AU2011202770B2 - Multilayer sheet- or tube-shaped food casing or food film - Google Patents
Multilayer sheet- or tube-shaped food casing or food film Download PDFInfo
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- AU2011202770B2 AU2011202770B2 AU2011202770A AU2011202770A AU2011202770B2 AU 2011202770 B2 AU2011202770 B2 AU 2011202770B2 AU 2011202770 A AU2011202770 A AU 2011202770A AU 2011202770 A AU2011202770 A AU 2011202770A AU 2011202770 B2 AU2011202770 B2 AU 2011202770B2
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- food
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- layers
- polyolefin
- film according
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- 235000013305 food Nutrition 0.000 title claims abstract description 78
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims abstract description 26
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims abstract description 26
- UFRKOOWSQGXVKV-UHFFFAOYSA-N ethene;ethenol Chemical compound C=C.OC=C UFRKOOWSQGXVKV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000004806 packaging method and process Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 29
- 229920000098 polyolefin Polymers 0.000 claims description 28
- 239000002318 adhesion promoter Substances 0.000 claims description 23
- 239000004952 Polyamide Substances 0.000 claims description 21
- 229920002647 polyamide Polymers 0.000 claims description 21
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 15
- 239000004713 Cyclic olefin copolymer Substances 0.000 claims description 15
- IKZZIQXKLWDPCD-UHFFFAOYSA-N but-1-en-2-ol Chemical compound CCC(O)=C IKZZIQXKLWDPCD-UHFFFAOYSA-N 0.000 claims description 13
- -1 polyhexamethylene Polymers 0.000 claims description 13
- 229920000554 ionomer Polymers 0.000 claims description 12
- 101000576320 Homo sapiens Max-binding protein MNT Proteins 0.000 claims description 10
- 229920006121 Polyxylylene adipamide Polymers 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 6
- 239000004793 Polystyrene Substances 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 101150072055 PAL1 gene Proteins 0.000 claims description 2
- 239000005043 ethylene-methyl acrylate Substances 0.000 claims description 2
- 229920005680 ethylene-methyl methacrylate copolymer Polymers 0.000 claims description 2
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920002223 polystyrene Polymers 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims 4
- 230000004888 barrier function Effects 0.000 abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 229910052760 oxygen Inorganic materials 0.000 abstract description 13
- 239000001301 oxygen Substances 0.000 abstract description 13
- 230000003287 optical effect Effects 0.000 abstract description 5
- 150000002926 oxygen Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 100
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 12
- 229920006280 packaging film Polymers 0.000 description 6
- 239000012785 packaging film Substances 0.000 description 6
- 239000007858 starting material Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000012792 core layer Substances 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HGVPOWOAHALJHA-UHFFFAOYSA-N ethene;methyl prop-2-enoate Chemical compound C=C.COC(=O)C=C HGVPOWOAHALJHA-UHFFFAOYSA-N 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/08—Copolymers of ethylene
- B29K2023/083—EVA, i.e. ethylene vinyl acetate copolymer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/08—Copolymers of ethylene
- B29K2023/086—EVOH, i.e. ethylene vinyl alcohol copolymer
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
Abstract Multilayer sheet- or tube-type food casing or food film 5 The present invention for the frst time proposes a multilayer sheet- or tube type food casing or food film produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble process, which is fashioned as a food packaging having the form of shrink bags, salable films, wrapping films or the like. This novel food casing or food film comprises at least nine layers of which an EVOH 10 layer has the form of an oxygen barrier symmetrically embedded between two PA layers intended to impart strength and in turn symmetrically enclosed by two PO layers for the water vapor barrier, and wherein the external layer is formed by a highly temperature-resistant material such as PET which on top of its excellent optical properties also enables clearly higher speeds for further processing (cycle 15 numbers) than were previously known.
