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WO2016016340A1 - Heat-sealing barrier paper - Google Patents

Heat-sealing barrier paper Download PDF

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Publication number
WO2016016340A1
WO2016016340A1 PCT/EP2015/067438 EP2015067438W WO2016016340A1 WO 2016016340 A1 WO2016016340 A1 WO 2016016340A1 EP 2015067438 W EP2015067438 W EP 2015067438W WO 2016016340 A1 WO2016016340 A1 WO 2016016340A1
Authority
WO
WIPO (PCT)
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.)
Ceased
Application number
PCT/EP2015/067438
Other languages
French (fr)
Inventor
Laurent Schildknecht
Séverine SCHOTT
Pascale Escaffre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Munksjo Oyj
Original Assignee
Munksjo Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51659894&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2016016340(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to CN201580053261.2A priority Critical patent/CN107075810B/en
Priority to CA2956766A priority patent/CA2956766A1/en
Priority to EP15752945.4A priority patent/EP3186442B2/en
Priority to BR112017001817-9A priority patent/BR112017001817B1/en
Priority to FIEP15752945.4T priority patent/FI3186442T4/en
Application filed by Munksjo Oyj filed Critical Munksjo Oyj
Priority to US15/500,334 priority patent/US20170211237A1/en
Priority to JP2017526012A priority patent/JP2017524081A/en
Publication of WO2016016340A1 publication Critical patent/WO2016016340A1/en
Priority to ZA2017/00739A priority patent/ZA201700739B/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper

Definitions

  • the present invention relates to the field of packaging papers.
  • Plastic films are widely used in flexible packaging because they have water vapor barrier properties necessary for the proper preservation of perishable products or having a limited life.
  • Papers are materials made from fibers, usually cellulosic, therefore of plant origin. They are naturally porous and gas permeable and can not, as such, be used for this application.
  • 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.
  • barrier paper is also heat-sealable, to allow the formation of the package by welding the paper on itself.
  • 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.
  • Papers offering a water vapor barrier and possibly heat-sealing are generally manufactured in the state of the art during processing operations and have standard covering layers of 10 to 30 g / m 2 dry which are deposited in one or more thicknesses by means of different coating means (air knife, reverse etching, Meyer blade or bar or any other coating method) or by the application of a thick layer to the coating. using a curtain bed.
  • 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.
  • the cover layer does not penetrate too deeply into the fibrous substrate to reduce the amount of paper applied when this layer is polymer-based. In addition, less penetration of the covering layer makes it easier to create a barrier film.
  • a second possibility is the use of a calender before any paper treatment.
  • 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 hydrophobic character of the precoat layer can then pose a wettability problem when the covering layer is applied, when the latter is aqueous, resulting in a non-perfectly homogeneous covering of the fibrous substrate precoated by the covering layer, especially in the case of an in-line process with a high speed of the sheet.
  • the surface energy of the precoat must be sufficiently different from that of the covering layer while respecting the well known rules of wettability to reduce the risk of wetting defects.
  • 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 invention further relates to a process for producing a paper according to the invention in which the precoat composition as defined above is applied to a fibrous substrate.
  • 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 fillers are preferably constituted by a mixture of lamellar filler (s) and finer fillers, in particular non-lamellar fillers.
  • the lamellar filler (s) are lamellar particles having a form factor (greater length to thickness ratio) greater than or equal to 15, more preferably at least 40 and even more preferably at least 60 .
  • the precoat comprises a binder and a mixture of lamellar filler (s) of form factor of at least 15 and finer filler (s), in particular non-lamellar (s), the particle size of which is at 80% by weight less than 2 ⁇ m (measured according to the method
  • the particle size at 80% by weight of the lamellar charge (s) may be greater than or equal to 2 ⁇ m.
  • less than 80% by weight of lamellar particles may be less than 2 ⁇ m.
  • 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 finer fillers can be chosen from all the other pigments used in the paper industry, which satisfy the required size requirements.
  • 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.
  • lamellar particles may be less than or equal to 2 ⁇ m in size (measured according to Sedigraph method ISO 13317-3).
  • 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 binder is preferably chosen from the abovementioned latices, but other binders or co-binders such as PVOH, starch, CMC, etc. may be used.
  • the binder may comprise a polymer of a chemical nature not present in the covering layer.
  • 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.
  • polymers are applied pure or mixed with fillers.
  • pure is meant without particulate load.
  • Other products may optionally be added to the polymer dispersion, such as pH-control agents, rheological agents (eg viscosizing agents), anti-foam agents, wetting agents,
  • 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 online process increases productivity by eliminating off-line handling operations.
  • 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 .
  • This precoat is then dried without contact by one or more infrared ovens and / or one or more hot air ovens.
  • 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.
  • a fibrous support of 55 g / m 2 is produced on a paper machine operating at 400 m / min.
  • the paper machine is equipped with a Yankee roller placed before the size-press.
  • 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.
  • 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 315 +/- 9g / m 2 / 24h. After coating of the covering layer, a barrier of less than 150 g / m 2 / 24h is obtained.
  • 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 dry weight of the covering layer is 6.5 g / m 2 .
  • 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 precoat has at least 15 parts by weight of binder relative to the weight in dry charges (100 parts), and preferably of more than 25, more preferably 30 parts,
  • 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,
  • the substrate carries two precolors of different natures 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 grammage of the fibrous substrate is between 25 and 180 g / m 2 .
  • 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

The invention relates to a paper comprising: a fibrous substrate; a precoat including a binder and a mixture of lamellar filler(s) having a form factor of at least 15 and of finer filler(s) having a particle size, at a concentration of 80% by weight, of less than 2 μm (measured using the SediGraph technique according to ISO 13317-3); and at least one coating layer applied to the precoat, said paper having a water vapour permeability of at most 150 g/m2/24h and preferably less than 100g /m2/24h, measured according to ASTM F 1249 under so-called tropical conditions of 38°C and 90% relative humidity.

Description

Papier barrière thermoscellant  Heat Seal Barrier Paper

La présente invention concerne le domaine des papiers d'emballage. Les films plastiques sont largement utilisés dans les emballages flexibles car ils possèdent des propriétés de barrière à la vapeur d'eau nécessaires à la bonne conservation de produits périssables ou ayant une durée de vie limitée.  The present invention relates to the field of packaging papers. Plastic films are widely used in flexible packaging because they have water vapor barrier properties necessary for the proper preservation of perishable products or having a limited life.

Les papiers sont des matériaux fabriqués à partir de fibres, généralement cellulosiques, donc d'origine végétale. Ils sont naturellement poreux et perméables aux gaz et ne peuvent pas, tels quels, être utilisés pour cette application.  Papers are materials made from fibers, usually cellulosic, therefore of plant origin. They are naturally porous and gas permeable and can not, as such, be used for this application.

Il est cependant connu d'associer des papiers avec d'autres matériaux (plastiques, aluminium,...) pour obtenir les barrières nécessaires à l'emballage de produits divers et notamment des denrées périssables Dans ce cas le substrat papier est soumis à des opérations de transformation qui incluent par exemple l'enduction de couches de recouvrement faites de polymères en dispersion, l'extrusion couchage de polymères fondus ou le contre-collage avec des films plastiques ou de l'aluminium. Le coût de ce composite à base de papier à propriétés barrières est devenu onéreux.  However, it is known to associate papers with other materials (plastics, aluminum, ...) to obtain the necessary barriers to the packaging of various products including perishable goods In this case the paper substrate is subject to processing operations which include, for example, coating of overcoats made of dispersion polymers, extrusion coating of molten polymers or laminating with plastic films or aluminum. The cost of this barrier-based paper composite has become expensive.

Le document US 2 653 870 A décrit un procédé de fabrication de papier d'emballage.  US 2,653,870 A discloses a method of manufacturing wrapping paper.

Des emballages réalisés à partir de papiers barrières fabriqués en ligne sont décrits dans la demande WO2011/056130. On entend par fabrication en ligne, la fabrication sur un unique outil de production comportant tous les éléments utiles à la réalisation du papier.  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.

Cependant, le niveau barrière proposé est limité à des conditions de mesures peu contraignantes (tempérées, i.e. 25°C, 75% d'humidité relative). Le niveau barrière est mesuré par une perméabilité à la vapeur d'eau, une barrière faible signifiant une perméabilité à la vapeur d'eau élevée. Il est connu dans la littérature que les conditions « tropicales » (Le. 38°C, 90% d'humidité rëlâtîvë) sont beaucoup plus sévères que les conditions tempérées, et que donc la barrière mesurée dans les conditions tempérées est beaucoup plus faible.  However, 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.

