WO2014175891A1 - Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée - Google Patents

Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée Download PDF

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Publication number
WO2014175891A1
WO2014175891A1 PCT/US2013/038331 US2013038331W WO2014175891A1 WO 2014175891 A1 WO2014175891 A1 WO 2014175891A1 US 2013038331 W US2013038331 W US 2013038331W WO 2014175891 A1 WO2014175891 A1 WO 2014175891A1
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WIPO (PCT)
Prior art keywords
rigid
package
force
thermoplastic film
food item
Prior art date
Application number
PCT/US2013/038331
Other languages
English (en)
Inventor
Jordan R. TRACY
Seamus A. WEDGE
Original Assignee
Curwood, Inc.
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
Application filed by Curwood, Inc. filed Critical Curwood, Inc.
Priority to EP13882811.6A priority Critical patent/EP2989022A4/fr
Priority to BR112015026762A priority patent/BR112015026762A2/pt
Priority to PCT/US2013/038331 priority patent/WO2014175891A1/fr
Publication of WO2014175891A1 publication Critical patent/WO2014175891A1/fr

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Classifications

    • 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
    • B65D85/00—Containers, packaging elements or packages, specially adapted for particular articles or materials
    • B65D85/70—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for
    • B65D85/72—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials
    • B65D85/76—Containers, packaging elements or packages, specially adapted for particular articles or materials for materials not otherwise provided for for edible or potable liquids, semiliquids, or plastic or pasty materials for cheese
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by associating or interconnecting two or more sheets or blanks
    • B65D75/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D75/32—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents
    • B65D75/36—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed
    • B65D75/366—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding one or both sheets or blanks being recessed to accommodate contents one sheet or blank being recessed and the other formed of relatively stiff flat sheet material, e.g. blister packages, the recess or recesses being preformed and forming one compartment
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • 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
    • B65D2575/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D2575/28—Articles or materials wholly enclosed in composite wrappers, i.e. wrappers formed by association or interconnecting two or more sheets or blanks
    • B65D2575/30—Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding
    • B65D2575/36—One sheet or blank being recessed and the other formed or relatively stiff flat sheet material, e.g. blister packages
    • B65D2575/361—Details
    • B65D2575/368—Details with reclosing means

