WO2019029863A1

WO2019029863A1 - Machine and method for producing a fibrous material web

Info

Publication number: WO2019029863A1
Application number: PCT/EP2018/065105
Authority: WO
Inventors: Peter Mirsberger; Peter Hermann; Andreas Ziegelwanger; Udo Gabbusch; Thomas RÜHL; Martin MAUTHNER
Original assignee: Voith Patent Gmbh
Priority date: 2017-08-10
Filing date: 2018-06-08
Publication date: 2019-02-14
Also published as: CN110998021A; DE102017118222A1; EP3665325A1; CN110998021B

Abstract

The invention relates to a machine for producing a fibrous material web, in particular paper or board web, comprising a headbox, a shaping unit, a press section, a pre-drying section, a smoothing MG and/or Yankee cylinder, a smoothing device, a coating device and a take-up winding. The machine also comprises a calender unit having a multi-roller soft nip calender with at least one elastic nip and/or a shoe calender with a smooth press casing.

Description

MACHINE AND METHOD FOR PRODUCING ONE

The invention relates to a machine for producing a fibrous web, in particular a paper or board web, with a headbox, a forming unit, a press section, a pre-dryer section, a MG smoothing and / or Yankee cylinder, a smoothing device, a coater and a reel. It also relates to a method for producing a fibrous web, in particular paper or board web, in particular using a machine of the type mentioned, in particular for the production of single-side coated special paper.

In the production of fibrous webs, for example smooth paper on one side, the paper web is guided after the press section over a large, steam-heated cylinder, a so-called MG-smoothing or Yankee cylinder. Such a cylinder serves on the one hand to dry the paper web. On the other hand, the paper web is smoothed on its side facing the MG smoothing or Yankee cylinder by the long contact with the smooth and hot surface of the MG smoothing or Yankee cylinder. This is the decisive production step in the production of one-sided smooth papers, so-called MG (machine glazed) papers. One-side coated special papers (C1 S) are currently produced on such machine tools. These machines have only a Glättzylinder (GZ) to dry the fibrous web. The production capacity or speed of these machines is limited by the size or dry capacity of the Yankee. The maximum raw paper capacity is about 35 t / m, d for a Yankee cylinder with a diameter of 6 m and a gas-heated hood and a raw paper weight of 30-60 g / m ² . For higher raw paper production capacities, for which a value of 70 - 80 t / m, d is aimed for a pre-drying section in front of the Yankee cylinder and a Yankee cylinder with the largest possible diameter needed. For reasons of runability, ie for reasons of running property, the Yankee cylinder is overhead, ie in contact with the lower side of the track. With a film press (SpeedSizer) is usually the precoat applied to the smooth bottom and strength on the back. The order of the

Top coat is done with a so-called BladeCoater, and the curl control with a so-called LAS (Liquid Application System), ie a special application unit with associated roller or a nozzle moistener for wetting the web. Calendering is also carried out online with two to four or more soft- ners with a line force of up to 350 N / mm using thermo rolls with a surface temperature in the range of 150 ° to 200 ° on the underside. A currently used high-performance machine is designed for raw paper with a basis weight of 28 - 40 g / m ² for a speed of 1200 m / min. Such a machine includes a hydraulic headbox with dilution water technology, a wire with a hybrid former and a shaker, one

DuoCentri NipcoFlex press with three press nips, at least one of which is intended as a shoe press nip, or a tandem NipcoFlex press with two web press nipples arranged one behind the other in the web running direction, a one and / or two row pre-dryer section, a smoothing cylinder with a diameter of 6.4 m, a post-dryer section with a variable number of double-row dryer cylinders, a film press, a BladeCoater and a soft calender with a five-roll stack and four nips.

A disadvantage of these hitherto conventional high-performance machine tools is the one-sided drying of the web in the pre-dryer section on the Yankee side, which results in a moisture gradient of the web with higher dry content on the side of the web which is pressed against the Yankee cylinder. For optimum gloss and smoothness results, however, the moisture on the Yankee side should be as high as possible. Another disadvantage of such a conventional MG machine is the application of the web to the Yankee cylinder with a conventional press roll. The MG cylinder is operated with different vapor pressure depending on basis weight and production. Also, the line force of the press nip against the MG cylinder can vary within a wide range depending on the quality requirements. The different deformation behavior of the smoothing cylinder jacket can not be adequately followed by a conventional pressure roller and even a steel jacket deflection roll, resulting in a different line force progression across the width and uneven quality properties, particularly thickness, smoothness and gloss over the web width.

