EP3497283B1 - Carton résistant à l'huile, aux graisses et à l'humidité - Google Patents

Carton résistant à l'huile, aux graisses et à l'humidité Download PDF

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Publication number
EP3497283B1
EP3497283B1 EP17751579.8A EP17751579A EP3497283B1 EP 3497283 B1 EP3497283 B1 EP 3497283B1 EP 17751579 A EP17751579 A EP 17751579A EP 3497283 B1 EP3497283 B1 EP 3497283B1
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Prior art keywords
paperboard
coating
binder
pigment
multilayer coating
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German (de)
English (en)
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EP3497283A1 (fr
Inventor
Steven Parker
Jiebin Pang
Natasha MELTON
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WestRock MWV LLC
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WestRock MWV LLC
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Priority claimed from US15/258,181 external-priority patent/US9863094B2/en
Priority claimed from US15/664,218 external-priority patent/US9920485B2/en
Application filed by WestRock MWV LLC filed Critical WestRock MWV LLC
Publication of EP3497283A1 publication Critical patent/EP3497283A1/fr
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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
    • 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
    • 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
    • D21H19/822—Paper comprising more than one coating superposed two superposed coatings, both being 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes

Definitions

  • This disclosure relates to paperboard substrates preferably having oil and grease resistance, yet with full recyclability and without having a tendency toward blocking, and furthermore being compostable.
  • Oil and grease resistance is one of the top needs for paperboard packages in food and food service industries.
  • Several technologies including specialty chemical (wax, fluorochemicals, starch, polyvinyl alcohol (PVOH), sodium alginate, etc.) treatment, polymer extrusion coating (polyethylene, etc.) have been employed to provide oil and grease resistance of paperboard packaging.
  • the paper or paperboard treated with wax or coated with polyethylene which is currently used in oil and grease resistant packaging, has difficulties in repulping and is not as easily recyclable as conventional paper or paperboard.
  • Paper or paperboard treated with specialty chemicals such as fluorochemicals has potential health, safety and environmental concerns, and scientists have called for a stop to non-essential use of fluorochemicals in common consumer products including packaging materials.
  • Aqueous coating is one of the promising solutions to achieve these goals.
  • blocking the tendency of layers in a roll of paperboard to stick to one another
  • blocking is also a major technical hurdle for on-machine application of aqueous barrier coatings.
  • most aqueous barrier coatings are not fully repulpable.
  • Commonly-assigned United States application 15/017,735 published as U.S. Published Patent Application No. 2016-0230343 A1 addresses these problems.
  • ASTM D6868-11 Standard Specification for compostability of paper or paperboard requires any non-biodegradable organic constituent to be ⁇ 1% of the dry weight of the finished product, and the total portion of organic constituents that are not biodegradable cannot exceed 5 % of the total weight.
  • Most conventional or commercially available aqueous barrier coatings use high to pure synthetic polymer binder level, which makes it extremely challenging to meet this ⁇ 1% non-biodegradable composition requirement for the ASTM compostability standard.
  • US 6548120 and US 2010/310776A disclose coated paper or paperboard products coated with a polymer which may optionally include starch.
  • US 5776619 discloses multi-coated paperboard in which the preferred binder is n-alkyl-acrylate-acrylonitrile-styrene copolymer.
  • WO9605054A discloses a compostable paperboard comprising a primer coat and a top coat.
  • the primer coat contains a polymer selected from acrylic polymer or copolymer, polyvinyl acetate, polyvinyl alcohol, poy-ethylene vinyl acetate, poly-ethylene vinyl chloride, styrene-butadiene copolymers, polyvinylidene chloride and starch.
  • the top coat contains a polymer selected from acrylic polymer or copolymer, styrene-butadiene copolymers and polyvinylidiene chloride and imparts water and grease resistance.
  • the coating preferably contains wax however. Furthermore most of the Examples omit pigment and there is no teaching regarding the pigment content.
  • coated paperboard comprising:
  • the invention provides a method of treating paperboard, the method comprising:
  • the 'barrier' side of a paperboard is coated with at least one layer of aqueous coating containing a renewable natural material (modified starch) and a specialty synthetic binder, resulting in the coated oil and grease resistant paperboard (i.e., 254 ⁇ m (10 pt caliper) and above) meeting the ⁇ 1% non-biodegradable composition requirement for the compostability standard.
