WO2004007195A1 - Materiau d'emballage thermoscellable et emballage pour produit ferme fabrique a partir dudit materiau - Google Patents

Materiau d'emballage thermoscellable et emballage pour produit ferme fabrique a partir dudit materiau Download PDF

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Publication number
WO2004007195A1
WO2004007195A1 PCT/FI2003/000555 FI0300555W WO2004007195A1 WO 2004007195 A1 WO2004007195 A1 WO 2004007195A1 FI 0300555 W FI0300555 W FI 0300555W WO 2004007195 A1 WO2004007195 A1 WO 2004007195A1
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WO
WIPO (PCT)
Prior art keywords
layer
heat
packaging material
sealing
polymer
Prior art date
Application number
PCT/FI2003/000555
Other languages
English (en)
Inventor
Jalliina Järvinen
Tapani Penttinen
Kimmo Nevalainen
Original Assignee
Stora Enso Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stora Enso Oyj filed Critical Stora Enso Oyj
Priority to AU2003244674A priority Critical patent/AU2003244674A1/en
Publication of WO2004007195A1 publication Critical patent/WO2004007195A1/fr

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Classifications

    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B65D65/02—Wrappers or flexible covers
    • B65D65/16—Wrappers or flexible covers with provision for excluding or admitting light
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • 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
    • B32B2329/00—Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
    • 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
    • B32B2377/00—Polyamides
    • 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 invention relates to a heat-sealable packaging material comprising a core layer of fibrous material and a polymer heat-sealing layer on at least one side of the core layer, the heat-sealing layer comprising at least one pigment colouring the packaging material.
  • the invention relates to a closed product package formed of such packaging material by heat sealing, in which the pigmented polymer heat- sealing layer is located within the package.
  • the material By providing a fibre-based packaging material with a polymer coating layer that softens or melts under the action of heat, the material will be usable in product packages closed by heat sealing, such as package casings and containers.
  • the package can be made liquid-proof by means of a heat-sealable polymer coating.
  • especially food packages are required to be oxygen and aroma- proof and to shield the product from light, and this aim is achieved by means of ap- intestinaltely selected coating materials layered on a fibrous substrate.
  • a fibre-based packaging material has been provided with an aluminium foil, which yields a liquid, oxygen and aroma-proof package, while providing efficient protection from the penetration of visible light and UV radiation.
  • an aluminium foil is non biodegradable, thus making recy- cling difficult, and also a costly solution, it has been increasingly replaced with polymer coating materials, the chief materials among these being ethylene vinyl alcohol copolymer (EVOH), polyamide (PA) and polyethylene terephtalate (PET).
  • EVOH ethylene vinyl alcohol copolymer
  • PA polyamide
  • PET polyethylene terephtalate
  • US patent specification 4,513,050 describes packaging materials with a multi-layer coating, in which the polymer layer within the outermost heat-sealable polymer layer contains light-shielding pigments.
  • JP Patent Application 6135439 discloses a polymer-coated packaging paper, in which the outermost coating layer forms a heat- sealing layer with a thickness of 30 to 150 ⁇ m and the pigmented layer within this forms a light-shielding layer.
  • US patent specification 4,576,865 describes a polymer-coated packaging paper, in which the outer coating layer acts as a heat-sealing layer and the inner, pigmented layer forms a light-shielding layer.
  • the outer coating layer acts as a heat-sealing layer
  • the inner, pigmented layer forms a light-shielding layer.
  • light-shielding pigments have been incorporated also in the outer heat-sealing layer, and in this publication, also the inner pigmented layer contributes to light shielding.
  • the essential feature in the publication is that the different layers are based on different polymers. Good neck-in, easy striping from the roll and non-sticking are the properties sought for the coating.
  • WO patent specification 01/76976 discloses mixing a light-absorbing pigment into the polymer heat-sealing layer of a packaging board.
  • the publication describes especially packaging boards in which the heat-sealing layer forming the inner surface of the package has been coloured grey by blending carbon black and titanium dioxide that so that the coloured layer imitates the appearance of the aluminium foil inside a conventional package. This makes it considerably easier to make the solution acceptable in the market.
  • the incorporation of colouring pigments specifically in a heat-sealing layer is due to the fact that blended pigments in the amounts used in the publication do not interfere with the heat sealability of the polymer. Added to an oxygen or aroma barrier layer, the pigments may deteriorate the barrier properties of the layer.
  • a heat-sealable layer has the benefit of relative thickness compared to the barrier layers mentioned above; in a thicker layer, the pigment concentration may be lower and the pigments achieve regular, visually flawless covering. In some countries, such as Japan, for instance, authority regulations do not permit that said pigments contact a packaged food. As a result of this, the packaging material in the applications described in the embodiment examples of WO 01/76976 cannot be marketed or used for food packages in these countries.
