EP3177408B1 - Procédé de revêtement en continu d'une bande de substrat fibreux à base de cellulose avec du chlorure d'acide gras - Google Patents

Procédé de revêtement en continu d'une bande de substrat fibreux à base de cellulose avec du chlorure d'acide gras Download PDF

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Publication number
EP3177408B1
EP3177408B1 EP15829002.3A EP15829002A EP3177408B1 EP 3177408 B1 EP3177408 B1 EP 3177408B1 EP 15829002 A EP15829002 A EP 15829002A EP 3177408 B1 EP3177408 B1 EP 3177408B1
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EP
European Patent Office
Prior art keywords
fatty acid
acid chloride
cellulose
fibrous substrate
substrate web
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EP15829002.3A
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German (de)
English (en)
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EP3177408A4 (fr
EP3177408A1 (fr
Inventor
Christian Eichholz
Hubertus KRÖNER
Benjamin SCHMIDT-HANSBERG
Lukas WENGELER
Jochen GATTERMAYER
Nils LAWRENZ
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Delfortgroup AG
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Delfortgroup AG
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Priority to PL15829002T priority Critical patent/PL3177408T3/pl
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Publication of EP3177408A4 publication Critical patent/EP3177408A4/fr
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    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/02—Chemical or biochemical treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
    • B05D3/0406—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases the gas being air
    • 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
    • D21H17/11—Halides
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/10—Coatings without pigments
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • 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
    • 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
    • D21H23/22—Addition to the formed 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/002—Tissue paper; Absorbent 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/08—Filter 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper

Definitions

  • the present invention relates to a method for continuously coating a cellulose-based fibrous substrate web with fatty acid chloride and a coating device for continuously coating the fibrous substrate web with a liquid fatty acid chloride composition.
  • cellulose-based fibrous substrates such as paper, cardboard or cardboard
  • hydrophobizing agents a possibility of reducing the penetration of moisture into fibrous substrates.
  • the stability of cellulose-based fibrous substrates can be at least partially maintained even when exposed to moisture.
  • the fatty acid chloride is dissolved in an organic solvent before application to a fibrous substrate web. While the solvent evaporates in a thermal dryer, the applied fatty acid chloride reacts with the hydroxyl groups of the paper pulp substrate with elimination of hydrogen chloride to form covalently bound fatty acid. Safe handling of the solvent is not without problems with the solvent-based processes and there is a risk of explosion if the solvent content is usually high. Thus, these methods, if at all, can only be mastered in the production process of a fibrous substrate web with a high level of security.
  • Solvent-free processes for coating with fatty acid chlorides in turn have the disadvantage of poorer water repellency properties and of high ones which do not adhere to the fibrous substrate web bound, fatty acid components, which puts a strain on the production cycle.
  • Another disadvantage of known processes is that they require very high application weights in order to achieve good water repellency properties.
  • the WO 99/08784 describes a method for treating a solid hydrophilic material, e.g. As paper or glass, with a composition containing a reactive hydrophobicizing agent, in particular a fatty acid chloride, which reacts with the hydrophilic material to form covalent bonds, whereby a hydrophobic impregnation is obtained.
  • a solution of the reactive hydrophobicizing reagent in an organic solvent is applied to the material in such a way that the hydrophobicizing reagent is deposited on the material in a finely divided form, ie in the form of a microdispersion.
  • the material treated in this way is then subjected to an air stream, the hydrophobicizing reagent reacting with the substrate to form a covalent bond and volatile substances, in particular the hydrogen chloride liberated in the reaction of the hydrophobicizing reagent with the substrate, being removed.
  • the process requires the use of large amounts of organic solvents.
  • the US 2013 / 0236647A1 describes a method for treating cellulose-based fibrous substrates, such as paper, cardboard or cardboard, with fatty acid chloride by means of an engraving coating. After gravure coating of the cellulose-based fibrous substrate with fatty acid chloride, the cellulose-based fibrous substrate web is passed over a drying cylinder for drying and dried by means of contact drying.
  • the disadvantage is high levels of fatty acids, which are not bound to the cellulose-based fiber substrate and thus put a strain on the production cycle.
