EP3202979A1 - Flüssigkeitsverpackungsmaterial - Google Patents
Flüssigkeitsverpackungsmaterial Download PDFInfo
- Publication number
- EP3202979A1 EP3202979A1 EP16154285.7A EP16154285A EP3202979A1 EP 3202979 A1 EP3202979 A1 EP 3202979A1 EP 16154285 A EP16154285 A EP 16154285A EP 3202979 A1 EP3202979 A1 EP 3202979A1
- Authority
- 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.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title description 13
- 238000004806 packaging method and process Methods 0.000 title description 4
- 239000002655 kraft paper Substances 0.000 claims abstract description 90
- 239000000123 paper Substances 0.000 claims abstract description 77
- 238000005452 bending Methods 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims description 36
- 239000011247 coating layer Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
- 238000007639 printing Methods 0.000 claims description 23
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 14
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 14
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 14
- 229920002472 Starch Polymers 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 13
- 239000011121 hardwood Substances 0.000 claims description 13
- 239000011122 softwood Substances 0.000 claims description 13
- 239000008107 starch Substances 0.000 claims description 13
- 235000019698 starch Nutrition 0.000 claims description 13
- 239000011256 inorganic filler Substances 0.000 claims description 11
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 11
- 239000004698 Polyethylene Substances 0.000 claims description 10
- 229940037003 alum Drugs 0.000 claims description 10
- 229920000573 polyethylene Polymers 0.000 claims description 10
- 239000004927 clay Substances 0.000 claims description 9
- 230000002209 hydrophobic effect Effects 0.000 claims description 9
- 239000004743 Polypropylene Substances 0.000 claims description 8
- 229920001155 polypropylene Polymers 0.000 claims description 8
- 239000010410 layer Substances 0.000 claims description 6
- 238000003490 calendering Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000007865 diluting Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 description 25
- 125000002091 cationic group Chemical group 0.000 description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 8
- 238000010790 dilution Methods 0.000 description 8
- 239000012895 dilution Substances 0.000 description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000000377 silicon dioxide Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 4
- 239000011087 paperboard Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 3
- 125000000129 anionic group Chemical group 0.000 description 3
- 238000004061 bleaching Methods 0.000 description 3
- 239000011859 microparticle Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 239000004155 Chlorine dioxide Substances 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000019398 chlorine dioxide Nutrition 0.000 description 2
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 description 2
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 2
- 229920002401 polyacrylamide Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000539 dimer Substances 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000021197 fiber intake Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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
- 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 Properties of the resulting paper (“MG Kraft paper”) were measured and compared to a reference paper (“Multi-cylinder-dried Kraft paper”) representing the prior art (see Table 1).
- 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 4
- 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)
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16154285.7A EP3202979B1 (de) | 2016-02-04 | 2016-02-04 | Flüssigkeitsverpackungsmaterial |
RU2018125441A RU2696469C1 (ru) | 2016-02-04 | 2017-02-01 | Бумага для упаковки жидкостей |
