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EP0282415B1 - Verfahren zur Papierherstellung - Google Patents

Verfahren zur Papierherstellung Download PDF

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Publication number
EP0282415B1
EP0282415B1 EP88400568A EP88400568A EP0282415B1 EP 0282415 B1 EP0282415 B1 EP 0282415B1 EP 88400568 A EP88400568 A EP 88400568A EP 88400568 A EP88400568 A EP 88400568A EP 0282415 B1 EP0282415 B1 EP 0282415B1
Authority
EP
European Patent Office
Prior art keywords
starch
cationic
anionic
fact
starches
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
EP88400568A
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English (en)
French (fr)
Other versions
EP0282415A1 (de
EP0282415B2 (de
Inventor
Serge Gosset
Pierre Lefer
Guy Fleche
Jean Schneider
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.)
Roquette Freres SA
Original Assignee
Roquette Freres SA
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Filing date
Publication date
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Application filed by Roquette Freres SA filed Critical Roquette Freres SA
Priority to AT88400568T priority Critical patent/ATE63343T1/de
Publication of EP0282415A1 publication Critical patent/EP0282415A1/de
Publication of EP0282415B1 publication Critical patent/EP0282415B1/de
Application granted granted Critical
Publication of EP0282415B2 publication Critical patent/EP0282415B2/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
    • 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
    • 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
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch

