EP3186442A1 - Papier barriere thermoscellant - Google Patents
Papier barriere thermoscellantInfo
- Publication number
- EP3186442A1 EP3186442A1 EP15752945.4A EP15752945A EP3186442A1 EP 3186442 A1 EP3186442 A1 EP 3186442A1 EP 15752945 A EP15752945 A EP 15752945A EP 3186442 A1 EP3186442 A1 EP 3186442A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- paper according
- filler
- lamellar
- precoat
- 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
- 238000007789 sealing Methods 0.000 title claims description 12
- 230000004888 barrier function Effects 0.000 title description 41
- 239000000945 filler Substances 0.000 claims abstract description 65
- 239000000203 mixture Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 28
- 239000011230 binding agent Substances 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000035699 permeability Effects 0.000 claims abstract description 10
- 239000010410 layer Substances 0.000 claims description 59
- 229920000126 latex Polymers 0.000 claims description 16
- 239000004816 latex Substances 0.000 claims description 15
- 229920000642 polymer Polymers 0.000 claims description 15
- 235000012211 aluminium silicate Nutrition 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 14
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- 239000002174 Styrene-butadiene Substances 0.000 claims description 9
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 claims description 9
- 239000011115 styrene butadiene Substances 0.000 claims description 9
- 229920003048 styrene butadiene rubber Polymers 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 5
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 229920001577 copolymer Polymers 0.000 claims description 4
- 239000006185 dispersion Substances 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000000454 talc Substances 0.000 claims description 4
- 229910052623 talc Inorganic materials 0.000 claims description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 3
- 238000003490 calendering Methods 0.000 claims description 3
- 230000009477 glass transition Effects 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000013305 food Nutrition 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- 229920000638 styrene acrylonitrile Polymers 0.000 claims description 2
- 239000002706 dry binder Substances 0.000 claims 1
- 239000011247 coating layer Substances 0.000 abstract description 2
- 238000000576 coating method Methods 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 15
- 239000005995 Aluminium silicate Substances 0.000 description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 10
- 239000000049 pigment Substances 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000009472 formulation Methods 0.000 description 5
- 229920002472 Starch Polymers 0.000 description 4
- 235000010216 calcium carbonate Nutrition 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 239000008107 starch Substances 0.000 description 4
- 235000019698 starch Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920003043 Cellulose fiber Polymers 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000009459 flexible packaging Methods 0.000 description 2
- 239000012793 heat-sealing layer Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 229920006397 acrylic thermoplastic Polymers 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- WNVCAMQMEDYSDX-UHFFFAOYSA-N butyl prop-2-enoate;5-phenylpenta-2,4-dienenitrile Chemical compound CCCCOC(=O)C=C.N#CC=CC=CC1=CC=CC=C1 WNVCAMQMEDYSDX-UHFFFAOYSA-N 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000004815 dispersion polymer Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007760 metering rod coating Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 1
- 235000010215 titanium dioxide Nutrition 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000000080 wetting agent Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/42—Applications of coated or impregnated materials
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings 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
- D21H19/22—Polyalkenes, e.g. polystyrene
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/385—Oxides, hydroxides or carbonates
-
- 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
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- 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
- D21H19/82—Paper comprising more than one coating superposed
-
- 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
- D21H19/82—Paper comprising more than one coating superposed
- D21H19/826—Paper comprising more than one coating superposed two superposed coatings, the first applied being pigmented and the second applied being non-pigmented
-
- 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
- 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
- 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
- D21H21/50—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 form
- D21H21/52—Additives of definite length or shape
Definitions
- US 2,653,870 A discloses a method of manufacturing wrapping paper.
- Packages made from barrier papers manufactured online are described in the application WO2011 / 056130. Online manufacturing means manufacturing on a single production tool with all the elements that are useful for making paper.
- the proposed barrier level is limited to mild measurement conditions (temperate, i.e. 25 ° C, 75% relative humidity).
