WO1997002948A1 - Feuille mince multicouche et sacs realises a l'aide de celle-ci - Google Patents

Feuille mince multicouche et sacs realises a l'aide de celle-ci Download PDF

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Publication number
WO1997002948A1
WO1997002948A1 PCT/IB1996/000645 IB9600645W WO9702948A1 WO 1997002948 A1 WO1997002948 A1 WO 1997002948A1 IB 9600645 W IB9600645 W IB 9600645W WO 9702948 A1 WO9702948 A1 WO 9702948A1
Authority
WO
WIPO (PCT)
Prior art keywords
pigment
layer
film material
layers
sealing
Prior art date
Application number
PCT/IB1996/000645
Other languages
English (en)
Inventor
André CHIQUET
Original Assignee
Tetra Laval Holdings & Finance S.A.
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 Tetra Laval Holdings & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Priority to AU61346/96A priority Critical patent/AU6134696A/en
Publication of WO1997002948A1 publication Critical patent/WO1997002948A1/fr

Links

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
    • B32B27/18—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
    • B32B27/06—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
    • B32B27/08—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 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
    • B32B27/32—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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags
    • 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
    • B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks

Definitions

  • the transverse seams of the pouches are fin seams
  • the longitudinal seams if any, are either lap seams or fin seams according to the film material used and according to the machine used. If both surfaces of the material are heat sealable, lap or fin seams are possible, if the material is heat sealable only on its inside surface, only fin seams are possible.
  • the film material has to have a sufficient mechanical strength, determined by the application (size of pouch, characteristics of goods to be filled in) and a satisfactory compatibility with the goods to be packed (at least the inside surface of the pouch). Furthermore according to the application it may have to be able to keep air or other gases in or out (gas barrier), it may have to preserve aroma components of the goods to be packed (aroma barrier) or it may have to preserve light sensitive goods to be packed from being impaired by light (light barrier). Last but not least, the film material or at least its outside surface should look nice and/or should be able to be further decorated e.g. by printing.
  • pigments or other optically active particles are added to originally transparent materials rendering them opaque. Pigments may be added also for giving a specific colour to the film material.
  • the multilayer films are fabricated e.g. by coextrusion, lamination and/or coating.
  • pouches for milk are e.g. made from a two- layer film with an inside layer (light barrier) containing a black pigment and an outside layer (outside esthetic masking or colouring layer) containing e.g. a white pigment.
  • Such materials may also have a third layer covering the inside surface of the black layer and serving as an inside esthetic masking or colouring layer.
  • the polymer blend consists of a linear copolymer of ethylene and a C 6 - C 10 ⁇ - olefin to which is added a linear copolymer of ethylene and a C 4 - C 10 ⁇ - olefine and/or a high pressure polyethylene.
  • the sealing layer contains a white pigment (e.g. titanium dioxide) if inside masking of the black (barrier layer) is wished for.
  • the above mentioned publication names as a special advantage of a sealing layer made of the named polymer blend, that very good seam qualities can be achieved regardless whether the sealing layer contains a pigment or not (mentioned pigment concentrations 4, 8 and up to 15 parts by weight of titanium dioxide) whereas with a sealing layer made from a polymer blend of an ethylene/butene copolymer and a high pressure polyethylene seam qualities decrease considerably with pigment concentration (same range and same pigment).
  • WO93/02859 a further polymer blend for the sealing layer of a film material to be made into pouches is described. This material is basically a linear ultralow density polyethylene which is described as having a temperature range for sealing from 70 to 140°C and sealing characteristics independent from pigment concentration.
  • the object of the invention is to create a multilayer film material applicable for pouch fabrication which film material is to contain one pigment or several different pigments and therefore possesses light barrier properties and/or is coloured.