Definitions

  • starches characterized by an increasingly high cationicity, but obviously limited by the maximum cationicity that can achieve conventional methods of obtaining cationic starches. And, in any case, whatever the degree of cationicity, the closing of the circuits and the degradation of the quality of the fibers results in an inevitable drop in the resistance of the papers.
  • patent EP 60,291 describes the preparation of a gel based on cationic starch and carboxy-methylcellulose or on a polymer of uronic acid, this gel being partially dehydrated by the action of a colloidal solution of polysilicic acid or an oxypolyaluminum compound.
  • Dual techniques lead to an improvement in retention, thus making it possible to manufacture paper with a higher content of fillers. They allow a substantial saving of cellulose, but are not applicable in all cases. In addition, the amount of starch attached to the cellulose at the time of the formation of the sheet remains still limited, the physical characteristics of the paper thus obtained are not always improved sufficiently.
  • the object of the invention is therefore, above all, to provide a process for the production of paper which responds better than those which already exist to the various wishes of the practice.
  • this incumbent Company has found, after in-depth research, that it becomes possible, in particular in conditions deemed to be difficult, to increase significantly, that is to say by at least 30%, or even 50 % or even more than 100%, the limit threshold for fixing the starch in the fibrous composition when introducing into the mass of fibers, in particular partially wet, separately from one another, a cationic starch and an anionic starch other than starch phosphate.
  • limit threshold for fixing starch in the fibrous composition denotes the amount of starch fixed per unit weight of dry fibrous composition, the latter comprising all of the insoluble constituents used to form the sheet of paper.
  • the process for manufacturing paper according to the invention is characterized in that one introduces into the fibrous composition constituting the raw material, at two or more points, in particular in the wet part, separately one on the other, one (or more) cationic starch (s) and one (or more) anionic starch (s) other than starch phosphate.
  • the anionic starch other than a starch phosphate is chosen from the group comprising starch phosphonates, carboxyalkyl starches and, preferably, starch sulphates, starches sulfoalkylated and sulfocarboxyalkylated.
  • the expression “anionic starch” designates all products of this type with the exception of starch phosphates.
  • the fibrous composition constituting the raw material intended for papermaking, an amount of 0.2% to 5% of cationic starch and an amount of 0.2 to 5% anionic starch.
  • the amounts of cationic and anionic starch are between 0.4% and 3%, more preferably between 0.7% and 2.5%, the percentages being expressed as dry starch relative to the dry fibrous composition.
  • the cationic and anionic starches are advantageously introduced into the fibrous composition in the form of a dilute aqueous glue with a concentration of less than 5%, preferably less than 3% and, more preferably, less than 1%, the lower limit being 0.01%. .
  • the proportion of cationic starch relative to the anionic starch must be between 10/1 and 1/10, preferably between 5/1 and 1/3 and, more preferably still, between 3/1 and 1/2, these ratios being expressed in dry weight of starch.
  • the point of introduction of the cationic and anionic starches is defined according to the physicochemical characteristics of the system, this choice resulting in different values of the contact time with the fibrous composition.
  • the optimal concentrations of cationic starch and anionic starch used in accordance with the invention are determined within the limits indicated, depending in particular on the mass of fibers used, and the aqueous medium used (ionic environment) or the characteristics specific to each paper machine.
  • cationic starches used in accordance with the invention are selected from those present both an electronic acceptor state, obtained using substituent groups of an electropositive nature, called cationic.
  • substituents are those containing a tertiary or quaternary nitrogen atom, although the phosphonium and sulfonium groups can also be used.
  • the electrophilic power of these starches is quantified by measuring the degree of substitution (DS), that is to say the number of hydroxyl functions which have been substituted by elementary glucoside unit.
  • DS degree of substitution
  • the DS is at most equal to 0.3; it is preferably between 0.02 and 0.20 and, more preferably, between 0.04 and 0.15.
  • the strength of the nucleophilic power of starches containing anionic groups should, in theory, be specified by the value of pKA, the DS is measured in practice.
  • the maximum value that the DS can reach is equal to 3. However, as a general rule, we will retain, for the anionic products targeted by the invention, a DS at most equal to 1.5 and, preferably, at most equal to 0.5.
  • the binding reactions on the starch of these cationic or anionic groups were carried out and described with starches from all sources such as those of corn, rice, wheat, potato, cassava and others. They can, according to an advantageous embodiment of the invention, be carried out on starches having previously undergone a more or less extensive crosslinking treatment. This treatment gives the anionic or cationic starches thus obtained particular properties resulting in greater freedom as to the choice of their point of introduction during their implementation in the context of the invention.
  • the presentoxy company was able to observe, at the level of the anionic starches and the cationic starches used, differences in behavior more or less visible, depending in particular on the cellulose pulps and the media. aqueous used.
  • cationic potato starch It is generally the cationic potato starch which is recognized as providing the best performance. Particular preference is given to anionic starches belonging to the group of sulfocarboxyalkyl derivatives.
  • the remarkable colloidal properties of the starches used in accordance with the invention have important repercussions on the manufacture of paper, making it possible for example to improve the retention of cellulose fines and of fillers during the preparation of the sheet and the speed of dripping water through the sheet.
  • flocculating agents traditionally used in stationery such as, for example, alumina sulfate, polychloride of AI , polyethyleneimine, polyacrylamide and others.
  • the installation in question comprises a vat 1 inside which is prepared the composition comprising a mass of fibers which is suspended and homogenized using an agitator 2. Stirring is maintained throughout the duration of the test. so as to ensure perfect regularity of supply to the circuit. It is however low enough not to modify over time the state of refining of the fibrous composition studied and not to degrade the flocs.
  • the fibrous composition is conveyed by a pipe 3 equipped with a pump P in a transit vat 4 provided with an agitator 5 and in which it can be maintained for a predetermined time to allow contact with one or more adjuvants used at this stage; it is also possible not to plan any stay in the vat room 4; in this case, the fibrous composition simply crosses the vat and is brought by a pipe 6 directly to a pump P 2 located at the outlet of the vat 4.