Par "papier barrière", il faut comprendre un papier non poreux, comportant un substrat fibreux recouvert d'une ou de plusieurs couches, suffisamment étanche à la vapeur d'eau pour s'opposer à la pénétration de celle-ci dans l'emballage, en une quantité susceptible d'affecter la conservation du produit ou l'intégrité du produit contenu à l'intérieur. L'invention s'intéresse en particulier mais non exclusivement aux papiers barrières à la vapeur d'eau présentant une perméabilité à la vapeur d'eau d'au plus 150 g/m2/24h et, de préférence, inférieure à 100g /m2/24h, mesurée selon la norme ASTM F 1249 dans des conditions dites tropicales de 38°C et 90% d'humidité relative. By "barrier 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.

II est avantageux que le papier barrière soit également thermosceilable, afin de permettre la formation de l'emballage en soudant le papier sur lui-même.  It is advantageous that the barrier paper is also heat-sealable, to allow the formation of the package by welding the paper on itself.

La fabrication des papiers thermoscellables met en œuvre, par exemple, la dépose d'une couche de recouvrement d'un polymère thermoscellant sur un substrat cellulosique. Une telle couche de recouvrement présente un pouvoir collant assez fort lorsque non sèche, et doit pouvoir être séchée complètement avant que le papier ne soit enroulé sur lui-même, sous peine de collage des différentes spires de la bobine entre elles.  The production of heat-sealable papers involves, for example, the deposition of a covering layer of a heat-sealing polymer on a cellulosic substrate. Such 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.

L'application de cette couche de recouvrement se pratique généralement hors ligne lors d'une ou plusieurs étapes de transformation, ce qui permet d'avoir une bonne qualité d'enduction, de bénéficier d'un papier à température ambiante au moment du couchage ce qui permet à la couche de recouvrement de ne pas trop pénétrer dans le support fibreux, et de pouvoir adapter le temps de passage de la laize dans les fours, à une vitesse par exemple de Tordre de 200m/mn, afin que la durée d'exposition à ces moyens de chauffage soit suffisante pour sécher complètement en profondeur la couche de recouvrement theraioscellante.  The application of 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.

Les documents US 2004/121079 Al , WO 2010/052571 A2, US 2014/113080 The documents US 2004/121079 A1, WO 2010/052571 A2, US 2014/113080

Al et WO 2009/112255 Al divulguent des papiers qui sont traités hors ligne. Al and WO 2009/112255 A1 disclose papers that are processed offline.

Les papiers offrant une barrière à la vapeur d'eau et éventuellement thermoscellants, sont généralement fabriqués dans l'état de la technique lors d'opérations de transformation et présentent de manière standard des couches de recouvrement de 10 à 30 g/m2 sec qui sont déposées en une ou plusieurs épaisseurs à l'aide de différents moyens de couchage (lame d'air, reverse gravure, lame ou barre de Meyer ou tout autre mode d'enduction) ou par l'application d'une couche épaisse à l'aide d'un couchage rideau. Papers offering a water vapor barrier and possibly heat-sealing, are generally manufactured in the state of the art during processing operations and have standard covering layers of 10 to 30 g / m 2 dry which are deposited in one or more thicknesses by means of different coating means (air knife, reverse etching, Meyer blade or bar or any other coating method) or by the application of a thick layer to the coating. using a curtain bed.

La transformation hors-ligne d'un papier pour lui conférer des propriétés de barrière à la vapeur d'eau et de thermoscellabilité est donc une étape supplémentaire à la fabrication du papier qui accroît son coût de façon significative et qui limite le développement du papier dans l'emballage flexible au profit de l'emballage par les films plastiques. Il existe donc un besoin économique d'améliorer la productivité de la fabrication des papiers barrière à la vapeur d'eau et thermoscellants. L'invention concerne le développement d'un papier doté, lors de sa fabrication en ligne, de propriétés de barrière à la vapeur d'eau et de thermoscellabilité. Ce papier barrière et thermoscellant peut être utilisé pour fabriquer un emballage en soudant le papier sur lui-même. Off-line processing of paper to provide water vapor barrier and heat sealability is an additional step in paper making, which significantly increases its cost and limits paper development in the paper. flexible packaging for the benefit of packaging by plastic films. There is therefore an economic need to improve the productivity of the manufacture of water vapor barrier and heat seal papers. 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.

Indépendamment de la façon dont la couche thermoscellante est appliquée, en ligne ou hors ligne, se pose le problème de faciliter la dépose de la couche thermoscellante et plus généralement de toute couche de recouvrement, thermoscellante ou non, appliquée sur un substrat fibreux.  Regardless of how the heat sealing layer is applied, in line or offline, there is the problem of facilitating the removal of the heat-sealing layer and more generally any covering layer, heat-sealing or not, applied to a fibrous substrate.

Il est généralement souhaitable que la couche de recouvrement ne pénètre pas trop profondément dans le substrat fibreux, pour réduire la quantité appliquée du papier lorsque cette couche est à base polymère. De plus, une moindre pénétration de la couche de recouvrement permet de créer plus facilement un film barrière.  It is generally desirable that the cover layer does not penetrate too deeply into the fibrous substrate to reduce the amount of paper applied when this layer is polymer-based. In addition, less penetration of the covering layer makes it easier to create a barrier film.

L'utilisation d'un cylindre frictionneur (Yankee cylinder en anglais) est une première solution pour réduire la porosité de surface.  The use of a Yankee cylinder (Yankee cylinder) is a first solution to reduce the surface porosity.

Une seconde possibilité est l'utilisation d'une calandre avant tout traitement du papier.  A second possibility is the use of a calender before any paper treatment.

Une autre possibilité est de prévoir la présence d'une précouche pour diminuer la porosité du papier.  Another possibility is to provide the presence of a precoat to reduce the porosity of the paper.

Une autre possibilité est de combiner l'une ou l'autre des précédentes.  Another possibility is to combine one or the other of the previous ones.

On peut utiliser dans la formulation de la précouche certains latex hydrophobes et très fïlmogènes.  Some hydrophobic and highly hydrophobic latexes can be used in the precoat formulation.

Toutefois, le caractère hydrophobe de la précouche peut alors poser un problème de mouillabilité lors de l'application de la couche de recouvrement, lorsque celle-ci est aqueuse, conduisant à une couverture non parfaitement homogène du substrat fibreux précouché par la couche de recouvrement, notamment dans le cas d'un procédé en ligne avec une vitesse élevée de la feuille. En outre, l'énergie de surface de la précouche doit être suffisamment différente de celle de la couche de recouvrement tout en respectant les règles bien connues de la mouillabilité afin de diminuer le risque de défauts de mouillage.  However, the hydrophobic character of the precoat layer can then pose a wettability problem when the covering layer is applied, when the latter is aqueous, resulting in a non-perfectly homogeneous covering of the fibrous substrate precoated by the covering layer, especially in the case of an in-line process with a high speed of the sheet. In addition, the surface energy of the precoat must be sufficiently different from that of the covering layer while respecting the well known rules of wettability to reduce the risk of wetting defects.

II demeure par conséquent un besoin pour répondre de manière satisfaisante au problème de l'applicabilité de la couche de recouvrement.  There remains therefore a need to satisfactorily address the problem of the applicability of the overlay.

L'invention répond à ce besoin, selon un de ses aspects, grâce à un papier comportant : - un substrat fibreux, The invention meets this need, according to one of its aspects, thanks to a paper comprising: a fibrous substrate,

- une précouche comportant un liant et un mélange de charge(s) lamellaire(s) de facteur de forme d'au moins 15 et de charge(s) notamment plus fine(s) dont la taille des particules est à 80% en poids inférieure à 2 μιη (mesurée selon la méthode Sédigraph IS013317-3),  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 μιη (measured according to the Sedigraph method IS013317-3),

- au moins une couche de recouvrement appliquée sur la précouche,  at least one covering layer applied to the precoat,

le papier présentant une perméabilité à la vapeur d'eau d'au plus 150 g/m2/24h et de préférence inférieure à 100g /m2/24h, mesurée selon la norme ASTM F1249 dans des conditions dites tropicales de 38°C et 90% d'humidité relative. paper having a permeability to water vapor of at most 150 g / m 2 / 24h and preferably less than 100 g / m 2 / 24h, measured according to ASTM F1249 in tropical conditions of 38 ° C and 90% relative humidity.

