EP4234810B1 - Fluorchemisch freies mehrträgerpapier - Google Patents

Fluorchemisch freies mehrträgerpapier Download PDF

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Publication number
EP4234810B1
EP4234810B1 EP22159305.6A EP22159305A EP4234810B1 EP 4234810 B1 EP4234810 B1 EP 4234810B1 EP 22159305 A EP22159305 A EP 22159305A EP 4234810 B1 EP4234810 B1 EP 4234810B1
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EP
European Patent Office
Prior art keywords
paper
barrier paper
composition
starch
iso
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.)
Active
Application number
EP22159305.6A
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English (en)
French (fr)
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EP4234810A1 (de
Inventor
Lars WAHLSTRÖM
Per Iversen
Erik WESTERHOLM
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.)
Billerud AB
Original Assignee
Billerud AB
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 Billerud AB filed Critical Billerud AB
Priority to EP22159305.6A priority Critical patent/EP4234810B1/de
Priority to FIEP22159305.6T priority patent/FI4234810T3/fi
Priority to EP22167403.9A priority patent/EP4234811A1/de
Priority to PCT/EP2023/054574 priority patent/WO2023161351A1/en
Publication of EP4234810A1 publication Critical patent/EP4234810A1/de
Application granted granted Critical
Publication of EP4234810B1 publication Critical patent/EP4234810B1/de
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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
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D21H17/29—Starch cationic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the 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
    • 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
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/42—Paper being at least partly surrounded by the material on both sides
    • 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 disclosure relates to the field of grease barrier paper, in particular grease-barrier paper to be used in the fast food industry.
  • a fluorochemical-free grease barrier paper comprising a base paper, wherein:
  • the present disclosure provides a fluorochemical-free grease barrier paper.
  • This paper comprises a base paper, which preferably is a machine glazed paper (often referred to as an "MG paper").
  • MG paper machine glazed paper
  • at least 75% (by dry weight) of the pulp used to form the base paper is virgin kraft pulp.
  • at least 90% (by dry weight) of the pulp used to form the base paper is virgin kraft pulp.
  • the kraft pulp may be a mixture of hardwood kraft pulp and softwood kraft pulp. Such a mixture is preferred since the inclusion of hardwood fibres reduces porosity (and thereby improves grease resistance) whereas the inclusion of softwood fibres increases strength, which improves runnability (since the paper is of low grammage and hence susceptible to breakage, e.g. during wind-up, if the strength is too low).
  • the dry weight ratio of softwood fibers to hardwood fibers may be between 3:1 and 1:1. In a preferred embodiment, the dry weight ratio is between 2:1 and 1.2:1. In a more preferred embodiment, it is between 1.8:1 and 1.3:1.
  • a balanced ratio of softwood fibres to hardwood fibres is particularly beneficial when the ash content of the paper is high. The reason for this is that high ash content reduces strength. Ash content and strength values are further discussed below.
  • a first side of the base paper is impregnated with a first composition comprising oxidized starch, dextrin, a crosslinker and a wax, such as alkyl ketene dimer (AKD). Further, a second side of the base paper is impregnated with a second composition comprising oxidized starch, dextrin and a crosslinker.
  • a first composition comprising oxidized starch, dextrin, a crosslinker and a wax, such as alkyl ketene dimer (AKD).
  • a second side of the base paper is impregnated with a second composition comprising oxidized starch, dextrin and a crosslinker.
  • the barrier paper become less brittle when it is impregnated rather than only coated with the oxidized starch/dextrin mixture.
  • the type of dextrin is maltodextrin.
  • crosslinker The reason for including a crosslinker is to reduce the moist sensitivity, which is important given that the food to be contacted by the paper is often moist.
  • a preferred type of crosslinker is a polyamide-epichlorohydrin (PAE) resin.
  • the amount of the crosslinker in the first composition may be 1-9 %, such as 3-7 %, based on the dry weight of starch.
  • the amount of starch is the combined amounts of oxidized starch and dextrin in the first composition.
  • the amount of the crosslinker in the second composition may be 1-9 %, such as 3-7 %, based on the dry weight of starch.
  • the amount of starch is the combined amounts of oxidized starch and dextrin in the second composition.
  • the reason for including a wax, such as AKD, in the first composition is that it reduces tack when in contact with hot, greasy food, such a newly fried hashbrowns.
  • the inventors have carried out trials showing unacceptable tack to hashbrowns when no wax is included. These trials also showed that the addition of a non-wax chemical, i.e. an EAA polymer (Michem ® Prime 4983), did not solve the tack problem. It was not until AKD was added the tack could be avoided. Further, the paper became soggier in contact with the hash browns when the EAA polymer was used than when AKD was used. The sogginess problem was observed independent of the amount of EAA polymer in the composition (five different EAA polymer concentrations ranging from 5 pph to 25 pph were tested).
  • no wax such as no AKD
  • the second composition is included in the second composition.
  • the reason for not including wax in this composition is that the second side is not contacting the food (it faces outwards when used in a bag) and that wax typically reduces friction, which is often undesired considering convertability and handleability of the barrier paper.
  • the amount of wax, such as AKD, in the first composition is 1-9 %, such as 1-8 %, such as 2-7 %, based on the dry weight of starch.
  • the amount of starch is the combined amounts of oxidized starch and dextrin in the first composition.
  • the wax is AKD in amount of 2-6 %, most preferably 2-4 %, based on the amount of starch.
  • the amount of AKD is 3 pph (i.e. about 3%). 5 pph (i.e. about 5%) has also been used in full-scale trials, but did not produce significantly better results than 3 pph.