  • the fibrous composition will be drawn from the vat 1 with a rigorously constant flow.
  • the pipe 3 Downstream of the pump P i , the pipe 3 is equipped with an enclosure 7 inside which it is possible to adjust the pH of the fiber suspension by adding alkali or acid; and downstream of the enclosure 7, the pipe 3 comprises an element schematically shown at 8 and suitable for allowing the introduction of one or more adjuvants into the fibrous composition.
  • the pump P 2 routes the suspension of fibers through a line 9 to two mixers in series respectively M 1 and M 2 equipped with agitators respectively 10 and 11; the adjustment of the rotational speeds and the shape of the blades of the agitators 10 and 11 are chosen so that the conditions prevailing inside the mixers are as close as possible to the shear conditions existing in the wet part of an industrial circuit paper making.
  • Three elements schematically shown in 12, 13 and 14 and adapted to allow the introduction of adjuvants into the fibrous composition are arranged on the line 9 at the outlet of the pump P 2 for the first and respectively before the inlet of the mixers M 1 and M 2 for the other two; these elements allow you to choose on the order of introduction, the shear conditions before or after addition and the contact times between the adjuvants and the fibrous composition.
  • the enclosure 17 is also connected to a secondary circuit making it possible to bring a third part of the water under canvas contained in said enclosure via a pipe 21 fitted with a pump P 4 to a tubidimeter 22 at the outlet of which the waters under canvas which have passed through it are brought back to enclosure 17 by a pipe 23.
  • the turbidimeter 22 makes it possible to assess the content of water under canvas in mineral and organic materials (fibers, fillers and others); it turns out that the measurements carried out continuously using this device are in direct relation to the retention and more or less proportional to the amount of soluble and insoluble matter present in the water under canvas.
  • a photometer which can be that known under the brand NANOCOLOR 50D (manufactured by the Company Macherey-Nagel, 5160-Duren, RFA, and marketed by the Company Techmation, 20 Quai de la Marne, 75019 Paris), and which allows measurements to be made reflecting the overall level of starch fixation; the principle of these measurements is based on the expression of the difference between the measurement carried out on a supernatant stripped of a few minutes of rest of the cellulose fibers and of the fillers, and colored with iodine, and that carried out on the same non-colored supernatant .
  • the acidity was measured by simple assay from an N / 10 sodium solution with phenolphthalein as a colored indicator.
  • cationic starch By way of cationic starch, a cationic potato starch was used having a nitrogen content fixed on dry comprised between 0.55 and 0.60% (which corresponds to a DS comprised between 0.063 and 0.069); in this case, that marketed by the licensee under the brand HI-CATO 180.
  • HI-CAT® 180 cationic starch is introduced through element 8, hence a contact time of 5 minutes before switching to "Britt-Jar".
  • the anionic starches are introduced by the element 12, from where a contact time of 30 seconds before the passage on "Britt-Jar".
  • the amount of cationic starch used is 1% on a dry basis relative to the dry fibrous composition.
  • the quantity fixed is that allowing the lowest turbidimetric reading.
  • the cationic starch used is that of Example 1, prepared under the same conditions.
  • the installation is that of the single figure.
  • the amounts of cationic and anionic starch are expressed on a dry basis relative to the dry fibrous composition contained in the vat 1.
  • the measurements carried out are those of the turbidity of the water under canvas, the web retention and the amount of starch (in mgll) found in the water under canvas determined by enzymatic assay.
  • the fibrous composition was taken after the second mixer, instead of carrying out the measurements on "Britt-Jar” and “formettes” (sheets of paper) of a grammage were prepared. approximately 150 glm 2 using this paste using the RAPID-KOETHEN type material marketed for example by the company Enrico Toniolo SpA (Milan, Italy) and well known to those skilled in the art.
  • the cationicity of the starch is varied.
  • a thick pulp obtained from old paper was removed on an industrial machine, then diluted with the canvas water from the same machine to form the fibrous composition intended to supply the installation according to the single figure.
  • a first cationic starch was used, namely that of Example 1, which was prepared by cooking in a continuous cooker.
  • a second cationic starch namely a cationic starch having an average DS of 0.12 (1% of fixed nitrogen) referenced AMIDON 608, was also used.
  • the anionic starch used is one of those used in Example 1, namely the starch sulfosuccinate VECTOR® A 180.
  • STARCH 608 and VECTOR® A 180 were cooked in an open vat with live steam (5 minutes at 95-98%) from milk with 4% commercial dry matter. The adhesives thus obtained were then diluted to 2% with cold water.
  • the installation used is that shown in the single figure.
  • the cationic starches were introduced by element 8, which gives a contact time of 5 minutes.
  • the anionic starch was introduced by element 12, which gives a contact time of 30 seconds.
  • the quantities of anionic starch used are those for which the turbidimetric reading is the lowest.
  • Tests 13, 14 and 15 clearly demonstrate that, under the conditions adopted for this example, the use of a cationic starch with a higher DS makes it possible to increase the retention while bringing about a clarification of the waters under canvas.
  • Test 16 shows that the successive use of a cationic starch of the AMIDON 608 type and of an anionic starch leads to very clear water under canvas despite high doses of starchy plants (approximately 3%) and to excellent retention. In addition, the amount of starch attached is remarkable.
  • composition was taken from an industrial machine, then diluted with water under canvas from the same machine.
  • a cationic starch having a fixed nitrogen content of between 0.35 and 0.40 ie a DS between 0.04 and 0.046 was used, in occurrence that marketed by the Applicant Company under the HI-CAT® 142 brand.
  • the method of preparation proper for its implementation is that described for the cationic starch HI-CAT® 180.
  • anionic starch VECTOR® A 180 was used as anionic starch.
  • the cationic starch is introduced through element 8, which gives a contact time of 5 minutes.
  • the anionic starch is introduced through the element 12, which gives a contact time of 30 seconds.
  • the fixing of starches on the fibers is likewise improved.
  • the preparation is obtained with the help of which the system is fed according to the single figure.
  • the pH is adjusted to a value of 7-7.2 by the introduction of dilute sodium hydroxide at the junction 20 of the lines 19 and 9.
  • the cationic starch is introduced through element 8, which gives a contact time of 5 minutes.
  • Anionic starch is introduced through element 12, which gives a contact time of 30 seconds.
  • the amount of anionic starch was chosen so that the lowest turbidimetric reading was obtained.

