AU2021278296A1 - Method for obtaining a fibrous preparation for immersion-resistant opaque paper - Google Patents

Method for obtaining a fibrous preparation for immersion-resistant opaque paper Download PDF

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Publication number
AU2021278296A1
AU2021278296A1 AU2021278296A AU2021278296A AU2021278296A1 AU 2021278296 A1 AU2021278296 A1 AU 2021278296A1 AU 2021278296 A AU2021278296 A AU 2021278296A AU 2021278296 A AU2021278296 A AU 2021278296A AU 2021278296 A1 AU2021278296 A1 AU 2021278296A1
Authority
AU
Australia
Prior art keywords
salts
obtaining according
fatty acid
calcium
fibrous preparation
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.)
Pending
Application number
AU2021278296A
Inventor
Véronique COMA
Stéphane GRELIER
Frédérique HAM-PICHAVANT
Erwan LE GOUE
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.)
Centre National de la Recherche Scientifique CNRS
PAPETERIE ZUBER RIEDER
Universite de Bordeaux
Institut Polytechnique de Bordeaux
Original Assignee
Centre National de la Recherche Scientifique CNRS
PAPETERIE ZUBER RIEDER
Universite de Bordeaux
Institut Polytechnique de Bordeaux
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 Centre National de la Recherche Scientifique CNRS, PAPETERIE ZUBER RIEDER, Universite de Bordeaux, Institut Polytechnique de Bordeaux filed Critical Centre National de la Recherche Scientifique CNRS
Publication of AU2021278296A1 publication Critical patent/AU2021278296A1/en
Pending legal-status Critical Current

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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
    • D21H17/63—Inorganic compounds
    • D21H17/66—Salts, e.g. alums
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/03—Non-macromolecular organic compounds
    • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
    • D21H17/14—Carboxylic acids; Derivatives thereof
    • 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
    • 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
    • D21H17/71—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes
    • D21H17/74—Mixtures of material ; Pulp or paper comprising several different materials not incorporated by special processes of organic and inorganic material
    • 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

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  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

The present invention relates to a method for obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state, characterised in that it comprises at least the following steps: - suspending fibres in water, - adding calcium salts to the fibres, - adding a source of carbonate salts in the form of an aqueous solution, - stirring the resulting mixture for a time sufficient to allow calcium carbonate particles to be precipitated, - adding a solution of fatty acid salts heated to a temperature which corresponds to the micellisation temperature of the fatty acid salts and takes into account the critical micellar concentration of the fatty acid salts, - stirring the mixture thus obtained for a time sufficient to allow the fatty acids to be absorbed at the surface of the calcium carbonate particles and to obtain the desired fibrous preparation.

