EP3762542A1 - Oberflächenleimungsmittel für ein papiererzeugnis, seine verwendung, papiererzeugnis und verfahren zum beschichten eines papiererzeugnisses - Google Patents

Oberflächenleimungsmittel für ein papiererzeugnis, seine verwendung, papiererzeugnis und verfahren zum beschichten eines papiererzeugnisses

Info

Publication number
EP3762542A1
EP3762542A1 EP19711499.4A EP19711499A EP3762542A1 EP 3762542 A1 EP3762542 A1 EP 3762542A1 EP 19711499 A EP19711499 A EP 19711499A EP 3762542 A1 EP3762542 A1 EP 3762542A1
Authority
EP
European Patent Office
Prior art keywords
surface sizing
sizing agent
acrylic acid
mass
paper product
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
EP19711499.4A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bernhard Wiedner
Rudolf Seidler
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.)
Giesecke and Devrient Currency Technology GmbH
Original Assignee
Giesecke and Devrient Currency Technology GmbH
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 Giesecke and Devrient Currency Technology GmbH filed Critical Giesecke and Devrient Currency Technology GmbH
Publication of EP3762542A1 publication Critical patent/EP3762542A1/de
Pending legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/33Synthetic macromolecular compounds
    • D21H17/34Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/36Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H17/00Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20Macromolecular organic compounds
    • D21H17/33Synthetic macromolecular compounds
    • D21H17/34Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H19/00Coated paper; Coating material
    • D21H19/10Coatings without pigments
    • D21H19/14Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H19/00Coated paper; Coating material
    • D21H19/36Coatings with pigments
    • D21H19/44Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/60Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H21/00Non-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
    • D21H21/14Non-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
    • D21H21/16Sizing or water-repelling agents
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H21/00Non-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
    • D21H21/14Non-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
    • D21H21/22Agents rendering paper porous, absorbent or bulky
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21HPULP 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
    • D21H23/00Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22Addition to the formed paper
    • D21H23/52Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56Rolls