Definitions

  • the present invention relates to peelable reseaiabSe packages for unportioned or uncut food products such as a chunk of cheese and more particularly, peelable reseaiabSe packages for use for unportioned or uncut food products having an integrated cutting and serving platform.
  • a common method of packaging foods is by use of horizontal form, fill, and seal (HFFS) procedures. These procedures involve shaping a portion of film ("form"), placing the food article inside or upon the formed film portion ("fill” ⁇ , completing the closure of the film portion around the food article and "sealing" open edges to complete the packaging process, Unportioned or uncut food products such as chunk cheese, butter, sausages, fruits and vegetables can be packaged by HFFS packaging methods. With conventional HFFS packaging methods, unportioned or uncut food products are frequently packaged in flexible pouches.
  • HFFS horizontal form, fill, and seal
  • the present invention is concerned with peeiabie reseaiable food packages fo packaging an unportioned, uncut or whole food item having an integrally formed food cutting and serving platform.
  • the integrally formed food cutting and serving platform comprises a substantially planar rigid laminate having a cut resistant surface.
  • the substantially pianar rigid laminate comprises a rigid layer having a stiffness value of at least about 1.70 kilogram-force and a first thermoplastic film.
  • the packages of the present also include a second thermoplastic member having a thermoformed cavity which encloses the food item and has a shape which generally conforms to the shape of the food item.
  • the packages further comprise a planar marginal flange extending around the thermoformed cavity, and a continuous peeiabie reseaiable hermetic seal circumscribing the food item formed by heat sealing the first thermoplastic fi!m to the second thermoplastic film.
  • FIG, 1 depicts an isometric view of one embodiment of the present invention in the dosed state.
  • [083 F!G. 2 depicts an isometric view of one embodiment of the present invention of the package of FIG. 1 in the partially opened state.
  • [07] 3 depicts an isometric view of another embodiment of the present invention in the opened state
  • FIG. 4 depicts a cross-sectional embodiment of a rigid member of the present invention
  • package 10 for packaging an unportioned or uncut food item 20 is depicted having an integrally formed food cutting and serving platform 30 comprising a substantially rigid planar laminate 50.
  • Rigid planar laminate 50 is formed from a rigid layer 100 and a first thermoplastic film 101 (see FIG. 4).
  • rigid layer 100 has a cut resistant surface and a stiffness va!ue of at least about 1.70 ki!ogram-force.
  • Package 10 comprises a second thermoplastic film 102 having a thermoformed cavity 40 which encioses food item 20 and has a shape which generally conforms to the shape of the food item 20.
  • FIG. 2 illustrates a preferred embodiment of package 10 having a flexible first thermoplastic film 101 in the partially opened state with an opened continuous peelable resealabie hermetic seal 7Sb depicted with diagonal lines.
  • FIG. 3 shows a preferred embodiment of package 10 having a rigid or semi-rigid first thermoplastic film 01 in the partially opened state with an opened continuous peelable resealabie hermetic sea! 7Sb depicted with diagonal lines.
  • t food item 20 is packaged so that it rests on and is supported by platform 30.
  • Package 1 is readily opened by a consumer by peeling second thermoplastic film 102 away from planar flange 90. After opening, a desired serving portion food item 20 may be cut or sliced with a knife or other cutting utensil directly on platform 30 without removing the entire food item from the package. Since platform 30 is designed to be dimensionai!y stable, the desired serving portion may then be served conveniently and directly from the package.
  • Second thermoplastic film 102 can be re-sealed to planar flange 90 to preserve the remaining portion of food item 20, Thus, platform 30 functions as a cutting surface and food handling/serving surface.
  • first thermoplastic film 101 shown in FIG. 4
  • second thermoplastic film 102 of package 10 is peelable and resealabie as shown in FIGS. 1 -3.
  • first thermoplastic film 101 is separated from second thermoplastic film 102
  • an interface of pressure sensitive adhesive is created because of cohesive failure of the pressure sensitive adhesive layer of first thermoplastic film 101.
  • the pressure sensitive adhesive layer of first thermoplastic film 101 is designed to cohesively fail relative to other film layers, package 10 provides a relatively low initial (or first) peel strength of no greater than 2.50 kilogram/inch (0.98 kilogram/centimeter).