Landscapes

  • Paper (AREA)
  • Making Paper Articles (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Materials For Medical Uses (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Inorganic Fibers (AREA)
  • Polarising Elements (AREA)

Claims (9)

1. Verfahren zur Herstellung von Papier, dadurch gekennzeichnet, daß man in die das Ausgangsmaterial bildende Faserzusammensetzung an zwei oder mehreren Stellen, insbesondere im Naßteil, getrennt voneinander eine (oder mehrere) kationische Stärke(n) und eine (oder mehrere), von einem Stärkephosphatverschiedene anionische Stärke(n) einbringt.
2. Verfahren zur Herstellung von Papier nach Anspruch 1, dadurch gekennzeichnet, daß die kationischen Stärken unter jenen ausgewählt werden, die einen Elektronenakzeptorzustand aufweisen, der mittels elektropositiver substituierender Gruppen erhalten ist, wobei die am häufigsten verwendeten Substituenten jene sind, die ein tertiäres oder quaternäres Stickstoffatom enthalten und wobei auch Phosphoniumgruppen und Sulfoniumgruppen verwendet werden können.
3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Substitutionsgrad der eingesetzten kationischen Stärke höchstens 0,3 beträgt und vorzugsweise zwischen 0,02 und 0,20 und noch stärker bevorzugt zwischen 0,04 und 0,15 liegt.
4. Verfahren zur Herstellung von Papier nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die anionische Stärke aus der die Stäkephosphonate, Carboxyalkylstärken und vorzugsweise Stärkesulfate, sulfoalkylierte Stärken und sulfocarboxyalkylierte Stärken umfassenden Gruppe ausgewählt wird.
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Substitutionsgrad der eingesetzten anionischen Stärke höchstens 1,5, vorzugsweise höchstens 0,5, beträgt.
6. Verfahren zur Herstellung von Papier nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß man zu der das Ausgangsmaterial darstellenden Faserzusammensetzung eine Menge von 0,2 bis 5% kationische. Stärke und eine Menge von 0,2 bis 5% anionische Stärke zusetzt, wobei die Prozentsätze als trockene Stärke, bezogen auf die trockene Faserzusammensetzung, ausgedrückt sind.
7. Verfahren zur Herstellung von Papier nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Mengen an eingesetzter kationischer Stärke und eingesetzter anionischer Stärke von 0,4% bis 3%, stärker bevorzugt von 0,7% bis 2,5% betragen, wobei die Prozentsätze als trockene Stärke, bezogen auf die trockene Faserzusammensetzung, ausgedrückt sind.
8. Verfahren zur Herstellung von Papier nach eiern der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die kationischen Stärken und die anionischen Stärken in die Faserzusammensetzung in Form eines verdünnten, wäßrigen Leimes mit einer Konzentration von unter 5%, vorzugsweise unter 3% und noch stärker bevorzugt unter 1%, eingeführt werden, wobei die Mindestkonzentration 0,01 % beträgt.
9. Verfahren zur Herstellung von Papier nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das Verhältnis von kationischer Stärke zu anionischer Stärke im Bereich 10 : 1 bis 1 : 10, vorzugsweise 5 : 1 bis 1 : 3 und noch stärker bevorzugt von 3 : 1 bis," beträgt, wobei diese Verhältnisse als Trockengewicht der Stärke angegeben sind.
EP88400568A 1987-03-13 1988-03-10 Verfahren zur Papierherstellung Expired - Lifetime EP0282415B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88400568T ATE63343T1 (de) 1987-03-13 1988-03-10 Verfahren zur papierherstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8703481 1987-03-13
FR8703481A FR2612213B1 (fr) 1987-03-13 1987-03-13 Procede de fabrication du papier

