EP1994222A1 - Procede ameliore de fabrication de papier et de carton - Google Patents

Procede ameliore de fabrication de papier et de carton

Info

Publication number
EP1994222A1
EP1994222A1 EP07726292A EP07726292A EP1994222A1 EP 1994222 A1 EP1994222 A1 EP 1994222A1 EP 07726292 A EP07726292 A EP 07726292A EP 07726292 A EP07726292 A EP 07726292A EP 1994222 A1 EP1994222 A1 EP 1994222A1
Authority
EP
European Patent Office
Prior art keywords
process according
cationic
sulphonic
sulphonic acid
fibre
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Withdrawn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
EP07726292A
Other languages
German (de)
English (en)
Inventor
John Stuart Cowman
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.)
Clariant Finance BVI Ltd
Original Assignee
Clariant International Ltd
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 Clariant International Ltd filed Critical Clariant International Ltd
Priority to EP07726292A priority Critical patent/EP1994222A1/fr
Publication of EP1994222A1 publication Critical patent/EP1994222A1/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Withdrawn legal-status Critical Current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
    • 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
    • D21H23/08—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH
    • D21H23/10—Controlling the addition by measuring pulp properties, e.g. zeta potential, pH at least two kinds of compounds being added
    • 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
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/47—Condensation polymers of aldehydes or ketones
    • D21H17/48—Condensation polymers of aldehydes or ketones with phenols
    • 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
    • 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
    • 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
    • D21H21/28—Colorants ; Pigments or opacifying 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
    • 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
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching

