WO2007073342A1 - Procede de fabrication de papier ou de carton - Google Patents

Procede de fabrication de papier ou de carton Download PDF

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Publication number
WO2007073342A1
WO2007073342A1 PCT/SE2006/050605 SE2006050605W WO2007073342A1 WO 2007073342 A1 WO2007073342 A1 WO 2007073342A1 SE 2006050605 W SE2006050605 W SE 2006050605W WO 2007073342 A1 WO2007073342 A1 WO 2007073342A1
Authority
WO
WIPO (PCT)
Prior art keywords
pulp
steam
paperboard
treatment
treated
Prior art date
Application number
PCT/SE2006/050605
Other languages
English (en)
Inventor
Erik Gillberg
Hasse Hallgren
Lena Lindberg
Kajsa Fougner
Katarina Von Schalien
Mattias Kling
Klas Norborg
Marianne Kiaer
Camilla Holm
Fredrik Turzik
Lars Axrup
Lina Makhoul
Bosse Gustavsson
Magnus Ekberg
Towe Krook
Original Assignee
Stora Enso Ab
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 Stora Enso Ab filed Critical Stora Enso Ab
Publication of WO2007073342A1 publication Critical patent/WO2007073342A1/fr

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • 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
    • D21B1/38—Conserving the finely-divided cellulosic material
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
    • 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
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment

Definitions

  • spore is a collective name for both bacterial and fungal spores. Some species of bacteria have the ability to form spores. For bacteria, the spore is a resting phase, i.e. a form of survival when their living conditions deteriorate. Bacterial spores, also called endospores, display a very strong and powerful survival tendency and are thick-walled spores that are extremely resistant to heat and chemicals. Generally speaking, fungal spores are less resistant to heat and chemicals. However, there are resistant fungal spores but their resistance is much poorer compared to bacterial spores. Primarily, fungi have spores for propagation.
  • the first part of the pulp which consists of virgin fibre, primarily constitutes 10-100% of the total pulp, preferably 10-50% of the total pulp quantity.
  • the first part of the pulp consists, at least in part, of pulped broke, which has been shown to contain high concentrations of micro-organisms .
  • the invention refers to a process for manufacturing paper or paperboard from pulp and where a part of the pulp consisting of virgin fibres is treated with steam.
  • the invention also refers to a paperboard or paper product that has been manufactured by the process according to the invention.
  • the process in question for manufacturing paper or paperboard from a pulp containing fibres, and where at least a first part of the pulp consists of virgin fibres entails that this first part containing virgin fibre is treated with steam so that it reaches a temperature exceeding 90 0 C whereupon the treated first part is subsequently mixed with a second part of the pulp, and the mixed pulp is drained on a wire so that it forms a fibre web.
  • all the pulp i.e., both the first and the second part of the pulp, consists of virgin fibres.
  • the pulp is treated with steam so that the temperature in the pulp is within the interval 100- 130 0 C , preferably 105-130 0 C, 115-13O 0 C, 110-120 0 C or 105- 115 0 C, which has provided very good results with regard to the reduction or elimination of the concentration of micro- organisms .
  • virgin fibre pulp has been treated at lower temperatures with steam in combination with an addition of chemicals such as hydrogen peroxide.
  • treatment with steam is in progress for a period of 0.5 - 10 minutes.
  • the amount of time is based on which type of micro-organism is to be reduced/eliminated, the concentration of micro-organisms and how great a quantity of the pulp is to be treated. Different types of micro-organisms have very different types of heat resistance. If the concentration of micro-organisms in the pulp to be treated is high and/or if there is a great amount of pulp, a longer treatment period is usually required to ensure that all the pulp is heated. Primarily, the treatment will continue for a period of 1-10 minutes, 3-10 minutes or 1- 3 minutes.
  • the part of the pulp treated with steam primarily consists of 10-100% of the total amount of pulp used for the manufacture of the paper or paperboard.
  • the part of the pulp treated with steam consists of 10-50% of the total amount of pulp.
  • it is appropriate to treat all the pulp with steam e.g., when all the pulp that has been produced is small or when the entire amount of pulp contains high concentrations of micro-organisms. However, preferably only a small partial flow of the pulp is treated.
  • the part of the pulp in which the concentration of micro ⁇ organisms is greatest is treated.
  • at least the first part of the pulp consists in part of pulped broke of virgin fibres.
  • the pulp is disintegrated in the first part of the steam heater.
  • the pulp is transported forwards in the steam heater (6), e.g. using paddles.
  • At the end of the steam heater (6) there is a temperature gauge controlling the flow of steam.
  • the processing time in the steam heater (6) can be controlled by varying the rotational speed of the paddles.
  • the pulp is fed to a refiner (7) .
  • the pulp is diluted in the refiner's (7) grinder house with water to achieve a desired dry content of approx. 10% and the pulp can be refined as required.
  • different kinds of refining energies and refining gaps are selected on the refiner (7) .
  • Even the refiner acts as a steam lock. In this way, the first part of the pulp treated with steam is subsequently mixed with the other part of the pulp and led to the paperboard or paper machine (2 ) .
  • the pulp that was treated consisted of dry paperboard broke.
  • the paperboard broke was dissolved to a pulp in a pulper with a dry content of approx. 5%.
  • the pulp was subsequently drained to a dry content of 30-35% before steam treatment was carried out .
  • Table 1 shows 6 different samples where pulp has been treated in accordance with the invention. Samples 1-3 have been treated for one minute at different temperatures and samples 4-6 were treated for three minutes at different temperatures.
  • the spore concentration of the pulp was measured before it was fed into the steam treatment and measured after it has been treated with steam.
  • broke samples Two types of broke samples, one pigment coated paperboard and one uncoated, were produced from pulp that was treated with steam according to the invention. After treatment, hexanal development was measured in the broke samples by spectral analysis using gas chromatography. Both the fresh broke samples and the broke samples that has been stored for a month were tested. The reference samples were produced in the same way as the broke samples, but the pulp that they were produced from was not treated with steam in accordance with the invention.
  • Table 2 shows that the fresh hexanal samples do not exhibit any great difference in the amount of hexanal after the pulp has been treated with steam. Neither was there any difference in the stored sample for the uncoated broke sample. The samples were also tested by a taste panel, which could not distinguish any significant difference between the samples. On the other hand, the stored coated sample exhibited an increase in the amount of hexanal compared with the reference sample. However, the taste panel could not notice any difference.