Description
AUSTRALIA Patents Act 1990 ORIGINAL COMPLETE SPECIFICATION INVENTION TITLE: MULTILAYER SHEET- OR TUBE-SHAPED FOOD CASING OR FOOD FILM The following statement is a full description of this invention, including the best method of performing it known to us: 27/04/1 lckl9214focntdoe I -2 Multilayer sheet- or tube-type food casing or food film This application is a divisional of application no. 2007283094, the disclosures of which are deemed to be incorporated herein. 5 The present invention relates to a multilayer sheet- or tube-type food casing or food film which is produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble process, in particular for food packagings such as, e.g., shrink bags, sealable films, wrapping films or the like. 10 In practice, such multilayer tube- or sheet-type packaging films are already being utilized in the form of 5- or 7-layered films. Thus, e.g., EP 0 236 099 B2 discloses a multilayer tube-type packaging film 15 for foodstuffs - briefly referred to as a packaging oxygen barrier film - having up to 7 layers. It is a drawback in the disclosed film that the external layer is comprised of a polyolefin (in short: PO) which does provide good protection against humidity for the inner layers but does not have a clearly enhanced temperature resistance in comparison with the inner layer (seal layer). 20 EP 0 476 836 BI discusses a 6-layer packaging film which in contrast contains a temperature-resistant external layer (PET), however the core layers for oxygen barrier and mechanical strength (EVOH / PA) are not protected against humidity by a separate, pure PO layer, for neither PET nor AP (adhesion promoter) satisfy these 25 demands to the water vapor barrier. Moreover the EVOH layer is not sandwiched between two PA layers, thus leading to a very high tendency of curling to the outside which is additionally favored by the lacking external PO layer. 30 EP 1 034 076 BI discusses a packaging film, briefly referred to as a heat-shrinkable thermoplastic multilayer film having a temperature-resistant external layer (PA). This is, however, merely an absolutely asymmetrical 5-layer structure which equally does not have any PO layer as a water vapor barrier from the outside. This in 35 10/ /ll/ll,ckl9214spci2,2 -3 turn results in a particularly high curling tendency, accompanied by a highly impaired water vapor barrier as well as highly impaired strength, for in the absence of any protection the EVOH and the PA are exposed to humidity. 5 PCT/EP2004/051560, published as WO 2005/011978 Al, discloses a 5-layer packaging film having a temperature-resistant external layer (PET) and a core layer of EVOH for a good oxygen barrier. But here, too, no humidity barrier from the outside is provided. In addition it involves an entirely different manufacturing process. The disclosed films are manufactured not by the blown film process with 10 biaxial orientation (triple-bubble process) but by the fundamentally differently designed flat tape process with biaxial orientation (tender-frame process). DE 102 54 172 Al and DE 102 27 580 Al to the same applicant also disclose similar structures of 7-layered packaging films, on the one hand with PO in the 15 external layer as a water vapor barrier, or on the other hand with PET in the external layer as a temperature-resistant layer. But an optimum solution - i.e., temperature resistant external layer, embedding of the oxygen barrier and carrier layers (EVOH + PA) in one external and one internal humidity-repellent layers, as well as a symmetrical arrangement of the water vapor and oxygen barriers and of the carrier 20 layers - can not be realized with only a maximum of seven available layers. Accordingly it would be advantageous to develop a generic multilayer sheet- or tube-type food casing or food film in such a way that a sufficiently tight oxygen barrier may be provided with a concurrently high water vapor barrier and with 25 excellent mechanical strength while avoiding the above-discussed drawbacks. It would be advantageous to develop a like multilayer sheet- or tube-type food casing or food film in such a way that excellent optical properties, good processability, high temperature resistance of the external layer and a satisfactory 30 shrinkage ratio may moreover be ensured. In an embodiment of the invention there is provided a multilayer sheet- or tube-type food casing or food film which is produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble process, with the following layer 35 structure including at least nine layers that are