WO2004014645A1 - Sterilisable sealing film comprising a barrier layer - Google Patents

Sterilisable sealing film comprising a barrier layer Download PDF

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Publication number
WO2004014645A1
WO2004014645A1 PCT/EP2003/008018 EP0308018W WO2004014645A1 WO 2004014645 A1 WO2004014645 A1 WO 2004014645A1 EP 0308018 W EP0308018 W EP 0308018W WO 2004014645 A1 WO2004014645 A1 WO 2004014645A1
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WO
WIPO (PCT)
Prior art keywords
layer
sealing film
barrier layer
film according
sterilizable
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PCT/EP2003/008018
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German (de)
French (fr)
Inventor
Günter Schubert
Guy Boiron
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Alcan Deutschland Holdings Gmbh
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Publication date
Application filed by Alcan Deutschland Holdings Gmbh filed Critical Alcan Deutschland Holdings Gmbh
Priority to EP03784043A priority Critical patent/EP1525089A1/en
Priority to AU2003254569A priority patent/AU2003254569A1/en
Publication of WO2004014645A1 publication Critical patent/WO2004014645A1/en

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    • 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
    • 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/55—Liquid crystals
    • 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
    • B32B2307/704—Crystalline
    • 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
    • B32B2369/00—Polycarbonates
    • 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

Definitions

  • the invention relates to a sterilizable sealing film with a substrate, a primer layer and at least one extruded function layer.
  • Sterilizable sealing foils the substrates of which consist, for example, of aluminum, plastic or paper, generally have a primer layer as a primer for extrusion coatings.
  • the functional layers applied by extrusion are, for example, welding, sealing and / or peeling layers.
  • sterilizable, peelable (extrusion) coatings especially lids for polypropylene shells or shells with polypropylene on the inside, are only partially resistant to filling material components. This can manifest itself in inadequate seal seam strength, inadequate peel resistance when opening, pellicle or thread formation when opening the container or in delamination of partial layers or the complete coating. This failure occurs due to migration of filling material components into the layers of the mostly coextruded extrudate and weakening of these layers at interfaces with one another or cohesive weakening of individual or all layers, especially during heat treatments, such as, for example Pasteurize or sterilize. Adhesion layers adjacent to aluminum as the substrate are particularly sensitive when in particular fat components (essentially triglycerides and fatty acids) are absorbed.
  • the adhesion-promoting interface can be protected in a complex manner, for example by polyimide, or epoxy coating or chemical conversion treatment of the aluminum.
  • this treatment is ineffective in the case of cohesive failure of the adhesion promoter or adhesive failure at the interface with the coating / primer or pretreatment.
  • heat seal lacquers based on VC polymers, acrylates, epoxy resins consisting of PVC polymers or acrylates generally have a good barrier effect for filling components such as water, lactic acid, acetic acid and salt, so that these filling components, which adhere to substrates such as Al -Foil can adversely affect the surface of the aluminum.
  • extrusion coatings made of ethylene or polypropylene (co) polymers or mixtures offer only moderate protection against such filling material components, so that greater attention needs to be paid to the adhesion and the filling material resistance, especially at elevated temperatures.
  • the present invention is based on the object of providing a sterilizable sealing film in which migration of components of the Filling material within the film is reduced or avoided entirely.