  • the present invention is therefore based on the object of providing an improved method for the continuous coating of a fibrous substrate web with fatty acid chloride, in which the aforementioned disadvantages are largely avoided.
  • the process is intended to lead to products that are achieved in terms of The water repellency and durability of the coating are comparable to waxes and thus allow a "wax replacement".
  • the products produced by the process according to the invention should meet the requirements for the paper recycling cycle and should be recyclable.
  • fibrous substrate webs produced with the method according to the invention meet the requirements for recyclability in conventional paper recycling cycles or improve its recyclability.
  • the products produced by the process according to the invention also have good hydrophobic properties when the fatty acid chloride is applied at a low weight and also show good, in particular adequate strength properties when and / or after exposure to moisture, for example exposure to 30 minutes of moisture, and meet the requirements of test standards.
  • test standards are the tear length according to EN ISO 1924-05/2009, the short crush test according to DIN 54518 - 03/2004, the edge wicking test (http://www.istragrafika.com/preuzimanja/files/l mportant -Parameters-for-Paper-and-Paperhoard_Technical_Notes.pdf) and the Cobb test according to DIN EN 20535 - 10/1981.
  • further processed products in particular boxes, boxes, packaging, crates and the like, which have been further processed from the products produced by the method according to the invention, still have sufficient or improved stability after exposure to moisture.
  • the invention therefore relates to a process for the continuous coating of a cellulose-based fibrous substrate web with fatty acid chloride, comprising the steps a) to c) as defined above and below.
  • At least one of the modules of the coating device is encapsulated and has an atmosphere of dry air with a relative humidity according to DIN EN 20187 of less than 20% RH, preferably less than 10% RH, particularly preferably less than 5% RH.
  • Modules 1-3 are naturally arranged in such a way that the cellulose-based fibrous substrate web can be guided continuously through the modules in the order specified.
  • Step a) takes place in the predrying module, coating step b) in the coating module and contact-free thermal aftertreatment in the thermal aftertreatment module.
  • Another object of the invention is the use of a cellulose-based fibrous substrate web, obtainable by the method according to the invention, for producing corrugated base paper, packaging paper, cardboard, cardboard, tissue paper, tissue, printing paper, writing paper, and combinations thereof.
  • a cellulose-based fibrous substrate web is understood to mean a cellulose-based substrate which is processed in web form and contains at least one fibrous material based on cellulose as the main constituent.
  • fibrous materials based on cellulose include cellulose fibers, cellulose, chemo-thermo-mechanical pulp (CTMP), thermo-mechanical pulp (TMP), deinked pulp (DIP), wood pulp, wood pulp, pulp with hydrophilic properties and a combination of this.
  • Typical fibrous substrate webs are paper, cardboard and cardboard.
  • the main component of the fibrous substrate webs is the fibrous material based on cellulose.
  • constituents of the fibrous substrate webs can include fillers, such as, for example, mineral and / or organic pigments, fine substances, in particular hemicelluloses, (shade) dyes, chemical additives, in particular retention aids, fixatives, contaminant scavengers, (dry) solidifiers, sizing agents, defoamers and other process aids.
  • fillers such as, for example, mineral and / or organic pigments, fine substances, in particular hemicelluloses, (shade) dyes, chemical additives, in particular retention aids, fixatives, contaminant scavengers, (dry) solidifiers, sizing agents, defoamers and other process aids.
  • Cellulose-based fibrous substrate webs can be uncoated or coated.
  • the coatings can typically be a coating with a conventional, starch-containing paper coating slip.
  • no cellulose-based fibrous substrate webs are used which have previously been treated with polyvinyl alcohol.
  • polyvinyl alcohol is also understood to mean partially hydrolyzed polyvinyl acetates, in particular those with a degree of hydrolysis> 80%.
  • fatty acid chlorides are understood to mean chlorides of aliphatic monocarboxylic acids which generally have at least 6, in particular at least 8, carbon atoms.
  • the monocarboxylic acids have 12 to 26 carbon atoms.
  • the fatty acids can be saturated or unsaturated.