  • the ash content is 3-9 %, such as 5-9 %, such as 5-8 %.
  • a relatively high ash content is the consequence of addition of clay.
  • the reason for adding clay is to increase opacity, which is appreciated by consumers. However, clay reduces strength, which impairs runnability. Softwood pulp and cationic starch is typically included in the pulp to compensate for this strength reduction.
  • the opacity is at least 47%, such as at least 53%.
  • opacity is measured according to ISO 2471:2008. Strength values are discussed below.
  • Starch i.e. oxidized starch + dextrin
  • Starch is typically the main component of the first composition.
  • at least 75%, such as at least 80%, of the dry weight of the first composition is starch.
  • starch i.e. oxidized starch + dextrin
  • starch is typically the main component of the second composition.
  • at least 80%, such as at least 85%, of the dry weight of the second composition is starch.
  • the barrier paper becomes brittle, which may result in breakage during winding or converting. If the applied amount is too low, the oil barrier properties may be insufficient.
  • the first composition is applied in an amount of 0.4-1.5 g/m 2 , such as 0.6-1.4 g/m 2 (as dry).
  • the second composition is preferably applied in an amount of 0.4-1.5 g/m 2 , such as 0.6-1.4 g/m 2 (as dry).
  • the basis weight of the barrier paper may be 30-65 g/m 2 , such as 35-55 g/m 2 , preferably 35-45 g/m 2 . Higher basis weights are not needed (neither economically motivated) for the intended application. In the present application, basis weight is measured according to ISO 536:2019.
  • the barrier paper preferably has a Gurley value (measured according to ISO 5636-5:2013) of at least 400 s, such as at least 500 s.
  • Gurley value measured according to ISO 5636-5:2013
  • the Bendtsen porosity measured according to ISO 5636-3:2013
  • the barrier paper may for example be in the range of 10-50 ml/min.
  • the burst strength is at least 100 kPa and/or the burst strength index is at least 3.3 kN/g, such as 3.3-5.0 kN/g.
  • the burst strength is measured according to ISO 2758:2014.
  • the tear strength in the machine direction is at least 150 mN and/or the tear strength index in the MD is at least 4.0 mNm 2 / g, such as 4.0-6.5 mNm 2 /g.
  • the tear strength in the cross direction (CD) is at least 155 mN and/or the tear strength index in the CD is at least 4.3 mNm 2 /g, such as 4.3-6.8 mNm 2 /g.
  • tear strength is measured according to ISO 1974:2012.
  • At least one side (typically the first side) of the barrier paper has a Cobb 60 s value of less than 20 g/m 2 , such as less than 19 g/m 2 , such as less than 18.5 g/m 2 .
  • both sides of the barrier paper have a Cobb 60 s value below 21 g/m 2 , such as below 20 g/m 2 .
  • the Cobb 60 s value is measured according to ISO 535:2014.
  • the second side of the barrier paper is intended to be facing outwards in a package. Hence, this side is often printed. Low surface roughness typically improves the quality of the print. Accordingly, the Bendtsen surface roughness (measured according to ISO 8791-2:2013) of the second side is preferably below 200 ml/min, such as below 150 ml/min, such as below 120 ml/min. The lower limit for the Bendtsen surface roughness (ISO 8791-2:2013) of the second side may for example be 50 ml/min.
  • the Bendtsen surface roughness (ISO 8791-2:2013) of the first side may for example be in the range of 200-500 ml/min.
  • the second side has a lower Bendtsen surface roughness value (ISO 8791-2:2013) than the first side.
  • ISO 8791-2:2013 Bendtsen surface roughness value
  • Such an embodiment may be obtained by selecting the wire side as the second side.
  • the second side is typically the glazed side.
  • the tensile strength in the MD of the barrier paper is preferably above 3.5 kN/m. Further, the tensile index in the MD of the barrier paper is preferably in the range of 90-145 Nm/g.
  • the tensile strength in the CD of the barrier paper is preferably above 1.8 kN/m. Further, the tensile index in the CD of the barrier paper is preferably in the range of 50-100 Nm/g, such as 50-85 Nm/g.
  • tensile strength is measured according to ISO 1924-3:2005.
  • the palm kernel oil breakthrough (measured according to ISO 16532-1) of the first side of the paper may be above 15 min, preferably above 18 min, such as above 20 min.
  • the palm kernel oil breakthrough (measured according to ISO 16532-1) of both sides is above 15 min, preferably above 18 min, such as above 20 min.
  • the present invention further provides a package, such as a bag, for serving food, which package comprises at least one wall comprising the barrier paper discussed above.
  • Said food may for example be fried or otherwise greasy food.
  • a furnish comprising softwood kraft fibres and hardwood kraft fibres in a 60:40 dry weight ratio was provided.
  • the furnish contained clay in such an amount that the final ash content of the paper was 6.8%.
  • the furnish contained 3.7 kg/tonne dry fibre of cationic starch, 2.5 kg/tonne dry fibre of rosin size and retention polymer.
  • NaOH and alum was added to adjust the pH to 5.6.
  • the furnish was refined to such an extent that the paper (before impregnation) had a Gurley value of 87 s.
  • An MG paper was formed from the furnish on a full-scale paper machine equipped with a Yankee cylinder.
  • the degree of drying was such that the paper web leaving the Yankee cylinder had a moisture content of 12%.
  • This paper web having a moisture content of 12% was impregnated on both sides in a (full-scale) film press.
  • the upper side of the paper web was impregnated with a first water-based composition comprising:
  • the wire side (glazed side) of the paper web was impregnated with a second water-based composition comprising:
  • the applied dry amount of the first water-based composition was 0.96 g/m 2 .
  • the applied dry amount of the second water-based composition was 0.86 g/m 2 .
  • the impregnated paper was then dried such that it had 6.2% moisture when rolled up.
  • the basis weight at roll-up was 38 g/m 2 . Further properties are provided in table 1 below.
  • Bags was formed from the paper of table 1. In the bags, the upper side was facing inwards. Freshly fried hash browns were placed in the bags. After containing the hash browns, the paper of the bags was evaluated and found to have a satisfactory grease barrier, comparatively low sogginess and no tack issues.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Claims (15)

