EP3808896B1 - Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon - Google Patents

Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon Download PDF

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Publication number
EP3808896B1
EP3808896B1 EP19203522.8A EP19203522A EP3808896B1 EP 3808896 B1 EP3808896 B1 EP 3808896B1 EP 19203522 A EP19203522 A EP 19203522A EP 3808896 B1 EP3808896 B1 EP 3808896B1
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EP
European Patent Office
Prior art keywords
value
paper
process water
grass
added
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19203522.8A
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German (de)
English (en)
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EP3808896A1 (fr
Inventor
Martin PFLUG
Hans WEHRMANN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Papierfabrik Meldorf & Co GmbH KG
Original Assignee
Papierfabrik Meldorf & Co GmbH KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Papierfabrik Meldorf & Co GmbH KG filed Critical Papierfabrik Meldorf & Co GmbH KG
Priority to EP19203522.8A priority Critical patent/EP3808896B1/fr
Priority to DE202019106364.5U priority patent/DE202019106364U1/de
Publication of EP3808896A1 publication Critical patent/EP3808896A1/fr
Application granted granted Critical
Publication of EP3808896B1 publication Critical patent/EP3808896B1/fr
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
    • D21G9/00—Other accessories for paper-making machines
    • 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
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/14—Secondary fibres
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/005—Microorganisms or enzymes
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H21/16—Sizing or water-repelling agents