  • the film material is to show good sealability, the polymer materials used are to be easily available on the market.
  • the film material is to be producible with a process well introduced in the industry.
  • the object is achieved by the inventive multilayer film material which shows a pigment concentration gradient near its at least one surface (sealing surface), i.e. it shows a pigment concentration which is lower in a surface layer than in a layer below this surface layer.
  • the inventive film material contains at least two layers wherein the first layer (pigment layer) is thicker and contains a pigment or a pigment mixture in a concentration high enough for its function in the pouch (light barrier, colouring, masking) and the second layer (sealing layer) is thinner, constitutes the inner surface in the finished pouch and contains no pigment at all or of the same pigment a considerably lower concentration than the pigment layer.
  • sealing layers of widely known polymers such as polyethylene (homopolymer or copolymers such as e.g. low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE) or blends thereof) or of polypropylene (homopolymer or copolymers) which sealing layers have a thickness of at least 6 ⁇ m.
  • polymers well known as sealant materials such as e.g.
  • VLDPE very low density polyethylene
  • ULDPE ultra low density polyethylene
  • the inventive film material is preferably produced by coextrusion.
  • Figure 1 shows the cross section of a five-layer embodiment of the inventive film material which is applicable in particular for packing milk.
  • Figure 2 shows the cross section of a very simple two-layer embodiment of the inventive film material.
  • Figure 3 shows a pouch made from the inventive film material.
  • Figure 1 shows in cross section a five-layer film material as an exemplified embodiment of the inventive film material. This five-layer material is in particular applicable for packing milk.
  • the five layer film material contains a central light barrier layer 3 (inner pigment layer) containing preferably a black pigment, e.g. carbon black.
  • a black pigment e.g. carbon black.
  • it is masked on both sides with a masking layer 2 and 4 (outer pigment layers) containing a not black pigment, e.g. titanium dioxide with a concentration high enough to satisfactorily mask the blackness of the light barrier layer 3.
  • the film surface facing to the inside of the pouch shows as the innermost layer a thin sealing layer 1 containing no pigment or the same pigment as the inner masking layer but in a substantially smaller concentration.
  • the outermost layer 5 may be a sealing layer also and therefore contain the same pigment as the outer masking layer in a substantially smaller concentration or no pigment at all.
  • the advantage of such an outside sealing layer is not only that the variety of seams possible is increased, but also that there is no or at least less pigment deposition on the sealing jaws as there is when the masking layer 4 is the outermost layer. With less such deposition, sealing is easier controllable and the jaws need less maintenance.
  • an outermost layer 5 containing e.g. calcium carbonate or magnesia-calcium carbonate (dolomite) because such a layer is more favourable for printing than the masking layer 4, in particular if this one contains titanium oxide in a concentration higher than 10%.
  • Film material for pouches with 0.25 to 2 liters content has e.g. five layers all consisting of blends of LLDPE (linear low density ethylene/butene copolymer) and LDPE (low density homo-polyethylene) with the following ranges of thicknesses and polymer concentrations: sealing layer 1 : at least 6 ⁇ m and 0 - 5% TiO, masking layers 2 and 4 : 14 to 25 ⁇ m and 10 to 20% Ti0 2 , light barrier layer 3: 10 to 20 ⁇ m and 1 to 2,5% carbon black and outermost layer (printing layer) 5: at least 6 ⁇ m and 0 - 11% Ti0 2 and/or 5 to 40% of CaC0 3 .
  • LLDPE linear low density ethylene/butene copolymer
  • LDPE low density homo-polyethylene
  • Film material for stand-up pouches with e.g. four liters content has e.g. five layers, the middle one consisting of polypropylene (PP, homo- or copolymer), the outer ones of polyethylene (PE, homo- or copolymer) and inbetween layers of polymers, copolymers or blends thereof known as being applicable for adhesive layers between PP and PE layers (e.g.
  • FIG 3 shows an example of a pouch 6 made from the inventive material with a longitudinal seam 7 and two transverse seams 8.1 and 8.2.
  • the above description names pouch fabrication as application for the inventive material. This is not limitative. Obviously the inventive film material can be used for fabricating different packaging items by heat sealing.

