SE539344C2 - Pulp mixture for production of a paper product with high strength in z-direction - Google Patents

Pulp mixture for production of a paper product with high strength in z-direction Download PDF

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Publication number
SE539344C2
SE539344C2 SE1550239A SE1550239A SE539344C2 SE 539344 C2 SE539344 C2 SE 539344C2 SE 1550239 A SE1550239 A SE 1550239A SE 1550239 A SE1550239 A SE 1550239A SE 539344 C2 SE539344 C2 SE 539344C2
Authority
SE
Sweden
Prior art keywords
pulp
refining
consistency refining
kwh
mixture according
Prior art date
Application number
SE1550239A
Other languages
Swedish (sv)
Other versions
SE1550239A1 (en
SE539344E (en
Inventor
Tubek Lindblom Anna
Original Assignee
Billerudkorsnaes 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 Billerudkorsnaes Ab filed Critical Billerudkorsnaes Ab
Priority to SE1550239A priority Critical patent/SE539344E/en
Priority to PCT/SE2016/050138 priority patent/WO2016140609A1/en
Priority to EP16710843.0A priority patent/EP3265609B1/en
Publication of SE1550239A1 publication Critical patent/SE1550239A1/en
Publication of SE539344C2 publication Critical patent/SE539344C2/en
Publication of SE539344E publication Critical patent/SE539344E/en

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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
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • 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
    • D21C9/001—Modification of pulp properties
    • D21C9/007—Modification of pulp properties by mechanical or physical means
    • 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
    • D21H11/08—Mechanical or thermomechanical pulp
    • 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
    • D21H11/10—Mixtures of chemical and mechanical pulp
    • 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
    • D21H27/30—Multi-ply
    • 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
    • D21D1/30—Disc mills
    • 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
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • 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
    • D21H27/30—Multi-ply
    • D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

23 ABSTRACT A pulp mixture comprising a first pulp and a second pulp is disclosed. The first pulp is a chemicalsoftwood pulp which has been subjected to HC and LC refining. The second pulp may be a CTMP,TMP or a LC refined chemical softwood pulp. By means of the pulp mixture it is possible to produce a paper web with high strength in Z-direction and high bulk.

Description

or paper having a density of less than 700 kg/m3 and a Z-tensile strength of more than 650 kPa (both in case of the first pulp being a bleached pulp and in the case of the first pulp being an unbleached pulp).
According to another embodiment, the second pulp is a chemical softwood pulp refined solely by lowconsistency refining and the first pulp is present in an amount of 8-85 %, preferably 10-60 %, by dryweight of the total dry weight of the first pulp and the second pulp. By means of such a pulp mixtureit has for example been found to be possible to obtain a layer or paper having a density of less than750 kg/m3 and a Z-tensile strength of at least 550 kPa, typically of at least 600 kPa. lt has also beenfound to be possible to obtain a layer or paper of said pulp mixture having a density of less than 780 kg/m3 and a Z-tensile strength of at least 650 kPa at least for a bleached pulp mixture.
The first pulp may suitably be a bleached chemical softwood pulp which has been subjected to highconsistency refining followed by low consistency refining with a total refining energy of the high consistency refining and the low consistency refining of 70-250 kWh/t, preferably 130-220 kWh/t.
The first pulp may alternatively suitably be an unbleached chemical softwood pulp which has been su bjected to high consistency refining followed by low consistency refining with a total refiningenergy of the high consistency refining and the low consistency refining of 150-400 kWh/t, preferably200-360 kWh/t.
Low consistency refining of the high consistency refined chemical softwood pulp to obtain the firstpulp may suitably be performed at a quite moderate refining energy, such as 15-40 kWh/t, preferably15-30 kWh/t.
The first pulp may suitably have a Schopper Rielger (SR) number according to ISO 5267-1:1999 ofabove 15.0, preferably 15.2-18.8, and/or a water retention value (WRV) according to SCAN-C 62:00of above 1.55 g/g, preferably 1.58-1.90 g/g. ln case the first pulp is an unbleached pulp, the WRVmay optionally be equal to or above 1.80 g/g, whereas in the case of the first pulp is a bleached pulp, the WRV may optionally be less than 1.80 g/g.
The pulp mixture may suitably have a Schopper Rielger (SR) number according to SO 5267-1:1999 of14.0-19.0, and/or a water retention value (WRV) according to SCAN-C 62:00 of 1.45-1.85 g/g.

