EP0215044B1 - Procede de preparation d'une feuille fibreuse par voie papetiere - Google Patents

Procede de preparation d'une feuille fibreuse par voie papetiere Download PDF

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Publication number
EP0215044B1
EP0215044B1 EP19860901427 EP86901427A EP0215044B1 EP 0215044 B1 EP0215044 B1 EP 0215044B1 EP 19860901427 EP19860901427 EP 19860901427 EP 86901427 A EP86901427 A EP 86901427A EP 0215044 B1 EP0215044 B1 EP 0215044B1
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EP
European Patent Office
Prior art keywords
filler
fibers
aqueous suspension
binder
binder mixture
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19860901427
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German (de)
English (en)
French (fr)
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EP0215044A1 (fr
Inventor
Daniel Gomez
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Papeteries de Gascogne SA
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Papeteries de Gascogne SA
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Priority to AT86901427T priority Critical patent/ATE53411T1/de
Publication of EP0215044A1 publication Critical patent/EP0215044A1/fr
Application granted granted 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
    • 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
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/56—Polyamines; Polyimines; Polyester-imides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • 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
    • D21H17/20—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
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • 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
    • 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 relates to a new process for preparing a fibrous sheet by the papermaking route in order to improve, in general, the retention and, in particular, that of opacifying agents, by limiting the manufacturing costs and by preserving or improving the mechanical properties compared to previously known techniques. It also relates, as a new industrial product, to the fibrous sheet obtained by this process.
  • This new process is particularly useful in the manufacture of paper and cardboard, especially in the field of printing-writing, packaging, coatings and special papers. It is particularly advantageous for the retension of mineral fillers such as opacifying agents in order to improve opacity, in particular opacity-contrast and opacity in oil.
  • the new process which is recommended is particularly advantageous for improving the retention of opacifying means.
  • titanium oxide in particular of rutile or anatase variety, is an opacity and whitening pigment commonly used in paints, inks, plastics, paper and cardboard, cosmetics and ceramics, in particular due to its high covering power conferred by its high refractive index and its absorption by UV rays
  • opacity pigment particularly interesting with regard to opacity-contrast and especially opacity in oil.
  • This opacity pigment consists of a mixture of 10 to 70% by weight of TiO 2 and 30 to 90% by weight of an adjuvant chosen from lamellar silicates, and is obtained by co-grinding of Ti0 2 and said lamellar adjuvant in order to generate an adsorption of titanium oxide on the fragmented particles of the adjuvant.
  • lamellar silicates which are suitable according to this patent application, mention is made in particular of talc (hydrated magnesium silicate), chlorite (hydrated magnesium and aluminum silicate), kaolin, mica, phlogopite and their mixtures.
  • the retention is improved and savings are made on the manufacturing costs while preserving or improving the mechanical properties of the fibrous sheets compared to the previously known papermaking techniques, when Ti0 2 is used. as the only opacifying filler, on the one hand, and with the said more economical opacity pigment, the subject of the aforementioned application FR-A-2 575 170, on the other hand.
  • the quantity of mineral filler entering the paper must be increased (for example, 4 parts by weight of Ti0 2 are replaced by 7 parts by weight d '' a co-ground mixture of 80% by weight of lamellar silicate and 20% by weight of Ti0 2 ) to obtain an equivalent opacity.
  • the content of the mineral filler is increased, the mechanical properties of the resulting fibrous sheet are reduced.
  • the disadvantage of the increase in the content of mineral filler is overcome by retaining or even improving the mechanical properties such as in particular the resistance to rupture and bursting, in particular when a good opacity is sought. .
  • fibrous sheet here is meant a composite material comprising fibers, a mineral filler, a binding agent and at least one flocculating means.