Publications (3)

Publication Number Publication Date
EP0282415A1 EP0282415A1 (de) 1988-09-14
EP0282415B1 true EP0282415B1 (de) 1991-05-08
EP0282415B2 EP0282415B2 (de) 1999-10-06

Family

ID=9348951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88400568A Expired - Lifetime EP0282415B2 (de) 1987-03-13 1988-03-10 Verfahren zur Papierherstellung

Country Status (14)

Country Link
US (1) US5129989A (de)
EP (1) EP0282415B2 (de)
JP (1) JP2667185B2 (de)
AT (1) ATE63343T1 (de)
AU (1) AU608577B2 (de)
CA (1) CA1302020C (de)
DE (1) DE3862661D1 (de)
DK (1) DK169573B1 (de)
ES (1) ES2022649T5 (de)
FI (1) FI93133C (de)
FR (1) FR2612213B1 (de)
GR (2) GR3001914T3 (de)
NO (1) NO170893C (de)
PT (1) PT86961B (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU657991B2 (en) * 1991-07-02 1995-03-30 Eka Nobel Ab A process for the production of paper
DE69519231T2 (de) * 1994-08-16 2001-05-17 Chemisolv Ltd., Urmston Verfahren zur erhöhung der festigkeit von papier
FR2732368B1 (fr) * 1995-03-31 1997-06-06 Roquette Freres Nouveau procede de fabrication de papier
FR2734005B1 (fr) * 1995-05-12 1997-07-18 Roquette Freres Composition et procede pour le collage du papier
FR2743810B1 (fr) 1996-01-23 1998-04-10 Roquette Freres Polysaccharides cationiques modifies, compositions pour le collage les contenant et procedes pour le collage de structures planes mettant en oeuvre ces compositions
FR2748744B1 (fr) * 1996-05-15 1998-08-14 Roquette Freres Nouvelle composition de platre contenant un compose amylace
CA2334532C (en) * 1998-06-10 2008-03-11 Cooeperatieve Verkoop- En Productievereniging Van Aardappelmeel En Derivaten Avebe B.A. A process for making paper
CA2282211C (en) * 1998-10-16 2007-01-09 Grain Processing Corporation Process for preparing a paper web
US6413372B1 (en) * 1999-04-20 2002-07-02 National Starch And Chemical Investment Holding Corporation Starch polymer combinations used in papermaking
FR2794479B1 (fr) * 1999-06-04 2001-09-21 Roquette Freres Composition et procede pour la fabrication de structures planes, en particulier du papier ou du carton
WO2001094699A1 (en) * 2000-06-02 2001-12-13 National Starch And Chemical Investment Holding Corporation A method of making paper
US6818100B2 (en) * 2000-08-07 2004-11-16 Akzo Nobel N.V. Process for sizing paper
US20020166648A1 (en) * 2000-08-07 2002-11-14 Sten Frolich Process for manufacturing paper
US20040104004A1 (en) * 2002-10-01 2004-06-03 Fredrik Solhage Cationised polysaccharide product
US20040138438A1 (en) * 2002-10-01 2004-07-15 Fredrik Solhage Cationised polysaccharide product
FR2854898B1 (fr) 2003-05-12 2007-07-13 Roquette Freres Procede de cationisation d'amidons issus de legumineuses, amidons cationiques ainsi obtenus et leurs applications
US20060213630A1 (en) * 2005-03-22 2006-09-28 Bunker Daniel T Method for making a low density multi-ply paperboard with high internal bond strength
CL2008002019A1 (es) 2007-07-16 2009-01-16 Akzo Nobel Chemicals Int Bv Composicion de carga que comprende una carga, un compuesto inorganico cationico, un compuesto organico cationico y un polisacarido anionico; metodo para preparar dicha composicion; uso como aditivo para una suspension celulosica acuosa; procedimiento para producir papel; y papel.
FR2923832B1 (fr) 2007-11-20 2011-01-07 Roquette Freres Composition anionique aqueuse contenant au moins un amidon anionique gelatinise, soluble et, de preference, un amidon anionique insoluble, non gelatinise ou partiellement gonfle.
AT511413B1 (de) * 2011-05-10 2015-02-15 Steindl Roman Dipl Ing Verfahren zur herstellung von papierprodukten
WO2014117964A1 (en) * 2013-01-31 2014-08-07 Glatfelter Gernsbach Gmbh & Co. Kg Crosslinking/functionalization system for a paper or non-woven web
WO2014144025A1 (en) * 2013-03-15 2014-09-18 Dober Chemical Corp. Dewatering compositions and methods
FI20185272A1 (en) 2018-03-22 2019-09-23 Kemira Oyj The dry strength composition, its use, and the method of making paper, board or the like

