EP3202979B1 - Papier d'emballage de liquide - Google Patents

Papier d'emballage de liquide Download PDF

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Publication number
EP3202979B1
EP3202979B1 EP16154285.7A EP16154285A EP3202979B1 EP 3202979 B1 EP3202979 B1 EP 3202979B1 EP 16154285 A EP16154285 A EP 16154285A EP 3202979 B1 EP3202979 B1 EP 3202979B1
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EP
European Patent Office
Prior art keywords
paper
iso
kraft
kraft paper
multilayer material
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.)
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Application number
EP16154285.7A
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German (de)
English (en)
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EP3202979A1 (fr
Inventor
Fredrik Nordström
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Billerudkorsnas AB
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Billerudkorsnas 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.)
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Publication date
Priority to EP16154285.7A priority Critical patent/EP3202979B1/fr
Application filed by Billerudkorsnas AB filed Critical Billerudkorsnas AB
Priority to RU2018125441A priority patent/RU2696469C1/ru
Priority to SG11201806439YA priority patent/SG11201806439YA/en
Priority to CN201780009181.6A priority patent/CN108699776B/zh
Priority to PCT/EP2017/052120 priority patent/WO2017134088A1/fr
Priority to MX2018009388A priority patent/MX2018009388A/es
Priority to BR112018015785-6A priority patent/BR112018015785B1/pt
Priority to MYPI2018702641A priority patent/MY187341A/en
Publication of EP3202979A1 publication Critical patent/EP3202979A1/fr
Priority to ZA2018/04570A priority patent/ZA201804570B/en
Application granted granted Critical
Publication of EP3202979B1 publication Critical patent/EP3202979B1/fr
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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing 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
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • 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
    • 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
    • D21H27/30—Multi-ply

Definitions

  • the invention relates to paper for liquid packaging.
  • paperboard In the field of liquid packaging, paperboard is the most common cellulosic fiber based material. However, for some types of liquid packages, paper is used instead of paperboard as the carrier.
  • Liquid packages based on paper are common in emerging markets, such as China and India.
  • a common liquid packaging product is a pillow-shaped pouch.
  • the paper used as the carrying medium for pillow pouches often has a high strength in relation to its thickness, which has been considered important due to rough handling during transporting and to prevent rupture if the pouches are dropped.
  • Paperboard generally has higher strength than paper, but cannot be used because it is not flexible enough (too stiff) for the converting process forming the pillow pouches. Further, paperboard, which typically has at least two times higher grammage than the paper used for the pillow pouch application, is not a cost-effective option.
  • the paper grades conventionally used for the pillow pouch application are for reasons of strength and purity typically produced using a strong bleached softwood Kraft pulp (NSBK) that has been refined using high consistency refining followed by intensive low consistency refining. Further, such paper grades are normally produced on a multi-cylinder Kraft paper machine that is integrated with the pulp mill, which means only never-dried pulp is used.
  • NBSK bleached softwood Kraft pulp
  • WO99/02772 discloses a method for making Kraft paper, wherein a sulphate pulp is subjected to HC refining only or to HC refining in combination with LC beating, the LC beating, if applicable, being carried out at a relatively low energy supply, and wherein a strengthening agent, especially a charged polymer, is subsequently added to the stock, preferably at two separate points in the process, in a total amount of at least 8 kg per tonne of paper.
  • a Kraft paper with a tensile energy absorption index of 2.5-3.5 J/g at a porosity (Gurley) of less than 10 seconds and a valve sack made of one or more layers of said kraft paper are provided.
  • WO00/14333 discloses a paper or paperboard laminate composed of at least one bulk-promoting layer, here termed the bulk layer, and on at least one side of the bulk layer at least one secondary layer, secondary layer and bulk layer being joined to one another directly or indirectly over basically the whole of their surfaces facing one another.
