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WO2003004268A1 - Utilisation d'une pellicule de conditionnement multicouche pour l'emballage, pellicule de conditionnement multicouche et emballage pouvant etre ferme par torsion - Google Patents

Utilisation d'une pellicule de conditionnement multicouche pour l'emballage, pellicule de conditionnement multicouche et emballage pouvant etre ferme par torsion Download PDF

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Publication number
WO2003004268A1
WO2003004268A1 PCT/IT2002/000431 IT0200431W WO03004268A1 WO 2003004268 A1 WO2003004268 A1 WO 2003004268A1 IT 0200431 W IT0200431 W IT 0200431W WO 03004268 A1 WO03004268 A1 WO 03004268A1
Authority
WO
WIPO (PCT)
Prior art keywords
layers
film material
layer
material according
central layer
Prior art date
Application number
PCT/IT2002/000431
Other languages
English (en)
Inventor
Lorenzo Pezzetti Martinetto
Original Assignee
Nova-Plast S.R.L.
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 Nova-Plast S.R.L. filed Critical Nova-Plast S.R.L.
Publication of WO2003004268A1 publication Critical patent/WO2003004268A1/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
    • B32B27/32—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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (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
    • B32B27/36—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
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2307/51—Elastic
    • 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
    • B32B2323/043—HDPE, i.e. high 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
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • 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
    • B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
    • 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
    • B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
    • 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

  • This invention relates to the use of multilayer film material to produce wrappers, especially of food products.
  • some food products such as sweets, for example, are packaged in a wrapper constituted by a film of plastic material, usually transparent or semi-transparent, which is closed by imparting a twist to the film.
  • the purpose of the invention is to produce packaging for products, especially food products, by using a film wrapper capable of properly retaining the twist which is imparted to it to close the packaging.
  • Another purpose of the invention is to produce a multilayer film wrapper capable of being printed on or metallized on at least one of its outer surfaces without compromising the mechanical characteristics mentioned above.
  • numeral 10 indicates a multilayer film material in which five layers can be distinguished: a central or inner core layer 11, two opposite intermediate layers 12 and 13, and two outer layers 14, 15.
  • the inner layer 11 is essentially polyethylene-based or polypropylene-based, while the two intermediate layers 12, 13 are essentially polystyrene-based and the outer covering layers 14, 15 are essentially MLDPE polyethylene-based.
  • the inner layer 11 and the outer layers 14, 15, polyethylene- based can be produced as a composition comprising low- density polyethylene with high-density polyethylene, and preferably comprise metallocene polyethylene, for example the metallocene polyethylene available under the trade names Exxon ML 1018 or 18Pfax Basel.
  • the metallocene polyethylene is present at a concentration of about 90% by weight relative to the total weight of the inner layer.
  • the metallocene polyethylene (MLDPE) is present at a concentration of about 90% by weight.
  • the intermediate layers 12 , 13 are instead preferably produced as a composition comprising basic polystyrene mixed with modified polystyrene such as for example the copolymer of styrene-butadiene marketed by Phillips Chemical Company under the trade name K-Resin®.
  • each intermediate layer in turn comprises two layers :
  • modified polystyrene such as for example the copolymer of styrene- butadiene available commercially under the trade name K- Resin® .
  • the central core layer 11 besides performing the function of a bonding agent for the two intermediate layers 12 , 13 , utilizes the elastic properties of polyethylene or polypropylene to give the multilayer film as a whole good properties of flexibility and of resistance to local deformation, in particular when caused by twisting, without allowing the formation of cracks or discontinuities which might allow the ingress to the inside of a package of external contaminating agents such as water, dust, dirt etc.
  • the intermediate layers 12, 13, intimately bonded by means of the central layer 11, are instead more inclined, compared with the latter, to undergo permanent plastic deformation, in particular when twisting is imparted to the multilayer material .
  • the outer covering layers 14, 15 are those which receive the printing inks which are applied to the multilayer film material to obtain images and/or lettering as required for the intended end use.
  • the multilayer film material of the invention can therefore advantageously be printed on even with any ink normally used for printing on polypropylene, and does not necessarily require the use of water-based inks (which do not attack polystyrene) .
  • only one outer covering layer 14 is provided, suitable for printing on and having the characteristics mentioned above with reference to the examples of embodiment already described.
  • the single outer covering layer 14 or the two outer covering layers 14, 15 may be produced from PET (polyethylene terephthalate) or PETG (polyethylene terephthalate glycol modified, or amorphous terephtalic acid polyester) joined to the intermediate layer 12, 13 by means of an adhesive 16.
  • the invention can, in particular, be used for wrapping food products in general and/or products of other kinds which it is wished to package by means of a film wrapper which is closed by maintaining the twist which is imparted to it.
  • the mechanical characteristic of the multilayer film depends upon its thickness; however, even using films with a total thickness of about 20 microns, excellent toughness properties were obtained.
  • the total thickness of the film should generally be between about 20 and about 50 microns.
  • the percentages of thickness of the various layers constituting the film are divided uniformly.
  • the intermediate layers, essentially polystyrene-based each to have a thickness of between about 20% and 40% of the total thickness of the film, while the central layer, polyethylene-based, should have a thickness of between 20% and 60% of the total thickness.
  • polystyrene-based intermediate layers 12, 13 there are interposed two respective layers 17, 18 which are based on PETG or PET with an addition of modified polystyrene, preferably SBS (styrene-butadiene-styrene) .
  • SBS styrene-butadiene-styrene
  • the layers 17 and 18 are arranged externally relative to the intermediate layers 12 and 13, that is to say between the latter and the outer covering layers 14, 15 respectively.
  • Particularly advantageous results are obtained if the layers 11, 14 and 15, with more elastic properties, constitute as a whole 35-40% of the total thickness of the multilayer film, and layers 12, 13, 17, 18, with more plastic properties, constitute the remaining 60-