Unsatisfactory in such a conventional machine MG is also the calendering. To achieve the surface finish required for gravure and metallization, such as vapor deposition of aluminum, calenders with multiple nips, high loads and high temperatures are used. The high compressive stresses of the roll nips lead to a massive densification of the web, to unwanted decrease in stiffness and to undesirable smoothing of the back.

The invention has for its object to provide a machine and a method of the type mentioned, in which the aforementioned disadvantages are eliminated and the most efficient production of high quality papers, especially one-side coated special papers allow.

According to the invention this object is achieved by a machine having the features of claim 1 and a method having the features of claim 29. Preferred embodiments of the machine according to the invention and preferred embodiments of the method according to the invention will become apparent from the dependent claims, the present description and the drawings. The inventive machine for producing the fibrous web, in particular paper or board web, comprises a headbox, a forming unit, a press section, a pre-drying section, a MG smoothing and / or Yankee cylinder, a coater, a smoothing device and a winding. The machine comprises a calender unit with a multi-roll softnip calender with at least one elastic nip and / or a shoe calender with a smooth press cover. Due to the design according to the invention, the machine is particularly suitable for the online production of single-side coated specialty papers (C1 S), while ensuring efficient production of high-quality papers.

The multi-roll soft-nip calender preferably comprises an elastic nip formed between a soft roll and a hard roll, the softwalt being preferably arranged on the side of the fibrous web facing away from the MG-smoothing and / or Yankee cylinder.

The shoe calender preferably comprises a shoe press roll having the smooth press cover and a heated counter roll, wherein the shoe press roll is preferably arranged on the side of the fibrous web facing away from the MG smoothing and / or Yankee cylinder.

In this case, the shoe length of such a shoe calender, in particular in a range of 60 mm to 160 mm and its line force in particular in one

Range from 400 N / mm to 1 .200 N / mm. The temperature of the surface of the heated mating roll can be in particular in a range of 160 ° C to 250 ° C. The moisture of the fibrous web at the inlet into the shoe calender can be in particular in a range between 5% and 7%. In certain cases, it may be sufficient if the calender unit comprises only one shoe calender.

The calender unit preferably comprises a multi-roll soft-nip calender with at least one and a maximum of four roll nips and / or a shoe calender. Thus, a smoothing and compression of the web is achieved by means of high compressive stresses in the roll nip, whereby the micro-roughness or Bekk smoothness is correspondingly improved. With the finishing of the paper surface due to the long residence time in the Schuhnip at high temperatures, the macro roughness or PPS roughness is improved. Attempts in the production of label paper have shown that a shoe calender following a multi-roll soft-nip calender can achieve a significantly improved, closed surface on the coated side of the fibrous web without significant volume losses. For example, a multi-roll softnip calender having only one roll nip may comprise, for example, a two-roll stack and a four-nip multi-roll softnip calender, for example, a five-roll stack or two three-roll stacks.

The shoe calender can be arranged in the web running direction before or after the roll nips.

For example, in accordance with an expedient practical embodiment, the multi-roll softnip calender comprises a soft-iron calender with a stack of three rolls and two nips.

In certain cases, it can also be advantageous if means are provided for varying the moisture content of the fibrous web entering the calender unit, which means may comprise in particular a steam blower box or the like. According to an expedient practical embodiment of the machine according to the invention, the pre-drying section comprises a drying group with vertically successive, in particular steam-heated drying cylinders for drying the web side of the fibrous web remote from the MG smoothing and / or Yankee cylinder.

With the drying group with successive, in particular steam-heated drying cylinders in the vertical direction, a change of the drying from the underside to the top and a displacement, that is a change in the drying direction, occur. Increasing the moisture gradient on the underside of the fibrous web. Optimum gloss and smoothness values thus result on this side of the web, while smoothing of the back of the web is at least substantially avoided. The drying group preferably comprises two to four drying cylinders with successive drying cylinders in the vertical direction.