Definitions

  • the invention relates to a surface sizing agent for a Toileter Weg- nis, a paper product, which is particularly designed as a banknote paper, and which comprises the surface sizing agent.
  • the invention also relates to a use of the surface sizing agent and a method for coating a paper he certificate.
  • a paper product which is used in particular as a security paper having one or more layers and / or security elements, which are arranged in or on one or at one of the layers o- or in or at several layers is to reduce the capillarity, that is, to close the pores of the paper product, and to fix fillers contained in the paper product and thus prevent dusting thereof, provide the surface of the paper product with a sizing, a so-called surface sizing.
  • the surface sizing in addition to the above-mentioned functions, also has the property of refining the paper product, whereby the strength properties of the paper test certificate, such as e.g. its pick resistance and wet rub resistance.
  • a good surface sizing is also intended to improve the printability of the paper product, for example in a subsequent printing and finishing process.
  • sizing agents are known on a different basis from the prior art. For the most part, the surface sizing agents contain polymeric compounds, since these bind the pores of paper and paper close very well.
  • DE 4040347 C2 discloses a process for sizing cotton-based or linen-based paper or based on a paper made of other vegetable fibers, using a lubricant containing a low-viscosity polyvinyl alcohol. Furthermore, carboxymethylcellulose (CMC), starch or alginates may be added to the sizing agent.
  • CMC carboxymethylcellulose
  • a disadvantage of sizing agents based on polyvinyl alcohol is their property of enclosing fibrous materials. The fiber materials are thus no longer accessible to the printing ink in a subsequent dyeing process, for example in a printing process.
  • DE 000003742330 A1 discloses an anionic surface sizing agent for paper in the form of an aqueous colloidal solution of a salt of a copolymer consisting of (meth) acrylic acid, (meth) acrylic ester of a C 10 to C 22 fatty alcohol, styrene, N, N Dimethylaminoethyl acrylate or methacrylate, methyl (meth) acrylate and isobutyl (meth) acrylate is known. Due to the high proportion of acrylic acid-based monomers, this surface sizing agent forms a good surface film on paper. However, the porosity of a paper coated with the surface sizing agent is not sufficiently reduced.
  • DE 000003731434 A1 discloses surface sizing agents for paper and paper-like materials which comprise aqueous or aqueous-alcoholic alkali, amine or ammonium salt solutions of copolymers of maleic anhydride and diisobutylene and optionally one or more vinyl monomers. These surface sizing agents also do not have sufficient pore-closing properties, so that the same disadvantages as disclosed above for DE 000003742330 A1 result.
  • the object of the present invention is to provide a surface sizing agent which fills the capillaries of paper or paper products and thereby preserves or improves the printability of the paper or paper product.
  • a further object of the present invention is to specify a paper product which is distinguished by very good resistance, high strength and good printability.
  • a further object of the present invention is to provide a method for coating a paper product which is simple to implement without great technical complexity, fills the capillaries of the paper product and thus printing the paper product to produce a permanently stable color film, or generally a finishing film, allows.
  • the invention provides a surface sizing agent for a paper product comprising at least one polyvinyl alcohol, a dispersion comprising at least one acrylic acid-based polymer and / or at least one acrylic acid-based copolymer, at least one crosslinking agent for the acrylic acid-based polymer and / or or acrylic acid-based copolymer and at least one solvent.
  • a surface sizing agent is understood as meaning a preparation which has substantially no color-giving properties and therefore contains as far as possible no pigments and / or fillers such as are customary for conventional paper-based coating compositions.
  • the surface sizing according to the invention preferably does not comprise any pigments and / or fillers.
  • Commercially available coating compositions are due to their composition, which has just a high proportion of pigments and fillers, not suitable to fill the pores of a paper product, or to reduce the capillarity of the paper product, while improving the printability. Rather, the coating compositions are present on the surface of the paper product without effecting substantial anchoring in the pores of the paper.
  • the surface sizing agent according to the invention is in the form of a dispersion.
  • the surface sizing agent according to the invention is used for surface sizing for paper products, in particular for papers, and among these, for example, security paper, such as banknote paper and the like, which contain fibers and in particular contain cellulose-based fibers, and contains at least one polyvinyl alcohol.
  • security paper such as banknote paper and the like
  • the polyvinyl alcohol is not substantially limited.
  • polyvinyl alcohol is understood to mean that one or more polyvinyl alcohols may be present, the polyvinyl alcohols being, for example, in their chemical structure, such as their chain length, or in one or more physical properties, such as For example, if several polyvinyl alcohols are used, the specified requirements and properties apply to each individual polyvinyl alcohol contained in the surface sizing agent according to the invention.
  • Suitable polyvinyl alcohols are, for example, the products Kuraray Poval 10-98, Kuraray Poval 28-99, Kuraray Poval 23-88, Kuraray Poval 26-88, Kuraray Poval 32-88, Kuraray Poval 40-88, Kuraray Poval 47-88, Kuraray Poval 23-95 from Kuraray, Jp.
