WO2016016340A1 - Papier barriere thermoscellant - Google Patents
Papier barriere thermoscellant Download PDFInfo
- 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
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Classifications
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- 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
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2956766A CA2956766A1 (fr) | 2014-07-30 | 2015-07-29 | Papier barriere thermoscellant |
US15/500,334 US20170211237A1 (en) | 2014-07-30 | 2015-07-29 | Heat-sealing barrier paper |
CN201580053261.2A CN107075810B (zh) | 2014-07-30 | 2015-07-29 | 热密封型屏障纸 |
JP2017526012A JP2017524081A (ja) | 2014-07-30 | 2015-07-29 | ヒートシール性バリア紙 |
BR112017001817-9A BR112017001817B1 (pt) | 2014-07-30 | 2015-07-29 | Papel, papel pré-revestido adequado para a fabricação de um papel, embalagem e processo para a fabricação de papel |
EP15752945.4A EP3186442B2 (fr) | 2015-07-29 | Papier barriere thermoscellant | |
ZA2017/00739A ZA201700739B (en) | 2014-07-30 | 2017-01-30 | Heat-sealing barrier paper |
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FR1457368 | 2014-07-30 | ||
FR1457368A FR3024467B1 (fr) | 2014-07-30 | 2014-07-30 | Papier barriere thermoscellant |
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WO2016016340A1 true WO2016016340A1 (fr) | 2016-02-04 |
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PCT/EP2015/067438 WO2016016340A1 (fr) | 2014-07-30 | 2015-07-29 | Papier barriere thermoscellant |
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US (1) | US20170211237A1 (fr) |
JP (2) | JP2017524081A (fr) |
CN (1) | CN107075810B (fr) |
AR (1) | AR101667A1 (fr) |
BR (1) | BR112017001817B1 (fr) |
CA (1) | CA2956766A1 (fr) |
FR (1) | FR3024467B1 (fr) |
WO (1) | WO2016016340A1 (fr) |
ZA (1) | ZA201700739B (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3024468B1 (fr) * | 2014-07-30 | 2019-05-17 | Munksjö Oyj | Procede de fabrication d'un papier barriere thermoscellant |
CN110312833B (zh) | 2017-02-27 | 2022-06-14 | 维实洛克Mwv有限责任公司 | 可热封的屏障纸板 |
PL427209A1 (pl) * | 2018-09-24 | 2020-04-06 | Silbo Spółka Z Ograniczoną Odpowiedzialnością | Materiał kompostowalny w szczególności przeznaczony na opakowanie i sposób wytwarzania materiału kompostowalnego |
JP7081042B2 (ja) | 2019-03-18 | 2022-06-06 | 日本製紙株式会社 | 紙製バリア材料 |
ES2924344T3 (es) | 2019-04-26 | 2022-10-06 | Neenah Gessner Gmbh | Papel de envolver termosellable |
DE102019118425A1 (de) * | 2019-07-08 | 2021-01-14 | Constantia Pirk Gmbh & Co. Kg | Multifunktionales Barrierepapier und Verfahren zu dessen Herstellung |
IT201900012999A1 (it) * | 2019-07-26 | 2021-01-26 | Francesco Toschi | Macchina e metodo per accoppiato impermeabile |
FI130515B (en) * | 2020-12-23 | 2023-10-19 | Ch Polymers Oy | Process for producing heat-sealable multi-layer board and heat-sealable multi-layer board that can be produced with the process |
CN113152147A (zh) * | 2021-04-22 | 2021-07-23 | 叶子包装(美国)有限公司 | 一种环保型吸管纸及其制备方法、纸吸管加工工艺 |
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2014
- 2014-07-30 FR FR1457368A patent/FR3024467B1/fr active Active
-
2015
- 2015-07-29 BR BR112017001817-9A patent/BR112017001817B1/pt active IP Right Grant
- 2015-07-29 CN CN201580053261.2A patent/CN107075810B/zh active Active
- 2015-07-29 WO PCT/EP2015/067438 patent/WO2016016340A1/fr active Application Filing
- 2015-07-29 AR ARP150102418A patent/AR101667A1/es unknown
- 2015-07-29 CA CA2956766A patent/CA2956766A1/fr not_active Abandoned
- 2015-07-29 US US15/500,334 patent/US20170211237A1/en not_active Abandoned
- 2015-07-29 JP JP2017526012A patent/JP2017524081A/ja active Pending
-
2017
- 2017-01-30 ZA ZA2017/00739A patent/ZA201700739B/en unknown
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2020
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Also Published As
Publication number | Publication date |
---|---|
JP2020073753A (ja) | 2020-05-14 |
US20170211237A1 (en) | 2017-07-27 |
CN107075810A (zh) | 2017-08-18 |
EP3186442B1 (fr) | 2021-05-26 |
FR3024467B1 (fr) | 2019-05-17 |
FR3024467A1 (fr) | 2016-02-05 |
ZA201700739B (en) | 2018-05-24 |
CN107075810B (zh) | 2019-08-27 |
BR112017001817B1 (pt) | 2022-02-01 |
CA2956766A1 (fr) | 2016-02-04 |
BR112017001817A2 (pt) | 2018-02-14 |
JP2017524081A (ja) | 2017-08-24 |
AR101667A1 (es) | 2017-01-04 |
EP3186442A1 (fr) | 2017-07-05 |
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