  • the previously derived and demonstrated object is achieved in that an extruded barrier layer is provided between the primer layer and the extruded functional layer to prevent the migration of components of the filling material.
  • the arrangement of such a barrier layer between the primer layer and the functional layer ensures that the composite is free of migratory substances, thereby providing an easy-to-manufacture, sterilizable sealing film which, in particular, ensures the safe use of adhesive and easy-to-use, inexpensive, but not yet usable due to lack of filling material resistance Primer systems enabled.
  • This sterilizable sealing film requires, for example, shorter or no necessary curing times and / or has a higher product safety.
  • a major advance in the sterilizable sealing film according to the invention is that the adhesion-promoting polymer, the primer, is protected against absorption and migration of, in particular, fat components to the interface with the aluminum or the substrate.
  • a barrier layer provided in accordance with the invention protects both adhesive interfaces and the adhesive agent via its thickness from excessive absorption or enrichment with migratory material, particularly during sterilization and also during storage of the container after sterilization. Because the barrier layer according to a first embodiment has good adhesive properties on the primer layer, the layer system according to the invention can be constructed very simply.
  • an adhesive agent layer and / or a compatibility agent layer is advantageously provided between the primer layer and the barrier layer in order to produce the adhesive properties.
  • a compatibility mediator layer is provided between the barrier layer and the functional layer significantly expands the spectrum of the materials that can be used for the barrier layer.
  • the barrier layer, the adhesive layer and / or the compatibility agent layer are coextruded with the 'functional layer, the extrusion coating is ensured in a single step.
  • the barrier plastic for producing the barrier layer provided according to the invention is targeted according to the migratable components of the layers or the filling material to be expected and, with regard to the sterilization process, its temperature resistance select.
  • Particularly suitable polymers for the barrier layer provided according to the invention are polyamide, modified polyamide, polyamide 6, amorphous or crystalline polycarbonate, polyester, liquid-crystalline polymers, polyolefins, filled polymers or, for example, polyolefins which crosslink under the influence of temperature and moisture.
  • Suitable filling components for the filled polymers are, for example, mica, talc or so-called nanoparticles.
  • the crosslinking of the polyolefins, for example under the influence of temperature and moisture, can be produced in particular by silane.
  • the peel resistance of the sterilizable sealing film can be determined by the additive content, the heat treatment temperature and time , especially the sterilization temperature and time.
  • the weakening can be done specifically by the components on the product side of the packaging.
  • the embodiment shown in the single figure of a sterilizable sealing film 1 according to the invention has a substrate 2 made of aluminum in the embodiment shown.
  • This substrate 2 is provided with a primer layer 3 as a primer for the extrusion coating.
  • an extrusion coating was carried out by coextruding a barrier layer 4 provided according to the invention, a compatibility agent layer 5 and a functional layer 6.
  • an adhesion promoter layer can also be used between these two layers, which is preferably coextruded together with the barrier layer 4, the compatibility promoter layer 5 and the functional layer 6.
  • a side effect of the arrangement according to the invention of a barrier layer 4 between the primer layer 3 and the functional layer 6 is that, under certain circumstances, expensive functional layers, consisting for example of peel mixtures, can be replaced by the relatively inexpensive barrier material.
  • the use of two or more functional layers instead of, as shown, a functional layer 6 is possible in order to adapt the sterilizable sealing film 1 according to the invention to your intended use.