  • This composite material which is prepared by the papermaking process, can also contain one or more conventional additives in stationery.
  • the term “fibrous sheet” includes paper and board when the predominant fibers are cellulosic fibers, on the one hand, and nonwovens or synthetic papers when the fibers used are essentially non-cellulosic fibers. , on the other hand.
  • the composite material obtained according to the abovementioned process is useful as a print-write support, coating support, packaging support or for obtaining special supports (in particular photographic supports, supports for carbonless copies and supports for stratification).
  • the composite material according to the invention is particularly advantageous in particular in (i) the field of supports intended for impregnation with phenolic resins and / or melamines for the production of limited or laminated panels, in order to avoid the material becoming transparent, (ii) the field of packaging supports (food packaging in particular) which must remain opaque in contact with grease or after complexing with waxes, resins and / or polymers which tend to affect the opacity of the final product.
  • All the fibers are suitable for the preparation of the fibrous sheet according to the invention, in particular natural organic fibers (cellulosic fibers) or synthetic fibers (polyamide, polyester, polyalkylene, polyacrylate fibers) and mineral fibers (glass fibers, ceramic, acicular gypsum, carbon and rock wool) and their mixtures.
  • natural organic fibers cellulosic fibers
  • synthetic fibers polyamide, polyester, polyalkylene, polyacrylate fibers
  • mineral fibers glass fibers, ceramic, acicular gypsum, carbon and rock wool
  • noble wood fibers are used, namely unbleached softwood and hardwood fibers, semi-bleached or bleached, optionally combined with recovered fibers, for example from old paper and textiles.
  • cellulosic fibers with fibers of high synthetic polymers such as polyamide, polyester, polyethylene, polypropylene fibers or with mineral fibers such as glass, ceramic and calcium sulphate fibers. and carbon, or to cellulose regeneration fibers, or to their mixtures.
  • high synthetic polymers such as polyamide, polyester, polyethylene, polypropylene fibers or with mineral fibers such as glass, ceramic and calcium sulphate fibers. and carbon, or to cellulose regeneration fibers, or to their mixtures.
  • an anionic means to the aqueous suspension of stage 1 ° fibers in order to make said fibers substantial by strengthening their anionic power.
  • This means which contributes to improving the fiber-filler connections and consequently the internal cohesion of the fibrous sheet, is introduced into said aqueous suspension of the fibers before the incorporation in stage 3 ° of the flocculated particles of the filler-binder mixture.
  • this anionic means will be chosen from polymers of the poyacrylic derivative type such as polyacrylamides (in particular modified polyacrylamides having a high average molecular weight - of the order of 5 ⁇ 10 6 to 10 7 ) sodium polymetacrylamides, polyacrylates and polymethacrylates , potassium and ammonium.
  • the amount of anionic means depends on the anionicity of the paste used, which is linked to the manufacturing process (kraft or bisulfite paste) but also to the conditions for washing the paste before use.
  • a kraft pulp from an integrated factory has a much more anionic character than a dried and stored pulp before being sent to the paper machine.
  • a dose of 0.02% to 0.5% by weight of anionic means relative to the weight of the fibrous sheet will be used, and preferably 0.05% to 0.2% of said means relative to the weight of the fibrous sheet.
  • the mineral fillers according to the invention are essentially non-binding mineral fillers.
  • Particularly suitable are the usual mineral fillers in the stationery and paint industries such as, for example, talc, kaolin, natural calcium carbonate, precipitated or originating from the regeneration operations of black liquors extracted from the cooking of kraft pastes and more. particularly after the caustification operation, magnesium carbonate, alumina hydrates, calcium sulfate, colloidal silica, barium sulfate, titanium dioxide, satin white (hydrated calcium sulfoaluminate), magnesium hydroxide, or mixtures thereof.
  • opacity pigment described in the French patent application FR-A-2 575 170 mentioned above.
  • This opacity pigment is obtained by co-grinding of Ti0 2 and of the lamellar silicate in such a way that the fragmented Ti0 2 particles are adsorbed on the new activated surfaces resulting from the fragmentation of the lamellar silicate.