  • package 10 is afforded consistent reseal (or second peel) strengths of at least 0.700 kilogram/inch (0.28 kilogram/centimeter) even after five consecutive separations and reseaiing operations.
  • rigid layer 100 has a stiffness value of at least about 1 .70 kilogram-force (3.75 pound-force), at least about 2.00 kilogram-force (4.41 pound-force), at ieasf about 3.00 kilogram-force (6.61 pound-force), at least about 4.00 kilogram-force (8.82 pound-force), at least about 5.00 kilogram- force ( 1 ,02 pound-force), at least about 6,00 kilogram-force (13.23 pound- force), at least about 7.00 kilogram-force (15.43 pound-force), at least about 8.00 kilogram-force (17.64 pound-force), or at least about 9.00 kilogram-force (19.84 pound-force).
  • cut resistance refers to a material having a slow rate penetration resistance of at least 85.77 kilogram- force (145 pounds-force).
  • rigid layer 100 has a slow rate penetration resistance of at least about 85.77 kilogram-force (145 pounds- force), at least about 70.31 kilogram-force (155 pounds-force), at least about 74,84 kilogram-force (165 pounds-force), at least about 183,91 kilogram-force (85 pounds-force) or at least about 90.72 kilogram-force (200 pounds-force).
  • the substantially planar rigid laminate 50 comprises a rigid layer 100 of aromatic polyesters, aliphatic polyesters, styrenic polymers, poly propylenes, high density polyethylenes, polypropylene, poSyamide, polycarbonate, paperboard, and combinations thereof, and a first thermoplastic film 101 as shown in FIG. 4,
  • first thermoplastic film 101 is a peeiable and reseaiabie film.
  • first thermoplastic film 101 is a peeiable and resealabie coexiruded blown film comprising moisture and oxygen barrier properties.
  • Rigid planar laminate SO may be readily formed in a manner well-known in the industry such as extrusion coating rigid layer 100 onto first thermoplastic film 101 by use of an appropriate laminating adhesive.
  • thermoplastic film 101 may include any number of film layers and film layer compositions depending upon bot functional and aesthetic requirements of the package. As shown in FIG. 4, this particular example of thermoplastic film 101 includes seven film layers. The composition of the layers is described in more detail herein below.
  • Rigid layer 100 may include a material selected from the group consisting of aromatic polyesters, aliphatic polyesters, styrenic polymers, polypropylenes, high density poSyethySenes, polyamides, polycarbonates, paperboard and blends of such.
  • the term "planar” refers to the overall dimensions of the rigid planar member having a generally flat surface.
  • rigid layer 100 has a thickness typically at least about 5.0 mil (about 127 micron), more typically at least about 6.5 mil (about 185.1 micron) and most typically at ieast about TO mil (about 254 micron).
  • Polyesters suitable fo use as a rigid layer 00 may include a homopolymer or copolymer of a!kyi-aromatic esters including but not limited to polyethylene terephthalate (PET), amorphous polyethylene terephihalate (APET), crystalline polyethylene terephthalate (CPET), glycol-modified polyethylene terephthalate ⁇ PETG ⁇ and po!ybutylene terephthalate; a copolymer of terephthalate and isophthaiaie including but not limited to polyethylene terephthalate/isophthaSate copolymer.
  • PET polyethylene terephthalate
  • APET amorphous polyethylene terephihalate
  • CPET crystalline polyethylene terephthalate
  • glycol-modified polyethylene terephthalate ⁇ PETG ⁇ and po!ybutylene terephthalate a copolymer of terephthalate and isophthaiaie including but not limited
  • Aliphatic polyester may also be used which include, but are not limited to poiyiactic acid (PLA); poiyh droxyaikonates including but not limited to polyhydroxypropionate, poly(3 ⁇ hydroxybutyrate) (PH3B), poiy ⁇ 3 ⁇ hydroxyvaleraie) (PH3V), poly(4- hydroxybutyrate) (PH4B), poiy(4-hydroxyvaieraie) (PH4V), poly(5- hydroxyvalerate) (PH5V), poiy(6-hydroxydodecanoate) (PH6D); and blends of any of these materials.
  • PPA poiyiactic acid
  • PHA poiyiactic acid
  • aromatic polyesters include but are not limited to polyethylene terephthalate (PET), oriented polyethylene terephthalate (OPET), amorphous polyethylene terephthalate (APET) and glycol-modified polyethylene terephthalate (PETG).
  • PET polyethylene terephthalate
  • OPET oriented polyethylene terephthalate
  • APET amorphous polyethylene terephthalate
  • PETG glycol-modified polyethylene terephthalate
  • PET EastmanTM PET 9921 , which is available from Eastman Chemical Company (Kingsport, Tennessee).
  • PETG EastarTM Copolyester 6762, which Is also available from Eastman Chemical Company (Kingsport Tennessee)