Abstract

The invention relates to a sterilisable sealing film comprising a substrate (2), a primer layer (3), and at least one extruded functional layer (6). The aim of the invention is to improve one such sterilisable sealing film in terms of the migration freedom of constituents thereof. To this end, an extruded barrier layer (4) preventing at least the migration of constituents of the filler is provided between the primer layer (3) and the extruded functional layer (6).

Description

Sterilisierbare Siegelfolie mit Barriereschicht Sterilizable sealing film with a barrier layer
Die Erfindung betrifft eine sterilisierbare Siegelfolie mit einem Substrat, einer Primerschicht und mindestens einer extrudierten Fun tionsschicht .The invention relates to a sterilizable sealing film with a substrate, a primer layer and at least one extruded function layer.
Sterilisierbare Siegelfolien, deren Substrat beispielsweise aus Aluminium, Kunststoff oder Papier bestehen, weisen in der Regel eine Primerschicht als Haftgrund für Extrusionsbeschichtungen auf . Bei den durch Extrusion aufgetragenen Funktionsschichten handelt es sich beispielsweise um Verschweiß-, Siegel- und/oder Peelschichten.Sterilizable sealing foils, the substrates of which consist, for example, of aluminum, plastic or paper, generally have a primer layer as a primer for extrusion coatings. The functional layers applied by extrusion are, for example, welding, sealing and / or peeling layers.
Beispielsweise sterilisierfähige, peelfähige (Extrusions) -Beschichtungen, insbesondere Deckel für Polypropylenschalen oder Schalen mit Polypropylen auf der Innenseite, sind nur bedingt beständig gegen Füllgutkomponenten. Dies kann sich in mangelhafter Siegelnahtfestigkeit, dem mangelhaften Schälwiderstand beim Öffnen, Häutchen- oder Fädchenbildung beim Öffnen der Behälter oder in einer Delamination von Teilschichten oder der kompletten Beschichtung äußern. Dieses Versagen kommt durch Migration von Füllgutkomponenten in die Schichten des meistens coextrudierten Extrudats und Schwächung dieser Schichten an Grenzflächen untereinander oder kohäsive Schwächung einzelner oder aller Schichten, besonders während Wärmebehandlungen, wie z.B. Pasteurisieren oder Sterilisieren, zustande. Besonders empfindlich verhalten sich zu Aluminium als Substrat benachbart liegende Haftvermittlerschichten bei der Aufnahme von insbesondere Fettkomponenten (im wesentlichen Triglyceride und Fettsäuren) . Die haftvermittelnde Grenzfläche kann aufwendig, zum Beispiel durch Polyimid, oder Epoxilackierung oder chemische Konversionsbehandlung des Aluminiums, geschützt werden. Diese Behandlung ist allerdings in dem Fall kohäsiven Versagens des Haftvermittlers oder adhäsiven Versagens an der Grenzfläche zur Lackierung/Grundierung oder Vorbehandlung wirkungslos.For example, sterilizable, peelable (extrusion) coatings, especially lids for polypropylene shells or shells with polypropylene on the inside, are only partially resistant to filling material components. This can manifest itself in inadequate seal seam strength, inadequate peel resistance when opening, pellicle or thread formation when opening the container or in delamination of partial layers or the complete coating. This failure occurs due to migration of filling material components into the layers of the mostly coextruded extrudate and weakening of these layers at interfaces with one another or cohesive weakening of individual or all layers, especially during heat treatments, such as, for example Pasteurize or sterilize. Adhesion layers adjacent to aluminum as the substrate are particularly sensitive when in particular fat components (essentially triglycerides and fatty acids) are absorbed. The adhesion-promoting interface can be protected in a complex manner, for example by polyimide, or epoxy coating or chemical conversion treatment of the aluminum. However, this treatment is ineffective in the case of cohesive failure of the adhesion promoter or adhesive failure at the interface with the coating / primer or pretreatment.