  • the aforementioned French patent application demonstrates how and why this pigment is distinguished, both in terms of structure and in terms of final opacity, from the physical mixtures of the two ingredients previously envisaged.
  • the co-grinding can be carried out dry by introducing Ti0 2 and the lamellar silicate into a gas stream adapted to entrain the particles of the two products at a supersonic speed and to project them against each other in order to obtain the fragmentation and the aforementioned adsorption, in particular by means of a "JET-O-MIZER” type shredder (manufactured by the Fluid-Energy company) or "COX" (manufactured by the Cox-Brothers and C ° company).
  • JET-O-MIZER type shredder
  • COX manufactured by the Cox-Brothers and C ° company
  • Co-grinding can also be carried out by the wet method by preparing a liquid suspension containing the starting products in divided form and by agitating this suspension in the presence of solid balls so as to break up the particles of the two products between the balls in order to obtain the aforementioned fragmentation and adsorption, in particular by means of a grinder of the "BABCOCK BALL MILL" type.
  • Said opacity pigment is a mixture consisting of 10 to 70% by weight of Ti0 2 and 90 to 30% by weight of lamellar silicate (talc, chlorite, kaolin, mica, phlogopite and their mixtures); it advantageously has an average particle size (as defined in said French application) of between 0.5 and 1.5 microns and is obtained by co-grinding of Ti0 2 having an average particle size of 60 to 100 microns and of lamellar silicate having an average particle size greater than 2.5 microns and preferably between 8 and 12 microns.
  • lamellar silicate talc, chlorite, kaolin, mica, phlogopite and their mixtures
  • the aforementioned French application recommends in particular for the opacity-contrast a pigment consisting of 30 to 50% by weight of Ti0 2 and from 70 to 50% by weight of lamellar silicate, and for the opacity in oil a pigment consisting from 10 to 30% by weight of Ti0 2 and from 90 to 70% by weight of lamellar silicate.
  • the mineral filler-fiber weight ratio is not critical, it can be in particular between 0.01 and 6, depending on the desired applications.
  • the amount of mineral filler in the fibrous sheet may vary from 5 to 40% by weight, and in particular from 10 to 30% by weight relative to the weight of said fibrous sheet.
  • the loading rate may be greater than 50% by weight relative to the weight of the fibrous sheet.
  • the amount of mineral filler may vary between 2 and 15% by weight relative to the weight of the fibrous sheet. .
  • the organic binder which can be used in the process according to the invention is any organic binder, natural or synthetic, usually used in stationery. It ensures the connection of the constituents of the material together and makes it possible to improve the physical properties of the sheet material.
  • binders which are suitable according to the invention, mention may in particular be made of starches which are native or chemically, enzymatically or thermally modified, dextrins, polyvinyl alcohols, casein, animal glue, vegetable proteins, cellulose esters such as carboxymethylcellulose, alginates, dispersions of synthetic polymers such as carboxylated or non-carboxylated styrene-butadiene latexes, acrylic latexes, styrene-acrylic latexes, vinyl acetate latexes, neoprene latexes, acrylonitrile latexes, vinyl chloride latexes and mixtures thereof.
  • the amount of binder depends on the end use envisaged for the sheet material; it can in particular vary between 1 and 40 parts by weight, and preferably between 1 and 25 parts by weight, relative to 100 parts by weight of fibers and mineral filler.
  • the pre-flocculation of the mineral filler-binder mixture of stage 2 ° is carried out by means of a flocculant which aims to ionically destabilize said filler-binder mixture before mixing with the fibers.
  • This product hereinafter designated “flocculant I”
  • flocculant I will advantageously be chosen from cationic organic flocculants rather than from mineral cationic flocculants such as aluminum sulphate and aluminum polychlorides.
  • organic cationic flocculants which are suitable in the process of the invention, mention may in particular be made of polyethyleneimine, polyamideamine, especially crosslinked polyalkylamine, especially modified polyacrylamide, quaternary ammonium compounds such as in particular hydroxypropyltrimethylammonium chloride and starches cationic.
  • this quantity is adjusted so that the preflocculation of the filler-binder mixture is carried out essentially in one minute at most.