  • An example of an aliphatic polyester includes but is not limited to poiyiactic acid (PLA).
  • styrenie materials which may be used for a rigid layer 100 include, but are not limited to t high impact polystyrene (HIPS), general purpose polystyrene (GPPS), styrene block copolymer (SBC) (including but not limited to styrene butadiene copolymer (SB).
  • HIPS high impact polystyrene
  • GPPS general purpose polystyrene
  • SBC styrene block copolymer
  • SB styrene butadiene copolymer
  • HIPS examples include but are not limited to Impact Polystyrene 825E and impact Polystyrene 945E, bot of which are available from Totai Petrochemicals USA, Snc; EB602S Rubber Modified High Impact Polystyrene, which is available from Chevron Phillips Company (The Woodlands, Texas); and 6210 High Impact Polystyrene, which is available from !neos Nova LLC (Channahon, iiiinois), GPPS is often called crystal polystyrene, as a reference to the ciarity of the resin.
  • GPPS examples include but are not limited to Crystal Polystyrene 524B and Crystal Polystyrene 5258, both of which are available from Total Petrochemicals USA, Inc.
  • Styrene block copolymers include styrene butadiene copolymers (SB).
  • SBC Styrene block copolymers
  • SB styrene butadiene copolymers
  • the styrene-butadiene copolymers that are suitable for packaging applications are those resinous block copolymers that typically contain a greater proportion of styrene than butadiene and that are predominantly polymodai with respect to molecular weight distribution.
  • SB DK13 K- Resin® Styrene-Butadiene Copolymer, which is available from Chevron Phillips Chemical Company (The Woodlands, Texas).
  • suitable poiypropyienes for use as a rigid layer 100 may include but are not limited to those polypropylene homopolymers traditionally used to cast sheets.
  • suitable poiypropyienes include Polypropylene 3287WZ, which is available from Total Petrochemicals USA, Inc. (Houston, Texas); and H02C-00 Polypropylene Homopoiymer, which is availabie from Ineos Olefins & Polymers USA (League City, Texas).
  • high density polyethylene or ⁇ refers high molecular weight polyethylenes which may be homopolymers or copolymers of ethylene which have densities of at least 0.980 gram/centimeter 3 , at least 0.970 gram/centimeter 3 , at least 0.980 gram/centimeter, or at least 0.990 gram/centimeter 3 .
  • polyamide or "PA” or “nylon” refers to a homopoiymer or copolymer having an amide linkage between monomer units which may be formed by any method known to those skilled in the art.
  • the amide linkage can be represented by the general formula: [C(O)- R-CiOJ-NH-R'-NHjr, where R and R' are the same or different alky) (or aryi) group.
  • nyion polymers for use as a rigid member may include but are not limited to nylon 6 (polycapro!aetam), nylon 11 (po!yundecanolactam), nylon 12 (po!yauryi!actam), nylon 4,2 (polytetramethy!ene ethyfenediamide), nylon 4,6 (poiytetramethy!ene adipamide), nylon 6,6 (po!yhexamethylene adipamide), nylon 6,9 (poiyhexamethyiene azeiamide), nyion 6,10 (polyhexamethylene sebacamide), nylon 6,12 ⁇ polyhexamethylene dodecanediamide), nylon 7,7 (polyheptamethyiene pimeiamide), nylon 8,8 (poiyoctamethylene suberamide), nylon 9,9 (po!ynonamethyiene azeiaiaroide), nylon 10,9 (po!ydecam
  • nylon copolymers inciude are not limited to nylon 6,6/6 copolymer (poiyhexamethyiene adipamide/caproiaciam copolymer), nylon 6,6/9 copolymer (poiyhexamethyiene adipamide/azelaiamide copolymer), nylon 6/6,6 copolymer ⁇ poSycaprolactam/hexamethylene adipamide copolymer), nylon 6,2/6,2 copolymer (poiyhexamethyiene ethyienediamide/hexamethyiene ethylenediamide copolymer), and nylon 6,6/6,9/6 copolymer (poiyhexamethyiene adipamide/hexamethy!ene azelaiamide caprolaciam copolymer).
  • aromatic nyion polymers inciude but are not limited to nylon 4,1, nylon 6,1, nylon 6,6/61 copolymer, nylon 6,6/61 copolymer, nylon MXD6 (poSy-m-xyiyiene adipamide), poly-p-xyiylene adipamide, ny!on 6I/6T copolymer, nylon 61/61 copolymer, nylon XDI, nyion 6/MXDT/l copolymer, nylon 6T (poiyhexamethyiene terephthaiamide), nyion 12T (poiydodecamethyiene terephthaiamide), nyion 66T, and nyion 6-3-T (poiy(trimethyi hexamethylene terephthaiamide ⁇ ).
  • paperboard refers to heavy papers Sike board stock, paperboard and corrugated paperboard materials. Board stock is a subgroup of paperboard used to make paper cups and plates, hot and coid food containers, ice cream containers, paperback book covers and the like. Paperboard may include both coated and uncoated paperboard. Boxboard, a second subgroup of paperboard, is used to make folding cartons such as cereai boxes, beverage carriers, and tissue boxes.
  • 100 should exhibit sufficient stiffness.
  • Different materials and thicknesses were evaluated as possible backing layer candidates with respect to their stiffness as a function of ioop stiffness measurement.
