WO1992020862A1 - Production de papier et produits en papier - Google Patents

Production de papier et produits en papier Download PDF

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Publication number
WO1992020862A1
WO1992020862A1 PCT/US1992/004091 US9204091W WO9220862A1 WO 1992020862 A1 WO1992020862 A1 WO 1992020862A1 US 9204091 W US9204091 W US 9204091W WO 9220862 A1 WO9220862 A1 WO 9220862A1
Authority
WO
WIPO (PCT)
Prior art keywords
polymer
process according
paper
furnish
starch
Prior art date
Application number
PCT/US1992/004091
Other languages
English (en)
Inventor
Stephen Peats
Harris J. Bixler
Original Assignee
Delta Chemicals, Inc.
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 Delta Chemicals, Inc. filed Critical Delta Chemicals, Inc.
Priority to AU20081/92A priority Critical patent/AU650404B2/en
Priority to JP5500213A priority patent/JPH06508185A/ja
Priority to BR9206006A priority patent/BR9206006A/pt
Publication of WO1992020862A1 publication Critical patent/WO1992020862A1/fr
Priority to FI935069A priority patent/FI935069A/fi
Priority to NO934157A priority patent/NO934157L/no

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
    • 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
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D21H17/29—Starch cationic
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • 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
    • 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

Definitions

  • This disclosure relates to methods for increasing retention, drainage, formation and other qualities during the production of paper from pulp slurries.
  • the derivatized polyacryl- amide used may be cationic or anionic in nature.
  • the higher the molecular weight of the material used the greater has been the retention.
  • sheet formation decreases. The same is true for increasing the amount of polyacrylamide used, namely retention increases, but sheet formation suffers.
  • Booth (U.S. Patent 2,368,635) was the first to utilize bentonite as a retention aid, proposing that the bentonite acted as both a coagulant of finely divided particles and an absorber of contaminating substances.
  • Pye (U.S. Patent 3,052,595) utilized a combination of bentonite and anionic or neutral polyacrylamide to achieve much lower turbidity in the white water of a laboratory scale paper making device.
  • the preferred method of addition was to add the bentonite prior to the polyacrylamide.
  • Auhorn Woodblatt Fur Textilmaschinefabrikation (1979) 13,493-502
  • bentonite as an additive, prior to the addition of polyethylenei ine, to reduce the amount of oxidizable substances in the paper and also to increase the effect of the polyethyleneimine that was subsequently added to the paper making stock.
  • Auhorn in later work Wet End Paper Technology Symposium (1981) March, Kunststoff) , enlarged on his earlier work to include both polyethyleneimine and polyacrylamide. The conclusions on a lab scale were similar to the earlier work, although these improvements were never fully realized on a paper making machine trial.
  • Langley and Litchfield (U.S. Patent 4,305,781) proposed a similar system utilizing a bentonite clay and a largely non-ionic, high molecular weight polymer to be used on cellulosic suspensions substantially free of filler. It is suggested that the bentonite is added to thick stock, to the hydropulper or to the re-circulating white-water. The polymer is ideally added after the last point of high shear, typically after the centri-screens and just before the head-box. Bentonite-polymer systems were not and are not the only example of what are known as "multi-component or microparticulate retention systems.”
  • Anderson in W086/05826 describes modification of the surface of silica with aluminum ions to produce a colloidal silica particle that maintained its efficiency over the whole pH range utilized by paper makers, namely pH 4-8.
  • This aluminum modified silicic acid solution was used in combination with a cationic polyacrylamide. Many examples of drainage and retention improvements are given using standard laboratory practices. In all examples given, the polymer was added prior to the aluminum modified silicic acid solution.
  • Patent 0017353 and by Pye both suffer from the same defect, namely, over flocculation of the sheet.
  • Lorz outlines a method of adding "bentonite" to the thick stock (consistency 2.5 to 5.0% by weight), followed by agitation and dilution to a thin stock
