FR2696998A1 - Multilayer covering film with inner layer of ethylene]-acrylic] ester copolymer - intermediate barrier layer of ethylene]-vinyl] alcohol copolymer, outer layer of ionomeric resin, and two bonding layers for vacuum packing of food - Google Patents
Multilayer covering film with inner layer of ethylene]-acrylic] ester copolymer - intermediate barrier layer of ethylene]-vinyl] alcohol copolymer, outer layer of ionomeric resin, and two bonding layers for vacuum packing of food Download PDFInfo
- Publication number
- FR2696998A1 FR2696998A1 FR9206463A FR9206463A FR2696998A1 FR 2696998 A1 FR2696998 A1 FR 2696998A1 FR 9206463 A FR9206463 A FR 9206463A FR 9206463 A FR9206463 A FR 9206463A FR 2696998 A1 FR2696998 A1 FR 2696998A1
- Authority
- FR
- France
- Prior art keywords
- ethylene
- copolymer
- layer
- microns
- thickness
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 229920001577 copolymer Polymers 0.000 title claims abstract description 16
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000005977 Ethylene Substances 0.000 title claims abstract description 13
- 230000004888 barrier function Effects 0.000 title claims abstract description 11
- 239000011347 resin Substances 0.000 title claims abstract description 7
- 229920005989 resin Polymers 0.000 title claims abstract description 7
- 238000009461 vacuum packaging Methods 0.000 title claims description 4
- 235000013305 food Nutrition 0.000 title description 5
- 229920002554 vinyl polymer Polymers 0.000 title 1
- 239000011230 binding agent Substances 0.000 claims abstract description 15
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 claims abstract description 4
- -1 acrylic ester Chemical class 0.000 claims abstract description 4
- 229920000554 ionomer Polymers 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 20
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims 2
- 239000004698 Polyethylene Substances 0.000 claims 1
- 229920000573 polyethylene Polymers 0.000 claims 1
- 238000004806 packaging method and process Methods 0.000 description 6
- 229920003313 Bynel® Polymers 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920003948 DuPont™ Surlyn® 1802 Polymers 0.000 description 1
- 229920003182 Surlyn® Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
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
- B32B27/06—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
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (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
- B32B27/32—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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
-
- 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
Landscapes
- Laminated Bodies (AREA)
Abstract
Il est constitué par l'assemblage des cinq couches ci-après: - une couche interne de scellabilité d'une épaisseur de 15 à 30 microns, constituée d'un copolymère d'éthylène et d'un ester acrylique; - une couche de liant intérieur d'une épaisseur de 5 à 11 microns, - une couche barrière intermédiaire d'une épaisseur de 8 à 13 microns, constituée d'un copolymère d'éthylène et d'alcool vinylique; - une couche de liant extérieur d'une épaisseur de 5 à 11 microns - une couche externe d'une épaisseur de 50 à 70 microns, constituée d'une résine ionomère.It consists of the assembly of the five layers below: - an internal sealability layer with a thickness of 15 to 30 microns, consisting of a copolymer of ethylene and of an acrylic ester; - an inner binder layer with a thickness of 5 to 11 microns, - an intermediate barrier layer with a thickness of 8 to 13 microns, consisting of a copolymer of ethylene and vinyl alcohol; - an outer binder layer with a thickness of 5 to 11 microns - an outer layer with a thickness of 50 to 70 microns, made of an ionomer resin.
Description
La présente invention a pour objet un film d'operculage destine notamment au conditionnement sous vide de produits tels que des produits agro-alimentaires. The present invention relates to a sealing film intended in particular for vacuum packaging of products such as food products.
On sait que la conservation de certains produits agro-alimentaires nécessite des précautions particulières. We know that the conservation of certain agro-food products requires special precautions.
Ainsi les terrines doivent de préférence être conditionnées sous vide à l'aide de deux films dont le premier, film intérieur plus épais, est déformé à chaud dans le moule d'une machine à thermoformer pour prendre la forme de l'alvéole dans laquelle la terrine sera introduite, tandis que le second, film supérieur, opercule l'alvéole à laquelle il se soude après mise sous vide de la terrine, assurant l'étanchéité de l'ensemble.So the terrines should preferably be vacuum-packed using two films, the first of which, a thicker inner film, is deformed when hot in the mold of a thermoforming machine to take the shape of the cell in which the terrine will be introduced, while the second, upper film, covers the cell to which it is welded after placing the terrine under vacuum, ensuring the tightness of the whole.