  • an instron tensile tester from Instron Corporation, Norwood, Massachusetts was used having a 100-pound (approximately 45.36 kilogram) load ceil Specimen samples were prepared by cutting a 4 inch b 4 inch sample of each materia! and folding opposing ends of the sample towards themselves to form a loop. The folded sample was placed into a specimen holding fixture so that the opposing sides of the sample were separated by a distance of 1 .0 inch (2,54 centimeter).
  • APET a food grade amorphous polyethylene terephthaiate copolymer having a density of 0.90 gram/centimeter 3 and intrinsic viscosity of 0.80 deciliter/gram which is commercially available and sold under the trademark PERFORMANCETM PET 1 08 by StarPet inc., Asheboro, North Carolina.
  • HSPS a rubber modified high impact polystyrene having a specific gravity of 1.03 gram/centimeier 3 and melt flow rate of 3.2 gram/ 0 min which is commercially available and sold as EB6755 by Chevron Phillips Chemical Company, LP, The Woodlands, Texas.
  • rigid layer 100 is cut resistant Different materials and thicknesses were evaluated as possible backing layer candidates with respect to their cut resistance as a function of slow rate penetration resistance measurement.
  • Slow Rate Penetration Resistance herein refers to the test which permits flexible thermoplastic webs to be characterized by slow rate penetration resistance to a driven probe. The test is performed at room temperature, by applying a biaxial stress at a single test velocity on the material until perforation occurs. The force to perforation is determined and reported in units of kilograms-force.
  • a person having ordinary skill in the art would recognize that slow rate penetration resistance may be determined using ASTSvl test method F1306-90.
  • Samples were prepared by cutting a 1 inch (2.54 centimeter) wide by 5 inch (12/7 centimeter) long specimen of each material.
  • AST test method F13GS- 90 was modified by replacing the specimen clamping fixture with a flat surface of soft pliable material such as 0,25 to 0,50 inch (0.635 to 1.27 centimeter) silicone pad atop a fiat steel plate.
  • the probe was also modified to one having a relatively sharp knife edge.
  • the cut resistance as a function of slow rate penetration resistance (or "SRPR") was measured as the force required to cut through each specimen.
  • the average of fen measurements for each materials and thickness are shown in TABLE 2 below:
  • first thermoplastic film 101 and the second thermoplastic film 102 can be a coextruded blown film.
  • first thermopiastic film 101 is adapted to be peeiabie and resealabie.
  • peeiabie may refer to a single film layer which is adapted to cohesively separate by application of pulling or peeling force exerted away from the film.
  • peeiabie may also refer to two film layers which are adapted to adhesively separate by application of pulling or peeling force exerted away from the film.
  • the force required to separate or fracture a single fiim Iayer or to separate two film layers may be dependent upon the chemicai composition of each film layer and any adjacent film layers. This force may be further dependent upon both the chemicai composition of each film layer and any adjacent film layers and the relative thicknesses of each film Iayer, Separation of a single layer is commonly referred to in the art as cohesive failure or cohesive deiamination. Sn contrast, separation of two adjoining film layers is commonly referred to in the art as adhesive failure or adhesive delamination.
  • the first thermoplastic films according to the present invention may be considered "resealabie" when the interface formed upon separation inciudes a pressure sensitive adhesive which is adapted to reseal or re-adhere to itself.
  • the force required to "reseal" the interface is proportional to the manual pressure exerted on the film.
  • the peeiabie resealabie interface is adapted to remain secure and unbroken during package fabrication, distribution and storage, and yet may be easily and repeatedly separated and rejoined or re-tacked together.
  • the peeiabie resealabie interface of the first thermoplastic film according to the present invention may include an initial peel strength which relates to initial force required to first separate the fiim from itself, and a re-tack peel strength which relates to force require to separate the film from itself after it has been separated and re-sealed
  • Peeiabie resealabie films are known in the art and may include those described in U.S. Patent os. 7,422,782; 7,927,679; 8,283,010; 8,283,011 ; and 8,329,276, all of which are incorporated herein by reference.
  • first thermoplastic film 101 for use in the present invention formed by blown film coextrusion methods.