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL262737A (de) * 1960-03-24
US3269852A (en) * 1963-02-01 1966-08-30 Miles Lab Cellulosic product of improved strength and process therefor
US4066495A (en) * 1974-06-26 1978-01-03 Anheuser-Busch, Incorporated Method of making paper containing cationic starch and an anionic retention aid
GR65316B (en) * 1978-06-20 1980-08-02 Arjomari Prioux Method for the preparation of fibrous leaf
FR2435554A1 (fr) * 1978-09-08 1980-04-04 Dalle & Lecomte Papeteries Produit papetier a forte teneur en charge
CA1139747A (en) * 1979-08-15 1983-01-18 Martin M. Tessler Starch ether derivatives, a method for the preparation thereof and their use in paper
SE8403062L (sv) * 1984-06-07 1985-12-08 Eka Ab Forfarande vid papperstillverkning

Also Published As

Publication number Publication date
PT86961A (pt) 1988-04-01
DK169573B1 (da) 1994-12-05
CA1302020C (en) 1992-06-02
AU608577B2 (en) 1991-04-11
AU1304088A (en) 1988-09-15
JPS63264997A (ja) 1988-11-01
US5129989A (en) 1992-07-14
FR2612213A1 (fr) 1988-09-16
DK135088A (da) 1988-09-14
PT86961B (pt) 1992-06-30
FI93133B (fi) 1994-11-15
DE3862661D1 (de) 1991-06-13
EP0282415A1 (de) 1988-09-14
GR3032281T3 (en) 2000-04-27
NO170893B (no) 1992-09-14
EP0282415B2 (de) 1999-10-06
FR2612213B1 (fr) 1989-06-30
FI93133C (fi) 1995-02-27
NO881107L (no) 1988-09-14
ATE63343T1 (de) 1991-05-15
ES2022649T5 (es) 1999-12-16
NO881107D0 (no) 1988-03-11
ES2022649B3 (es) 1991-12-01
GR3001914T3 (en) 1992-11-23
FI881107A (fi) 1988-09-14
NO170893C (no) 1992-12-23
FI881107A0 (fi) 1988-03-09
JP2667185B2 (ja) 1997-10-27
DK135088D0 (da) 1988-03-11

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