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WO2007033431A1 - Matériau pliable résistant à l’humidité et récipient errigé à partir d’une ébauche obtenue en se servant dudit matériau - Google Patents

Matériau pliable résistant à l’humidité et récipient errigé à partir d’une ébauche obtenue en se servant dudit matériau Download PDF

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Publication number
WO2007033431A1
WO2007033431A1 PCT/AU2006/001395 AU2006001395W WO2007033431A1 WO 2007033431 A1 WO2007033431 A1 WO 2007033431A1 AU 2006001395 W AU2006001395 W AU 2006001395W WO 2007033431 A1 WO2007033431 A1 WO 2007033431A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
sized paper
laminated sheet
paper
polymer layer
Prior art date
Application number
PCT/AU2006/001395
Other languages
English (en)
Inventor
George Ganzenmuller
Gordon Mellis
Buck Hill
Niels Reuvers
Frank Farchione
Jim Andrewartha
Original Assignee
Amcor Limited
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
Priority claimed from AU2005905228A external-priority patent/AU2005905228A0/en
Application filed by Amcor Limited filed Critical Amcor Limited
Priority to AU2006294427A priority Critical patent/AU2006294427B2/en
Priority to NZ566916A priority patent/NZ566916A/en
Publication of WO2007033431A1 publication Critical patent/WO2007033431A1/fr