  • the surface sizing agent according to the invention contains a dispersion comprising at least one polymer based on acrylic acid and / or at least one acrylic acid-based copolymer. In the simplest case, this may be an acrylic acid polymer or a methacrylic acid polymer, ie a homopolymer of (meth) acrylic acid.
  • the surface sizing agent according to the invention may also comprise at least one acrylic acid-based copolymer. This means that in addition to (meth) acrylic acid units, a further monomer unit or several further monomer units are seen before, for example, for hydrophobing of the copolymer.
  • the term "at least one acrylic acid-based polymer and / or at least one acrylic acid-based copolymer" analogously applies to those already cited for the at least one polyvinyl alcohol: it may contain an acrylic acid-based polymer or an acrylic acid-based copolymer; a plurality of acrylic acid-based polymers may be included, or may include a plurality of acrylic acid-based copolymers or mixtures of one or more acrylic acid-based polymers with one or more acrylic-based copolymers may be included in the surface sizing agent of the present invention fulfill the properties or functions described herein.
  • the acrylic acid-based polymer and / or the acrylic acid-based copolymer enables formation of a network on the surface of the paper product as well as with the polyvinyl alcohol.
  • a polymer network is formed, which allows a fixation of the polymer mixture on the paper product.
  • an interpenetrating network is formed between the polyvinyl alcohol and the acrylic acid-based polymer and / or the copolymer based on acrylic acid, by means of which a good fixation of the polymers on the paper product and thus a high degree of filling of the pores and capillaries of the polymer Paper product can be provided.
  • the at least one acrylic acid-based polymer and / or the acrylic acid-based copolymer also prevents the fibers of the paper product from being surrounded by the polyvinyl alcohol owing to its crosslinking and penetration of the polyvinyl alcohol network, so that in addition to high strength of the paper product a good and lasting printability of the same is obtained.
  • the crosslinking agent provided for crosslinking serves mainly to crosslink the acrylic acid-based polymer and / or acrylic acid-based copolymer. In other words, this means that the crosslinking agent reacts in particular with the carboxyl groups of the acrylic acid-based polymer and / or the acrylic acid-based copolymer.
  • the applied layer (color layer or in general: Finishing layer) is characterized by a durable resistance on the paper product. This also improves the washing resistance and wet creasing properties of the processed paper product.
  • the surface sizing agent according to the invention is therefore distinguished on the one hand by very good pores and capillaries-occluding properties and on the other hand enables a very good and permanent printability of a paper product treated with the surface sizing agent while at the same time providing good strength and service properties of the treated paper product.
  • the Oberflä chenschleinungsmittel invention thus also provides a good primer for printing inks and other applications, which opens up diverse fürsdorfkei th.
  • the printing of paper, which he is equipped with the inventive surface sizing by means of engraving printing method leads to significantly reduced color bursts in the end result at the same time reduced and thus paper gentle contact pressure.
  • the polyvinyl alcohol has a degree of saponification of at least 97 mol% and more preferably of at least 98 mol%.
  • a further improvement of the capillary and pore-sealing properties can be obtained by a particularly suitable viscosity of the polyvinyl alcohol.
  • a particularly suitable viscosity of the polyvinyl alcohol thus has a 4% aqueous solution of polyvinyl alcohol at 20 ° C, a viscosity measured according to DIN 53015 2001: 2, in a range of 5 bis 35 mPa s and preferably from 9 to 30 mPa s, on. If the viscosity of the polyvinyl alcohol is below 35 mPa s, the flowability of the surface sizing agent present as a dispersion can be improved, which is conducive to capillary action. Above 35 mPa s, the dispersibility of the polyvinyl alcohol can be reduced.
  • the polyvinyl alcohol then tends to precipitate out of the dispersion as a colloidal phase.
  • a viscosity of at most 35 mPa.s is therefore preferred. If the viscosity is below 5 mPa s, the handling of the surface sizing agent may be deteriorated. Eventually, the penetration capacity of the surface sizing agent into the pores and capillaries of a paper will be increased, but in the processing of the top sizing agent it could also result in dripping or runoff from the site of application with reduced pores and capillaries. In light of the advantages and disadvantages to be weighed, therefore, a viscosity of the polyvinyl alcohol in a range of 9 to 30 mPa ⁇ s is particularly advantageous.
  • the property of closing capillaries and pores of a paper product increases with the content of polyvinyl alcohol in the heatlei mungsmittel. At too high levels, however, a negative Ef effect of the enclosure of the fiber material of the paper product may occur, whereby the printability of the paper product, in particular with ink, is reduced.
  • the viscosity of the surface sizing agent is increased by higher levels of Polyvi nylalkohol, which, as stated above, for example, may deteriorate the storage stability of surgicalnleimungsmit means.
  • the total mass of polyvinyl alcohol, based on the total mass of the surface sizing agent is 1.5 to 6% by weight.
  • Particularly advantageous is the total mass of the polyvinyl alcohol 2.5 to 3.5% by mass, whereby a particularly good dispersion gability of the polyvinyl alcohol with at the same time very good flow properties and thus very good pores and capillaries filling properties can be obtained.
  • the acrylic acid-based polymer and / or the acrylic acid-based copolymer is a hydrophobized polymer and / or copolymer.