  • the purpose of the present invention is to find a solution to avoid the problem above caused by pigmented packaging materials.
  • the fibre-based heat-sealable packaging material of the invention is characterised by the heat-sealing layer being formed in two parts, comprising an inner layer containing the colouring pigment, and an outer transparent layer forming the surface of the packaging material, both of said heat-sealable layers containing the same heat-sealable polymer, and the outer transparent layer having a weight of 5 to 20 g/m 2 and the inner pigmented layer having a thickness greater than that of the outer transparent layer.
  • the inventive idea is to maintain the colouring pigment or pigments of the packaging material in the polymer heat-sealing layer, while embedding them under the outer layer portion free from pigments so as to avoid contact with the packaged product.
  • the heat-sealing polymer of this outer layer being colourless, it does not prevent the pigments contained in the inner layer from being visible and from de- termining the colour shade of the material.
  • the outer heat-sealing layer is preferably relatively thin, while the inner pigmented heat-sealing layer has a thickness close to the conventional material thickness of the heat-sealing layer described in the WO reference mentioned above, so that the visual advantages of the previous solution, such as regular coverage by pigmenting, are maintained.
  • the successive heat-sealing layers of the packaging material of the invention containing the same heat-sealing polymer are mutually different only in the respect that the inner layer contains one or more colouring pigments evenly dispersed, whereas the outer layer is unpigmented.
  • successive heat- sealing layers based on the same polymer formed separately by co-extrusion, for instance there will be no sticking problem between the layers.
  • these layers will melt and both contribute to forming a seam, thus acting as one single integrated heat-sealing layer.
  • the outer, unpigmented heat-sealing layer is formed with a smaller thickness than that of the inner pigmented layer.
  • the minimum thickness of the outer layer depends on the available extrusion technique and on the ability of the polymer to form a continuous film.
  • the outer, unpigmented heat-sealing layer may account for e.g. 10 to 40%, preferably 15 to 30% of the total thickness of the outer and the inner unpigmented heat-sealing layers.
  • the weight of the outer, unpigmented heat- sealing layer may vary in the range from 5 to 20 g/m 2 , preferably 7 to 15 g/m 2 , and the weight of the inner, pigmented layer may be 25 to 70 g/m , preferably 30 to 45 g/m 2 .
  • LDPE low-density polyethylene
  • the black pigment concentration in the inner heat-sealing layer may be in the range from 0.05 to 0.5 w%, more preferably 0.1 to 0.2 w% and most preferably 0.12 to 0.15%. If the layer is tinted grey by adding white pigment, such as titanium dioxide, the white pigment concentration in the inner heat-sealing layer may be 5 to 25 w%, preferably about 5 to 15% and most preferably 7 to 12%.
  • a heat-sealing composition is achieved, which, when applied to a board, looks so much like an aluminium foil that it could be mistaken as such.
  • LDPE low-density polyethylene
  • one side of the fibre substrate can remain uncoated if desired.
  • the fibre substrate is nevertheless equipped with a polymer heat-sealing layer on both sides, preferably with the use of the same polymer in all of the heat-sealing layers.
  • the coating layer may be colourless, i.e. free from pigment, thus not preventing visibility of prints on the package.
  • the desired colour shade can be achieved by pigmenting also the outer surface of the package.
  • the packaging material is made oxygen, fat and aroma-proof by inserting one or more polymer barrier layers between the fibre substrate and the heat-sealing layer, the barrier layers being made e.g. of ethylene vinyl alcohol polymer (EVOH), polyamide (PA), polyethylene terephtalate (PET) or a mixture of these.
  • EVOH ethylene vinyl alcohol polymer
  • PA polyamide
  • PET polyethylene terephtalate
  • the fibre-based product package sealed by heat sealing in accordance with the invention is characterised by the heat-sealing layer within the package being formed in two parts, so that it comprises a pigmented layer and a transparent layer insulat- ing the pigmented layer from the packaged product and forming the inner surface of the package, with both of said heat-sealing layers containing the same heat-sealable polymer, and the weight of the transparent layer being 5 to 20 g/m and the pigmented layer being thicker than the transparent layer.
  • black and white pigments e.g. carbon black and titanium dioxide
  • the inner surface of the package can be given a grey tint, so that it shields the packaged product from light and also resembles an aluminium foil.
  • the package of the invention is preferably a package for perishable foodstuffs, such as a milk or juice container.
  • the invention is also very useful in package casings without an inner bag for dry foodstuffs.
  • Figure 1 illustrates a polymer-coated heat-sealable packaging material 1 of the invention in its most straightforward form.
  • It is a coated packaging board, in which the core layer of fibrous material, i.e. the fibre substrate 3, is uncoated on one side and coated on the other side with two successive heat-sealing layers 7,8 of low- density polyethylene (LDPE).
  • the inner layer 7 of these comprises one or more pigments, e.g. carbon black or titanium dioxide evenly dispersed in polymer, which together give the layer a grey tint, so that it resembles an aluminium foil.
  • the outer LDPE layer 8 free from pigments is colourless, and hence does not cover the view of the inner grey-coloured layer 7.