Definitions

  • the instant invention relates to a process for the manufacture of paper or board in which the anionic charge at the fibre surface is artificially increased, providing more sites and enhancing the adsorption of cationic papermaking additives.
  • Cellulose a naturally occurring polymer derived from trees and processed to yield a raw material for papermaking, contains both hydroxyl -OH and carboxyl -COOH groups. The latter is the result of oxidation and subsequent reduction in molecular weight during delignification and bleaching. As a result, the zeta potential of virgin cellulosic fibres is always negative or anionic. Case 2006CH003 2
  • Zeta potential is a representation of surface charge and is normally evaluated by taking an aqueous suspension of cellulosic fibres, forming a fibre plug on a metallic screen electrode and allowing a flow of water to pass through the plug. A potential difference (known as the streaming potential) between the screen and a second ring electrode, a short distance away, is measured and, from this value, the zeta potential is automatically calculated. Instruments, which record the zeta potential of fibre surfaces, are available from several manufacturers.
  • Cellulosic fibre for the purposes of papermakmg, is available in a range of qualities ranging from fully bleached, with almost all the lignin and non-cellulosic components removed, to varieties of post-consumer brown wastepaper.
  • the virgin fibre in unbleached pulps contains more than 50% of lignins, wood resins and other non-cellulosic contaminants, leading to a reduction in carboxyl groups and associated anionic charge at the fibre surface.
  • contaminants are partially removed and re-deposited on the fibre surface, reducing even further the number of available anionic carboxyl groups After 5 or 6 recycling sequences, contaminants can cover as much as 90% of the fibre surface.
  • zeta potential of an aqueous fibre slurry is influenced by the level of conductivity in the water phase.
  • the surface of a negatively charged cellulosic fibre has a fixed layer of oppositely charged cations (often referred to as the Stern layer) and a diffuse layer of counter ions on top of the fixed layer.
  • This concept has become known as the electrical double layer theory.
  • the layer of cations As the fibre moves in water, the layer of cations (Stern layer) is carried with it.
  • the ions m the diffuse layer do not move with the fibre.
  • the boundary between the Stern layer and the diffuse layer is known as the slip plane
  • the slip plane will be relatively far from the surface of the fibre but as conductivity is increased, more ions are introduced into the diffuse layer. As a result, the double layer is compressed and more cations are forced into the Stern layer, reducing the anionic charge on the fibre.
  • OCC Old Corrugated Containers (brown wastepaper)
  • ONP Old Newspapers
  • cationic additives which rely on ionic interaction with the cellulosic fibre surface for their affinity to the substrate, is proportional to the level of conductivity in the water phase of the papermaking system. There is, therefore, a requirement for compounds, that can increase the anionicity of the surface charge (zeta potential), especially under conditions of high conductivity, and provide more ionic bonding sites for cationic papermaking additives.
  • stilbene-based optical brightening agents also have strong affinity for cellulosic fibres, even though their solubilising groups are usually sulphonic Case 2006CH003 4
  • the cellulosic fibres, OBAs and dyestuffs each have a charge density, normally recorded as milhequivalents per gram of substance (mequiv/g).
  • a typical range of values for cellulosic fibres would be within the range 0.005 to 0 5 mequiv/g.
  • Dyestuffs and OBAs have a higher charge density than the average value for cellulose (usually in the range 0.5 to 1.5 mequiv/g) and, when adsorbed on the fibre surface, these additives increase the zeta potential of the cellulose. In other words, the cellulosic fibre surface charge becomes more negative
  • OCC Old Corrugated Containers (brown wastepaper)
  • ONP Old Newspapers
  • Dyestuff Direct Yellow 11 (30% active liquid)
  • acid soaps, carboxymethyl cellulose and anionic starch have no value as pre-treatments in the present invention.
  • an object of the instant invention is a process for making paper or paper board comprising • in a first step the addition to an aqueous suspension of cellulosic fibres of a substantive water soluble anionic compound (1), which adsorbs on the fibre surface and increases the negative surface charge of the fibre, recorded by means of zeta potential measurements, and
  • a cationic papermaking additive (2) selected from a retention or drainage aid, a wet or dry strength polymer, a cationic fixative, a softener or debonder, a cationic sizing chemical
  • the process for making paper or paper board according to the invention comprises, continuously forming an aqueous cellulosic fibre suspension, to which is added a substantive water soluble anionic compound (1), followed by one or more water soluble cationic additive (2) and optionally an inorganic coagulant, draining the suspension on a screen to form a wet sheet and drying the sheet.
  • a substantive water soluble anionic compound (1) followed by one or more water soluble cationic additive (2) and optionally an inorganic coagulant
  • draining the suspension on a screen to form a wet sheet and drying the sheet.
  • the substantive water soluble anionic compound (1) is characterized in that it increases the negative surface charge on the cellulosic fibres within the suspension, providing additional anchor points for water soluble cationic additives (2).
  • the adsorption potential and hence the performance of water soluble cationic additives (2) is improved.