  • Langley (Tappi (1986) Paper makers Conference) outlined another system utilizing a combination of bentonite and polyacrylamide, where an excess of high molecular weight linear synthetic cationic polymer is added to an aqueous cellulosic suspension before shearing the suspension, and adding bentonite after shearing and then draining the purified suspension.
  • This system is an expensive system because (1) five times as much high molecular weight polymer was used in comparison with conventional polymeric retention aid use levels, and (2) there was the additional expense of the bentonite.
  • European application 0 373 306 discloses a retention aid composition
  • a retention aid composition comprising a water dispersible colloidal siliceous material in intimate association with a low molecular weight, water soluble, high charge density organic polymer, such as a polyacrylic acid or a polyamine, the ionicity of the siliceous material being significantly modified by the charge on the polymer.
  • the composition is produced by reacting the siliceous material and the organic polymer in an aqueous phase system.
  • the composition is said to be suitable for use as a retention/drainage agent in paper production, preferably after the addition of a conventional high molecular wieght flocculating agent.
  • the present invention utilizes colloidal metal silicate materials that are synthetic (i.e., not naturally occurring) and largely amorphous.
  • the synthetic route allows the control of the properties of the product so as to maximize its effectiveness.
  • amorphous metal silicates materials can be produced in a pure form, free of extraneous or contaminating material, and can be produced as a white free-flowing powder. These materials form extremely small particles when fully dispersed in water and, once dispersed, form a clear colloidal dispersion of anionic particles. The magnitude of this anionic charge is largely independent of pH in the range 4-9.
  • Colloidal silicic acid preferred in similar applications can only be made as a 15% dispersion. It can never be made dry, and has an anionic charge that is pH dependent. Bentonites in the dry form are brown to tan in color and form dispersions that are opaque and light brown to tan in color. This color reduces the brightness of the paper produced when bentonite is used.
  • Improved production of paper and paper proucts is achieved in accordance with the present invention by adding a cationic polymer and the amorphous metal silicate separately to the furnish with sufficient mixing between additions.
  • the order of addition of these components is not critical, although addition of the polymer prior to the last high shear element and subsequent addition of the amorphous metal silicate before feeding the resultant mixture to a headbox of a paper making machine, without subjecting such mixture to any further substantial shear, is the preferred method.
  • This combination of ingredients has several advantages, including providing improved retention, drainage and formation while minimizing the amount of polymer and amorphous metal silicate necessary, resulting in reduction of the total cost of the binder composition.
  • metal silicates In crystalline metal silicates, metal ions and silicate ions of uniform size and shape are arranged in a regular manner in a solid lattice. However, most solutions of soluble silicates do not contain silicate ions of uniform size, but, instead, a mixture of polysilicate ions. Thus, when polysili ⁇ ate ions combine with metal ions, the resulting insoluble precipitate is almost always amorphous. In contrast, naturally-occurring silicates are almost always crystalline and highly- structured in nature due to the conditions under which they are formed.
  • amorphous metal silicates In order for amorphous metal silicates to possess a cation exchange capacity, or anionic charge, it is necessary for a minor portion of the predominant metal cation to be substituted by a cation of lower valency. For example, this can be conveniently achieved by substituting Mg 2+ for the predominant Al 3+ , or Li + for the predominant Mg 2+ .
  • This charge deficiency is balanced by a cation outside, but associated with, the amorpohous structure, and is referred to as an exchangeable ion which in turn gives rise to the cation exchange capacity.
  • amorphous metal silicates In synthesizing these amorphous metal silicates, it is then possible to control cation exchange capacity of the resulting product which extends further control to the properties of these materials.