Landscapes

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

Abstract

La présente invention concerne un processus de fabrication de papier ou de carton à partir d’une pâte contenant des fibres et dans lequel une étape d’élimination ou de réduction de micro-organismes tels que des bactéries et/ou des spores et où ladite première partie passe par une phase de procédé où elle est traitée avec de la vapeur afin d’atteindre une température dépassant 900°C, selon laquelle cette partie traitée est ultérieurement mélangée à la seconde partie de la pâte et cette pâte mélangée s’écoule sur un fil pour former une toile de fibres. Cette invention fait aussi référence à un produit de papier ou de carton fabriqué selon ce procédé.
PCT/SE2006/050605 2005-12-23 2006-12-20 Procede de fabrication de papier ou de carton WO2007073342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0502874-1 2005-12-23
SE0502874A SE0502874L (sv) 2005-12-23 2005-12-23 Process för tillverkning av papper eller kartong

Publications (1)

Publication Number Publication Date
WO2007073342A1 true WO2007073342A1 (fr) 2007-06-28

Family

ID=38188954

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/050605 WO2007073342A1 (fr) 2005-12-23 2006-12-20 Procede de fabrication de papier ou de carton

Country Status (2)

Country Link
SE (1) SE0502874L (fr)
WO (1) WO2007073342A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130180680A1 (en) * 2010-09-22 2013-07-18 Stora Enso Oyj Paper or paperboard product and a process for production of a paper or paperboard product
US10266989B2 (en) 2015-04-03 2019-04-23 Resolute Fp Us Inc. Methods for producing a cellulosic fiber having a high curl index and acquisition and distribution layer containing same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741863A (en) * 1971-08-27 1973-06-26 Rust Eng Co Method of recycling waste cellulosic materials
SE450013B (sv) * 1982-01-27 1987-06-01 Sunds Defibrator Sett for att sterilt emballera mekanisk eller kemimekanisk tremassa
US5900111A (en) * 1996-02-27 1999-05-04 Tetra Laval Holdings & Finance S.A. Process for sanitizing post-consumer paper fibers using heat and hydrogen peroxide
US6391150B1 (en) * 1997-09-26 2002-05-21 Sca Hygiene Products Gmbh Process for treating waste paper to form a spore-free base tissue
EP1279764A2 (fr) * 2001-07-27 2003-01-29 Tokushu Paper Manufacturing Co. Ltd Bande de matière et procédé et dispositif pour son séchage
US20040256071A1 (en) * 2001-09-19 2004-12-23 Markku Huhtamaki Method and apparatus for producing fibre pulp and fuel out of municipal waste

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3741863A (en) * 1971-08-27 1973-06-26 Rust Eng Co Method of recycling waste cellulosic materials
SE450013B (sv) * 1982-01-27 1987-06-01 Sunds Defibrator Sett for att sterilt emballera mekanisk eller kemimekanisk tremassa
US5900111A (en) * 1996-02-27 1999-05-04 Tetra Laval Holdings & Finance S.A. Process for sanitizing post-consumer paper fibers using heat and hydrogen peroxide
US6391150B1 (en) * 1997-09-26 2002-05-21 Sca Hygiene Products Gmbh Process for treating waste paper to form a spore-free base tissue
EP1279764A2 (fr) * 2001-07-27 2003-01-29 Tokushu Paper Manufacturing Co. Ltd Bande de matière et procédé et dispositif pour son séchage
US20040256071A1 (en) * 2001-09-19 2004-12-23 Markku Huhtamaki Method and apparatus for producing fibre pulp and fuel out of municipal waste

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130180680A1 (en) * 2010-09-22 2013-07-18 Stora Enso Oyj Paper or paperboard product and a process for production of a paper or paperboard product
US10266989B2 (en) 2015-04-03 2019-04-23 Resolute Fp Us Inc. Methods for producing a cellulosic fiber having a high curl index and acquisition and distribution layer containing same

Also Published As

Publication number Publication date
SE0502874L (sv) 2007-06-24

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