It is also particularly advantageous if the pre-drying section additionally comprises at least one single-row drying group. In the pre-drying section thus a completely closed web guide is maintained.

The diameter of the MG smoothing and / or Yankee cylinder is advantageously greater than 6 m, in particular greater than 6.6 m and preferably greater than 7 m. The cylinder diameter can be 7.3 m, for example. In addition, the MG smoothing and / or Yankee cylinder can be assigned at least one, in particular gas, preferably steam-heated hood, in particular high-performance hood. Such a smoothing and / or Yankee cylinder ensures a high drying capacity and high production. Preferably, the fibrous web is guided, starting from the end of the press section to the MG smoothing and / or Yankee cylinder supported by the machine, resulting in a correspondingly reduced risk of tearing the fibrous web. The headbox expediently comprises a hydraulic headbox with dilution water technology, with which first-class basis weight profiles can be achieved. In this case, the headbox can be provided transversely to the web running direction, for example with a pitch <50 mm. The forming unit preferably comprises a wire with a hybrid former and preferably a screen shaker, whereby a good formation as well as a lower tenacity ratio l / q and thus a high dimensional stability or low wet transverse elongation are achieved. According to a preferred practical embodiment of the machine according to the invention, the press section comprises at least one shoe press, preferably a Single NipcoFlex press with only one Schuhpressnip, a DuoCentri NipcoFlex press with two roll nips and a shoe press nip or a Tandem NipcoFlex press with two in the web running direction successively arranged Schuhpressnips, with a high dry solids content and a high initial wet strength are achieved and it is ensured that there is no or at most a minimal open draw.

The transfer of the fibrous web to the MG smoothing and / or Yankee cylinder takes place, in particular, in the region of a pressure roller resting against the MG smoothing and / or Yankee cylinder, preferably a shoe press roll or a deflection compensating roll with an elast jacket which is, for example, a So-called NipcoFullFlex roller, ie a deflection roll can act with a FullFlex sheath, which represents a composite sheath that is much more flexible than a steel or cast iron jacket and the contour of the MG Smooth Yankee cylinder can follow better. At the same time the press cover is much more flexible than a steel or cast iron jacket and can follow the contour of the MG cylinder better. A NipcoFullFlex roll stands out from a shoe roll, among other things, in that no concave shoe is used as a support source, but several along the length of the roll (or width of the machine) closely spaced, adjacent convex support sources. The jacket is composed of a CFRP jacket with an outer coating of polyurethane. Such a jacket is more flexible than a steel or cast shell, so that it can better adapt to a changing contour of the mating element, such as, for example, the MG smoothing Yankee cylinder. With such a pressure roller arranged on the MG smoothing and / or Yankee cylinder, a good adaptation to a respective MG smoothing or Yankee cylinder deformation results, a uniform line of force progression in the transverse direction and uniform quality properties with respect to thickness, smoothness and gloss.

It is also particularly advantageous if the smoothing device comprises a pre-calender, in particular a soft-smoothing unit with a stack comprising two rollers, a hard nip or a belt calender. With a Softglättwerk especially a uniform compression and thickness calibration is achieved.

It is particularly advantageous if the machine comprises a film press for a surface treatment of the fibrous web. With such a film press, it is possible in particular to apply a precoat on the side of the fibrous web facing the MG smoothing and / or Yankee cylinder and starch on the back side of the fibrous web.

It is also advantageous if the machine includes a BladeCoater for non-contact application of a top coat to the fibrous web. In this case, in particular, a top coat with profiling is possible. With such a blade Coaters are guaranteed in particular a uniform order and a good smoothness.

Conveniently, the machine also includes one or more cooling cylinders with associated steam box for curl control. Thus, an effective one-sided moistening of the fibrous web is possibly possible without subsequent drying cylinders.

According to an advantageous practical embodiment of the machine according to the invention, the press section comprises a DuoCentri-NipcoFlex press with two roll nips and a shoe press nip against a central roll, a NipcoFlex press with only one shoe nip and especially upper felt and lower transfer belt or double weft or a tandem NipcoFlex press with two consecutive shoe pressings ..

According to a further advantageous embodiment of the machine according to the invention, the press section can also comprise a so-called NipcoFullFlex roller with a press roll having a composite jacket. The composite shell of such a NipcoFullFlex roller is significantly harder than conventional polyamide sheaths. The wear layer is wear-resistant and temperature-resistant.