  • they are fatty acid chlorides of saturated aliphatic monocarboxylic acids, in particular saturated aliphatic fatty acid chlorides with 12 to 26 C atoms, such as the fatty acid chlorides myristic acid, palmitic acid, margaric acid, stearic acid, arachic acid or behenic acid and mixtures thereof.
  • a liquid fatty acid chloride composition is understood to mean a fatty acid chloride composition which is flowable at processing temperatures and can be applied to the substrate using conventional application methods with the fatty acid chloride composition.
  • Typical viscosities of liquid fatty acid chloride compositions are in the range from 0.1 to 5000 mPa ⁇ s, in particular in the range from 0.2 to 50 mPa ⁇ s. The viscosities are determined in accordance with DIN53019 - 09/2008.
  • the pre-drying of the cellulose-based fibrous substrate web in step a) is carried out by conventional drying methods, for example by convection drying, in particular using impact jet dryers.
  • Another drying method is contact drying, for example with drying cylinders, on which the cellulose-based fibrous substrate web is guided.
  • the cellulose-based fibrous substrate web is adjusted to a moisture content according to EN ISO 638: 2008 maximum 2%, ie a dry content of at least 98% dried.
  • a pre-drying module with dry air preferably with a relative humidity according to DIN EN 20187 of less than 20% rh, in particular, is flowed through and the cellulose-based fibrous substrate web is in this way reduced to a moisture content according to EN ISO 638: 2008 of a maximum of 2%, ie a dry content of at least 98%.
  • the cellulose-based fibrous substrate web is predried in step a) to a moisture content according to EN ISO 638: 2008 of a maximum of 2% at most.
  • the cellulose-based fibrous substrate web typically has a moisture content of at least 0.1% or at least 0.2% or at least 0.5%.
  • Step a) is preferably carried out in an encapsulated atmosphere with a dry air stream with a relative humidity according to DIN EN 20187 of less than 20% RH, preferably less than 10% RH, particularly preferably less than 5% RH.
  • An encapsulated atmosphere is understood to mean an atmosphere which is insulated from the ambient atmosphere, ie is encapsulated and can therefore have other atmospheric conditions.
  • the encapsulated atmosphere is usually designed as an enclosure and a stream of lust flows through it.
  • the air flow has a humidity which is below the above-mentioned relative humidity and typically ranges from 0 to 20% RH.
  • the air flow used has a temperature in the range from 20 to 150 ° C. with a volume of 0.1 to 100 m 3 per 1 m 2 paper, or from 0.1 to 100 m 3 / h per 1 m 2 / h production speed, preferably at a volume of 1 to 10m 3 per 1m 2 paper.
  • the coating in step b) is preferably carried out in such a way that a total application in the range from 0.1 to 10% by weight, in particular 0.1 to 5% by weight, based on fatty acid chloride per g / m 2 basis weight of the cellulose based fibrous substrate web results.
  • the amount of fatty acid chloride applied is measured such that the fatty acid chloride content is in the range from 0.1 to 10% by weight, in particular in the range from 0.1 to 5% by weight, based on the dry mass of the cellulose based fibrous substrate web.
  • the liquid fatty acid chloride composition apply in an amount such that the amount of fatty acid chloride applied is in the range from 0.1 to 10 g / m 2 , in particular in the range from 0.1 to 5 g / m 2 .
  • the coating in step b) of the pre-dried cellulose-based fibrous substrate web in step a) with a liquid fatty acid chloride composition is carried out as an application of a layer of the liquid fatty acid chloride composition on the cellulose-based fibrous substrate web.
  • Conventional application methods are, in particular, roller application, roller application, curtain application, spray application, stroke application and combinations thereof.
  • the coating module has at least one device for applying the fatty acid chloride composition to the cellulose-based fibrous substrate web, e.g. a device for a roller application, roller application, curtain application, spray application or line application, in particular a device for a roller application.
  • a device for a roller application, roller application, curtain application, spray application or line application in particular a device for a roller application.
  • Step b) is preferably designed as a roller application method and in particular as an offset engraving method.
  • the liquid fatty acid composition is taken up by a metering roller rotating in a sump containing the liquid fatty acid chloride composition and transferred to a transfer roller which is in contact with the metering roller.