  • These amorphous materials are usually synthesized by reacting the appropriate metal ions with sodium silicate and then raising the pH by the addition of a suitable alkali solution. The resulting precipitate is then simply filtered, washed, and dried.
  • the selection of metal silicates includes, but is not necessarily restricted to, aluminum, magnesium, and lithium.
  • fluoride ions There can also be introduced into this system fluoride ions by the use of LiF or HF into the reaction mixture. These reactions are routinely carried out at temperatures in the range 95 ⁇ C-180 ⁇ C but temperatures as high as 300°C can be used. The lower temperatures, namely, 95 ⁇ C-100 ⁇ C allow the reaction to be carried out at atmospheric pressure which permits the use of non- pressurized systems, these systems being less expensive to install and operate.
  • amorpohous metal silicate materials are commercially available, including “Laponite” (available from Laporte Industries Ltd.) and “DAC 3" (available from Delta Chemicals) .
  • these amorphous metal silicates are white free-flowing powders. However, they can also be provided as an aqueous suspension, typically at concentrations of from 1% to 20% by weight. These concentrated solutions must be further diluted to achieve a working concentration of approximately 0.1 to 0.15% by weight, prior to addition to the paper furnish, by addition of water followed by moderate agitation.
  • the materials should be fully dispersible in water and the resultant colloidal dispersion should preferably possess a cation exchange capacity greater than 40 meg/g and a surface area greater than 200 M 2 /g.
  • Cationic polymers useful in the present invention are typically those having a molecular weight as characterized by intrinsic viscosity in the range of 5 to 25 dl/g and having a charge density of from 0.01 to 5 equivalents of cationic nitrogen per kg (0.1% to 50% mole substitution) as measured by polyelectrolyte titration.
  • Such polymers include, in addition to the quaternized Mannich polyacrylamides, polymers such as tertiary a ine Mannich polyacrylamides, quaternized and unquaternized copolymers of dimethylamino ethyl (or methyl) acrylate and acrylamide, polyethleneimines, dimethylamine- epichlorohydrin polymers, polyadmido-amines, and homo- and co-polymers (with acrylamide) of diallyldimethylammonium chloride.
  • polymers such as tertiary a ine Mannich polyacrylamides, quaternized and unquaternized copolymers of dimethylamino ethyl (or methyl) acrylate and acrylamide, polyethleneimines, dimethylamine- epichlorohydrin polymers, polyadmido-amines, and homo- and co-polymers (with acrylamide) of diallyldimethylammonium chloride.
  • Tertiary amine and quaternary amine derivatives of linear polyacrylamides having intrinsic viscosities in the range 6 to 18 dl/g and with charge densities in the range of 0.5 to 3.5 equivalents cationic nitrogen per kg polymer are preferred in practicing the present invention.
  • the polymer and the amorphous metal silicate material are typically employed in weight ratios of from 0.03 to 30:1, preferably in the range 0.5 to 4:1.
  • amorphous metal silicate will be added in amounts to produce a concentration of amorphous metal silicate in the paper stock in the range 0.2 to 6 lbs/ton dry base sheet, preferably in the range 0.5 to 4 lbs/ton dry base sheet.
  • the polymer will typically be added in amounts to produce a concentration of 0.5 to 4, preferably 0.6 to 2.5, lbs/ton of dry base sheet.
  • the methods of the present invention may be used in paper making as a drainage aid in the absence of a filler. These methods will also frequently be employed in conjunction with fillers (and pigments) , such as kaolin, calcium carbonate, talc, titanium dioxide, barium sulfate, bentonite or calcium sulfate in which case it will act as both a drainage aid and binder for the filler.
  • fillers and pigments
  • the method of the present invention will also frequently be employed in conjunction with sizing agents, colorants, optical brighteners and other minor ingredients of commercial paper-making furnishes.
  • the retention aids continue to perform its intended purpose in the presence of the additives.
  • a charge-bearing starch (e.g., from 1 to 30, preferably 2 to 10, lbs/ton of furnish) may also be present as a wet or dry strength additive. That is, amounts that result in a weight ratio of starch to amorphous metal silicate of 0.25 to 150:1, preferably 0.5 to 8:1, may be employed.
  • Such starch is conveniently a cationic starch having a degree of substitution above 0.03 (0.15 equivalents of nitrogen per kg starch).
