DE102010005277A1 - Multilayer film comprises first layer, primer layer, polyamide layer, high barrier layer, additional polyamide layer, additional primer layer and polypropylene layer - Google Patents
Multilayer film comprises first layer, primer layer, polyamide layer, high barrier layer, additional polyamide layer, additional primer layer and polypropylene layer Download PDFInfo
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- DE102010005277A1 DE102010005277A1 DE102010005277A DE102010005277A DE102010005277A1 DE 102010005277 A1 DE102010005277 A1 DE 102010005277A1 DE 102010005277 A DE102010005277 A DE 102010005277A DE 102010005277 A DE102010005277 A DE 102010005277A DE 102010005277 A1 DE102010005277 A1 DE 102010005277A1
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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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
- B32B2250/00—Layers arrangement
- B32B2250/05—5 or more layers
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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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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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
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/31—Heat sealable
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/58—Cuttability
- B32B2307/581—Resistant to cut
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
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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
- 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
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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
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/46—Bags
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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
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
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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
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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
- B32B27/30—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
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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
- B32B27/32—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
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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
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
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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
- 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
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Abstract
Description
Die vorliegende Erfindung betrifft eine Mehrschichtfolie, und insbesondere eine Mehrschichtfolie die sieben Schichten aufweist.The present invention relates to a multilayer film, and more particularly to a multilayer film comprising the seven layers.
Folien, die z. B. im Lebensmittelbereich eingesetzt werden, müssen gewisse Eigenschaften hinsichtlich der Verarbeitbarkeit aufweisen, sowie gute Barriereeigenschaften gegenüber atmosphärischen Gasen, wie z. B. Sauerstoff, besitzen. Kein Kunststoff verfügt derzeit alleine über alle geforderten Eigenschaften. Aus diesem Grund werden mehrschichtige Folien verwendet. Ferner sollen Folien, die im Verpackungsbereich verwendet werden, bei niedriger Siegelanspringtemperatur siegelfähig sein. Dadurch wird ein wirtschaftliches verarbeiten auf Verpackungsmaschinen gewährleistet. Durch Koextrusion oder Lamination wird eine Kombination der verschiedenen Werkstoffen in einem Verbund erreicht. So können die additiven Folienlagen die gewünschten Eigenschaften wie Flexibilität, Durchstoßfestigkeit und Transparenz gewährleisten.Films that z. B. used in the food industry, must have certain properties in terms of processability, as well as good barrier properties to atmospheric gases such. As oxygen, possess. No plastic currently has all the required properties on its own. For this reason, multilayer films are used. Further, films used in the packaging field should be sealable at low seal initiation temperature. This ensures economical processing on packaging machines. Coextrusion or lamination results in a combination of the different materials in a composite. Thus, the additive film layers can ensure the desired properties such as flexibility, puncture resistance and transparency.
Die
Im Lebensmittelbereich ist eine der gebräuchlichsten Standardverpackungen ein Polyamid/Polyethylen (PA/PE) Siegelrandbeutel mit einer Gesamtfoliendicke von 90 μm (20 μm PA, 70 μm PE).In the food sector, one of the most common standard packaging is a polyamide / polyethylene (PA / PE) sealed-edge bag with a total film thickness of 90 μm (20 μm PA, 70 μm PE).
Es besteht der Wunsch nach verbesserten Eigenschaften und/oder einer Reduktion der additiven Dicke der gesamten Folie. Dabei soll entweder bei gegebener Foliendicke eine Verbesserung der Eigenschaften, z. B. der Barrierenwirkung gegenüber Sauerstoff, erreicht werden, oder bei gegebenen Eigenschaften eine Reduktion der Dicke und damit eine Kostenersparnis erreicht werden.There is a desire for improved properties and / or a reduction in the additive thickness of the entire film. It should either be given a film thickness improvement in the properties, eg. As the barrier effect against oxygen, can be achieved, or given properties, a reduction in thickness and thus cost savings can be achieved.
