ein Flüssigkeitskeil bildet;

Fig. 8

eine Darstellung wie in Fig. 7, wobei nicht die Drehzahl der Antragswalze verändert wird, um die Größe des Flüssigkeitskeils konstant zu halten, sondern die Linienlast im Walzenspalt.

The invention will now be explained in more detail with reference to embodiments shown in the drawings. Show it:

Fig. 1

a side view of a known from the prior art foulard;

Fig. 2

a side view of a known from the prior art foulard at high web transport speed;

Fig. 3

the juxtaposition of dry-in-wet and wet-on-wet finishing processes known in the art;

Fig. 4

a schematic side view of a method according to the invention or a device according to the invention;

Fig. 5

a perspective view of a nip of the invention;

Fig. 6

the schematic representation of a finishing process according to the invention a water-jet-strengthened web;

Fig. 7

a side view of a device according to the invention, in which the web is introduced vertically from above into the nip and forms a liquid wedge;

Fig. 8

a representation like in Fig. 7 in which the rotational speed of the applicator roll is not changed in order to keep the size of the liquid wedge constant, but the line load in the nip.

In Fig. 1 is shown a known from the prior art padder. Fig. 2 shows what happens when the web transport speed is increased in such a or similar pad about a certain value, in particular 150 m per minute. Fleet 2 sprays out of the net trough 14 and it forms foam 11, which is difficult to control.

Fig. 3 illustrates the benefits of a wet-on-wet process in equipping a hydroentangled web 3. Because it is recognizable (lower half of Fig. 3 ), that in this case eliminates the drying of the web 3 before Fleet application.

Fig. 4 shows an embodiment of a device according to the invention. The web 3 may be hydroentangled web. The application unit 1, which allows a defined fleet order includes in this Embodiment, an application roller 6 and is more specifically a KissRoll applicator 5. This includes an application roller 6, which rotates in a bath in a baster 12 and two guide rollers 16, 16 '. The application roller 6 is partially immersed in the fleet 2 and is wetted by the fleet 2. Outside the scoop 12, the web 3 is guided over a certain angular range of the applicator roll 6 along. The fleet 2 passes from the application roller on the web 3. The amount of this applied liquor can be easily and reliably controlled or regulated in a wide range, in particular via the rotational speed of the applicator roll 6. The peripheral speed of the application roller 6 need not correspond to the web transport speed, but it is a relative speed between the applicator roll 6 and the web 3 permissible. Immediately after the KissRoll applicator 5, the web 3 at the in Fig. 4 shown embodiment inserted horizontally into a nip 4. This uniforms the fleet 2 in the web 3 and improves the penetration. First, a defined amount of liquor is applied to the web 3 and distributed in the subsequent nip 4 evenly, in particular across the width. The order quantity is determined via the peripheral speed of the application roller 6. The line load pL in the nip 4 is then adjusted so that, although a liquid wedge 10 forms before the nip 4, but no liquor 2 is squeezed. (The liquid wedge 10 is in Fig. 4 shown very small.) So there is no surplus order. The entire amount of liquor that has been applied remains on the material web 3. The nip 4 behind the liquor application now only serves to even out and distribute the offered liquor 2 in the web and to improve the penetration. In this way, for example, a closed and homogeneous surface coating can be achieved with the lowest possible application quantity. The position of the nip 4 forming rollers is basically arbitrary. The axes of rotation of the two rollers can lie in a horizontal or vertical plane, as well as in all intermediate positions. The nip 4 is formed by a squeezing 7.

1. 1. Zunächst kann eine Vorwahl der Antragsdrehzahl am KissRoll erfolgen, aufgrund von Erfahrungswerten.
2. 2. Danach kann die Linienlast so eingestellt werden, dass sich vor dem Nip ein Wulst bildet, aber keine Flotte abgequetscht wird. Beziehungsweise kann danach die Linienlast so eingestellt werden, dass sich vor dem Nip ein Wulst bildet, aber keine Flotte aus dem Walzenspalt herausläuft.
3. 3. Wenn bei maximal zulässiger Linienlast die aufgetragene Flottenmenge zur "Wulstbildung" nicht ausreicht, kann die Drehzahl der Antragswalze und damit die Auftragsmenge so weit erhöht werden, bis sich vor dem Walzenspalt der Wulst bildet.

When setting the in Fig. 4 The equipment shown can be proceeded as follows:

1. 1. First, a preselection of the application speed on KissRoll can be made, based on experience.
2. 2. Thereafter, the line load can be adjusted so that forms a bead before the nip, but no fleet is squeezed. Respectively, then the line load can be adjusted so that forms a bead before the nip, but no fleet runs out of the nip.
3. 3. If, at the maximum permissible line load, the applied quantity of liquor is not sufficient for "beading", the speed of the application roller and thus the quantity applied can be increased until the bead forms before the nip.