La mise en oeuvre de deux films différents présente des inconvénients divers, tant au plan de la réalisation de l'emballage qu'à celui de la distribution du produit, en raison des reprises d'air fréquentes dues aux manipulations, qui entraînent des problèmes de conservation du produit. The implementation of two different films has various drawbacks, both in terms of the production of the packaging and that of the distribution of the product, due to the frequent air intake due to handling, which cause problems of conservation of the product.
La présente invention vise à remédier à ces inconvénients en proposant un film d'operculage qui réponde aux exigences attachées au conditionnement de produits agroalimentaires tout en étant d'une mise en oeuvre simplifiée, ledit film d'operculage permettant en outre d'améliorer de façon notable la conservabilité des produits qu'il i 1 sert à conditionner. The present invention aims to remedy these drawbacks by proposing a sealing film which meets the requirements attached to the packaging of food products while being simplified, said sealing film also making it possible to improve notable is the preservability of the products it i 1 is used for packaging.
La présente invention a ainsi pour objet un film d'operculage destiné notamment au conditionnement sous vide de produits agro-alimentaires, en particulier de terrines, ce film se caractérisant essentiellement en ce qu'il présente une structure coextrudée en cinq couches, à savoir, de l'intérieur vers l'extérieur - une couche interne de scellabilité - un liant intérieur - une couche barrière intermédiaire - un liant extérieur - une couche externe. The present invention thus relates to a sealing film intended in particular for vacuum packaging of food products, in particular terrines, this film being essentially characterized in that it has a coextruded structure in five layers, namely, from the inside to the outside - an internal sealable layer - an internal binder - an intermediate barrier layer - an external binder - an external layer.
Selon une premiere caracteristique du film d'operculage selon l'invention, la couche de scellabilité, qui est au contact du produit à conditionner, est constituée d'un copolymère d'éthylène et d'un ester acrylique qui peut être avantageusement l'acrylate de méthyle, mis en oeuvre à raison d'environ 20 % en poids du copolymère. According to a first characteristic of the sealing film according to the invention, the sealability layer, which is in contact with the product to be packaged, consists of an ethylene copolymer and an acrylic ester which can advantageously be acrylate methyl, used in an amount of about 20% by weight of the copolymer.
Un tel copolymère présente en effet les qualités requises pour un film en contact direct avec une denrée alimentaire, et notamment d'être en conformité avec les règlementations en vigueur. D'autre part il présente l'avantage d'être facilement soudable à la plupart des supports, qu'ils soient en matière plastique, en métal, en verre, en céramique, ou autre matériau, par thermosoudage à basse température, de l'ordre de 40-50 C, du fait de son bas point de ramollissement. Such a copolymer indeed has the qualities required for a film in direct contact with a foodstuff, and in particular to be in compliance with the regulations in force. On the other hand, it has the advantage of being easily weldable to most supports, whether plastic, metal, glass, ceramic, or other material, by heat sealing at low temperature, about 40-50 C, due to its low softening point.
Conformément à l'invention la couche de scellabilité du film d'operculage qui en fait l'objet presente avantageusement une épaisseur comprise entre 15 et 30 microns. According to the invention the sealability layer of the sealing film which is the subject advantageously has a thickness between 15 and 30 microns.
A titre d'exemple de copolymères utilisables pour constituer ladite couche de scellabilité, on peut citer ceux commercialises sous la dénomination "LOTRYL" par la firme française ATOCHEM. By way of example of copolymers which can be used to form said sealability layer, mention may be made of those sold under the name "LOTRYL" by the French company ATOCHEM.
Selon une seconde caractéristique du film d'operculage selon l'invention, la couche barrière intermédiaire est constituée d'un copolymère d'éthylène et d'alcool vinylique, de préférence à 44 % d'éthylène, qui a pour fonction de constituer une barrière efficace aux gaz et à l'humidité, permettant de prolonger notablement la durée de conservation du produit. According to a second characteristic of the sealing film according to the invention, the intermediate barrier layer consists of a copolymer of ethylene and vinyl alcohol, preferably 44% ethylene, which has the function of constituting a barrier effective at gases and humidity, making it possible to significantly extend the shelf life of the product.
