EP4085169B1 - Verfahren und vorrichtung für die produktion von tissue-papier - Google Patents

Verfahren und vorrichtung für die produktion von tissue-papier Download PDF

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Publication number
EP4085169B1
EP4085169B1 EP20851298.8A EP20851298A EP4085169B1 EP 4085169 B1 EP4085169 B1 EP 4085169B1 EP 20851298 A EP20851298 A EP 20851298A EP 4085169 B1 EP4085169 B1 EP 4085169B1
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Prior art keywords
cylinder
product
chemical
paper
width
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English (en)
French (fr)
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EP4085169C0 (de
EP4085169A1 (de
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Gabriele NERI
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/181—Drying webs by hot air on Yankee cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/12—Crêping
    • B31F1/126—Crêping including making of the paper to be crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/36—Moistening and heating webs to facilitate mechanical deformation and drying deformed webs
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • D21G9/0009—Paper-making control systems
    • D21G9/0036—Paper-making control systems controlling the press or drying section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/146—Crêping adhesives
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • the present invention relates to a method and an apparatus for the production of tissue paper.
  • tissue paper indicates crepe paper of the type of toilet paper and similar products having a grammage of less than 100 g/m 2 , the production process of which has peculiar technical problems.
  • the conventional method of producing tissue paper is carried out using a single-cylinder machine that comprises a dryer cylinder (also known as a “Yankee cylinder” or “Yankee dryer”), and involves drying the paper in contact with the dryer cylinder, usually aided by a hot-air thermal hood with the interposition of a liquid product constituted by a liquid mixture of chemical products, also known as a "coater".
  • a dryer cylinder also known as a "Yankee cylinder” or "Yankee dryer”
  • a hot-air thermal hood with the interposition of a liquid product constituted by a liquid mixture of chemical products
  • the paper After drying, the paper is released from the surface of the dryer cylinder by way of a creping blade or rasp, also known as a "creping doctor", and then it is conveyed to an apparatus for winding to be wound into a spool.
  • a creping blade or rasp also known as a "creping doctor”
  • the liquid mixture is sprayed on the surface of the cylinder using hydraulic nozzles.
  • the liquid mixture that is distributed on the surface of the cylinder comprises the following products, mixed together before being dispensed:
  • the paper after drying, has a certain humidity (which generally needs to be comprised between 4% and 6%) and a grammage as uniform as possible along all the width.
  • the humidity and the grammage of the paper obtained depend partially on the composition and on the quantity of the liquid product dispensed on the cylinder; this product is in fact diluted in water, part of which is evaporated by the Yankee cylinder by contact, and a minimal part is absorbed by the paper.
  • the quality of the paper obtained also depends on the efficacy with which the creping blade removes the paper from the surface of the cylinder, and this efficacy depends in turn on the composition and on the quality of the liquid product dispensed on the cylinder.
  • the dosage of the chemical products for adhesion and release is entrusted to the experience of the operator, by manual actuation: the operator controlling the characteristics of the paper downstream of the cylinder decides, on the basis of their experience and training, whether and how to vary the quantity and composition of the mixture dispensed.
  • the operator is aided by detection devices that detect one or more process parameters (such as the vibration of the creping blade or the overall humidity of the paper downstream of the cylinder), but the choice of the dosage is still entrusted to the operator.
  • transverse dimension of the sheets of tissue paper usually varies from 3 to 6 meters and therefore such sheets have, downstream of the cylinder, a certain variability of grammage over the width, which entails a corresponding variability of humidity over the width: the thicker zones are more humid, while the thinner zones are less humid.
  • the patent document CN102978991 describes a solution that tries to overcome this latter problem by having, for dispensing the products on the cylinder, a series of hydraulic nozzles each of which dispenses all the products already mixed, and the flow of which can be varied individually for each nozzle. In this manner it is possible to vary the quantity of mixture dispensed in a non-uniform manner along the width of the cylinder.
  • this solution does not make it possible to vary the ratio between the chemical products in the mixture in the individual zones, and therefore the dosage ratio of the products will always be the same along all of the width.
  • the aim of the present invention is to provide a method for the production of tissue paper that solves the above technical problem, compensates for the drawbacks and overcomes the drawbacks of the prior art, by allowing a more effective adjustment of the dispensing of the chemical products on the surface of the cylinder.