La présence, dans la précouche selon cet aspect de l'invention, d'une charge lamellaire de facteur de forme d'au moins 15 et d'une charge particulaire plus fine, notamment non lamellaire, dont la taille de particule à 80% en poids est inférieure à 2 μm (mesurée selon la méthode Sédigraph ISO 13317-3), permet d'obtenir un niveau barrière relativement élevé, indépendamment de la nature hydrophobe ou non du liant  The presence, in the precoat according to this aspect of the invention, of a lamellar charge of form factor of at least 15 and of a finer particulate filler, in particular non-lamellar, whose particle size at 80% by weight. weight is less than 2 μm (measured according to Sedigraph method ISO 13317-3), makes it possible to obtain a relatively high barrier level, regardless of the hydrophobic nature or otherwise of the binder

II est connu que les charges lamellaires contribuent à augmenter l'effet barrière grâce à la tortuosité qu'elles apportent, comme l'enseigne par exemple le document Imerys Technical Guide, Pigments for Paper, May 2008. La présence selon cet aspect de l'invention d'au moins une charge particulaire plus fine, notamment non lamellaire, accroît cet effet. Une tentative d'explication est que cette charge, en s'immisçant entre les particules lamellaires, gêne encore davantage le mouvement des molécules d'eau en particulier autour des particules lamellaires. Le document WO 2009/117040 Al divulgue des charges lamellaires d'argile.  It is known that 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. An attempt at explanation is that 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.

Du fait de l'effet barrière lié au choix particulier des charges présentes dans la précouche, une plus grande liberté existe quant à la nature du liant utilisé.  Due to the barrier effect related to the particular choice of the charges present in the precoat, greater freedom exists as to the nature of the binder used.

Il est ainsi possible d'utiliser en particulier n'importe quel liant papetier sans propriété barrière particulière, ce qui permet d'obtenir le double avantage d'une faible perméabilité à la vapeur d'eau pour la précouche et d'une bonne mouillabilité vis-à-vis de la couche de recouvrement.  It is thus possible to use in particular any paper binder without any particular barrier property, which makes it possible to obtain the double advantage of a low permeability to water vapor for the precoat and a good wettability to the covering layer.

L'invention permet d'avoir un effet barrière renforcé avec la précouche, ce qui autorise une réduction de la quantité de couche de recouvrement à appliquer ou, à quantité de couche de recouvrement égale, permet d'accroître encore le niveau barrière du papier, ce qui peut s'avérer utile pour des papiers devant être étanches à la vapeur d'eau. La diminution de la quantité de couche de recouvrement nécessaire, du fait du pouvoir barrière plus fort du papier précouché, facilite son séchage et peut rendre plus facile le couchage de celle-ci lors de la fabrication en ligne du papier. 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.

Le papier de l'invention est de préférence réalisé sur machine à papier à partir d'un substrat fibreux constitué de fibres de cellulose et éventuellement de fibres synthétiques.  The paper of the invention is preferably made on a paper machine from a fibrous substrate consisting of cellulose fibers and optionally synthetic fibers.

Les fibres de cellulose sont en général un mélange de fibres courtes et de fibres longues.  Cellulose fibers are generally a mixture of short fibers and long fibers.

Des additifs tels que des agents de collage, agents de résistance à l'état humide, agents de rétention, ou antimousses peuvent être ajoutés.  Additives such as sizing agents, wet strength agents, retention agents, or defoamers may be added.

Le papier peut également contenir des charges papetières telles que du dioxyde de titane, du kaolin, du carbonate de calcium, du talc, entre autres.  The paper may also contain paper stocks such as titanium dioxide, kaolin, calcium carbonate, talc, among others.

Le papier est de préférence un papier d'emballage.  The paper is preferably a wrapping paper.

L'invention a encore pour objet un papier précouché convenant à la fabrication d'un papier barrière selon l'invention tel que défini ci-dessus, présentant une perméabilité à la vapeur d'eau d'au plus 150 g/nr724h et préférentiellement inférieure à 100 g/m2/24h, selon la norme précitée. Le papier précouché peut être non calandré. 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.

L'invention a encore pour objet une composition de précouchage pour la fabrication d'un papier selon l'invention, comportant un liant sous forme de latex et une dispersion d'un mélange de charge(s) lamellaire(s) de facteur de forme d'au moins 15 et de charge(s) plus fine(s) dont la taille des particules à 80% en poids est inférieure à 2 μm.  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.

L'invention a encore pour objet un emballage comportant un papier selon l'invention, notamment thermoscellé sur lui-même et contenant par exemple un produit alimentaire.  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.

L'invention a encore pour objet un procédé de fabrication d'un papier selon l'invention dans lequel on applique sur un substrat fibreux la composition de précouchage telle que définie plus haut.  The invention further relates to a process for producing a paper according to the invention in which the precoat composition as defined above is applied to a fibrous substrate.

Précouche precoat

La précouche peut être identique à la couche de recouvrement ou être une couche pigmentaire telle que définie ci-dessous.  The precoat may be identical to the covering layer or be a pigment layer as defined below.

La précouche est préférentiellement constituée d'un mélange d'au moins un latex et de charges encore parfois appelées « pigments ».  The precoat is preferably composed of a mixture of at least one latex and fillers still sometimes called "pigments".

Le document US 4 018 647 A décrit des exemples de latex. Le latex selon l'invention présente de préférence une Tg (température de transition vitreuse) mesurée selon la nonne ASTM E1356 inférieure à 25°C et plus préférentiellement inférieure à 10°C. Le latex peut être choisi parmi les latex de natures chimiques suivantes : styrène-butadiène, styrène-acrylique, acryliques, butyl-acrylate, butyl-acrylate-styrène-acrylonitrile, .... et plus particulièrement parmi les émulsions de styrène-butadiène. US 4,018,647 A discloses latex examples. 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.

Le taux de latex est de préférence d'au moins 15 parts en sec par rapport aux charges en sec (100 parts), préférentiellement d'au moins, voire de plus, de 25 et mieux 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

30 parts pour 100 parts de charge. 30 shares per 100 parts of charge.

Les charges sont de préférence constituées par un mélange de charge(s) lamellaire(s) et de charges plus fines, notamment non lamellaires.  The fillers are preferably constituted by a mixture of lamellar filler (s) and finer fillers, in particular non-lamellar fillers.

La ou les charges lamellaires sont des particules en forme de lamelles ayant un facteur de forme (rapport entre plus grande longueur et épaisseur) supérieur ou égal à 15, plus préférentiellement d'au moins 40 et de manière encore plus préférable d'au moins 60.  The lamellar filler (s) are lamellar particles having a form factor (greater length to thickness ratio) greater than or equal to 15, more preferably at least 40 and even more preferably at least 60 .

La précouche comporte un liant et un mélange de charge(s) lamellaire(s) de facteur de forme d'au moins 15 et de charge(s) plus fine(s), notamment non lamellaire(s), dont la taille des particules est à 80% en poids inférieure à 2 μm (mesurée selon la méthode The precoat comprises a binder and a mixture of lamellar filler (s) of form factor of at least 15 and finer filler (s), in particular non-lamellar (s), the particle size of which is at 80% by weight less than 2 μm (measured according to the method

Sédigraph IS013317-3). Sedigraph IS013317-3).

Pour avoir un mélange de charge(s) lamellaire(s) et de charge(s) plus fine(s) dont la taille de particule à 80% en poids est inférieure à 2 μm, la taille de particule à 80% en poids de charge(s) lamellaire(s) peut par exemple être supérieure ou égale à 2 μm. To obtain a mixture of lamellar filler (s) and finer filler (s) whose particle size at 80% by weight is less than 2 μm, the particle size at 80% by weight of For example, the lamellar charge (s) may be greater than or equal to 2 μm.

Selon un autre exemple moins de 80% en poids de particules lamellaires peut être inférieur à 2 μm. According to another example, less than 80% by weight of lamellar particles may be less than 2 μm.

, Autrement dit, pour avoir des charges plus fines que la ou les charge(s) Iamellaire(s), les charges plus fines peuvent selon un premier exemple présenter une taille de particules plus faible que celle des charges lamellaires à répartition en poids équivalente. Selon un deuxième exemple elles peuvent présenter une répartition en poids supérieure pour une même taille de particules que celle des charges lamellaires.  In other words, in order to have finer fillers than the non-cellular filler (s), 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.

Les charges plus fines peuvent être choisies parmi tous les autres pigments utilisés en papeterie, qui satisfont aux conditions de taille requises.  The finer fillers can be chosen from all the other pigments used in the paper industry, which satisfy the required size requirements.

Le pourcentage de charges lamellaires par rapport au total des charges peut varier de 10 à 90%, préférablement de 40 à 90% et encore plus préférablement de 60 à 90%. Les charges lamellaires peuvent être choisies par exemple parmi le kaolin et le talc, et leurs mélanges. 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.