  • 40-95 % of the bulk layer consists of cellulose fibres with a freeness of 550-950 ml CSF, the secondary layer/layers has/have a greater density than the bulk layer, and the laminate has a bending stiffness index higher than 2.5 Nm 7 /kg 3 , but less than 14 Nm 7 /kg 3 , calculated as a geometric mean value for machine and transverse direction.
  • a method of producing said paper or paperboard laminate is also disclosed.
  • the inventor has realized that one drawback of the above-mentioned paper grades conventionally used for the pillow pouch application is that the surface roughness of the printing side is too high, which means that some printing requirements cannot be met. Further, the inventor has realized that the pouches resulting from the conventional paper grades often are too floppy/flabby and can be difficult to handle. For example, it may be difficult to open and/or pour from the prior art pouches without spilling.
  • the present disclosure presents a Kraft paper that, without an increased thickness, has decreased surface roughness (improving printability) and increased bending resistance (reducing floppiness/flabbiness).
  • a key factor in producing the Kraft paper of the present disclosure is the use of a machine glaze (MG) cylinder or a Yankee cylinder (YC) in the drying.
  • a Kraft paper having a grammage of 65-85 g/m 2 according to ISO 536.
  • the grammage is 70-85 g/m 2 , such as 70-80 g/m 2 .
  • a typical grammage for the pillow pouch application is 75 g/m 2 .
  • the Kraft paper of the present disclosure is prepared from a furnish comprising at least 50 % (by dry weight) Kraft pulp.
  • the furnish comprises at least 75 % (by dry weight), such as at least 90 % (by dry weight), Kraft pulp.
  • the Kraft paper of the present disclosure is preferably produced from 100 % Kraft pulp. Kraft paper provides the strength that is needed for the pillow application.
  • the Bendtsen roughness of at least one side of the paper is below 300 ml/min according to ISO 8791-2. Preferably, it is below 250 ml/min, such as below 200 ml/min. Such a roughness may be obtained by using a MG cylinder or a Yankee cylinder as further discussed below.
  • the roughness in question is below 150 ml/min, preferably below 100 ml/min, more preferably below 70 ml/min. Roughness values below 150 ml/min may be obtained by also calendering the paper, as further discussed below.
  • the side of the paper having the lowest surface roughness is normally referred to as the printing side.
  • the printing side is also the side of the paper that contacts the MG cylinder or Yankee cylinder.
  • the paper of the first aspect is further defined by a quotient obtained by dividing the geometric bending resistance of the paper (measured according to ISO 2493) by the thickness of the paper (measured according to ISO 534).
  • the quotient is at least 0.65 mN/ ⁇ m. It is preferably at least 0.72 mN/ ⁇ m, more preferably at least 0.78 mN/ ⁇ m. This means that he bending stiffness of the present disclosure does not come at the expense of a higher thickness.
  • the bending resistance of the Kraft paper of the first aspect is higher in the machine direction (MD) than in the cross direction (CD).
  • the bending resistance (ISO 2493-1) of the paper of the first aspect is typically 90-120 mN in the MD and 50-75 mN in the CD.
  • the geometric bending resistance of the paper of the first aspect is typically 65-90 mN.
  • the thickness (ISO 534) of the paper of the first aspect is typically 85-105 ⁇ m, such as 90-100 ⁇ m.
  • the bending resistance in the machine direction (MD) of the paper according to ISO 2493-1 divided by the thickness of the paper according to ISO 534 may for example be at least 0.90 mN/ ⁇ m, such as at least 1.00 mN/ ⁇ m.
  • the bending resistance in the cross direction (CD) of the paper according to ISO 2493-1 divided by the thickness of the paper according to ISO 534 may for example be at least 0.50 mN/ ⁇ m, such as at least 0.60 mN/ ⁇ m.
  • the geometric bending resistance index of the paper of the first aspect may for example be at least 180 Nm 7 /kg 3
  • the Kraft paper of the first aspect typically has a lower stretchability in the cross direction (CD) than a Kraft paper produced on a multi-cylinder Kraft paper machine.