Daneben weisen Heißsiegellacke, auf Basis von VC- Polymerisaten, Acrylaten, Epoxiharzen bestehend aus PVC- Polymerisaten oder Acrylaten in der Regel eine gute Barrierewirkung für Füllgutbestandteile wie Wasser, Milchsäure, Essigsäure und Salz auf, sodass diese Füllgutbestandteile, die die Haftung zu Substraten wie AI-Folie beeinträchtigen können, praktisch nicht an die Oberfläche des Aluminiums gelangen. Demgegenüber bieten Extrusionsbeschichtungen aus Ethylen- oder Polypropylen- (co) -polymerisaten oder Mischungen nur einen mäßigen Schutz gegen solche Füllgutbestandteile, so dass der Haftung und der Füllgutbeständigkeit größere Aufmerksamkeit, insbesondere bei erhöhter Temperatur, geschenkt werden muss .In addition, heat seal lacquers based on VC polymers, acrylates, epoxy resins consisting of PVC polymers or acrylates generally have a good barrier effect for filling components such as water, lactic acid, acetic acid and salt, so that these filling components, which adhere to substrates such as Al -Foil can adversely affect the surface of the aluminum. In contrast, extrusion coatings made of ethylene or polypropylene (co) polymers or mixtures offer only moderate protection against such filling material components, so that greater attention needs to be paid to the adhesion and the filling material resistance, especially at elevated temperatures.
Ausgehend von dem zuvor beschriebenen Stand der Technik liegt der vorliegenden Erfindung die Aufgabe zu Grunde, eine sterilisierbare Siegelfolie zur Verfügung zu stellen, bei der eine Migration von Bestandteilen des Füllgutes innerhalb der Folie reduziert oder gänzlich vermieden wird.Starting from the prior art described above, the present invention is based on the object of providing a sterilizable sealing film in which migration of components of the Filling material within the film is reduced or avoided entirely.
Erfindungsgemäß ist die zuvor hergeleitete und aufgezeigte Aufgabe dadurch gelöst, dass zwischen der Primerschicht und der extrudierten FunktionsSchicht eine die Migration von Bestandteilen des Füllgutes verhindernde, extrudierte Barriereschicht vorgesehen ist.According to the invention, the previously derived and demonstrated object is achieved in that an extruded barrier layer is provided between the primer layer and the extruded functional layer to prevent the migration of components of the filling material.
Durch die Anordnung einer derartigen Barriereschicht zwischen der Primerschicht und der FunktionsSchicht wird die Migratfreiheit des Verbundes gewährleistet, wodurch eine einfach herzustellende sterilisierbare Siegelfolie zur Verfügung gestellt wird, die insbesondere die sichere Verwendung guthaftender und leicht zu verarbeitender, kostengünstiger, jedoch wegen mangelnder Füllgutbeständigkeit bislang nicht einsetzbarer Primersysteme ermöglicht. Diese sterilisierbare Siegelfolie erfordert beispielsweise kürzere oder gar keine notwendigen Aushärtezeiten und/oder weist eine höhere ProduktSicherheit auf. Ein wesentlicher Fortschritt liegt bei der erfindungsgemäßen sterilisierbaren Siegelfolie darin, dass das haftvermittelnde Polymer, der Primer, vor Aufnahme und Migrationen von insbesondere Fettbestandteilen an die Grenzfläche zum Aluminium bzw. zum Substrat geschützt wird. Durch die Anordnung einer erfindungsgemäß vorgesehenen Barriereschicht werden sowohl haftende Grenzflächen als auch der Haftvermittler über seine Stärke vor übermäßiger Aufnahme oder Anreicherung mit Migrat besonders während der Sterilisation und auch während der Lagerung des Behälters nach der Sterilisation geschützt . Dadurch, dass die Barriereschicht gemäß einer ersten Ausgestaltung gute Hafteigenschaften auf der Primerschicht aufweist, kann das erfindungsgemäße Schichtsystem sehr einfach aufgebaut werden.The arrangement of such a barrier layer between the primer layer and the functional layer ensures that the composite is free of migratory substances, thereby providing an easy-to-manufacture, sterilizable sealing film which, in particular, ensures the safe use of adhesive and easy-to-use, inexpensive, but not yet usable due to lack of filling material resistance Primer systems enabled. This sterilizable sealing film requires, for example, shorter or no necessary curing times and / or has a higher product safety. A major advance in the sterilizable sealing film according to the invention is that the adhesion-promoting polymer, the primer, is protected against absorption and migration of, in particular, fat components to the interface with the aluminum or the substrate. The arrangement of a barrier layer provided in accordance with the invention protects both adhesive interfaces and the adhesive agent via its thickness from excessive absorption or enrichment with migratory material, particularly during sterilization and also during storage of the container after sterilization. Because the barrier layer according to a first embodiment has good adhesive properties on the primer layer, the layer system according to the invention can be constructed very simply.
