EP2024564A1 - Collage de papier - Google Patents

Collage de papier

Info

Publication number
EP2024564A1
EP2024564A1 EP07748534A EP07748534A EP2024564A1 EP 2024564 A1 EP2024564 A1 EP 2024564A1 EP 07748534 A EP07748534 A EP 07748534A EP 07748534 A EP07748534 A EP 07748534A EP 2024564 A1 EP2024564 A1 EP 2024564A1
Authority
EP
European Patent Office
Prior art keywords
nitrogen
containing organic
organic compound
process according
sizing agent
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.)
Withdrawn
Application number
EP07748534A
Other languages
German (de)
English (en)
Inventor
Jonas LIESÉN
Jeanette RISÉN
Kristina Mohlin
Agneta Lernbrink
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.)
Akzo Nobel NV
Nouryon Pulp and Performance Chemicals AB
Original Assignee
Akzo Nobel NV
Eka Chemicals 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 Akzo Nobel NV, Eka Chemicals AB filed Critical Akzo Nobel NV
Priority to EP07748534A priority Critical patent/EP2024564A1/fr
Publication of EP2024564A1 publication Critical patent/EP2024564A1/fr
Withdrawn legal-status Critical Current

Links

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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/06—Paper forming aids
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/07—Nitrogen-containing compounds
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • 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
    • 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
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/17—Ketenes, e.g. ketene dimers
    • 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
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D21H17/45—Nitrogen-containing groups
    • D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
    • 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
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in 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
    • 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