  • the coating can be applied on a paper machine or by an off-line coater for example, and can optionally be applied in two coating steps (or two passes) for further enhanced barrier properties.
  • Paperboard coated according to the invention preferably provides resistance to oil and grease and preferably does not have any tendency to block, and typically can be produced at a low cost.
  • FIG.1 and FIG 2 illustrate an exemplary on-paper machine method for coating a paperboard web with one or more layers of aqueous coating.
  • a forming wire 110 in the form of an endless belt passes over a breast roll 115 that rotates proximate to a headbox 120.
  • the headbox provides a fiber slurry in water with a fairly low consistency (for example, about 0.5% solids) that passes onto the moving forming wire 110.
  • a first distance 230 water drains from the slurry and through the forming wire 110, forming a web 300 of wet fibers.
  • the slurry during distance 130 may yet have a wet appearance as there is free water on its surface. At some point as drainage continues the free water may disappear from the surface, and over distance 231, water may continue to drain although the surface appears free from water.
  • the web is carried by a transfer felt or press felt through one or more pressing devices such as press rolls 130 that help to further dewatering the web, usually with the application of pressure, vacuum, and sometimes heat.
  • the still relatively wet web 300 is dried, for example using dryer or drying sections 401, 402 to produce a dry web ("raw stock") 310 which may then be run through a size press 510 that applies a surface sizing to produce a sized "base stock” 320 which may then be run through additional dryer sections 403 and (on FIG. 2 ) smoothing steps such as calendar 520.
  • the base stock 320 may then be run through one or more coaters.
  • coater 530 may apply a first coat ("BC") to a first side ("C1") of the web, and the first coat may be dried in one or more dryer sections 404.
  • Coater 540 may apply a second coat ("TC") to the first side of the web, and the second coat may be dried in one or more dryer sections 405.
  • coater 550 may apply a first coat to the second side ("C2") of the web, and this coat may be dried in one or more dryer sections 406.
  • Coater 560 may apply a second coat to the second side of the web, and this coat may be dried in one or more dryer sections 407.
  • the order of coaters 540, 550 may be swapped, so that both sides C1 and C2 are first given a first coat, and then one side or both sides are given a second coat. In some instances, only one side will be coated as shown in FIG. 3 , or only a first coat may be applied. In some instances, a third coat or more may be applied to one side.
  • coating may be applied by an off-machine coater as shown in Fig. 4 .
  • the paperboard having been produced on the paper machine and wound onto reel 572 may then be transported (as a reel or as smaller rolls) to an off-machine coater 600, where the paperboard is unwound from reel 572, given a first coating by coater 610, dried in dryer(s) 601, given an optional second coating by coater 620, dried in dryer(s) 602, optionally given further treatment (such as gloss calendaring) and then wound onto reel 573.
  • An off-machine coater could instead apply a single coat to one side of the paperboard, or could apply a single coat to each side, or could apply more than one coat to either or both sides. Alternately some coating may be done on the paper machine, with additional coating done on an off-machine coater.
  • coaters illustrated in FIGs. 2 4 are devices where a coating is held in a pan, transferred by a roll to the lower surface of the web (which may be either the first side or the second side depending on the web path), and then the excess coating scraped off by a blade as the web wraps partially around a backing roll.
  • coater types including but not limited to curtain coater, air knife coater, rod coater, film coater, short-dwell coater, spray coater, and metering film size press.
  • the particular materials used in the coatings may be selected according to the desired properties of the finished paperboard.
  • one side e.g. C1 may be given coating(s) that provide desired printability, while the other side e.g. C2 may be given barrier coating(s) that provide oil and grease resistance (OGR).
  • the printability coating may be applied before the OGR coating, or, the OGR coating may be applied before the printability coating.
  • Typical aqueous barrier coatings often use specialty polymer(s), wax, and/or a higher polymer binder level (compared to conventional print coatings). These coatings can cause problems with repulpability of the coated paperboard because the coatings are usually difficult to breakdown to acceptable size or tend to form 'stickies' in paperboard making with the recycled fibers. Due to the high content of synthetic polymer binder in the coating, it is extremely challenging for each of the individual organic components in the coating to meet the ⁇ 1% non-biodegradable composition requirement of the ASTM D6868-11 compostability standard.
  • barrier coatings give paperboard a tendency to 'block' (the layers stick together) either in the reel 570, 571, 572, 573 or after it is rewound into rolls.