Entre 30% et 80% en poids de particules lamellaires peuvent être de taille inférieure ou égale à 2 μm (mesurée selon la méthode Sédigraph ISO 13317-3).  Between 30% and 80% by weight of lamellar particles may be less than or equal to 2 μm in size (measured according to Sedigraph method ISO 13317-3).

Les particules de la ou des charges lamellaires sont notamment orientées sensiblement parallèlement à la surface du substrat.  The particles of the lamellar fillers are in particular oriented substantially parallel to the surface of the substrate.

Les particules de la ou des charges plus fines peuvent être choisies parmi le carbonate de calcium, le sulfate de baryum, la silice, le dioxyde de titane ou leurs mélanges... Elles sont caractérisées par une taille de particules à 80% en poids inférieure à 2 microns, mesurée selon la méthode Sédigraph ISO 13317-3  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

Les charges plus fines peuvent encore être choisies parmi tout autre pigment, incluant le kaolin, d'une finesse suffisante, notamment par une taille de particule à 95% en poids inférieure à 2 microns, mesurée selon la méthode Sédigraph 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.

Le liant est de préférence choisi parmi les latex précités mais d'autres liants ou co-liants tels que PVOH, amidon, CMC ... peuvent être utilisés. Le liant peut comporter un polymère de nature chimique non présente dans la couche de recouvrement.  The binder is preferably chosen from the abovementioned latices, but other binders or co-binders such as PVOH, starch, CMC, etc. may be used. The binder may comprise a polymer of a chemical nature not present in the covering layer.

Couche de recouyrement Coating layer

Les polymères utilisés pour obtenir la barrière à la vapeur et la thermoscellabilité sont préférentiellement choisis parmi les polymères ou copolymères à base de PVdC (chlorure de polyvinylidène) ou d'acrylique.  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.

Ces polymères sont appliqués purs ou en mélange avec des charges. Par « pur » on entend sans charge particulaire. On peut éventuellement ajouter d'autres produits à la dispersion de polymères tels que des agents de gestion du pH, des agents rhéologiques (viscosant par exemple), des agents anti-mousse, des agents de mouillabilité,  These polymers are applied pure or mixed with fillers. By "pure" is meant without particulate load. Other products may optionally be added to the polymer dispersion, such as pH-control agents, rheological agents (eg viscosizing agents), anti-foam agents, wetting agents,

L'utilisation de charges au sein de la couche de recouvrement peut notamment aider à réduire le risque de collage des spires de la bobine entre elles. Fabrication The use of fillers in the covering layer can in particular help reduce the risk of bonding the coils of the coil together. Manufacturing

De préférence, la couche de recouvrement est appliquée en ligne. L'invention permet d'obtenir de bons niveaux de barrière à la vapeur d'eau avec des poids de couche de recouvrement ne dépassant pas 10g/m2 en sec. Malgré la vitesse d'avancement relativement élevée du papier imposée par une machine industrielle de fabrication de papier, de l'ordre par exemple de 400 m/mn, le couchage en ligne d'une composition destinée à former la couche de recouvrement thermoscellante est possible, sous réserve d'utiliser une capacité de séchage suffisante pour sécher la couche avant l'opération de bobinage. En particulier, un poids de couche de recouvrement relativement faible peut faciliter le séchage en ligne, tout en apportant des propriétés barrières suffisantes. Preferably, 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. Despite the relatively high speed of the paper imposed by an industrial papermaking machine, of the order of eg 400 m / min, 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. In particular, a relatively low coverage layer weight can facilitate on-line drying, while providing sufficient barrier properties.

Le procédé en ligne permet d'accroître la productivité en éliminant les opérations de manutention liées au traitement hors ligne.  The online process increases productivity by eliminating off-line handling operations.

Après séchage du substrat fibreux, la feuille papetière peut passer sur cylindre frictionneur (« yankee cylinder » en anglais) pour améliorer l'état de surface de la feuille et ainsi la répartition de la première couche.  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.

La feuille peut être ensuite traitée en size-press ou tout autre équipement du même type. Pour éviter la trop grande pénétration de la précouche dans le support fibreux, une composition pigmentaire peut être préalablement utilisée afin de faire du « bouche- porage ».  The sheet can then be processed in size-press or any other equipment of the same type. To prevent the penetration of the precoat into the fibrous support, a pigment composition can be used beforehand in order to make "plugging".

Cette composition de bouche-porage peut contenir jusqu'à 20 parts en sec par rapport aux charges en sec de liant comme du latex, de nature chimique styrène-butadiène par exemple, et jusqu'à 20 parts en sec par rapport aux pigments secs de co-liants comme de l'amidon par exemple.  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.

Cette composition contient de préférence des charges qui sont de taille généralement inférieure à 2 microns. Ces charges peuvent être choisies, entre autres, parmi les kaolins ou les carbonates de calcium ou leurs mélanges.  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.

La précouche est appliquée sur le support ainsi traité à l'aide de n'importe laquelle des techniques de couchage qui peuvent être rencontrées sur les machines à papier. Cela peut être notamment un couchage à lame, de la rotogravure, du reverse gravure ou un couchage à la barre de Meyer. La précouche est déposée avec un poids de couche sec compris de préférence entre 4 et 12g/m2. 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 .

Cette précouche est ensuite séchée sans contact par un ou plusieurs fours infra- rouge et/ou un ou plusieurs fours à air chaud.  This precoat is then dried without contact by one or more infrared ovens and / or one or more hot air ovens.

Il n'est pas nécessaire d'avoir un très fort niveau de satinage avant l'application de la couche de recouvrement. Un niveau de 150 secondes Bekk est suffisant (mesuré selon la norme ISO 5627). La couche de recouvrement barrière à la vapeur d'eau et thermoscellante est appliquée par enduction en utilisant n'importe laquelle des techniques de couchage qui peuvent être rencontrées sur les machines à papier. Cela peut être par exemple un couchage à lame, de la rotogravure, du reverse gravure ou un couchage à barre de Meyer. La couche de recouvrement est déposée avec un poids de couche sec de préférence de 10g/m2 au maximum. It is not necessary to have a very high level of satin before the application of the covering layer. A level of 150 seconds Bekk is sufficient (measured according to ISO 5627). The water-vapor barrier and heat-sealing coating is coated by any of the coating techniques that can be found on paper machines. This can be for example a blade coating, rotogravure, reverse etching or Meyer bar coating. The covering layer is deposited with a dry layer weight preferably of 10 g / m 2 maximum.

Cette couche de recouvrement est ensuite suffisamment séchée, pour éviter que les spires ne collent au niveau de la bobine d'enroulage, à l'aide d'un ou plusieurs fours infra-rouge et/ou d'un ou plusieurs fours à air chaud.  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 .

Un couchage sur la face opposée peut être réalisé pour renforcer la barrière et/ou pour apporter d'autres fonctionnalités telles que l'imprimabilité, la correction du curl, ....  A coating on the opposite side can be made to reinforce the barrier and / or to provide other features such as printability, curl correction, ....

Le papier ainsi produit peut éventuellement être calandré en ligne pour réduire la rugosité de surface avant d'être enroulé.  The paper thus produced can optionally be calendered in line to reduce the surface roughness before being rolled up.

Le grammage final du papier peut être compris entre 45 et 200g/m2.The final basis weight of the paper may be between 45 and 200 g / m 2 .

La barrière à la vapeur d'eau mesurée selon la norme ASTM F1249 à 38°C et 90% d'humidité relative est inférieure à 150g/m2/24h, et préféremiellement à 100g/m2/24h. Exemple 1 : 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 préféremiellement to 100g / m 2 / 24h. Example 1

Un support fibreux de grammage 55g/m2 est produit sur une machine à papier fonctionnant à 400m/min. La machine à papier est équipée d'un rouleau frictionneur placé avant la size-press. A fibrous support of 55 g / m 2 is produced on a paper machine operating at 400 m / min. The paper machine is equipped with a Yankee roller placed before the size-press.

Le support fibreux est d'abord frictionné puis traité en ligne sur ses deux faces par size-press avec une composition pigmentaire bouche-pores, contenant 100 parts sec de kaolin de type Amazon Premium (Cadam), et un mélange d'amidon Merifilm 104 (Tate&Lyle) et de latex de type DL950 (Dow) à hauteur de 20 parts sec par rapport au kaolin sec Le traitement appliqué est de 5g/m2 sec au total. 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.