- the barrier level is measured by permeability to water vapor, a low barrier signifying high water vapor permeability. It is known in the literature that the "tropical" conditions (38 ° C, 90% humidity) are much more severe than the temperate conditions, and therefore the barrier measured under the temperate conditions is much lower.
- carrier paper is meant a non-porous paper, having a fibrous substrate coated with one or more layers, sufficiently vapor-tight to prevent penetration thereof into the package. in an amount that may affect the preservation of the product or the integrity of the product contained therein.
- the invention is particularly, but not exclusively, concerned with water vapor barrier papers having a water vapor permeability of at most 150 g / m 2 / 24h and, preferably, less than 100 g / m 2 / 24h, measured according to ASTM F 1249 in so-called tropical conditions of 38 ° C and 90% relative humidity.
- heat-sealable papers involves, for example, the deposition of a covering layer of a heat-sealing polymer on a cellulosic substrate.
- a covering layer has a rather strong stickiness when not dry, and must be able to be completely dried before the paper is wound on itself, otherwise the different turns of the coil will stick together.
- this covering layer is generally performed offline during one or more processing steps, which makes it possible to have a good quality of coating, to benefit from paper at room temperature at the time of coating. which allows the covering layer not to penetrate too much into the fibrous support, and to be able to adapt the passage time of the width in the furnaces, at a speed of, for example, the order of 200 m / min, so that the duration of exposure to these heating means is sufficient to completely dry the theraioscellante overlay.
- the invention relates to the development of a paper endowed, during its manufacture online, water vapor barrier properties and heat sealability. This barrier and heat seal paper can be used to make a package by welding the paper on itself.
- Another possibility is to provide the presence of a precoat to reduce the porosity of the paper.
- Another possibility is to combine one or the other of the previous ones.
- Some hydrophobic and highly hydrophobic latexes can be used in the precoat formulation.
- the invention meets this need, according to one of its aspects, thanks to a paper comprising: a fibrous substrate,
- a prelayer comprising a binder and a mixture of lamellar filler (s) with a shape factor of at least 15 and a particularly finer filler (s) whose particle size is at 80% by weight less than 2 ⁇ (measured according to the Sedigraph method IS013317-3),
- lamellar fillers contribute to increase the barrier effect thanks to the tortuosity they bring, as taught for example in the document Imerys Technical Guide, Pigments for Paper, May 2008.
- the presence according to this aspect of the The invention of at least one finer particulate filler, in particular non-lamellar, increases this effect.
- This charge by interfering between the lamellar particles, further hinders the movement of the water molecules, in particular around the lamellar particles.
- WO 2009/117040 A1 discloses lamellar clay fillers.
- the invention makes it possible to have a reinforced barrier effect with the precoat, which allows a reduction in the amount of covering layer to be applied or, with an equal amount of covering layer, makes it possible to further increase the barrier level of the paper, This may be useful for papers that need to be watertight.
- the reduction in the amount of overlay required because of the power stronger barrier of the precoated paper facilitates its drying and can make it easier to coat it during the online manufacture of the paper.
- the paper of the invention is preferably made on a paper machine from a fibrous substrate consisting of cellulose fibers and optionally synthetic fibers.
- Cellulose fibers are generally a mixture of short fibers and long fibers.
- Additives such as sizing agents, wet strength agents, retention agents, or defoamers may be added.
- the paper may also contain paper stocks such as titanium dioxide, kaolin, calcium carbonate, talc, among others.
- the paper is preferably a wrapping paper.
- the invention also relates to a precoated paper suitable for the manufacture of a barrier paper according to the invention as defined above, having a water vapor permeability of at most 150 g / nr724h and preferably less than at 100 g / m 2 / 24h, according to the aforementioned standard.
- the precoated paper may be non-calendered.