The optimum setting thus requires individual coordination between the application quantity (speed of the application roller) and the line load in the nip, depending on the substrate to be equipped and the liquor to be applied.

Fig. 5 shows in a perspective view of such a nip 4. It can be seen that in any case no significant amount of liquor 2 flows from the nip 4. The liquid wedge 10 is thus smaller than the storage volume of the nip. 4

Fig. 6 schematically shows a finishing process according to the invention with defined product order.

Fig. 7 shows a specific embodiment, namely a gusset mode. The axes of rotation of the rollers forming the nip 4 lie in a horizontal plane. The web 3 is guided vertically from above into the nip 4, the web runs in the nip 4 so vertically downwards. The line load in the nip 4 and the application amount over the application roller 6 are coordinated so that forms a liquid wedge 10 before the nip 4 and on the upper side of the nip 4. For this purpose, a measuring device 9 is provided in this embodiment, which measures the height of this liquid wedge 10. This actual value 15 of the liquid wedge 10 is forwarded to a control and evaluation unit 8 and compared there with a desired value 13. Depending on the difference between the actual value 15 and the setpoint 13, the rotational speed of the application roller 6 is changed. In this way, the size of the liquid wedge 10 is kept constant. In other words, the level height in the "gusset" (ie liquid wedge) is regulated by the amount of application in the KissRoll and kept constant. The line load pL preferably remains constant in this embodiment. The residual moisture after the nip remains at least largely unchanged.

Fig. 7 shows that the residual moisture content of the web 3 before the finishing process, for example, 55%, after the liquor order on the application roller can be 80% and this moisture content of 80% is not changed by the nip 4. The liquor order in this example is therefore 25%, since there is a 100% addition of the liquor order to the residual moisture present in the web before liquor application. A liquor dilution or a replacement of water contained in the web 3 by fleet 2 does not take place.

at Fig. 7 Thus, a liquid bead control preferably takes place via the application quantity. Preferably, the WPU is determined in this embodiment - largely or at least almost exclusively - on the line load pL in the nip.

One possible way to adjust the equipment after Fig. 7 is reproduced below: First, the line load pL is set in the nip, for example, to an empirical value. As long as it is ensured that a liquid bead forms in front of the nip, the residual moisture after the nip (ie the WPU) is, at least in many finishing processes, a function of this line load pL. From the order system is "only" the tailor-made provision of this liquid supply causes. If necessary, the line load pL can be changed to change the WPU. In this case, a change of the order quantity by the order system takes place via the regulation immediately.

According to the embodiment Fig. 7 However, it is also conceivable that when setting the equipment device, the control shown in the figure first is disabled. The desired order quantity can then be set via the application roller. Thereafter, the line load pL in the nip can be adjusted appropriately, so that forms a uniform liquid bead. Last, the in Fig. 7 in order to maintain the state thus set in operation.

This in Fig. 7 embodiment shown is particularly suitable for finishing processes in which it can be assumed that remains largely exactly the same due to the constant line load pL in the nip of the WPU, if enough liquid is provided by the application system. By the control in this embodiment is preferably ensured that on the one hand enough liquid is provided by the application system, on the other hand, not more liquid than required reaches the nip, so is provided exactly the right amount.

Fig. 8 shows another embodiment. In the embodiment in Fig. 8 Although, as in the embodiment in Fig. 7 , the height of the liquid wedge 10 measured and this actual value 15 compared with a target value 13 in a control and evaluation unit 8. This changed at the in Fig. 8 shown embodiment, not the speed of the application roller 6, but the line load pL of the nip 4. In the embodiment according to Fig. 7 the size of the liquid wedge 10 is used as a control variable for the application amount and in the embodiment of Fig. 8 the size of the liquid wedge 10 is used as a controlled variable for the line load pL.

At the in Fig. 8 embodiment shown is preferably a further, not shown in the figure control provided: Preferably, the amount of application on the application roller 6 is controlled via the speed of the application roller 6 and kept constant. This can be done for example by continuously a defined amount of liquor is supplied to the scoop tank 12 and the fleet level is used in the scoop 12 as a control variable for the speed of the applicator roll.

The level height in the liquid wedge 10 is how Fig. 8 shows, regulated by the line load pL and kept constant. Nevertheless, the residual moisture at constant fleet level, after squeezing - at least largely, so within narrow limits - remains unchanged. Also at the in Fig. 8 Fleet order is 25% with an increase in humidity from 55% to 80%. As with the in Fig. 7 shown embodiment, a 100% addition of Fleet order and a liquor dilution does not take place.