  • the liquid fatty acid chloride composition is transferred from the transfer roller to the predried cellulose-based fibrous substrate web, which is passed between the transfer roller and a fibrous substrate carrier roller.
  • other rollers can also be connected upstream of the transfer roller, which regulate the leveling of the application film.
  • the surface of the metering roller preferably has a multiplicity of depressions, in particular cups, in which the liquid fatty acid composition can be taken up.
  • the number and volume of the cells determines the amount of liquid fatty acid composition which can be taken up by the metering roller and then released to the transfer roller.
  • the amount that was dispensed from the metering roller onto the transfer roller determines the layer thickness of the liquid fatty acid composition applied to the transfer roller.
  • the layer thickness of the liquid fatty acid composition determines the amount that can be transferred from the transfer roller to the cellulose-based fibrous substrate web. Further parameters determining the transfer of liquid fatty acid composition are the diameter, peripheral speeds, distances and contact forces between the metering and / or transfer roller.
  • the coating in step b) is carried out using a roller application method, in particular an offset engraving method.
  • the coating in step b) of the cellulose-based fibrous substrate web predried in step a) is preferably carried out with the liquid fatty acid chloride composition at a relative atmospheric humidity according to DIN EN 20187 of less than 10% RH, particularly preferably less than 5% RH.
  • the main component of the liquid fatty acid chloride composition is a fatty acid chloride which is selected from aliphatic monocarboxylic acid chlorides having 6 to 26 carbon atoms, preferably having 16 to 20 carbon atoms and mixtures thereof.
  • the fatty acid chloride is selected from aliphatically saturated fatty acid chlorides having 6 to 26 carbon atoms, preferably having 16 to 20 carbon atoms and mixtures thereof.
  • the liquid fatty acid chloride composition contains at least 5% by weight of fatty acid chloride, preferably 50% by weight of fatty acid chloride, in particular at least 90% by weight of fatty acid chloride, in each case based on the total weight of the fatty acid chloride composition.
  • the liquid fatty acid chloride composition contains more than 95% by weight of fatty acid chloride, based on the total weight of the fatty acid chloride composition.
  • liquid fatty acid chloride composition contains less than 10% by weight, in particular less than 5% by weight, of organic solvents with a boiling point below 150 ° C.
  • Step b) is preferably carried out in an encapsulated atmosphere with a dry air stream with a relative air humidity according to DIN EN 20187 of less than 20% RH, preferably less than 10% RH, particularly preferably less than 5% RH.
  • the encapsulated atmosphere is achieved in particular through a housing through which an air stream flows.
  • the relative humidity of the airflow becomes the Do not exceed the above values and can also be lower.
  • the air flow used often has a temperature in the range from 10 to 80 ° C.
  • Step b) is preferably carried out at temperatures in the range from 10 to 150 ° C., in particular in the range from 20 to 120 ° C.
  • the cellulose-based fibrous substrate web will be tempered, e.g. to temperatures in the range from 40 to 120 ° C, in particular in the range from 50 to 100 ° C.
  • the thermal treatment in step c) of the cellulose-based fibrous substrate web coated with a liquid fatty acid chloride composition in step b) can be carried out with conventional non-contact or non-contact drying devices, such as, for example, radiation dryers and / or convection dryers.
  • the thermal treatment is preferably carried out with radiation dryers, in particular infrared radiation dryers.
  • the thermal aftertreatment module has at least one device for contactless or contactless drying, in particular at least one radiation dryer, and in particular at least one infrared radiation dryer. The following explanations relate both to step c) and to the aftertreatment module.
  • thermal aftertreatment with infrared radiation dryers is carried out at low air exchange rates in the range from 0 to 20 air changes per hour or in the range from 0 to 20 m 3 / h air volume flow per 1 m 3 dryer volume.
  • Infrared radiation drying typically uses radiation with wavelengths in the range from 780 to 5000 nm. Electrically and / or gas-heated radiators with an output in the range from 5 to 50 W / m 2 are usually used as radiators for radiation drying.
  • the radiation drying causes a reduction in the viscosity of the liquid fatty acid chloride composition applied, loss of substance in the fatty acid chloride composition due to evaporation due to low air exchange rates occurring only to a small extent if this takes place at all. With reduced viscosity, the liquid fatty acid chloride composition can better penetrate into the cellulose-based fibrous substrate web.