  • an object of the present invention is to provide a method for the production of tissue paper that makes it possible to correct the variability of humidity of the paper produced across the width.
  • Another object of the invention is to provide a method for the production of tissue paper that makes it possible to minimize the technical problems deriving from the friction of the creping blade on the surface of the cylinder.
  • Another object of the invention is to provide a method for the production of tissue paper that decreases the impact of human error and of the abilities of the operator on the quality of the product obtained.
  • Another object of the invention is to provide a method for the production of tissue paper that is economically advantageous in terms of energy costs and chemical products and water used, and possibly also of reduction of production discards.
  • the method for the production of tissue paper 90 having a grammage of less than 100 g/m 2 using a single-cylinder machine 10 is provided preferably by the apparatus described below and generally designated by the reference numeral 1.
  • the apparatus 1 for the production of tissue paper comprises a single-cylinder machine 10 which comprises a dryer cylinder 2 (i.e. a dryer cylinder of the type also known as a "Yankee cylinder” or “Yankee dryer”) which has a work surface 21 that has a useful width L that is adapted to be covered by the paper 90.
  • a dryer cylinder 2 i.e. a dryer cylinder of the type also known as a "Yankee cylinder” or "Yankee dryer”
  • a work surface 21 that has a useful width L that is adapted to be covered by the paper 90.
  • the cylinder 2 is, in a known manner, surmounted by a hot-air hood 211 which is per se known in the technical sector (they are known as "Yankee hoods").
  • the apparatus 1 also comprises, in a known manner, a creping blade 3, or rasp or creping cutter, which is configured to release the paper 90 from the work surface 21 of the cylinder 2.
  • the creping blade 3 is positioned, in a known manner, tangentially to the surface of the cylinder 2, and thus is in contact with the entire surface of the cylinder including the edge zones 22a, 22b.
  • the apparatus can also comprise, upstream and downstream of the cylinder 2, any conventional apparatus necessary to the production of the paper, such as for example spooling devices for winding the paper in a spool 190 and devices to convey the paper, presses 300, etc.
  • the apparatus 1 comprises one or more vibration sensors 31, 32, 33 which are configured to detect the vibrations of the creping blade 3, i.e. at least one parameter representing the vibrations of the blade (preferably frequency and/or intensity of the vibrations).
  • the vibration sensors 31, 32, 33 comprise:
  • the presence of the second vibration sensors 32, 33 makes it possible to detect the vibrations of the creping blade 3 in the zones where this is in direct contact with the surface of the cylinder and not with the paper 90.
  • the vibration sensors 31, 32, 33 are operatively connected to an electronic control system 200 which will be better described hereinbelow.
  • the apparatus 1 also comprises a scanner 8 configured to detect a humidity profile and/or a grammage profile of the paper 90 along the width of the paper 90, downstream of the cylinder 2, i.e., to scan the humidity and/or of the grammage of the paper 90 transversely, detecting how the humidity and/or the grammage of the paper varies transversely.
  • a scanner 8 configured to detect a humidity profile and/or a grammage profile of the paper 90 along the width of the paper 90, downstream of the cylinder 2, i.e., to scan the humidity and/or of the grammage of the paper 90 transversely, detecting how the humidity and/or the grammage of the paper varies transversely.
  • the grammage and the humidity are correlated (they are directly proportional to each other) and therefore the scanner 8 can be configured to detect either the grammage or the humidity (preferably the humidity). However the possibility is not ruled out, for a more exact detection, of detecting both grammage and humidity.
  • the scanner 8 can, for example, be provided with a radioactive source inside a head that scans the paper 90 along its width, or with an infrared sensor, or in another known way.
  • the aforementioned scanner 8 when present, is also operatively connected to the electronic control system 200.
  • the apparatus 1 comprises, as an alternative or in addition to the scanner 8 (or integrated in it), a thermographic camera or thermoscanner 66 (for example infrared) configured to detect a thermal profile of the paper 90 along the width of the paper 90, downstream of the cylinder 2 (Yankee dryer) and preferably at the spool 190.
  • a thermographic camera or thermoscanner 66 for example infrared
  • the thermographic camera 66 is configured to execute a thermographic scan, transversely, of the paper 90, detecting the difference in temperature in the various zones.
  • the Applicant has in fact observed that the cooler zones correspond to more humid zones and the warmest zones to less humid zones.
  • thermographic camera 66 when present, is also operatively connected to the electronic control system 200.