Links

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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/001—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper stackable
    • B65D5/0015—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper stackable the container being formed by folding up portions connected to a central panel
    • B65D5/003—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper stackable the container being formed by folding up portions connected to a central panel having ledges formed by extensions of the side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/4295—Ventilating arrangements, e.g. openings, space elements
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/56—Linings or internal coatings, e.g. pre-formed trays provided with a blow- or thermoformed layer
    • B65D5/563—Laminated linings; Coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/02—Open containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • the present invention relates generally to foldable sheets and to containers which are erected from blanks which are fabricated from foldable sheets.
  • the present invention relates to moisture-resistant foldable sheets and containers which are erected from blanks which are fabricated from moisture-resistant foldable sheets.
  • These containers can be used, by way of example, for storing fruit and vegetable products in high humidity environments, in environments where water is splashed around or showered on the containers, or where the containers are left to sit on damp floors or in puddles, or for applications where the container and its contents may be immersed in water.
  • Laminated foldable sheets which are less prone to absorbing moisture have been developed to overcome this problem.
  • Such laminated sheets typically include a paperboard substrate and a layer of waterproof material such as polyethylene or polyethylene terephthalate (PET) laminated on at least one surface of the substrate.
  • PET polyethylene or polyethylene terephthalate
  • the layer of waterproof material is able to inhibit the substrate from absorbing moisture to a certain degree, moisture is still able to penetrate, via wicking, the substrate through the edges thereof which are not covered by the waterproof material.
  • a foldable laminated sheet comprising at least one inner polymer layer, at least one inner layer of sized paper, and a respective outer polymer layer on each side of the sheet.
  • the inner and outer polymer layers are able to inhibit the absorption of moisture through the surfaces of each layer of sized paper. Also, the presence of the at least one inner polymer layer increases the rigidity of the sheet.
  • the foldable laminated sheet includes at least one inner layer of sized paper on each side of each inner polymer layer.
  • Each inner polymer layer may be a layer of polyethylene, polypropylene or PET. hi a particular preferred form, each inner polymer layer is a layer of low density polyethylene (LDPE), or a layer of medium density polyethylene (MDPE) which is a blend of LDPE and high density polyethylene (HDPE).
  • LDPE low density polyethylene
  • MDPE medium density polyethylene
  • HDPE high density polyethylene
  • Each inner layer of sized paper is preferably a layer of kraft paper.
  • each inner layer of sized paper may be a layer of 270 grams per square metre (gsm) kraft paper, 165 gsm kraft paper, or hard sized 440 gsm recycled paper which is a 100% recycled paper.
  • Each inner layer of sized paper is preferably hard sized to limit the amount of moisture which it is able to absorb through the edges of the cut sheet.
  • each inner layer of sized paper is hard sized to a water absorptiveness level which is low enough to resist wicking of water into each layer of sized paper and which is high enough so as not to resist bonding with an adhesive such as, for example, polyvinyl acetate (PVA).
  • PVA polyvinyl acetate
  • each layer of sized paper is hard sized to a water absorptiveness level of 80 to 100 gsm per 30 minutes as measured by the Australian
  • each layer of sized paper is hard sized to a water absorptiveness level of 90 gsm per
  • Each outer polymer layer may be a layer of polyethylene, polypropylene or PET. hi a particular preferred form, each outer polymer layer is a layer of low density polyethylene (LDPE). Each outer polymer layer is preferably corona discharge treated.
  • a particular preferred embodiment of the foldable laminated sheet comprises a pair of inner polymer layers, a respective first inner layer of sized paper laminated on each inner polymer layer, wherein the first inner layers of sized paper are adhered to each other, a respective second inner layer of sized paper laminated on each inner polymer layer, and a respective outer polymer layer laminated on each second inner layer of sized paper.
  • the inner polymer layers are preferably layers of MDPE.
  • the first inner layers and the second inner layers of sized paper are preferably layers of kraft paper.
  • the first inner layers and the second inner layers of sized paper are layers of 270 gsm kraft paper.
  • the first inner layers of sized paper are preferably adhered to each other with PVA glue.
  • the outer polymer layers are preferably layers of LDPE.
  • the foldable laminated sheet comprises an inner polymer layer, a respective first inner layer of sized paper laminated on each side of the inner polymer layer, a respective second inner layer of sized paper adhered to each first inner layer of sized paper, and a respective outer polymer layer laminated on each second inner layer of sized paper.
  • the inner polymer layer is preferably a layer of MDPE.
  • the first inner layers of sized paper may be layers of kraft paper or layers of recycled paper, hi one particular preferred form, the first inner layers of sized paper are layers of 270 gsm kraft paper. In another particular preferred form, the first inner layers of sized paper are layers of 440 gsm recycled paper. Also, the first inner layers of sized paper are preferably adhered to the second inner layers of sized paper with PVA glue.
  • the second inner layers of sized paper may be layers of kraft paper or layers of recycled paper, hi one particular preferred form, the second inner layers of sized paper are layers of 270 gsm kraft paper. In another particular preferred form, the second inner layers of sized paper are layers of 165 gsm kraft paper.
  • the outer polymer layers are preferably layers of LDPE.
  • the foldable laminated sheet is preferably used to make containers adapted to hold fruit, vegetables, meat, fish or other produce. According to a second broad aspect of the present invention there is provided a method of producing a foldable laminated sheet, the method comprising the steps of:
  • the step of laminating at least one inner layer of sized paper on at least one inner polymer layer involves laminating at least one inner layer of sized paper on each side of each inner polymer layer.
