EP4018033B1 - Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe - Google Patents

Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe Download PDF

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Publication number
EP4018033B1
EP4018033B1 EP20758177.8A EP20758177A EP4018033B1 EP 4018033 B1 EP4018033 B1 EP 4018033B1 EP 20758177 A EP20758177 A EP 20758177A EP 4018033 B1 EP4018033 B1 EP 4018033B1
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EP
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Prior art keywords
grass
pulp
zostera
fibre material
meadow
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EP20758177.8A
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German (de)
English (en)
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EP4018033C0 (fr
EP4018033A1 (fr
Inventor
Uwe D'agnone
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Creapaper GmbH
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Creapaper GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D1/00—Methods of beating or refining; Beaters of the Hollander type
    • D21D1/20—Methods of refining
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam

Definitions

  • the present invention relates to a method for processing grass fibers, such as dried grass fibers (hay), in particular for processing a fiber mixture containing grass fibers and the use of these grass fibers / fiber mixture for the production of grass-containing paper, paperboard or cardboard, packaging material, filling and/or insulating material.
  • grass fibers such as dried grass fibers (hay)
  • hay dried grass fibers
  • Grass fibers in the context of the present invention are essentially complete plant parts, for example made from sweet grass, which are produced by preferably, but not exclusively, mechanical processes such as cutting, drying and/or compacting and for the production of paper , cardboard or cardboard are provided.
  • the problem here is that grass fibers are preferably annual plants whose usable plant parts are mechanically relatively sensitive and can suffer greatly, especially in the processing of paper production.
  • This means, among other things, that the suspended grass fibers are severely shortened in the event of heavy grinding and/or dispersing, whereby this is not only done directly by cutting, but also by breaking the relatively brittle and sensitive fibers during processing.
  • the fibers are too short and less useful for papermaking because they can provide too little active surface area and strength-enhancing binding properties.
  • DE 10 2012 107193 A relates to a fiber composition with a predetermined proportion of fresh fibers and/or waste paper, sweet grass and/or sour grass fibers, and auxiliary materials and water.
  • DE 2020 18107331 U1 relates to a drinking straw made from a wound paper layer formed from a semi-opaque, highly refined pulp.
  • the pulp can be formed from pulp and grass fibers.
  • EP 2 982 740 A1 relates to a process for the production of methane.
  • the object of the present invention is to provide grass fibers for papermaking, in which an improved binding potential can be provided for a given fiber length, which can also be used in papermaking for improved strength of the fibrous material produced with it.
  • This object is achieved by the method for processing the grass fibers according to claim 1 and the use of the fibers processed in this way for the production of types of paper, paperboard or cardboard containing grass.
  • the beating resistance of the second fiber type is at least 10%, preferably 50% higher than the beating resistance of the first fiber type.
  • the proportion of the first type of fiber in the finished paper is between 10% and less than 100%, preferably between 20% and 60% and in particular between 30% and 70%, and the respective remainder of fibers in the finished paper consists of fibers of the second pulp grade.
  • the beating resistance of which differs it can be ensured that the fibrous material fraction that has a low beating resistance is protected by the "hard” fibrous material during beating and/or dispersing in such a way that, if possible, a strong reduction of the Fiber avoided and thus the grinding energy is better used to achieve fibrillating grinding, ie surface enlargement. In particular, this can also prevent the less beating-resistant fibrous material from significantly losing its strength potential.
  • the beating resistance is measured, among other things, as a ratio of the beating energy, for example determined by the specific grinding edge load in kWh/t and the changed fibrous material characteristics, such as the specific fibrous material strength in kmRl (kilometers breaking length) or N/ 15mm and/or the dewatering capacity in °SR or %.
  • Short-fiber pulp (hardwood) has shorter and thinner fibers than long-fiber pulp (softwood) and their resistance to beating is lower.
  • Secondary fibers also have a relatively low resistance to beating, as a large proportion of the fibers have already been beaten.
  • the grinding resistance ie how much energy or time has to be used for grinding, in order to achieve a specified degree of grinding.
  • the specific paper and/or pulp properties are preferably determined according to the usual standards such as longitudinal breaking strength in N/15mm DIN EN 1924/2 52.1; Breaking strength across in N/ 15mm DIN EN 1924/2 32.5; Schopper-Riegler freeness test in °SR DIN ISO 5267-1; Canadian Standard Freeness method according to ISO 5267/2; SCAN C21; TAPPI 227 determined
  • the grass fibers are provided as compacted fibers before processing.
  • Compacting is preferably a process in which the grass fibers are compacted and provided as storage-stable pellets be pre-assembled for the intended application in paper manufacture. This can include cutting, sifting, classifying, cleaning and/or drying.
  • the pellets can also have different shapes and are not limited to a basic cylindrical shape.
  • the degree of compaction can also be adapted to the respective application, with the corresponding compaction bringing with it the advantage that the suspension of such grass fibers in pellet form is improved, since the pellets fall to the bottom of the pulper - which is proportionately filled with water - sink and then slightly suspended with a mixer arranged on the floor, ie the fibers can be separated.