Conformément à l'invention, ladite couche barrière présente avantageusement une épaisseur comprise entre 8 et 13 microns. According to the invention, said barrier layer advantageously has a thickness of between 8 and 13 microns.
A titre d'exemple de copolymères utilisables pour constituer cette couche barrière, on peut citer ceux commercialisés sous la dénomination "SOARNOL" par la firme française ATOCHEM. By way of example of copolymers which can be used to constitute this barrier layer, mention may be made of those marketed under the name "SOARNOL" by the French company ATOCHEM.
Selon une troisième caractéristique du film d'operculage selon l'invention, la couche externe est constituee d'une résine ionomère apte à résister aux chocs et aux manipulations, telle qu'une résine monomère dérivée d'un copolymère d'éthylène et d'acide méthacrylique. According to a third characteristic of the sealing film according to the invention, the outer layer consists of an ionomer resin capable of withstanding impact and handling, such as a monomer resin derived from a copolymer of ethylene and of methacrylic acid.
Conformément à l'invention, ladite couche externe présente avantageusement une épaisseur comprise entre 50 et 70 microns. According to the invention, said outer layer advantageously has a thickness of between 50 and 70 microns.
A titre d'exemple de résines utilisables pour réaliser cette couche externe, on peut citer celles commercialisées sous la dénomination "SURLYN" par la Firme américaine Du Pont de Nemours. By way of example of resins which can be used to make this outer layer, mention may be made of those sold under the name "SURLYN" by the American firm Du Pont de Nemours.
Les liants mis en oeuvre pour assembler ces trois couches du film d'operculage selon l'invention peuvent être n'importe quel liant présentant une bonne résistance mécanique, compatible avec les films utilisés et apte à être incorporé à un conditionnement alimentaire. The binders used to assemble these three layers of the sealing film according to the invention can be any binder having good mechanical strength, compatible with the films used and capable of being incorporated into food packaging.
A titre d'exemple de liant utilisable on peut citer les compositions à base de polyéthylène de basse densité linéaire, telles que celles commercialisées sous la dénomination "BYNEL" par la firme américaine Du Pont de
Nemours.By way of example of a binder which can be used, mention may be made of compositions based on linear low density polyethylene, such as those sold under the name "BYNEL" by the American firm Du Pont de
Nemours.
Conformément à l'invention, les deux couches de liant mises en oeuvre présentent avantageusement chacune une épaisseur comprise entre 4 et 11 microns. According to the invention, the two layers of binder used advantageously each have a thickness of between 4 and 11 microns.
Le film d'operculage selon l'invention peut être réalisé par coextrusion des cinq couches mises en oeuvre, cette coextrusion pouvant être réalisée à une température de l'ordre de 200 C à l'aide d'une extrudeuse appropriée. The sealing film according to the invention can be produced by coextrusion of the five layers used, this coextrusion being able to be produced at a temperature of the order of 200 ° C. using an appropriate extruder.
Le film d'operculage selon l'invention présente de nombreux avantages par rapport à ceux existants actuellement, et notamment, outre celui de remplacer par un seul film les deux films qui conditionnent actuellement les produits du type terrine, celui de présenter l'effet de seconde peau sur le produit emballé, avec lequel l'emballage se confond, et de former une barrière aux gaz et à l'humidité particulièrement efficace. The sealing film according to the invention has many advantages over those currently existing, and in particular, in addition to replacing with a single film the two films which currently condition products of the terrine type, that of exhibiting the effect of second skin on the packaged product, with which the packaging merges, and to form a particularly effective gas and humidity barrier.
Il présente de plus une excellente résistance aux chocs et aux manipulations diverses, depuis son lieu de fabrication jusqu'à sa consommation et il est pelable, ce qui en facilite l'ouverture. Il s'applique en outre sans former de plis, ce qui constitue une garantie d'étanchéité, il se soude à basse température sur la plupart des supports, et il est facilement recyclable. It also has excellent impact resistance and various handling, from its place of manufacture to its consumption and it is peelable, which facilitates opening. It is also applied without forming folds, which constitutes a seal guarantee, it is welded at low temperature on most supports, and it is easily recyclable.