  • the method preferably includes the step of corona discharge treating the outer polymer layers of the laminated sheet.
  • the layers of the laminated sheet are laminated together by a corrugating/laminating machine using an adhesive.
  • a container which is erected from a blank which is fabricated from a foldable laminated sheet comprising at least one inner polymer layer, at least one inner layer of sized paper, and a respective outer polymer layer on each side of the sheet.
  • each inner layer of sized paper there is at least one inner layer of sized paper on each side of each inner polymer layer.
  • the container ' may be any suitable type of container.
  • the container is a tray.
  • the tray is a stackable tray.
  • the container is preferably adapted to hold fruit, vegetables, meat, fish or other produce.
  • Figure 1 depicts the layers of a foldable laminated sheet according to a first preferred embodiment of the present invention
  • Figure 2 depicts the layers of a foldable laminated sheet according to a second preferred embodiment of the present invention
  • Figure 3 depicts the layers of a foldable laminated sheet according to a third preferred embodiment of the present invention
  • Figure 4 depicts a blank which is able to be erected into a tray and which is fabricated from any one of the laminated sheets illustrated in figures 1 to 3;
  • Figure 5 depicts a tray which is erected from the blank illustrated in figure 4;
  • Figure 6 depicts another blank which is able to be erected into a tray and which is fabricated from any one of the laminated sheets illustrated in figures 1 to 3; and
  • Figure 7 depicts a tray which is erected from the blank illustrated in figure 6.
  • a foldable laminated sheet 20 includes two inner layers 21 of 270 gsm kraft paper that are adhered to each other with polyvinyl acetate (PVA) adhesive 22.
  • a respective inner layer 23 of medium density polyethylene (MDPE) is laminated on each of the layers 21, and a respective inner layer 24 of 270 gsm kraft paper is laminated on each of the layers 23.
  • a respective outer layer 25 of low density polyethylene (LDPE) is laminated on each of the layers 24.
  • MDPE medium density polyethylene
  • LDPE low density polyethylene
  • a foldable laminated sheet 30 includes an inner layer 31 of MDPE.
  • a respective inner layer 32 of 270 gsm kraft paper is laminated on each side of the layer 31.
  • Each layer 32 has a respective inner layer 33 of 270 gsm kraft paper adhered thereto with PVA adhesive 34.
  • a respective outer layer 35 of LDPE is laminated on each of the layers 33.
  • a foldable laminated sheet 40 includes an inner layer 41 of MDPE and a respective inner layer 42 of hard sized 440 gsm 100% recycled paper (i.e. T40 paper) laminated on each side of the layer 41.
  • the code "T40" signifies a particular type of paper developed by the applicant.
  • a respective inner layer 43 of 165 gsm kraft paper is adhered to each layer 42 with PVA adhesive 44.
  • a respective outer layer 45 of LDPE is laminated on each layer 43.
  • Each paper layer 21, 24, 32, 33, 42, 43 is hard sized to a specific water absorptiveness level which is low enough to resist wicking of water into the paper, and which is high enough so as not to resist bonding of the PVA adhesive 22, 34, 44. It has been found that an absorptiveness level of approximately 90 gsm/30 minutes as measured by the Cobb Test meets these requirements.
  • the LDPE layers 25, 35, 45 are applied in-line on to the paper layers 24, 33, 43 and are then corona discharge treated to facilitate hot melt bonding and elementary printing thereon.
  • the LDPE layers 25, 35, 45 may be clear or they may be coloured. For example, if coloured, the LDPE layers 25, 35, 45 may be black or white.
  • the medium density polyethylene which forms the MDPE layers 23, 31, 41 is a blend of low density polyethylene and high-density polyethylene polymers.
  • the MDPE layers 23, 31, and 41 respectively function as tie layers between the paper layers 21 and 24, 32, and 42 of the sheets 20, 30, and 40, and as secondary moisture barriers. Also, the presence of the MDPE layers 23, 31, 41 increases the stiffness and compressive strength of the sheets 20, 30, 40.
  • the various paper and polymer layers of the sheets 20, 30, 40 that are not adhered together with the PVA adhesive 22, 34, 44 are laminated together.
  • the paper layers 21, 32, 33, 42, 43 of the sheets 20, 30, 40 are then laminated and adhered using a conventional corrugating machine.
  • PVA adhesive is used for adhering the paper layers 21, 32, 33, 42, 43 of the sheets 20, 30, 40 together as it is moisture resistant.
  • Sheets 20, 30, 40 are sufficiently water resistant that they are able to withstand being submerged for a short period of time as measured by the Cobb and Board Wicking Tests without any adverse affects. Moreover, the sheets 20, 30, 40 have a high compressive strength as measured by the Australian Standards AS 1301 Edgewise Compression Test.
  • the corona discharge treatment of the LDPE layers 25, 35, 45 of the sheets 20, 30, 40 allows printing or an adhesive to key to the LDPE layers 25, 35, 45. hi addition, the corona discharge treatment facilitates the erection of containers from blanks which are fabricated from the sheets 20, 30, 40.
  • the LDPE layers 25, 35, 45 of the sheets 20, 30, 40 also provide a surface which is approved by the FDA for contact with food.
  • the rigidity of the sheets 20, 30, 40 limits the amount by which the sides of containers which are fabricated from the sheets 20, 30, 40 are able to bulge. If the containers are trays, this can reduce the occurrence of telescope failure of the trays which can occur when a load which rests on top of the sides of a tray causes the sides of the tray to bulge to such an extent that the load slips into the tray.
  • Figure 4 depicts a blank 50 which may be fabricated from any one of the laminated sheets 20, 30, 40 and which is able to be erected into a stackable tray.
  • Blank 50 includes a generally rectangular bottom wall panel 51 which includes a plurality of circular ventilation openings 52.
  • a pair of opposing outer side wall panels 53 is hinged to the bottom wall panel 51 along double fold lines 54.
  • the outer side wall panels " 53 are generally rectangular-shaped.
  • Each outer side wall panel 53 has a respective series of cuts 55 located adjacent to each end thereof. The cuts extend into the outer LDPE layers on the exterior faces of the outer side wall panels 53.
  • a respective pair of corner stacking tab-receiving openings 56 is located between the bottom wall panel 51 and each of the outer side wall panels 53.
  • a respective rectangular inner side wall panel 57 is hinged to each of the outer side wall panels 53 along a double fold line 58.
  • a pair of opposing end wall panels 59 is hinged to the bottom wall panel 51 along double fold lines 60.
  • the end wall panels 59 are rectangular-shaped, and each end wall panel 59 includes a pair of elongate ventilation openings 61.
  • a respective pair of opposing first corner post panels 62 is hinged to each of the end wall panels 59 along double fold lines 63.