  • the application of the packaging material 1 of the invention shown in figure 2 differs from that of figures 1 only in that a colourless heat-sealing layer 2 made of low- density polyethylene (LDPE) and free from pigments has been disposed on the opposite side of the fibre substrate 3.
  • LDPE low- density polyethylene
  • the packaging material 1 of figure 3 again, differs from figure 1 in that an oxygen barrier layer 4 and a binder layer 6 made of ethylene vinyl alcohol copolymer (EVOH) have been placed between the fibre substrate 3 and the heat-sealing layers 7, 8 in order to bind the oxygen barrier layer to the heat-sealing layers.
  • a suitable binder consists e.g. of low-density polyethylene modified with maleic anhydride.
  • Figure 4 shows a packaging material 1 suitable especially as package of liquid foodstuffs, such as dairy product or juice containers, which is a combination of the layer structures of figures 2 and 3.
  • the material 1 in figure 4 is layered in the following order: an LDPE heat-sealing layer 2, a fibre substrate 3, an EVOH barrier layer 4, a binder layer 6, a pigmented LDPE heat-sealing layer 7 and an unpigmented, transparent LDPE heat-sealing layer 8.
  • black and white pigments to the inner heat-sealing layer 7, the material 1 will get a grey aspect resembling an aluminium foil.
  • the EVOH barrier layer 4 and the LDPE heat-sealing layers 7, 8 including their pigments will be located inside the package.
  • Figures 5 to 8 show variants of the packaging material 1 of figure 4.
  • the material of the barrier layer 4 is polyethylene terephtalate (PET).
  • PET polyethylene terephtalate
  • the barrier layer 4 has been formed by blending polyamide (PA) into EVOH.
  • PA polyamide
  • Two adjacent barrier layers 4, 5 have been incorporated in the material of figure 7, the layer 4 closer to the fibre substrate 3 being made of poly- amide and the outer layer 5 of EVOH.
  • the order of the barrier layers 4, 5 has been inversed; the inner layer closer to the fibre substrate 3 is an EVOH layer 4 and the outer is a PA layer 5.
  • the materials of figures 5 to 8 are also suitable as liquid and oxygen-proof packages of especially liquid foodstuffs, which shield the product from light.
  • the preferred production technique for the polymer-coated packaging materials shown in figures 1 to 8 is co-extrusion, in which successive layers 4 to 8 are brought on top of the fibrous substrate 3 in one single step.
  • the fibrous substrate 3 of the packaging material 1 may preferably comprise a packaging board containing bleached sulphate pulp and having a weight of at least 130 to 500 g/m 2 , preferably 170 to 300 g/m 2 .
  • the heat-sealing layer 2 forming the outer surface of the package which is most preferably made of polyolefin, such as LDPE, may have a weight from 5 to 50 g/m 2 , preferably 7 to 40 g/m 2 .
  • the amounts of barrier layers 4, 5 and binder layers 6 may be 3 to 15 g/m 2 , preferably 5 to 10 g/m 2 .
  • the weight of the inner pigmented heat-sealing layer 7 in the material 1 may be 25 to 70 g/m 2 , preferably 30 to 45 g/m 2
  • the outer, unpigmented heat- sealing layer 8 may have a weight of 5 to 20 g/m 2 , preferably 7 to 15 g/m 2
  • the polymer material of these adjacent heat-sealing layers 7, 8 is most preferably the same as the polymer of the heat-sealing layer 2 forming the outer surface of the package. This polymer is most preferably LDPE.
  • the pigments in the pigmented heat-sealing layer 7 may consist of carbon black in a concentration of 0.05 to 0.5% in the layer, preferably about 0.12 to 0.15%, and titanium dioxide accordingly in a concentration of 5 to 25%, preferably about 7 to 12%.
  • the packaging material 1 of the invention which has been exemplified above, can be produced as a continuous web punched to form blanks, which are further folded and heat-sealed to form closed food product packages.
  • the heat-sealing temperature may be about 250°C or even more depending on the packaging efficiency.
  • the products to be packaged are especially liquid foodstuffs, such as milk, cream, sour milk, yoghurt, ice cream and similar dairy products, juices, wine and water.
  • the material is also suitable as a casing package of dry foodstuffs, such as flour, powders, flakes, cereals, crackers and animal food.
  • the products may also be closed tins for prepared food, in which both the tin and the lid are made of the impermeable packaging material of the invention.
  • the packages may be modified atmosphere packages (MAP) or packages sterilised by autoclave treatment.
  • the light-shielding properties of the layer toned grey with carbon black and titanium dioxide included in the packaging material and product package of the invention have been determined by measurements in the applicant's previous WO publication 01/76976 mentioned above, to which we refer in this context and which is incorporated by this reference in the description of the present application. These particular tests indicated that 75% of the ascorbic acid contained in the juice remained at the end of five weeks of storage owing to the light shield. In a product package otherwise identical, but devoid of light-shielding pigments, only about one third of the ascorbic acid remained at the end of five weeks of storage. Given the per se identical light shield of the material of the invention and the only difference from the previous measurements being that the pigmented layer is embedded into the material, it is obvious that the previous measurement results apply as such to the material and the packages of the present invention.
  • the packaging materials of the invention may be packing papers, in which the weight of the fibrous substrate is less than 130 g/m J. , mos _t. appropri -a_*te_ ⁇ l_y_ i ⁇ n j t.1h.e . range j fr* om 40 _ t.o_ ⁇ 120 g _//_m2.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)
  • Wrappers (AREA)