  • the apparatus 1 comprises at least two separate series 5, 6, 7 of atomizer nozzles 5a-5o, 6a-6o, 7a, 7b for dispensing the chemical products on the surface of the cylinder 2, and more precisely at least one first series 5 of first atomizer nozzles 5a-5o and a second series 6 of second atomizer nozzles 6a-6o.
  • the first series 5 of first atomizer nozzles 5a-5o is configured to dispense a chemical release product a on the surface of the cylinder 2 along at least all the useful width L.
  • the atomizer nozzles 5a-5o of the first series 5 are aligned beside each other, preferably supported by a first bar 50 which optionally can move with respect to the cylinder 2, so that the jets Z of the first atomizer nozzles 5a-5o cover the entire useful width L of the cylinder 2 without overlapping.
  • the second series 6 of second atomizer nozzles 6a-6o is configured to dispense a chemical adhesion product b mixed with a chemical modifier product adapted to protect the surface of the cylinder and to modify the hardness of the chemical adhesion product b, on the surface of the cylinder 2 along at least all the useful width L (for convenience this mixture is generally indicated with the letter b).
  • the atomizer nozzles 6a-6o of the second series 6 are also aligned beside each other, preferably supported by a second bar 60 which optionally can move with respect to the cylinder 2, so that the jets of the second atomizer nozzles 5a-5o cover the entire useful width L of the cylinder 2 without overlapping.
  • the apparatus 1 also comprises a third series 7 of atomizer nozzles 7a, 7b which comprises at least one atomizer nozzle 7a, 7b for each one of the two edge zones 22a, 22b of the cylinder 2 which is configured to dispense on such edge region 21a, 21b a special liquid product C adapted to protect the surface of the cylinder 2 in order to prevent excessive overheating, damage, and sparks.
  • the nozzles 7a, 7b of the third series are two in number, one for each one of the two edge zones 22a, 22b.
  • the group of the series 5, 6, 7 of atomizer nozzles 5a-5o, 6a-6o, 7a, 7b forms an apparatus for the distribution of the chemical products, which is generally indicated with the numeral 9 and which is illustrated in detail in Figure 2 .
  • the atomizer nozzles 5a-5o, 6a-6o, 7a, 7b, of the first series 5, of the second series 6 and of the third series 7 (if any), are configured to convey the respective chemical product a, b, c to be dispensed using a vector gas V (preferably air).
  • V preferably air
  • each one of the atomizer nozzles 5a-5o, 6a-6o, 7a, 7b comprises a central dispensing orifice 81 for dispensing a jet of the chemical product a, b, c to be dispensed and two lateral orifices 82, 83 which are configured to dispense two flows of vector gas V which intersect so as to form, together with the jet of the chemical product a, b, c, a conical jet Z that has a preset divergence (i.e. width at a preset distance).
  • a preset divergence i.e. width at a preset distance
  • the resulting conical jet Z is composed of gas (preferably air) atomized with the chemical product which has previously been emulsified in water (since it arrives at the nozzle 5a-5o, 6a-6o, 7a, 7b already emulsified in water).
  • the flow rate of the central orifice 81 is adjustable by way of an internal adjustment needle so that when varying the flow rate of chemical product a, b, c dispensed, the divergence of the conical jet Z remains unchanged. In this manner, and also by varying the flow rate of the individual nozzles 5a-5o, 6a-6o, 7a, 7b in a series 5, 6, 7, the creation is avoided of zones of the surface of the cylinder where the jets overlap, also avoiding the creation of dry zones.
  • each series 5, 6, 7 of atomizer nozzles 5a-5o, 6a-6o, 7a, 7b is fed by a respective conduit 55, 65, 75 for feeding the vector gas V under pressure and by a respective supply conduit of liquid products 51, 61, 71.
  • the conduits 55, 65, 75 for feeding the vector gas V under pressure are fed by a source of pressurized gas 99, for example a compressed air dispensing device.
  • Each one of the supply ducts liquid products 51, 61, 71 is fed by a respective chemical product feeder conduit 53, 63, 73 (originating from a respective tank of product 54, 64, 74) and by a respective water feeder conduit 52, 62, 72 (originating from a source of water 88).
  • each chemical product feeder conduit 53, 63, 73 is provided with a respective variable flow-rate pump 94, 95, 96 for controlling the flow thereof, and each water feeder conduit 52, 62, 72 is provided with a respective flow-rate pump 91, 92, 93 for controlling the flow thereof.