  • the first fiber type from a group which includes spike grasses, bluegrasses and spike grasses, as well as sedge plants of the genera Poaceae, and Cyperaceae, in particular grasses of the subfamilies Anomochlooideae , Pharoideae, Puelioideae, Bambusoideae, Ehrhartoideae, Pooideae, such as tribe Aveneae, tribe Poeae, tribe Triticeae Aristidoideae, Danthonioideae, Arundinoideae, Chloridoideae, Centothecoideae, Panicoideae such as Saccarum officinarum and Micrairoideae and in particular Agrostis canina - Bentgrass; Agrostis capillaris - Bent Grass; Agrostis stolonifera - Bent Grass; Agrostis vinealis -
  • Rchb. Zostera asiatica Miki, Zostera caespitosa Miki, Zostera capensis Setch., Zostera capricorni Asch., Zostera caulescens Miki, Zostera japonica Asch.
  • plants as additional fiber for the first type of fiber, silphie (Silphium perfolatium), since, in addition to the simple and diverse cultivation method, the plant can be made available in large quantities as a permanent culture and its fibers are well suited for paper production due to their composition and mechanical properties. Due to the short growth phase, these plant fibers are also sensitive to mechanical processing and can be processed gently for paper production with the present mixed grinding process.
  • the second furnish is selected from a group of furnishes which include natural pulps such as cotton, mechanical pulp (RMP), chemical mechanical pulp (CRMP or CMP) or chemical thermal pulp (CTMP), pressurized refiner pulp (PRMP), semi-chemical pulp, high-yield chemical Pulp, chemical pulp, alkaline-produced pulp such as sulphate pulp or sulfite pulp, all of the aforementioned fibers as fresh fibers or as well as recycled fibers such as waste paper.
  • natural pulps such as cotton, mechanical pulp (RMP), chemical mechanical pulp (CRMP or CMP) or chemical thermal pulp (CTMP), pressurized refiner pulp (PRMP), semi-chemical pulp, high-yield chemical Pulp, chemical pulp, alkaline-produced pulp such as sulphate pulp or sulfite pulp, all of the aforementioned fibers as fresh fibers or as well as recycled fibers such as waste paper.
  • RMP mechanical pulp
  • CMP chemical mechanical pulp
  • CMP chemical thermal pulp
  • PRMP pressurized refiner pulp
  • the grinding is preferably carried out with at least one of the following units, such as in a Dutchman with a power of up to 200 kW, a Papillon refiner with a power of between 100 and 3600 kW, a single-disc refiner, a double-disk refiner, a twin refiner, a flat cone mill, a steep cone mill with a power between 90 and 2800 kW or a disk mill with an output between 315 and 2500 kW. Combinations of the aforementioned units are also within the meaning of the present invention, and these can be used in series or also in parallel or sequentially.
  • the focus of the type of refining is fibrillating refining, in which the surface of the fibers is enlarged and thus their fiber binding capacity and thus also the strength (breaking strength, bursting strength, etc.) of a finished paper or cardboard made from it is improved.
  • the fibrous materials are dispersed prior to beating.
  • At least one further fibrous material from one of the two fibrous material groups is admixed to the mixed ground fibrous material after the beating and/or dispersing.
  • figure 1 a table for the preparation of the experiments, in which, in addition to various fibers, designated as product 1, 2, 3 and 4, the available aids are also listed.
  • the table itself determines the specifications for the two types of paper "graphic paper” and "testliner", with the mass per unit area FM (g/m 2 ), proportion of grass fibers grass (%), eucalyptus fibers eucalyptus, the grinding and the drainage value achieved in this way in °SR, the proportion of long fibers and kraft pulp in % and the addition of starch and AKD glue in %. Information is also given on the use of a size press and the production speed of the laboratory paper machine used
  • the size press surface treatment (height: 6 g/m 2 per side) was carried out the following day.
  • the surface treatment was carried out on the laboratory calender.
  • the grass portion was first treated separately with the grinding unit. This essentially resulted in small splinters - the grass character was essentially lost as a result.
  • the grass fibers are probably refined too much by "cutting", so that too much through-fall (poor retention) occurs during sheet formation on the paper machine.
  • the paper only contains about half the planned amount of grass fibers, which means that the percentage entered in the paper sheet could not be realized.
  • the grass stalks are more resistant than the grass leaf and, above a certain level, can no longer be shredded, otherwise the "grass leaf” will be largely destroyed.
  • pulp/grass in a ratio of 1/3, for example, you can achieve gentle fiber-to-fiber friction, which means that the grass fibers are not exposed to large grinding aggregate edge loads.
  • the grass grinding cycles were determined after visual assessment
  • figure 2 shows a comparison of the fiber fines distribution when using joint refining (left) and separate refining (right).
  • the very small distribution of the gas fibers can be seen on the right-hand side, which can only be used to a limited extent for paper production. Larger particles can be seen on the right-hand side, which is due, among other things, to the gentle treatment/grinding of the grass fibers in combination with the other fibers
  • figure 3 shows a comparison of the grass fiber amounts in the distribution comparison between an industrially produced paper (left) with 30% grass fiber content and 80 g/m 2 and on the right the test paper with a grass fiber content of 30% and 90 g/m 2 .
  • figure 4 shows a comparison of the grass fiber amounts in the distribution comparison between an industrially produced printing paper (left) with 30% grass fiber content and 80 g/m 2 and on the right the test liner produced in the test with a grass fiber content of 50% and 90 g/m 2 .
  • figure 5 shows a comparison of the grass fiber amounts in the distribution comparison between an industrially produced test liner (left) with 50% grass fiber content and 90 g/m 2 and on the right the test liner produced in the test with a grass fiber content of 50% and 130 g/m 2 .
  • figure 6 shows a comparison of writing and printing paper enlarged 5 times between an industrially produced paper (left) and the test paper shown on the right.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Claims (9)