counted from the outside to the inside, wherein: a first layer from the outside contains a layer component selected from a group containing polycaprolactame (PA6), polyhexamethylene adipinamide (PA66), ckl9214speci -3a PA6/66, PAl 1, PA12, or blends of these polyamides, PS (polystyrene), COC (cyclic olefin copolymer) or a blend of COC and a polyolefin, a polyolefin, or blends of different polyolefins, PC (polycarbonate), PMMA, and MXD6, a second layer contains an adhesion promoter as a layer component, a third layer contains a 5 polyolefin, COC, or a blend of COC and polyolefin, as a layer component, a fourth layer contains adhesion promoter as a layer component, a fifth layer contains polyamide or ionomer as a layer component, a sixth layer contains EVOH (ethylene vinyl alcohol) as a layer component, a seventh layer contains polyamide or ionomer as a layer component, an eighth layer contains adhesion promoter as a layer 10 component, and a ninth layer contains a polyolefin as a layer component. In accordance with the invention, a multilayer sheet- or tube-type food casing or food film which is produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble process, in particular for food packagings such as, e.g., ckl9214speci -4 shrink films, sealable films, wrapping films or the like, is being proposed which is for the first time characterized by the following layer structure for the first time including at least nine layers that are counted from the outside to the inside. 5 In an embodiment of the invention the second layer an adhesion promoter, the third layer a polyolefin, preferably polyethylene, the fourth layer an adhesion promoter, the fifth layer polyamide, the sixth layer an EVOH, the seventh layer polyamide, the eighth layer an adhesion promoter, and the ninth layer from the outside, which at the same time is the innermost layer, a polyolefin, preferably 10 polyethylene. EVOH thus advantageously furnishes the desired oxygen barrier. The PA allows to ensure the desired mechanical properties. The polyester allows to ensure excellent optical properties, such as gloss and transparency, and to obtain a high 15 speed of further processing (cycle numbers) thanks to the high temperature resistance. The PO allows to obtain the required water vapor barrier, and it is possible to positively influence the sealing capability of the inner layer, i.e., a high sealing bond 20 strength may be achieved at a lowest possible sealing temperature. In the ideal case, the construction of the carrier and barrier layers (PO/PA/EVOH), designed to realize maximum symmetry, concurrently eliminates the curling tendency or in particular cases at least reduces the latter to an acceptable minimum. 25 The polyolefins include both PE and EVA and EM(M)A within the meaning of the present application, as well as blends of polyolefins as such and also with ionomers. EM(M)A means EMA and/or EMMA, wherein EMA means ethylene methyl acrylate and EMMA means ethylene methyl methacrylate copolymer. 30 Furthermore, EVA designates both EVA and blends of EVA with polymers, ionomers, or EM(M)A. The adhesion promoters (in brief: AP) represent an adhesive layer. EVOH is to be understood both as EVOH and blends of EVOH with other polymers. Moreover PA generally represents PA as well as PA6, PA66, PA 6/66, PA 6/12 or the like, as well as blends of these and blends of PA with other polymers. 35 Advantageously a food casing or food film for food packagings is being furnished which alternatively allows to obtain a defined high shrinkage of up to 60 % or, in contrast, a defined low shrinkage as low as 0 %. 17/01/12,ckl9214speci3,4 By means of the layer structures thus proposed for the first time it is advantageously possible to achieve a particularly high shrinkage For shrink bags etc., amounting to at least 20 % to 60 %, preferably at least 30 % to 50 %, measured at a 5 water temperature of about 90 0 C. By means of the layer structures thus proposed for the first time it is advantageously possible to obtain a particularly low shrinkage for sealable films etc, amounting to 0 % to 30 % at maximum, preferably 2 % to 5%, measured at a water 10 temperature o f about 90'C, By means of the layer structures thus proposed for the first time it is advantageously possible to obtain a particularly low shrinkage for wrapping films etc., amounting to 0 % to 5 % at maximum, preferably 0 % to 2%, measured at a 15 water temperature of about 90'C. With the layer structures thus proposed for the first time it is advantageously possible to provide, for example, a