The MG smoothing and / or Yankee cylinder is in contact with either the lower or the upper side of the fibrous web. In this case, the MG smoothing and / or Yankee cylinder is provided at the top or bottom. In the case of the smoothing and / or Yankee cylinders which are in contact with the underside of the fibrous web, the successively drying cylinders of the preceding preceding drying group preferably contact the upper side of the fibrous web, while MG smoothing and / or contacting the upper side of the fibrous web Yankee cylinder the vertically successive drying cylinder of the preceding preceding drying group prefers the bottom Contact fibrous web. In both cases, however, in particular at least one single-row dryer group may be provided in front of it.

The MG smoothing and / or Yankee cylinder is preferably associated with at least one, in particular gas, preferably steam-heated hood.

In the web running direction after the MG smoothing and / or Yankee cylinder, a after-dryer section with at least one single- and / or double-row drying group can advantageously be provided.

It is advantageous in particular for a curl correction if the machine comprises a water film application device and / or a nozzle moistener with a subsequent drying group. The inventive method for producing a fibrous web, in particular paper or board web, is provided in particular for the production of single-side coated special papers, wherein it can be carried out in particular using a machine according to the invention. In this case, a pulp suspension supplied by means of a headbox is dewatered in a forming unit to form a fibrous web, the fibrous web further dewatered in a press section, pre-dried in a pre-drying, smoothed in a MG smoothing and / or Yankee cylinder and a smoothing device, painted in a coater and wrapped in a reel. According to the invention, the fibrous web is calendered by means of a calender unit having a multi-roll soft-nip calender with at least one elastic nip and / or a shoe calender with a smooth press cover.

Preferably, the fibrous web is fed to the drying group with vertically successive drying cylinders having a solids content in the range of 45% to 55%. Of particular advantage is also when the fibrous web is led out with a dry content in the range of 50% to 60% from the dryer group with successive drying cylinders in the vertical direction.

The steam-heated drying cylinders of the drying group with the successive drying cylinders in the vertical direction are preferably each operated with a vapor pressure in the range from 2.0 bar to 6.0 bar. The fibrous web or paper or board web is preferably produced with a raw paper weight in the range from 20 g / m ² to 120 g / m ² .

Advantageously, a one-sided line in the range of 5 g / m ² to 30 g / m ^{2 is} applied to the MG-smoothing and / or Yankee cylinder side facing the fibrous web.

The fibrous web or paper or board web is advantageously produced with a finished paper weight in the range from 20 g / m ² to 150 g / m ² and in particular in the range from 30 g / m ² to 90 g / m ² .

It is particularly advantageous if the fibrous web or paper or board web is produced with a maximum paper machine speed in the range of 1500 m / min. According to a further advantageous embodiment of the method according to the invention, the fibrous web is produced with a breaking length ratio <2.0: 1, in particular <1, 6: 1 and preferably <1, 5: 1. It is also advantageous if the fibrous web to be produced is passed through the production machine at least to a dry content in the range of 60% in a closed train. Preferably, the fibrous web is generated with a roughness value <0.6 μιτι on the coated side.

The invention will be explained in more detail below with reference to exemplary embodiments with reference to the drawing; show in this

Fig. 1 a) and 1 b) is a schematic representation of an exemplary embodiment of a machine according to the invention for producing a fibrous web. FIG. 2 shows a schematic partial representation of an exemplary embodiment of the machine according to the invention without a drying group with drying cylinders successive in the vertical direction compared with the machine according to FIGS. 1 a) and 1 b)

Fig. 3 is a partial schematic representation of a relative to the machine of FIG. 2 modified another exemplary embodiment of the machine according to the invention. 1 to 3 show different exemplary embodiments of a machine 10 according to the invention for producing a fibrous web 12, in particular paper or board web. In this case, the machine 10 can be provided in particular for producing single-side coated special papers (C1 S). The machine 10 comprises in each case a headbox 14, a forming unit 16, a press section 18, a pre-drying section 20, a MG smoothing and / or Yankee cylinder 22, a smoothing device 24, a coater 26 and a winding 28.