  • each one of the chemical products a, b, c to be dispensed are mixed (preferably emulsified) with water in the respective supply conduit for liquid products 51, 61, 71, preferably by way of a static mixer positioned at the intake of the supply conduit for liquid products 51, 61, 71 where the respective intake ducts of the chemical product 53, 63, 73 and the water supply 52, 62, 72 converge.
  • the apparatus 1 comprises an electronic control system 200 which is operatively connected to the atomizer nozzles 5a-5o, 6a-6o, 7a, 7b (of all the series 5, 6, 7 present) and is configured to selectively vary the flow rate of the individual atomizer nozzles 5a-5o, 6a-6o of the first series 5 and of the second series 6, as a function of at least one process parameter, so as to vary the ratio between the chemical adhesion product b and the chemical release product a and/or the overall quantity of chemical products dispensed along the useful width L as a function of such at least one process parameter.
  • an electronic control system 200 which is operatively connected to the atomizer nozzles 5a-5o, 6a-6o, 7a, 7b (of all the series 5, 6, 7 present) and is configured to selectively vary the flow rate of the individual atomizer nozzles 5a-5o, 6a-6o of the first series 5 and of the second series 6, as a function of at least one process parameter, so as to vary the ratio between the
  • the electronic control system 200 is any conventional programmable information processing device, such as a computer, an electronic controller or the like.
  • such process parameter is at least one among:
  • such at least one parameter comprises a parameter indicative of the vibrations of the creping blade 3, both the rotation speed of the cylinder 2 and at least one chemical or physical parameter indicative of the humidity detected along the width of the paper 90, after the release, such chemical or physical parameter comprising one of the following: humidity profile of the paper 90, grammage profile of the paper 90, thermal profile of the paper 90.
  • the flow rate of the individual nozzles 5a-5o, 6a-6o is varied according to an algorithm that combines the parameter indicative of the vibrations of the creping blade 3, the rotation speed of the cylinder 2, and the chemical or physical parameter indicative of humidity detected along the width of the paper 90.
  • varying the flow rate of the atomizer nozzles 5a-5o of the first series 5 with respect to the flow rate of the atomizer nozzles 6a-6o of the second series 6, or vice versa varies the ratio between the chemical adhesion product b and the chemical release product a.
  • varying the flow rates of one or more atomizers 5a-5o, 6a-6o within a series 5, 6 varies the distribution of adhesion product b or of release product a along the useful width L.
  • the electronic control system 200 can be configured to vary the flow rate of the individual nozzles 5a-5o, 6a-6o within a same series, based on the chemical or physical parameter indicative of the humidity detected along the width of the paper 90 (transverse profile of humidity and/or of grammage and/or of temperature) so as to, for example, increase the chemical adhesion product b in zones where the paper 90 is more humid and reduce it in zones where the paper 90 is drier.
  • M.F Moisture Profile
  • P.a the chemical product a (release) dispensed by the various first nozzles 5
  • P.b the chemical product b (adhesion + modifier) dispensed by the various second nozzles 6,
  • Total Coating indicating the combination of the chemical products dispensed.
  • M.F. indicates the humidity profile detected on the paper (P.R., dot-dash line) and the ideal or target humidity profile (P.T., dashed line)
  • N.F. indicates the flow of chemical products dispensed by the nozzles (F.N.5: flow of product A dispensed by the nozzles of the first series 5; F.N.6: flow of product B dispensed by the nozzles of the second series), and
  • P.S. indicates the various sectors of the paper 90, transversely.
  • the electronic control system 200 can vary the ratio between water and chemical product a, b, c in each supply conduit for liquid products 51, 61, 71 (for example by acting on the pumps 91, 92, 93, 94, 95, 96) and also the pressure of the vector gas in each conduit 55, 65, 75 for feeding the vector gas V.
  • the electronic control system 200 is operatively connected to these as well and is configured to vary the flow rate of these nozzles 7a, 7b preferably as a function of the parameters indicative of the vibration of the creping blade 3 detected by the second vibration sensors 32, 33 at the respective edge zones 22a, 22b outside the useful width L, for example so as to increase the delivery of the special product c for the edge zones as the vibrations at the lateral portions of the creping blade 3 increase.
