EP1529133B1 - Verfahren zur herstellung von papier, pappe und karton - Google Patents

Verfahren zur herstellung von papier, pappe und karton Download PDF

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Publication number
EP1529133B1
EP1529133B1 EP03784048A EP03784048A EP1529133B1 EP 1529133 B1 EP1529133 B1 EP 1529133B1 EP 03784048 A EP03784048 A EP 03784048A EP 03784048 A EP03784048 A EP 03784048A EP 1529133 B1 EP1529133 B1 EP 1529133B1
Authority
EP
European Patent Office
Prior art keywords
microparticle system
paper stock
cationic
paper
pulp
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.)
Revoked
Application number
EP03784048A
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German (de)
English (en)
French (fr)
Other versions
EP1529133A1 (de
Inventor
Rainer Blum
Ralf Hemel
Norbert Mahr
Rudolf Lorz
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BASF SE
Original Assignee
BASF SE
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Publication date
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Priority claimed from DE2002136252 external-priority patent/DE10236252B4/de
Application filed by BASF SE filed Critical BASF SE
Publication of EP1529133A1 publication Critical patent/EP1529133A1/de
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Anticipated expiration legal-status Critical
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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
    • D21H23/02—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
    • D21H23/06—Controlling the addition
    • D21H23/14—Controlling the addition by selecting point of addition or time of contact between components
    • D21H23/18—Addition at a location where shear forces are avoided before sheet-forming, e.g. after pulp beating or refining
    • 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
    • D21H17/20—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
    • 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
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
    • 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
    • D21H21/10—Retention agents or drainage improvers