  • the water soluble cationic additives (2) provide higher retention values and/or faster drainage speeds for the cellulosic fibrous suspension, and/or higher wet and/or dry strength values of the dried paper sheet.
  • Cationic additives are widely used in the paper industry and may be applied to control the papermaking process and/or to add functionality to the paper sheet.
  • Cellulosic fibre retention and water removal are two important process variables, controlled by retention and drainage aids, respectively, polymeric additives, which are mostly cationic in nature and derived from acrylamide-dialkylammoalkyl methacrylic or acrylic ester copolymers.
  • Diallyldimethylammonium chloride (DADMAC) is also a popular monomer and is available, both as a homopolymer and in polymer combinations with other monomers.
  • Cationic dry strength additives are based on either natural or synthetic polymers. Starch and guar may be cationised in a reaction involving epoxypropyl-trimethylammonium chloride. Synthetic additives for dry strength are numerous but include products based on polyvmylamine, polyamine, polyamide and glyoxylated polyacrylamide chemistry. Wet strength additives are predominantly polyamideamme or polyallylamme chemistry, further reacted with epichlorohydrin.
  • Cationic fixatives are generally polymers with a high charge density and include polyamine (reaction products of aliphatic amines with epichlorohydrin), poly- DADMAC, polyvinylamme and acrylamide-dialkylammoalkyl methacrylic or acrylic ester chemistries.
  • Softener and debonder chemistry is generally non-polymeric and based on cationic quaternary ammonium derivatives of fatty amines (often alkoxylated), fatty acid esters or imidazole compounds Case 2006CH003 8
  • the substantive water soluble anionic compound (1) is a phenolic polymer, which has strong affinity for cellulosic fibres, especially cellulosic fibres that have not been fully bleached and are brown in colour due to residual ligmn.
  • the substantive water soluble anionic compound (1) is a phenolic polymer, consisting of recurring units of the formula
  • Preferred P as a constituent of the phenolic polymer, is phenol, phenol sulphonic or carboxylic acid, cresol, cresol sulphonic or carboxylic acid, dihydroxy diphenyl sulphone, dihydroxy diphenyl sulphone sulphonic or carboxylic acid, naphthol sulphonic or carboxylic acid and Q is P or naphthalene sulphonic acid, xylene sulphonic acid, cumene sulphonic acid, cresol sulphonic acid or benzene sulphonic acid.
  • the sulphonic or carboxylic acid groups are present in the form of sodium, potassium, lithium, ammonium, ammo or hydroxyalkylammo salts.
  • the molecular weight of the phenolic polymer generally is between 2'00O and 30O00 Daltons, preferably between 10'0OO and 30O00 Daltons.
  • the substantive water soluble anionic compound (1) is a dyestuff, which has strong affinity for cellulosic fibres. Preferably it is Direct Yellow 11.
  • the substantive water soluble anionic compound (1) is a dyestuff based on stilbene sulphonic acid chemistry.
  • the substantive water soluble anionic compound (1) is by preference an optical brightening agent. More preferred, the substantive water soluble anionic compound (1) is a an optical brightening agent based Case 2006CH003 9
  • the substantive water soluble anionic compound (1) is an optical brightening agent based on stilbene sulphonic acids, containing 2, 4, 6 or more sulphonic acid groups, optionally neutralised with any alkaline compounds, but preferably with sodium, potassium or lithium hydroxides.
  • the water soluble cationic additives (2) display improved performance in papermaking systems where the level of conductivity in the water circuits is greater than 1000 micro Siemens, and especially where the conductivity is greater than 2500 micro Siemens.
  • the cellulosic fibres are derived from bleached, semi-bleached or unbleached wood pulp, deinked pulp or waste paper.
  • the amount of substantive water soluble anionic compound (1), added to the cellulosic fibre suspension prior to any cationic additive (2), is 0.001 to 10%, more preferably 0.01 to 2% of dry compound, based on the dry weight of cellulosic fibres.
  • the amount of cationic papermaking additive (2) is 0.01 to 2% of dry compound, based on the dry weight of cellulosic fibres.
  • a 1% slurry of cellulosic fibres was sampled in a paper mill, during the manufacture of test liner from old corrugated container wastepaper. The sample was removed at a point, before the addition of the retention aid, which in this case was a high molecular weight cationic polyacrylamide powder (cationic monomer content amounts to 10% molar)
  • the water circuits in this mill were classed as relatively closed, with a fresh water usage of 3 m per tonne of paper. With such a low fresh water consumption, dissolved and colloidal substances had increased the conductivity to around 4000 ⁇ S/cm.
  • Example 5 Cationic polymeric wet strength agents are in common use in the paper industry Large volumes of resm are often required to achieve the desired level of wet strength m the paper sheet and when the zeta potential of the cellulosic fibre is too low to accept such high addition levels, excess polymer remains in the water phase and the wet strength of the sheet is disappointingly low.
  • This example demonstrates how a pre-treatment of a substantive anionic compound increases the zeta potential of the cellulosic fibre and the amount of adsorbed cationic wet strength polymer, leading to higher values of wet strength m the paper sheet.
  • Old corrugated containers were re-pulped in tap water at 4% consistency and refined to a value of 40 0 SR (Schopper Riegler). This pulp was then diluted with tap water to 1 % consistency and the conductivity adjusted to 1000 ⁇ S/cm with sodium sulphate. The pH was measured at 6.8 The pulp was used to make 2 g (equivalent to 100 gsm) hand sheets with the British Standard Sheet Forming Apparatus.
  • the Burst Index Burst result
  • the Tensile Index Tensile result