  • the average diameter of the flocs of the filler-binder mixture is between 0.01 and 0.3 mm, and preferably between 0.03 and 0.15 mm, when said pre-flocculated mixture is introduced into the aqueous suspension of fibers. If the average diameter of said flocs is less than 0.01 mm, the fabric losses may increase, and if the average diameter of said flocs is more than 0.3 mm, there is a serious risk that the fibrous sheet formed will not be uniform or the air is not good.
  • the pre-flocculated filler-binder mixture is introduced at the 3 ° stage as close as possible to the headbox, so that the duration of contact of the filler-binder mixture with the fibers is between 10 and 60 seconds, and preferably between 10 and 45 seconds. If said contact time is greater than 60 seconds, there will be excessively large fiber-filler-binder flocs and consequently the fibrous sheets may not be uniform.
  • stage 4 ° the cationic flocculant, which is incorporated into the fiber-filler-binder mixture resulting from stage 3 °, is introduced into the head circuits very close to the head box so that the duration of contact of said flocculant with the fiber-filler-binder mixture is less than 45 seconds and preferably between 8 and 30 seconds.
  • the cationic flocculant of stage 4 ° which is designated hereinafter "flocculant 11" will be chosen from organic and mineral ionic destabilizing agents.
  • the flocculant II may, like flocculant I, be a cationic organic substance, or unlike flocculant I, a cationic mineral substance such as for example aluminum sulphate and poly aluminum chloride.
  • the flocculant It can be identical to the flocculant I.
  • the flocculant It is a cationic mineral substance such as for example aluminum sulphate
  • the white water which is collected in the wet part of the paper machine, in particular under the cloth, and that is recycled, increase the size of the load-binder flocs, because of their Al 2 (S0 4 ) 3 content .
  • two solutions are recommended: do not bring the recycled white water into contact with the aqueous suspension of the filler-binder mixture from stage 2 ° until the start of stage 3 °, or provide a shearing device to reduce the diameter by means of the flocs of said filler-binder mixture just before its introduction into the aqueous suspension of fibers at stage 3 °.
  • the ionic demand of the fibers in the suspension containing said fibers, the mineral filler and the binder obtained in stage 3 ° is less than or equal to 20 milliequivalents per gram of dry matter.
  • the ionic demand will be in particular from 1 to 4 milliequivalents per gram, and for a fibrous sheet intended for the printing-writing field, the ionic demand will be in particular of the order of 10 milliequivalents per gram.
  • the method according to the invention having regard to the above-mentioned contact durations, comprises a large number of continuous operations.
  • the cellulosic fibers in aqueous suspension coming from defibering in a pulper (non-integrated factory) or directly from the pulp manufacturing workshop (integrated factory) are stored at a concentration of 0-400 g / I with stirring in a copper;
  • the cellulosic fibers are conventionally refined to a Schoepper-Riegler degree of between 15 and 65 depending on the applications, at a variable concentration of between 20 and 350 g / l, in particular between 20 and 60 g / l, using standard conical or double disc refiners, or in particular between 250 and 350 g / I with special refiners for high concentration refining, in particular in the case of the production of packaging supports, in order to obtain a high tear resistance .
  • the organic and / or mineral fibers that we want to associate with cellulosic fibers;
  • the anionic means required as indicated above to make the fibers substantial are added with stirring, at a dose of between 0.02 and 0.5% and preferably 0.05 to 0.2% by weight relative to the weight of the fibrous sheet.
  • the mineral filler is dispersed in an aqueous medium at a concentration of between 150 and 600 g / l, preferably at a concentration of 300-400 g / I.
  • This mineral filler may consist entirely of an opacifying agent or of a mixture of several fillers including in particular an opacifying agent.
  • the preferred binder is native starch.
  • c) mixing is carried out with stirring, preferably continuously, of the aqueous suspension of the mineral filler and of the aqueous preparation of the binder.
  • This operation is advantageously carried out in a dynamic conical mixer with a propeller which ensures perfect homogeneity of the filler-binder mixture.
  • the flocculant is incorporated into said filler-binder mixture after having been diluted with water from 10 to 100 times (dilution greater than 10 times and less than or equal to 100 times).
  • the amount of flocculant 1 that is introduced is between 0.006 and 5 parts by weight, and preferably between 0.01 and 2 parts by weight per 100 parts by dry weight of the filler-binder mixture.