Definitions

  • the invention relates to a process for the production of paper, paperboard and cardboard by shearing the pulp, adding a microparticle system of a cationic polymer and a finely divided inorganic component to the pulp after the last shear stage in front of the headbox, draining the stock under sheet formation and drying the sheets.
  • EP-A-0 223 223 is a method for the production of paper and cardboard by dehydration of a paper material known, wherein first added to a paper stock with a concentration of 2.5 to 5 wt .-% bentonite, then diluted the paper stock, a highly cationic polymer with a charge density of min 4 meq / g is added and finally a high molecular weight polymer based on acrylamide is added and the resulting pulp is dewatered after thorough mixing.
  • an essentially linear synthetic cationic polymer having a molecular weight of more than 500,000 in an amount of more than 0.03% by weight, based on dry paper stock, of an aqueous pulp suspension is first metered into the mixture then the action of a shear field, wherein the first formed flakes are cut into microflakes carrying a cationic charge, then dosed bentonite and dewatered the pulp thus obtained without further action of shear forces.
  • EP-A-0 335 575 describes a papermaking process in which the pulp is successively admixed with 2 different water-soluble cationic polymers, subsequently subjected to at least one shear stage and then flocculated by the addition of bentonite.
  • EP-A-0 885 328 describes a process for the production of paper, wherein initially dosed to an aqueous pulp suspension, a cationic polymer, the mixture then subjected to the action of a shear field, then adding an activated bentonite dispersion and dewatering the resulting pulp.
  • EP-A-0 910 701 describes a process for the production of paper and cardboard, wherein the paper pulp successively added a low molecular weight or medium molecular weight cationic polymer based on polyethyleneimine or polyvinylamine and then with a high molecular weight cationic polymer such as polyacrylamide, polyvinylamine or cationic starch. After this pulp has been subjected to at least one shear stage, it is flocculated by addition of bentonite and the pulp is dewatered.
  • WO-A-01/34910 there is described a process for producing paper in which a polysaccharide or a synthetic, high molecular weight polymer is metered into the pulp suspension. Subsequently, a mechanical shear of the pulp must take place.
  • the reflocculation is carried out by dosing an inorganic component such as silica, bentonite or clay and a water-soluble polymer.
  • From the US-A-6,103,065 discloses a method of improving the retention and dewatering of paper stocks by adding a cationic polymer having a molecular weight of 100,000 to 2 million and a charge density of more than 4.0 meq./g to a pulp after the last shearing, simultaneously or thereafter adding a polymer having a molecular weight of at least 2 million and a charge density of less than 4.0 meq./g and then metering in bentonite. It is not necessary with this method subject the stock to shear after addition of the polymers. After addition of the polymers and the bentonite, the pulp can be dewatered without further action of shearing forces.
  • the present invention has for its object to provide a further method for the production of paper using a microparticle system, which requires in comparison to the known processes lower amounts of polymers and bentonite, at the same time achieves improved retention and drainage and obtains papers that are less prone to yellowing.
  • the object is achieved by a method for producing paper, cardboard and cardboard by shearing the pulp, adding a microparticle system of a cationic polymer and a finely divided inorganic component to the pulp after the last shear stage before the headbox, draining the stock under sheet formation and drying the leaves, if as cationic polymers of the microparticle system cationic polyacrylamides, vinylamine units containing polymers and / or polydiallyldimethylammonium chloride having an average molecular weight Mw of at least 500 000 daltons and a charge density of not more than 4.0 meq./g used, wherein the retention agent used microparticle system is free of polymers with a charge density of more than 4 meq./g.
  • all paper grades can be produced, for example cardboard, single / multilayer carton, single / multi-layer liners, corrugating medium, papers for newspaper printing, so-called medium-fine writing and printing papers, natural gravure papers and lightweight base papers.
  • TMP thermo-mechanical pulp
  • CMP chemo-thermo-mechanical fabric
  • PGW pressure ground
  • wood pulp and sulfite and sulfate pulp emanate.
  • the pulps can be short fiber as well as long fiber.
  • wood-free grades produced by the process according to the invention which yield high-white paper products.
  • the papers may optionally contain up to 40 wt .-%, usually 5 to 35 wt .-% fillers.
  • Suitable fillers are e.g. Titanium dioxide, natural and pre-painted chalk, talc, kaolin, satin white, calcium sulfate, barium sulfate, clay or alumina.
  • the microparticle system according to the invention consists of a cationic polymer and a finely divided anionic component.
  • Suitable cationic polymers are cationic polyacrylamides, polymers containing vinylamine units, polydiallyldimethylammonium chlorides or mixtures thereof having an average molecular weight Mw of at least 500,000 daltons and a charge density of not more than 4.0 meq./g in each case.
  • cationic polyacrylamides having an average molecular weight Mw of at least 5 million daltons and a charge density of 0.1 to 3.5 meq./g and polyvinylamines obtainable by hydrolysis of vinylformamide units containing polymers, the degree of hydrolysis of the vinylformamide units being 20 to 100 mol% and the average molecular weight of the polyvinylamine is at least 2 million daltons.
  • the polyvinylamines are preferably prepared by hydrolysis of homopolymers of vinylformamide, the degree of hydrolysis being, for example, 70 to 95%.
  • Cationic polyacrylamides are, for example, copolymers prepared by copolymerizing acrylamide and at least one di-C 1 -bisC 2 -alkylamino-C 2 -bisC 4 -alkyl (meth) acrylate or a basic acrylamide in the form of the free bases, the salts with organic or inorganic acids or the alkyl halides quaternized compounds are available.
  • Examples of such compounds are dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl acrylate, diethylaminoethyloacrylyl, dimethylaminopropyl methacrylate, dimethylaminopropyl acrylate, diethylaminopropyl methacrylate, diethylaminopropyl acrylate and / or dimethylaminoethylacrylamide.
  • Further examples of polymers containing cationic polyacrylamides and vinylamine units may be the references cited in the prior art, such as EP-A-0 910 701 and US-A-6,103,065 be removed.