  • the present invention generally relates sizing of paper and paper board.
  • Cellulose-reactive sizing agents such as those based on alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA), are widely used in papermaking at neutral or slightly alkaline stock pH's in order to give paper and paper board some degree of resistance to wetting and penetration by aqueous liquids.
  • Paper sizes based on cellulose-reactive sizing agents are generally provided in the form of dispersions containing an aqueous phase and finely divided particles or droplets of the sizing agent dispersed therein.
  • Cellulose-reactive sizing agents generally provide good sizing effect using low dosages of the sizing agent when added to the aqueous cellulosic suspension.
  • the sizing effect starts to develop in the drying section of the paper machine.
  • the time in the drying section is often not long enough to produce sized paper on-machine. Instead the paper has to be allowed to cure for up to 24 hours before a fully sized product can be achieved.
  • This slow development of the sizing effect creates a number of problems. Firstly, subsequent operations such as printing, coating, pasting, etc. may be difficult to handle. Secondly, many paper makers continuously overdose the sizing agents to make sure that a fully sized product is achieved. Consequently, problems in terms of deposits on machine components are usually created.
  • WO 9710387 discloses a paper sizing enhancer which is a polymerization reaction product of a quaternary diallylammonium monomer and a diallylammonium monomer.
  • the polymerization product has a molecular weight of at least 10,000.
  • WO 9710387 discloses that the paper sizing enhancer may be introduced into a paper furnish during the papermaking process in combination with the paper sizing agent, either separately or as an aqueous medium containing both components.
  • WO 02081587 discloses a sizing dispersion containing a sizing agent and a non-ionic surface active monoester of glycerol with a fatty acid. It is an object of this invention to provide a process for the production of paper with improved initial sizing on-machine. It is also an object of the invention to provide faster curing times for sizing agent. Further objects will appear hereinafter.
  • the present invention concerns a process for the production of paper which comprises:
  • the present invention further concerns a process for the production of paper which comprises:
  • improved initial sizing i.e. faster development of the sizing effect or faster curing of paper, in papermaking can be achieved by separately adding to a cellulosic suspension a nitrogen- containing organic compound having a molecular weight of less than 1 ,000 and a cellulose-reactive sizing agent. It has also been found that improved initial sizing can be achieved by adding to the suspension a pre-mix of the nitrogen-containing organic compound and an aqueous dispersion of a cellulose-reactive sizing agent. Faster curing provides faster feedback on sized products, minimizes the risk of overdosing the sizing agent which, in turn, may result in less deposits in the paper machine.
  • the nitrogen-containing organic compound according to the invention can be selected from primary amines, secondary amines, tertiary amines, quaternary amines, which are also referred to as quaternary ammonium compounds.
  • the nitrogen-containing compound is preferably water-soluble or water-dispersible and it can be aromatic, i.e. containing one or more aromatic groups, or aliphatic; the aliphatic nitrogen-containing water-dispersible organic compounds usually being preferred.
  • the nitrogen-containing organic compound can be uncharged or cationic.
  • Suitable nitrogen-containing organic compounds include acid addition salts of primary, secondary and tertiary amines and, preferably, quaternary ammonium compounds.
  • the nitrogen-containing organic compound may have one or more oxygen-containing substituents, for example with oxygen in the form of hydroxyl groups and/or alkyloxy groups. Examples of preferred substituents of this type include hydroxyl groups, e.g. ethanol groups, and methoxy and ethoxy groups.
  • the nitrogen-containing organic compounds may include one or more nitrogen atoms, preferably one or two.
  • the nitrogen-containing organic compound has a molecular weight of less than 1 ,000, suitably less than 900 or 800 and preferably less than 750 or 600. Usually, the molecular weight of the nitrogen-containing organic compound is at least 250, preferably at least 330.
  • suitable nitrogen-containing organic compounds include compounds prepared by reacting a primary, secondary or tertiary amine with methyl chloride, dimethyl sulphate and benzyl chloride.
  • suitable quaternary ammonium compounds further include compounds having the general formula R 4 N X , wherein each R group is independently selected from (i) hydrogen; (ii) hydrocarbon groups, suitably aliphatic and preferably alkyl groups, having from 1 to about 30 carbon atoms, preferably from 1 to 22 carbon atoms; and (iii) hydrocarbon groups, suitably aliphatic and preferably alkyl groups, having up to about 30 carbon atoms, preferably from 4 to 22 carbon atoms, and being interrupted by one or more heteroatoms, e.g.