  • CD cross direction
  • the latter Kraft paper typically has a stretchability in the CD of about 8 %
  • the Kraft paper of the first aspect may have a stretchability in the CD of 2-5 %. Stretchability is preferably measured according to ISO 1924-3.
  • the Kraft paper of the first aspect is relatively strong.
  • the tensile strength may be at least 6 kN/m, such as 6-10 kN/m, in the machine direction (MD).
  • the tensile strength may be at least 3 kN/m, such as at least 3.5 kN/m, such as 3.5-5.5 kN/m.
  • the paper of the first aspect may comprise a dry strength agent, such as starch.
  • the dry strength agent may for example be cationic.
  • cationic dry strength agents are cationic starch and cationic polyacrylamide (C-PAM).
  • C-PAM cationic polyacrylamide
  • the paper may also comprise an anionic microparticle, such as silica. Cationic starch and silica is a preferred combination.
  • the Kraft paper of the first aspect may comprise inorganic filler, such as clay.
  • the amount of inorganic filler may be 1-7 g/m 2 , such as 3-6 g/m 2 . It follows that the Kraft paper of the first aspect may have a substantial ash content, such as an ash content of 1-7 %, preferably 2-6 %, according to ISO 2144. If the amount of inorganic filler is too high, the strength of the paper may be insufficient.
  • an inorganic filler such as clay increases the opacity of the Kraft paper of the first aspect.
  • the opacity according to ISO 2471 of the Kraft paper of the first aspect may be at least 70 %, such as at least 75 %.
  • the Kraft paper of the first aspect is preferably bleached. Accordingly, it may have a brightness according to ISO 2470-1 of at least 70 %, such as 70-100 %. Preferably, the brightness according to ISO 2470-1 is at least 75 %, such as 75-100 %.
  • the Kraft paper according to the first aspect may comprise hydrophobic size.
  • hydrophobic size examples include rosin size, alkylketene dimer (AKD) size and alkyl succinic anhydride (ASA) size.
  • rosin size When rosin size is added to the paper, it is preferred to also add alum.
  • the Kraft paper of the first aspect comprises AKD, rosin size and alum.
  • Suitable amounts of AKD, rosin size and alum are discussed below.
  • a multilayer material comprising:
  • the multilayer material of the second aspect is primarily intended for the formation of pillow pouches, e.g. for liquids.
  • the printing side is typically printed, which means that the first coating layer covers the printed printing side.
  • the first coating layer is preferably transparent.
  • Many plastic coatings, such as PE or PP coatings (discussed below), are transparent.
  • the first coating layer may be printed.
  • the thickness and the bending resistance increase.
  • the quotient obtained by dividing the geometric bending resistance (measured according to ISO 2493) by the thickness (measured according to ISO 534) may be at least 1.22 mN/ ⁇ m, preferably at least 1.30 mN/ ⁇ m.
  • the coating layers also increase the grammage, which may be 135-175 g/m 2 (measured according to ISO 536) for the multilayer material of the second aspect.
  • the coat weight of the first coating layer may for example be 5-25 g/m 2 , such as 9-18 g/m 2 .
  • the first coating layer may comprise polyethylene (PE) or polypropylene (PP).
  • the first and/or the second coating layer may comprise sublayers.
  • the second coating layer may comprise a gas barrier sublayer.
  • the gas barrier sublayer may for example be composed of EVOH, polyamide or aluminium.
  • Such an aluminium sublayer is often referred to as an aluminium foil, which may have a thickness of 5-10 ⁇ m, such as 6-8 ⁇ m.
  • the gas barrier sublayer may be sandwiched between two plastic sublayers, such as two sublayers of PE or PP.
  • the second coating layer comprises at least three sublayers.
  • Each of the plastic sublayers may for example have a coat weight of 5-25 g/m 2 , such as 9-18 g/m 2 .
  • the multilayer material of the second aspect may be referred to as a laminate.
  • a pillow pouch composed of a multilayer material according to the second aspect.
