EP3748077B1 - Pulpe d'écorce d'eucalyptus globulus pour produits textiles - Google Patents

Pulpe d'écorce d'eucalyptus globulus pour produits textiles Download PDF

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Publication number
EP3748077B1
EP3748077B1 EP19020674.8A EP19020674A EP3748077B1 EP 3748077 B1 EP3748077 B1 EP 3748077B1 EP 19020674 A EP19020674 A EP 19020674A EP 3748077 B1 EP3748077 B1 EP 3748077B1
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EP
European Patent Office
Prior art keywords
pulp
paper
bark
eucalyptus globulus
tissue
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.)
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Application number
EP19020674.8A
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German (de)
English (en)
Other versions
EP3748077A1 (fr
EP3748077C0 (fr
Inventor
Paula Cristina DE OLIVEIRA RODRIGUES PINTO
Ana Margarida Martins Salgueiro Carta
Margarida FERREIRA BASTOS
Pedro Miguel Sena Da Costa Branco
Ricardo Jorge De Oliveira
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.)
Raiz - Instituto De Investigação Da Floresta E Papel
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Raiz - Instituto De Investigação Da Floresta E Papel
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Priority to PCT/EP2020/065123 priority Critical patent/WO2020245071A1/fr
Publication of EP3748077A1 publication Critical patent/EP3748077A1/fr
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Publication of EP3748077B1 publication Critical patent/EP3748077B1/fr
Publication of EP3748077C0 publication Critical patent/EP3748077C0/fr
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Classifications