  • the nitrogen-containing organic compound of the invention is preferably substantially free from silica-based particles.
  • Suitable primary amines i.e. amines having one organic substituent
  • alkylamines e.g. propylamine, butylamine, cyclohexylamine, alkanolamines, e.g. ethanolamine, and alkoxyalkylamines, e.g. 2-methoxyethylamine.
  • suitable secondary amines i.e. amines having two organic substituents, include dialkylamines, e.g. diethylamine, dipropylamine and di-isopropylamine, dialkanolamines, e.g. diethanolamine, and pyrrolidine.
  • suitable tertiary amines i.e.
  • amines having three organic substituents include trialkylamines, e.g. triethylamine, trialkanolamines, e.g. triethanolamine, N,N-dialkylalkanolamines, e.g. N,N-dimethylethanolamine.
  • trialkylamines e.g. triethylamine
  • trialkanolamines e.g. triethanolamine
  • N,N-dialkylalkanolamines e.g. N,N-dimethylethanolamine.
  • quaternary ammonium compounds include methyl bis[ethyl (tallowate)] - 2- hydroxyethyl ammonium methyl sulphate, dioctyldimethylammonium chloride, didecyldi- methylammonium chloride, dicocodimethylammonium chloride, cocobenzyldimethylammo- nium chloride, coco(fractionated)benzyldimethylammonium chloride, octadecyl trimethyl- ammonium chloride, dioctadecyl dimethylammonium chloride, dihexadecyl dimethylammo- nium chloride, di(hydrogenated tallow)dimethylammonium chloride, di(hydrogenated tallow)- benzylmethylammonium chloride, di(hydrogenated tallow fatty acids-2-hydroxyethyl ester) dimethyl ammonium chloride, (hydrogenated tallow)benzylmethyl
  • suitable diamines include aminoalkylalkanolamines, e.g. aminoethylethanolamine, piperazine and nitrogen-substituted piperazines having one or two lower alkyl groups of 1 to 4 carbon atoms.
  • suitable imidazoline derivates include quaternary imidazolinium compounds, e.g. 2-(C17 and C17 unsaturated alkyl)-1-[2-(C18 and C18-unsaturated amido) ethyl]-4,5-dihydro-1 -methyl, methyl sulfates.
  • Examples of preferred nitrogen- containing organic compounds include methyl bis[ethyl (tallowate)] - 2- hydroxyethyl ammonium methyl sulphate, di(hydrogenated tallow)dimethylammonium chloride, di(hydrogenated tallow fatty acids-2-hydroxyethyl ester) dimethyl ammonium chloride, didecyldimethylammonium chloride, (vegetableoil)benzyl-dimethylammonium chloride and (dodecyl)benzyl-dimethylammonium chloride.
  • the cellulose-reactive sizing agent can be selected from the group consisting of hydrophobic ketene dimers, ketene multimers, acid anhydrides, organic isocyanates and mixtures thereof, preferably ketene dimers, ketene multimers and acid anhydrides, most preferably ketene dimers.
  • Suitable ketene dimers have the general formula (I) below, wherein R 1 and R 2 represent saturated or unsaturated hydrocarbon groups, usually saturated hydrocarbons, the hydrocarbon groups suitably having from 8 to 36 carbon atoms, usually being straight or branched chain alkyl groups having 12 to 20 carbon atoms, such as hexadecyl and octadecyl groups.
  • Suitable acid anhydrides can be characterized by the general formula (II) below, wherein R 3 and R 4 can be identical or different and represent saturated or unsaturated hydrocarbon groups suitably containing from 8 to 30 carbon atoms, or R 3 and R 4 together with the -C-O-C- moiety can form a 5 to 6 membered ring, optionally being further substituted with hydrocarbon groups containing up to 30 carbon atoms.
  • acid anhydrides which are used commercially include alkyl and alkenyl succinic anhydrides and particularly isooctadecenyl succinic anhydride.
  • Suitable ketene dimers, acid anhydrides and organic isocyanates include the compounds disclosed in U.S. Pat. No. 4,522,686, which is hereby incorporated herein by reference.
  • the dispersions of this invention contain a dispersant or a dispersant system comprising one or more dispersing agents and protective colloids.
  • the dispersing agents and protective colloids can be selected from anionic, non-ionic, cationic and amphoteric compounds which separately or together may function as dispersing agent or dispersant system for the cellulose-reactive sizing agent.
  • the dispersions according to the invention can have contents of cellulose-reactive sizing agents from about 0.1 % by weight up to about 30% by weight.
  • the content of cellulose-reactive sizing agent is suitably within the range of from 5 to 25% and preferably from 8 to 20% by weight.
  • the dispersing agents and protective colloids can be any of those conventionally used in the preparation of aqueous sizing dispersions or emulsions. They can for example be selected from saponified rosin derivatives, alkyl sulphates, alkylaryl sulphates, alkyl sulphonates, alkylaryl sulphonates, etc. Particularly suitable anionic dispersing agents are alkyl sulphates and alkyl sulphonates, e.g. sodium lauryl sulphate, as well as sodium lignosulphonate and sodium naphthalene sulphonate.
  • Suitable protective colloids include water- soluble cellulose-derivatives such as hydroxyethyl- and hydroxy propyl-, methyl- hydroxy propyl- and ethylhydroxyethylcellulose, methyl- and carboxymethylcellulose, gelatin, starch, guar gum, xanthan gum, polyvinyl alcohol, etc..
  • suitable non-ionic dispersing agents can for example be selected from fatty alcohols, ethoxylated fatty alcohols, fatty acids, alkyl phenols or fatty acid amides, ethoxylated or non-ethoxylated glycerol esters, sorbitan esters of fatty acids, etc..