  • the pillow pouch normally has a longitudinal seal adhering two overlapping ends of the paper material to each other to form a lap seal.
  • the longitudinal seal may be a fin seal.
  • the pillow pouch normally has a first end sealed by a fin seal and a second end sealed by a fin seal.
  • the pillow pouch of the third aspect typically has a volume of 50-1200 ml.
  • a preferred volume is 70-1000 ml, such as 100-500 ml.
  • the pillow pouch of the third aspect may be filled with a liquid, preferably a liquid for drinking.
  • the pillow pouch of the third aspect is typically produced by unwinding multilayer material according to the second aspect from a reel followed by sterilization (e.g. by treatment with hydrogen peroxide) of the material.
  • sterilization e.g. by treatment with hydrogen peroxide
  • the sterilized material is then formed into a tube, which is filled with a liquid. Finally, sealing and cutting into individual packages containing the liquid is performed.
  • the method of the fourth aspect comprises:
  • the furnish provided in step a) is preferably composed of never-dried pulp.
  • the hardwood pulp that may form part of the furnish provided in step a) is preferably hardwood Kraft pulp.
  • the pulp(s) of the furnish provided in step a) is/are preferably bleached.
  • the method of the fourth aspect may comprise the step(s) of bleaching the pulp(s).
  • the bleaching step(s) may comprise treatment with chlorine dioxide and hydrogen peroxide, which results in fibers that do not give the packaged liquid an unwanted taste or odour.
  • the fibers of the furnish are refined. Refining may be carried out to the extent that a Schopper Riegler (SR) value of 23-30, such as 24-28, measured according to ISO 5267-1 is obtained. If the furnish is composed of two pulps, the pulps may be co-refined or refined separately.
  • SR Schopper Riegler
  • softwood Kraft pulp constitutes 50-100 %, such as 55-90 % or 55-70 %, of the dry weight of the furnish provided in step a) and hardwood pulp, such as hardwood Kraft pulp, constitutes 0-50 %, such as 10-45 % or 30-45 %, of the dry weight of the furnish provided in step a).
  • never-dried bleached softwood Kraft pulp constitutes 55-70 % and never-dried bleached hardwood Kraft pulp constitutes 30-45 % of the dry weight of the furnish provided in step a).
  • An effect of including hardwood pulp is that a smoother printing side is obtained.
  • Hydrophobic size such as rosin size, AKD and/or ASA
  • rosin size can be added to the furnish. If rosin size is added, it is preferred to also add alum.
  • the weight ratio of rosin size to alum may be between 1.5:1 and 1:1.5.
  • the point(s) of addition for the hydrophobic size and the alum is/are preferably upstream the dilution of step b).
  • the total amount of rosin size added to the furnish may for example be 1-8 kg/ton dry fiber, such as 3-8 kg/ton dry fiber.
  • rosin size is added to the furnish in a total amount of 2-5 kg/ton dry fiber and AKD is added to the furnish in a total amount of 0.1-1 kg/ton dry fiber, such as 0.2-0.7 kg/ton dry fiber.
  • At least one strength agent such as starch, may be added to the furnish, preferably before the dilution of step b).
  • the dry strength agent may for example be cationic and examples of cationic dry strength agents are cationic starch and cationic polyacrylamide (C-PAM).
  • C-PAM cationic polyacrylamide
  • the method comprises addition of a cationic strength agent, it may also comprise addition of an anionic microparticle, such as silica. It is preferred to add both cationic starch and silica to the furnish before the dilution of step b).
  • the total amount of starch, such as cationic starch, added to the furnish may for example be 3-9 kg/ton dry fiber, such as 4-8 kg/ton dry fiber.
  • the total amount of anionic microparticle may for example be 0.05-0.50 kg/ton dry fiber.
  • Inorganic filler may be added to the furnish, preferably before the dilution of step b).
  • a preferred example of inorganic filler is clay.
  • the total amount of inorganic filler added to the furnish may for example be 10-50 kg/ton dry fiber, preferably 25-45 kg/ton dry fiber.