  • the reel 570 there may be residual heat from the dryers, which may dissipate quite slowly because of the large mass of the reel. Higher temperatures may increase the tendency toward blocking.
  • paperboard coated with conventional printability coatings usually does not block, and usually is fully repulpable. It would be advantageous if non-blocking and fully repulpable coatings also provided at least some degree of barrier properties.
  • conventional printability coatings do not provide satisfactory barrier properties.
  • Their formulations have relatively low levels of binder so as to absorb rather than repel fluid (printing ink, for example).
  • Binder amounts in conventional printability coatings can range from 15-25 parts per 100 parts of pigment by weight for base coatings, and 10-20 parts per 100 parts pigment by weight for top coatings. Printing grades would tend to be in the lower half of these ranges. Limiting the binder amount in the top coating may allow printing inks or adhesives to absorb readily into the printability coating. Simply increasing the binder to improve barrier properties eventually interferes with printability and causes additional problems, including blocking and repulpability problems.
  • inventive coatings disclosed in the present application meet the composition requirement for the ASTM compostability standard, and in preferred embodiments provide easy repulping, do not block at elevated temperature and pressure, and show good barrier properties, while using conventional pigments and synthetic and natural binders that are low-cost and readily available as coating materials for the paper or paperboard industry.
  • pigments may be used in the present invention and may include, but are not limited to, kaolin clay, calcium carbonate, etc. Pigments used in the examples herein are given the following 'shorthand' designations:
  • Synthetic polymer binders may include, but are not limited to, styrene acrylate copolymer (SA), polyvinyl acetate (PVAc), and styrene-butadiene copolymer (SB), etc.
  • Natural binders may include, but are not limited to, starch, alginate, protein, etc.
  • Pen-cote ® D Conventional styrene acrylate binder (SA, PHOPLEX ® C-340, available from Dow Chemical Company), acrylic polymer binder (Basonal ® X400AL, available from BASF Corporation), starch binder (Pen-cote ® D UHV, available from Ingredion Incorporated), or a blend of Pen-cote ® D with SA or Basonal ® , are used in examples described herein. Benefits of using Pen-cote ® D include its being directly dispersible into the formulation, increasing the coating formulation solids, and possibly being able to eliminate other thickeners. The choice of binder in the examples is not meant to be limiting in any way.
  • Coatings including control coatings were prepared according to the formulations shown in Table 1, which provides a list of major constituents in dry parts of the aqueous coating (C - Control, CF - Compostable Formulation) formulations used to achieve the oil and grease resistance, and to meet the composition requirement for the ASTM compostability standard, without blocking or repulpability problems.
  • Table 1 provides a list of major constituents in dry parts of the aqueous coating (C - Control, CF - Compostable Formulation) formulations used to achieve the oil and grease resistance, and to meet the composition requirement for the ASTM compostability standard, without blocking or repulpability problems.
  • Tables 3 and 4 The test results are shown in Tables 3 and 4.
  • substantially no fluorochemical was used in the coatings.
  • substantially no fluorochemical is meant that fluorochemicals were not deliberately utilized, and that any amount present would have been at most trace amounts. Although fluorochemicals can be excluded in lab experiments, trace amounts of such materials might be present in some paper machine systems due to making various grades of product, or might be introduced into a papermaking system through recycling processes. Likewise, substantially no wax was used in the coatings.
  • the total binder to pigment ratio (parts of binder, by weight, to 100 parts of pigment) of the formulations shown in Table 1 ranges from 30 to 35. This is more than the binder to pigment ratio for typical printability coatings (where rapid absorption of ink is desired) and less than the binder to pigment ratio of typical barrier coatings. Thus, it appears that an effective binder to pigment ratio may be from about 25 to about 40 parts binder per 100 parts pigment (by weight), or preferably from 30 to 35 parts binder per 100 parts pigment.
  • Blending starch such as Pen-cote@ D
  • the Pen-cote@ D starch was added at up to 5 parts in the final formulations.
  • Paperboard samples were made using solid bleached sulphate (SBS) substrate with a caliper of 457 ⁇ m (18 pt., 0.018").
  • SBS solid bleached sulphate
  • the samples were coated on one side (herein termed the "barrier side") using a pilot blade coater with a one-layer coating.
  • the pilot results are expected to be representative of results that might be achieved on a production paper machine or a production off-machine coater.