Landscapes

  • Paper (AREA)

Abstract

La présente invention concerne un procédé de fabrication de papier et de carton selon lequel la charge anionique à la surface des fibres est augmentée artificiellement en ajoutant un composé anionique sensiblement soluble dans l'eau, permettant ainsi d'obtenir plus de sites et de favoriser l'adsorption des additifs cationiques utilisés lors de la fabrication du papier. Le composé anionique préféré est un polymère phénolique.
EP07726292A 2006-02-20 2007-02-02 Procede ameliore de fabrication de papier et de carton Withdrawn EP1994222A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07726292A EP1994222A1 (fr) 2006-02-20 2007-02-02 Procede ameliore de fabrication de papier et de carton

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06003353 2006-02-20
PCT/EP2007/051015 WO2007096242A1 (fr) 2006-02-20 2007-02-02 Procede ameliore de fabrication de papier et de carton
EP07726292A EP1994222A1 (fr) 2006-02-20 2007-02-02 Procede ameliore de fabrication de papier et de carton

Publications (1)

Publication Number Publication Date
EP1994222A1 true EP1994222A1 (fr) 2008-11-26

Family

ID=36676511

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07726292A Withdrawn EP1994222A1 (fr) 2006-02-20 2007-02-02 Procede ameliore de fabrication de papier et de carton

Country Status (5)

Country Link
US (1) US20090025895A1 (fr)
EP (1) EP1994222A1 (fr)
AR (1) AR059584A1 (fr)
TW (1) TW200801061A (fr)
WO (1) WO2007096242A1 (fr)

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US20040260034A1 (en) * 2003-06-19 2004-12-23 Haile William Alston Water-dispersible fibers and fibrous articles
US20110139386A1 (en) * 2003-06-19 2011-06-16 Eastman Chemical Company Wet lap composition and related processes
US7892993B2 (en) * 2003-06-19 2011-02-22 Eastman Chemical Company Water-dispersible and multicomponent fibers from sulfopolyesters
US8513147B2 (en) 2003-06-19 2013-08-20 Eastman Chemical Company Nonwovens produced from multicomponent fibers
US8088250B2 (en) 2008-11-26 2012-01-03 Nalco Company Method of increasing filler content in papermaking
PT103998B (pt) * 2008-03-20 2011-03-10 Univ Nova De Lisboa Dispositivos electrónicos e optoelectrónicos de efeito de campo compreendendo camadas de fibras naturais, sintéticas ou mistas e respectivo processo de fabrico
PT103999B (pt) * 2008-03-20 2012-11-16 Univ Nova De Lisboa Processo de utilização e criação de papel à base de fibras celulósicas naturais, fibras sintéticas ou mistas como suporte físico e meio armazenador de cargas elétricas em transístores de efeito de campo com memória autossustentáveis usando óxidos sem
US8512519B2 (en) 2009-04-24 2013-08-20 Eastman Chemical Company Sulfopolyesters for paper strength and process
US8980059B2 (en) * 2009-08-12 2015-03-17 Nanopaper, Llc High strength paper
FI123289B (fi) * 2009-11-24 2013-01-31 Upm Kymmene Corp Menetelmä nanofibrilloidun selluloosamassan valmistamiseksi ja massan käyttö paperinvalmistuksessa tai nanofibrilloiduissa selluloosakomposiiteissa
US9273417B2 (en) 2010-10-21 2016-03-01 Eastman Chemical Company Wet-Laid process to produce a bound nonwoven article
US8840757B2 (en) 2012-01-31 2014-09-23 Eastman Chemical Company Processes to produce short cut microfibers
US9617685B2 (en) 2013-04-19 2017-04-11 Eastman Chemical Company Process for making paper and nonwoven articles comprising synthetic microfiber binders
US9598802B2 (en) 2013-12-17 2017-03-21 Eastman Chemical Company Ultrafiltration process for producing a sulfopolyester concentrate
US9605126B2 (en) 2013-12-17 2017-03-28 Eastman Chemical Company Ultrafiltration process for the recovery of concentrated sulfopolyester dispersion
US9567708B2 (en) * 2014-01-16 2017-02-14 Ecolab Usa Inc. Wet end chemicals for dry end strength in paper
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CN106245395A (zh) * 2016-08-26 2016-12-21 江苏理文造纸有限公司 一种环保牛皮箱板纸的制浆工艺

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Also Published As

Publication number Publication date
TW200801061A (en) 2008-01-01
WO2007096242A1 (fr) 2007-08-30
US20090025895A1 (en) 2009-01-29
AR059584A1 (es) 2008-04-16

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