Il est ensuite enduit à l'aide d'une coucheuse à barre de Meyer avec une formulation de précouche contenant un mélange de charges lamellaires et de charges particulaires plus fines et un latex de nature chimique styrène-butadiène de Tg=7°C (DL950 de Dow Chemical) et séché sans contact sur un four à infra-rouge puis un four à air chaud. Il est ensuite enroulé en bobine sans autre traitement. Le poids sec de la précouche appliquée est de 7g/m2 et sa formulation est donnée dans le tableau ci-dessous : It is then coated using a Meyer bar coater with a precoat formulation containing a mixture of lamellar fillers and finer particulate fillers and a styrene-butadiene chemical latex of Tg = 7 ° C (DL950 Dow Chemical) and dried without contact on an infra-red oven and then an oven hot air. It is then wound into a reel without further processing. The dry weight of the precoat applied is 7g / m 2 and its formulation is given in the table below:

Figure imgf000011_0001
La taille de particules à 97% en poids d'Amazon Premium, mesurée selon la méthode Sédigraph ISO 13317-3, est inférieure à 2 microns.
Figure imgf000011_0001
The particle size at 97% by weight of Amazon Premium, measured according to Sedigraph method ISO 13317-3, is less than 2 microns.

Le facteur de forme des particules de Capim NP est de 28.  The Capim NP Particle Form Factor is 28.

La barrière à la vapeur d'eau est mesurée par un appareil de marque Mocon, de type Permatran 3/61 selon la norme ASTM F1249 à 38°C et 90% d'humidité relative pour déterminer l'apport de barrière de cette précouche. Elle est mesurée à 334 +/- 13g/m2/24h. Après enduction de la couche de recouvrement on obtient une barrière inférieure à 150 g/m2/24h. 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.

Exemple 2 Example 2

Le support fibreux est d'abord frictionné puis traité en ligne sur ses deux faces par size-press avec une composition pigmentaire bouche-pores contenant 100 parts sec de kaolin de type Amazon Premium (Cadam) et un mélange d'amidon Merifilm 104  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

(Tate&Lyle) et de latex de type DL950 (Dow) à hauteur de 20 parts sec par rapport au kaolin sec. Le traitement appliqué est de 5g/m2 sec au total. (Tate & Lyle) and latex type DL950 (Dow) at 20 dry parts compared to dry kaolin. The applied treatment is 5g / m 2 dry in total.

II est ensuite enduit à l'aide d'une coucheuse à barre de Meyer avec une formulation contenant un mélange de charges lamellaires et de charges particulaires plus fines et un latex de nature chimique styrène-butadiène de Tg=7°C (DL950 de Dow  It is then coated using a Meyer bar coater with a formulation containing a mixture of lamellar fillers and finer particulate fillers and a styrene-butadiene chemical latex of Tg = 7 ° C (Dow DL950).

Chemical) et séché sans contact sur un four à infra-rouge puis un four à air chaud. Il est ensuite enroulé en bobine sans autre traitement. Le poids sec de la précouche appliquée est de 7g/m2 et sa formulation est donnée dans le tableau ci-dessous : Chemical) and dried without contact on an infrared oven and then a hot air oven. It is then wound into a reel without further processing. The dry weight of the precoat applied is 7g / m 2 and its formulation is given in the table below:

Figure imgf000012_0001
La taille de particules à 95% en poids d'Hydrocarb 95, mesurée selon la méthode Sédigraph ISO 13317-3, est inférieure à 2 microns.
Figure imgf000012_0001
The particle size at 95% by weight of Hydrocarb 95, measured according to the Sedigraph method ISO 13317-3, is less than 2 microns.

La barrière à la vapeur d'eau est mesurée par un appareil de marque Mocon, de type Permatran 3/61 selon la norme ASTM F1249 à 38°C et 90% d'humidité relative pour déterminer l'apport de barrière de cette précouche. Elle est mesurée à 315 +/- 9g/m2/24h. Après enduction de la couche de recouvrement on obtient une barrière inférieure à 150 g/m2/24h. 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 315 +/- 9g / m 2 / 24h. After coating of the covering layer, a barrier of less than 150 g / m 2 / 24h is obtained.

Exemple 3 : Example 3

Un papier est produit en ligne dans les mêmes conditions que dans l'exemple 1. Mais suite à la dépose de la précouche, il est enduit en ligne d'une couche de recouvrement constituée d'une dispersion de copolymère de PVdC (Diofan A297 de 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

Solvay), et séché sans contact sur un four à infra-rouges puis un four à air chaud. H est ensuite enroulé en bobine sans autre traitement et aucun collage entre spire n'est observé.Solvay), and dried without contact on an infrared oven and then a hot air oven. H is then wound into a reel without further processing and no gluing between turns is observed.

Le poids sec de la couche de recouvrement est de 6.5g/m2. The dry weight of the covering layer is 6.5 g / m 2 .

La barrière à la vapeur d'eau est mesurée par un appareil de marque Mocon, de type Permatran 3/61 selon la norme ASTM F1249 à 38°C et 90% d'humidité relative. 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.

Elle est mesurée à 21,0 +/-2.4g/m2/24h. It is measured at 21.0 +/- 2.4g / m 2 / 24h.

Le scellage est ensuite simulé sur une thermoscelleuse de laboratoire en collant la face recouverte de la couche de recouvrement sur elle-même à 110°C, sous 3bars et pendant 0.5 seconde. Puis la force nécessaire pour détacher les papiers collés sur des échantillons de largeur de 15mm est ensuite mesurée sous un angle de 90 degrés selon la norme Tappi T540 à une vitesse de 100mm/min. 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.

On obtient une force de scellage de 3.5N/15rnrn.  A sealing force of 3.5N / 15rnrn is obtained.

L'invention n'est pas limitée aux exemples décrits.  The invention is not limited to the examples described.

En résumé, l'invention peut présenter une ou plusieurs des caractéristiques avantageuses suivantes :  In summary, the invention may have one or more of the following advantageous features:

- le poids de la couche de recouvrement ne dépasse pas 10g/m2 en sec, notamment est strictement inférieur à 10g/m2, 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 ,

- la couche de recouvrement comporte ou est constituée par un polymère thermoscellable,  the covering layer comprises or consists of a heat-sealable polymer,

- la ou les charge(s) lamellaire(s) et la ou les charge(s) plus fine(s) sont de même nature,  the lamellar charge (s) and the finer charge (s) are of the same nature,

- le facteur de forme des particules de charge(s) lamellaire(s) est d'au moins 40, plus préférentiellement d'au moins 60,  the form factor of the lamellar filler particles is at least 40, more preferably at least 60,

- la ou les charge(s) plus fine(s) sont non lamellaire(s),  - the finer load (es) are non-lamellar (s),

- la ou les charge(s) plus fine(s) sont lamellaire(s),  - the finer load (s) are lamellar (s),

- la ou les charge(s) plus fine(s) ont une taille de particule à 95% en poids, inférieure à 2 microns, mesurée selon la méthode Sédigraph ISO 13317-3,  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,

- la ou les charges lamellaires sont minérales,  the lamellar charge or fillers are mineral,

- la ou les charge(s) plus fine(s) sont minérale(s),  - the finer load (s) are mineral (s),

- la ou les charge(s) lameUaire(s) sont choisie(s) parmi les kaolins et le talc et leurs mélanges,  the blade filler (s) are chosen from kaolin and talc and mixtures thereof,

- la ou les charge(s) plus fine(s) sont choisie(s) parmi les kaolins, carbonate de calcium, le sulfate de baryum, la silice, le dioxyde de titane et leurs mélanges,  the finer filler (s) are chosen from kaolin, calcium carbonate, barium sulfate, silica, titanium dioxide and mixtures thereof,

- la ou les charge(s) plus fine(s) sont choisie(s) parmi les kaolins, - the finest load (s) are chosen from among the kaolins,

- le poids sec de charge(s) lamellaire(s) est compris entre 3 et 58% du poids sec total de la précouche, le poids de charge(s) lamellaire(s) étant de préférence supérieur à celui des charges plus fines, 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,

- le poids sec de charge(s) plus fine(s) est compris entre 3 et 58% du poids sec total de la précouche, - le pourcentage de charge(s) lamellaire(s), exprimé en poids sec, par rapport au total des charges, exprimé en poids sec, est compris entre 10 et 90%, préférablement entre 40 et 90% et encore plus préférablement entre 60 et 90%, 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%,

- le liant présente une température de transition vitreuse Tg inférieure ou égale à 25°C et de manière plus préférée inférieure à 10°C, the binder has a glass transition temperature T g less than or equal to 25 ° C and more preferably less than 10 ° C,

- le liant est choisi parmi les latex de nature chimique styrène-butadiène, styrène-acrylique, acryliques, butyl-acrylate, butyl-arcylate-styrène-acrylonitrile, et leurs mélanges,  the binder is chosen from styrene-butadiene, styrene-acrylic, acrylic, butyl-acrylate, butyl-aryl-styrene-acrylonitrile, and mixtures thereof,