Description

DESCRIPTION TITLE: METHOD FOR OBTAINING A FIBROUS PREPARATION FOR IMMERSION-RESISTANT OPAQUE PAPER
Technical field of the invention The present invention is situated in the field of obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state in order to be capable of being affixed, for example, to a wine or spirit bottle capable by the nature thereof of being stored in a wet environment such as, for example, a refrigerator or an ice bucket. Prior art In this specific technical field, the prior art includes French patent application FR 3 071 517 filed on behalf of the Applicant and disclosing an immersion-resistant opaque paper for manufacturing labels intended mainly for wine or spirit bottles, remarkable in that it consists of a uncoated base paper substrate composed of fibres and opacifying mineral fillers, said base paper substrate receiving on the front and back faces thereof a surface treatment consisting of mineral or other pigments, associated with water-soluble and synthetic binders. This paper for labels, while being of interest since, with the surface treatments, layers are obtained limiting the propagation of moisture towards the paper, has a certain number of drawbacks. Indeed, the opacity and dry and wet environment resistance features of this paper, which are only obtained with surface treatments, are therefore limited and do not make it possible to envisage other purposes than that of labels for wine or spirit bottles, capable due to the nature thereof of being stored in wet environments. Summary of the invention The aim of the present invention is therefore that of providing a method for obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state in order to be able to use said paper for numerous purposes, said fibrous preparation having the benefit of being capable of being manufactured on a single production line.
In this regard, the present invention relates to a method for obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state characterised in that it includes at least the following steps: - suspending fibres in water, - adding calcium salts to said fibres, - adding a source of carbonate salts in the form of an aqueous solution, - stirring the resulting mixture for a time sufficient to allow calcium carbonate particles to be precipitated, - adding a solution of fatty acid salts heated to a temperature which corresponds to the micellisation temperature of said fatty acid salts and takes into account the critical micellar concentration of said fatty acid salts, - stirring the mixture thus obtained for a time sufficient to allow the fatty acids to be absorbed at the surface of the calcium carbonate particles and to obtain the desired fibrous preparation. According to an advantageous embodiment, the final step is followed by a step of adding additives and/or dyes usually used in the paper industry to the fibrous preparation obtained. According to a conventional embodiment, the fibres are cellulose fibres. According to an advantageous embodiment, the calcium salts have either mineral counterions or organic counterions. The calcium salts are preferably calcium chloride. According to an advantageous embodiment, the carbonate salts have metallic counterions or the carbonate salts can also be mineral or organic. The carbonate salts are preferably sodium carbonate. According to an advantageous embodiment, the dosages of calcium salts and of carbonate salts used are advantageously determined to produce, by precipitation, a mass of calcium carbonate corresponding to at most 25% of the dry matter. Preferably, the mass of calcium carbonate produced corresponds to a value between 20 and 22% of the dry matter.
According to an advantageous embodiment, the fatty acid salts comprise between 12 and 22 carbons in their chain and their counterions can be metal or organic salts. According to an even more advantageous embodiment, the fatty acid salts comprise 18 carbons in their chain and will be, preferably, potassium stearate. The fatty acid salts are preferably potassium stearate. The invention also relates to a paper having significant water repellency and opacity in the dry or wet state remarkable in that it is manufactured from the fibrous preparation receiving calcium carbonate particles produced by precipitation and bound directly at the surface and/or in the fibres thereof, and fatty acids adsorbed at the surface of the calcium carbonate particles, and obtained with the method for obtaining according to the invention. Description of embodiments The method according to the invention for obtaining a method for obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state, is based on the principle of precipitating fillers on fibres then on modifying said fillers in order to render them less hydrophilic. Thus, the method for obtaining a fibrous preparation includes at least the following steps: - suspending fibres, conventionally cellulose fibres, in water, - adding calcium salts to said fibres, - adding a source of carbonate salts in the form of an aqueous solution, - stirring the resulting mixture for a time sufficient to allow calcium carbonate particles to be precipitated, - adding a solution of fatty acid salts heated to a temperature which corresponds to the micellisation temperature of said fatty acid salts and takes into account the critical micellar concentration (CMC) of said fatty acid salts, - stirring the mixture thus obtained for a time sufficient to allow the fatty acids to be absorbed at the surface of the calcium carbonate particles and to obtain the desired fibrous preparation. This final step can advantageously be followed by a step of adding additives and/or dyes usually used in the paper industry to the fibrous preparation obtained.