  • first thermoplastic film 101 is a peeiabie and reseaiabie film having cohesive failure properties as well as oxygen and moisture barrier properties.
  • the film structure and layer composition are presented below.
  • A!l amounts presented in TABLE 3 are approximate weight percentages based on the total weight of the particular layer.
  • LLDPE Linear low density polyethylene; A commercially available example of LLDPE is Nova SCLAIR ® FP619-A supplied by Nova Chemicals Corporation, Calgary, Alberta, Canada. od-PEi -Anhydride modified linear low density polyethylene; A commercially available example of mod-PE, is Westiake TymaxTM supplied by VVest!ake Chemical Corporation, Houston, Texas.
  • PSA ⁇ Pressure sensitive adhesive A commercially available example of PSA is Bostik MX615 supplied by Bostik, In Wauwatosa, Wisconsin, PB ⁇ PoSybutene; A commerciaiiy available example of PB is Basel! Polybutene-1 PB 8640 supplied by Basel! Service Company B.V., Rotterdam, Netherlands.
  • EVOH Ethy1ene vinyl alcohol copolymer
  • a commerciaiiy available example of EVOH is SOARNOL ® ET3803 supplied b Nippon Synthetic Chemical Industry Company, Ltd. (Nippon Gohsei), Osaka, Japan.
  • ULDPE Ultra low density polyethylene
  • a commercially available example of ULDPE is Dow ATTANE® NG 4701 G supplied by Dow Chemical Company, Midland, Michigan.
  • LLDPE 2 Unear low density polyethylene; A commercially available example of LLDPEs is Nova Chemical Novapo PF-01 18-F supplied by Nova Chemicals Corporation, Calgary, Alberta, Canada.
  • TABLE 4 and TABLE 5 illustrate a certain particular embodiments of a flexible coextruded second thermoplastic film 102 for use in the present invention each having a totai thickness of about 6.0 mil (about 152,4 micron) and formed by blown film coextrusion methods.
  • TABLE 6 there is illustrated a particular example of a rigid or semi-rigid flexible second thermoplastic film 102 for use in the present invention.
  • the film of TABLE 6 was prepared by first forming a 13.75 mii ⁇ 349.3 micron) coextruded blown film of layers 1 through 7 and then, extrusion coating onto to this structure a 12.0 mil (305 micron) layer of amorphous polyethylene terephthaiate. These examples exhibited both oxygen and moisture barrier properties.
  • the film structure and layer composition are presented below. All amounts presented in TABLE 4 , TABLE 5 and TABLE 6 are approximate weight percentages based on the total weight of the particular layer.
  • PA,-83.9 PA2-15.0 Additives- 1 , 1 (2 nd outer layer)
  • PA( ⁇ nyion 8; A commercially availabie example of PAi is Uliramid polyamide supplied by BASF Chemical Company, Freeport, Texas.
  • ⁇ 2 3 ⁇ 4 ⁇ amorphous nylon 8I/8T copo!ymer;
  • a commercially availabie example of PA2 is DuPont Selar® PA 3426 supplied by E. L du Pont de Nemours and Company, Wilmington, Delaware.
  • EVA-eihylene vinyl acetate copolymer A commercialiy available exampte of EVA is Petrothene ® NA442-051 supplied by Lyondeil Chemical Company, Houston, Texas.
  • PVDC Adhesive polyvinyl idene dichforide emulsion adhesive
  • SERFENETM 2010 supplied by the Dow Chemical Company, Midland, Michigan.
  • the first and second thermoplastic films according to the present invention may each provide an oxygen transmission rate of less than about 1.0 centimeter 3 /! 00 tnch 2 /24 hours at 73° F, 0% Relative Humidity and 1 atmosphere ⁇ or about 15.5 centimeterVmeter 2 /24 hour at 23° C, 0% Relative Humidity and 1 atmosphere), preferably, less than about 0.5 centmeter 3 /100 inch 2 /24 hour at 73° F, 0% Relative Humidity and 1 atmosphere ⁇ or about 7,75 centimeterVmeter 2 ⁇ hour at 23° C, 0% Relative Humidity and 1 atmosphere), and most preferably, about 0,2 cenfimeterVlOO inch /24 hour at
  • the first and second thermoplastic films, 101 and 102 according to the present invention may each provide a water vapor transmission rate less than about 1.0 gram/100 inchA/24 hour at 73 s F, 90% Relative Humidit and 1 atmosphere ⁇ or about 15.5 gram/meter 2 /24 hour at 23 c C, 90% Relative Humidity and 1 atmosphere ⁇ and preferably, about 0,2 gram/100 inch 2 /24 hour at 73° F, 90% Relative Humidity and 1 atmosphere (or about 3.1 gram/meter 2 /24 hou at 23° C, 90% Relative Humidity and 1 atmosphere).
  • the polymer resins utilized in the present invention are generally commercially available in pellet form and, as generally recognized in the art, may be melt blended or mechanically mixed by well- known methods using commercially available equipment including tumblers, mixers or blenders.
  • well-known additives such as processing aids, slip agents, anti-blocking agents and pigments, and mixtures thereof may be incorporated into the polymer layers, by blending prior to extrusion.