Claims (20)

1. Pulp mixture comprising a first pulp and a second pulp, the first pulp consisting of a chemicalsoftwood pulp which has been subjected to high consistency refining followed by lowconsistency refining, the second pulp consisting of a bulk increasing pulp selected from thegroup consisting of a chemi-thermomechanical pulp (CTMP), a thermomechanical pulp (TMP)and a chemical softwood pulp which has been subjected to low consistency refining withoutpreceding high consistency refining, and wherein: in the case the second pulp is a chemi-thermomechanical pulp or athermomechanical pulp, the first pulp is present in an amount of 50-90 % by dry weight ofthe total dry weight of the first pulp and the second pulp; in the case the second pulp is a chemical softwood pulp which has been subjected toa low consistency refining without preceding high consistency refining, the first pulp ispresent in an amount of 5-90 % by dry weight of the total dry weight of the first pulp and the second pulp.
2. Pulp mixture according to claim 1, wherein the second pulp is a chemi-thermomechanicalpulp (CTMP) and wherein the first pulp is present in an amount of 60-90 % by dry weight ofthe total dry weight of the first pulp and the second pulp, preferably 75-88 % by dry weight of the total dry weight of the first pulp and the second pulp.
3. Pulp mixture according to claim 1, wherein the second pulp is a chemical softwood pulpwhich has been subjected to low consistency refining without preceding high consistencyrefining, and the first pulp is present in an amount of 8-85 % by dry weight of the total dryweight of the first pulp and the second pulp, preferably 10-60 % by dry weight of the total dry weight of the first pulp and the second pulp.
4. Pulp mixture according to any of the preceding claims, wherein the first pulp is a bleachedchemical softwood pulp which has been subjected to high consistency refining followed bylow consistency refining with a total refining energy of the high consistency refining and the low consistency refining of 70-250 kWh/t, preferably 130-220 kWh/t.
5. Pulp mixture according to any of claims 1 to 3, wherein the first pulp is an unbleached chemical softwood pulp which has been subjected to high consistency refining followed by 10. 11. 12. 13. low consistency refining with a total refining energy of the high consistency refining and the low consistency refining of 150-400 kWh/t, preferably 200-360 kWh/t.
6. Pulp mixture according to any of claims 1-4, wherein the first pulp is a bleached chemicalsoftwood pulp which has been subjected to high consistency refining followed by lowconsistency refining, said low consistency refining performed with a refining energy of 15-40 kWh/t.
7. Pulp mixture according to any of the preceding claims, wherein the first pulp has a Schopper-Riegler (SR) number of above 15.0, preferably 15.2-18.
8. , and/or a water retention value (WRV) of above 1.55 g/g, preferably 1.58-1.90 g/g. Pulp mixture according to any of the preceding claims, wherein the pulp mixture has a SR number of 14.0-19.0 and/or a WRV of 1.45-1.85 g/g. Pulp mixture according to any of the preceding claims further comprising at least one additional component, preferably a filler. Method of producing a pulp mixture according to any of the preceding claims, the methodcomprising subjecting a chemical softwood pulp to a high consistency refining step and asu bsequent low consistency refining step thereby obtaining said first pulp, mixing said first pulp with at least said second pulp such as to achieve said pulp mixture. Method according to claim 10, wherein the chemical softwood pulp is a bleached chemicalsoftwood pulp and wherein the total refining energy used during the high consistencyrefining and the low consistency refining thereof so as to provide said first pulp is 70-250 kWh/t, preferably 130-220 kWh/t. Method according to claim 10, wherein the chemical softwood pulp is an unbleachedchemical softwood pulp and wherein the total refining energy used during the highconsistency refining and the low consistency refining thereof so as to provide said first pulp is 150-400 kWh/t, preferably 200-360 kWh/t. Method according to any of claims 10 to 12, wherein the refining energy during the lowconsistency refining of the chemical softwood pulp subjected to high consistency refining followed by low consistency refining is 15-40 kWh/t. 14. 15. 16. 17. 18. 19. 20. Method according to any of claims 10 to 12, wherein the second pulp is provided bysu bjecting a chemical softwood pulp to a low consistency refining step, without anypreceding high consistency refining step, said low consistency refining step performed at a refining energy of 20-60 kWh/t, preferably 25-55 kWh/t. Paper product obtained by the pulp mixture according to any of claims 1 to 9, having a density of less than 750 kg/m3 and a Z-tensile strength of at least 550 kPa. Paperboard comprising a layer formed from the pulp mixture according to any of claims 1 to 9. Paperboard according to claim 16, comprising a plurality of layers and wherein the layermade of the pulp mixture according to any of claims 1 to 9 constitutes a middle layer of said paperboard. Method for producing a multi-layered board having a middle layer, wherein the middle layer is formed from a pulp mixture according to any of the claims 1 to
9. Method for producing a multi-layered board having a middle layer, the method comprisingproducing a pulp mixture in accordance with the method of any of claim 10 to 14 and forming the middle layer from said pulp mixture. Fine paper obtained by the pulp mixture according to any of claims 1 to 9.
SE1550239A 2015-03-02 2015-03-02 Pulp mixture for production of a paper product with high strength in z-direction SE539344E (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE1550239A SE539344E (en) 2015-03-02 2015-03-02 Pulp mixture for production of a paper product with high strength in z-direction
PCT/SE2016/050138 WO2016140609A1 (en) 2015-03-02 2016-02-25 Pulp mixture for production of a paperboard product with high strength in z-direction
EP16710843.0A EP3265609B1 (en) 2015-03-02 2016-02-25 Pulp mixture for production of a paperboard product with high strength in z-direction