  • Such polymers are commercial products.
  • Branched polymers which can be prepared, for example, by copolymerization of acrylamide or methacrylamide with at least one cationic monomer in the presence of small amounts of crosslinking agents are described, for example, in the prior art references US Patent No. 5,393,381 .
  • WO-A-99/66130 and WO-A-99/63159 described.
  • Suitable cationic polymers are polydiallyldimethylammonium chlorides (PolyDADMAC) with an average molecular weight of at least 500,000 daltons, preferably at least 1 million daltons. Polymers of this type are commercial products.
  • the cationic polymers of the microparticle system are added to the stock in an amount of 0.005 to 0.5% by weight, preferably in an amount of 0.01 to 0.2% by weight.
  • Suitable inorganic components of the microparticle system are, for example, bentonite, colloidal silicic acid, silicates and / or calcium carbonate.
  • Colloidal silicic acid is to be understood as meaning products based on silicates, for example silica microgel, silical sol, polysilicates, aluminum silicates, boron silicates, polyborosilicates, clay or zeolites.
  • Calcium carbonate can be used, for example, in the form of chalk, ground calcium carbonate or precipitated calcium carbonate as the inorganic component of the microparticle system.
  • Bentonite is generally understood to be phyllosilicates which are swellable in water.
  • clay mineral montmorillonite and similar clay minerals such as nontronite, hectorite, saponite, sauconite, beidellite, allevardite, illite, halloysite, attapulgite and sepiolite.
  • These phyllosilicates are preferably activated before use, ie converted into a water-swellable form in which the phyllosilicates are treated with an aqueous base such as aqueous solutions of sodium hydroxide solution, potassium hydroxide solution, soda or potash. Bentonite in the form treated with sodium hydroxide solution is preferably used as the inorganic component of the microparticle system.
  • the platelet diameter of the water-dispersed bentonite in the sodium hydroxide-treated mold is, for example, 1 to 2 ⁇ m, and the thickness of the platelets is about 1 nm.
  • the bentonite has a specific surface area of 60 to 800 m 2 / g.
  • Typical bentonites are used in the EP-B-0235893 described.
  • bentonite is added to the cellulosic suspension, typically in the form of an aqueous bentonite slurry. This bentonite slurry may contain up to 10% by weight of bentonite. Normally, the slurries contain about 3 to 5 wt .-% bentonite.
  • colloidal silica products from the group of silicon-based particles, silica microgels, silica sols, aluminum silicates, borosilicates, polyborosilicates or zeolites can be used. These have a specific surface of 50-1000 m 2 / g and an average particle size distribution of 1-250 nm, normally in the range 40-100 nm.
  • the preparation of such components is described, for example, in US Pat EP-A-0041056 . EP-A-0185068 and US-A-5176891 described.
  • Clay or kaolin is a hydrous aluminum silicate with a platelet-like structure.
  • the crystals have a layer structure and an aspect ratio (diameter to thickness ratio) of up to 30: 1.
  • the particle size is at least 50% less than 2 microns.
  • carbonates preferably calcium carbonate, natural calcium carbonate (ground calcium carbonate, GCC) or precipitated calcium carbonate (PCC) can be used.
  • GCC is produced by grinding and visual processes using grinding aids. It has a particle size of 40 - 95% less than 2 microns, the specific surface area is in the range of 6 - 13 m 2 / g.
  • PCC is made by passing carbon dioxide into calcium hydroxide solution. The average particle size is in the range of 0.03 - 0.6 microns, the specific surface area can be greatly influenced by the choice of precipitation conditions. It is in the range of 6 - 13 m 2 / g.
  • the inorganic component of the microparticle system is added to the stock in an amount of 0.01 to 1.0% by weight, preferably in an amount of 0.1 to 0.5% by weight.
  • the consistency of the pulp is for example 1 to 100 g / l, preferably 4 to 30 g / l.
  • the aqueous fiber slurry is subjected to at least one shear stage. It goes through at least one cleaning, mixing and / or pumping stage.
  • the shearing of the pulp can be done for example in a pulper, classifier or in a refiner.
  • the microparticle system is metered. Particularly preferred is a procedure in which first dosed the cationic polymer and then the inorganic component of the microparticle system to the pulp, which was previously sheared.
  • the process chemicals usually used in papermaking in the usual amounts, e.g. Fixing agents, dry and wet strength agents, engine sizes, biocides and / or dyes.
  • the first pass retention was determined by determining the ratio of the solids content in the white water to the solids content in the headbox. The information is given in percent.
  • FPA retention (first-pass ash retention) was determined analogously to FP retention, but only the ash content was considered.
  • a paper pulp made from a wood-free, bleached pulp having a pulp density of 7 g / l and a filler content of 30% calcium carbonate was processed on a Fourdrinier machine with hybrid former to a paper with writing and printing quality.
  • the following arrangement of mixing and shearing devices was used: mixing vessel, dilution to 7 g / l, mixing pump, cleaner, headbox pump, screen and headbox. 32 tons of paper were produced per hour.
  • the example was repeated with the exceptions that dosed 410 g / t of the cationic polyacrylamide before screen and pump and 3000 g / t bentonite after screen before the headbox. These quantities were required to achieve an equally good formation as in the example.
  • the FP retention was 79.9%, the FPA retention 59.1%.
  • Wood pulp and wood pulp having a pulp consistency of 7 g / l and a filler content of 30% of a mixture of clay and calcium carbonate (1: 1) was processed on a paper machine with a gap former into a LWC grade paper.
  • the following arrangement of mixing and shearing devices was used: mixing vessel, dilution, deculator, pump, screen, headbox. 30 tons of paper were produced per hour.
  • Example 2 was repeated with the exceptions that 280 g / t of the cationic polyacrylamide before the pump and the screen and 1400 g / t bentonite after the screen before the headbox dosed. This amount was required to achieve equally good retention.
  • the FP retention was 69%, the FPA retention 40%.
  • Example 2 As a comparison of the results of Example 2 with the results of Comparative Example 2 shows, the savings in polymer was about 30%. Although in Example 2, a smaller amount of retention agent was used as in Comparative Example 2, in Example 2 an equally good formation and paper properties could be achieved.