  • a respective second corner post panel 64 is hinged to each of the first corner post panels 62 along a double fold line 65.
  • a respective corner stacking tab-receiving recess 66 extends into each pair of hinged first and second corner post panels 62, 64 from a lower edge thereof. Also a respective corner stacking tab 67 extends from each pair of hinged first and second corner post panels 62, 64 from an upper edge thereof.
  • a respective securing flap 68 is hinged to each of the second corner post panels 64 along a double fold line 69.
  • a respective H-shaped cut 70 forms a discontinuity in each of the fold lines 69.
  • a respective closure flap 71 is hinged to each end wall panel 59 along a double fold line 72.
  • Each closure flap 71 has a curved recess 73 in a free edge 74 thereof.
  • a respective pair of opposing securing flaps 75 is hinged to each of the closure flaps 71 along double fold lines 76.
  • a respective corner stacking tab-receiving recess 77 is located between each of the securing flaps 75 and the closure flap 71 to which the securing flap 75 is hinged.
  • Figure 5 depicts a tray 80 which has been erected from the blank 50 and which may be used to hold fruit, vegetables, meat, fish or other produce.
  • Tray 80 is erected by folding the first corner post panels 62 relative to the end wall panels 59 along the fold lines 63 so that the first corner post panels 62 are perpendicularly upstanding from the interior faces of the end wall panels 59.
  • the second corner post panels 64 are then folded relative to the first corner post panels 62 along the fold lines 65, and the securing flaps 68 are folded relative to the second corner post panels 64 along the fold lines 69 so that the securing flaps 68 overlie the interior faces of the end wall panels 59 and so that the second corner post panels 64 extend between the first corner post panels 62 and the end wall panels 59.
  • the securing flaps 68 are adhered to the end wall panels 59.
  • the inner side wall panels 57 are then folded relative to the outer side wall panels 53 along the fold lines 58 so that the inner side wall panels 57 overlie the interior faces of the outer side wall panels 53.
  • the inner side wall panels 57 are adhered to the outer side wall panels 53.
  • the outer side wall panels 53 are then folded relative to the bottom wall panel 51 along the fold lines 54 so that the outer side wall panels 53 are upstanding from the bottom wall panel 51.
  • the closure flaps 71 are then folded relative to the end wall panels 59 along the fold lines 72 so that the closure flaps 71 extend towards each other and so that each comer stacking tab 67 extends through a respective corner stacking tab-receiving recess 77.
  • the securing flaps 75 are folded relative to the closure flaps 71 along the fold lines 76 so that the securing flaps 75 overlie the exterior faces of the outer side wall panels 53 and, in particular, overlie the cuts 55.
  • the securing flaps 75 are then adhered to the outer side wall panels 53.
  • the cuts 55 assist in bonding the adhesive to the exterior faces of the outer side wall panels 53 which are coated with a layer of LDPE.
  • Figure 6 depicts a blank 90 which may be fabricated from any one of the laminated sheets 20, 30, 40 and which is able to be erected into a stackable tray.
  • a blank 90 which may be fabricated from any one of the laminated sheets 20, 30, 40 and which is able to be erected into a stackable tray.
  • features of the blank 90 which are the same as or which are similar to features of the blank 50 are referenced using the same reference numbers.
  • blank 90 does not include corner stacking tab-receiving openings 56 located between the bottom wall panel 51 and each of the outer side wall panels 53. Instead, the blank 90 has a respective pair of stacking tab-receiving openings 91 located between the bottom wall panel 51 and each of the end wall panels
  • Blank 90 also differs from the blank 50 in that each of the end wall panels 59 of the blank 90 include a pair of stacking tabs 92 extending therefrom. Also, the first and second corner post panels 62, 64 of the blank 90 do not include a corner stacking tab-receiving recess 66 or a corner stacking tab 67. Moreover, a respective stacking tab 93 extends from an upper edge of each of the securing flaps 68, and a respective stacking tab-receiving recess 94 extends into each of the securing flaps 68 from a lower edge thereof.
  • a respective pair of stacking tab-receiving openings 95 is located between each of the end wall panels 59 and closure flaps 71 of the blank 90. Also, the blank
  • Figure 7 depicts a tray 100 which has been erected from the blank 90 and which may be used to hold fruit, vegetables, meat, fish or other produce..
  • Tray 100 is erected by folding the first corner post panels 62 relative to the end wall panels 59 along the fold lines 63 so that the first corner post panels 62 are perpendicularly upstanding from the interior faces of the end wall panels 59.
  • the second corner post panels 64 are then folded relative to the first corner post panels 62 along the fold line 65, and the securing flaps 68 are folded relative to the second corner post panels 64 along the fold lines 69 so that the securing flaps 68 overlie the interior faces of the end wall panels 59 and so that the second corner post panels 64 extend between the first corner post panels 62 and the end wall panels 59.
  • Each stacking tab 93 overlies a respective stacking tab 92.
  • the securing flaps 68 are adhered to the end wall panels 59.
  • the inner side wall panels 57 are then folded relative to the outer side wall panels 53 along the fold lines 58 so that the inner side wall panels 57 overlie the interior faces of the outer side wall panels 53.
  • the inner side wall panels 57 are adhered to the outer side wall panels 53.
  • the outer side wall panels 53 are then folded relative to the bottom wall panel 51 along the fold lines 54 so that the outer side wall panels 53 are upstanding from the bottom wall panel 51.
  • closure flaps 71 are then folded relative to the end wall panels 59 along fold lines 72 so that the closure flaps 71 extend towards each other and so that each pair of overlying stacking tabs 92, 93 extends through a respective stacking tab- receiving opening 95.
  • the securing flaps 75 are folded relative to the closure flaps 71 along the fold lines 76 so that the securing flaps 75 overlie the exterior faces of the outer side wall panels 53 and, in particular, overlie the cuts 55.
  • the securing flaps 75 are then adhered to the outer side wall panels 53.
  • the cuts 55 assist in bonding the adhesive to the exterior faces of the outer side wall panels 53 which are coated with a layer of LDPE.
  • the blanks 50, 90 are fabricated from the sheets 20, 30, 40 using a rotary die- cutter machine which includes means for forming the various double fold lines of the blanks 50, 90.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Laminated Bodies (AREA)