In the case of the machine 10 shown in FIGS. 1 a) and 1 b), the pre-drying section 20 comprises a drying group 30 with vertically successive, in particular steam-heated, drying cylinders 30 ', 30 "for drying the MG smoothing and / or Yankee cylinders 22 opposite web side of the fiber web 12th

The drying group 30 with successive drying cylinders in the vertical direction can in particular comprise two to four drying cylinders, wherein in the present case it has, for example, two such drying cylinders 30 ', 30 ".

In addition, the pre-drying section 20 can comprise at least one single-row drying group 32 arranged in the web running direction L in front of the drying group 30 with vertically successive drying cylinders 30 ', 30 " it is in particular greater than 6.6 m and preferably greater than 7 m.

The fibrous web 12 is guided from the end of the press section 18 to the MG smoothing and / or Yankee cylinder 22 supported by the machine 10. The headbox 14 may in particular comprise a hydraulic headbox with dilution water technology. It can be provided transversely to the web running direction L with a pitch of in particular <50 mm. The forming unit 16 can, as shown, a fourdrinier wire 34 with a hybrid former 36 and preferably a Siebschüttelung include, in the present case, a shaking of a breast roll 38 is provided.

The press section 18 can comprise at least one shoe press 40, preferably a single NipcoFlex press with only one shoe press nip, a DuoCentri NipcoFlex press with two roll nips and a shoe press nip or a tandem

NipcoFlex press with two in the web running direction L successively arranged shoe press nips. The transfer of the fibrous web 12 to the MG smoothing and / or Yankee cylinder 22 can take place in the region of a pressure roller 42 resting against the MG smoothing and / or Yankee cylinder 22, in particular a shoe press roll or a deflection compensating roll with an elast jacket. The smoothing device 24 may comprise a pre-calender, in particular a soft smoothing system with a stack comprising two rolls, a hard nip or a belt calender.

Subsequent to the smoothing device 24, a film press 44 may be provided for a surface treatment of the fibrous web 12.

For example, the coater 26 may include a BladeCoater for applying a topcoat to the fibrous web 12. In the web running direction L after the coating device 26, one or more cooling cylinders 46 may be provided with associated steam blower box 48.

In addition, the machine 10 has a calender unit 50, which may in particular comprise a multi-roll soft-nip calender 52 with at least one elastic nip and / or a shoe calender 45 with a smooth press jacket. there For example, the multi-roll soft-nip calender 52 may include a soft-ware with a three-roll, two-nip stack.

The press section 18 may, for example, a DuoCentri-NipcoFlex press with two roll nips and a shoe press nip against a central roll or a NipcoFlex press with only one Schuhpressnip and especially upper felt and lower transfer belt or double Befilzung or a tandem NipcoFlex press with two in the web running direction one behind the other arranged shoe press nips include.

For example, a press section 18 with a NipcoFullFlex roller with a press roll having a composite jacket is also conceivable.

In the present case, the MG smoothing and / or Yankee cylinder 22 is in contact, for example, with the lower side of the fibrous web 12, the MG smoothing and / or Yankee cylinder 22 being arranged on the upper side or the fibrous web 12 pointing upwards to the MG web. Smoothing and / or Yankee cylinder 22 is performed. In contrast, in the present case, the drying cylinders 30 ', 30 "of the drying group 30 following one another in the vertical direction contact the upper side of the fibrous web 12 in the present case.

The MG smoothing and / or Yankee cylinder 22 may be associated with at least one gas-heated, in particular steam-heated, hood 56. In the web running direction L after the MG smoothing and / or Yankee cylinder 22, a drying section 58 with at least one single- and / or double-row drying group can be provided.

For curl correction, a water film applicator and / or a nozzle moistener with a downstream drying group can be provided. The particular provided as a shoe press roll or deflection compensating roll with an elastomeric jacket pressure roller 42 is disposed within the loop of a transfer belt or press felt 60 through which the fibrous web in the machine 10 as shown in FIGS. 1 a) and 1 b) of the fibrous web over the vertical direction successive drying cylinder 30 ', 30 "of the drying group 30 leading fabric or dryer fabric 62 is adopted.