Said additives and/or dyes, which are well-known to a person skilled in the art, are such as, for example, alkyl ketene dimers (AKD), cationic starch, anionic pigmentary dyes, colloidal silica, or carboxymethylcellulose, in order to give the paper manufactured from the fibrous preparation increased whiteness and opacity. According to an advantageous embodiment, the calcium salts have either mineral counterions such as, for example, nitrate NO3, chloride Cl-, iodide I-, or bromide Br- counterions, or organic counterions and optionally be, for example, in the form of calcium carboxylates having one to several carbons such as, for example, calcium acetate. However, preferably, the calcium salts used are calcium chloride. Similarly, the carbonate salts in aqueous solution form have metallic counterions such as, for example, sodium Na', or potassium K' counterions. Moreover, the carbonate salts can also be mineral or organic such as, for example, dimethyl carbonate or ammonium carbonate. However, preferably, the carbonate salts used are sodium carbonate. Moreover, the dosages of calcium salts and carbonate salts used are advantageously determined to produce, by precipitation, a mass of calcium carbonate corresponding to at most 25% of the dry matter and, preferably, to a value between 20 and 22%. Furthermore, incorporating this calcium carbonate precipitation phase in the general method for manufacturing the fibrous preparation according to the invention makes it possible to ensure, when stirring the resulting mixture, the binding of the calcium carbonate particles directly at the surface and/or in the fibres, in order to increase the features of the fibrous preparation obtained. With the method for manufacturing a fibrous preparation according to the invention, it was observed that the calcium carbonate particles are, furthermore, unitary, non-agglomerated and of regular dimensions between 0.2 and 5 m. According to this advantageous embodiment, the fatty acid salts comprise between 12 and 22 carbons in their chain and their counterions can be metal salts (e.g.: Na , K') or organic salts (e.g.: NH4 '). The fatty acid salts will advantageously comprise 18 carbons in their chain and will be, preferably, potassium stearate. Adsorbing the fatty acids at the surface of the calcium carbonate particles makes it possible to render the latter less hydrophilic and therefore significantly increase the water-repellent feature of the fibres, the fibrous preparation obtained and the paper manufactured from said fibrous preparation. The method for obtaining according to the invention may include, if required, a step of adding fillers. The fibrous preparation obtained with the method according to the invention is then used, without additional treatment, on a conventional paper machine for manufacturing a paper having significant water repellency and opacity in the dry or wet state. However, the paper manufactured from the fibrous preparation obtained can subsequently be coated to improve the performances thereof further or give it further functions. Moreover, the method for obtaining according to the invention is particularly advantageous, since it does not include a fibre washing step, it can be semi continuous or continuous and implemented on a single production line, and the white water generated thereby can be reused during the process for manufacturing paper from the fibrous preparation obtained. Finally, it is clearly understood that the method for obtaining according to the invention makes it possible to act directly in the fibre mass of the fibrous preparation in order to obtain a specific fibrous preparation and not merely on the surface of a paper according to the prior art manufactured from a conventional fibrous preparation, which gives the paper manufactured from said specific fibrous preparation greater and more advantageous water repellency and opacity in the dry or wet state than those of the paper according to the prior art. Indeed, it is clearly understood that one of the innovative features of the method for obtaining according to the invention is based on having a step of adding a fatty acid salt solution, after precipitating the filler, said fatty acid salt solution used being heated at the micellisation temperature of said fatty acid salts. This step enables the adsorption of the micelles of fatty acids created (with the micellisation temperature) with the calcium carbonate precipitated on the fibre, which ultimately has the effect of rendering the fibres less hydrophilic. Thus, tests according to the Cobb method demonstrated that the method for obtaining a fibrous preparation according to the invention gives the paper manufactured from this fibrous preparation a low water absorption over long periods of time. Indeed, the quantity of water absorbed by said paper after immersion for one hour only increases by 30% after 24 hours of immersion, thus proving the stabilisation over time of the water-resistance properties thereof Moreover, it is clearly understood that with a lower water absorption, said paper has lower distortion and greater dimensional stability. Moreover, the opacity properties of the paper manufactured from the fibrous preparation obtained with the method for obtaining according to the invention are also very good. The dry opacity of the paper is high and after immersion in water, this opacity decreases merely by close to 3% to remain stable even after 24 hours of immersion in water. It is clearly understood that the method for obtaining according to the invention is advantageously intended to produce a fibrous preparation for manufacturing a paper for wine or spirit bottle labels. However, it is obvious that, given the high water repellency and opacity features given to the paper manufactured from the fibrous preparation obtained with the method for obtaining according to the invention, said paper may be intended for many other purposes such as, for example, the manufacture of food packaging or not. Finally, it is obvious that the examples of methods for obtaining a fibrous preparation according to the invention described above are merely specific, in no way restrictive, illustrations of the invention.