Es ist Aufgabe der vorliegenden Erfindung eine Folie bereitzustellen, die sich durch eine Kombination der folgenden Eigenschaften auszeichnet:
- – geringe Foliendicke
- – gute Schweißeigenschaften, auch bei kontaminierten Siegelflächen
- – hohe Reiß- und Durchstoßfestigkeit
- – hohe Gas bzw. Sauerstoffbarriere
- – gute Optik und Transparenz
- - low film thickness
- - good welding properties, even with contaminated sealing surfaces
- - high tear and puncture resistance
- - high gas or oxygen barrier
- - good looks and transparency
Diese Aufgabe wird durch die Merkmale der Patentansprüche gelöst.This object is solved by the features of the claims.
Die Erfindung geht von folgendem Grundgedanken aus: Durch eine Mehrschichtfolie, mit (a) einer ersten Schicht, die aus Metallocenpolyethylen (MPE) oder Polyethylen niedriger Dichte (LDPE) oder einer Mischung aus MPE und LDPE besteht, (b) einer Haftvermittlerschicht, (c) einer Polyamidschicht, (d) einer Hochbarriereschicht aus Ethylen/Vinylalkohol-Copolymer, (e) einer weiteren Polyamidschicht, (f) einer weiteren Haftvermittlerschicht, und (g) einer Polypropylenschicht, wobei die Schichten (a) bis (g) in dieser Reihenfolge angeordnet sind, können die gewünschten Eigenschaften der Folie erreicht werden.The invention is based on the following basic idea: by a multilayer film comprising (a) a first layer consisting of metallocene polyethylene (MPE) or low density polyethylene (LDPE) or a mixture of MPE and LDPE, (b) a primer layer, (c ) a polyamide layer, (d) an ethylene / vinyl alcohol copolymer high barrier layer, (e) another polyamide layer, (f) another adhesive layer, and (g) a polypropylene layer, wherein layers (a) through (g) are in this order are arranged, the desired properties of the film can be achieved.
Die Mehrschichtfolie der vorliegenden Erfindung (HSS-Folie: High Barrier, Excellent Sealing, High Strength) weist sieben Schichten auf. Die erste Schicht besteht aus speziellem Polyethylen, dass mit Hilfe eines Metallocen-Katalysators hergestellt wird, sogenanntem Metallocenpolyethylen (MPE), oder aus Polyethylen niedriger Dichte (LDPE), oder aus einer Kombination von beidem. Durch Verwendung von MPE kann eine besonders hohe Festigkeit erreicht werden. Die zweite Außenschicht, d. h. die siebte Schicht, besteht aus Polypropylen. Die mittlere Schicht ist eine Hochbarriereschicht. Sie besteht aus Ethylen/Vinylalkohol-Copolymer (EVOH) und dient als Barriere gegenüber Gasen, z. B. Sauerstoff. Auf beiden Seiten der Hochbarriereschicht sind Polyamidschichten angeordnet. Die beiden Polyamidschichten tragen zur Festigkeit der resultierenden Mehrschichtfolienstruktur bei. Die beiden Außenschichten sind über sogenannte Haftvermittlerschichten mit den beiden Polyamidschichten verbunden. Die beiden Haftvermittlerschichten bestehen aus polyolefinischen Materialien.The multilayer film of the present invention (HSS film: High Barrier, Excellent Sealing, High Strength) has seven layers. The first layer is made of special polyethylene produced by a metallocene catalyst, so-called metallocene polyethylene (MPE), or low density polyethylene (LDPE), or a combination of both. By using MPE, a particularly high strength can be achieved. The second outer layer, d. H. the seventh layer, is made of polypropylene. The middle layer is a high barrier layer. It consists of ethylene / vinyl alcohol copolymer (EVOH) and serves as a barrier to gases, eg. B. oxygen. On both sides of the high barrier layer polyamide layers are arranged. The two polyamide layers contribute to the strength of the resulting multilayer film structure. The two outer layers are connected via so-called adhesive layers with the two polyamide layers. The two primer layers are made of polyolefinic materials.