At the in Fig. 8 As shown embodiment is thus preferably a liquid bead control over the line load. Preferably, the WPU is largely or at least almost exclusively determined by the application system in front of the nip. The line load is preferably adjusted automatically only so that a liquid bead forms in front of the nip. If, at the maximum permissible line load, the applied quantity of liquor is not sufficient for "beading", the speed of the application roller and thus the application quantity can be increased until the bead forms before the nip.

The embodiment according to Fig. 8 is particularly suitable for finishing processes where it can be assumed that the application system will achieve a largely exactly consistent order. By the control shown in the figure in this embodiment is preferably ensured that exactly this amount also passes through the nip.

In all the embodiments shown, the nip 4 may be followed by a dryer (not shown).

Thus, there is provided an application method and an application device which is capable of transferring defined amounts of liquor to a substrate, e.g. B. by means of KissRoll and often required for the effect uniformity and penetration in the subsequent nip 4. For this purpose, compared to a Foulardapplikation, in one embodiment, the foulard basin replaced by the KissRoll application.

All embodiments of the invention shown have several advantages over a Foulardauftrag: Fleet application by application roller 6 allows the smallest possible fleet application. This guarantees lowest energy consumption in the dryer. Due to the one-sided fleet order, it is possible to achieve different effects on the front and back of the web 3. For this purpose, the order quantity is specifically adjusted so that there is no complete penetration in the nip 4. The low on the web 3, in particular on the nonwoven web fleet remains even at high web speeds on the web 3, without wegzuspritzen. Since no surplus is applied, no fleet 2 runs back into the pool. Therefore, no foam is produced and there is no fleet dilution in the wet-on-wet application.

LIST OF REFERENCE NUMBERS

100

Equipment device with defined fleet order

1

Order aggregate, which allows a defined fleet order

2

fleet

3

web

4

nip

5

Kiss roll applicator

6

applicator roll

7

squeezer

8th

Control and evaluation unit

9

measuring device

10

wedge of liquid

11

foam

12

scoop pool

13

setpoint

14

power trough

15

actual value

16, 16 '

deflection rollers

pL

line load

Claims (7)

1. A finishing method having defined liquor application for finishing a material web (3), in which initially liquor (2) is applied to a material web (3) by means of an application unit (1) which allows the application of a defined quantity of liquor to a material web (3), wherein the material web (3) is led through a roller gap (4) situated downstream from the application unit (1) in the web transport direction, wherein the application unit (1), which allows the application of a defined quantity of liquor, includes an application roller (6), wherein no liquor (2) is squeezed out through the roller gap (4) after the starting phase elapses, characterized in that the line load in the roller gap (4) and the defined quantity of applied liquor are coordinated with one another in such a way that a liquid wedge (10) forms in front of the roller gap (4) in such a way that in a starting phase, more liquid is squeezed out than is applied, and subsequently, the quantity of liquid that is squeezed out is exactly the same as that applied, and the size of this liquid wedge (10), thus, the quantity of liquid accumulating in front of the roller gap (4), is essentially constant after a starting phase.
2. The method according to Claim 1, characterized in that the material web (3) is introduced horizontally or from above into the roller gap (4).
3. The method according to Claim 1 or 2, characterized in that the method is a wet-on-wet-finishing method.
4. The method according to any one of Claims 1 through 3, characterized in that the method is a finishing method for thermobonded nonwovens, having a material web speed between 300 m per minute and 400 m per minute.
5. The method according to any one of Claims 1 through 4, characterized in that the actual value of the size of the liquid wedge (10) is determined and compared to a setpoint value, and the quantity of the defined liquor application is changed as a function of the deviation of the actual value from the setpoint value.
6. The method according to any one of Claims 1 through 5, characterized in that the actual value of the size of the liquid wedge (10) is determined and compared to a setpoint value, and the line load (pL) in the roller gap (4) is changed as a function of the deviation of the actual value from the setpoint value.
7. A finishing device having defined liquor application (100) for finishing a material web (3), having an application unit (1) which allows the application of a defined quantity of liquor to a material web (3), wherein a roller gap (4) is situated downstream from the application unit (1) in the web transport direction, wherein the application unit (1), which allows the application of a defined quantity of liquor, includes an application roller (6),
   wherein the roller gap (4) squeezes out no liquor (2) after the starting phase elapses, characterized in that means are provided which are designed in such a way that the line load (pL) in the roller gap (4) and the applied quantity are coordinatable with one another in such a way that a liquid wedge (10) forms in front of the roller gap (4), wherein the line load (pL) in the roller gap (4) and the applied quantity are coordinatable with one another in such a way that in a starting phase, more liquid is squeezed out than is applied, and subsequently, the quantity of liquid that is squeezed out is exactly the same as that applied, and the size of this liquid wedge (10), thus, the quantity of liquid accumulating in front of the roller gap (4), is essentially constant after a starting phase.

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