  • the method further comprises the step of:
  • the calender used for step f) may be of soft nip, hard nip or long-nip belt type.
  • a method of preparing a multilayer material according to the second aspect comprising the steps of:
  • Printing on the printing side of the Kraft paper is preferably carried out between steps i) and ii). Alternatively, it can be carried out after step ii).
  • Step ii) is sometimes referred to as lamination.
  • a furnish composed of 60 % (by dry weight) never-dried bleached softwood Kraft pulp and 40 % (by dry weight) never-dried bleached hardwood Kraft pulp was prepared.
  • the furnish was refined at a consistency of 3.5 % using three refiners arranged in series.
  • the energy supply was 35 kWh/ton dry pulp in the first refiner, 35 kWh/ton dry pulp in the second refiner and 40 kWh/ton dry pulp in the third refiner.
  • the Schopper Riegler (SR) value of the furnish was 26 according to ISO 5267-1.
  • alum in an amount of 5.5 kg/ton dry fiber and rosin size in an amount of 5.5 kg/ton dry fiber were added at a pH of 5.5 (ISO 6588-1).
  • cationic starch was added in an amount of 6 kg/ton together with 0.15 kg/ton dry fiber of silica (Eka NP 442).
  • the chemicals were added to the thick stock, i.e. prior to the dilution of the furnish and thus prior to the head box.
  • the furnish was then diluted prior to the head box.
  • a paper web was formed and dewatered on a fourdriner wire section.
  • the dry matter content of the web was increased from about 20% to about 35 % in a press section.
  • the paper was pre-dried before entering an MG cylinder for final drying.
  • An advantage of MG cylinder drying compared to multi-cylinder drying is that the printing side of the paper is adhered to the surface of the MG cylinder and thereby restrained during final drying. Thereby, the resulting paper has a high tensile stiffness, a low strain at break and a smoother surface compared to paper produced with unrestrained drying (e.g. multi-cylinder drying).
  • MG Kraft paper Multi-cylinder-dried Kraft paper
  • Table 1 Property Unit MG Kraft paper Multi-cylinder-dried Kraft paper Grammage g/m 2 75 72 Pulp Fibers g/m 2 ⁇ 71 72 Clay g/m 2 ⁇ 3.5 Moisture % 5.5 7.5 Thickness ⁇ m 95 104 Gurley air resistance s 30 62 Tensile Strength, MD kN/m 8.2 8.1 Tensile Strength, CD kN/m 4.1 4.7 Strain, MD % 1.7 2.4 Strain, CD % 3.3 8.0 TEA, MD J/m 2 94 125 TEA, CD J/m 2 98 250 Tear Strength, MD mN 620 767 Tear Strength, CD mN 721 724 Bending resistance, MD mN 106.5 86 Bending resistance, CD mN 58.5 40.5 Bending resistance, Geo mN 79 59 Bending resistance,
  • Table 1 shows that the bending resistance in both MD and CD is higher for the MG Kraft paper than for the prior art Kraft paper even though the MG Kraft paper has a lower amount of fibers and is thinner than the prior art Kraft paper. Table 1 further shows that the tensile strength values of the MG Kraft paper are satisfactory despite the addition of clay.
  • the most striking difference between the MG Kraft paper and the prior art Kraft paper is the roughness of the printing side, which is above 600 ml/min for the prior art Kraft paper, but only about 150 ml/min for the MG Kraft paper.
  • Multilayer materials were prepared by laminating the MG Kraft paper and the prior art Kraft paper, respectively, with a first coating on the printing side and a second coating on the backside.
  • the first coating was a 12 g/m 2 PE film.
  • the second coating was an aluminum foil sandwiched between two sublayers of 12 g/m 2 PE film.