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1550239A SE539344E (en) 2015-03-02 2015-03-02 Pulp mixture for production of a paper product with high strength in z-direction

Publications (3)

Publication Number Publication Date
SE1550239A1 SE1550239A1 (en) 2016-09-03
SE539344C2 true SE539344C2 (en) 2017-07-18
SE539344E SE539344E (en) 2020-02-11

Family

ID=55586376

Family Applications (1)

Application Number Title Priority Date Filing Date
SE1550239A SE539344E (en) 2015-03-02 2015-03-02 Pulp mixture for production of a paper product with high strength in z-direction

Country Status (3)

Country Link
EP (1) EP3265609B1 (en)
SE (1) SE539344E (en)
WO (1) WO2016140609A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210268783A1 (en) * 2018-06-27 2021-09-02 Stora Enso Oyj A light weight linerboard for corrugated board

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3418446A1 (en) * 2017-06-21 2018-12-26 BillerudKorsnäs AB Pulp mixture
EP3502348B1 (en) * 2017-12-21 2020-06-24 BillerudKorsnäs AB Fibre fractionation
SG11202009492UA (en) * 2018-03-27 2020-10-29 Mybiomass Sdn Bhd Unbleached pulp product and the process of producing the same
PL3942107T3 (en) * 2019-03-20 2023-11-06 Billerud Aktiebolag (Publ) Production method
PL4105381T3 (en) * 2021-06-18 2023-10-09 Billerud Aktiebolag (Publ) Product of paperboard having improved printing properties

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9402101L (en) 1994-06-15 1995-12-16 Moelnlycke Ab Light dewatering, bulky, chemical-mechanical pulp with low tip and fine material content
SE510506C2 (en) 1997-07-09 1999-05-31 Assidomaen Ab Kraft paper and process for making this and valve bag
RU2367739C2 (en) 2004-10-15 2009-09-20 Стора Энсо Аб Method of paper or cardboard production and paper or cardboard produced by method
US20070215301A1 (en) 2006-03-17 2007-09-20 Weyerhaeuser Co. Method for making a low density multi-ply paperboard with high internal bond strength
EP1936032A1 (en) 2006-12-18 2008-06-25 Akzo Nobel N.V. Method of producing a paper product
SE535014C2 (en) 2009-12-03 2012-03-13 Stora Enso Oyj A paper or paperboard product and a process for manufacturing a paper or paperboard product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210268783A1 (en) * 2018-06-27 2021-09-02 Stora Enso Oyj A light weight linerboard for corrugated board
US11926128B2 (en) * 2018-06-27 2024-03-12 Stora Enso Oyj Light weight linerboard for corrugated board

Also Published As

Publication number Publication date
WO2016140609A1 (en) 2016-09-09
EP3265609A1 (en) 2018-01-10
SE1550239A1 (en) 2016-09-03
SE539344E (en) 2020-02-11
EP3265609B1 (en) 2020-09-23

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RPOP Patent has been republished in amended form after opposition