- the invention also relates to a precoat composition for the manufacture of a paper according to the invention, comprising a binder in the form of latex and a dispersion of a mixture of filler (s) form factor (s) at least 15 and filler (s) finer (s) whose particle size at 80% by weight is less than 2 microns.
- the invention further relates to a package comprising a paper according to the invention, in particular heat-sealed on itself and containing for example a food product.
- the precoat may be identical to the covering layer or be a pigment layer as defined below.
- the precoat is preferably composed of a mixture of at least one latex and fillers still sometimes called "pigments".
- the latex according to the invention preferably has a Tg (glass transition temperature) measured according to standard ASTM E1356 less than 25 ° C and more preferably less than 10 ° C.
- the latex may be chosen from the following types of chemical latex: styrene-butadiene, styrene-acrylic, acrylics, butyl-acrylate, butyl-acrylate-styrene-acrylonitrile, and more particularly from styrene-butadiene emulsions.
- the level of latex is preferably at least 15 parts in dry relative to the dry charges (100 parts), preferably at least, or even more, of 25 and better
- the finer fillers may, according to a first example, have a smaller particle size than that of lamellar fillers with an equivalent weight distribution. According to a second example, they may have a greater weight distribution for the same particle size as that of the lamellar fillers.
- the percentage of lamellar charges with respect to the total charges can vary from 10 to 90%, preferably from 40 to 90% and even more preferably from 60 to 90%.
- the lamellar fillers may be chosen for example from kaolin and talc, and mixtures thereof.
- the particles of the lamellar fillers are in particular oriented substantially parallel to the surface of the substrate.
- the particles of the finer fillers may be chosen from calcium carbonate, barium sulfate, silica, titanium dioxide or mixtures thereof. They are characterized by a particle size at 80% by weight less than at 2 microns, measured according to Sedigraph method ISO 13317-3
- the finer fillers may also be chosen from any other pigment, including kaolin, of sufficient fineness, especially with a particle size of 95% by weight less than 2 microns, measured according to Sedigraph method ISO 13317-3.
- the polymers used to obtain the vapor barrier and the heat seal are preferably chosen from polymers or copolymers based on PVdC (polyvinylidene chloride) or acrylic.
- fillers in the covering layer can in particular help reduce the risk of bonding the coils of the coil together.
- the cover layer is applied in line.
- the invention makes it possible to obtain good levels of water vapor barrier with covering layer weights not exceeding 10 g / m 2 in sec.
- the coating in line of a composition intended to form the heat-sealing covering layer is possible , provided that sufficient drying capacity is used to dry the layer prior to the winding operation.
- a relatively low coverage layer weight can facilitate on-line drying, while providing sufficient barrier properties.
- the paper sheet After drying the fibrous substrate, the paper sheet can pass on a Yankee cylinder to improve the surface state of the sheet and thus the distribution of the first layer.
- the sheet can then be processed in size-press or any other equipment of the same type.
- a pigment composition can be used beforehand in order to make "plugging".
- This pore-filler composition can contain up to 20 parts in dry relative to the binder dry charges such as latex, chemical styrene-butadiene for example, and up to 20 parts in dry relative to the dry pigments of co-binders such as starch for example.
- binder dry charges such as latex, chemical styrene-butadiene for example
- co-binders such as starch for example
- This composition preferably contains fillers that are generally less than 2 microns in size. These fillers may be chosen, among others, from kaolin or calcium carbonates or mixtures thereof.
- the precoat is applied to the support thus treated using any of the coating techniques that may be encountered on the paper machines. This can include a blade coating, rotogravure, reverse engraving or a coating at the bar Meyer.
- the precoat is deposited with a dry layer weight of preferably between 4 and 12 g / m 2 .
- the covering layer is deposited with a dry layer weight preferably of 10 g / m 2 maximum.
- This covering layer is then sufficiently dried, to prevent the turns sticking at the winding reel, using one or more infrared ovens and / or one or more hot air ovens .