- le liant est choisi parmi les latex de nature chimique styrène-butadiène, - le liant est introduit sous forme de latex,  the binder is chosen from styrene-butadiene chemical latexes, the binder is introduced in the form of a latex,

- la précouche comporte au moins 15 parts en sec de liant par rapport au poids en charges à sec (100 parts), et préférentiellement de plus de 25, mieux 30 parts,  the precoat has at least 15 parts by weight of binder relative to the weight in dry charges (100 parts), and preferably of more than 25, more preferably 30 parts,

- le liant comporte un polymère de nature chimique non présente dans la couche de recouvrement,  the binder comprises a polymer of chemical nature not present in the covering layer,

- la couche de recouvrement est sensiblement sans charge,  the covering layer is substantially free of charge,

- la couche de recouvrement est l'unique couche recouvrant la précouche, the covering layer is the single layer covering the precoat,

- la couche de recouvrement comporte un ou plusieurs polymères choisis parmi les copolymères à base de PVdC ou de styrène-acrylique et leurs mélanges, the covering layer comprises one or more polymers chosen from copolymers based on PVdC or styrene-acrylic and their mixtures,

- la quantité de précouche est inférieure ou égale à 12g/m2 en poids sec, - le papier comporte une couche d'imprimabilité sur la face du substrat opposée à celle portant la précouche et la couche de recouvrement, the amount of precoat is less than or equal to 12 g / m 2 by dry weight, the paper comprises a printability layer on the face of the substrate opposite to that carrying the precoat and the covering layer,

- le substrat porte deux précouches identiques sur ses faces opposées, the substrate has two identical pre-layers on its opposite faces,

- le substrat porte deux précouches de natures différentes sur ses faces opposées, the substrate carries two precolors of different natures on its opposite faces,

- une composition bouche-pores est appliquée sur le substrat, et la précouche est appliquée sur la composition bouche-pores, la composition bouche-pores étant appliquée de préférence par size-press ou film-press,  - a 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,

- le grammage du substrat fibreux est compris entre 25 et 180g/m2,the grammage of the fibrous substrate is between 25 and 180 g / m 2 ,

- le papier est thermoscellable, notamment à partir de 90°C, lorsque le scellage est effectué sur des pinces chaudes, sous 3 bars et durant 0.5s, 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,

- la perméabilité à la vapeur d'eau du papier barrière est inférieure à 100 g/m2/24k - entre 30% et 80% en poids de particules lamellaires sont de taille inférieure ou égale à 2μm (mesurée selon la méthode Sédigraph ISO 13317-3), 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 μm in size (measured according to the Sedigraph method ISO 13317-3),

- le papier est thermoscellable, notamment sur lui-même, à une cadence de fabrication supérieure ou égale à 40 sacs par minute, sur des machine d'emballage verticales de type VFFS (Vertical Form, Fill and Seal), le long de lignes de scellage longitudinales de 330 mm par sac,  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,

- le papier est thermoscellable sur lui-même avec une force de scellage supérieure ou égale à 2 N/15mm, mesurée sous un angle de 90 degrés selon la norme Tappi T540 à une vitesse de lOOmm/min, lorsque le scellage est effectué sur des pinces chaudes, sous 3 bars, et durant 0,5 s,  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,

- la température du substrat fibreux lors de l'application de la précouche est supérieure ou égale à 50°C,  the temperature of the fibrous substrate during the application of the precoat is greater than or equal to 50 ° C.,

- la température du substrat fibreux lors de l'application de la couche de recouvrement est supérieure ou égale à 70°C,  the temperature of the fibrous substrate during the application of the covering layer is greater than or equal to 70 ° C.,

- le grammage final du papier est compris entre 45 et 200g/m2. the final grammage of the paper is between 45 and 200 g / m 2 .

L'expression « comportant un » doit être compris comme étant synonyme de « comprenant au moins un ».  The expression "comprising one" must be understood as being synonymous with "comprising at least one".