Abstract

Cette invention concerne un matériau d'emballage thermoscellable et un emballage pour produit fermé fabriqué à partir dudit matériau, qui convient particulièrement pour l'emballage de denrées alimentaires. Le matériau d'emballage (1) comprend une couche centrale (3) en papier ou en carton, et des couches en polymère thermoscellable (2, 7, 8) sur un côté, de préférence sur les deux côtés, de la couche centrale. Selon l'invention, deux couches successives contenant le même polymère thermoscellable sont disposées dans le matériau d'emballage, un pigment de coloration du matériau d'emballage étant incorporé dans la couche intérieure thermoscellable plus épaisse (7) tandis que la couche extérieure plus mince (8) est transparente. La couche intérieure (7) peut contenir un pigment noir de protection contre la lumière, tel que le noir de carbone, mais aussi un pigment blanc, tel que le dioxyde de titane, de sorte que les pigments confèrent ensemble à la couche une teinte grise. Cette couche grise (7), qui présente l'aspect d'une feille d'aluminium, est placée à l'intérieur de la couche centrale (3) dans l'emballage. Le polymère thermoscellable peut être constitué d'un polyéthylène basse densité (PEBD), et des couches barrière polymériques peuvent être incorporées dans le matériau (1) pour fournir un matériau étanche à l'air, aux graisses et aux arômes, tel qu'une barrière à l'oxygène (4) de copolymère d'éthylène alcool de vinyle (EVOH)
PCT/FI2003/000555 2002-07-11 2003-07-09 Materiau d'emballage thermoscellable et emballage pour produit ferme fabrique a partir dudit materiau WO2004007195A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003244674A AU2003244674A1 (en) 2002-07-11 2003-07-09 Heat-sealable packaging material and a closed product package made thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20021359 2002-07-11
FI20021359A FI20021359A (fi) 2002-07-11 2002-07-11 Kuumasaumautuva pakkausmateriaali sekä siitä muodostettu suljettu tuotepakkaus

Publications (1)

Publication Number Publication Date
WO2004007195A1 true WO2004007195A1 (fr) 2004-01-22