  • an amphoteric starch may be used.
  • Particularly useful starches are potato starch, waxy maize starch, corn starch, wheat starch and rice starch.
  • Starch is usually added early in the system, typically to the machine chest, to allow it time to react with the various ingredients of the paper furnish. This system simply requires that starch, if used, be added and sufficiently mixed prior to the addition of the polymer and the amorphous metal silicate.
  • the addition of the amorphous metal silicate and the polymer can be made in either order and at any position as long as the other ingredients in the furnish have been added and well mixed.
  • the starch-polymer-amorphous metal silicate complex should, however, once formed, not be subjected to excessive shear forces.
  • a convenient way of achieving this is to add the starch at the machine chest, the polymer prior to the last point of high shear, and the amorphous metal silicate subsequent to the last point of high shear. This allows the starch sufficient time to react, the polymer to be sufficiently well mixed, and the resulting starch-polymer-amorphous metal silicate to be subjected to the minimum amount of shear.
  • the methods of the present invention can be used with a variety of paper making furnishes including those based on chemical, thermomechanical and mechanical treated pulps from both hard and softwood sources.
  • An acid paper furnish containing ground wood was obtained from an operating paper mill having a headbox consistency of 0.46%, a pH of 4.51, a conductivity of 610 ⁇ mho.cm "1 , and an alum concentration of 160 ppm.
  • a commercial cationic polyacrylamide retention aid (216A) of medium molecular weight and low charge density and a commercial cationic potato starch from Penford Products (Astro X-101) with medium charge density were used for these tests.
  • the polymer was made up at 0.05% and the starch at 1.0% and were prepared by techniques recommended by the manufacturers.
  • DAC 3 an amorphous metal silicate, available from Delta Chemicals, Searsport, Maine, and used as a 0.15% aqueous colloidal suspension, was also used in these tests.
  • EXAMPLE 2 An acid paper furnish containing ground wood was obtained from an operating paper mill. The headbox consistency of the furnish was 0.43%, the pH was 4.51 and the conductivity was 670 ⁇ mho.cm "1 .
  • Example 2 A method similar to that of Example 1 was used. These experiments were conducted in the absence of any additional starch.
  • the cationic polymer used was CD31HL
  • DAC 3 shows a strong interaction in the presence of polymer.
  • the performance when compared to 2D5, shows DAC 3 to give a significantly better response, particularly at the lower levels. It also demonstrates that DAC 3 can give a performance advantage if starch is absent.
  • An acid paper furnish containing ground wood was obtained from an operating paper mill.
  • the headbox consistency of the furnish was 0.40%, the conductivity was 628 ⁇ mho.cm "1 and the pH was 4.00.
  • a technique similar to that outlined in Example 1 was utilized.
  • the polyacrylamide used was 4240A, supplied by Delta Chemicals, which is a high molecular weight, high cationic charge polyacrylamide and was employed at a concentration of 0.05%.
  • the starch used was Sta-Lok 400 (Staley Manufacturing Company, Decatur, Illinois) , a cationic potato starch with a high degree of substitition. The starch was used as a 1% solution for these experiments.
  • EXAMPLE 4 An acid paper furnish containing ground wood was obtained from an operating mill. The headbox consistency of the furnish was 0.45%, the pH was 4.58 and the conductivity was 649 ⁇ mho.cm '1 . The polymer, colloids, and starch utilized were as described in Example 3. The component were mixed as described in Example 1. The results (summarized in Table IV) show that DAC 3 gives the strongest response in the presence of either polyacrylamide alone or polyacrylamide in combination with starch.
  • a machine trial was run using a cationic polyacrylamide and DAC 3.
  • the cationic polyacrylamide was a medium molecular weight low charge density material (commercially available from Allied Colloids as Percol 292) .
  • DAC 3 is as described previously. The polyacrylamide was added prior to the fan pump and screens and the DAC 3 was added after the screens and just before the headbox. Previously, the machine was using no polyacrylamide as the addition of polyacrylamide alone offered no benefits. Results are summarized in Table VI. TABLE VI BEFORE TRIAL