  • Table 2 shows that the bending resistance in both MD and CD is higher for the multilayer material of the MG Kraft paper than for the prior art multilayer material even though the former is thinner.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Bag Frames (AREA)

Claims (15)

  1. Papier Kraft ayant un grammage compris entre 65 et 80 g/m2 conformément à ISO 536, dans lequel la rugosité de Bendtsen d'au moins un côté du papier est inférieure à 300 mL/min conformément à ISO 8791-2 et la résistance à la flexion géométrique du papier conformément à ISO 2493-1 divisée par l'épaisseur du papier conformément à ISO 534 est d'au moins 0,65 mN/µm, de préférence au moins 0,72 mN/µm, tel qu'au moins 0,78 mN/µm,
    dans lequel la résistance à la flexion géométrique est mesurée en utilisant un angle de flexion de 15° et une longueur de portée de test de 10 mm.
  2. Papier Kraft selon la revendication 1, qui est décoloré.
  3. Papier Kraft selon l'une quelconque des revendications précédentes, qui comprend une charge inorganique, telle que de l'argile, dans une quantité telle que la teneur en cendres du papier Kraft est comprise entre 1 et 7 %, telle que comprise entre 2 et 6 %.
  4. Papier Kraft selon l'une quelconque des revendications précédentes, dans lequel la rugosité de Bendtsen conformément à ISO 8791-2 d'au moins un côté du papier est inférieure à 250 mL/min, telle qu'inférieure à 200 mL/min, telle qu'inférieure à 150 mL/min, telle qu'inférieure à 100 mL/min, telle qu'inférieure à 70 mL/min.
  5. Papier Kraft selon l'une quelconque des revendications précédentes, qui comprend une colle hydrophobe.
  6. Papier Kraft selon la revendication 5, qui comprend de la colle d'alun et résinique.
  7. Papier Kraft selon l'une quelconque des revendications précédentes, qui comprend de l'amidon.
  8. Matériau multicouche comprenant :
    une couche de papier ayant un côté d'impression et un arrière, la couche de papier étant le papier Kraft selon l'une quelconque des revendications précédentes;
    une première couche de revêtement ménagée sur le côté d'impression ; et
    une seconde couche de revêtement ménagée sur l'arrière.
  9. Matériau multicouche selon la revendication 8, dans lequel la résistance à la flexion géométrique du papier conformément à ISO 2493-1 divisée par l'épaisseur du matériau multicouche conformément à ISO 534 est inférieure à 1,20 mN/µm, de préférence au moins 1,30 mN/µm.
  10. Matériau multicouche selon la revendication 8 ou la revendication 9, dans lequel la première et la seconde couches de revêtement comprennent du polyéthylène ou du polypropylène.
  11. Matériau multicouche selon l'une quelconque des revendications 8 à 10, dans lequel le grammage du matériau multicouche est compris entre 135 et 175 g/m2 conformément à ISO 536.
  12. Sachet coussin composé du matériau multicouche selon l'une quelconque des revendications 8 à 11.
  13. Procédé permettant de produire le papier Kraft selon l'une quelconque des revendications 1 à 7, comprenant
    a) la fourniture d'une composition de fabrication de pâte de résine Kraft ou d'un mélange de pâte de résine Kraft et de pâte de bois dur ;
    b) la dilution de la composition de fabrication avant une caisse de tête et ensuite la formation et l'égouttage d'une bande de papier sur une section de câble, telle qu'une section de câble Fourdrinier, qui peut être équipée d'un formage hybride permettant un égouttage amélioré ;
    c) le pressage à l'état humide de la bande de papier de l'étape b) dans une section de presse, qui comprend de préférence de nombreuses interstices de pressage ;
    d) le pré-séchage de la bande de papier de l'étape c) ; et
    e) le séchage supplémentaire de la bande de papier préséché de l'étape d) en utilisant
  14. Procédé selon la revendication 13, comprenant en outre l'étape de :
    f) calandrage du papier sec de l'étape e) tel qu'un côté d'impression du papier résultant possède une rugosité de Bendtsen conformément à ISO 8791-2 inférieure à 100 mL/min, telle qu'inférieure à 70 mL/min.