  • Step c) is preferably carried out in an encapsulated atmosphere with a dry air stream with a relative air humidity in accordance with DIN EN 20187 of less than 20% RH, preferably less than 10% RH, particularly preferably less than 5% RH.
  • the encapsulated atmosphere is achieved in particular through an enclosure.
  • the relative humidity of the air flow will generally not exceed the above values and can also be lower.
  • the air flow overflows Cellulose-based substrate web.
  • the cellulose-based substrate web has a temperature in the range from 20 to 120 ° C. with low air exchange rates in the range from 0 to 20 air changes per hour.
  • the coated and thermally treated cellulose-based fibrous substrate web obtained from step c) undergoes as a further step d) post-treatment in a dry air atmosphere with a relative atmospheric humidity according to DIN EN 20187 of less than 20% RH.
  • the cellulose-based fibrous substrate webs coated by the process according to the invention are used, for example, in the production of corrugated cardboard and are processed in particular into fruit / vegetable crates, stacking boxes, water-repellent / solid packaging boxes.
  • all paper types preferably packaging papers, in particular liner, kraft liner, test liner, corrugated material and Schrenz, are used as base papers to be coated with the fatty acid chloride composition.
  • tissue papers in particular with a basis weight in the range from 10 to 100 g / m 2
  • the papers can be coated or uncoated. If the papers are coated, they are in particular coatings made of materials that contain hydroxyl groups, for example a starch-containing paper coating.
  • the Figure 1 shows an enlarged section of the Figure 2 with modules used in the method according to the invention.
  • the cellulose-based fibrous substrate web is predried in a predrying module B, in particular to a dry content of less than 10% according to EN ISO 538: 2008.
  • a coating module C the pre-dried cellulose-based fibrous substrate web is coated with a liquid fatty acid chloride composition; in particular, a three-roll applicator unit is used for the coating according to the engraving process.
  • a first thermal aftertreatment module D is designed in particular as a radiation dryer and heats the cellulose-based fibrous substrate web coated with the liquid fatty acid chloride composition, in particular with infrared radiation.
  • the Figure 2 shows schematically a modular arrangement of the method according to the invention.
  • the cellulose-based fibrous substrate web passes through the modules listed below.
  • a processing module A is used to unwind the cellulose-based fibrous substrate web, in particular from a (paper) roll.
  • the cellulose-based fibrous substrate web is then subjected to predrying in the predrying module B.
  • the coating module C the predried cellulose-based fibrous substrate web is coated with a liquid fatty acid chloride composition and tempered in the first thermal aftertreatment module D.
  • a second thermal aftertreatment module E the coated cellulose-based fibrous substrate web is set to the temperature conditions desired for further processing.
  • the second thermal aftertreatment module E serves as a kind of lock to delimit a dry atmosphere in modules B to E from, for example, a humid ambient air atmosphere.
  • the arrangement of the second thermal aftertreatment module E is optional.
  • the coated cellulose-based fibrous substrate web is wound up in a winding module F.
  • modules B to E are supplied with a dry air supply G. After the dry air, starting from the dry air supply G, has flowed through the modules B to E, it is passed into the atmosphere via an air discharge J via one or more scrubber module (s) H, in which (s) residues of hydrochloric acid are / are washed out .
  • the rewinding module F is flown through with atmospheric air via an ambient air supply I, then through one or more scrubber module (s) H and then through the air discharge J into the atmosphere.
  • the Figure 3 schematically shows an embodiment of the coating module C according to the invention as a three-roll applicator.
  • the coating of a cellulose-based fibrous substrate web 7, in particular a paper, cardboard or cardboard web takes place in a contact mode according to the offset engraving method.
  • a liquid fatty acid chloride composition is conveyed into a drinking trough 4 from a storage container 5.
  • a metering roller 1 runs in the impregnating trough 4.
  • the metering roller 1 is, for example, a ceramic-coated, laser-engraved roller with a small specific cell volume in the range from 1 to 10 ⁇ m well depth.