FIG. 2 shows a part of an exemplary embodiment of the inventive machine 10 without a drying group with successive drying cylinders in the vertical direction compared to the machine according to FIGS. 1 a) and 1 b), in which the fibrous web 12 is from a further transfer belt 64, which is the fibrous web 12 is supplied from the single-row dryer group 32, to which in its loop the pressure roller 42 containing transfer belt or press felt 60 is passed. Incidentally, the machine according to FIG. 2 can at least essentially be designed again like the machine illustrated in FIGS. 1 a) and 1 b).

The further exemplary embodiment of a machine 10 according to the invention which is only partly shown in FIG. 3 differs from that according to FIG. 2 at least substantially only in that the fibrous web 12 is transferred directly from the transfer belt 60 containing the pressure roller 42 in its loop Last drying cylinder 66 of the preceding single-tier dryer group 30 is removed. LIST OF REFERENCES

10 machine

12 fibrous web

14 headbox

16 forming unit

18 press section

20 pre-drying section

22 MG smoothing and / or Yankee cylinders

24 smoothing device, pre-calender

26 coating device

28 winding up

30 drying group

30 'drying cylinder

30 "drying cylinder

32 single row dryer group

34 fourdrinier

36 hybrid formers

38 breast roll

40 shoe press

42 pressure roller

44 film press

46 cooling cylinders

48 steam box

50 calender unit

52 multi-roll softnip calender

54 shoe calenders

56 hood

58 night drying section

60 transfer belt or press felt

62 covering, drying wire

64 transfer ribbon

66 drying cylinders

L web running direction

Claims

claims

Machine (10) for producing a fibrous web (12), in particular a paper or board web, with a headbox (14), a forming unit (16), a press section (18), a pre-drying section (20), a machine trowel and / or Yankee cylinder (22), a smoothing device (24), a coating device (26) and a winding (28),

Thereby, the machine (10) comprises a calender unit (50) having a multi-roll soft-nip calender (52) with at least one elastic nip and / or a shoe calender (54) with a smooth press cover.

Machine according to claim 1,

characterized in that the multi-roll soft-nip calender (52) comprises an elastic nip formed between a soft roll and a hard roll, wherein the soft roll preferably on the side facing away from the MG smoothing and / or Yankee cylinder (22) side of the fibrous web (12) is arranged, and / or that the shoe calender (54) comprises a smooth pressing shell having shoe press roll and a heated counter-roller, wherein the shoe press roll preferably on the side facing away from MG- smoothing and / or Yankee cylinder (22) side of the fibrous web (12) and / or that the calender unit (50) comprises only one shoe calender (54).

Machine according to at least one of the preceding claims, characterized in that the calendering unit (50) comprises a multi-roll soft-nip calender (52) having at least one and a maximum of four roll nips and a shoe calender (54), wherein the shoe calender (54) in the web running direction (L) is preferably arranged in front of the roll nips or that the shoe calender (54) in the web running direction (L) is preferably arranged after the roll nips.

Machine according to at least one of the preceding claims,

characterized in that the multi-roll soft-nip calender (52) comprises a soft-smoothing unit with a stack having three rollers and two nips, and / or means for varying the humidity of the fibrous web (12) entering the calender unit (50) are provided, wherein the means preferably comprise a steam blower box or the like, and / or that the pre-dryer section (20) comprises a drying group (30) with vertically successive, in particular steam-heated drying cylinders (30 ', 30 ") for drying the smoothing and / or Yankee cylinders (22) facing away from the web side of the fibrous web (12), wherein the drying group (30) with vertically successive drying cylinders (30 ', 30 ") preferably comprises two to four drying cylinders.

Machine according to at least one of the preceding claims,

characterized in that the pre-drying section (20) moreover comprises at least one single-row drying group (32), and / or that the diameter of the MG smoothing and / or Yankee cylinder (22) is greater than 6 m, in particular greater than 6.6 m and preferably greater than 7 m, and / or that the fibrous web (12) is guided by the machine (10), starting from the end of the press section (20) to the MG smoothing and / or Yankee cylinder (22). Machine according to at least one of the preceding claims,

characterized in that the headbox (14) comprises a hydraulic headbox with dilution water technology, and / or that the forming unit (16) comprises a wire (34) with a hybrid former (36) and preferably a sieve shaker, and / or that the press section (18 ) at least one shoe press (40), preferably a single NipcoFlex press with only one shoe press nip, a

DuoCentri NipcoFlex press with two roll nips and a shoe press nip or a tandem NipcoFlex press with two web press nips arranged one after the other in the web running direction (L).