PCT/EP2017/052120 WO2017134088A1 (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 |
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 |
SG11201806439YA SG11201806439YA (en) | 2016-02-04 | 2017-02-01 | Liquid packaging paper |
MX2018009388A MX2018009388A (es) | 2016-02-04 | 2017-02-01 | Papel para empacar liquidos. |
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 (de) | 2016-02-04 | 2016-02-04 | Flüssigkeitsverpackungsmaterial |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3202979A1 true EP3202979A1 (de) | 2017-08-09 |
EP3202979B1 EP3202979B1 (de) | 2018-08-22 |
Family
ID=55345691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16154285.7A Active EP3202979B1 (de) | 2016-02-04 | 2016-02-04 | Flüssigkeitsverpackungsmaterial |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP3202979B1 (de) |
CN (1) | CN108699776B (de) |
BR (1) | BR112018015785B1 (de) |
MX (1) | MX2018009388A (de) |
MY (1) | MY187341A (de) |
RU (1) | RU2696469C1 (de) |
SG (1) | SG11201806439YA (de) |
WO (1) | WO2017134088A1 (de) |
ZA (1) | ZA201804570B (de) |
Cited By (9)
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EP3620576B1 (de) | 2018-07-09 | 2021-09-01 | Hansol Paper Co., Ltd. | Barrierelaminat mit hervorragenden barriereeigenschaften gegen feuchtigkeit und gas und herstellungsverfahren dafür |
SE2051028A1 (en) * | 2020-09-01 | 2022-03-02 | Stora Enso Oyj | A method for producing a machine glazed paper comprising microfibrillated cellulose and a machine glazed paper |
SE2051027A1 (en) * | 2020-09-01 | 2022-03-02 | Stora Enso Oyj | A method for producing a multilayer machine glazed paper comprising highly refined cellulose fibers and a multilayer machine glazed paper produced |
EP3974580A1 (de) * | 2020-09-28 | 2022-03-30 | BillerudKorsnäs AB | Papierprodukt zur folienumwicklung |
EP3786079B1 (de) | 2019-08-27 | 2022-04-06 | BillerudKorsnäs AB | Papiertüte |
EP4067568A1 (de) * | 2021-03-31 | 2022-10-05 | Mondi AG | Verpackungspapier |
EP4234810A1 (de) * | 2022-02-28 | 2023-08-30 | Billerud Aktiebolag (publ) | Fluorchemisch freies mehrträgerpapier |
EP4299831A1 (de) * | 2022-06-30 | 2024-01-03 | Billerud Aktiebolag (publ) | Maschinenglasiertes papier und verfahren zum herstellen des maschinenglasierten papiers |
EP4353901A1 (de) * | 2022-10-12 | 2024-04-17 | Billerud Aktiebolag (publ) | Dehnbares papier mit hoher dichte |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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BR102017028522A2 (pt) * | 2017-12-28 | 2019-07-16 | Klabin S/A | Papel kraftliner de fibra química curta |
WO2024178445A1 (en) * | 2023-03-02 | 2024-09-06 | Mondi Ag | Method for producing a packaging article and a packaging article |
AT526583B1 (de) * | 2023-03-02 | 2024-05-15 | Mondi Ag | Verfahren zur Herstellung eines Verpackungsmaterials |
AT526582B1 (de) * | 2023-03-02 | 2024-05-15 | Mondi Ag | Verfahren zur Herstellung eines Verpackungsmaterials |
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SE9801675D0 (sv) * | 1998-05-13 | 1998-05-13 | Tetra Laval Holdings & Finance | Gas barrier packaging laminate, method for production thereof and packaging containers |
FI112048B (fi) * | 2000-04-10 | 2003-10-31 | Stora Enso Oyj | Kerrostettu kuumasaumautuva pakkausmateriaali, siitä muodostettu elintarvikepakkaus sekä pakkausmenetelmä |
PL1861544T3 (pl) * | 2005-02-10 | 2017-12-29 | Stora Enso Ab | Wysokojakościowa tektura i wykonane z niej produkty |
SE534561C2 (sv) * | 2009-04-03 | 2011-10-04 | Korsnaes Ab | Pigmentbestruken kartong för förpackningar, förpackning innefattande pigmentbestruken kartong, användning av sådan kartong, och ett förfarande i en process för tillverkning av kartong |
RU2540605C2 (ru) * | 2009-07-08 | 2015-02-10 | Тетра Лаваль Холдингз Энд Файнэнс С.А. | Не содержащий металлической фольги ламинированный материал для мешка, способ производства материала для мешка и полученный из него упаковочный материал |
CN103313852B (zh) * | 2011-01-05 | 2016-08-31 | 利乐拉瓦尔集团及财务有限公司 | 无箔包装层压材料和其制造方法以及由其制成的包装容器 |