  • the metering roller 1 conveys a certain amount of fatty acid chloride composition out of the impregnation trough 4 depending on the parameters set, such as the cell volume and the rotational speed, and transfers this to a transfer roller 2, whereby a layer of the fatty acid chloride composition with a specific layer thickness is located on the transfer roller 2 trains.
  • This layer of the fatty acid chloride composition is transferred from the transfer roller 2 as an application film 6 to the cellulose-based fibrous substrate web 7, the cellulose-based fibrous substrate web 7 being guided around a fibrous substrate carrier roller 3. Excess fatty acid chloride composition is collected in a drip pan 8 and passed into a waste container 9.
  • tallow fatty acid chloride 50/50 from BASF SE was used.
  • This fatty acid chloride composition consists of 50% by weight of palmitoyl chloride (CAS number: 112-67-4) and 50% by weight of stearoyl chloride (CAS number: 112-76-5).
  • the base paper used in the examples was a brown, unsized test liner from Thurpapier - Model Management AG in Weinfelden and had a basis weight of 130 g / m 2 and a Cobb 60 value of 159 g / m 2 .
  • palmitoyl chloride (CAS number: 112-67-4) from BASF SE was used.
  • a fatty acid chloride composition can be used which consists of 50% by weight palmitoyl chloride and 50% by weight stearoyl chloride (CAS number: 112-76-5).
  • the base paper used in the examples was a brown, unsized test liner from Thurpapier - Model Management AG in Weinfelden and had a basis weight of 130 g / m 2 and a Cobb 60 value of 159 g / m 2 .
  • the experimental setup 1 for the following examples 1-4 was as follows: The base paper was pre-dried to a dry content> 96% (according to EN ISO 638: 2008) using contact drying at 60 ° C and approx. 5% rh. At the same temperature and humidity, the dried raw paper was coated with fatty acid chloride using a roller applicator (ZIL2140 Zehnner Ink Lox) using the offset engraving process at a speed of 5 m / min. The engraving roller had 180 screens per cm at an angle of 45 ° and a specific cell volume of 3.8 cm 3 / m 2 . The contact pressure of the engraving roller on the transfer roller was 56 N / m.
  • the rubber transfer roller had a Shore-A hardness of 40 and was pressed against the paper substrate with a line force of 152 N / m.
  • the application weight was 1 to 3 g / m 2 .
  • the coated paper substrate was then thermally aftertreated with two Krelus IR radiators (G7-50-2.5) at 42 kW / m 2 for 12 seconds.
  • the raw paper was treated analogously to experimental setup 1, with the difference that the raw paper was pre-dried to a residual moisture content of 1.7% (according to EN ISO 638: 2008) by means of contact drying at 110 ° C. and approx. 5% rh.
  • the paper treated in this way then had a Cobb 60 value of 19 g / m 2 on the coated front side and a Cobb 60 value of 72 g / m 2 on the back side.
  • the treatment of the base paper with the fatty acid chloride was carried out analogously to experimental setup 1, with the difference that the base paper was not dried and had a moisture content of 5.9%.
  • the paper treated in this way had a Cobb 60 value of 20 g / m 2 on the coated front side and a Cobb 60 value of 86 g / m 2 on the back side.
  • the raw paper was treated with the fatty acid chloride analogously to experimental setup 1, with the difference that the paper was pre-dried for 1 min at 105 ° C. in a forced-air drying oven.
  • the paper treated in this way had a Cobbeo value of 18 g / m 2 on the coated front and a Cobb 60 value of 18 g / m 2 on the back.
  • the base paper was coated on a coating table from Erichsen GmbH with a doctor blade No. 2 and a coating speed of level 5 at 25 ° C. with a 20% strength aqueous polyvinyl alcohol solution (Mowiol 4-98, degree of hydrolysis> 98%) single-layer application of 5 g / m 2 coated.
  • the paper thus obtained was dried at 105 ° C. for 24 hours.
  • the treatment of the coated base paper with the fatty acid chloride was carried out on the side coated with polyvinyl alcohol in analogy to Example 3.
  • the paper treated in this way had a Cobbeo value of 4 g / m 2 on the coated front side and a Cobbeo value of 58 on the back side g / m 2 .