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Laminated Bodies (AREA)
  • Wrappers (AREA)

Abstract

Selon la présente invention, pour produire des emballages, notamment pour des produits alimentaires, on utilise une pellicule de conditionnement multicouche, laquelle est fermée par torsion. Le matériau multicouche présente: une couche centrale (11) de matière plastique à base de polyéthylène ou de polypropylène; deux couches opposées (12, 13) d'une matière plastique à base de polystyrène disposée sur les faces opposées de la couche centrale (11); au moins une couche de revêtement extérieure (14, 15) recouvrant au moins l'une des deux couches opposées (12, 13) et recevant l'encre d'impression. Ladite couche de revêtement est produite à partir d'une matière plastique choisie dans le groupe comprenant polyéthylène, polypropylène, PET, PETG.
PCT/IT2002/000431 2001-07-04 2002-07-01 Utilisation d'une pellicule de conditionnement multicouche pour l'emballage, pellicule de conditionnement multicouche et emballage pouvant etre ferme par torsion WO2003004268A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2001A000647 2001-07-04
IT2001TO000647A ITTO20010647A1 (it) 2001-07-04 2001-07-04 Impiego di un materiale pellicolare multistrato per realizzare involucri.

Publications (1)

Publication Number Publication Date
WO2003004268A1 true WO2003004268A1 (fr) 2003-01-16

Family

ID=11459017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2002/000431 WO2003004268A1 (fr) 2001-07-04 2002-07-01 Utilisation d'une pellicule de conditionnement multicouche pour l'emballage, pellicule de conditionnement multicouche et emballage pouvant etre ferme par torsion

Country Status (2)

Country Link
IT (1) ITTO20010647A1 (fr)
WO (1) WO2003004268A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103429435A (zh) * 2011-03-31 2013-12-04 Dic株式会社 喷墨记录介质、印刷物、它们的制造方法及包装材料
WO2014053383A1 (fr) * 2012-10-05 2014-04-10 Unilever N.V. Nouveau film stratifié pour emballage
CN106081344A (zh) * 2016-06-20 2016-11-09 广东宝佳利彩印实业有限公司 一种含酱油塑料容器不胀包封合盖膜的制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022281A1 (fr) * 1996-11-18 1998-05-28 Teich Aktiengesellschaft Emballage torsade
WO1999038685A1 (fr) * 1998-01-29 1999-08-05 Soplaril S.A. Film pour l'enveloppement d'objets

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998022281A1 (fr) * 1996-11-18 1998-05-28 Teich Aktiengesellschaft Emballage torsade
WO1999038685A1 (fr) * 1998-01-29 1999-08-05 Soplaril S.A. Film pour l'enveloppement d'objets

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103429435A (zh) * 2011-03-31 2013-12-04 Dic株式会社 喷墨记录介质、印刷物、它们的制造方法及包装材料
US9017779B2 (en) 2011-03-31 2015-04-28 Dic Corporation Inkjet recording medium, printed material, method for producing same, and package
WO2014053383A1 (fr) * 2012-10-05 2014-04-10 Unilever N.V. Nouveau film stratifié pour emballage
US20150232246A1 (en) * 2012-10-05 2015-08-20 Conopco, Inc., D/B/A Unilever Novel laminated film for packaging
US10046395B2 (en) 2012-10-05 2018-08-14 Conopco, Inc. Laminated film for packaging
CN106081344A (zh) * 2016-06-20 2016-11-09 广东宝佳利彩印实业有限公司 一种含酱油塑料容器不胀包封合盖膜的制备方法

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