  1. Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de matières fibreuses contenant des fibres d'herbes, comprenant les étapes consistant en:
    - la mise à disposition d'une suspension de fibres à partir d'une quantité donnée d'au moins deux variétés de matières fibreuses, dans laquelle
    la première variété de matières fibreuses consiste en fibres d'herbe et
    la seconde variété de matières fibreuses est choisie dans une variété de fibres résistant au broyage qui comprend les pâtes chimiques, telles que les pâtes au sulfate ou les pâtes au sulfite, chacune étant à base de bois à fibres longues ou de bois à fibres courtes, de pulpe de bois et de fibres synthétiques,
    - le mélange et/ou le gonflement des fibres dans la suspension de matières fibreuses dans des conditions spécifiées en ce qui concerne la consistance et la température
    - le broyage simultané des au moins deux variétés de matières fibreuses en une suspension de matières fibreuses,
    la proportion de la seconde variété de matières fibreuses dans la matière sèche est comprise entre 10% et 50%, de préférence entre 20% et 40%, et notamment de l'ordre de 30%, dans lequel
    la résistance au broyage de la seconde variété de matières fibreuses comme rapport entre la charge spécifique du côté du broyage en kWh/t et la résistance spécifique des matières fibreuses en kmRl et/ou la capacité de déshydratation en SR, est au moins de 10%, de préférence 50%, supérieure à la résistance au broyage de la première variété de matières fibreuses.
  2. Procédé selon la revendication 1, qui se caractérise par le fait que la proportion de la première variété de pâte dans le papier obtenu est comprise entre 10% et moins de 100%, de préférence entre 20% et 60% et notamment entre 30% et 70%, et que le résidu respectif de fibres dans le papier obtenu est constitué de fibres de la seconde variété de matières fibreuses.
  3. Procédé selon l'une des revendications précédentes, caractérisée en ce que la première variété de matières fibreuses soit choisie dans un groupe constitué par les graminées auriculaires, les graminées et les graminées auriculaires ainsi que les graminées des genres Poaceae et Cyperaceae, en particulier les graminées des sous-familles Anomochlooideae, Pharoideae, Puelioideae, Bambusoideae, Ehrhartoideae, Pooideae, telles que par exemple Tribus Aveneae, Tribus Poeae, Tribus, Triticeae Aristidoideae, Danthonioideae, Arundinoideae, Chloridoideae, Centothecoideae, Panicoideae, tels que Saccarum officinarum et Micrairoideae et, en particulier, Agrostis canina (agrostide du chien); Agrostis capillaris; Agrostis stolonifera; Agrostis vinealis; Aira caryophyllea; Aira praecox; Alopecurus geniculatus; Alopecurus myosuroides; Alopecurus pratensis, Ammophila arenaria; Anthoxanthum aristatum; Anthoxanthum odoratum; Apera spica-venti; Arrhenatherum elatius; Avena fatua; Avena sativa; Brachypodium pinnatum; Brachypodium sylvaticum; Briza maxima; Briza media; Bromus arvensis; Bromus benekenii; Bromus carinatus; Bromus commutatus; Bromus erectus; Bromus hordeaceus; Bromus inermis; Bromus madritensis; Bromus secalinus; Bromus sterilis; Bromus tectorum; Calamagrostis arundinacea; Calamagrostis epigejo; Catapodium rigidum; Coix lacryma-jobi; Cortaderia selloana; Corynephorus canescens; Cynodon dactylon; Cynosurus cristatus; Dactylis glomerata; Danthonia decumbens; Deschampsia cespitosa; Deschampsia flexuosa; Deschampsia setacea; Digitaria ischaemum; Digitaria sanguinalis; Echinochloa crus-galli; Echinochloa muricata; Elymus caninus; Elymus repens; Eragrostis albensis; Eragrostis curvula; Eragrostis minor; Eragrostis multicaulis; Festuca arundinacea; Festuca filiformis; Festuca gigantea; Festuca pratensis, Festuca rubra; Glyceria fluitans; Glyceria maxima; Helictotrichon pratense; Helictotrichon pubescens; Helictotrichone pubescens; Holcus lanatus; Hordelymus europaeus; Hordeum jubatum; Hordeum murinum; Hordeum vulgare; Koeleria macrantha; Koeleria pyramidata; Lolium multiflorum; Lolium perenne, Lolium remotum; Lolium temulentum; Melica ciliata; Melica nutans ; Melica unifiera; Milium effusum; Miscanthus floridulus; Miscanthus sacchariflorus; Miscanthus sinensis; Miscanthus sinensis 'Variegatus'; Molinia arundinacea; Molinia caerulea; Nardus stricta; Panicum