Falls die Mehrschichtfolie als Siegelrandbeutel verwendet wird, stellt die erste Schicht die Innenseite dar.If the multi-layer film is used as a sealed-edge bag, the first layer represents the inside.
Die Mehrschichtfolie der vorliegenden Erfindung weist eine Gesamtdicke zwischen 50 und 70 μm und bevorzugt von 60 μm auf. Dabei beträgt die Dicke der ersten Schicht z. B. ca. 20 bis 25 μm, die Dicke der Polyamidschichten z. B. ca. 1 bis 3 μm, die Dicke der Haftvermittlerschichten z. B. ca. 4 bis 5 μm, die Dicke der Polypropylenschicht z. B. ca. 20 bis 25 μm, und die Dicke der Hochbarrierenschicht z. B. ca. 5 μm.The multilayer film of the present invention has an overall thickness between 50 and 70 μm, and preferably 60 μm. The thickness of the first layer z. B. about 20 to 25 microns, the thickness of the polyamide z. B. about 1 to 3 microns, the thickness of the primer layers z. B. about 4 to 5 microns, the thickness of the polypropylene layer z. B. about 20 to 25 microns, and the thickness of the high barrier layer z. B. about 5 microns.
Die Erfindung wird nachstehend mit Bezug auf die einzige Zeichnung (
Die Eigenschaften eines Kunststoffs hängen davon ab, welcher Katalysator verwendet wird. Metallocen ist ein Katalysator, der verwendet wird, um Polyethylen herzustellen. Bei Metallocen-Polymeren sind die entstehenden Polymere einander sehr ähnlich. Durch die Verwendung von MPE wird eine sehr hohe Festigkeit dieser Folienschicht und damit der gesamten Folie erreicht.The properties of a plastic depend on which catalyst is used. Metallocene is a catalyst used to make polyethylene. For metallocene polymers, the resulting polymers are very similar to each other. By using MPE a very high strength of this film layer and thus the entire film is achieved.
Bei dem hier verwendeten Polyethylen niedriger Dichte (LDPE) sind die Polymerketten stark verzweigt. Daher weist LDPE eine geringe Dichte zwischen 0,915 g/cm3 und 0,935 g/cm3 auf. LD steht dabei für „low density”.In the low density polyethylene (LDPE) used here, the polymer chains are highly branched. Therefore, LDPE has a low density between 0.915 g / cm 3 and 0.935 g / cm 3 . LD stands for "low density".
Im Gegensatz dazu weist das Polymermolekül beim linearen Polyethylen niedriger Dichte (LLDPE) nur kurze Verzweigungen auf. LLD steht dabei für „linear low density”.In contrast, in the linear low density polyethylene (LLDPE), the polymer molecule has only short branches. LLD stands for "linear low density".
In
Die Mittlere der sieben Schichten ist die Hochbarriereschicht (
Nach der Hochbarriereschicht (
Im Anschluss an die Polyamidschicht (
Die Mehrschichtfolie wird durch Koextrusion hergestellt.The multilayer film is produced by coextrusion.
Die erfindungsgemäße Mehrschichtfolie lässt sich gut versiegeln. Bei der Verpackung mit Lebensmitteln wird die Folie häufig auch an den zu versiegelnden Siegelflächen kontaminiert, z. B. mit Blut, Fett oder Kartoffelstärke. Bei der erfindungsgemäßen Folie ist eine exzellente Schweißbarkeit auch bei den kontaminierten Siegelflächen gewährleistet.The multilayer film according to the invention can be sealed well. When packaging with food, the film is often contaminated on the sealing surfaces to be sealed, z. B. with blood, fat or potato starch. In the film according to the invention excellent weldability is ensured even in the contaminated sealing surfaces.