  • the method for the production of tissue paper 90 using a single-cylinder machine 10 that comprises a dryer cylinder or dryer cylinder 2 comprises:
  • the at least one liquid product a, b, c comprises at least: a chemical adhesion product b adapted to facilitate the adhesion of the paper on the work surface 21 of the cylinder 2 and a chemical release product a adapted to facilitate the release of the paper 90 from the work surface 21 of the cylinder 2.
  • the quantity and/or the composition of the liquid product is adjusted as a function of the at least one process parameter.
  • the at least one liquid product is distributed by way of:
  • the distribution step of the flow rate of the individual atomizer nozzles 5a-5o, 6a-6o of the first series 5 and of the second series 6 is selectively varied as a function of the at least one process parameter, so as to vary the ratio between the chemical adhesion product b and the chemical release product a and/or the overall quantity of chemical products dispensed along the useful width L as a function of the at least one process parameter.
  • the chemical release product a is based on vegetable, mineral or synthetic oils.
  • the chemical adhesion product b is based on polymeric chains.
  • the chemical modifier product is based on mono-ammonium phosphate salts or diammonium phosphate salts.
  • FIG 5 is a schematic diagram of an apparatus for the production of tissue paper, according to the invention, that comprises a single-cylinder machine 10 which comprises a dryer cylinder 2.
  • a single-cylinder machine 10 which comprises a dryer cylinder 2.
  • Figure 5 as in Figure 1 and Figure 8 , for the sake of simplicity only one of the two series of nozzles is shown.
  • Another advantage of the method and of the apparatus, according to the invention consists in that they make it possible to correct the variability of humidity of the paper produced across the width, by acting on the adjustment of the thickness and of the hardness of the coater on the Yankee cylinder, which entails an improvement of the humidity profile of the sheet and as a consequence of the creping.
  • Another advantage of the method and of the apparatus, according to the invention consists in that they make it possible to minimize the technical problems deriving from the friction of the creping blade on the surface of the cylinder.
  • Another advantage of the method and of the apparatus, according to the invention consists in decreasing the impact of human error and of the abilities of the operator on the quality of the product obtained.
  • Another advantage of the method and of the apparatus, according to the invention consists in being economically advantageous in terms of energy costs and chemical products and water used, and also of reduction of production discards.

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Claims (14)

  1. Ein Verfahren für die Produktion von Tissue-Papier (90) mit einem Quadratmetergewicht von weniger als 100 g/m2 mit Hilfe einer Einzylindermaschine (10), die einen Yankee-Zylinder oder Trocknungszylinder (2) umfasst; Folgendes umfassend:
    - einen Verteilschritt für mindestens ein flüssiges Produkt auf mindestens einer Arbeitsfläche (21) des Zylinders (2), der eine Nutzbreite (L) hat, die ausgebildet ist, um von dem Papier (90) bedeckt zu werden;
    - einen Trocknungsschritt des Papiers (90) auf der Arbeitsfläche (21) des Zylinders (2), wobei mindestens ein chemisches Produkt dazwischen angebracht ist;
    - einen Lösungsschritt des Papiers (90) von der Arbeitsfläche (21) des Zylinders (2) mit Hilfe eines Kreppschabers (3);
    - einen Erfassungsschritt mindestens eines Prozessparameters;
    wobei das mindestens eine flüssige Produkt mindestens Folgendes umfasst: ein chemisches Adhäsionsprodukt (b), ausgebildet, um die Adhäsion des Papiers an der Arbeitsfläche des Zylinders zu erleichtern, und ein chemisches Ablösungsprodukt (a), ausgebildet, um die Ablösung des Papiers (90) von der Arbeitsfläche (21) des Zylinders (2) zu erleichtern;
    und wobei in dem Verteilschritt die Menge und/oder die Zusammensetzung des flüssigen Produkts in Abhängigkeit von dem mindestens einen Prozessparameter angepasst werden;
    dadurch gekennzeichnet, dass in dem Verteilschritt für das flüssige Produkt das mindestens eine flüssige Produkt verteilt wird durch:
    eine erste Reihe (5) erster Zerstäuberdüsen (5a-5o), die das chemische Ablösungsprodukt (a) mindestens über die gesamte Nutzbreite (L) abgeben, wobei sie es mit Hilfe eines Vektorgases (V) transportieren,
    und eine zweite Reihe (6) zweiter Zerstäuberdüsen (6a-6o), die das chemische Adhäsionsprodukt (b) gemeinsam mit einem chemischen Modifikationsmittel, das ausgebildet ist, um die Oberfläche des Zylinders zu schützen und die Härte des chemischen Adhäsionsprodukts (b) zu modifizieren, mindestens über die gesamte Nutzbreite (L) abgeben, wobei sie es mit Hilfe eines Vektorgases (V) transportieren;
    wobei in dem Verteilschritt die Durchflussrate der einzelnen Zerstäuberdüsen (5a-5o, 6a-6o) der ersten Reihe (5) und der zweiten Reihe (6) in Abhängigkeit von dem mindestens einen Prozessparameter selektiv verändert wird, um so das Verhältnis zwischen dem chemischen Adhäsionsprodukt (b) und dem chemischen Ablösungsprodukt (a) und/oder die Gesamtmenge chemischer Produkte (a, b, c), die über die Nutzbreite (L) abgegeben werden, in Abhängigkeit von dem mindestens einen Prozessparameter zu verändern.