polyolefin, preferably with LDPE, LLDPE, EVA, EM(M)A, ionomers or POP or blends there f etc., as a starting material for the seal 20 layers that are to be provided on the inside of shrink bags or sealable films and wrapping films, respectively. The particularly pronounced oxygen barrier obtained as a result of the layer component EVOH ensures excellent preservation over several weeks without any 25 quality decrease of the foods thereby packaged. Thanks to the extremely well-formed oxygen barrier, the food casing or food film of the invention for the first time furnishes a food packaging whereby even goods that are particularly sensitive to air are not subject to color changes or even to 30 the risk of aging or changing their taste or aroma due to the entry of oxygen, even over long storage periods. Thus, in a a preferred layer structure the layer component EVOH is embedded sandwich-style between two layers including polyamide as a layer component, which 35 leads to a naximun possible oxygen barrier and at the same time ensures excellent embedding and stabilization of the EVOII layer between the two polyamide layers as carrier layers. 2710Ci Ich 9 2 I4Spolrdoi45 -6 As the barrier properties of EVOI and also of PA may be influenced negatively by humidity, a sandwich-type layer structure, i.e., embedding of the EVOH and PA layers between two polyolefin layers as a water vapor barrier front 5 the inside and from the outside, is also preferred here. Hereby an excellent water vapor barrier is made available, which is crucial particularly in the case of meats or other foods that need to be kept fresh. Foodstuffs packaged with the food casing or food film of the invention thus stay fresh for a 10 particularly long time. Owing to the low water vapor permeability, the weight losses involved in storing the foods and particularly in storing meats remain particularly low. 15 The outermost layer of the food casing or food film thus proposed for the first time consists of high temperature-resistant starting materials such as PET and therefore admits the possibility of welding the films by extremely high temperatures without the Cilm being bonded to the welder terminal, As a result, higher cycle numbers may be achieved on the welding machines, In addition the film is 20 substantially less sensitive to external injury and possesses - as is customary for PET - excellent optical properties in regard of gloss and transparency. Furthermore the film is particularly well suited for inscribing or printing. In addition, the food casing or food film of the invention may be manufactured 25 and processed particularly well with the aid of corresponding facilities by the same applicant. Advantageous aspects or developments of the invention result from the features of the appended claims, 30 Thus, in a preferred embodiment of the food casing or food film for food packagings in accordance with the invention it is provided that layers which contain polyethylene as a layer component alternatively also contain polypropylene, EVA (Ethyl Vinyl Alcohol), EN4(M)A, ionomers, or blends of these, or the like, 35 27/04/1I1,ck1921 ;poci d-,6 -7 In a preferred embodiment it is moreover provided that layers which contain an adhesion promoter optionally include an adhesion promoter on the basis of PE, EVA, EM(M)A or of an ionomer as a base material. 5 In accordance with a further preferred embodiment it is provided that layers which include an adhesion promoter as a component alternatively contain a blend of polyolefin and adhesion promoter or a blend of EVA and/or EM(M)A and adhesion promoter. 10 In accordance with a further preferred embodiment it is provided that layers which include EVOH as a layer component alternatively contain MXD6 (modified polyamide). In a further preferred embodiment it is provided that layers which include 15 EVOR as a component alternatively contain PVA. In accordance with a further preferred embodiment of the food casing or food film of the invention it is provided that layers which include polyamide as a layer component alternatively contain an lonomer. 