  • the resins and any additives may be introduced to an extruder where the resins are meit-plastified by heating and then transferred to an extrusion ⁇ or coextrusion) die for formation into a tube.
  • Extruder and die temperatures will generally depend upon the particular resin or resin containing mixtures being processed and suitable temperature ranges for commercially available resins are generally known in the art, or are provided in technical bulletins made available by resin manufacturers. Processing temperatures ma vary depending upon other processing parameters chosen.
  • the thermoplastic film structures of the present invention may be produced using simple blown film processes which are described, for example, in The Encyclopedia of Chemical Technology, Kirk-Othmer, Third Edition, John Wiley & Sons, New York, 1981 , Vo!. 16, pp. 416-417 and Vol. 18, pp. 191 -192, the disclosures of which are incorporated herein by reference.
  • the simple blown film process may include an apparatus having a mufti-manifold circular die head through which the film layers are forced and formed into a cylindrical multilayer film bubble.
  • the bubble may b quenched, e.g., via cooled water bath, solid surface and/or air, and then ultimately collapsed and formed into a multilayer film. It is appreciated by a person of ordinary skill in the art that cast extrusion techniques may also be used to fabricate the film structures of the present invention.
  • Example 1 in a preferred embodiment, a substantially planar rigid laminate SO was formed by extrusion coating a 12.0 mi! (305 micron) rigid layer 100 of amorphous polyethylene terephthaiate (APET) onto the 2 nd outer layer of a 2.5 mil (63.5 micron) coextruded film 101 as described above in TABLE 3 using a poSyvinylidene dichlohde (PVDC-Adhesive) emulsion adhesive SERFENETM 2010 supplied by the Dow Chemical Company, Midland, Michigan.
  • PVDC-Adhesive poSyvinylidene dichlohde
  • a flexible second film 102 having a structure/composition as described in TABLE 4 was provided having a thickness of about 8.0 mil (about 152.4 micron) and thermoformed under vacuum to create a food cavity and a marginal flange surrounding the food cavity.
  • the thermoformed food cavity had a draw depth of at least 0.50 inch ( ,27 centimeter).
  • Flexible second film 102 was thermoformed in such a manner so that the 1 st outer layer formed an inside surface of the package.
  • a food item was placed inside the food cavity and the rigid laminate SO was then affixed to second thermoplastic film 102 under vacuum by heat sealing the 1 st outer layer of first thermoplastic film 101 to the 1 st outer layer of second thermoplastic film 102.
  • first thermoplastic film 101 to second thermoplastic film 102 was performed in such a manner as to provide a marginal flange having a width of af least 0.5 inch (1 ,27 centimeter) surrounding the thermoformed cavity and food item, and a continuous peelabie reseaiabie hermetic sea! having a width of at least 0,25 inch (0.635 centimeters) which is positioned at least 0.5 inch (1.27 centimeter) away from the thermoformed cavity enclosing the food stem.
  • a substantially planar rigid laminate 50 was formed by extrusion coating a 12.0 mil (305 micron) rigid layer 100 of amorphous polyethylene terephthaiate (APET) onto the 2 nd outer layer of a 2.5 mil (63.5 micron) coextruded film 101 as described above in TABLE 3 using a po!yviny!idene dichloride (PVDC-Adhesive) emulsion adhesive SERFENETM 2010 supplied by the Dow Chemical Company, Midland, Michigan.
  • a rigid second film 102 having a structure/composition as described in TABLE 6 was provided having a thickness of about 13.75 mil (about 349,25 micron) and thermoformed under vacuum to create a food cavity and a marginal flange surrounding the food cavity.
  • thermoformed food cavity had a draw depth of at least 1 inch (2.54 centimeter).
  • Rigid second thermoplastic film 102 was thermoformed in such a manner so that the 1 st outer layer of the film formed an inside surface of the package, A food item was placed inside the food cavity and rigid laminate S0 was then affixed to second thermoplastic film 102 by heat sealing the 1 st outer layer of first thermoplastic film 101 to the 1 st outer layer of second thermoplastic film 102.
  • first thermoplastic film 101 to second thermoplastic film 102 was performed in such a manner as to provide a marginal flange having a width of at least 0.5 inch (1.27 centimeter) surrounding the thermoformed cavity and food item, and a continuous peelabie reseaiabie hermetic seal having a width of at least 0.25 inch (0.635 centimeters) which is positioned at least 0,5 inch (1.27 centimeter) away from the thermoformed cavity enclosing the food item.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)