- a coating on the opposite side can be made to reinforce the barrier and / or to provide other features such as printability, curl correction, ....
- the paper thus produced can optionally be calendered in line to reduce the surface roughness before being rolled up.
- the final basis weight of the paper may be between 45 and 200 g / m 2 .
- the barrier to water vapor measured according to ASTM F1249 at 38 ° C and 90% relative humidity is less than 150g / m 2 / 24h, and passedemiellement to 100g / m 2 / 24h.
- the fibrous support is firstly rubbed and then treated in line on both sides by size-press with a filler-containing pigment composition, containing 100 dry parts of kaolin type Amazon Premium (Cadam), and a mixture of starch Merifilm 104 (Tate & Lyle) and latex type DL950 (Dow) to 20 dry parts compared to dry kaolin
- the treatment applied is 5g / m 2 sec in total.
- the particle size at 97% by weight of Amazon Premium, measured according to Sedigraph method ISO 13317-3, is less than 2 microns.
- the Capim NP Particle Form Factor is 28.
- the water vapor barrier is measured by a Mocon brand apparatus, Permatran 3/61 type according to ASTM F1249 at 38 ° C and 90% relative humidity to determine the barrier contribution of this precoat. It is measured at 334 +/- 13g / m 2 / 24h. After coating of the covering layer, a barrier of less than 150 g / m 2 / 24h is obtained.
- the fibrous support is firstly rubbed and then processed in line on both sides by size-press with a filler-containing pigment composition containing 100 dry parts of kaolin type Amazon Premium (Cadam) and a mixture of starch Merifilm 104
- the particle size at 95% by weight of Hydrocarb 95, measured according to the Sedigraph method ISO 13317-3, is less than 2 microns.
- a paper is produced online under the same conditions as in Example 1. But following the removal of the precoat, it is coated in line with a covering layer consisting of a dispersion of PVdC copolymer (Diofan A297
- the water vapor barrier is measured by a Mocon brand apparatus, Permatran 3/61 type according to ASTM F1249 at 38 ° C and 90% relative humidity.
- the seal is then simulated on a laboratory heat sealer by gluing the coated side of the cover layer to itself at 110 ° C, under 3bars and for 0.5 seconds. Then the force required to detach the papers stuck on 15mm wide samples is then measured at a 90 degree angle according to the Tappi T540 standard at a speed of 100mm / min.
- the invention may have one or more of the following advantageous features:
- the weight of the covering layer does not exceed 10 g / m 2 in dry, in particular is strictly less than 10 g / m 2 ,
- the covering layer comprises or consists of a heat-sealable polymer
- the lamellar charge (s) and the finer charge (s) are of the same nature
- the form factor of the lamellar filler particles is at least 40, more preferably at least 60,
- the finer filler (s) have a particle size of 95% by weight, less than 2 microns, measured according to the Sedigraph method ISO 13317-3,
- the lamellar charge or fillers are mineral
- the blade filler (s) are chosen from kaolin and talc and mixtures thereof,
- the finer filler (s) are chosen from kaolin, calcium carbonate, barium sulfate, silica, titanium dioxide and mixtures thereof,
- the finest load (s) are chosen from among the kaolins
- the dry weight of the lamellar filler (s) is between 3 and 58% of the total dry weight of the precoat, the weight of the lamellar filler (s) being preferably greater than that of the finer fillers,
- the dry weight of the finer filler (s) is between 3 and 58% of the total dry weight of the precoat
- the percentage of lamellar filler (s), expressed as dry weight, relative to the total of the charges, expressed as dry weight, is between 10 and 90%, preferably between 40 and 90% and even more preferably between 60 and 90%; and 90%
- the binder has a glass transition temperature T g less than or equal to 25 ° C and more preferably less than 10 ° C,