  1. Fluorchemikalienfreies Fettbarrierepapier, bestehend aus einem Rohpapier, wobei:
    eine erste Seite des Rohpapiers mit einer ersten Zusammensetzung imprägniert ist, die oxidierte Stärke, Dextrin, einen Vernetzer und ein Wachs, wie etwa Alkylketendimer (AKD), aufweist; und
    eine zweite Seite des Rohpapiers mit einer zweiten Zusammensetzung imprägniert ist, die oxidierte Stärke, Dextrin und einen Vernetzer aufweist,
    wobei das Dextrin Maltodextrin ist.
  2. Barrierepapier nach Anspruch 1, wobei das Rohpapier eine Mischung aus Hartholzfasern und Weichholzfasern aufweist.
  3. Barrierepapier nach Anspruch 2, wobei das Trockengewichtsverhältnis von Hartholzfasern zu Weichholzfasern zwischen 1:1 und 1:3 liegt.
  4. Barrierepapier nach Anspruch 3, wobei das Trockengewichtsverhältnis von Hartholzfasern zu Weichholzfasern zwischen 1:1,2 und 1:2,0, beispielsweise zwischen 1:1,3 und 1:1,8, liegt.
  5. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei der Vernetzer ein PAE-Harz ist.
  6. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei die Menge des Vernetzers in der ersten Zusammensetzung 1-9 %, beispielsweise 3-7 %, bezogen auf das Trockengewicht der Stärke, beträgt.
  7. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei die Menge des Vernetzers in der zweiten Zusammensetzung 1-9 %, beispielsweise 3-7 %, bezogen auf das Trockengewicht der Stärke, beträgt.
  8. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei die Menge an AKD in der ersten Zusammensetzung 1-9 %, beispielsweise 1-8 %, beispielsweise 2-7 %, bezogen auf das Trockengewicht der Stärke, beträgt.
  9. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei mindestens 75 %, beispielsweise mindestens 80 %, des Trockengewichts der ersten Zusammensetzung Stärke ist.
  10. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei mindestens 80 %, beispielsweise mindestens 85 %, des Trockengewichts der zweiten Zusammensetzung Stärke ist.
  11. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei die Trockenmenge der ersten Zusammensetzung 0,4-1,5 g/m2, beispielsweise 0,6-1,4 g/m2, beträgt.
  12. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei die Trockenmenge der zweiten Zusammensetzung 0,4-1,5 g/m2, beispielsweise 0,6-1,4 g/m2, beträgt.
  13. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei der Aschegehalt 3-9 %, beispielsweise 5-9 %, beispielsweise 5-8 %, beträgt.
  14. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei das gemäß ISO 536:2019 gemessene Flächengewicht 30-65 g/m2, beispielsweise 35-55 g/m2, beträgt.
  15. Barrierepapier nach einem der vorhergehenden Ansprüche, wobei der gemäß ISO 5636-5:2013 gemessene Gurley-Wert mindestens 400 s, beispielsweise mindestens 500 s, beträgt.
EP22159305.6A 2022-02-28 2022-02-28 Fluorchemisch freies mehrträgerpapier Active EP4234810B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22159305.6A EP4234810B1 (de) 2022-02-28 2022-02-28 Fluorchemisch freies mehrträgerpapier
FIEP22159305.6T FI4234810T3 (fi) 2022-02-28 2022-02-28 Fluorikemikaaleja sisältämätön rasvansulkupaperi
EP22167403.9A EP4234811A1 (de) 2022-02-28 2022-04-08 Verfahren zur herstellung eines imprägnierten papiers
PCT/EP2023/054574 WO2023161351A1 (en) 2022-02-28 2023-02-23 A fluorochemical-free grease-barrier paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22159305.6A EP4234810B1 (de) 2022-02-28 2022-02-28 Fluorchemisch freies mehrträgerpapier