Definitions

  • the invention relates to a method for producing paper containing waste paper fibers and grass fibers.
  • it relates to a process for the production of paper which is obtained exclusively from waste paper fibers and grass fibers.
  • the starting materials for the production of paper from waste paper and grass fibers if necessary with the addition of fresh fibers, shredded waste paper and grass particles, are first put into a pulper, into which process water is also introduced.
  • a suspension of waste paper and grass particles is formed in the process water in the pulper, which is circulated and made pumpable by means of a whip, while the coarse cargo is crushed.
  • the suspension is then extracted from the pulper, if necessary via a so-called refiner, in which the particulate fractions of the suspension are once more comminuted and defibrated, and also if necessary via sorting to separate out too coarse material, e.g.
  • a paper web is formed on the screen support, which typically runs around in an endless belt, which is separated from the screen support and dried in further steps and, if necessary, further treated, e.g. by means of an application of glue or starch to set a Cobb 60 value, which is a measure of the liquid absorption of the paper and its size, for example with regard to the printability of the finished paper, plays an essential role.
  • the paper web is further dried and wound onto a roll at the end of the manufacturing process.
  • biocides are added to the process water in paper manufacture to prevent the formation and / or increase of process-damaging To prevent microorganisms in the process water or in the paper machine and thus to avoid the problems described above.
  • biocide is viewed critically from an environmental point of view. They can be discharged from the paper machine with the wastewater and thus get into the environment.
  • Biocides and their use in the production of paper containing grass fibers which is also known as "grass paper” and which also enjoys a special reputation from an ecological point of view, are especially to be assessed as sustainable and from an ecological point of view better than, for example, paper made from fresh fibers viewed critically, as these biocides in turn result in a poorer assessment of the life cycle assessment of the paper produced in this way.
  • the toilet paper which can contain grass fibers, should help to quickly remove unpleasant smells after using the toilet and to kill pathogenic bacteria.
  • probiotic bacteria are added to the toilet paper, which are introduced into the pulp during its production.
  • the DE 20 2018 104 195 U1 describes a print carrier for use in offset printing.
  • This print carrier is formed by paper or cardboard which contains a proportion of grass fibers in the fiber material composition.
  • the aim of the invention is to provide a production method for paper containing waste paper fibers and grass fibers that can dispense with the use of biocides in the process water.
  • a mass with waste paper fibers provided by the waste paper material introduced into the pulper and grass fibers provided by the grass material introduced into the pulper is deposited onto at least one carrier screen, e.g. in the form of a screen support, which can also be a continuous endless belt, with separation of at least part of the process water, applied to form a paper web.
  • the further work steps known per se can be carried out, such as further processing of the fibers in a refiner, separation of excessively coarse material in sieves or sorting baskets or the like.
  • a part of the process water separated when the mass is applied to the carrier screen is returned for renewed introduction into the pulper.
  • this process water is originally obtained from fresh water, which fresh water has a pH value in the range from 7.0 to 8.5.
  • biocides are not added to the process water, as is otherwise usual in the prior art, but rather probiotic bacteria.
  • probiotic bacteria prevent or at least block the formation and / or the reproduction and / or the growth of process-damaging microorganisms, for example by depriving them of their nutrients or colonizing the available habitat and thus depriving the process-damaging microorganisms of settling.
  • a product from the PIP Aquatec series from the Belgian supplier Chrisal NV which is an agent based on probiotic bacteria, can be used for the purposes described here.
  • the pH of the process water is also monitored. Because without using a biocide and using probiotic bacteria in its place, there can still be a change, in particular a drop in the pH value, which, as mentioned above, affects the manufacturing process and possibly also the paper produced is disadvantageous. Thus, according to the method according to the invention, if the pH value has been found to fall below a threshold value, an increased dose of a basic agent is added in order to adjust the pH value of the process water to a target value and to keep the pH value at the target value .
  • a pH value is set for the process water which, on the one hand, allows the probiotic bacteria to be active, but on the other hand does not drop into such a low value range that the problems described above are caused.
  • the threshold value of the pH value is selected to be at least 0.2, in particular at least 0.3, greater than the target value. This is done because it has been shown that an early introduction of the basic agent and therefore timely countermeasures against over-acidification of the process water are necessary in order to be able to reliably set the pH value to the target value. Contrary to what was initially expected, it has been shown that counteracting by adding the basic agent does not allow this target value to be reached until the target value for the pH value is in the immediate vicinity. Then, despite the addition of the basic agent, the acid content of the process water surprisingly gets out of control, leading to an uncontrolled drop in the pH value well below the target value.
  • the addition of a basic agent in increased dosage means that if a basic agent is added in a "basic amount" anyway to control the pH, the amount of the basic agent added is increased accordingly. If, however, no basic agent is added in the basic setting, the increased dosage can also indicate the beginning of the addition of the basic agent at all.
  • probiotic bacteria may have to be replenished and added to the process water.
  • Regular, in any case repeated or even continuous addition of the basic agent may also be necessary in order to be able to carry out continuous operation and continuous production of paper by the process according to the invention.
  • the target value is selected at a pH of 6.5 to 7.0.
  • it can be pH 6.7.
  • the problems otherwise observed when the pH value is lowered, as described at the beginning, are avoided, and the probiotic bacteria are particularly effective against the process-damaging microorganisms.
  • the threshold value from which the basic agent is added must be at least 0.2 above the target value for the pH. However, it should also advantageously not be too high above the target value, in order not to have premature addition of the basic agent.
  • the threshold value can be at most 0.5 higher than the target value for the pH value of the process water.
  • the invention advantageously proposes using milk of lime for this purpose.
  • fresh water can be fed to the process water to replenish its volume.
  • part of the process water is always drained from the paper machine and ends up in the wastewater.
  • This "loss" of process water can be compensated for by adding fresh water accordingly.
  • the supply of fresh water can also have an influence on the management of the pH value of the process water, since fresh water will typically have a higher pH value than the process water that is already in use.
  • Fresh water that is added to the process water can typically have a pH of 7.0 to 8.5.
  • the monitoring of the pH value of the process water can in particular take place continuously, in particular with a pH probe. This allows seamless, close-knit monitoring and thus timely and targeted intervention by adding the basic agent when the threshold value for the pH value is reached.
  • the pH value can also be monitored by means of individual measurements made at predetermined intervals.
  • a solution containing glue and / or starch dissolved in water can be applied to the paper web formed. This can take place, for example, in a so-called application of glue or starch.
  • glue or starch also requires water for the formation of the solution, this water usually being separate from the process water of the other paper machine.
  • the solution is typically applied at an elevated temperature, for example 135.degree.
  • glue and starch in particular bring with them a considerable input of nutrients for harmful microorganisms and, in the area of the glue or starch application, correspondingly increased temperatures also favor the growth of microorganisms, there is also a considerable problem in the glue or starch application and the associated machine parts with the formation and growth of such microorganisms and the consequences outlined above.
  • biocide is also used at this point in conventional paper machines and added to the solution or to the water used for this.
  • probiotic bacteria but not biocides
  • the pH value of the solution can be monitored will. If the pH value of the solution falls, in particular to a value below 4.5, a warning can advantageously be output so that measures can be taken to set a higher pH value.
  • fresh fibers cellulose fibers that are not obtained from waste paper, but from fresh material are
  • paper is produced using exclusively recovered paper fibers and grass fibers, and without using fresh cellulose fibers.
  • the grass fibers used can in particular be fibers which are obtained by appropriate processing from dried, semi-dried or fresh sweet and / or sour grass and / or seaweed and / or algae.
  • the figure which is a purely schematic representation, illustrates how the addition of the basic agent (the amount added per unit of time is shown as a curve over time in the lower representation with a dotted line) is carried out in an increased dose when the pH Value (the time course of which is shown in the upper illustration in a dashed line) is still above the target value drawn in as a continuous line in the upper illustration (also referred to as the target value in the figure).
  • the pH value reaches the threshold value, which is a value of at least 0.2, preferably at least 0.3 above the target value (target value), and the addition of the basic agent with increased dosage is initiated.
  • the target value for the pH value of the process water can be, for example, pH 6.5 to pH 7.