capillare; Panicum miliaceum; Panicum riparia; Pennisetum setaceum; Pennisetum villosum; Phalaris arundinacea; Phalaris canariensis; Phleum phleoides; Phleum pratense; Phragmites australis; Poa annua; Poa bulbosa; Poa chaixii; Poa compressa; Poa nemoralis; Poa palustris; Poa pratensis, Poa trivialis; Polypogon monspeliensis; Puccinellia distans; Secale céréale; Sclerochloa dura; Setaria italica; Setaria pumila; Setaria verticillata; Setaria viridis; Sorghum bicolor; Sorghum halepense; Trisetum flavescens; Triticale; Triticum aestivum; Triticum dicoccon; Triticum durum; Triticum monoccocum; Triticum spelta; Vulpia myuros; Zea mays, herbe des prés, graminées de sport et industrielles telles que, par exemple, Festuca, Lolium perenne, Poa pratensis, Agrosti, graminées acides du genre Carex, leurs combinaisons et les herbiers marins ou les algues sont sélectionnés dans un groupe, qui comprend les genres d'herbiers marins zostera et d'espèce Zostera angustifolia hornem. Rchb, Zostera asiatica Miki, Zostera caespitosa Miki, Zostera capensis Setch, Zostera capricorni Asch, Zostera caulescens Miki, Zostera japonica Asch. & Graebn., Gewöhnliches Seegras; Zostera marina L., Zostera mucronata Hartog, Zostera muelleri Irmisch ex Asch, Zostera noltii Hornem., Zostera novazelandica Setch., Zostera tasmanica M. Martens ex Asch., Heterozostera et Phyllospadix, Neptune Posidonia de la famille des Posidoniaceae, Cymodocea, Halodule, Syringodium et Thalassodendron de la famille Cymodoceaceae et Enhalus acoroides, Halophila et Thalassia de la famille des Moroducs Hydrocharitaceae, sous-famille Halophiloideae, respectivement, Glaucophyta, Haptophyta, Cryptista, Euglenozoa, Dinozoa s. Dinoflagellates, Raphidophyceae Chloromonadophyceae, Chlorarachniophyta, algues Jaune-vert Xanthophyceae, algues dorées Chrysophyta, Bacillariophyta diatomées, algues brunes Phaeophyta, algues rouges Rhodophyta, algues vertes Chlorophyta, Picobiliphyta, Heterokontophyta, Excavata, Stramenopile, Haptophyta, Cryptophyta, Chlorarachniophyta et Heterokontophyta, Alveolata, Biliphyta et leurs combinaisons en dérivant.
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la première variété de matières fibreuses est le silphium (Silphium perfolatium).
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la seconde pâte est choisie parmi un groupe de matières fibreuses constituées de pâtes naturelles telle que de coton, la pâte de bois mécanique (RMP), la pâte de bois chimiquement mécanique (CRMP ou CMP) ou la pâte de bois chimiquement thermique (CT MP), la pâte de raffineur sous pression (PRMP), la pâte semi-chimique, la pâte chimique à haut rendement, la pâte chimique, la pâte alcaline telle que pâtes sulfatées ou pâtes au bisulfite f, comprenant l'ensemble des fibres susmentionnées sous forme de fibres vierges ou de fibres recyclées telles que les vieux papiers.
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le broyage est effectuée dans un Holländer d'une puissance allant jusqu'à 200 kW, un raffineur Papillon avec une puissance comprise entre 100 et 3600 kW, un broyeur à cône plat, un broyeur à cônes raides d'une puissance comprise entre 90 et 2800 kW ou un broyeur à disques d'une puissance comprise entre 315 et 2500kW.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les matières fibreuses sont dispersées avant le broyage.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le mélange des matières fibreuses broyées est après broyage additionné d'au moins une autre des matières fibreuses de l'une des deux variétés de matières fibreuses.
  9. Utilisation, comme dans le procédé de préparation des fibres d'herbes recyclées selon l'une quelconque des revendications 1 à 8 précédentes, pour la fabrication de papiers, de pâtes à papier et/ou de carton, matériau d'emballage, matériaux de remplissage et/ou matériaux isolants.
EP20758177.8A 2019-08-19 2020-08-18 Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe Active EP4018033B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019122191.9A DE102019122191A1 (de) 2019-08-19 2019-08-19 Verfahren zur Aufbereitung von Grasfasern, insbesondere zur Aufbereitung einer Grasfaser enthaltenden Faserstoffmischung
PCT/EP2020/073090 WO2021032736A1 (fr) 2019-08-19 2020-08-18 Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe

Publications (3)

Publication Number Publication Date
EP4018033A1 EP4018033A1 (fr) 2022-06-29
EP4018033C0 EP4018033C0 (fr) 2023-08-02
EP4018033B1 true EP4018033B1 (fr) 2023-08-02

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EP20758177.8A Active EP4018033B1 (fr) 2019-08-19 2020-08-18 Procédé de préparation de fibres d'herbe, en particulier pour la préparation d'un mélange de pâte à papier contenant des fibres d'herbe

Country Status (5)

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EP (1) EP4018033B1 (fr)
DE (1) DE102019122191A1 (fr)
ES (1) ES2963495T3 (fr)
PL (1) PL4018033T3 (fr)
WO (1) WO2021032736A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5656129A (en) * 1995-05-31 1997-08-12 Masonite Corporation Method of producing fibers from a straw and board products made therefrom
DE202012002588U1 (de) * 2012-03-13 2013-06-17 Uwe D'Agnone Graspapier
EP2982740A1 (fr) * 2014-08-07 2016-02-10 MicrobEnergy GmbH Procede de fabrication de methane
DE202018107331U1 (de) * 2018-12-20 2019-01-30 Creapaper Gmbh Trinkhalm

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ES2963495T3 (es) 2024-03-27
WO2021032736A1 (fr) 2021-02-25
EP4018033C0 (fr) 2023-08-02
DE102019122191A1 (de) 2021-02-25
PL4018033T3 (pl) 2024-02-26
EP4018033A1 (fr) 2022-06-29

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