  • Suitable cationic dispersing agents and protective colloids include water-soluble nitrogen-containing epichlorohydrin resins and cationic starches, etc..
  • the dispersion may also contain other additives such as preservative agents.
  • the amount of dispersing agent is at least 0.5% by weight, based on the amount of sizing agent. Normally, it is not necessary to use more than 10% by weight.
  • the nitrogen-containing organic compound of the invention and the cellulose-reactive sizing agent can be separately added to the cellulosic suspension in any order.
  • the nitrogen- containing organic compound can be separately added prior to, simultaneously with or after adding the cellulose-reactive sizing agent and preferably prior to adding the cellulose- reactive sizing agent.
  • the nitrogen-containing organic compound and the aqueous dispersion of cellulose-reactive sizing agent can also be added to the cellulosic suspension as a pre-mix.
  • the nitrogen-containing organic compound and the sizing dispersion are mixed to form a pre-mix before addition to the cellulosic suspension.
  • the mixing can be done by bringing into contact some time before the addition the nitrogen-containing organic compound, suitably an aqueous phase thereof and preferably an aqueous stream thereof, and the sizing dispersion, preferably an aqueous stream thereof.
  • the obtained aqueous phase or stream is then introduced to the cellulosic suspension.
  • the contact time i.e. the time from mixing the nitrogen-containing organic compound and the sizing dispersion to adding the pre-mix so formed to the cellulosic suspension.
  • This period of time can be less than about 20 minutes, suitably less than 4 minutes and preferably less than 2 minutes.
  • the mixing of aqueous streams of the nitrogen-containing organic compound and the sizing dispersion can be effected by directing the separate streams to be mixed towards each other, allowing them to impinge on each other and introducing the pre-mix stream so formed into the cellulosic suspension.
  • Suitably mixing is carried out under turbulent flow conditions, which promote more intensive and rapid mixing of the streams.
  • the streams can be mixed by means of any mixing device having at least two inlets into which separate streams to be mixed are supplied and having at least one outlet through which the resulting pre-mix is passed and subsequently introduced to the cellulosic suspension. This stream mixing embodiment is advantageous from a practical point of view and confers operational benefits.
  • the nitrogen-containing organic compound and the cellulose-reactive sizing agent can be added to the cellulosic suspension at any position, e.g. anywhere between the machine chest and the headbox.
  • the nitrogen-containing organic compound and the cellulose-reactive sizing agent can be added to the cellulosic suspension in amounts that can vary within wide limits, where the dosage is mainly dependent on the quality of the pulp or paper to be sized, the cellulose- reactive sizing agent used and the level of sizing desired.
  • the nitrogen-containing organic compound is suitably added to the cellulosic suspension in an amount of from 0.005 to 0.5% by weight, preferably of from 0.01 to 0.3% by weight and most preferably of from 0.02 to 0.1 % by weight based on the dry weight of the cellulosic suspension.
  • the cellulose-reactive sizing agent is suitably added to the cellulosic suspension in an amount of from 0.01 to 1.0% by weight, preferably of from 0.05 to 0.5% by weight based on the dry weight of the cellulosic suspension.
  • paper is meant to include not only paper but all types of cellulose-based products in sheet and web form, including, for example, board, paperboard and particularly liquid packaging board.
  • the process according to the invention can be used in the production of paper from different types of cellulosic suspensions of cellulose-containing fibres and the suspensions should suitably contain at least 25% by weight and preferably at least 50% by weight of such fibres, based on dry substance.
  • the suspension can be based on fibres from chemical pulp such as sulphate, sulphite and organosolv pulps, mechanical pulp such as thermomechanical pulp, chemo-thermomechanical pulp, refiner pulp and groundwood pulp, from both hardwood and softwood, and can also be based on recycled fibres, optionally from de-inked pulps, and mixtures thereof.
  • the cellulosic suspension may optionally also contain mineral fillers. Examples of mineral fillers of conventional types include kaolin, china clay, titanium dioxide, gypsum, talc and natural and synthetic calcium carbonates such as chalk, ground marble and precipitated calcium carbonate.
  • the pH of the cellulosic suspension can be within the range of from about 3 to about 10. The pH is suitably above 3.5 and preferably within the range of from 4 to 9.
  • Chemicals conventionally added to the cellulosic suspension in papermaking such as retention aids, aluminium compounds, dyes, wet-strength resins, optical brightening agents, etc., can of course be used in conjunction with the present dispersions.
  • aluminium compounds include alum, aluminates and polyaluminium compounds, e.g. polyaluminium chlorides and sulphates.