20 In accordance with a preferred embodiment it is furthermore provided that layers which include polyamide as a layer component alternatively contain MXD6. Not last it is provided in accordance with a preferred embodiment that layers 25 which include polyamide as a layer component contain polycaprolactame (PA6), polyhexamethylene adipinamide (PA66), PA 6/66, PA 11, PA 12, or blends of these polyamides or the like. Equally preferred is another embodiment wherein layers which include 30 polyamide as a component alternatively contain blends of PA and EVOH, or PA and PVA or PA and MXD6, respectively. In accordance with a further preferred embodiment it is provided that layers which contain EVOH or PVA or MXD6, respectively, alternatively include blends of 35 these starting materials with PA. 27/0411 1,(kI192439a..dce,7 Another preferred embodiment provides that the external PO layer (3rd layer from the outside) alternatively contains a COC or a blend of a polyolefin and a COC. Further preferred embodiments provide that the external layer which contains 5 PET alternatively includes PA, MXD6, PS, PMMA, or PC. In addition, further preferred embodiments provide that the external layer which contains PET alternatively includes COC, PP, or HDPE or blends of these starting materials with polyolefin, respectively. 10 In a further preferred embodiment, the food casing or food film of the invention is realized as a food packaging having the form of a shrink bag, a sealable film, a wrapping film, or the like. 15 The present invention thus for the first time proposes a sheet- or tube-type food casing or food film having a layer structure with at least nine layers, which possesses for an oxygen barrier an EVOH layer symmetrically embedded between two PA layers intended to impart strength and in turn symmetrically enclosed by two PO layers for the water vapor barrier, and wherein the external layer is formed by a high 20 temperature-resistant material such as PET which on top of its excellent optical properties also enables clearly higher speeds for further processing (cycle numbers) than were previously known. Throughout this specification and the claims which follow, unless the context 25 requires otherwise, the word "comprise", and variations such as "comprises" and "comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps. 30 The reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that the prior art forms part of the common general knowledge. ckl9214speci
Claims (13)
1. A multilayer sheet- or tube-type food casing or food film which is produced by the nozzle blast-drawing process and biaxially oriented by the triple-bubble 5 process, with the following layer structure including at least nine layers that are counted from the outside to the inside, wherein: - a first layer from the outside contains a layer component selected from a group containing polycaprolactame (PA6), polyhexamethylene adipinamide (PA66), PA6/66, PAll, PA12, or blends of these 10 polyamides, PS (polystyrene), COC (cyclic olefin copolymer) or a blend of COC and a polyolefin, a polyolefin, or blends of different polyolefins, PC (polycarbonate), PMMA (polymethylmethacrylate), and MXD6, (modified polyamide), - a second layer contains an adhesion promoter as a layer component, 15 - a third layer contains a polyolefin, COC, or a blend of COC and polyolefin, as a layer component, - a fourth layer contains adhesion promoter as a layer component, - a fifth layer contains polyamide or ionomer as a layer component, - a sixth layer contains EVOH (ethylene vinyl alcohol) as a layer 20 component, - a seventh layer contains polyamide or ionomer as a layer component, - an eighth layer contains adhesion promoter as a layer component, and - a ninth layer contains a polyolefin as a layer component. 25
2. The food casing or food film according to claim 1 wherein the polyolefin in the first layer is selected from PP (polypropylene) or HDPE (high density polyethylene).
3. The food casing or food film according to claim I or 2, wherein the layers 30 which contain a polyolefin as a layer component independently also contain further polyolefins, PP, EVA (ethylvinylalcohol), EM(M)A, ionomers or blends of these, wherein EM(M)A means EMA and/or EMMA, wherein EMA means ethylene-methyl acrylate and EMMA means ethylene methyl methacrylate copolymer. 35 ckl9214speci - 10
4. The food casing or food film according to any one of claims 1 to 3, wherein the layers which contain an adhesion promoter independently include PE, PP, EVA, EM(M)A or of an ionomer as a base material.
5 5. The food casing or food film according to any one of claims 1 to 3, wherein the layers which include an adhesion promoter independently contain a blend of polyolefin and adhesion promoter, or a blend of EVA and/or EM(M)A and adhesion promoter, or ionomer and adhesion promoter. 10
6. The food casing or food film according to any one of claims I to 5, wherein the layers which include EVOH as a layer component independently also contain MXD6 or PVA (polyvinyl alcohol).