Können die Hafteigenschaften der Barriereschicht auf der Primerschicht nicht ohne weiteres mit der Barrierewirkung vereinbart werden, so ist zur Herstellung der Hafteigenschaften vorteilhafterweise zwischen der Primerschicht und der Barriereschicht eine Haftvermittlerschicht und/oder eine Verträglichkeitsvermittlerschicht vorgesehe .If the adhesive properties of the barrier layer on the primer layer cannot be readily agreed with the barrier effect, an adhesive agent layer and / or a compatibility agent layer is advantageously provided between the primer layer and the barrier layer in order to produce the adhesive properties.
Dadurch, dass zwischen der Barriereschicht und der Funktionsschicht eine Verträglichkeitsvermittlerschicht vorgesehen ist, wird das Spektrum der für die Barriereschicht einsetzbaren Materialien deutlich erweitert .The fact that a compatibility mediator layer is provided between the barrier layer and the functional layer significantly expands the spectrum of the materials that can be used for the barrier layer.
Dadurch, dass gemäß einer vorteilhaften Ausgestaltungen der Erfindung die Barriereschicht, die Haftvermittlerschicht und/oder die Verträglichkeitsvermittlerschicht mit der ' Funktionsschicht coextrudiert sind, ist die Extrusionsbeschichtung in einem Arbeitsschritt sichergestellt .In that according to an advantageous embodiments of the invention, the barrier layer, the adhesive layer and / or the compatibility agent layer are coextruded with the 'functional layer, the extrusion coating is ensured in a single step.
Der Barrierekunststoff zur Herstellung der erfindungsgemäß vorgesehenen Barriereschicht ist gezielt nach den zu erwartenden migrierfähigen Bestandteilen der Schichten bzw. des Füllgutes und, im Hinblick auf den Sterilisationsprozess, seiner Temperaturbeständigkeit auszuwählen. Als Polymere für die erfindungsgemäß vorgesehene Barriereschicht eignen sich insbesondere Polyamid, modifiziertes Polyamid, Polyamid 6, amorphes oder kristallines Polycarbonat , Polyester, flüssigkristalline Polymere, Polyolefine, gefüllte Polymere oder beispielsweise unter Temperatur- und Feuchteinfluss vernetzende Polyolefine. Als Füllbestandteile für die gefüllten Polymere eignen sich beispielsweise Glimmer, Talkum oder sogenannte Nanopartikel . Die Vernetzung der Polyolefine beispielsweise unter Temperatur- und Feuchteinfluss kann insbesondere durch Silan hergestellt werden.The barrier plastic for producing the barrier layer provided according to the invention is targeted according to the migratable components of the layers or the filling material to be expected and, with regard to the sterilization process, its temperature resistance select. Particularly suitable polymers for the barrier layer provided according to the invention are polyamide, modified polyamide, polyamide 6, amorphous or crystalline polycarbonate, polyester, liquid-crystalline polymers, polyolefins, filled polymers or, for example, polyolefins which crosslink under the influence of temperature and moisture. Suitable filling components for the filled polymers are, for example, mica, talc or so-called nanoparticles. The crosslinking of the polyolefins, for example under the influence of temperature and moisture, can be produced in particular by silane.
Dadurch, dass die Barriereschicht und/oder benachbarte Schichten zumindest teilweise aus einem Blend mit einem auf Füllbestandteile oder Wärmebehandlungen reagierenden Polymeradditiv besteht und diese Schicht mittelbar oder unmittelbar benachbarte Schichten kohäsiv schwächt, lassen sich die Schälwiderstände der sterilisierbaren Siegelfolie durch den Additivgehalt, die Wärmebehandlungstemperatur und Zeit, insbesondere die Sterilisationstemperatur und -zeit einstellen. Die Schwächung kann dabei gezielt durch den Komponenten von der Füllgutseite der Verpackung erfolgen. - ■ Characterized in that the barrier layer and / or adjacent layers at least partially consists of a blend with a polymer additive reacting to filler components or heat treatments and this layer indirectly or directly weakens adjacent layers, the peel resistance of the sterilizable sealing film can be determined by the additive content, the heat treatment temperature and time , especially the sterilization temperature and time. The weakening can be done specifically by the components on the product side of the packaging. - ■