Abstract

La présente invention concerne une feuille (20) stratifiée pliable qui comprend au moins une couche polymère interne (23), au moins une couche interne (21, 24) de papier collé, et une couche polymère externe (25) respective de chaque côté de la feuille (20).
PCT/AU2006/001395 2005-09-22 2006-09-22 Matériau pliable résistant à l’humidité et récipient errigé à partir d’une ébauche obtenue en se servant dudit matériau WO2007033431A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2006294427A AU2006294427B2 (en) 2005-09-22 2006-09-22 Moisture resistant foldable material and container erected from blank fabricated therefrom
NZ566916A NZ566916A (en) 2005-09-22 2006-09-22 Moisture resistant foldable material and container erected from blank

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AU2005905228A AU2005905228A0 (en) 2005-09-22 Moisture Resistant Foldable Material and Container Erected from Blank Fabricated Therefrom
AU2005905228 2005-09-22

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WO2007033431A1 true WO2007033431A1 (fr) 2007-03-29

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PCT/AU2006/001395 WO2007033431A1 (fr) 2005-09-22 2006-09-22 Matériau pliable résistant à l’humidité et récipient errigé à partir d’une ébauche obtenue en se servant dudit matériau

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AU (1) AU2006294427B2 (fr)
NZ (1) NZ566916A (fr)
WO (1) WO2007033431A1 (fr)

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WO2016089317A1 (fr) * 2014-12-05 2016-06-09 Erhan İbak Casier pour fruits et légumes en papier kraft

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GB201205243D0 (en) 2012-03-26 2012-05-09 Kraft Foods R & D Inc Packaging and method of opening
GB2511559B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging
GB2511560B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging

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JPH11188816A (ja) * 1997-12-26 1999-07-13 Nihon Tetrapak Kk 紙容器用原紙、紙容器用原紙の製造法、紙容器用包材及び紙容器
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US4701360A (en) * 1986-05-16 1987-10-20 International Paper Company Heat sealable barrier material for improved juice packaging (EVOH)
JPH10138413A (ja) * 1996-11-14 1998-05-26 Dainippon Printing Co Ltd 紙容器形成用積層材、およびそれを使用した包装用紙容器
JPH11188816A (ja) * 1997-12-26 1999-07-13 Nihon Tetrapak Kk 紙容器用原紙、紙容器用原紙の製造法、紙容器用包材及び紙容器
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NZ566916A (en) 2009-12-24
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