EP0209538B1 - Verfahren zur herstellung von tonerde und anderen füllmaterialien zum verstärken von papier - Google Patents

Verfahren zur herstellung von tonerde und anderen füllmaterialien zum verstärken von papier Download PDF

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Publication number
EP0209538B1
EP0209538B1 EP19860900327 EP86900327A EP0209538B1 EP 0209538 B1 EP0209538 B1 EP 0209538B1 EP 19860900327 EP19860900327 EP 19860900327 EP 86900327 A EP86900327 A EP 86900327A EP 0209538 B1 EP0209538 B1 EP 0209538B1
Authority
EP
European Patent Office
Prior art keywords
filler
fines
paper
pulp
process according
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.)
Expired - Lifetime
Application number
EP19860900327
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English (en)
French (fr)
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EP0209538A1 (de
Inventor
Gunnar Gavelin
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.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo AB
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Filing date
Publication date
Application filed by Mo och Domsjo AB filed Critical Mo och Domsjo AB
Publication of EP0209538A1 publication Critical patent/EP0209538A1/de
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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
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D21H17/375—Poly(meth)acrylamide
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/76—Processes or apparatus for adding material to the pulp or to the paper characterised by choice of auxiliary compounds which are added separately from at least one other compound, e.g. to improve the incorporation of the latter or to obtain an enhanced combined effect
    • D21H23/765—Addition of all compounds to the pulp

Definitions

  • This invention can be used to improve the retention of fillers during papermaking, to prevent a harmful agglomeration of filler particles in paper and to obtain a uniform distribution of filler in paper.
  • the invention also mitigates the harmful effect of filler on the strength of paper as well as the harmful effect of retention aids on paper formation. Aggregates of filler particles and fines from beaten or refined pulps contribute to a high opacity in the paper.
  • a retention aid is usually added to the pulp suspension in order to improve the retention, which would otherwise become so low that the content of filler in the circulating white water would become too high for safe operation of the machine and would also result in high losses to the sewer.
  • the purpose of this invention is to achieve an improved filler retention without generation of dense filler agglomerates.
  • a solution to this problem has been found to be the process as claimed in Claim 1.
  • Specific embodiments of this process are the subject of Claims 2 to 5.
  • An important feature of the process is to flocculate the filler particles when mixed with a fines fraction of wood fibrils, whereby the particles are kept apart by these fibrils, which latter are bound into voluminous flocs, presumably by polymer bridging, the flocs being easily filtered off during drainage on the paper machine wire and retaining their position in the fibre network in spite of the flow of water through it during dewatering and pressing on the paper machine.
  • the fines have an ability to scatter light and thereby improve the opacity of the paper provided only that a distance of at least one half wave length of the light can be maintained between the fibrils in the paper, something that will be promoted by coflocculation of fines and fillers.
  • the fibrils should, therefore, preferably derive from mechanical or chemimechanical pulp, in which the fibre wall, from which the fibrils have been peeled off, still retains the stiffness of wood.
  • the pulp should preferably be peroxide bleached, since this invention will be used mainly in combination with manufacture of printing paper requiring a high brightness.
  • the coflocculation process itself is just as efficient with fines of chemical pulp, and on a paper machine it is recommended to use the rich white water from the first part of the drainage table for dilution of the fines to be used in the process. This will greatly improve retention and lower the white water consistency.
  • Mechanical pulp for use in high grade printing paper can be made with a fines content above 50%, but one cannot go too far in this respect since long fibres are also needed for strength and since retention will be a problem, when such pulp is added to the furnish.
  • the above type of pulp is used according to this invention, it will cause no drainage or retention troubles and can be as finely refined as is possible.
  • part of the main furnish can be subjected to a separate refining process producing a suitable fine grade pulp.
  • the quantity required amounts to 20% on the weight of the filler added.
  • the refining should take place at a consistency of 20-50% in order to produce fibrils and lamellas rather than broken fibres.
  • the fine grade pulp which conveniently can be a commercial mechanical pulp of very lowfreeness, for example 50 ml C.S.F. (Canadian Standard Freeness), is diluted in an agitated tank preferably with white water from the first part of the drainage table to a consistency of conveniently 57-10 g/I.
  • the pulp is then mixed with a filler suspension at a rate giving for example 20% fines on the weight of the filler, which is conveniently achieved by continuous pumping of the two suspensions into a mixing chamber.
  • a retention aid is introduced for coflocculation of fines and filler.
  • the floc suspension is then pumped into the furnish for example ahead of the fan pump feeding the paper machine.
  • Figure 1 shows the filler distribution from top side to wire side in two sheets made from equal parts of filler and fines flocculated by a polymer. The picture demonstrates that the filler particles in these sheets were so firmly bound to the fines that they retained their positions in the sheet during drainage, pressing and drying.
  • Figure 2 shows the results of retention studies on a laboratory sheet mould, in which sheets have been made either after addition of filler and retention aid to the furnish (P+P) or after addition of preflocculated fines-filler aggregates to the sheet machine.
  • P+P filler and retention aid
  • P+F preflocculated fines-filler aggregates

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Claims (7)