    • 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
    • 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
    • D21B1/02—Pretreatment of the raw materials by chemical or physical means
    • D21B1/021—Pretreatment of the raw materials by chemical or physical means by chemical means
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
    • 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
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/20—Pulping cellulose-containing materials with organic solvents or in solvent environment
    • 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
    • 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
    • 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 tissue paper sheets incorporating 20%-30% (w/w) of an Eucalyptus globulus bark pulp as defined in the present claim 1, and their use for the production of household and sanitary products.
  • the industrial process of pulp production can generally be described as involving the processes of preparation of the raw material and cooking, the later which can be chemical or mechanical.
  • Wood is the main source of raw material for cellulose pulp production.
  • One of the steps in the preparation of the raw material is the stripping of the wood logs to remove the bark.
  • Industrial pulp and paper producers remove bark from the raw material because it is low in fiber, has a high extractable content, is dark and usually incorporates large amounts of debris such as sand.
  • the resulting bark is used for energy production at biomass boilers usually present at pulp and paper mills.
  • the pulp produced through wood cooking is then converted into different products such as printing and writing papers, packaging boards and tissue papers.
  • the document CN102011334B describes a cooking method using Eucalyptus bark.
  • the Eucalyptus bark is subjected to grinding, to an alkaline treatment and milling of the resulting pulp.
  • the pulp is also described as being used for the preparation of corrugated paper.
  • the method described is intended to be an alternative for reducing the environmental impact of the pulp and paper production process. No paper properties of the corrugated paper produced are detailed.
  • the document CN109082929A discloses a method of using Eucalyptus bark for the preparation of pulp for paper production, characterized by a crushing step of the bark, followed by immersing it in an alkaline liquid for 30-48 hours, and mixing the resulting pulp with water and carrying out a final grinding.
  • the method is described as simple, inexpensive and environmentally friendly. Additionally it is described in said document that the pulp produced is suitable for the production of corrugated paper. No paper properties of the corrugated paper produced are detailed.
  • JP2011047083A describes a method for the production of liberian fibers from the bark of a tree plant, which involves a saccharification treatment with a saccharifying enzyme followed by a solid - liquid separation.
  • JP2010136646A relates to a a method for the production of saccharides, more energy efficient, by controlling the water content and the drying temperature, through bark saccharification.
  • CN102011334A discloses a method for producing corrugated paper by using eucalyptus bark, particularly from Eucalyptus Urophylla's.
  • CN109082929A describes a method of using eucalyptus barks for paper production, particularly corrugated paper, advanced corrugated paper and blank sheet of paper.
  • US6296736B1 relates to refers to a method of producing sanitary products from recycled newspapers, by washing the newspapers pulp to reduce the proportion of fines and by treating the it with a surfactant system as it is introduced into the papermachine.
  • JP2011193981A discloses a sanitary paper with excellent touch and that generates little paper dust, consisting of long fibers of size 24 mesh.
  • Tissue papers are those used for hygienic and sanitary purposes, both at home and in public places.
  • a tissue paper product such as toilet paper, napkins, kitchen rolls or tissues, is characterized by key properties such as strength, absorption, softness and even visual appearance.
  • EP0478045A1 describes a soft tissue paper having a suitable tensile strength, obtained by incorporating into its constitution cellulose pulps obtained by different chemical and mechanical methods, and which have different types of wood as their raw material. Adopting this solution to improve the mentioned paper characteristics will lead to changes on an existing industrial production process of paper products. Additional costs are easily associated with these significant changes to an industrial process.
  • tissue paper products Another possibility commonly adopted for tissue paper products to improve their characteristics would be the use of chemical additives, as explained in EP0347154A2 , which describes a product incorporating starch and polysiloxane to achieve an acceptable balance between softness and tensile strength of tissue paper products.
  • EP0981668A1 describes a tissue paper product wherein at least one inner surface of the paper contains a resistance enhancing polymeric agent.
  • US5316623A provides a method for obtaining a tissue paper product having good absorption capacity and strength, which consists on the use of a combination of alkaline or neutral resins, water soluble anionic polymers and tertiary amines.
  • tissue paper products with a wide range of improved paper properties which are valued by the consumers, such as strength, absorption and even visual appearance, which can be associated with the ideas of sustainability and environmental concern, produced through alternative raw materials, which do not involve complex sources and mixtures of materials, which can be used in existing industrial processes and without significant changes, allowing reducing the waste streams of industrial processes, fulfilling possible deficiencies in the amount of raw material available for pulp and paper production, and which make possible to reduce, in number and quantity, the use of chemical additives for enhancing the characteristics of tissue papers.
  • Such a problem is solved by the invention described herein.
  • the present invention is defined in the current claim 1.
  • This invention describes tissue products with a globally improved consumer-friendly pulp properties, such as strength, absorption and even visual appearance associated with sustainability ideas and environmental concerns comprising 20% - 30% (w/w) of a Eucalyptus globulus bark fibers pulp. Additionally, they are advantageously produced through alternative raw materials, not involving complex sources and mixtures of raw materials, in existing industrial processes and without significant modifications, with a reduction of the waste streams associated with industrial processes, filling possible deficiencies in the amount of raw material available for pulp and paper production, and making it possible to reduce, in number and quantity, the use of chemical additives for enhancing the characteristics of tissue papers.
  • This disclosure describes a cellulose pulp for the production of tissue products comprising Eucalyptus globulus bark fibers.
  • the Eucalyptus globulus bark pulp is comprised of fibers having a length of not less than 0.8 mm, a width of not less than 20 ⁇ m and a coarseness value of not less than 8 mg/100m.