  • Acrylic acid-based copolymers which comprise acrylate units and styrene units have proven to be particularly suitable.
  • the copolymerization with styrene units also has the advantage that a very close meshed network of the crosslinked acrylic acid-based copolymer can be obtained, whereby the polyvinyl alcohol further contained in the surface sizing agent is particularly efficient at encasing the fiber materials due to the interpenetrating polymer network formation Surface size treated paper product is gehin changed.
  • acrylic acid monomers which also includes methacrylic acid monomers
  • styrenic monomers allows for a very smooth and scratch-resistant film formation on the application surface, which is also characterized by a certain elasticity, whereby a cracking in the polymer film can be prevented.
  • the total amount of dispersion comprising at least one acrylic acid-based polymer and / or at least one acrylic acid-based copolymer, based on the total mass of the surface sizing agent, 2 to 7% by mass and in particular 3 to 5.5% by mass .
  • Levels of acrylic acid based polymer and / or acrylic acid based copolymer of less than 2% by weight may in some cases be insufficient to form an interpenetrating polymer network.
  • contents of more than 7% by weight may adversely affect the dispersibility of the acrylic acid-based polymer and / or acrylic acid-based copolymer.
  • Particularly suitable amounts of acrylic acid-based polymer and / or acrylic acid-based copolymer are therefore in a range of 3 to 5.5% by weight.
  • the dispersion comprising at least one acrylic acid-based polymer and / or at least one acrylic acid-based copolymer preferably comprises 20-60% solids, more preferably 50% solids per mole of acrylic acid-based polymer and / or acrylic acid-based copolymer.
  • Acronal 310 S from BASF is preferably suitable as the dispersion.
  • a particularly good and stable crosslinking of the acrylic acid-based polymer and / or acrylic acid-based copolymer is possible in particular when the crosslinking agent reacts with the carboxyl groups of the polymer or copolymer.
  • Crosslinking agents which are selected from the group consisting of: aziridines, carbodiimides and polyisocyanates have proven particularly advantageous in this sense.
  • the crosslinking agents can be used individually or in combination, and in any desired mixing ratios.
  • Carbodiimides are particularly preferred here because of their good availability and very good dispersibility.
  • a particularly good and close-meshed crosslinking can advantageously be achieved by the total mass of crosslinking agent, based on the total mass of the acrylic acid-based polymer and / or copolymer, being from 5 to 20% by mass and in particular from 8 to 15% by mass.
  • a high degree of crosslinking coupled with very good dispersibility and thus also high stability of the surface sizing agent during storage is furthermore possible by the advantageous embodiment in which the total amount of crosslinking agent, based on the total mass of the surface sizing agent, is 0.5 to 2% by mass. and in particular 0.8 to 1.2 mass% be contributes.
  • a particularly balanced property profile of pore and capillary closing properties on the one hand and high printability on the other hand with simultaneously high dispersion stability of the surface sizing agent can preferably be achieved by a mass ratio of the polyvinyl alcohol to the dispersion comprising at least one on acrylic acid based polymer and / or at least one acrylic acid-based copolymer greater than 1 and in particular greater than 1.2.
  • the solvent is preferably water. Further, in particular with water at room temperature freely miscible solvents can be added. These include, in particular, low molecular weight alcohols such as ethanol and propanol, but also ethylene glycols and propylene glycols. For the above reasons, water is preferably contained as the sole solvent.
  • the total mass of solvent is 75 to 95% by mass.
  • the lower the content of solvent the higher the risk of settling or blocking of the polymers of the surface-conducting agent, for example during storage of the surface-conducting agent.
  • contents of solvents of more than 95% by weight may lead to the outflow of the surface sizing agent from the site of application and are therefore less preferred.
  • Particularly advantageous in the light of a very good dispersibility of the surface sizing with very good pores and capillaries filling properties is the Ge total mass of solvent 80 to 90% by mass.
  • the surface sizing agent preferably further contains at least one plasticizer.
  • plasticizers are smaller molecules which integrate into the polymer network or intervene between the polymer chains.
  • Plasticizers which are selected from polyalcohols, in particular glycerin, have proven to be particularly suitable.
  • neopentyl alcohol, trimethylolpropane, ethylene glycol, di- and triethylene glycol and polyethylene glycol are preferably used.
  • the Bezier availability of a treated with the surface sizing agent Textiler- product not adversely affect, as well as to achieve sufficient de strength of treated with the surface sizing paper product is advantageously the total mass of plasticizer, based on the total mass of heatleimungsmit means, 0.5 to 10 mass% and in particular 1.5 to 5 mass%.
  • the surface sizing agent is characterized by very good pores and capillaries of fibrous paper products filling properties and also by a very good printability or processability by means of other applications.
  • the total mass of fillers and pigments is less than 3% by weight and in particular less than 0.5% by weight.
  • the heatnlei tion contains no fillers and / or pigments.
  • the paper product is provided with the surface-conducting agent described above, which means that at least a part of a surface of the paper product is finished with the surface sizing agent. is equipped.
  • the paper product is completely, ie on both sides of the paper product, equipped with the surface sizing agent.