  2. Das Verfahren gemäß Anspruch 1, worin der Prozessparameter mindestens eines von Folgendem ist:
    - einem Parameter, der die Schwingungen des Kreppschabers (3), vorzugsweise die Frequenz und/oder die Intensität der Schwingungen, darstellt;
    - der Rotationsgeschwindigkeit des Zylinders (2);
    - dem Feuchteprofil des Papiers (90), erfasst über die Breite des Papiers (90) nach dem Lösen;
    - dem Flächengewichtsquerprofil des Papiers (90), erfasst über die Breite des Papiers (90) nach dem Lösen;
    - dem thermischen Profil des Papiers über die Breite des Papiers (90), erfasst mit einer Wärmebildkamera (66) nach dem Lösen.
  3. Das Verfahren gemäß Anspruch 1 oder 2, worin der Prozessparameter einen Parameter umfasst, der die Schwingungen des Kreppschabers (3), die Rotationsgeschwindigkeit des Zylinders (2) und einen chemischen oder physikalischen Parameter anzeigt, welcher die Feuchtigkeit anzeigt, die über die Breite des Papiers (90) nach dem Lösen erfasst wird,
    wobei der chemische oder physikalische Parameter mindestens eines von dem Feuchteprofil des Papiers (90), dem Flächengewichtsquerprofil des Papiers (90) und dem thermischen Profil des Papiers (90) umfasst
    und wobei die Durchflussrate der einzelnen Düsen (5a-5o, 6a-6o) nach einem Algorithmus verändert wird, welcher die Parameter kombiniert, die die Schwingungen des Kreppschabers (3), die Rotationsgeschwindigkeit des Zylinders (2) und die chemischen oder physikalischen Parameter anzeigen, die über die Breite des Papiers (90) erfasst werden.
  4. Das Verfahren gemäß einem oder mehreren der obigen Ansprüche, wobei der mindestens eine Prozessparameter mindestens Folgendes umfasst:
    - einen ersten Parameter, welcher die Schwingung des Kreppschabers (3) anzeigt, die an einem zentralen Abschnitt des Kreppschabers (3) erfasst wird, der in Kontakt mit der Arbeitsfläche (21) des Zylinders (2) innerhalb der Nutzbreite (L) positioniert ist, und
    - zwei zweite Parameter, welche die Schwingung des Kreppschabers (3) anzeigen, die an zwei jeweiligen Seitenabschnitten des Kreppschabers (3) erfasst wird, die in Kontakt mit dem Zylinder (2) an entsprechenden Randzonen (22a, 22b) außerhalb der Nutzbreite (L) angeordnet sind;
    und wobei in dem Verteilschritt auch ein flüssiges Produkt (C) abgegeben wird, welches geeignet ist, die Oberfläche des Zylinders (2) an den Randzonen (21a, 21b) des Zylinders zu schützen, in Abhängigkeit von den zweiten Parametern, die die Schwingung anzeigen, über eine dritte Reihe (7) von Zerstäuberdüsen (7a, 7b), welche mindestens eine Zerstäuberdüse (7a, 7b) für jede der beiden Randzonen (22a, 22b) umfasst.