- the binder is chosen from styrene-butadiene, styrene-acrylic, acrylic, butyl-acrylate, butyl-aryl-styrene-acrylonitrile, and mixtures thereof,
- the binder is chosen from styrene-butadiene chemical latexes, the binder is introduced in the form of a latex,
- the binder comprises a polymer of chemical nature not present in the covering layer
- the covering layer is substantially free of charge
- the covering layer is the single layer covering the precoat
- the covering layer comprises one or more polymers chosen from copolymers based on PVdC or styrene-acrylic and their mixtures,
- the paper comprises a printability layer on the face of the substrate opposite to that carrying the precoat and the covering layer,
- the substrate has two identical pre-layers on its opposite faces,
- seal composition is applied to the substrate, and the precoat is applied to the seal composition, the seal composition is preferably applied by size-press or film-press,
- the paper is heat-sealable, especially from 90 ° C., when the sealing is carried out on hot tongs, under 3 bars and for 0.5 seconds,
- the water vapor permeability of the barrier paper is less than 100 g / m 2 / 24k between 30% and 80% by weight of lamellar particles are less than or equal to 2 ⁇ m in size (measured according to the Sedigraph method ISO 13317-3),
- the paper is heat-sealable, in particular on itself, at a production rate greater than or equal to 40 bags per minute, on vertical packing machines of the Vertical Form, Fill and Seal (VFFS) type, along lines of longitudinal sealing of 330 mm per bag,
- VFFS Vertical Form, Fill and Seal
- the paper is heat-sealable to itself with a sealing force greater than or equal to 2 N / 15 mm, measured at a 90 degree angle according to the Tappi T540 standard at a speed of 100 mm / min, when the sealing is carried out on hot tongs, under 3 bars, and for 0.5 s,
- the temperature of the fibrous substrate during the application of the precoat is greater than or equal to 50 ° C.
- the temperature of the fibrous substrate during the application of the covering layer is greater than or equal to 70 ° C.
- the final grammage of the paper is between 45 and 200 g / m 2 .
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- Paper (AREA)
- Wrappers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1457368A FR3024467B1 (fr) | 2014-07-30 | 2014-07-30 | Papier barriere thermoscellant |
PCT/EP2015/067438 WO2016016340A1 (fr) | 2014-07-30 | 2015-07-29 | Papier barriere thermoscellant |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3186442A1 true EP3186442A1 (fr) | 2017-07-05 |
EP3186442B1 EP3186442B1 (fr) | 2021-05-26 |
EP3186442B2 EP3186442B2 (fr) | 2024-07-10 |
Family
ID=
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022103458A1 (fr) * | 2020-11-11 | 2022-05-19 | Sappi North America, Inc. | Produits en papier résistant à l'huile/la graisse |
Non-Patent Citations (2)
Title |
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None * |
See also references of WO2016016340A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022103458A1 (fr) * | 2020-11-11 | 2022-05-19 | Sappi North America, Inc. | Produits en papier résistant à l'huile/la graisse |
US11549216B2 (en) | 2020-11-11 | 2023-01-10 | Sappi North America, Inc. | Oil/grease resistant paper products |
Also Published As
Publication number | Publication date |
---|---|
JP2020073753A (ja) | 2020-05-14 |
US20170211237A1 (en) | 2017-07-27 |
CN107075810A (zh) | 2017-08-18 |
WO2016016340A1 (fr) | 2016-02-04 |
EP3186442B1 (fr) | 2021-05-26 |
FR3024467B1 (fr) | 2019-05-17 |
FR3024467A1 (fr) | 2016-02-05 |
ZA201700739B (en) | 2018-05-24 |
CN107075810B (zh) | 2019-08-27 |
BR112017001817B1 (pt) | 2022-02-01 |
CA2956766A1 (fr) | 2016-02-04 |
BR112017001817A2 (pt) | 2018-02-14 |
JP2017524081A (ja) | 2017-08-24 |
AR101667A1 (es) | 2017-01-04 |
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