  • the paper product is impregnated with surface sizing
  • the paper product can be any paper, in particular security paper, such as banknotes and the like
  • a fiber-containing material is used, cellulose fibers, in particular cotton fibers, being used as the preferred fibers, the paper product having good strength due to the coating of the paper product with the surface sizing agent, and the pores and capillaries of the paper product being filled so that substantially no pores or capillaries are exposed on the surface of the paper product.
  • the paper product according to the invention preferably has is an air permeability of 10 to 35 ml / min.
  • the paper product is characterized by a flat surface with good surface strength, which can serve as a very good primer for an applied printing ink or finishing layer.
  • the printability of the paper product for example, by means of color printing, or the application ability of a finishing layer is improved due to the formed in or on the Textiler certificate interpenetrating polymer network of Polyvi nylalkoholketten and chains of the acrylic acid-based polymer and copolymer
  • a paint to be applied or other finishing preparation can be applied to the fibers of the paper product and anchored there permanently, but does not spread in any pores or capillaries, which are substantially filled with polyvinyl alcohol, so that, for example, color contours can be formed sharply. NEN.
  • from the at least one based on acrylic acid polymer and / or based on acrylic acid based on part of the interpenetrating polymer network also prevents washing off the applied paint and / or finishing preparation.
  • the advantages, advantageous properties and embodiments of the paper product according to the invention reference is additionally made to the statements on the surface sizing agent according to the invention.
  • the advantages, advantageous effects and developments of the surface sizing agent according to the invention also find application to the paper product according to the invention.
  • a method for coating a paper certificate comprises a step of contacting a surface of a paper product with a surface sizing agent as disclosed above.
  • the surface sizing agent can be applied only partially or vollflä chig on one or more surfaces of the paper product.
  • the method of applying the surface sizing agent is not limited.
  • the paper product can be soaked with the surface sizing agent, or else the surface sizing agent is brushed or sprayed onto the desired application area.
  • the paper product is impregnated with the surface sizing. This is followed by drying and crosslinking of the upper surface sizing agent, possibly under the action of heat.
  • the crosslinking is based in particular on the formation of a polymer network of the acrylic acid-based polymer and / or of the acrylic acid-based polymer Copolymer with the crosslinking agent contained in the surface sizing agent.
  • the method can be used to produce a paper product coated with surface sizing agent, which is distinguished by high strength, closed pores and capillaries and very good printability, for example in a color printing process or finishing process.
  • the process is simple, without high technical complexity and thus cost feasible.
  • the PVA used was Poval 10/98, available from Kuraray, Jp. was produced.
  • As the crosslinking agent a carbodiimide-based crosslinking agent of the manufacturer Stahl, Holland (Permutex XR-5577) was used.
  • Glycerol acts as a plasticizer.
  • urea can also be added. Water served as the sole solvent.
  • the chemical composition of the surface sizing agent could be analyzed by means of FT-IR spectroscopy, whereby essentially bands of the carbonyl groups of the acrylic acid-based copolymer and bands of the OH groups of the polyvinyl alcohol were apparent.
  • the surface sizing agent prepared in Example 1 was used to coat both sides of a paper (made by means of a circular sieve made of 100% cotton fibers, basis weight 85 to 95 g / m 2 ).
  • the processing of the surface sizing agent was unproblematic and the application even without dripping noses.
  • the Oberflä chenleimungsmittels a low porosity level of the paper he could be targeted. In other words, the pores and capillaries of the piers were closed.
  • the paper was characterized by a very good Fes activity in the double fold test and in terms of an acting breaking load, which also showed a very good surface strength.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
EP19711499.4A 2018-03-09 2019-03-08 Oberflächenleimungsmittel für ein papiererzeugnis, seine verwendung, papiererzeugnis und verfahren zum beschichten eines papiererzeugnisses Pending EP3762542A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018001940.4A DE102018001940A1 (de) 2018-03-09 2018-03-09 Oberflächenleimungsmittel für ein Papiererzeugnis, seine Verwendung, Papiererzeugnis und Verfahren zum Beschichten eines Papiererzeugnisses
PCT/EP2019/000073 WO2019170287A1 (de) 2018-03-09 2019-03-08 Oberflächenleimungsmittel für ein papiererzeugnis, seine verwendung, papiererzeugnis und verfahren zum beschichten eines papiererzeugnisses

Publications (1)

Publication Number Publication Date
EP3762542A1 true EP3762542A1 (de) 2021-01-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19711499.4A Pending EP3762542A1 (de) 2018-03-09 2019-03-08 Oberflächenleimungsmittel für ein papiererzeugnis, seine verwendung, papiererzeugnis und verfahren zum beschichten eines papiererzeugnisses

Country Status (4)

Country Link
EP (1) EP3762542A1 (zh)
CN (1) CN111836929A (zh)
DE (1) DE102018001940A1 (zh)
WO (1) WO2019170287A1 (zh)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022127341A1 (de) 2022-10-18 2024-04-18 Giesecke+Devrient Currency Technology Gmbh Oberflächen-Leimungsmittel für ein Sicherheitspapier, Verfahren zur Oberflächenleimung eines Sicherheitspapiersubstratmaterials, Sicherheitspapier und Wertdokument

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