  5. Das Verfahren gemäß einem oder mehreren der obigen Ansprüche, worin in jeder der Zerstäuberdüsen (5a-5o, 6a-6o, 7a, 7b) die Durchflussrate verändert wird durch Verändern der Durchflussrate eines zentralen Düsenstrahls des chemischen Produkts (a, b, c), emulgiert in Wasser, der gemischt wird mit zwei seitlichen Cross-Jets von Vektorgas (V), einen kegelförmigen Strahl (Z) aus Zerstäubergas mit dem chemischen Produkt bildend, so dass beim Verändern der Durchflussrate der Düse (5a-5o, 6a-6o, 7a, 7b) die Aufweitung des kegelförmigen Strahls unverändert bleibt.
  6. Das Verfahren gemäß einem oder mehreren der obigen Ansprüche, worin
    das chemische Ablösungsprodukt (a) auf pflanzlichen, mineralischen oder synthetischen Ölen basiert,
    das chemische Adhäsionsprodukt (b) auf Polymerketten basiert und
    das chemische Modifikationsmittel auf Monoammoniumphosphatsalzen oder Diammoniumphosphatsalzen basiert.
  7. Eine Vorrichtung (1) zur Produktion von Tissue-Papier mit einem Quadratmetergewicht von weniger als 100 g/m2, die Folgendes umfasst:
    - eine Einzylindermaschine (10), die einen Yankee-Zylinder oder Trocknungszylinder (2) umfasst, der eine Arbeitsfläche (21) mit einer Nutzbreite (L) hat, die ausgebildet ist, um von dem Papier (90) bedeckt zu werden,
    - einen Kreppschaber (3), ausgebildet, um das Papier von der Arbeitsfläche (21) des Zylinders (2) zu lösen,
    dadurch gekennzeichnet, dass sie Folgendes umfasst:
    - eine erste Reihe (5) erster Zerstäuberdüsen (5a-5o) zur Abgabe eines chemischen Ablösungsprodukts (a) auf die Oberfläche des Zylinders (2) über mindestens die gesamte Nutzbreite (L), die ausgebildet sind, um das chemische Ablösungsprodukt (a) mit Hilfe eines Vektorgases (V) zu transportieren,
    - eine zweite Reihe (6) zweiter Zerstäuberdüsen (6a-6o) zur Abgabe eines chemischen Adhäsionsprodukts (b), gemischt mit einem chemischen Modifikationsmittel, ausgebildet, um die Oberfläche des Zylinders zu schützen und die Härte des chemischen Adhäsionsprodukts (b) auf der Oberfläche des Zylinders (2) über mindestens die gesamte Nutzbreite (L) zu modifizieren; wobei die zweiten Zerstäuberdüsen (6a-6o) ausgebildet sind, um das chemische Adhäsionsprodukt (b) und das chemische Modifikationsmittel mit Hilfe eines Vektorgases (V) zu transportieren,
    - ein elektronisches Steuerungssystem (200), welches operativ mit den Zerstäuberdüsen (5a-5o, 6a-6o, 7a, 7b) verbunden und ausgebildet ist, um die Durchflussrate der einzelnen Zerstäuberdüsen (5a-5o, 6a-6o) der ersten Reihe (5) und der zweiten Reihe (6) in Abhängigkeit von mindestens einem Prozessparameter selektiv zu verändern, um so das Verhältnis zwischen dem chemischen Adhäsionsprodukt (b) und dem chemischen Ablösungsprodukt (a) und/oder die Gesamtmenge chemischer Produkte, die über die Nutzbreite (L) abgegeben werden, in Abhängigkeit von dem mindestens einen Prozessparameter zu verändern.
  8. Die Vorrichtung (1) gemäß Anspruch 7, dadurch gekennzeichnet, dass sie einen oder mehrere Schwingungssensoren (31, 32, 33) umfasst, die ausgebildet sind, um die Schwingungen des Kreppschabers (3) zu erfassen, und die operativ mit dem elektronischen Steuerungssystem (200) verbunden sind;
    wobei das elektronische Steuerungssystem (200) ausgebildet ist, um die Durchflussrate der Zerstäuberdüsen (5a-5o, 6a-6o, 7a, 7b) in Abhängigkeit von mindestens den von den Schwingungssensoren (31, 32, 33) erfassten Werten zu verändern.