Landscapes

  • Bag Frames (AREA)
  • Laminated Bodies (AREA)

Abstract

La feuille mince de l'invention est utile notamment dans la fabrication de sachets destinés à l'emballage de marchandises solides, en pâte, liquides, pouvant s'écouler ou susceptibles d'être pompées, et qui sont sensibles à la lumière. Ce matériau d'emballage possède par exemple cinq couches, parmi lesquelles les couches internes (2, 3, 4) ont pour fonction de constituer une barrière à la lumière et de colorer la feuille, et elles contiennent par exemple des pigments blancs, noirs, tandis qu'une des couches (1) superficielles servant de couche d'étanchéité ne contient pas de pigment ou une très faible concentration de pigment blanc, et l'autre couche superficielle (5), servant de couche d'impression, contient avantageusement du carbonate de calcium, lequel la rend tout à fait apte à l'impression.
PCT/IB1996/000645 1995-07-07 1996-07-04 Feuille mince multicouche et sacs realises a l'aide de celle-ci WO1997002948A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU61346/96A AU6134696A (en) 1995-07-07 1996-07-04 Multilayer film material and pouches made from the material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH198695 1995-07-07
CH1986/95-9 1995-07-07

Publications (1)

Publication Number Publication Date
WO1997002948A1 true WO1997002948A1 (fr) 1997-01-30

Family

ID=4223238

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1996/000645 WO1997002948A1 (fr) 1995-07-07 1996-07-04 Feuille mince multicouche et sacs realises a l'aide de celle-ci

Country Status (2)

Country Link
AU (1) AU6134696A (fr)
WO (1) WO1997002948A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1090746A2 (fr) * 1999-10-07 2001-04-11 SIG Pack Systems AG Feuille multicouche plastique
US6231293B1 (en) 1996-12-09 2001-05-15 Mannesmann Aktiengesellschaft Tipping device for emptying containers for piece goods
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
WO2002026494A2 (fr) * 2000-09-26 2002-04-04 Elopak Systems Ag Ameliorations relatives a des films
WO2003080335A1 (fr) * 2002-03-23 2003-10-02 Tesa Ag Film de transfert par laser a plusieurs couches pour le marquage durable de pieces
WO2004007195A1 (fr) * 2002-07-11 2004-01-22 Stora Enso Oyj Materiau d'emballage thermoscellable et emballage pour produit ferme fabrique a partir dudit materiau
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
WO2006073343A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Stratifie d'emballage fin et receptacle d'emballage forme a partir de celui-ci
WO2008094084A1 (fr) * 2007-01-29 2008-08-07 Tetra Laval Holdings & Finance S.A. Stratifié d'emballage et son procédé de fabrication du stratifié d'emballage
EP2357277A1 (fr) * 2010-02-12 2011-08-17 Rhodia Acetow GmbH Papier photodégradable et son utilisation
RU2466919C2 (ru) * 2010-05-20 2012-11-20 Общество с ограниченной ответственностью "Липецкий офсетный комбинат" (ООО "ЛИОКОМ") Комбинированный упаковочный материал
DE102007054579B4 (de) * 2007-11-15 2013-03-21 Lisa Dräxlmaier GmbH Klavierlackoptik durch Folieneinsatz

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1391446A (en) * 1971-08-02 1975-04-23 Ici Ltd Anti-dust sheets
GB2026942A (en) * 1978-07-28 1980-02-13 Fuji Photo Film Co Ltd Laminate of films of stretched polyethylene
EP0143567A2 (fr) * 1983-11-23 1985-06-05 COURTAULDS FILMS & PACKAGING (HOLDINGS) LTD. Films d'emballage décoratifs
EP0338402A2 (fr) * 1988-04-14 1989-10-25 Idemitsu Petrochemical Co. Ltd. Matériaux et articles stratifiés
EP0517109A2 (fr) * 1991-06-06 1992-12-09 Hoechst Aktiengesellschaft Film blanc scellable en polyoléfines
WO1993002859A1 (fr) * 1991-08-09 1993-02-18 The Dow Chemical Company Poche de conditionnement de matieres liquides
EP0545649A1 (fr) * 1991-12-03 1993-06-09 Courtaulds Films (Holdings) Limited Films polymères
EP0605130A1 (fr) * 1992-12-29 1994-07-06 Imperial Chemical Industries Plc Feuille de polymère