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  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Biochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Coating Apparatus (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Claims (12)

  1. Procédé pour le couchage continu d'une feuille continue d'un substrat de matière fibreuse à base de cellulose, à l'aide d'un chlorure d'acide gras, comprenant les étapes suivantes :
    a) préséchage d'une feuille continue d'un substrat de matière fibreuse à base de cellulose, jusqu'à une teneur en humidité selon EN ISO 638:2008 d'au plus 2 % ;
    b) couchage de la feuille continue d'un substrat de matière fibreuse à base de cellulose, préséchée dans l'étape a), avec une composition liquide de chlorure d'acide gras, pour une humidité relative de l'air selon DIN EN 20187 inférieure à 20 %HR, et à une température inférieure à la température d'ébullition de la composition liquide de chlorure d'acide gras ;
    c) traitement thermique sans contact de la feuille continue d'un substrat de matière fibreuse à base de cellulose, couchée, obtenue dans l'étape b).
  2. Procédé selon la revendication 1, dans lequel la composition liquide de chlorure d'acide gras contient en tant que constituant principal un chlorure d'acide gras qui est choisi parmi les chlorures d'acides monocarboxyliques aliphatiques ayant 6 à 26 atomes de carbone, de préférence 16 à 20 atomes de carbone, et les mélanges de ceux-ci.
  3. Procédé selon la revendication 2, dans lequel le chlorure d'acide gras est choisi parmi les chlorures d'acides gras saturés aliphatiques ayant 6 à 26 atomes de carbone, de préférence 16 à 20 atomes de carbone, et les mélanges de ceux-ci.
  4. Procédé selon l'une des revendications précédentes, dans lequel la composition liquide de chlorure d'acide gras contient au moins 5 % en poids d'un chlorure d'acide gras, par rapport au poids total de la composition de chlorure d'acide gras.
  5. Procédé selon l'une des revendications précédentes, dans lequel la composition liquide de chlorure d'acide gras contient plus de 95 % en poids d'un chlorure d'acide gras, par rapport au poids total de la composition de chlorure d'acide gras.
  6. Procédé selon l'une des revendications précédentes, dans lequel au moins l'une des étapes a) à c) est mise en œuvre dans une atmosphère confinée, avec un courant d'air sec présentant une humidité relative de l'air selon DIN EN 20187 inférieure à 20 %HR.
  7. Procédé selon l'une des revendications précédentes, dans lequel le couchage de l'étape b) est mis en œuvre à l'aide d'un procédé d'application au rouleau, en particulier un procédé par gravure offset.
  8. Procédé selon l'une des revendications précédentes, dans lequel le couchage de l'étape b) est mis en œuvre avec une quantité totale appliquée comprise dans la plage de 0,1 à 10 % en poids par rapport à la masse surfacique de chlorure d'acide gras, en g/m2, de la feuille continue d'un substrat de matière fibreuse à base de cellulose.
  9. Procédé selon l'une des revendications précédentes, dans lequel le traitement thermique, dans l'étape c), de la feuille continue d'un substrat de matière fibreuse à base de cellulose, couchée, est mis en œuvre par un traitement par un rayonnement, en particulier par séchage par un rayonnement infrarouge.
  10. Procédé selon l'une des revendications précédentes, dans lequel la feuille continue d'un substrat de matière fibreuse à base de cellulose, couchée et thermiquement traitée, obtenue dans l'étape c), subit en tant qu'étape supplémentaire d) un post-traitement dans une atmosphère d'air sec présentant une humidité relative de l'air selon DIN EN 20187 inférieure à 20 %HR.
  11. Dispositif de couchage pour le couchage continue d'une feuille continue d'un substrat de matière fibreuse à base de cellulose, à l'aide d'une composition liquide de chlorure d'acide gras selon l'une des revendications précédentes, comprenant :
    - un module de préséchage ;
    - un module de couchage, et
    - un module de post-traitement thermique,
    dans lequel au moins l'un des modules du dispositif de couchage est confiné, et présente une atmosphère d'air sec ayant une humidité relative de l'air selon DIN EN 20187 inférieure à 20 %HR.