  • the oil and grease resistance (OGR) of the samples was measured on the 'barrier side' by the 3M kit test (TAPPI Standard T559 cm-02). With this test, ratings are from 1 (the least resistance to oil and grease) to 12 (excellent resistance to oil and grease penetration). The results here gave 3M kit levels between 1 to 6 (see Table 3). The higher values were obtained with the higher coat weights for each specific formulation.
  • Basonal ® binder itself (C2 formulation) performs better on 3M kit level than SA binder (C1 formulation) at comparable coat weights (see Table 3); furthermore, blending Pen-cote ® D starch with Basonal ® (CF1-3) maintains the performance on 3M kit level as using Basonal ® itself at comparable or slightly higher coat weight, while meeting the ⁇ 1% non-biodegradable composition requirement for the ASTM compostability standard. Especially, a 3M kit level of 4 5 (suitable for most food service packages) is achieved while meeting the compostability standard.
  • oil absorptiveness was used to quantify and compare the OGR performance (oil and grease resistance), which measures the mass of oil absorbed in a specific time, e.g., 30 minutes, by 1 square meter of coated paperboard. For each condition tested, the sample was cut to provide two pieces each 162mm ⁇ 152mm (6 inch ⁇ 6 inch) square. Each square sample was weighed just before the test.
  • Moisture resistance of the coatings was evaluated by WVTR (water vapor transmission rate at 38°C and 90% relative humidity; TAPPI Standard T464 OM-12) and water Cobb (TAPPI Standard T441 om-04). All the formulations (CF1-4, Table 3) containing Basonal ® and Pen cote ® D starch showed similar water Cobb and WVTR values compared to both control formulations (C1 or C2), while all of them met the ASTM compostability standard.
  • the blocking behaviour of the samples was tested by evaluating the adhesion between the barrier coated side and the other uncoated side.
  • a simplified illustration of the blocking test is shown in FIG. 5 .
  • the paperboard was cut into 51mm ⁇ 51mm (2" ⁇ 2") square samples.
  • Several duplicates were tested for each condition, with each duplicate evaluating the blocking between a pair of samples 752, 754. (For example, if four duplicates were test, four pairs - eight pieces - would be used.)
  • Each pair was positioned with the 'barrier-coated' side of one piece 752 contacting the uncoated side of the other piece 754.
  • the pairs were placed into a stack 750 with a spacer 756 between adjacent pairs, the spacer being foil, release paper, or even copy paper.
  • the entire sample stack was placed into the test device 700 illustrated in FIG. 5 .
  • the test device 700 includes a frame 710. An adjustment knob 712 is attached to a screw 714 which is threaded through the frame top 716. The lower end of screw 714 is attached to a plate 718 which bears upon a heavy coil spring 720. The lower end of the spring 720 bears upon a plate 722 whose lower surface 724 has an area of one square inch. A scale 726 enables the user to read the applied force (which is equal to the pressure applied to the stack of samples through the one-square-inch lower surface 724).
  • the stack 750 of samples is placed between lower surface 724 and the frame bottom 728.
  • the knob 712 is tightened until the scale 726 reads the desired force of 100 lbf (100 psi applied to the samples).
  • the entire device 700 including samples is then placed in an oven at 50°C for 24 hours.
  • the device 700 is then removed from the test environment and cooled to room temperature. The pressure is then released and the samples removed from the device.
  • Blocking damage is visible as fiber tear, which if present usually occurs with fibers pulling up from the non-barrier surface of samples 754. If the non-barrier surface was coated with a print coating, then blocking might also be evinced by damage to the print coating.
  • samples 752(0)/754(0) might be representative of a "0" blocking (no blocking).
  • the circular shape in the samples indicates an approximate area that was under pressure, for instance about one square inch of the overall sample.
  • Samples 752(3)/754(3) might be representative of a "3" blocking rating, with up to 25% fiber tear in the area that was under pressure, particularly in the uncoated surface of sample 754(3).
  • Samples 752(4)/754(4) might be representative of a "4" blocking rating with more than 25% fiber tear, particularly in the uncoated surface of sample 754(4).
  • the depictions in FIG. 5 are only meant to approximately suggest the percent damage to such test samples, rather than showing a realistic appearance of the samples.