Claims

REVENDICATIONS 1. Papier comportant : 1. Paper comprising: - un substrat fibreux,  a fibrous substrate, - une précouche comportant un liant et un mélange de charge(s) lamellaire(s) de facteur de forme d'au moins 15 et de charge(s) plus fine(s), notamment non lamellaire(s), dont la taille des particules est à 80% en poids inférieure à 2 μm (mesurée selon la méthode Sédigraph IS013317-3),  a prelayer comprising a binder and a mixture of lamellar filler (s) of form factor of at least 15 and finer (s) filler (s), in particular non-lamellar (s), the size of which particles is 80% by weight less than 2 μm (measured according to the Sedigraph method IS013317-3), - au moins une couche de recouvrement appliquée sur la précouche, le papier présentant une perméabilité à la vapeur d'eau d'au plus 150 g/m2/24h et de préférence inférieure à 100g /m2/24h, mesurée selon la norme ASTM F 1249 dans des conditions dites tropicales de 38°C et 90% d'humidité relative at least one covering layer applied to the precoat, the paper having a permeability to water vapor of at most 150 g / m 2 / 24h and preferably less than 100 g / m 2 / 24h, measured according to the standard ASTM F 1249 under tropical conditions of 38 ° C and 90% relative humidity 2. Papier selon la revendication 1, le poids de la couche de recouvrement ne dépassant pas 10g/m2 en sec, notamment étant strictement inférieur à 10 g/m2. 2. Paper according to claim 1, the weight of the covering layer not exceeding 10g / m 2 in dry, in particular being strictly less than 10 g / m 2 . 3. Papier selon la revendication 2, la couche de recouvrement comportant un polymère thermoscellable, voire étant constituée par un polymère thermoscellable.  3. Paper according to claim 2, the covering layer comprising a heat-sealable polymer, or even consisting of a heat-sealable polymer. 4. Papier selon l'une des revendications 1 ou 2, la ou les charge(s) lamellaire(s) et la ou les charge(s) plus fine(s) étant de même nature.  4. Paper according to one of claims 1 or 2, the lamellar load (s) and the finer (s) load (s) being of the same nature. 5. Papier selon l'une quelconque des revendications précédentes, le facteur de forme des particules de charge(s) lamellaire(s) étant d'au moins 40, plus préférentiellement d'au moins 60.  5. Paper according to any one of the preceding claims, the form factor of the lamellar filler particles (s) being at least 40, more preferably at least 60. 6. Papier selon l'une quelconque des revendications précédentes, la ou les charge(s) plus fine(s) ayant une taille de particule à 95% en poids inférieure à 2 microns, mesurée selon la méthode Sédigraph ISO 13317-3.  6. Paper according to any one of the preceding claims, the finer load (s) having a particle size of 95% by weight less than 2 microns, measured according to the method Sedigraph ISO 13317-3. 7. Papier selon l'une quelconque des revendications précédentes, la ou les charges lamellaires étant minérales.  7. Paper according to any one of the preceding claims, the lamellar fillers being mineral. 8. Papier selon l'une quelconque des revendications précédentes, la ou les charge(s) plus fine(s) étant minérale(s).  8. Paper according to any one of the preceding claims, the one or more finer load (s) being mineral (s). 9. Papier selon l'une quelconque des revendications précédentes, la ou les charge(s) lamellaire(s) étant choisie(s) parmi les kaolins et le talc et leurs mélanges. 9. Paper according to any one of the preceding claims, the lamellar filler (s) being chosen from kaolins and talc and mixtures thereof. 10. Papier selon l'une quelconque des revendications précédentes, la ou les charge(s) plus fîne(s) étant choisie(s) parmi les kaolins, carbonate de calcium, le sulfate de baryum, la silice, le dioxyde de titane et leurs mélanges. 10. Paper according to any one of the preceding claims, wherein the filler (s) more string (s) being chosen (s) from kaolins, calcium carbonate, barium sulfate, silica, titanium dioxide and their mixtures. 11. Papier selon l'une quelconque des revendications précédentes, la ou les charge(s) plus fine(s) étant choisie(s) parmi les kaolins.  11. Paper according to any one of the preceding claims, the finest load (s) being (are) chosen from kaolins. 12. Papier selon l'une quelconque des revendications précédentes, le poids sec de charge(s) lamellaire(s) étant compris entre 3 et 58% du poids sec total de la précouche, le poids de charge(s) lamellaire(s) étant de préférence supérieur à celui des charges plus fines.  12. Paper according to any one of the preceding claims, the dry weight of lamellar filler (s) being between 3 and 58% of the total dry weight of the precoat, the weight of filler (s) lamellar (s) being preferably higher than that of the finer fillers. 13. Papier selon l'une quelconque des revendications précédentes le poids sec de charge(s) plus fine(s) étant compris entre 3 et 58% du poids sec total de la précouche.  13. Paper according to any one of the preceding claims, the dry weight of finer filler (s) being between 3 and 58% of the total dry weight of the precoat. 14. Papier selon l'une quelconque des revendications précédentes, le pourcentage de charge(s) lamellaire(s), exprimé en poids sec, par rapport au total des charges, exprimé en poids sec, étant compris entre 10 et 90%, préférablement entre 40 et 90% et encore plus préférablement entre 60 et 90%.  14. Paper according to any one of the preceding claims, the percentage of filler (s) lamellar (s), expressed by dry weight, relative to the total load, expressed in dry weight, being between 10 and 90%, preferably between 40 and 90% and even more preferably between 60 and 90%. 15. Papier selon l'une quelconque des revendications précédentes, le liant présentant une température de transition vitreuse Tg inférieure ou égale à 25°C et de manière plus préférée inférieure à 10°C. 15. Paper according to any one of the preceding claims, the binder having a glass transition temperature T g less than or equal to 25 ° C and more preferably less than 10 ° C. 16. Papier selon l'une quelconque des revendications précédentes, le liant étant choisi parmi les latex de nature chimique styrène-butadiène, styrène-acrylique, acryliques, butyl-acrylate, butyl-arcylate-styrène-acrylonitrile, et leurs mélanges.  16. Paper according to any one of the preceding claims, the binder being selected from styrene-butadiene, styrene-acrylic, acrylic, butyl acrylate, butyl-aryl-styrene-acrylonitrile, and mixtures thereof. 17. Papier selon l'une quelconque des revendications précédentes, le liant étant choisi parmi les latex de nature chimique styrène-butadiène.  17. Paper according to any one of the preceding claims, the binder being selected from styrene-butadiene chemical latexes. 18. Papier selon l'une quelconque des revendications précédentes, le liant étant introduit sous forme de latex.  18. Paper according to any one of the preceding claims, the binder being introduced in latex form. 19. Papier selon l'une quelconque des revendications précédentes, comportant dans la précouche au moins 15 parts en sec de liant par rapport au poids en charges à sec, (100 parts) et préférentiellement de plus de 25, mieux 30 parts.  19. Paper according to any one of the preceding claims, comprising in the precoat at least 15 parts by dry binder with respect to the weight of dry fillers (100 parts) and preferably of more than 25, more preferably 30 parts. 20. Papier selon l'une quelconque des revendications précédentes, le liant comportant un polymère de nature chimique non présente dans la couche de recouvrement. 20. Paper according to any one of the preceding claims, the binder comprising a polymer of chemical nature not present in the covering layer. 21. Papier selon l'une quelconque des revendications précédentes, la couche de recouvrement étant sensiblement sans charge. 21. Paper according to any one of the preceding claims, the covering layer being substantially free of charge. 22. Papier selon l'une quelconque des revendications précédentes, la couche de recouvrement étant l'unique couche recouvrant la précouche.  22. Paper according to any one of the preceding claims, the covering layer being the single layer covering the precoat. 23. Papier selon l'une quelconque des revendications précédentes, la couche de recouvrement comportant un ou plusieurs polymères choisis parmi les copolymères à base de PVdC ou de styrène-acrylique et leurs mélanges.  23. Paper according to any one of the preceding claims, the covering layer comprising one or more polymers chosen from copolymers based on PVdC or styrene-acrylic and mixtures thereof. 24. Paper selon l'une quelconque des revendications précédentes, la quantité de précouche étant inférieure ou égale à 12g/m2 en poids sec. 24. Paper according to any one of the preceding claims, the amount of pre-coat being less than or equal to 12g / m 2 dry weight. 25. Papier selon l'une quelconque des revendications précédentes, comportant une couche d'imprimabilité sur la face du substrat opposée à celle portant la précouche et la couche de recouvrement.  25. Paper according to any one of the preceding claims, comprising a printability layer on the face of the substrate opposite to that carrying the precoat and the covering layer. 26. Papier selon l'une quelconque des revendications précédentes, le substrat portant deux précouches identiques sur ses faces opposées.  26. Paper according to any one of the preceding claims, the substrate bearing two identical pre-layers on its opposite faces. 27. Papier selon l'une quelconque des revendications 1 à 25, le substrat portant deux précouches de natures différentes sur ses faces opposées.  27. Paper according to any one of claims 1 to 25, the substrate carrying two precoats of different natures on its opposite faces. 28. Papier selon l'une quelconque des revendications précédentes, une composition bouche-pores étant appliquée sur le substrat, et la précouche étant appliquée sur la composition bouche-pores, la composition bouche-pores étant appliquée de préférence par size-press ou film-press.  28. Paper according to any one of the preceding claims, a pore-filling composition being applied to the substrate, and the precoat being applied to the pore-filling composition, the pore-filling composition being preferably applied by size-press or film. -Press. 29. Papier selon l'une quelconque des revendications précédentes, le grammage du substrat fibreux étant compris entre 25 et 180g/m2. 29. Paper according to any one of the preceding claims, the grammage of the fibrous substrate being between 25 and 180g / m 2 . 30. Papier selon l'une quelconque des revendications précédentes, le papier étant thermoscellable, notamment à partir de 90°C, lorsque le scellage est effectué sur des pinces chaudes, sous 3 bars et durant 0.5s.  30. Paper according to any one of the preceding claims, the paper being heat-sealable, especially from 90 ° C, when the sealing is performed on hot tongs at 3 bars and for 0.5s. 31. Papier selon l'une quelconque des revendications précédentes, le grammage final du papier étant compris entre 45 et 200g/m2. 31. Paper according to any one of the preceding claims, the final basis weight of the paper being between 45 and 200 g / m 2 . 32. Papier précouché convenant à la fabrication d'un papier tel que défini à l'une quelconque des revendications 1 à 31, présentant une perméabilité à la vapeur d'eau d'au plus 150g/m2/24h et préférentiellement inférieure à 100g/m2/24h selon la norme ASTM F- 1249 à 38°C et 90% d'humidité relative. 32. Precoated paper suitable for the manufacture of a paper as defined in any one of claims 1 to 31, having a permeability to water vapor of at most 150g / m 2 / 24h and preferably less than 100g / m 2 / 24h according to ASTM F-1249 at 38 ° C and 90% relative humidity. 33. Papier précouché selon la revendication 32, le papier précouché étant non calandré. 33. Precoated paper according to claim 32, the precoated paper being non-calendered. 34. Emballage comportant un papier tel que défini à Tune des revendications 1 à 33.  34. A package comprising a paper as defined in one of claims 1 to 33. 35. Emballage selon la revendication 34, le papier étant thermoscellé sur lui- même.  35. Package according to claim 34, the paper being heat-sealed on itself. 36. Emballage selon l'une quelconque des revendications 34 ou 35, contenant un produit alimentaire.  36. Packaging according to any one of claims 34 or 35, containing a food product. 37. Procédé de fabrication d'un papier selon l'une quelconque des revendications 1 à 33, dans lequel on applique sur un substrat fibreux une composition comportant un liant sous forme de latex et une dispersion d'un mélange de charge(s) lamellaire(s) de facteur de forme d'au moins 15 et de charge(s) plus fine(s) dont la taille des particules à 80% en poids est inférieure à 2 um.  37. A method of manufacturing a paper according to any one of claims 1 to 33, wherein is applied to a fibrous substrate a composition comprising a binder in the form of latex and a dispersion of a mixture of filler (s) lamellar (s) of form factor of at least 15 and finer filler (s) whose particle size at 80% by weight is less than 2 μm.
PCT/EP2015/067438 2014-07-30 2015-07-29 Heat-sealing barrier paper Ceased WO2016016340A1 (en)

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JP2017526012A JP2017524081A (en) 2014-07-30 2015-07-29 Heat-sealable barrier paper
CA2956766A CA2956766A1 (en) 2014-07-30 2015-07-29 Heat-sealing barrier paper
EP15752945.4A EP3186442B2 (en) 2014-07-30 2015-07-29 Heat-sealing barrier paper
BR112017001817-9A BR112017001817B1 (en) 2014-07-30 2015-07-29 Paper, pre-coated paper suitable for papermaking, packaging and papermaking process
FIEP15752945.4T FI3186442T4 (en) 2014-07-30 2015-07-29 Heat-sealing barrier paper
CN201580053261.2A CN107075810B (en) 2014-07-30 2015-07-29 Heat Seal Barrier Paper
US15/500,334 US20170211237A1 (en) 2014-07-30 2015-07-29 Heat-sealing barrier paper
ZA2017/00739A ZA201700739B (en) 2014-07-30 2017-01-30 Heat-sealing barrier paper