Publications (2)

Publication Number Publication Date
EP4234810A1 EP4234810A1 (de) 2023-08-30
EP4234810B1 true EP4234810B1 (de) 2024-02-21

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Application Number Title Priority Date Filing Date
EP22159305.6A Active EP4234810B1 (de) 2022-02-28 2022-02-28 Fluorchemisch freies mehrträgerpapier
EP22167403.9A Pending EP4234811A1 (de) 2022-02-28 2022-04-08 Verfahren zur herstellung eines imprägnierten papiers

Family Applications After (1)

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EP22167403.9A Pending EP4234811A1 (de) 2022-02-28 2022-04-08 Verfahren zur herstellung eines imprägnierten papiers

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EP (2) EP4234810B1 (de)
FI (1) FI4234810T3 (de)
WO (1) WO2023161351A1 (de)

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CN107988845A (zh) * 2017-12-29 2018-05-04 安徽宏实光机电高科有限公司 一种纳米二氧化硅疏油增强复合壳聚糖施胶剂的制备方法
CN110093806A (zh) * 2019-05-06 2019-08-06 浙江科技学院 一种无涂层数码喷墨转移印花原纸及其生产方法
CN110158364A (zh) * 2019-05-30 2019-08-23 浙江恒达新材料股份有限公司 一种低定量涂布型食品包装原纸及其制备方法
CN112080964B (zh) * 2020-09-10 2022-10-18 将军烟草集团有限公司济南包装材料分公司 一种防渗油涂布液及制备方法与应用

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