  • Repulpability was tested using an AMC Maelstom repulper. 110 grams of coated paperboard, cut into 25mm ⁇ 25mm (1" ⁇ 1") squares, was added to the repulper containing 2895 grams of water (pH of 6.5 ⁇ 0.5, 50°C), soaked for 15 minutes, and then repulped for 30 minutes. 300 mL of the repulped slurry was then screened through a Vibrating Flat Screen (0.15mm (0.006”) slot size). Rejects (caught by the screen) and fiber accepts were collected, dried and weighed. The percentage of accepts was calculated based on the weights of accepts and rejects, with 100% being complete repulpability.
  • SBS paperboard coated with low density polyethylene (LDPE) at a coat weight of 11.4 - 17.9 g/m 2 (7-11 lbs per 3000ft 2 ) was tested and gave fiber accepts in a range of 91 to 97%. (A fiber accepts percentage close to 100% is desired). Paperboard coated with polyethylene not easily repulpable and recyclable.
  • LDPE low density polyethylene
  • paperboard C2 with coating using a Basonal ® X 400 AL binder met the definition of compostability at a coat weight of 13.0 g/m 2 (8 pounds), but not at a coat weight of 14.6 g/m 2 (9 pounds.)
  • the last four columns (paperboard CF1, CF2, CF3, CF4) are for coatings blending the Basonal ® binder with Pen-cote ® D, a modified starch made by Ingredion Incorporated. These paperboards all meet the compostability definition.
  • Gloss was measured on a Technidyne Model T 480A Glossmeter according to TAPPI standard T480.
  • GE Brightness was measured on a Technidyne Brightimeter Micro S-5 according to TAPPI standard T452.
  • CIE Whiteness was measured the Technidyne Brightimeter Micro S-5 according to TAPPI standard T562.
  • Basonal ® binder or a blend of Basonal ® binder with Pen-cote ® D starch showed similar or slightly higher gloss of the coating than using SA binder, but with slightly lower brightness and whiteness and slightly higher b-color value.
  • Barrier properties are the focus of the inventive coatings, however, if there is a need to adjust the color or shade, food contact compliant dyes can be used in the formulations.
  • the Basonal ® X 400 AL binder made by BASF Corporation contains about 30% natural polymer component.
  • a natural polymer component refers to one grown and found in nature, which for example, can be any protein or polysaccharide or their derivatives.
  • the idea of using the Basonal ® X 400 AL binder along with some additional natural polymer (such as starch) in the present invention was that the natural component in the Basonal ® binder would promote the compatibility of the additional starch with the Basonal ® binder. Compatibility of the different ingredients is important for a barrier coating.
  • Tables 3 and 4 thus show that the combined use of Pen-cote ® D specialized starch with Basonal ® binder provides improved barrier performance, especially, achieving a 3M kit level of 5+, while meeting the compostability standard, being fully repulpable, and not having blocking problems.
  • FIG. 6 shows 3M kit level vs. coat weight. The kit value generally increases (improves) as coat weight increases. None of the control samples (using SA binder) were compostable in the coat weight range of 9.8-19.5 g/m 2 (6-12 lbs / 3msf).
  • FIG. 7 shows oil Cobb vs. coat weight for the selected samples as in FIG. 6 .
  • the oil Cobb generally decreases (improves) as coat weight increases.
  • the compostability (or lack thereof) has already been described.
  • the test samples using (combined) Basonal ® and Pen-cote ® D gave oil Cobb tests equal or better (lower) than the test samples using styrene-acrylate binder.
  • the printable formulations that were tested are summarized in Table 5 for three base coatings and two top coatings described using a basis of 100 parts pigment.
  • Table 6 shows coat weights used in several pilot coater tests for the printable formulations on 458 ⁇ m (18 pt) paperboard. Paperboards with the printable test coatings shown in Table 6 all would be compostable according to the ASTM standard, provided the paperboard caliper is 305 ⁇ m (12 pts) or higher. This would be true with - or without - the compostable barrier coatings (described above) on the opposite side of the paperboard.
  • Table 6 also shows the roughness, optical properties, and printability results for the test coatings.
  • Optical properties including Gloss, Brightness, Whiteness, and L-a-b color were measured according to TAPPI standards described above.
  • Parker Print-Surf (PPS) roughness was measured according to TAPPI standard T555.
  • the coated samples were printed on a Harper Phantom QD TM Flexo Proofing System from Harper Corporation using a 2.5 bcm anilox roll with a blue flexo ink. The ink density was measured on an X-Rite 500 series equipment. All test coatings, which would be compostable showed higher gloss, slightly higher brightness, and comparable whiteness over the commercial control.
