Polymer-coated heat-sealable packaging material, method for manufacturing the same and a closed package made thereof

The invention relates to a manufacturing method of a heat-sealable packaging material, a polymer-coated packaging material manufactured using the method, and a sealed package to be manufactured of the material. The packaging material comprises a fibre base, such as a packaging board, and an inner, e...

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Main Authors Penttinen, Tapani, Nevalainen, Kimmo, Järvinen, Jalliina
Format Patent
LanguageEnglish
Published 26.02.2008
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Abstract The invention relates to a manufacturing method of a heat-sealable packaging material, a polymer-coated packaging material manufactured using the method, and a sealed package to be manufactured of the material. The packaging material comprises a fibre base, such as a packaging board, and an inner, extruded water vapour barrier layer on both sides, containing high-density polyethylene (HDPE), and an outer heat sealing layer, the material of which is, for example, low-density polyethylene (LDPE). Further, polymeric oxygen barrier layers can be incorporated in the packaging material, the material of the oxygen barrier layers being, for example, ethyl vinyl alcohol copolymer (EVOH) or polyamide (PA). With the HDPE layer, the permeation of water vapour is prevented to both directions, and the location of the extruded layers on both sides of the fibre base reduces the curling of the material. The packages according to the invention comprise carton, box and bag packages for dry and liquid foods.
AbstractList The invention relates to a manufacturing method of a heat-sealable packaging material, a polymer-coated packaging material manufactured using the method, and a sealed package to be manufactured of the material. The packaging material comprises a fibre base, such as a packaging board, and an inner, extruded water vapour barrier layer on both sides, containing high-density polyethylene (HDPE), and an outer heat sealing layer, the material of which is, for example, low-density polyethylene (LDPE). Further, polymeric oxygen barrier layers can be incorporated in the packaging material, the material of the oxygen barrier layers being, for example, ethyl vinyl alcohol copolymer (EVOH) or polyamide (PA). With the HDPE layer, the permeation of water vapour is prevented to both directions, and the location of the extruded layers on both sides of the fibre base reduces the curling of the material. The packages according to the invention comprise carton, box and bag packages for dry and liquid foods.
Author Järvinen, Jalliina
Nevalainen, Kimmo
Penttinen, Tapani
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References (507094) 19980300
(0276018) 19880700
(WO9702140) 19970100
Salste et al. (6383582) 20020500
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Laiho et al. (5993977) 19991100
(0 276 018) 19880700
Aho et al. (6531196) 20030300
(8-134800) 19960500
Marano et al. (5712006) 19980100
Aho et al. (6787205) 20040900
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