  15. Procédé selon l'une quelconque des revendications 13 ou 14, dans lequel la pâte de résine Kraft et la pâte de bois dur sont blanchies.
EP16154285.7A 2016-02-04 2016-02-04 Papier d'emballage de liquide Active EP3202979B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP16154285.7A EP3202979B1 (fr) 2016-02-04 2016-02-04 Papier d'emballage de liquide
SG11201806439YA SG11201806439YA (en) 2016-02-04 2017-02-01 Liquid packaging paper
CN201780009181.6A CN108699776B (zh) 2016-02-04 2017-02-01 液体包装纸
PCT/EP2017/052120 WO2017134088A1 (fr) 2016-02-04 2017-02-01 Papier d'emballage de liquide
RU2018125441A RU2696469C1 (ru) 2016-02-04 2017-02-01 Бумага для упаковки жидкостей
MX2018009388A MX2018009388A (es) 2016-02-04 2017-02-01 Papel para empacar liquidos.
BR112018015785-6A BR112018015785B1 (pt) 2016-02-04 2017-02-01 Papel kraft, material de camadas múltiplas, bolsa de travesseiro e método de produzir o papel kraft
MYPI2018702641A MY187341A (en) 2016-02-04 2017-02-01 Liquid packaging paper
ZA2018/04570A ZA201804570B (en) 2016-02-04 2018-07-09 Liquid packaging paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16154285.7A EP3202979B1 (fr) 2016-02-04 2016-02-04 Papier d'emballage de liquide

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EP3202979A1 EP3202979A1 (fr) 2017-08-09
EP3202979B1 true EP3202979B1 (fr) 2018-08-22

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EP (1) EP3202979B1 (fr)
CN (1) CN108699776B (fr)
BR (1) BR112018015785B1 (fr)
MX (1) MX2018009388A (fr)
MY (1) MY187341A (fr)
RU (1) RU2696469C1 (fr)
SG (1) SG11201806439YA (fr)
WO (1) WO2017134088A1 (fr)
ZA (1) ZA201804570B (fr)

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KR101968044B1 (ko) 2018-07-09 2019-06-19 한솔제지 주식회사 수분 및 가스 차단성 종이의 제조방법
ES2921887T3 (es) 2019-08-27 2022-09-01 Billerudkorsnaes Ab Una bolsa de papel
SE545614C2 (en) * 2020-09-01 2023-11-14 Stora Enso Oyj A method for producing a multilayer machine glazed paper comprising highly refined cellulose fibers and a multilayer machine glazed paper produced
SE545733C2 (en) * 2020-09-01 2023-12-27 Stora Enso Oyj A method for producing a machine glazed paper comprising microfibrillated cellulose and a machine glazed paper
EP3974580A1 (fr) * 2020-09-28 2022-03-30 BillerudKorsnäs AB Produit en papier pour l'emballage tubulaire
EP4067568A1 (fr) * 2021-03-31 2022-10-05 Mondi AG Papier d'emballage
FI4234810T3 (fi) * 2022-02-28 2024-05-16 Billerud Ab Publ Fluorikemikaaleja sisältämätön rasvansulkupaperi
EP4299831A1 (fr) * 2022-06-30 2024-01-03 Billerud Aktiebolag (publ) Papier frictionné sur machine et procédé de préparation du papier frictionné sur machine
EP4353901A1 (fr) * 2022-10-12 2024-04-17 Billerud Aktiebolag (publ) Papier extensible à haute densité

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ZA201804570B (en) 2021-06-30
BR112018015785A2 (pt) 2019-01-02
WO2017134088A1 (fr) 2017-08-10
CN108699776A (zh) 2018-10-23
MX2018009388A (es) 2019-06-06
MY187341A (en) 2021-09-22
RU2696469C1 (ru) 2019-08-01
SG11201806439YA (en) 2018-08-30
EP3202979A1 (fr) 2017-08-09
BR112018015785B1 (pt) 2022-09-13
CN108699776B (zh) 2021-12-24

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