MXPA98001669A - Coatressed 3 layer film for food packaging - Google Patents
Coatressed 3 layer film for food packagingInfo
- Publication number
- MXPA98001669A MXPA98001669A MXPA/A/1998/001669A MX9801669A MXPA98001669A MX PA98001669 A MXPA98001669 A MX PA98001669A MX 9801669 A MX9801669 A MX 9801669A MX PA98001669 A MXPA98001669 A MX PA98001669A
- Authority
- MX
- Mexico
- Prior art keywords
- polyethylene
- polyethylenes
- dicarboxylic acid
- acid anhydride
- range
- Prior art date
Links
- 235000013305 food Nutrition 0.000 title claims abstract description 7
- 238000004806 packaging method and process Methods 0.000 title claims abstract description 7
- 239000004698 Polyethylene (PE) Substances 0.000 claims abstract description 27
- 239000010410 layer Substances 0.000 claims abstract description 27
- -1 polyethylene Polymers 0.000 claims abstract description 27
- 229920000573 polyethylene Polymers 0.000 claims abstract description 27
- 239000000203 mixture Substances 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 claims abstract description 12
- 229920001577 copolymer Polymers 0.000 claims abstract description 11
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 8
- 239000005977 Ethylene Substances 0.000 claims abstract description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 6
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 5
- FPYJFEHAWHCUMM-UHFFFAOYSA-N Maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004677 Nylon Substances 0.000 claims abstract description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229920001778 nylon Polymers 0.000 claims abstract description 4
- 239000011229 interlayer Substances 0.000 claims abstract description 3
- 239000002985 plastic film Substances 0.000 claims abstract 6
- 239000004700 high-density polyethylene Substances 0.000 claims abstract 2
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract 2
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract 2
- 239000004711 α-olefin Substances 0.000 claims abstract 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-Hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 claims description 4
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-Octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 claims description 4
- 150000008064 anhydrides Chemical class 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000976 ink Substances 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 1
- 239000003000 extruded plastic Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-O oxonium Chemical compound [OH3+] XLYOFNOQVPJJNP-UHFFFAOYSA-O 0.000 description 1
Abstract
The present invention relates to the improved composition of a multilayer plastic film (3 layers) with oxygen and moisture barrier properties as well as acceptable inter-layer adhesion for use in food packaging. Said film is composed of 3 layers: a central layer of polar resin debarrera to the oxygen adhered to two external layers based on mixtures of polyethylene with polyethylene containing low grafting levels of an unsaturated dicarboxylic acid anhydride. The polar barrier resin is preferably a polycarboxylamide (Nylon) or an ethylene / vinyl alcohol copolymer (EVOH). The polyethylenes can be low or high density polyethylenes (LDPE or HDPE) or copolymers of ethylene with alpha-olefins (LLDPE). the dicarboxylic acid anhydride is preferably maleic anhydride
Description
COATED 3-LAYER FILM FOR FOOD PACKAGING
D E S C R I N C: The present invention relates to the improved composition of a 3-layer co-extruded plastic film with oxygen and water vapor barrier properties, good inter-layer adhesion and ease of application of printing inks on its surface. Said film is particularly effective for the packaging of foods that require protection from oxygen and moisture to increase shelf life. This film for food packaging is made by the coextrusion process and consists of three layers of resins: a central layer of oxygen barrier resin and two outer layers of water vapor barrier resins. For example, the oxygen barrier core layer can be a resin selected from the group of polycarboxylamides (Nylon) (I) or ethylene / vinyl alcohol copolymers (EVOH) (II) and the two external moisture barrier layers composed of polyethylene blends. (III) with polyethylene grafted with unsaturated dicarboxylic acid anhydride (IV). The polyethylenes being either low or high density or copolymers of ethylene with l-butene, l-hexene or 1-octene and the unsaturated dicarboxylic acid anhydride preferably a maleic anhydride. The composition of the polyethylene mixture of the outer layers consists essentially of 50 to 95% by weight of (III) with 5 to 50% by weight of (IV). Where (III) is formed by a polyethylene selected from the group consisting of low density, high density polyethylenes or copolymers of ethylene with 1-butene, 1-hexene or 1-octene having a density in the range of 0.912 to 0.965 and an index of fluidity in the range of 0.5 to 4.0 g / lOmin. On the other hand (IV) is formed by a modified polyethylene which can be a low density polyethylene, high density or copolymer of ethylene with 1-butene, 1-hexene or 1-octene having a density in the range of 0.912 to 0.965 and an index of fluidity between 0.5 to 4.0 g / 10min., which has been modified by grafting an unsaturated dicarboxylic acid anhydride, containing 0.1 to 0. 0% by weight of said anhydride in the composition. The total thickness of the film is in the range of 45 to 135 microns and the thickness of each layer varies between 5 and 25 microns for the central layer and between 20 and 55 microns for each of the outer layers.
The total content of the oxygen (I) or (II) barrier resin varies between 10 and 25% by weight and of the moisture barrier resins formed by the mixture of (III) and (IV), between 75 and 90% by weight.
Claims (4)
- The oxygen barrier core layer can be a resin selected from the group of polycarboxylamides (Nylon) (I) or ethylene / vinyl alcohol copolymers (EVOH) (II).
- 2. - An improved plastic film as defined in claim 1, in which the improvement consists in using mixtures of polyethylene resins with polyethylenes modified with unsaturated dicarboxylic acid anhydride in the outer layers of the film, where the polyethylenes (III and IV) ) are of high density having a density in the range of 0.94 to 0.965 and a flow index in the range of 0.5 to 4.0 g lOmin.
- 3. - An improved plastic film as defined in claim 1, in which the improvement consists in using mixtures of polyethylene resins with polyethylenes modified with unsaturated dicarboxylic acid anhydride in the outer layers of the film, where the polyethylenes (III and IV) ) are copolymers of ethylene with 1-butene, 1-hexene or 1-octene with a density in the range of 0.916 to 0.965 and a melt index in the range of 0.5 to 4.0 g / lOmin.
- 4. - An improved plastic film as defined in claim 1, wherein the improvement consists in using mixtures of polyethylene resins with polyethylenes modified with unsaturated dicarboxylic acid anhydride in the outer layers of the film, where the polyethylenes (III and IV) ) are mixtures of low density polyethylene, high density or copolymers of ethylene with 1-butene, 1-hexene or 1-octe not having a density in the range of 0.912 to 0.965 and a flow index between 0.5 to 4.0 g / lOmin . R E S U M E N: The present invention relates to the improved composition of a multilayer plastic film (3 layers) with oxygen and moisture barrier properties as well as acceptable interlayer adhesion for use in food packaging. Said film is composed of 3 layers: a central layer of oxygen barrier polar resin adhered to two outer layers based on mixtures of polyethylene with polyethylene containing low grafting levels of an unsaturated dicarboxylic acid anhydride. The polar barrier resin is preferably a polycarboxylamide (Nylon) or an ethylene / vinyl alcohol copolymer (EVOH). The polyethylenes can be low or high density polyethylenes (LDPE or HDPE) or copolymers of ethylene with α-olefins (LLDPE). The dicarboxylic acid anhydride is preferably maleic anhydride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MXPA/A/1998/001669A MXPA98001669A (en) | 1995-10-24 | Coatressed 3 layer film for food packaging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MXPA/A/1998/001669A MXPA98001669A (en) | 1995-10-24 | Coatressed 3 layer film for food packaging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MX9801669A MX9801669A (en) | 1998-06-28 |
| MXPA98001669A true MXPA98001669A (en) | 1998-10-30 |
Family
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