Claims (13)

1. Method for obtaining a fibrous preparation for manufacturing a paper having significant water repellency and opacity in the dry or wet state characterised in that it includes at least the following steps: - suspending fibres in water, - adding calcium salts to said fibres, - adding a source of carbonate salts in the form of an aqueous solution, - stirring the resulting mixture for a time sufficient to allow calcium carbonate particles to be precipitated, - adding a solution of fatty acid salts heated to a temperature which corresponds to the micellisation temperature of said fatty acid salts and takes into account the critical micellar concentration of said fatty acid salts, - stirring the mixture thus obtained for a time sufficient to allow the fatty acids to be absorbed at the surface of the calcium carbonate particles and to obtain the desired fibrous preparation.
2. Method for obtaining according to claim 1 characterised in that the final step is followed by a step of adding additives and/or dyes usually used in the paper industry to the fibrous preparation obtained.
3. Method for obtaining according to any one of claims 1 or 2 characterised in that the fibres are cellulose fibres.
4. Method for obtaining according to any one of claims 1 to 3 characterised in that the calcium salts have either mineral counterions or organic counterions.
5. Method for obtaining according to claim 4 characterised in that the calcium salts are calcium chloride.
6. Method for obtaining according to any one of claims 1 to 5 characterised in that the carbonate salts have metallic counterions or the carbonate salts can also be mineral or organic.
7. Method for obtaining according to claim 6 characterised that the carbonate salts are sodium carbonate.
8. Method for obtaining according to any one of claims 1 to 7 characterised in that the dosages of calcium salts and of carbonate salts used are advantageously determined to produce, by precipitation, a mass of calcium carbonate corresponding to at most 25% of the dry matter.
9. Method for obtaining according to claim 8 characterised in that the mass of calcium carbonate produced corresponds to a value between 20 and 22% of the dry matter.
10. Method for obtaining according to any one of claims 1 to 9 characterised in that the fatty acid salts comprise between 12 and 22 carbons in their chain and their counterions can be metal or organic salts.
11. Method for obtaining according to claim 10 characterised in that the fatty acid salts comprise 18 carbons in their chain and will be, preferably, potassium stearate.
12. Method for obtaining according to claim 11 characterised in that the fatty acid salts are potassium stearate.
13. Paper having significant water repellency and opacity in the dry or wet state characterised in that it is manufactured from the fibrous preparation receiving calcium carbonate particles produced by precipitation and bound directly at the surface and/or in the fibres thereof, and fatty acids adsorbed at the surface of the calcium carbonate particles, and obtained with the method for obtaining according to any one of claims 1 to 12.
AU2021278296A 2020-05-28 2021-05-27 Method for obtaining a fibrous preparation for immersion-resistant opaque paper Pending AU2021278296A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR2005654A FR3110919B1 (en) 2020-05-28 2020-05-28 METHOD FOR OBTAINING A FIBROUS PREPARATION FOR IMMERSION-RESISTANT OPAQUE PAPER
FRFR2005654 2020-05-28
PCT/EP2021/064218 WO2021239882A1 (en) 2020-05-28 2021-05-27 Method for obtaining a fibrous preparation for immersion-resistant opaque paper

Publications (1)

Publication Number Publication Date
AU2021278296A1 true AU2021278296A1 (en) 2022-12-01

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AU2021278296A Pending AU2021278296A1 (en) 2020-05-28 2021-05-27 Method for obtaining a fibrous preparation for immersion-resistant opaque paper

Country Status (6)

Country Link
US (1) US20230193560A1 (en)
EP (1) EP4158100A1 (en)
AU (1) AU2021278296A1 (en)
FR (1) FR3110919B1 (en)
WO (1) WO2021239882A1 (en)
ZA (1) ZA202212178B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5275699A (en) * 1992-10-07 1994-01-04 University Of Washington Compositions and methods for filling dried cellulosic fibers with an inorganic filler
EP3012223A1 (en) * 2014-10-24 2016-04-27 Omya International AG PCC with reduced portlandite content
FR3071517B1 (en) 2017-09-22 2021-12-24 Papeterie Zuber Rieder IMMERSION RESISTANT OPAQUE PAPER

Also Published As

Publication number Publication date
US20230193560A1 (en) 2023-06-22
EP4158100A1 (en) 2023-04-05
FR3110919B1 (en) 2022-06-24
ZA202212178B (en) 2023-05-31
FR3110919A1 (en) 2021-12-03
WO2021239882A1 (en) 2021-12-02

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