Es existieren nun eine Vielzahl von Möglichkeiten, die erfindungsgemäße sterilisierbare Siegelfolie auszugestalten und weiterzubilden. Hierzu wird beispielsweise verwiesen einerseits auf die dem Patentanspruch 1 nachgeordneten Patentansprüche andererseits auf die Beschreibung eines bevorzugten Ausführungsbeispiels in Verbindung mit der Zeichnung. In der Zeichnung zeigt die einzige Figur einen Schnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen sterilisierbaren Siegelfolie.There are now a large number of possibilities for designing and developing the sterilizable sealing film according to the invention. For this purpose, reference is made, on the one hand, to the claims subordinate to claim 1, on the other hand, to the description of a preferred exemplary embodiment in conjunction with the drawing. In the drawing, the single figure shows a section through an embodiment of a sterilizable sealing film according to the invention.
Das in der einzigen Figur dargestellte Ausführungsbeispiel einer erfindungsgemäßen sterilisierbaren Siegelfolie 1 weist ein im dargestellten Ausführungsbeispiel aus Aluminium bestehendes Substrat 2 auf. Dieses Substrat 2 ist mit einer Primerschicht 3 als Haftgrund für die Extrusionsbeschichtung versehen.The embodiment shown in the single figure of a sterilizable sealing film 1 according to the invention has a substrate 2 made of aluminum in the embodiment shown. This substrate 2 is provided with a primer layer 3 as a primer for the extrusion coating.
Bei dem dargestellten Ausführungsbeispiel erfolgte eine Extrusionsbeschichtung durch die Coextrusion einer erfindungsgemäß vorgesehenen Barriereschicht 4, einer Verträglichkeitsvermittlerschicht 5 und einer FunktionsSchicht 6.In the exemplary embodiment shown, an extrusion coating was carried out by coextruding a barrier layer 4 provided according to the invention, a compatibility agent layer 5 and a functional layer 6.
Zur Verbesserung oder Modifikation der Hafteigenschaften zwischen der Primerschicht 3 und der Barriereschicht 4 kann zwischen diesen beiden Schichten noch eine nicht dargestellte Haftvermittlerschicht eingesetzt werden, die vorzugsweise gemeinsam mit der Barriereschicht 4, der Verträglichkeitsvermittlerschicht 5 und der Funktionsschicht 6 coextrudiert wird.To improve or modify the adhesive properties between the primer layer 3 and the barrier layer 4, an adhesion promoter layer, not shown, can also be used between these two layers, which is preferably coextruded together with the barrier layer 4, the compatibility promoter layer 5 and the functional layer 6.
Ein Nebeneffekt der erfindungsgemäßen Anordnung einer Barriereschicht 4 zwischen der Primerschicht 3 und der Funktionsschicht 6 besteht darin, dass unter Umständen teure Funktionsschichten, bestehend beispielsweise aus Peelmischungen, durch das relativ kostengünstige Barrierematerial ersetzt werden können. Abweichend zu dem in der einzigen Figur dargestellten Ausführungsbeispiel einer erfindungsgemäßen sterilisierbaren Siegelfolie 1 ist die Verwendung von zwei oder mehreren Funktionsschichten statt, wie dargestellt, einer FunktionsSchicht 6 möglich, um die erfindungsgemäße sterilisierbare Siegelfolie 1 an Ihren Einsatzzweck anzupassen. A side effect of the arrangement according to the invention of a barrier layer 4 between the primer layer 3 and the functional layer 6 is that, under certain circumstances, expensive functional layers, consisting for example of peel mixtures, can be replaced by the relatively inexpensive barrier material. In contrast to the exemplary embodiment of a sterilizable sealing film 1 according to the invention shown in the single figure, the use of two or more functional layers instead of, as shown, a functional layer 6 is possible in order to adapt the sterilizable sealing film 1 according to the invention to your intended use.