  • the Eucalyptus globulus bark pulp presents a viscosity of not less than 1100 mL/g and a carboxyl content of not less than 9%.
  • the Eucalyptus globulus bark pulp is produced by a method involving the steps of bark chip selection, bark pre-extraction with an ethanol:water mixture, and cooking of the chips with NaOH and Na 2 S for a time of not less than 200 minutes and at a temperature from 17 to 170 °C.
  • the disclosed invention therefore includes sheets of tissue paper incorporating the Eucalyptus globulus bark pulp, and short and long cellulose fiber pulps.
  • the sheets have improved paper properties compared to tissue sheets that incorporate only Eucalyptus globulus wood pulp in their composition.
  • the described Eucalyptus globulus bark pulp can be used in different forms, such as in the form of dried pulp bales and in the form of a slush, the later feed to the industrial process through pipeline systems.
  • the tissue paper sheets have bulk values from 2 to 7 cm 3 /g and a tensile index from 10 to 30 kN.m /kg. An absorption capacity greater than 8 gH 2 O/g paper and softness values of not less than 70 HF were found.
  • tissue papers sheets incorporating the Eucalyptus globulus bark pulp as defined in claim 1, for the production of household and sanitary products, such as toilet paper, napkins, kitchen paper rolls and tissues.
  • Eucalyptus globulus bark cooking was performed in a time and temperature controlled rotary digester.
  • Extractable compounds are hydrophobic (lipophilic) components present in wood and extracted by organic solvents.
  • the extractable compounds content was determined using ethanol/toluene in quantities enough for samples analysis preparation, as it requires a pulp pre-extraction.
  • the extraction was carried out during approximately 4 hours (24 extraction cycles) of 2 g (dry basis) of pulp in a 100 mL capacity Soxhlet extraction apparatus, using 250 mL of a 1:2 (v/v) ethanol/toluene solution.
  • the insoluble residue was filtered and washed with hot absolute ethanol, for removing any remaining toluene, and dried at room temperature, contrary to what is indicated at the standard TAPPI T 204 om-88, since washing with water, as described, could lead to the loss of pentosans and other polysaccharides of low molecular weight.
  • the obtained extract was dried at a rotary evaporator equipment and the extractable content was determined gravimetrically.
  • Pentosans content was determined according to the Tappi Test Method T 223 cm-10. This method is based on the action of hydrochloric acid on the pulp hemicelluloses, hydrolyzing them and, consequently, converting the xylose and other pentoses to furfural, which is collected with the distillate and, reacting with orcinol, forms a colored complex making therefore possible the content quantification by spectrophotometry.
  • the content of carboxyl groups was determined according to the TAPPI T 237 om-93 standard method. About 2.5 ⁇ 0.1 g of disintegrated pulp was first weighed and 250 mL of a diluted hydrochloric acid solution (approximately 0.1 M) was added during 12 hours, ensuring that all existing carboxylic groups are in their protonated form. Subsequently, the pulp was filtered and washed with distilled water until the pH of the filtrate equaled the pH of the distilled water.
  • the viscosity was determined according to the SCAN-test standards SCAN-CM 15:88, which consists on the determination of the viscosity of cellulose pulps by solubilization in a dilute copper-ethylenediamine (CED) solution.
  • SCAN-CM 15:88 which consists on the determination of the viscosity of cellulose pulps by solubilization in a dilute copper-ethylenediamine (CED) solution.
  • the pulp sample was reduced to small fragments in the amount indicated at the table provided by the method (Table 7, Annex C.1.) - 150 mg of pulp were weighed. Each sample was placed into a glass vial along with 25 mL of distilled water and some copper wires. The vials were then placed on a shaker for as long as necessary to ensure that the pulp was completely disintegrated. The procedure continued with adding 25 mL of 1 M CED solution, expelling all existing air and stirring until the sample is completely dissolved. Finally, the temperature of the viscometer bath and the sample's were adjusted to 25.0 ⁇ 0.1 °C and, with the aid of a syringe, a portion of the solution was aspirated and allowed to flow unobstructed. The time it takes to travel the distance between the two viscometer marks was measured to within ⁇ 0.2 s. At least 5 readings were taken for each sample.
  • Biometric and chemical measurements and comparisons were carried out for a pulp produced with Eucalyptus globulus wood (SF), characterized by containing short fibers, and for a pulp containing long cellulose fibers (LF), in addition to for the pulp produced with Eucalyptus globulus bark (BP) by the process described above.
  • SF Eucalyptus globulus wood
  • LF pulp containing long cellulose fibers
  • BP Eucalyptus globulus bark
  • Tissue paper sheets with a weight of 20 g/m 2 were prepared following an adaptation of the standard method ISO 5269-1:2005. Additionally, 60 g/m 2 tissue paper sheets were prepared according to the same ISO.
  • Reference formulations consist on formulations used for the production of tissue paper sheets.
  • the other formulations were based on the replacement of short fibers content by bark pulp ( BP1 and BP2 ).
  • the softness was analyzed on an Emtec TSA - Tissue Softness Analyzer. This device combines data from the three parameters that have the greatest influence on the human feel to the touch: fibers softness, smoothness, and sheet stiffness.
  • the calculation method used by the device is an algorithm that calculates the hand feel (HF).
  • the water absorption of the tissue papers was determined according to the standard ISO 12625-8:2010, by the immersion absorption method. Approximately 2 g of paper was placed in a basket of certain dimensions, contrary to what is mentioned at the standard, which indicates the use of 5 g of paper.
  • the Scott Test is related to the internal fibers bonding strength of the paper when subjected to delamination. It allows the determination of the energy (or force) required to delaminate a sheet of paper in the z-direction.
  • TAPPI T 569 standard the paper sheet is delaminated under the action of a pendulum of controlled mass and velocity.
  • the internal strength of the fibers is affected by the paper sheets formation (bonding between layers) and also by the process of pulp refining.
  • Gurley's air resistance is a structural property that quantifies the time required for a certain volume of air (100 mL) to pass through a given area of paper under constant pressure, ISO 5636-5:2013 standard. It is an indirect measure of the porosity of the fibrous matrix.
  • BP revealed a considerably higher value than the SF 's (homologous), meaning the degree of cellulose polymerization was preserved.
  • the pentosans content (measured by the xylan content, the majority of hemicelluloses in short fiber pulps) is within the typical range and considered as favorable.
  • the tensile index increased with the incorporation of bark pulp.
  • the incorporation of BP fibers resulted in increased capillarity, especially when compared to REF 1.
  • the opacity of the fibrous structures also increases with the incorporation of BP.