7. The food casing or food film according to any one of claims 1 to 6, wherein the 15 polyamide of the layers which include polyamide is independently selected from polycaprolactame (PA6), polyhexamethylene adipinamide (PA66), PA6/66, PAl 1, PA12, or blends of these polyamides and MXD6.
8. The food casing or food film according to any one of claims 1 to 6, wherein the 20 layers which include polyamide independently comprise blends of PA and EVOH, or PA and PVA.
9. The food casing or food film according to any one of claims 1 to 8, wherein the layers which include EVOH or PVA or MXD6 comprise blends of these 25 materials with PA.
10. The food casing or food film according to any one of claims I to 9, wherein third layer from the outside contains a COC or a blend of COC and a polyolefin as a layer component. 30
11. The food casing or food film according to any one of claims I to 10, wherein the third and/or ninth layer contains polyethylene as a polyolefin layer component. 35
12. The food casing or food film according to any one of claims 1 to 11, wherein it is for food packagings. ckl9214speci - 11
13. The food casing or food film according to any one of claims 1 to 12, wherein it is fashioned as a food packaging having the form of a shrink bag, a sealable film, or a wrapping film. ckl9214speci
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2011202770A AU2011202770B2 (en) | 2006-08-07 | 2011-04-29 | Multilayer sheet- or tube-shaped food casing or food film |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102006036844.4 | 2006-08-07 | ||
| AU2011202770A AU2011202770B2 (en) | 2006-08-07 | 2011-04-29 | Multilayer sheet- or tube-shaped food casing or food film |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2007283094A Division AU2007283094B2 (en) | 2006-08-07 | 2007-08-07 | Multilayer sheet- or tube-shaped food casing or food film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2011202770A1 AU2011202770A1 (en) | 2011-06-30 |
| AU2011202770B2 true AU2011202770B2 (en) | 2012-02-16 |
Family
ID=45419790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2011202770A Ceased AU2011202770B2 (en) | 2006-08-07 | 2011-04-29 | Multilayer sheet- or tube-shaped food casing or food film |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2011202770B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001003922A1 (en) * | 1999-07-14 | 2001-01-18 | Tecno Coating Engineering S.R.L. | A multilayer heat-shrinkable plastic film with barrier characteristics |
| DE10227580A1 (en) * | 2002-06-20 | 2004-01-08 | Kuhne Anlagenbau Gmbh | Multi-layer, flat or tubular food casing or film |
| EP1749655A1 (en) * | 2005-08-05 | 2007-02-07 | Curwood, Inc. | Multilayer Coextruded Films Including Frangible Intralaminar Bonding Forces |
-
2011
- 2011-04-29 AU AU2011202770A patent/AU2011202770B2/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001003922A1 (en) * | 1999-07-14 | 2001-01-18 | Tecno Coating Engineering S.R.L. | A multilayer heat-shrinkable plastic film with barrier characteristics |
| DE10227580A1 (en) * | 2002-06-20 | 2004-01-08 | Kuhne Anlagenbau Gmbh | Multi-layer, flat or tubular food casing or film |
| EP1749655A1 (en) * | 2005-08-05 | 2007-02-07 | Curwood, Inc. | Multilayer Coextruded Films Including Frangible Intralaminar Bonding Forces |
| AU2006202689A1 (en) * | 2005-08-05 | 2007-02-22 | Curwood Inc | Multilayer coextruded films including frangible intralaminar bonding forces |
Non-Patent Citations (1)
| Title |
|---|
| STOBIE, J.D. et al., 'Producing Coextruded high barrier Heat-Shrinkable Packaging Films', macro Engineering &Technology, 01 October 2003 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2011202770A1 (en) | 2011-06-30 |
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