  9. Die Vorrichtung (1) gemäß Anspruch 8, wobei die einen oder mehreren Schwingungssensoren (31, 32, 33) Folgendes umfassen:
    - einen ersten Schwingungssensor (31), positioniert, um die Schwingungen an einem zentralen Abschnitt des Kreppschabers (3) zu erfassen, der in Kontakt mit der Arbeitsfläche (21) des Zylinders (2) innerhalb der Nutzbreite (L) positioniert ist, und
    - zwei zweite Schwingungssensoren (32, 33), positioniert, um die Schwingungen an zwei jeweiligen Seitenabschnitten des Kreppschabers (3) zu erfassen, die in Kontakt mit dem Zylinder (2) an entsprechenden Randzonen (22a, 22b) außerhalb der Nutzbreite (L) angeordnet sind.
  10. Die Vorrichtung (1) gemäß Anspruch 9, die außerdem eine dritte Reihe (7) von Zerstäuberdüsen (7a, 7b) umfasst, welche mindestens eine Zerstäuberdüse (7a, 7b) für jede der beiden Randzonen (22a, 22b) des Zylinders (2) umfasst, die ausgebildet ist, um auf den Randbereich (21a, 21b) ein flüssiges Produkt (C) abzugeben, das geeignet ist, die Oberfläche des Zylinders (2) zu schützen; wobei das elektronische Steuerungssystem (200) ausgebildet ist, um die Durchflussrate der Zerstäuberdüsen (7a, 7b) der dritten Reihe (7) in Abhängigkeit von mindestens den von den zweiten Schwingungssensoren (32, 33) erfassten Werten zu ändern.
  11. Die Vorrichtung (1) gemäß einem oder mehreren der Ansprüche 7 bis 10, dadurch gekennzeichnet, dass sie eine Abtastvorrichtung (8) umfasst, ausgebildet, um ein Feuchteprofil und/oder ein Flächengewichtsquerprofil des Papiers (90) über die Breite des Papiers (90) stromabwärts vom Zylinder (2) zu erfassen; wobei das elektronische Steuerungssystem (200) ausgebildet ist, um die Durchflussrate der Zerstäuberdüsen (5a-5o, 6a-6o, 7a, 7b) in Abhängigkeit von mindestens den von der Abtastvorrichtung (8) erfassten Werten zu verändern.
  12. Die Vorrichtung (1) gemäß einem oder mehreren der Ansprüche 7 bis 11, dadurch gekennzeichnet, dass sie eine Wärmebildkamera (66) umfasst, ausgebildet, um ein thermisches Profil des Papiers (90) über die Breite des Papiers (90) stromabwärts vom Zylinder (2) zu erfassen; wobei das elektronische Steuerungssystem (200) ausgebildet ist, um die Durchflussrate der Zerstäuberdüsen (5a-So, 6a-6o, 7a, 7b) in Abhängigkeit von mindestens den von der Wärmebildkamera (66) erfassten Werten zu verändern.
  13. Die Vorrichtung (1) gemäß einem oder mehreren der Ansprüche 7 bis 12, wobei jede der Zerstäuberdüsen (5a-5o, 6a-6o, 7a, 7b) eine zentrale Abgabeöffnung (81) für die Abgabe eines Düsenstrahls des abzugebenden chemischen Produkts (a, b, c) und zwei Seitenöffnungen (82, 83) umfasst, die ausgebildet sind, um zwei Ströme von Vektorgas (V) abzugeben, die sich schneiden, um, gemeinsam mit dem Düsenstrahl des chemischen Produkts (a, b, c), einen kegelförmigen Düsenstrahl (Z) mit einer vordefinierten Aufweitung zu bilden;
    wobei die Durchflussrate der zentralen Öffnung (81) mit Hilfe einer internen Einstellnadel anpassbar ist, so dass beim Verändern der Durchflussrate des abgegebenen chemischen Produkts die Aufweitung des kegelförmigen Düsenstrahls (Z) unverändert bleibt.
  14. Die Vorrichtung (1) gemäß einem oder mehreren der Ansprüche 7 bis 13, wobei jede der Reihe (5, 6, 7) von Zerstäuberdüsen von einer entsprechenden Leitung (55, 65, 75) zum Zuführen des unter Druck stehenden Vektorgases (V) und von einer entsprechenden Versorgungsleitung für flüssige Produkte (51, 61, 71) gespeist wird,
    wobei jede der Versorgungsleitungen für flüssige Produkte (51, 61, 71) von einer entsprechenden Speiseleitung (53, 63, 73) für chemische Produkte und von einer entsprechenden Wasser-Speiseleitung (52, 62, 72) gespeist wird.
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