Lebensmittel werden häufig in sogenannten Siegelrandbeuteln verpackt. Wird die erfindungsgemäße Folie für einen solchen Siegelrandbeutel verwendet, dann befindet sich die erste Schicht (
Mit der erfindungsgemäßen Mehrschichtfolie aus sieben Schichten wird ein Folie zur Verfügung gestellt, mit der bei relativ geringer Dicke (ca. 60 μm oder weniger) eine hohe Reiß- und Durchstoßfestigkeit, eine hohe Gas bzw. Sauerstoffbarriere, eine gute Optik und Transparenz, und gute Schweißeigenschaften, auch bei kontaminierten Siegelflächen, erreicht wird.With the multilayer film of seven layers according to the invention, a film is made available with a relatively low thickness (about 60 microns or less) high tear and puncture resistance, a high gas or oxygen barrier, good appearance and transparency, and good Welding properties, even with contaminated sealing surfaces, is achieved.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 3789629 T3 [0003] DE 3789629 T3 [0003]
Claims (8)
Priority Applications (1)
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DE102010005277A DE102010005277A1 (en) | 2010-01-21 | 2010-01-21 | Multilayer film comprises first layer, primer layer, polyamide layer, high barrier layer, additional polyamide layer, additional primer layer and polypropylene layer |
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Application Number | Priority Date | Filing Date | Title |
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DE102010005277A DE102010005277A1 (en) | 2010-01-21 | 2010-01-21 | Multilayer film comprises first layer, primer layer, polyamide layer, high barrier layer, additional polyamide layer, additional primer layer and polypropylene layer |
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DE102010005277A1 true DE102010005277A1 (en) | 2011-07-28 |
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DE102010005277A Ceased DE102010005277A1 (en) | 2010-01-21 | 2010-01-21 | Multilayer film comprises first layer, primer layer, polyamide layer, high barrier layer, additional polyamide layer, additional primer layer and polypropylene layer |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2556966A1 (en) * | 2011-08-12 | 2013-02-13 | Nordenia Deutschland Gronau GmbH | Yellowing-resistant decorative film for coating a holder, in particular a component of an automobile or a piece of furniture, with a coating compound comprising at least one barrier coating and a decorative coating |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3789629D1 (en) * | 1986-02-28 | 1994-05-26 | Grace W R & Co | Packaging oxygen barrier film. |
WO1995033621A1 (en) * | 1994-06-06 | 1995-12-14 | W.R. Grace & Co.-Conn. | Laminates for form-fill-seal packaging |
US5595623A (en) * | 1990-11-16 | 1997-01-21 | W. R. Grace Co.-Conn. | Method for making a barrier film with improved extensibility for cheese packaging |
DE102004055323A1 (en) * | 2004-11-16 | 2006-05-18 | Cfs Kempten Gmbh | Transparent thermoformable films with anti-fog properties |
DE60212816T2 (en) * | 2001-03-16 | 2006-11-09 | Cryovac, Inc. | COEXTRUDED, STERILIZABLE MULTILAYER FILM |
-
2010
- 2010-01-21 DE DE102010005277A patent/DE102010005277A1/en not_active Ceased
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3789629D1 (en) * | 1986-02-28 | 1994-05-26 | Grace W R & Co | Packaging oxygen barrier film. |
DE3789629T3 (en) | 1986-02-28 | 2005-06-23 | Cryovac, Inc. | Packaging oxygen barrier layer |
US5595623A (en) * | 1990-11-16 | 1997-01-21 | W. R. Grace Co.-Conn. | Method for making a barrier film with improved extensibility for cheese packaging |
WO1995033621A1 (en) * | 1994-06-06 | 1995-12-14 | W.R. Grace & Co.-Conn. | Laminates for form-fill-seal packaging |
DE60212816T2 (en) * | 2001-03-16 | 2006-11-09 | Cryovac, Inc. | COEXTRUDED, STERILIZABLE MULTILAYER FILM |
DE102004055323A1 (en) * | 2004-11-16 | 2006-05-18 | Cfs Kempten Gmbh | Transparent thermoformable films with anti-fog properties |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2556966A1 (en) * | 2011-08-12 | 2013-02-13 | Nordenia Deutschland Gronau GmbH | Yellowing-resistant decorative film for coating a holder, in particular a component of an automobile or a piece of furniture, with a coating compound comprising at least one barrier coating and a decorative coating |
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