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

Abstract

Procédés de fabrication du papier dans lesquels on ajoute un polymère cationique et un silicate métallique amorphe à un chargement de papier avant de déverser celui-ci dans la caisse de tête d'une machine à fabriquer le papier.
PCT/US1992/004091 1991-05-17 1992-05-15 Production de papier et produits en papier WO1992020862A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU20081/92A AU650404B2 (en) 1991-05-17 1992-05-15 Production of paper and paper products
JP5500213A JPH06508185A (ja) 1991-05-17 1992-05-15 紙および紙製品の製造
BR9206006A BR9206006A (pt) 1991-05-17 1992-05-15 Processo para fabricar papel a partir de um fornecimento, e, papel ou papelão contendo como um aglutinante uma combinação de um material silicato de metal amorfo e um polimero catiônico
FI935069A FI935069A (fi) 1991-05-17 1993-11-16 Framstaellning av papper och pappersprodukter
NO934157A NO934157L (no) 1991-05-17 1993-11-17 Fremgangsmaate ved fremstilling av papir og papirprodukter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70115291A 1991-05-17 1991-05-17
US701,152 1991-05-17

Publications (1)

Publication Number Publication Date
WO1992020862A1 true WO1992020862A1 (fr) 1992-11-26

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ID=24816266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1992/004091 WO1992020862A1 (fr) 1991-05-17 1992-05-15 Production de papier et produits en papier

Country Status (8)

Country Link
EP (1) EP0584218A1 (fr)
JP (1) JPH06508185A (fr)
AU (1) AU650404B2 (fr)
BR (1) BR9206006A (fr)
CA (1) CA2102805A1 (fr)
FI (1) FI935069A (fr)
NO (1) NO934157L (fr)
WO (1) WO1992020862A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437118A1 (de) * 1994-10-05 1996-04-11 Technocell Dekor Gmbh & Co Kg Basispapier für dekorative Beschichtungssysteme
WO1997017289A1 (fr) * 1995-11-08 1997-05-15 Minerals Technologies Inc. Microparticules minerales synthetiques, systemes de sequestrants et de traitement d'eau et procedes d'utilisation desdites particules
ES2132011A1 (es) * 1996-08-07 1999-08-01 Fernandez Galo Polo Procedimiento de preparacion de aglomerados de carton o similar.
US6184258B1 (en) 1994-08-12 2001-02-06 Minerals Technologies Inc. Synthetic mineral microparticles for retention aid systems
WO2005071160A2 (fr) * 2004-01-23 2005-08-04 Buckman Laboratories International, Inc. Procede de production de papier
WO2006069660A1 (fr) * 2004-12-22 2006-07-06 Basf Aktiengesellschaft Procede de fabrication de papier, de carton-pate et de carton

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277728A2 (fr) * 1987-01-30 1988-08-10 Calgon Corporation Agents auxiliaires d'égouttage et de rétention pour des pâtes à papier de type journal
WO1989012661A1 (fr) * 1988-06-24 1989-12-28 Delta Chemicals, Inc. Procede de fabrication de papier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0277728A2 (fr) * 1987-01-30 1988-08-10 Calgon Corporation Agents auxiliaires d'égouttage et de rétention pour des pâtes à papier de type journal
WO1989012661A1 (fr) * 1988-06-24 1989-12-28 Delta Chemicals, Inc. Procede de fabrication de papier

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6184258B1 (en) 1994-08-12 2001-02-06 Minerals Technologies Inc. Synthetic mineral microparticles for retention aid systems
DE4437118A1 (de) * 1994-10-05 1996-04-11 Technocell Dekor Gmbh & Co Kg Basispapier für dekorative Beschichtungssysteme
US5679219A (en) * 1994-10-05 1997-10-21 Technocell Dekor Gmbh & Co. Kg Base paper for decorative coating systems
WO1997017289A1 (fr) * 1995-11-08 1997-05-15 Minerals Technologies Inc. Microparticules minerales synthetiques, systemes de sequestrants et de traitement d'eau et procedes d'utilisation desdites particules
ES2132011A1 (es) * 1996-08-07 1999-08-01 Fernandez Galo Polo Procedimiento de preparacion de aglomerados de carton o similar.
WO2005071160A2 (fr) * 2004-01-23 2005-08-04 Buckman Laboratories International, Inc. Procede de production de papier
WO2005071160A3 (fr) * 2004-01-23 2005-10-27 Buckman Labor Inc Procede de production de papier
WO2006069660A1 (fr) * 2004-12-22 2006-07-06 Basf Aktiengesellschaft Procede de fabrication de papier, de carton-pate et de carton
US7998314B2 (en) 2004-12-22 2011-08-16 Basf Aktiengesellschaft Method for the production of paper, cardboard and card

Also Published As

Publication number Publication date
BR9206006A (pt) 1994-08-02
AU2008192A (en) 1992-12-30
AU650404B2 (en) 1994-06-16
NO934157D0 (no) 1993-11-17
EP0584218A1 (fr) 1994-03-02
NO934157L (no) 1993-11-17
FI935069A0 (fi) 1993-11-16
CA2102805A1 (fr) 1992-11-18
FI935069A (fi) 1993-11-16
JPH06508185A (ja) 1994-09-14

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