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Claims (4)

  1. Feuilles de papier tissu comprenant 20 % à 30 % (p/p) de pâte de fibres d'écorce d'Eucalyptus globulus, ayant un volume spécifique compris entre 2 et 7 cm3/g et un indice de traction compris entre 10 et 30 kN.m/kg.
  2. Les feuilles de papier tissu selon la revendication 1, ayant un indice de déchirure supérieur à 3 mN.m2/g, un indice d'éclatement d'au moins 1 kPa.m2/g, une capillarité supérieure à 60 mm/10 min et une opacité supérieure à 75 %.
  3. Les feuilles de papier tissu selon l'une quelconque des revendications 1 à 2, ayant un indice de déchirure supérieur à 8 mN.m2/g, une capillarité supérieure à 70 mm/10 min et une opacité supérieure à 90 %.
  4. Utilisation des feuilles de papier tissu décrites dans l'une quelconque des revendications 1 à 3 pour la production de produits ménagers et sanitaires.
EP19020674.8A 2019-06-03 2019-12-05 Pulpe d'écorce d'eucalyptus globulus pour produits textiles Active EP3748077B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2020/065123 WO2020245071A1 (fr) 2019-06-03 2020-06-01 Pâte d'écorce d'eucalyptus globulus pour des produits en papier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT115562A PT115562B (pt) 2019-06-03 2019-06-03 Pasta celulósica de casca de eucalyptus globulus, e seu processo de produção, para produtos de papel tissue

Publications (3)

Publication Number Publication Date
EP3748077A1 EP3748077A1 (fr) 2020-12-09
EP3748077B1 true EP3748077B1 (fr) 2025-03-12
EP3748077C0 EP3748077C0 (fr) 2025-03-12

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PT (1) PT115562B (fr)
WO (1) WO2020245071A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4261343A1 (fr) 2022-04-13 2023-10-18 SCA Forest Products AB Conversion de résidus de biomasse en bio-huile

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE132556T1 (de) 1988-06-14 1996-01-15 Procter & Gamble Sanftes tissuepapier
SE500524C2 (sv) 1990-09-12 1994-07-11 Eka Nobel Ab Mjukt papper med hög styrka samt förfarande för dess framställning
US5316623A (en) 1991-12-09 1994-05-31 Hercules Incorporated Absorbance and permanent wet-strength in tissue and toweling paper
US6296736B1 (en) * 1997-10-30 2001-10-02 Kimberly-Clark Worldwide, Inc. Process for modifying pulp from recycled newspapers
US5851352A (en) 1997-05-12 1998-12-22 The Procter & Gamble Company Soft multi-ply tissue paper having a surface deposited strengthening agent
US6387210B1 (en) * 1998-09-30 2002-05-14 Kimberly-Clark Worldwide, Inc. Method of making sanitary paper product from coarse fibers
JP2010136646A (ja) * 2008-12-10 2010-06-24 Oji Paper Co Ltd 樹皮原料から糖類を製造する方法
BRPI1012286A2 (pt) * 2009-05-28 2015-09-22 Lignol Innovations Ltd derivados de lignina nativa de matérias-primas de fibras de plantas anuais
JP5267387B2 (ja) * 2009-08-28 2013-08-21 王子ホールディングス株式会社 靭皮繊維の製造方法及び靭皮繊維
JP5666155B2 (ja) * 2010-03-18 2015-02-12 日本製紙株式会社 衛生用紙
CN102011334B (zh) 2010-11-11 2013-04-10 梁锋 一种利用桉树皮制浆及造纸的方法
US9267240B2 (en) * 2011-07-28 2016-02-23 Georgia-Pacific Products LP High softness, high durability bath tissue incorporating high lignin eucalyptus fiber
CN109082929A (zh) 2018-09-06 2018-12-25 梁理鼎 一种利用桉树皮生产造纸纸浆的方法以及纸浆

Also Published As

Publication number Publication date
EP3748077A1 (fr) 2020-12-09
PT115562A (pt) 2020-12-03
PT115562B (pt) 2021-12-24
WO2020245071A1 (fr) 2020-12-10
EP3748077C0 (fr) 2025-03-12

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