  • the compostability standard involves calculations of how much of each non-biodegradable organic constituent is used in the product. It is hypothesized that by adjusting the coating, or the paperboard basis weight, compostability according to the ASTM standard might be achieved with somewhat lower calipers, such as 254 ⁇ m (10 pt. (0.010")). It is also hypothesized that by selecting multiple different binders, with or without biodegradable polymer binders, compostability according to the ASTM standard can be achieved for paperboard with printable coatings on both sides, where the paperboard has a caliper of 254 ⁇ m (10 pt) and higher.
  • Formulations for Printable Coatings Designation BC1 BC2 BC3 TC1 TC2 Clay-1 51 30 Clay-2 50 CaCO 3 -1 50 100 100 CaCO 3 -2 49 70 PHOPLEX ® C-340 (SA) 19 17 17 4 5 POLYCO TM 2160 (PVAc) 6 4 12 11 Pen-cote ® D UHV (starch) 4 TABLE 6.

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Claims (14)

  1. Carton couché comprenant :
    un support en carton ayant une première face et une seconde face ;
    un couchage multicouche comportant deux ou plus de deux couches en contact avec la première face du support en carton, le couchage multicouche comprenant un couchage de fond en contact avec le support en carton, le couchage de fond ayant un poids de couche de 9,76 g/m2 à 16,26 g/m2 (6 à 10 livres pour 3 000 pieds2) et comprenant liant et pigment, et un couchage de finition formant la couche la plus externe du couchage multicouche, le couchage de finition ayant un poids de couche de 4,88 g/m2 à 16,26 g/m2 (3 à 10 livres pour 3 000 pieds2) et comprenant liant et pigment, le couchage multicouche ne contenant pratiquement pas de composé chimique fluoré ni de cire ;
    dans lequel le pigment comprend au moins un(e) parmi une argile et le carbonate de calcium ;
    dans lequel le liant comprend un ou plusieurs liant(s) polymère(s) synthétique(s) et un ou plusieurs liant(s) biodégradable(s) naturel(s) supplémentaire(s) et le liant biodégradable supplémentaire représentant entre 1 et 10 parties pour 100 parties de pigment, en poids ;
    dans lequel le rapport liant à pigment dans le couchage multicouche vaut d'environ 25 à environ 40 parties de liant pour 100 parties de pigment, en poids ;
    dans lequel le carton couché a une épaisseur d'au moins 254 µm (0,010 pouce) ; et
    dans lequel le carton couché est compostable conformément à la norme de compostabilité ASTM D6868-11.
  2. Carton couché selon la revendication 1, dans lequel le couchage de finition a un poids de couche de 6,51 g/m2 à 11,39 g/m2 (4 à 7 livres pour 3 000 pieds2).
  3. Carton couché selon la revendication 1 ou 2, dans lequel le poids de couche total du couchage multicouche vaut de 8,14 g/m2 à 19,53 g/m2 (5 à 12 livres pour 3 000 pieds2).
  4. Carton couché selon l'une quelconque des revendications 1 à 3, dans lequel le couchage multicouche est en outre appliqué en contact avec la seconde face du support en carton.
  5. Carton couché selon l'une quelconque des revendications 1 à 4, dans lequel le couchage multicouche comporte deux couches, et dans lequel le couchage de finition est formé en contact avec le couchage de fond.
  6. Carton couché selon l'une quelconque des revendications 1 à 5, dans lequel le couchage multicouche est un couchage apte à recevoir une impression.
  7. Carton couché selon l'une quelconque des revendications précédentes, dans lequel le couchage multicouche est un couchage résistant aux huiles et aux graisses (RHG).
  8. Carton couché selon l'une quelconque des revendications précédentes, dans lequel les liants biodégradables supplémentaires incluent au moins un(e) parmi un polysaccharide, une protéine, et leurs dérivés.
  9. Carton couché selon l'une quelconque des revendications précédentes, dans lequel le liant biodégradable supplémentaire comprend l'amidon.
  10. Carton couché selon l'une quelconque des revendications précédentes, dans lequel le carton couché est apte à être remis en pâte jusqu'au degré où après remise en pâte le pourcentage de pâte acceptée est d'au moins 99 %.