Claims

Patentansprüche claims
1. Sterilisierbare Siegelfolie mit einem Substrat (2), einer Primerschicht (3) und mindestens einer extrudierten FunktionsSchicht (6) , d a d u r c h g e k e n n z e i c hn e t, dass zwischen der Primerschicht (3) und der extrudierten FunktionsSchicht (6) eine zumindest die Migration von Bestandteilen des Füllgutes verhindernde, extrudierte Barriereschicht (4) vorgesehen ist .1. Sterilizable sealing film with a substrate (2), a primer layer (3) and at least one extruded functional layer (6), characterized in that between the primer layer (3) and the extruded functional layer (6) there is at least a migration of components of the Filling-preventing, extruded barrier layer (4) is provided.
2. Sterilisierbare Siegelfolie nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass die Barriereschicht (4) gute Hafteigenschaften auf der Primerschicht (3) aufweist.2. Sterilizable sealing film according to claim 1, so that the barrier layer (4) has good adhesive properties on the primer layer (3).
3. Sterilisierbare Siegelfolie nach Anspruch 1, d a d u r c h g e k e n n z e i c hn e t, dass zwischen der Primerschicht (3) und der Barriereschicht (4) eine Haftvermittlerschicht und/oder eine Verträglichkeitsvermittlerschicht vorgesehen ist.3. Sterilizable sealing film according to claim 1, so that an adhesion promoter layer and / or a compatibility promoter layer is provided between the primer layer (3) and the barrier layer (4).
4. Sterilisierbare Siegelfolie nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass zwischen der Barriereschicht (4) und der Funktionsschicht (6) eine Verträglichkeitsvermittlerschicht (5) vorgesehen ist. 4. Sterilizable sealing film according to one of claims 1 to 3, characterized in that a compatibility agent layer (5) is provided between the barrier layer (4) and the functional layer (6).
5. Sterilisierbare Siegelfolie nach einem der Ansprüche 1 bis 4, d a d u r c h g e k e n n z e i c h n e t, dass die Barriereschicht (4) und/oder die Haftvermittlerschicht und/oder die Verträglichkeitsvermittlerschicht (5) mit der FunktionsSchicht (6) coextrudiert sind.5. Sterilizable sealing film according to one of claims 1 to 4, so that the barrier layer (4) and / or the adhesion promoter layer and / or the compatibility promoter layer (5) are coextruded with the functional layer (6).
6. Sterilisierbare Siegelfolie nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t, dass die Barriereschicht (4) zumindest teilweise aus Polyamid, modifiziertem Polyamid, Polyamid 6, amorphem oder kristallinem Polycarbonat, Polyester, flüssigkristallinem Polymer, Polyolefin oder gefülltem Polymer besteht.6. Sterilizable sealing film according to one of claims 1 to 5, so that the barrier layer (4) consists at least partially of polyamide, modified polyamide, polyamide 6, amorphous or crystalline polycarbonate, polyester, liquid crystalline polymer, polyolefin or filled polymer.
7. Sterilisierbare Siegelfolie nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t, dass die Barriereschicht und/oder benachbarten Schichten zumindest teilweise aus einem Blend mit einem auf7. Sterilizable sealing film according to one of claims 1 to 6, d a d u r c h g e k e n n e z e i c h n e t that the barrier layer and / or adjacent layers at least partially from a blend with a
Füllgutbestandteilen oder Wärmebehandlungen reagierenden Polymeradditiv besteht. Filling ingredients or heat treatments reacting polymer additive.
PCT/EP2003/008018 2002-08-03 2003-07-23 Sterilisable sealing film comprising a barrier layer WO2004014645A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP03784043A EP1525089A1 (en) 2002-08-03 2003-07-23 Sterilisable sealing film comprising a barrier layer
AU2003254569A AU2003254569A1 (en) 2002-08-03 2003-07-23 Sterilisable sealing film comprising a barrier layer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10235584A DE10235584A1 (en) 2002-08-03 2002-08-03 Sterilizable sealing foil comprises an extruded barrier layer which is located between a primer layer and a functional layer, and prevents migration of constituents of a container filler material
DE10235584.3 2002-08-03

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AU (1) AU2003254569A1 (en)
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DE102004020076A1 (en) * 2004-04-24 2005-11-17 Bayerische Motoren Werke Ag Tubeless vehicle tire has an inner airtight layer of composite thermoplastic film forming part of the tire inner walls
AT13631U1 (en) * 2011-03-16 2014-05-15 Constantia Teich Gmbh Thermoformable, retractable circuit board

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EP1525089A1 (en) 2005-04-27
DE10235584A1 (en) 2004-02-19

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