  12. Utilisation d'une feuille continue d'un substrat de matière fibreuse à base de cellulose, pouvant être obtenue par un procédé tel que défini dans l'une des revendications 1 à 10, pour fabriquer un papier brut pour carton ondulé, un papier d'emballage, un carton, un carton mono- ou multicouche, un papier hygiénique, un papier mousseline, un papier d'impression, un papier d'écriture, et des combinaisons de ceux-ci.
EP15829002.3A 2014-08-06 2015-08-06 Procédé de revêtement en continu d'une bande de substrat fibreux à base de cellulose avec du chlorure d'acide gras Active EP3177408B1 (fr)

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PCT/IB2015/055961 WO2016020866A1 (fr) 2014-08-06 2015-08-06 Procédé de revêtement en continu d'une bande de substrat fibreux à base de cellulose avec du chlorure d'acide gras

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US (1) US20170241080A1 (fr)
EP (1) EP3177408B1 (fr)
JP (1) JP6636501B2 (fr)
KR (1) KR102193503B1 (fr)
CN (1) CN106573268B (fr)
BR (1) BR112017002040B1 (fr)
ES (1) ES2808674T3 (fr)
MX (1) MX2017001636A (fr)
PH (1) PH12017500194B1 (fr)
PL (1) PL3177408T3 (fr)
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PL3314058T3 (pl) * 2015-06-29 2020-04-30 Stora Enso Oyj Sposób hydrofobizacji podłoża celulozowego
KR102035571B1 (ko) * 2017-12-21 2019-11-26 한국기초과학지원연구원 친수성 표면의 방수화 처리 방법 및 친수성 표면의 방수처리용액
KR101974895B1 (ko) * 2018-10-04 2019-05-07 강원대학교산학협력단 압착 가열 기상 그라프팅 소수화 장치 및 이를 이용하여 제조한 내열수성 종이 및 유흡착 종이
SE543029C2 (en) * 2018-11-16 2020-09-29 Stora Enso Oyj Method for hydrophobizing a cellulose substrate by utilizing a fatty acid halide
SE543479C2 (en) * 2019-07-09 2021-03-02 Stora Enso Oyj Bio-barrier coated paperboard and laminates thereof
SE1951393A1 (en) * 2019-12-04 2021-06-05 Stora Enso Oyj Water-resistant cellulose-based substrate with improved repulpability
SE544899C2 (en) * 2020-02-21 2022-12-27 Stora Enso Oyj Water-resistant multilayered cellulose-based substrate
SE544101C2 (en) * 2020-05-13 2021-12-21 Stora Enso Oyj Water-resistant mineral-coated cellulose-based substrate grafted with fatty acid halide and method for its manufacturing
SE544175C2 (en) * 2020-06-24 2022-02-22 Stora Enso Oyj Water-resistant paper or paperboard
CN115997058A (zh) * 2020-08-13 2023-04-21 赛尔卢罗科技公司 用于酰化羟基化固体材料的方法
JP2023551342A (ja) * 2020-12-01 2023-12-07 セルロテック インコーポレイテッド スクロールヒドロキシル化材料のアシル化のためのプロセスおよび装置
FR3135980A1 (fr) * 2022-05-31 2023-12-01 Cellulotech Inc. Procédé d’acylation d’un matériau solide hydroxylé

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Publication number Publication date
BR112017002040B1 (pt) 2022-04-05
US20170241080A1 (en) 2017-08-24
PT3177408T (pt) 2020-07-24
PH12017500194A1 (en) 2017-06-28
EP3177408A4 (fr) 2018-04-11
KR102193503B1 (ko) 2020-12-22
PL3177408T3 (pl) 2020-11-02
ES2808674T3 (es) 2021-03-01
EP3177408A1 (fr) 2017-06-14
KR20170039179A (ko) 2017-04-10
MX2017001636A (es) 2017-09-01
CN106573268B (zh) 2019-11-19
CN106573268A (zh) 2017-04-19
JP6636501B2 (ja) 2020-01-29
WO2016020866A1 (fr) 2016-02-11
BR112017002040A2 (pt) 2017-12-26
PH12017500194B1 (en) 2017-06-28
JP2017530855A (ja) 2017-10-19

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