Abstract

La présente invention concerne un emballage amélioré, pelable et refermable hermétiquement, destiné à un article alimentaire non coupé ni découpé en portions, présentant une plateforme intégrée pour découper et servir la nourriture, et formé à partir d'un plan stratifié sensiblement rigide. Le plan stratifié sensiblement rigide comprend une couche rigide et un premier film thermoplastique. Les emballages de la présente invention comprennent également un second élément thermoplastique présentant une cavité thermoformée qui renferme l'article alimentaire et dispose d'une forme qui suit globalement celle de l'article alimentaire. L'emballage comprend en outre un rebord marginal planaire s'étendant autour de la cavité thermoformée, et un joint d'étanchéité hermétique continu refermable et pelable entourant l'article alimentaire, formé par thermoscellage du premier film thermoplastique au second film thermoplastique.
PCT/US2013/038331 2013-04-26 2013-04-26 Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée WO2014175891A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13882811.6A EP2989022A4 (fr) 2013-04-26 2013-04-26 Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée
BR112015026762A BR112015026762A2 (pt) 2013-04-26 2013-04-26 Embalagem descolável e revedável com plataforma de corte e serviço integrada
PCT/US2013/038331 WO2014175891A1 (fr) 2013-04-26 2013-04-26 Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2013/038331 WO2014175891A1 (fr) 2013-04-26 2013-04-26 Emballage pelable et refermable hermétiquement avec plateforme de découpe et de service intégrée

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WO2014175891A1 true WO2014175891A1 (fr) 2014-10-30

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EP (1) EP2989022A4 (fr)
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US20120187122A1 (en) * 2009-10-06 2012-07-26 Ultraperf Technologies Inc. Repositionable lidding film- seal activated
EP3245880A1 (fr) * 2016-05-17 2017-11-22 Savencia Sa Fromage emballe

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US20090304874A1 (en) * 2008-06-06 2009-12-10 Chad Stephens Laminated lidstock and package made therefrom

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JPS5962405A (ja) * 1982-09-30 1984-04-09 旭化成株式会社 スキンパツク包装体の製造方法
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CA2817743C (fr) * 2010-11-10 2019-01-08 The Hillshire Brands Company Emballage pour produit alimentaire

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US6056141A (en) * 1997-12-18 2000-05-02 Safta S.P.A. Reclosable packing system
US20090304874A1 (en) * 2008-06-06 2009-12-10 Chad Stephens Laminated lidstock and package made therefrom

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CHERUVANTHUR, R., THE EFFECT OF BOND STRENGTH OF FLEXIBLE LAMINATES ON PUNCTURE RESISTANCE., May 2009 (2009-05-01), pages 56 - 57, XP055279974 *
MORRIS, BA ET AL.: "More Flexural Strength for Thin Films.", KUNSTSTOFFE INTERNATIONA, May 2011 (2011-05-01), pages 2, XP055279972 *
See also references of EP2989022A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120187122A1 (en) * 2009-10-06 2012-07-26 Ultraperf Technologies Inc. Repositionable lidding film- seal activated
EP3245880A1 (fr) * 2016-05-17 2017-11-22 Savencia Sa Fromage emballe
FR3051321A1 (fr) * 2016-05-17 2017-11-24 Savencia Sa Article alimentaire

Also Published As

Publication number Publication date
EP2989022A4 (fr) 2016-12-21
BR112015026762A2 (pt) 2017-08-22
EP2989022A1 (fr) 2016-03-02

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