  • suitable retention aids include cationic polymers, anionic inorganic materials in combination with organic polymers, e.g. bentonite in combination with cationic polymers, silica-based sols in combination with cationic polymers or cationic and anionic polymers.
  • Suitable cationic polymers include cationic starch, guar gum, acrylate-based and acrylamide-based polymers, polyethyleneimine, dicyandiamide-formaldehyde resins, polyamines, polyamido- amines and poly(diallyldimethyl ammoniumchloride) and combinations thereof.
  • Cationic starch and cationic acrylamide-based polymers are preferably used, either alone or in combination with each other or with other materials.
  • AKD sizing of liquid packaging board was performed on an experimental paper machine which comprised a machine chest, two separate pumping arrangements, defoamer, screen, headbox and a wire, where the cellulosic suspension was dewatered to form a sheet.
  • the nitrogen-containing organic compounds used in the following Examples are those described in Table 1.
  • the cellulosic suspension comprised 100% bleached CTMP.
  • Two different nitrogen- containing organic compounds were used in the tests: A and E.
  • the addition of the nitrogen containing compound to the cellulosic suspension took place after the machine chest.
  • a reference without addition of nitrogen-containing organic compound was also performed.
  • Cationic starch (Raisamyl 142) was dosed at two points; after the first pumping arrangement (P1 ) 2 kg/tonne and before the second pumping arrangement (P2) 3 kg/tonne.
  • the AKD (Eka DH 28HF) sizing agent was dosed before the P2 and a silica sol (Eka NP 442) was dosed after the P2 (3 kg/tonne as received). pH at the head box was 8.0.
  • the papermaking conditions were the same as in Example 1. Two different dosages (0.25 kg/tonne and 0.5 kg/tonne) of the nitrogen-containing organic compounds were tested at two dosage levels of AKD (1 kg/tonne and 1.5 kg/tonne).
  • sizing performance was tested as Cobb 6 o-value on paper when nitrogen- containing organic compounds were added in different addition modes. Further, sizing performance was tested when using a nitrogen-containing organic compound according to the present invention and polyDADMAC polymer.
  • the cellulosic suspension contained 80% hardwood and 20% softwood and had a fiber concentration of 0.5 %. No filler was added. The conductivity was 0.3 mS/cm and pH was about 8.
  • Hand sheets were prepared according to the standard method SCAN-C26:76 and sizing property was measured as Cobb 6 o value according to the standard method Tappi T441.
  • a first retention system comprising 0.75 kg/tonne cationic polyacrylamide (Eka PL 1510) and 1 kg/tonne of silica sol (Eka NP 442), calculated as dry substances on dry cellulosic suspension. The results are presented in Table 5.
  • a second retention system was used comprising 5 kg/tonne of cationic potato starch (Perlbond 980) and 1 kg/tonne of silica sol (Eka NP 442), calculated as dry substances on dry cellulosic suspension. The results are presented in Table 6.
  • the dosage of the cationic polyacrylamide (EKA PL 1510) was reduced to 0.5 kg/tonne in the cases where polyDADMAC (F) was added to the paper fiber suspension.
  • the sizing agent AKD (Eka DR 28 HF) was added in an amount of 0.45 kg/tonne and the nitrogen-containing organic compound, Arquad HTB-75 (C), according to the invention was either added:
  • liquid packaging board was prepared on an experimental paper machine as described in Example 1 and the sizing performance was tested as Cobb 6 o-value according to the standard method Tappi T441.
  • the cellulosic suspension contained 80% hardwood (40% eucalyptus and 40% birch) and 20% softwood and had a fiber concentration of 1.5%. No filler was added.
  • the pH was 7.1.
  • a retention system was used comprising 0.375 kg/tonne cationic polyacrylamide (Eka PL 1510) and 0.15 kg/tonne silica sol (Eka NP 442), calculated as dry substances on dry cellulosic suspension.
  • a nitrogen-containing organic compound, Arquad HTB-75 (C) or Armosoft DEQ (G), according to the invention was added before the sizing agent AKD (Eka DR 28 HF).
  • Armosoft DEQ (G) was also added after the addition of the AKD.
  • liquid packaging board was prepared on an experimental paper machine as described in Example 1 and the sizing performance was tested as Cobbeo-value according to the standard method Tappi T441.
  • the cellulosic suspension comprised 100% bleached
  • CTMP which had a fiber concentration of 1.35 %. No filler was added.
  • the pH was 5.6 and the conductivity was 219 ⁇ S/cm.
  • the nitrogen-containing organic compounds according to the invention have a positive effect on the initial sizing of AKD. It is possible to reach low Cobb 6 o-values already after 1 h. The final sizing degree is not affected by the addition of the nitrogen- containing organic compound. The tensile index is not decreased by the addition of the nitrogen-containing organic compounds.
  • the nitrogen-containing organic compounds according to the invention function together with AKD in amounts of from about 0.05 to about 5 kg/tonne calculated on dry pulp, preferably from about 0.1 to about 3 kg/tonne calculated on dry pulp and most preferably from about 0.2 to about 1 kg/tonne calculated on dry pulp.