  • the charge suspension is introduced continuously, on the one hand, and the aqueous preparation of the binder, on the other hand, each in the vicinity of the top of a dynamic conical mixer with a propeller; the flocculant 1 is continuously introduced in the vicinity of the middle of the height of said mixer which comprises, near its lower end, a dilution water inlet, in order to carry out the required dilutions.
  • the charge-binder mixture thus pre-flocculated is collected continuously at the lower end of the mixer.
  • the charge-binder mixer pre-flocculated in aqueous suspension at 100-200 g / I is introduced continuously at the level of the head circuits in the aqueous suspension of the fibers prepared in stage 1 °, the mean flock diameter of said charge-binder mixture being included between 0.01 and 0.3 mm, and preferably between 0.03 and 0.15 mm, the introduction of said pre-flocculated mixture being carried out as close as possible to the headbox so that the contact time of said mixture load-binder with the fibers is less than 60 seconds and advantageously between 10 and 45 seconds.
  • a small amount of flocculant II is incorporated into the mixture resulting from stage 3 ° to strengthen the bonding of the flocs and improve the final retention on the fabric of the paper machine, the contact time of flocculant Il with the flocculated fibers-filler-binder mixture being less than 45 seconds and preferably between 8 and 30 seconds.
  • the other additives mentioned above such as bonding agents, optical brighteners, etc. can be incorporated either after refining the cellulosic fibers in stage 1 °, or after the introduction of the charge-binder mixture pre-flocculated in stage 3 °.
  • the fibrous sheets obtained according to the method of the invention are referenced as being “Ex” products
  • the fibrous sheets according to the prior art are referenced as being products “A” (conventional technique) and “B” (technique of FR-A-2 492 425).
  • a fibrous sheet is prepared according to the best mode given above from cellulosic fibers constituted by a mixture of and the opacity pigment according to Example 1 of the aforementioned FR-A-2,575,170 obtained by co-grinding a mixture of the other operating conditions being as follows
  • a fibrous sheet useful as a writing printing medium having a grammage of 64 g / m 2 is formed .
  • a fibrous sheet in 64 g / m 2 is prepared from the cellulose fibers and the opacity pigment according to example 1 above with the same values for d m , t 1 and respectively t 2 .
  • the fibrous sheet of Example 2 was compared with a fibrous sheet (A2) obtained under substantially similar conditions with regard to the choice of cellulosic fibers, binder and flocculant I, the opacity pigment being replaced by Ti0 2 as in comparative test 1 above.
  • a fibrous sheet for packaging in 70 g / m 2 is prepared from a mixture of cellulosic fibers comprising opacity pigment according to example 1 above with values d m , t 1 and t 2 identical to those of said example 1.
  • Example 3 The product obtained according to Example 3 was compared with a conventional fibrous sheet (A3) in 70 g / m 2 in which the opacity pigment was replaced by TiO 2 , the cellulosic fibers and the average particle size of the Ti0 2 of the A3 paper being respectively identical to the fibers of Example 3 and to the average particle size of the opacity pigment.
  • the compositions of Ex 3 and A3, as well as the results which were obtained are reported in Table III.
  • a basic support for carbonless carbon is prepared according to the invention (Ex 4) from a mixture of cellulosic fibers comprising: the opacity pigment is identical to that of Example 1 above as well as the values d m , t 1 and t 2 .
  • the support thus obtained has a grammage of 40 g / m 2 .
  • a support for lamination (Ex 5) according to the invention is prepared from a mixture of cellulosic fibers comprising: the opacity pigment is identical to that of Example 1 above, as well as the values d m , t 1 and t 2 .
  • a support for stratification of 90 g / m 2 is obtained.
  • the corresponding results are recorded in Table V below. It is noted that the saving on the cost of the composition exceeds 25%.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
EP19860901427 1985-03-18 1986-03-07 Procede de preparation d'une feuille fibreuse par voie papetiere Expired - Lifetime EP0215044B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86901427T ATE53411T1 (de) 1985-03-18 1986-03-07 Verfahren zur herstellung eines faserblattes auf papiermacherart.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8503947A FR2578870B1 (fr) 1985-03-18 1985-03-18 Procede de preparation d'une feuille fibreuse par voie papetiere pour ameliorer la retention et en particulier l'opacite.
FR8503947 1985-03-18