DE102011001617A1 (de) * | 2011-03-29 | 2012-10-04 | Papierfabrik Hamburger Rieger GmbH & Co. KG | Vorrichtung und Verfahren zur Herstellung eines mehrlagigen Verpackungspapiers |
EP2949597A1 (de) * | 2014-05-28 | 2015-12-02 | Tetra Laval Holdings & Finance S.A. | Verpackungsmaterial und Verpackungsbehälter |
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2016
- 2016-02-04 EP EP16154285.7A patent/EP3202979B1/de active Active
-
2017
- 2017-02-01 BR BR112018015785-6A patent/BR112018015785B1/pt active IP Right Grant
- 2017-02-01 MY MYPI2018702641A patent/MY187341A/en unknown
- 2017-02-01 WO PCT/EP2017/052120 patent/WO2017134088A1/en active Application Filing
- 2017-02-01 MX MX2018009388A patent/MX2018009388A/es active IP Right Grant
- 2017-02-01 SG SG11201806439YA patent/SG11201806439YA/en unknown
- 2017-02-01 CN CN201780009181.6A patent/CN108699776B/zh active Active
- 2017-02-01 RU RU2018125441A patent/RU2696469C1/ru active
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2018
- 2018-07-09 ZA ZA2018/04570A patent/ZA201804570B/en unknown
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WO1999002772A1 (en) * | 1997-07-09 | 1999-01-21 | Assidomän AB | Kraft paper and method for making the same |
WO2000014333A1 (en) * | 1998-09-03 | 2000-03-16 | Stora Kopparberg Bergslags Ab (Publ) | Paper or paperboard laminate and method to produce such a laminate |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3620576B1 (de) | 2018-07-09 | 2021-09-01 | Hansol Paper Co., Ltd. | Barrierelaminat mit hervorragenden barriereeigenschaften gegen feuchtigkeit und gas und herstellungsverfahren dafür |
EP3786079B1 (de) | 2019-08-27 | 2022-04-06 | BillerudKorsnäs AB | Papiertüte |
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 |
SE2051028A1 (en) * | 2020-09-01 | 2022-03-02 | Stora Enso Oyj | A method for producing a machine glazed paper comprising microfibrillated cellulose and a machine glazed paper |
SE2051027A1 (en) * | 2020-09-01 | 2022-03-02 | Stora Enso Oyj | A method for producing a multilayer machine glazed paper comprising highly refined cellulose fibers and a multilayer machine glazed paper produced |
WO2022049483A1 (en) * | 2020-09-01 | 2022-03-10 | Stora Enso Oyj | A method for producing a machine glazed paper comprising microfibrillated cellulose and a machine glazed paper |
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 (de) * | 2020-09-28 | 2022-03-30 | BillerudKorsnäs AB | Papierprodukt zur folienumwicklung |
WO2022064048A1 (en) * | 2020-09-28 | 2022-03-31 | Billerudkorsnäs Ab | Paper product for flow wrapping |
WO2022207756A1 (de) * | 2021-03-31 | 2022-10-06 | Mondi Ag | Verpackungspapier |
EP4067568A1 (de) * | 2021-03-31 | 2022-10-05 | Mondi AG | Verpackungspapier |
EP4234810A1 (de) * | 2022-02-28 | 2023-08-30 | Billerud Aktiebolag (publ) | Fluorchemisch freies mehrträgerpapier |
WO2023161351A1 (en) * | 2022-02-28 | 2023-08-31 | Billerud Aktiebolag (Publ) | A fluorochemical-free grease-barrier paper |
EP4299831A1 (de) * | 2022-06-30 | 2024-01-03 | Billerud Aktiebolag (publ) | Maschinenglasiertes papier und verfahren zum herstellen des maschinenglasierten papiers |
WO2024003314A1 (en) * | 2022-06-30 | 2024-01-04 | Billerud Aktiebolag (Publ) | Machine glazed paper and method for preparing the machine glazed paper |
EP4353901A1 (de) * | 2022-10-12 | 2024-04-17 | Billerud Aktiebolag (publ) | Dehnbares papier mit hoher dichte |
WO2024079266A1 (en) * | 2022-10-12 | 2024-04-18 | Billerud Aktiebolag (Publ) | Stretchable high-density paper |
Also Published As
Publication number | Publication date |
---|---|
RU2696469C1 (ru) | 2019-08-01 |
MX2018009388A (es) | 2019-06-06 |
MY187341A (en) | 2021-09-22 |
SG11201806439YA (en) | 2018-08-30 |
CN108699776B (zh) | 2021-12-24 |
WO2017134088A1 (en) | 2017-08-10 |
ZA201804570B (en) | 2021-06-30 |
EP3202979B1 (de) | 2018-08-22 |
BR112018015785A2 (pt) | 2019-01-02 |
BR112018015785B1 (pt) | 2022-09-13 |
CN108699776A (zh) | 2018-10-23 |
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