Grâce à ses caractéristiques, le film d'operculage selon l'invention permet de réaliser des conditionnements sous vide poussé, offrant ainsi l'avantage remarquable d'améliorer considérablement la durée de conservation des produits qu'il sert à conditionner, permettant de porter à environ 45 jours leur conservabilité en chaîne de froid positif (de 0 C à + 5 C), alors que cette conservabilité n'excède pas 10 jours avec les films actuellement mis en oeuvre. Thanks to its characteristics, the sealing film according to the invention makes it possible to produce packaging under high vacuum, thus offering the remarkable advantage of considerably improving the shelf life of the products which it serves to package, making it possible to bring to about 45 days their shelf life in positive cold chain (from 0 C to + 5 C), while this shelf life does not exceed 10 days with the films currently used.
On trouvera ci-après un exemple de réalisation d'un film d'operculage selon l'invention, fourni à titre purement illustratif, étant entendu que cet exemple ne présente aucun caractère limitatif vis à vis de l'invention. An exemplary embodiment of a sealing film according to the invention, provided purely by way of illustration, is given below, it being understood that this example has no limiting character with respect to the invention.
EXEMPLE
On réalise un film d'operculage selon l'invention, de 90 microns d'épaisseur, en coextrudant à 210 C les cinq couches ci-après - couche extérieure: "SURLYN 1802" d'épaisseur 52u - liant extérieur : "BYNEL 4125" d'épaisseur 6p - couche barrière : "SOARNOL 4403" d'épaisseur 10p - liant intérieur : "BYNEL 4125" d'épaisseur su - couche de scellabilité : "LOTRYL 20MA" d'épaisseur 17p.EXAMPLE
A sealing film according to the invention, 90 microns thick, is produced by coextruding at 210 ° C. the following five layers - outer layer: "SURLYN 1802" of thickness 52u - outer binder: "BYNEL 4125" 6p thick - barrier layer: "SOARNOL 4403" 10p thick - interior binder: "BYNEL 4125" su su - sealable layer: "LOTRYL 20MA" 17p thick.
Ce film, chauffé à environ 100" C, peut être appliqué sur les bords d'un contenant dans lequel on a prélablement fait le vide, permettant de réaliser un operculage particulièrement solide et efficace. La durée de conservation du produit ainsi conditionné est d'environ 45 jours en chaîne de froid positif. This film, heated to around 100 "C, can be applied to the edges of a container in which a vacuum has been previously created, allowing a particularly solid and effective sealing to be carried out. The shelf life of the product thus conditioned is about 45 days in a positive cold chain.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9206463A FR2696998B1 (en) | 1992-05-22 | 1992-05-22 | Lidding film intended in particular for vacuum packaging of food products. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9206463A FR2696998B1 (en) | 1992-05-22 | 1992-05-22 | Lidding film intended in particular for vacuum packaging of food products. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2696998A1 true FR2696998A1 (en) | 1994-04-22 |
| FR2696998B1 FR2696998B1 (en) | 1995-01-06 |
Family
ID=9430221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9206463A Expired - Fee Related FR2696998B1 (en) | 1992-05-22 | 1992-05-22 | Lidding film intended in particular for vacuum packaging of food products. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2696998B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4254169A (en) * | 1978-12-28 | 1981-03-03 | American Can Company | Multi-layer barrier film |
| EP0251769A2 (en) * | 1986-06-30 | 1988-01-07 | W.R. Grace & Co.-Conn. | Oxygen barrier film |
| EP0334291A2 (en) * | 1988-03-25 | 1989-09-27 | Viskase Corporation | Meat adherable cook-in shrink film |
| EP0217252B1 (en) * | 1985-09-30 | 1991-11-13 | W.R. Grace & Co.-Conn. | Thermoplastic multi-layer packaging film and bags made therefrom |
-
1992
- 1992-05-22 FR FR9206463A patent/FR2696998B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4254169A (en) * | 1978-12-28 | 1981-03-03 | American Can Company | Multi-layer barrier film |
| EP0217252B1 (en) * | 1985-09-30 | 1991-11-13 | W.R. Grace & Co.-Conn. | Thermoplastic multi-layer packaging film and bags made therefrom |
| EP0251769A2 (en) * | 1986-06-30 | 1988-01-07 | W.R. Grace & Co.-Conn. | Oxygen barrier film |
| EP0334291A2 (en) * | 1988-03-25 | 1989-09-27 | Viskase Corporation | Meat adherable cook-in shrink film |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2696998B1 (en) | 1995-01-06 |
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