Publications (2)

Publication Number Publication Date
EP0215044A1 EP0215044A1 (fr) 1987-03-25
EP0215044B1 true EP0215044B1 (fr) 1990-06-06

Family

ID=9317288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860901427 Expired - Lifetime EP0215044B1 (fr) 1985-03-18 1986-03-07 Procede de preparation d'une feuille fibreuse par voie papetiere

Country Status (7)

Country Link
EP (1) EP0215044B1 (fi)
JP (1) JPS62502696A (fi)
DE (1) DE3671767D1 (fi)
ES (1) ES8801009A1 (fi)
FI (1) FI81157C (fi)
FR (1) FR2578870B1 (fi)
WO (1) WO1986005530A1 (fi)

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* Cited by examiner, † Cited by third party
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FR2618373B1 (fr) * 1987-07-23 1990-03-23 Arjomari Prioux Feuille thermoplastique renforcee et son procede de fabrication
GB9301451D0 (en) * 1993-01-26 1993-03-17 Allied Colloids Ltd Production of filled paper
US5830317A (en) * 1995-04-07 1998-11-03 The Procter & Gamble Company Soft tissue paper with biased surface properties containing fine particulate fillers
US5958185A (en) * 1995-11-07 1999-09-28 Vinson; Kenneth Douglas Soft filled tissue paper with biased surface properties
US5611890A (en) * 1995-04-07 1997-03-18 The Proctor & Gamble Company Tissue paper containing a fine particulate filler
US5672249A (en) * 1996-04-03 1997-09-30 The Procter & Gamble Company Process for including a fine particulate filler into tissue paper using starch
US5700352A (en) * 1996-04-03 1997-12-23 The Procter & Gamble Company Process for including a fine particulate filler into tissue paper using an anionic polyelectrolyte
US5759346A (en) * 1996-09-27 1998-06-02 The Procter & Gamble Company Process for making smooth uncreped tissue paper containing fine particulate fillers
AU1442600A (en) * 1998-10-14 2000-05-01 Mead Corporation, The Colorant application on the wet end of a paper machine
JP4788429B2 (ja) * 2005-03-25 2011-10-05 日本製紙株式会社 紙力と剛度を改善した紙とその製造方法、及びプラスチックワイヤー摩耗性の改善方法
JP2007092203A (ja) * 2005-09-28 2007-04-12 Nippon Paper Industries Co Ltd オフセット印刷用中性新聞用紙

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FR1443777A (fr) * 1964-08-17 1966-06-24 Basf Ag Procédé permettant d'augmenter l'efficacité d'auxiliaires polymères cationiques utilisés dans la fabrication du papier
FR2492425A1 (fr) * 1980-10-21 1982-04-23 Gascogne Papeteries Procede de preparation par des techniques papetieres d'un materiau en feuille avec une retention sur machine amelioree, materiau en feuille ainsi obtenu et son application notamment dans le domaine de l'impression-ecriture, de l'emballage et des revetements
US4445970A (en) * 1980-10-22 1984-05-01 Penntech Papers, Inc. High mineral composite fine paper

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FI81157B (fi) 1990-05-31
FI864653A (fi) 1986-11-14
ES553296A0 (es) 1987-12-01
FI864653A0 (fi) 1986-11-14
FI81157C (fi) 1990-09-10
FR2578870B1 (fr) 1988-07-29
JPS62502696A (ja) 1987-10-15
EP0215044A1 (fr) 1987-03-25
ES8801009A1 (es) 1987-12-01
DE3671767D1 (de) 1990-07-12
FR2578870A1 (fr) 1986-09-19
WO1986005530A1 (fr) 1986-09-25

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