Machine according to at least one of the preceding claims,

characterized in that the transfer of the fibrous web (12) to the MG-smoothing and / or Yankee cylinder (22) in the region of a MG-smoothing and / or Yankee cylinder (22) adjacent pressure roller (42), in particular a shoe press roll or deflection compensating roll with a Elastmantel, preferably a NipcoFullFlex roller with a composite jacket having shoe press roll, takes place, and / or that the smoothing device (24) a pre-calender, in particular a Softglättwerk with a two-roll stack, a hard nip, or a belt calender , and / or that it comprises a film press (40) for a surface treatment of the fibrous web.

Machine according to at least one of the preceding claims,

characterized in that it comprises a BladeCoater for applying a cover coat to the fibrous web (12), and / or that it comprises one or more cooling cylinders (46) with associated steam blower box (48), and / or that the press section (18) is a DuoCentri -NipcoFlex press with two roll nips and a shoe press nip against a central roll or a NipcoFlex press with only one shoe press nip and in particular upper felt and lower transfer belt or double Befilzung comprises.

9. Machine according to at least one of the preceding claims,

characterized in that the MG smoothing and / or Yankee cylinder (22) is in contact with the lower or the upper side of the fibrous web (12), and / or that the MG smoothing and / or Yankee cylinder (22) has at least one in particular gas, preferably steam-heated hood (56) is assigned.

10. Machine according to at least one of the preceding claims,

characterized in that in the web running direction (L) after the MG-smoothing and / or Yankee cylinder (22) is provided a after-dryer section (58) with at least one double-row dryer group, and / or that the machine has a water film applicator and / or a nozzle moistener downstream Drying group includes.

11. A method for producing a fibrous web (12), in particular paper or board web, in particular for producing one-side coated special papers, in particular using a machine (10) according to at least one of the preceding claims, wherein a by means of a headbox (14) supplied pulp suspension dewatered in a forming unit (16) to form a fibrous web (12), the fibrous web (12) further dewatered in a press section (18), predried in a pre-dryer section (20), in a MG smoothing and / or Yankee cylinder (22) and a smoothing device (24) is smoothed, painted in a coater (26) and wound up in a winding (28),

characterized in that the fibrous web (12) by means of a calender unit (50) with a multi-roll softnip calender (52) is calendered with at least one elastic nip and / or shoe calender (54) with a smooth press cover.

12. The method according to claim 11,

characterized in that the fibrous web (12) of the dryer group (30) is fed with vertically successive drying cylinders (30 ', 30 ") having a dry content in the range of 45% to 55%, and / or that the fibrous web (12) a dry content in the range of 50% to 60% is led out of the drying group (30) with vertically successive drying cylinders (30 ', 30 "), and / or that the steam-heated drying cylinders (30', 30") of the drying group (30) are operated with the successive drying cylinders in the vertical direction each with a vapor pressure in the range of 2.0 bar to 6.0 bar.

13. The method according to at least one of the preceding claims,

characterized in that the fibrous web (12) or paper or board web is produced with a raw paper weight in the range of 20 g / m ² to 120 g / m ² , and / or that on the MG smoothing and / or Yankee (22) facing side of the fibrous web (12) a one-sided line in the range of 5 g / m ² to 30 g / m ^{2 is} applied, and / or that the fibrous web (12) or paper or board web with a finished paper weight in the range from 20 g / m ² to 150 g / m ² and in particular in the range of 30 g / m ² to 90 g / m ^{2 is} produced.

14. The method according to at least one of the preceding claims,

characterized in that the fibrous web (12) or paper or board web is produced with a maximum paper machine speed in the range of 1500 m / min, and / or that the Fibrous web (12) having a tenacity ratio <2.0: 1, in particular <1.6: 1 and preferably <1.5: 1 is generated.

Method according to at least one of the preceding claims,

characterized in that the fibrous web (12) to be produced at least to a dry content in the range of 60% in a closed train through the manufacturing machine (10) is guided, and / or that the fibrous web (12) with a roughness value <0.6 μιτι on the painted page is generated.