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  • Paper (AREA)

Abstract

La présente invention concerne un procédé de fabrication de papier, comprenant les étapes consistant à : (a) utiliser une suspension cellulosique aqueuse ; (b) ajouter séparément à la suspension : (i) un composé organique contenant de l'azote ayant une masse moléculaire inférieure à 1 000 ; et (ii) un agent de collage réactif avec la cellulose ; et (c) déshydrater la suspension obtenue pour former du papier. L'invention concerne également un procédé selon lequel un composé organique contenant de l'azote ayant une masse moléculaire inférieure à 1 000 est mélangé avec une dispersion aqueuse d'un agent de collage réactif avec la cellulose pour former un pré-mélange, ledit pré-mélange étant ajouté à la suspension.
EP07748534A 2006-06-01 2007-05-30 Collage de papier Withdrawn EP2024564A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07748534A EP2024564A1 (fr) 2006-06-01 2007-05-30 Collage de papier

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06114821 2006-06-01
PCT/SE2007/050373 WO2007139500A1 (fr) 2006-06-01 2007-05-30 Collage de papier
EP07748534A EP2024564A1 (fr) 2006-06-01 2007-05-30 Collage de papier

Publications (1)

Publication Number Publication Date
EP2024564A1 true EP2024564A1 (fr) 2009-02-18

Family

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EP07748534A Withdrawn EP2024564A1 (fr) 2006-06-01 2007-05-30 Collage de papier

Country Status (9)

Country Link
EP (1) EP2024564A1 (fr)
JP (1) JP2009538998A (fr)
KR (1) KR20090023579A (fr)
CN (1) CN101460680A (fr)
AU (1) AU2007268301A1 (fr)
BR (1) BRPI0712698A2 (fr)
CA (1) CA2653791A1 (fr)
RU (1) RU2008152816A (fr)
WO (1) WO2007139500A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102011344B (zh) * 2010-06-29 2013-04-17 上海东升新材料有限公司 静电复印纸用表面施胶剂及其制备方法和应用
FI126041B (fi) * 2011-09-12 2016-06-15 Stora Enso Oyj Menetelmä retention säätämiseksi ja menetelmässä käytettävä välituote
CN105603818B (zh) * 2016-01-14 2018-06-12 青岛科技大学 一种阳离子乳化剂制备的akd中性施胶剂及方法和应用
CN106283868B (zh) * 2016-08-17 2017-10-03 中山市升信纸品有限公司 一种快熟耐水型akd施胶剂的制备方法
CN106758536B (zh) * 2016-12-30 2018-09-18 安徽华邦古楼新材料有限公司 一种轻涂数码热转印纸的生产方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3046186A (en) * 1957-06-12 1962-07-24 American Cyanamid Co Cationic sizing emulsions and paper sized therewith
AR244372A1 (es) * 1990-04-11 1993-10-20 Hercules Inc Pretratamiento de rellenador con dimero de reteno cationico.
SE9404201D0 (sv) * 1994-12-02 1994-12-02 Eka Nobel Ab Sizing dispersions
US5969011A (en) * 1997-02-05 1999-10-19 Akzo Nobel Nv Sizing of paper
SE9704931D0 (sv) * 1997-02-05 1997-12-30 Akzo Nobel Nv Sizing of paper
CN100558983C (zh) * 2002-03-04 2009-11-11 艾莫考国际公司 纸和材料及其生产方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007139500A1 *

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RU2008152816A (ru) 2010-07-20
WO2007139500A1 (fr) 2007-12-06
CA2653791A1 (fr) 2007-12-06
CN101460680A (zh) 2009-06-17
JP2009538998A (ja) 2009-11-12

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