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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3024468B1 (en) * 2014-07-30 2019-05-17 Munksjö Oyj METHOD FOR MANUFACTURING THERMOSCELLANT BARRIER PAPER
CN110312833B (en) 2017-02-27 2022-06-14 维实洛克Mwv有限责任公司 Heat sealable barrier paperboard
DE102018117071A1 (en) * 2018-07-13 2020-01-16 Mitsubishi Hitec Paper Europe Gmbh Heat sealable barrier paper
PL246367B1 (en) * 2018-09-24 2025-01-13 Silbo Spolka Z Ograniczona Odpowiedzialnoscia Compostable material, especially intended for packaging, and a method of producing compostable material
JP7081042B2 (en) 2019-03-18 2022-06-06 日本製紙株式会社 Paper barrier material
ES2924344T5 (en) 2019-04-26 2025-09-25 Neenah Gessner Gmbh Heat-sealable wrapping paper
DE102019118425A1 (en) * 2019-07-08 2021-01-14 Constantia Pirk Gmbh & Co. Kg Multifunctional barrier paper and process for its production
IT201900012999A1 (en) * 2019-07-26 2021-01-26 Francesco Toschi Machine and method for waterproof coupling
EP4115015A1 (en) 2020-03-04 2023-01-11 WestRock MWV, LLC Coffee stain-resistant cellulosic structures and associated containers and methods
WO2021260043A1 (en) 2020-06-23 2021-12-30 Sappi Netherlands Services B.V. Barrier paper or board
US11549216B2 (en) * 2020-11-11 2023-01-10 Sappi North America, Inc. Oil/grease resistant paper products
FI130515B (en) * 2020-12-23 2023-10-19 Ch Polymers Oy A method for producing a heat sealable multi-layer paperboard and a heat sealable multi-layer paperboard obtainable by the method
CN113152147A (en) * 2021-04-22 2021-07-23 叶子包装(美国)有限公司 Environment-friendly straw paper, preparation method thereof and paper straw processing technology
EP4180574B1 (en) 2021-11-15 2024-10-16 Tetra Laval Holdings & Finance S.A. Barrier-coated cellulose-based substrate for laminated packaging material

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653870A (en) 1949-10-22 1953-09-29 Richard P Kast High-strength paper and method of making
US4018647A (en) 1973-06-18 1977-04-19 Chemische Industrie Aku-Goodrick B.V. Process for the impregnation of a wet fiber web with a heat sensitized foamed latex binder
EP0761876A1 (en) 1995-09-08 1997-03-12 Bernhard Dettling Paper or cardboard
WO2000005311A1 (en) * 1998-07-22 2000-02-03 Imerys Pigments, Inc. An engineered kaolin pigment composition for paper coating
US20040121079A1 (en) 2002-04-12 2004-06-24 Robert Urscheler Method of producing a multilayer coated substrate having improved barrier properties
US20040241475A1 (en) 2003-05-27 2004-12-02 Patrick Morabito Barrier coatings for oil and grease resistance
WO2008141771A1 (en) * 2007-05-18 2008-11-27 Topchim N.V. Coating composition for papers providing excellent water vapor barrier properties
WO2009112255A1 (en) 2008-03-14 2009-09-17 Tetra Laval Holdings & Finance S.A. Packaging laminate, method for manufacturing of the packaging laminate and packaging container produced therefrom
WO2009117040A1 (en) 2008-03-21 2009-09-24 Meadwestvaco Corporation Basecoat and associated paperboard structure
WO2010052571A2 (en) 2008-11-07 2010-05-14 The Bankruptcy Estate Of Stromsdal Oyj Coated recyclable paper or paperboard and methods for their production
WO2011056130A1 (en) 2009-11-03 2011-05-12 Stora Enso Oyj A coated substrate, a process for production of a coated substrate, a package and a dispersion coating
WO2014005697A2 (en) 2012-07-03 2014-01-09 Huhtamäki Oyj A recyclable sheet material and a container thereof
US20140113080A1 (en) 2007-12-26 2014-04-24 Centre National De La Recherche Scientifique (Cnrs) Film having water, grease, gas and water vapor barrier properties

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3297109B2 (en) * 1992-12-08 2002-07-02 リンテック株式会社 Water disintegrating moisture-proof paper with light-shielding and heat-sealing properties
JPH07133600A (en) * 1993-09-17 1995-05-23 Nippon Paper Ind Co Ltd Readily disintegrable and heat-sealing moisture-proof paper
DE19753266B4 (en) * 1997-12-01 2010-10-07 H.B. Fuller Licensing & Financing, Inc., St. Paul Method for connecting airtight materials
JP2000265395A (en) * 1999-03-12 2000-09-26 Oji Paper Co Ltd Moistureproof laminate
FI117622B (en) * 2001-07-13 2006-12-29 Stora Enso Oyj Polymer-coated packaging material for heat sealing, its method of preparation and its use for a sealed package
JP4532064B2 (en) * 2002-10-09 2010-08-25 レンゴー株式会社 Moisture-proof paper
JP2005171454A (en) * 2003-12-15 2005-06-30 Oji Paper Co Ltd Moisture-proof laminate
KR101098261B1 (en) 2004-07-02 2011-12-23 오지 세이시 가부시키가이샤 Coated paper for printing
EP1908991B1 (en) 2005-07-19 2009-09-30 Asahi Kasei Chemicals Corporation Gear
CN101389727B (en) * 2006-02-23 2013-02-06 米德韦斯瓦科公司 Method for treating a substrate
JP2009024288A (en) * 2007-07-20 2009-02-05 Oji Paper Co Ltd Method for manufacturing moisture-proof paper
JP2008105428A (en) * 2007-11-12 2008-05-08 Mitsubishi Plastics Ind Ltd Polylactic acid-based laminated biaxially stretched film
JP5119134B2 (en) * 2008-11-21 2013-01-16 旭化成パックス株式会社 Laminated film for highly sublimable substance, packaging bag using the same, wound body, and method for producing laminated film for highly sublimable substance
CN104080607B (en) 2011-11-10 2016-11-09 日本制纸株式会社 Impermeabilisation packaging material made of paper
FI125255B (en) * 2012-06-08 2015-08-14 Upm Kymmene Corp Process and system for the manufacture of packaging materials and packaging materials and packaging

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653870A (en) 1949-10-22 1953-09-29 Richard P Kast High-strength paper and method of making
US4018647A (en) 1973-06-18 1977-04-19 Chemische Industrie Aku-Goodrick B.V. Process for the impregnation of a wet fiber web with a heat sensitized foamed latex binder
EP0761876A1 (en) 1995-09-08 1997-03-12 Bernhard Dettling Paper or cardboard
WO2000005311A1 (en) * 1998-07-22 2000-02-03 Imerys Pigments, Inc. An engineered kaolin pigment composition for paper coating
US20040121079A1 (en) 2002-04-12 2004-06-24 Robert Urscheler Method of producing a multilayer coated substrate having improved barrier properties
US20040241475A1 (en) 2003-05-27 2004-12-02 Patrick Morabito Barrier coatings for oil and grease resistance
WO2008141771A1 (en) * 2007-05-18 2008-11-27 Topchim N.V. Coating composition for papers providing excellent water vapor barrier properties
US20140113080A1 (en) 2007-12-26 2014-04-24 Centre National De La Recherche Scientifique (Cnrs) Film having water, grease, gas and water vapor barrier properties
WO2009112255A1 (en) 2008-03-14 2009-09-17 Tetra Laval Holdings & Finance S.A. Packaging laminate, method for manufacturing of the packaging laminate and packaging container produced therefrom
WO2009117040A1 (en) 2008-03-21 2009-09-24 Meadwestvaco Corporation Basecoat and associated paperboard structure
WO2010052571A2 (en) 2008-11-07 2010-05-14 The Bankruptcy Estate Of Stromsdal Oyj Coated recyclable paper or paperboard and methods for their production
WO2011056130A1 (en) 2009-11-03 2011-05-12 Stora Enso Oyj A coated substrate, a process for production of a coated substrate, a package and a dispersion coating
WO2014005697A2 (en) 2012-07-03 2014-01-09 Huhtamäki Oyj A recyclable sheet material and a container thereof

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
BOLLSTROM, ROGER ET AL.: "Barrier properties created by dispersion coating", TAPPI J, vol. 12, no. 4, May 2013 (2013-05-01), pages 45 - 51, XP055683276
IMERYS KAOLIN: "BARRISURF FX", KAOLIN PRODUCT BULLETIN, May 2015 (2015-05-01), XP055683283, Retrieved from the Internet <URL:https://imerys-kaolin.com/wp-content/uploads/sites/2/2016/12/Barrisurf.pdf>

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