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1391446A (en) * 1971-08-02 1975-04-23 Ici Ltd Anti-dust sheets
GB2026942A (en) * 1978-07-28 1980-02-13 Fuji Photo Film Co Ltd Laminate of films of stretched polyethylene
EP0143567A2 (fr) * 1983-11-23 1985-06-05 COURTAULDS FILMS & PACKAGING (HOLDINGS) LTD. Films d'emballage décoratifs
EP0338402A2 (fr) * 1988-04-14 1989-10-25 Idemitsu Petrochemical Co. Ltd. Matériaux et articles stratifiés
EP0517109A2 (fr) * 1991-06-06 1992-12-09 Hoechst Aktiengesellschaft Film blanc scellable en polyoléfines
WO1993002859A1 (fr) * 1991-08-09 1993-02-18 The Dow Chemical Company Poche de conditionnement de matieres liquides
EP0545649A1 (fr) * 1991-12-03 1993-06-09 Courtaulds Films (Holdings) Limited Films polymères
EP0605130A1 (fr) * 1992-12-29 1994-07-06 Imperial Chemical Industries Plc Feuille de polymère

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6231293B1 (en) 1996-12-09 2001-05-15 Mannesmann Aktiengesellschaft Tipping device for emptying containers for piece goods
EP1090746A2 (fr) * 1999-10-07 2001-04-11 SIG Pack Systems AG Feuille multicouche plastique
EP1090746A3 (fr) * 1999-10-07 2001-11-07 SIG Pack Systems AG Feuille multicouche plastique
US6346323B1 (en) 1999-10-07 2002-02-12 Sig Pack Systems Ag Multi-layer synthetic film
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
US7329460B2 (en) 2000-04-10 2008-02-12 Stora Enso Oyj Aluminum-colored multilayer heat-sealable packaging material
WO2002026494A3 (fr) * 2000-09-26 2002-08-22 Elopak Systems Ameliorations relatives a des films
WO2002026494A2 (fr) * 2000-09-26 2002-04-04 Elopak Systems Ag Ameliorations relatives a des films
WO2003080335A1 (fr) * 2002-03-23 2003-10-02 Tesa Ag Film de transfert par laser a plusieurs couches pour le marquage durable de pieces
US7311954B2 (en) 2002-03-23 2007-12-25 Tesa Ag Multi-layer laser transfer film for the permanent labeling of components
WO2004007195A1 (fr) * 2002-07-11 2004-01-22 Stora Enso Oyj Materiau d'emballage thermoscellable et emballage pour produit ferme fabrique a partir dudit materiau
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
WO2006073343A1 (fr) * 2005-01-03 2006-07-13 Tetra Laval Holdings & Finance S.A. Stratifie d'emballage fin et receptacle d'emballage forme a partir de celui-ci
CN101595044A (zh) * 2007-01-29 2009-12-02 利乐拉瓦尔集团及财务有限公司 包装层压板及其制造方法
RU2445247C2 (ru) * 2007-01-29 2012-03-20 Тетра Лаваль Холдингз Энд Файнэнс С.А. Упаковочный ламинат и способ его получения
CN101595044B (zh) * 2007-01-29 2012-11-14 利乐拉瓦尔集团及财务有限公司 包装层压板及其制造方法
WO2008094084A1 (fr) * 2007-01-29 2008-08-07 Tetra Laval Holdings & Finance S.A. Stratifié d'emballage et son procédé de fabrication du stratifié d'emballage
DE102007054579B4 (de) * 2007-11-15 2013-03-21 Lisa Dräxlmaier GmbH Klavierlackoptik durch Folieneinsatz
EP2357277A1 (fr) * 2010-02-12 2011-08-17 Rhodia Acetow GmbH Papier photodégradable et son utilisation
WO2011098510A1 (fr) * 2010-02-12 2011-08-18 Rhodia Acetow Gmbh Papier photodégradable et son utilisation
US8986502B2 (en) 2010-02-12 2015-03-24 Solvay Acetow Gmbh Photodegradable paper and its use
RU2466919C2 (ru) * 2010-05-20 2012-11-20 Общество с ограниченной ответственностью "Липецкий офсетный комбинат" (ООО "ЛИОКОМ") Комбинированный упаковочный материал

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