1. Verfahren zur Herstellung von Papier, das Ton oder andere Mineralfüllstoffe enthält, dadurch gekennzeichnet, daß man eine Fasersuspension, die aus einer Siebfeinfraktion von Holzfibrillen besteht, mit dem Füllstoff mischt, dann die Siebfeinfraktion und den Füllstoff durch Zugabe eines polymeren Retentionshilfsmittels zu der Mischung miteinander ausflockt und danach einen Stoffeintrag, der zu einer Papiermaschine befördert wird, kontinuierlich mit den resultiernden Siebfein-Füllstoffflocken beschickt.
2. Verfahren nach Anspruch 1, worin die Siebfeinfraktion hauptsächlich aus Fibrillen aus zerkleinerten Faserwänden von mechanischem Halbstoff besteht.
3. Verfahren nach Anspruch 1, worin die Siebfeinfraktion von einem chemi-mechanischen Halbstoff abstammt.
4. Verfahren nach Anspruch 1, worin die Siebfeinfraktion von einem chemischen Halbstoff abstammt.
5. Verfahren nach irgend einem der Ansprüche 1 bis 4, worin das Retentionshilfsmittel ein kationsaktives Polyacrylamid ist.
6. Verfahren nach irgend einem der Ansprüche 1 bis 5, worin die Fasersuspension mit Siebwasser von einer Papiermaschine verdünnt wird.
7. Verfahren nach Anspruch 6, worin das Siebwasser von dem ersteren Teil des Entwässerungstisches einer Papiermaschine genommen wird.
EP19860900327 1985-01-15 1985-12-10 Verfahren zur herstellung von tonerde und anderen füllmaterialien zum verstärken von papier Expired - Lifetime EP0209538B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8500162A SE455318B (sv) 1985-01-15 1985-01-15 Sett for framstellning av papper innehallande lera eller andra fyllmedel
SE8500162 1985-01-15

Publications (2)

Publication Number Publication Date
EP0209538A1 EP0209538A1 (de) 1987-01-28
EP0209538B1 true EP0209538B1 (de) 1990-05-23

Family

ID=20358763

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860900327 Expired - Lifetime EP0209538B1 (de) 1985-01-15 1985-12-10 Verfahren zur herstellung von tonerde und anderen füllmaterialien zum verstärken von papier

Country Status (6)

Country Link
EP (1) EP0209538B1 (de)
DE (2) DE3590715T1 (de)
FI (1) FI80742C (de)
GB (1) GB2181464B (de)
SE (1) SE455318B (de)
WO (1) WO1986004370A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8621680D0 (en) * 1986-09-09 1986-10-15 Du Pont Filler compositions
SE455795B (sv) * 1986-12-03 1988-08-08 Mo Och Domsjoe Ab Forfarande och anordning for framstellning av fyllmedelshaltigt papper
WO1991001409A1 (en) * 1989-07-24 1991-02-07 The Board Of Regents Of The University Of Washington Cell wall loading of never-dried pulp fibers
FI106140B (fi) * 1997-11-21 2000-11-30 Metsae Serla Oyj Paperinvalmistuksessa käytettävä täyteaine ja menetelmä sen valmistamiseksi
US6033524A (en) * 1997-11-24 2000-03-07 Nalco Chemical Company Selective retention of filling components and improved control of sheet properties by enhancing additive pretreatment
WO2017054198A1 (en) 2015-09-30 2017-04-06 Ecolab Usa Inc. Compositions and methods for treating filler in papermaking

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3141815A (en) * 1960-07-27 1964-07-21 Nalco Chemical Co Process of improving inorganic filler retention in paper by addition of ethylene oxide homopolymer
US3865686A (en) * 1962-06-27 1975-02-11 Nalco Chemical Co Method of improving the retention of filler and fiber fines in papermaking processes by using an acrylamide terpolymer
US3997648A (en) * 1972-01-03 1976-12-14 Gulf Research & Development Company Fibril formation process
IE47019B1 (en) * 1977-07-12 1983-11-30 Blue Circle Ind Ltd Producing dispersions of polymeric material and preflocculated fillers for use in papermaking
GR65316B (en) * 1978-06-20 1980-08-02 Arjomari Prioux Method for the preparation of fibrous leaf

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Journal of Pol Sci: Pol Lett Ed, Vol 2o, 615-62o (1982), Alince, B, et al "Cationic Latex in Fiber-Clay Paper Composites". *
Pulp Technol & Treatment for Paper (1978), Miller Freeman Publns p 16o, 177-179, 257-26o, 277-28o, 664, 676-677. *
Svensk papperstidning 1983: 1o, p. 4o-41, 44, 47-48, 51, Fineman I. *

Also Published As

Publication number Publication date
SE8500162D0 (sv) 1985-01-15
FI863682A (fi) 1986-09-11
SE8500162L (sv) 1986-07-16
SE455318B (sv) 1988-07-04
GB2181464B (en) 1988-02-03
GB2181464A (en) 1987-04-23
WO1986004370A1 (en) 1986-07-31
DE3590715C2 (de) 1990-10-18
DE3590715T1 (de) 1987-01-29
FI80742B (fi) 1990-03-30
FI863682A0 (fi) 1986-09-11
GB8622077D0 (en) 1986-10-22
FI80742C (fi) 1990-07-10
EP0209538A1 (de) 1987-01-28

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