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EP03784048A 2002-08-07 2003-07-23 Verfahren zur herstellung von papier, pappe und karton Revoked EP1529133B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2002136252 DE10236252B4 (de) 2002-08-07 2002-08-07 Verfahren zur Herstellung von Papier, Pappe und Karton
DE10236252 2002-08-07
PCT/EP2003/008037 WO2004015200A1 (de) 2002-08-07 2003-07-23 Verfahren zur herstellung von papier, pappe und karton

Publications (2)

Publication Number Publication Date
EP1529133A1 EP1529133A1 (de) 2005-05-11
EP1529133B1 true EP1529133B1 (de) 2012-02-22

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ID=7714828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03784048A Revoked EP1529133B1 (de) 2002-08-07 2003-07-23 Verfahren zur herstellung von papier, pappe und karton

Country Status (12)

Country Link
US (1) US7306701B2 (es)
EP (1) EP1529133B1 (es)
JP (1) JP4518492B2 (es)
CN (1) CN1291104C (es)
AT (1) ATE546587T1 (es)
AU (1) AU2003250139A1 (es)
BR (1) BR0313051A (es)
CA (1) CA2494648C (es)
DE (1) DE20220979U1 (es)
ES (1) ES2380321T3 (es)
PT (1) PT1529133E (es)
WO (1) WO2004015200A1 (es)

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US8790493B2 (en) 2004-12-22 2014-07-29 Akzo Nobel N.V. Process for the production of paper
US8888957B2 (en) 2005-12-30 2014-11-18 Akzo Nobel N.V. Process for the production of paper
US9139958B2 (en) 2005-05-16 2015-09-22 Akzo Nobel N.V. Process for the production of paper

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JP6179466B2 (ja) 2014-06-20 2017-08-16 王子ホールディングス株式会社 ガラス合紙
JP6767388B2 (ja) 2015-05-01 2020-10-14 イェーナヴァルヴ テクノロジー インコーポレイテッド 心臓弁置換におけるペースメーカー割合を低減させるデバイス及び方法
CN106868913B (zh) * 2017-03-30 2020-11-17 山鹰国际控股股份公司 二元阳离子助留体系的助滤方法
JP2017218721A (ja) * 2017-09-27 2017-12-14 王子ホールディングス株式会社 段ボール原紙の製造方法
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US6379501B1 (en) * 1999-12-14 2002-04-30 Hercules Incorporated Cellulose products and processes for preparing the same
MY140287A (en) * 2000-10-16 2009-12-31 Ciba Spec Chem Water Treat Ltd Manufacture of paper and paperboard

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8790493B2 (en) 2004-12-22 2014-07-29 Akzo Nobel N.V. Process for the production of paper
US9562327B2 (en) 2004-12-22 2017-02-07 Akzo Nobel N.V. Process for the production of paper
US9139958B2 (en) 2005-05-16 2015-09-22 Akzo Nobel N.V. Process for the production of paper
US8888957B2 (en) 2005-12-30 2014-11-18 Akzo Nobel N.V. Process for the production of paper

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JP2005534824A (ja) 2005-11-17
ES2380321T3 (es) 2012-05-10
CA2494648C (en) 2011-10-04
CN1291104C (zh) 2006-12-20
CN1675432A (zh) 2005-09-28
PT1529133E (pt) 2012-03-30
DE20220979U1 (de) 2004-10-14
ATE546587T1 (de) 2012-03-15
US20050247420A1 (en) 2005-11-10
BR0313051A (pt) 2005-06-14
EP1529133A1 (de) 2005-05-11
JP4518492B2 (ja) 2010-08-04
AU2003250139A1 (en) 2004-02-25
CA2494648A1 (en) 2004-02-19
WO2004015200A1 (de) 2004-02-19
US7306701B2 (en) 2007-12-11

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