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AU (1) AU2003244674A1 (fr)
FI (1) FI20021359A (fr)
WO (1) WO2004007195A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074130A1 (fr) * 2003-02-21 2004-09-02 Stora Enso Oyj Emballage de pour produits sterilises thermoscelles, materiau d'emballage et emploi de ce materiau
WO2006073342A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Procede de fabrication d'un stratifie d'emballage fin et procede de formation d'un receptacle d'emballage
WO2006073341A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Stratifie d'emballage fin et receptacle d'emballage obtenu a partir de celui-ci
ITVA20090027A1 (it) * 2009-04-17 2010-10-18 Masterpack S P A Accoppiato di carta ed almeno due pellicole di plastica degradabile con barriera all'umidita' e all'ossigeno e sacchetti termosaldati di confezionamento
US8178180B2 (en) 2006-07-27 2012-05-15 Stora Enso Oyj Polymer-coated heat-sealable packaging material and a sealed package manufactured thereof
US9248622B2 (en) 2004-02-25 2016-02-02 Stora Enso Oyj Method for sealing a fiber-based material
EP4137316A4 (fr) * 2020-03-25 2023-11-22 Lami Packaging (Kunshan) Co., Ltd Matériau d'emballage composite et son procédé de fabrication

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513050A (en) * 1982-04-26 1985-04-23 Fuji Photo Film Co., Ltd. Material for packaging light-sensitive materials
US4521437A (en) * 1982-06-02 1985-06-04 Du Pont Canada Inc. Pouches of ethylene/octene-1 copolymer film containing a flowable material
US4576865A (en) * 1982-10-13 1986-03-18 Fuji Photo Film Co., Ltd. Materials for packaging light-sensitive materials
JPH06135439A (ja) * 1992-10-27 1994-05-17 Dainippon Printing Co Ltd 容 器
WO1997002948A1 (fr) * 1995-07-07 1997-01-30 Tetra Laval Holdings & Finance S.A. Feuille mince multicouche et sacs realises a l'aide de celle-ci
WO2001076976A1 (fr) * 2000-04-10 2001-10-18 Stora Enso Oyj Materiau d'emballage thermoscellable multicouche, emballage pour aliments fabrique au moyen de celui-ci et procede d'emballage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4513050A (en) * 1982-04-26 1985-04-23 Fuji Photo Film Co., Ltd. Material for packaging light-sensitive materials
US4521437A (en) * 1982-06-02 1985-06-04 Du Pont Canada Inc. Pouches of ethylene/octene-1 copolymer film containing a flowable material
US4576865A (en) * 1982-10-13 1986-03-18 Fuji Photo Film Co., Ltd. Materials for packaging light-sensitive materials
JPH06135439A (ja) * 1992-10-27 1994-05-17 Dainippon Printing Co Ltd 容 器
WO1997002948A1 (fr) * 1995-07-07 1997-01-30 Tetra Laval Holdings & Finance S.A. Feuille mince multicouche et sacs realises a l'aide de celle-ci
WO2001076976A1 (fr) * 2000-04-10 2001-10-18 Stora Enso Oyj Materiau d'emballage thermoscellable multicouche, emballage pour aliments fabrique au moyen de celui-ci et procede d'emballage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004074130A1 (fr) * 2003-02-21 2004-09-02 Stora Enso Oyj Emballage de pour produits sterilises thermoscelles, materiau d'emballage et emploi de ce materiau
US8592001B2 (en) 2003-02-21 2013-11-26 Stora Enso Oyj Method of making heat-sterilised product package
US9248622B2 (en) 2004-02-25 2016-02-02 Stora Enso Oyj Method for sealing a fiber-based material
WO2006073342A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Procede de fabrication d'un stratifie d'emballage fin et procede de formation d'un receptacle d'emballage
WO2006073341A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Stratifie d'emballage fin et receptacle d'emballage obtenu a partir de celui-ci
US8178180B2 (en) 2006-07-27 2012-05-15 Stora Enso Oyj Polymer-coated heat-sealable packaging material and a sealed package manufactured thereof
ITVA20090027A1 (it) * 2009-04-17 2010-10-18 Masterpack S P A Accoppiato di carta ed almeno due pellicole di plastica degradabile con barriera all'umidita' e all'ossigeno e sacchetti termosaldati di confezionamento
EP4137316A4 (fr) * 2020-03-25 2023-11-22 Lami Packaging (Kunshan) Co., Ltd Matériau d'emballage composite et son procédé de fabrication

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