  11. Carton couché selon l'une quelconque des revendications précédentes, n'ayant pas de tendance à l'adhérence en surface après avoir été maintenu pendant 24 heures à 50 °C sous une pression de 689 kPa (100 psi).
  12. Procédé de traitement de carton, le procédé comprenant les étapes consistant à :
    fournir un support en carton ayant une première face et une seconde face ;
    appliquer sur la première face un couchage multicouche comportant deux ou plus de deux couches, en appliquant un couchage de fond en contact avec le support en carton, le couchage de fond ayant un poids de couche de 9,76 g/m2 à 16,26 g/m2 (6 à 10 livres pour 3 000 pieds2) et comprenant liant et pigment, et appliquer un couchage de finition formant la couche la plus externe du couchage multicouche, le couchage de finition ayant un poids de couche de 4,88 g/m2 à 16,26 g/m2 (3 à 10 livres pour 3 000 pieds2) et comprenant liant et pigment, le couchage multicouche ne contenant pratiquement pas de composé chimique fluoré ni de cire ;
    dans lequel le carton couché a une épaisseur d'au moins 254 µm (0,010 pouce) ;
    dans lequel le pigment comprend au moins un(e) parmi une argile et le carbonate de calcium ;
    dans lequel le liant comprend un ou plusieurs liant(s) polymère(s) synthétique(s) et un ou plusieurs liant(s) biodégradable(s) naturel(s) supplémentaire(s) et le liant biodégradable supplémentaire représentant entre 1 et 10 parties pour 100 parties de pigment, en poids ;
    dans lequel le rapport liant à pigment dans le couchage multicouche vaut d'environ 25 à environ 40 parties de liant pour 100 parties de pigment, en poids ; et
    dans lequel le carton couché est compostable conformément à la norme de compostabilité ASTM D6868-11.
  13. Procédé selon la revendication 12, dans lequel le couchage multicouche est tel que défini dans l'une quelconque des revendications 2 à 6 et 8.
  14. Procédé selon la revendication 12 ou la revendication 13, dans lequel le carton couché est apte à être remis en pâte jusqu'au degré où après remise en pâte le pourcentage de pâte acceptée est d'au moins 99 %.
EP17751579.8A 2016-08-09 2017-08-04 Carton résistant à l'huile, aux graisses et à l'humidité Active EP3497283B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662372403P 2016-08-09 2016-08-09
US15/258,181 US9863094B2 (en) 2015-02-11 2016-09-07 Printable compostable paperboard
US15/664,218 US9920485B2 (en) 2015-02-11 2017-07-31 Printable compostable paperboard
PCT/US2017/045414 WO2018031388A1 (fr) 2016-08-09 2017-08-04 Carton résistant à l'huile, aux graisses et à l'humidité

Publications (2)

Publication Number Publication Date
EP3497283A1 EP3497283A1 (fr) 2019-06-19
EP3497283B1 true EP3497283B1 (fr) 2022-08-03

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CN (1) CN109844221A (fr)
BR (1) BR112019002675B1 (fr)
WO (1) WO2018031388A1 (fr)

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CN115996836A (zh) 2020-07-30 2023-04-21 宝洁公司 可回收的纸阻隔层合体
CN116075427A (zh) * 2020-10-09 2023-05-05 宝洁公司 生产可生物降解且可回收的阻隔纸层合体的方法
WO2022077008A1 (fr) * 2020-10-09 2022-04-14 The Procter & Gamble Company Stratifié de papier barrière biodégradable et recyclable
SE2250129A1 (en) * 2022-02-10 2023-08-11 Ali Mohammadi A method and a system for manufacturing a paperboard
WO2023153989A1 (fr) * 2022-02-10 2023-08-17 Mohammadi Mohammadhassan Procédé et système de fabrication d'un carton
EP4339361A1 (fr) 2022-09-13 2024-03-20 Wihuri Packaging OY Matériau d'emballage pour emballage en matière grasse et son procédé de fabrication
EP4339360A1 (fr) 2022-09-13 2024-03-20 Wihuri Packaging OY Matériau d'emballage pour emballage en matière grasse et son procédé de fabrication

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BR112019002675B1 (pt) 2023-04-11
CN109844221A (zh) 2019-06-04
EP3497283A1 (fr) 2019-06-19
BR112019002675A2 (pt) 2019-05-14
WO2018031388A1 (fr) 2018-02-15

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