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  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Paper (AREA)

Claims (10)

  1. Procédé pour la production de fibres de vieux papiers et de papier contenant des fibres d'herbe obtenues par traitement à partir d'herbe séchée, semi-séchée ou fraîche et/ou d'herbe aigre et/ou d'algues, dans lequel le matériau de vieux papiers et le matériau d'herbe ainsi que l'eau de traitement sont introduits dans un pulpeur et une masse comprenant des fibres de vieux papiers fournies par le matériau de vieux papiers introduit dans le pulpeur et des fibres d'herbe fournies par le matériau d'herbe introduit dans le pulpeur est appliquée sur au moins une toile de support avec séparation d'au moins une partie de l'eau de traitement afin de former une bande de papier, dans lequel au moins une partie de l'eau de traitement est recyclée pour une nouvelle introduction dans le triturateur, dans lequel l'eau de traitement est obtenue à l'origine à partir d'eau douce ayant un pH dans la gamme de 7.0 à 8,5, dans lequel des bactéries probiotiques, mais pas de biocides, sont ajoutées à l'eau de traitement pour au moins une réduction d'une formation de micro-organismes nuisibles au traitement, sont ajoutées à l'eau de traitement pour au moins une réduction d'une formation de micro-organismes nuisibles au traitement, et dans lequel la valeur du pH de l'eau de traitement est surveillée et, si une chute de la valeur du pH en dessous d'une valeur seuil est détectée, un agent basique est ajouté en dosage accru afin d'obtenir un ajustement de la valeur du pH de l'eau de traitement à une valeur cible de 6.5 à 7,0 et de maintenir la valeur du pH à cette valeur cible, dans lequel la valeur seuil de la valeur du pH est au moins 0,2, en particulier au moins 0,3, supérieure à la valeur cible.
  2. Procédé selon la revendication 1, caractérisé en ce que la valeur seuil du pH est supérieure à la valeur cible d'au plus 0,5.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on ajoute du lait de chaux comme agent de base.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'on ajoute de l'eau fraîche à l'eau de traitement pour en reconstituer le volume.
  5. Procédé selon la revendication 4, caractérisé en ce que l'eau douce fournie a une valeur de pH de 7,0 à 8,5.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que la valeur du pH de l'eau de traitement est surveillée en continu, notamment à l'aide d'une sonde pH.
  7. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que le contrôle de la valeur du pH est effectué au moyen de mesures individuelles prises à des intervalles de temps prédéterminés.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'une solution contenant de la colle et/ou de l'amidon dissous dans de l'eau est appliquée à la bande de papier formée pour ajuster une valeur Cobb60 du papier, dans lequel des bactéries probiotiques, mais pas de biocides, sont ajoutées à la solution pour au moins une réduction d'une formation de micro-organismes endommageant le processus, et en ce que la valeur du pH de la solution est surveillée.
  9. Procédé selon la revendication 8, caractérisé en ce qu'un avertissement est émis si la valeur du pH de la solution descend en dessous de 4,5.
  10. Procédé selon l'une des revendications précédentes, caractérisé en ce que le papier est produit en utilisant uniquement des fibres de vieux papiers et des fibres d'herbe, en particulier sans utiliser de fibres de cellulose fraîches.
EP19203522.8A 2019-10-16 2019-10-16 Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon Active EP3808896B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19203522.8A EP3808896B1 (fr) 2019-10-16 2019-10-16 Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon
DE202019106364.5U DE202019106364U1 (de) 2019-10-16 2019-11-15 Papiermaschine für die Herstellung von Altpapier- und Grasfasern enthaltendem Papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19203522.8A EP3808896B1 (fr) 2019-10-16 2019-10-16 Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon

Publications (2)

Publication Number Publication Date
EP3808896A1 EP3808896A1 (fr) 2021-04-21
EP3808896B1 true EP3808896B1 (fr) 2021-12-01

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EP19203522.8A Active EP3808896B1 (fr) 2019-10-16 2019-10-16 Procédé de fabrication de papier contenant des vieux papiers et des fibres de gazon

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DE (1) DE202019106364U1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5965128A (en) * 1997-08-13 1999-10-12 University Of Georgia Research Foundation Inc. Control of enterohemorrhagic E. coli 0157:H7 in cattle by probiotic bacteria and specific strains of E. coli
JP5585882B2 (ja) * 2007-12-05 2014-09-10 シャンドング フユイン ペーパー アンド エンヴァイロンメンタル プロテクション テクノロジー カンパニー，リミテッド 原色紙製品とその製造方法
US20090197089A1 (en) * 2008-01-31 2009-08-06 Joel Klippert Compact laminate having powder coated surface
DE202012002588U1 (de) * 2012-03-13 2013-06-17 Uwe D'Agnone Graspapier
US9908680B2 (en) * 2012-09-28 2018-03-06 Kimberly-Clark Worldwide, Inc. Tree-free fiber compositions and uses in containerboard packaging
CN104278593A (zh) * 2013-07-11 2015-01-14 罗福仲 含有益生菌的除臭卫生纸及其加工方法
CN108530545A (zh) * 2017-03-03 2018-09-14 重庆市曾东燃纳米科技合伙企业（有限合伙） 一种纳米纤维素及其制备方法
DE202018104195U1 (de) * 2018-07-20 2018-07-30 Uwe D'Agnone Druckträger für den Einsatz im Offsetdruck
DE202019100702U1 (de) * 2019-01-15 2019-02-25 Papierfabrik Meldorf GmbH & Co. Kommanditgesellschaft Mehrlagiges Altpapier- und Grasfasern enthaltendes Papier

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
DE202019106364U1 (de) 2019-11-21
EP3808896A1 (fr) 2021-04-21

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