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公开(公告)号：US11247443B2
公开(公告)日：2022-02-15
申请号：US17251363
申请日：2019-06-12
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
摘要： The invention relates to a packaging material comprising: a paperboard substrate comprising a first and a second side, at least one barrier layer applied on the first side of the substrate, the barrier layer comprising a water-soluble polymer selected from the group of polyvinyl alcohol, a copolymer of ethylene and polyvinyl alcohol, starch, carboxymethylcellulose and combinations thereof in an amount of at least 50 weight %, based on the dry weight of the barrier layer, an extrusion coated layer of a polyolefin on the barrier layer, and at least one dispersion barrier layer applied on the second side of the substrate, which at least one dispersion barrier layer forms a printing surface of the packaging material. The invention further relates to a method of manufacturing a respective packaging material.
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公开(公告)号：US20230219732A1
公开(公告)日：2023-07-13
申请号：US17999062
申请日：2021-05-18
申请人： Stora Enso OYJ
发明人： Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
摘要： The invention discloses a method for producing a packaging material and a packaging material suitable for packaging of food and/or liquid. In the method of the invention a first barrier layer, and an optional second barrier layer, is applied on a first side of a paperboard web. The thereby formed barrier coated web is at least partly dried in a first drying step, whereupon an extruded layer is applied onto the partly dried barrier coated web in a second coating step. In accordance with the invention, the first and second coating steps are applied integrated within the same coating line. The application of a first barrier layer and an extrusion coated layer in the same coating line in accordance with the invention has shown to give rise to a packaging material with remarkably good barrier properties, especially gas-, liquid and/or grease barrier properties, for the packaging of food and/or liquid.
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公开(公告)号：US11486095B2
公开(公告)日：2022-11-01
申请号：US16958249
申请日：2018-12-20
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
IPC分类号： D21H21/16 , D21H19/22 , D21H19/38 , D21H19/40 , D21H19/56 , D21H19/82 , D21H19/84 , D21H27/10
摘要： The present invention discloses a paperboard for packaging of liquid and frozen food, comprising a dispersion coating as the only barrier layer on its outside/print side. It has surprisingly been found that a dispersion coating comprising latex and pigment applied on the outside/print side of a paperboard for liquid and/or frozen food may serve as the only barrier against moisture arising from condensation.
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公开(公告)号：US20210245481A1
公开(公告)日：2021-08-12
申请号：US17251363
申请日：2019-06-12
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
摘要： The invention relates to a packaging material comprising: a paperboard substrate comprising a first and a second side, at least one barrier layer applied on the first side of the substrate, the barrier layer comprising a water-soluble polymer selected from the group of polyvinyl alcohol, a copolymer of ethylene and polyvinyl alcohol, starch, carboxymethylcellulose and combinations thereof in an amount of at least 50 weight %, based on the dry weight of the barrier layer, an extrusion coated layer of a polyolefin on the barrier layer, and at least one dispersion barrier layer applied on the second side of the substrate, which at least one dispersion barrier layer forms a printing surface of the packaging material. The invention further relates to a method of manufacturing a respective packaging material.
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公开(公告)号：US11952720B2
公开(公告)日：2024-04-09
申请号：US17312092
申请日：2019-12-09
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
IPC分类号： D21H27/10 , C09D109/10 , D21H17/00 , D21H19/82
CPC分类号： D21H19/826 , C09D109/10 , D21H17/74 , D21H27/10
摘要： The invention relates to a heat-sealable packaging material comprising: a paperboard substrate comprising a first side and a second side, a first coating layer on the first side, a first barrier coating layer on the first coating layer, which first barrier coating layer comprises pigments, a second coating layer on the second side, and a second barrier coating layer on the second coating layer, which second barrier coating layer comprises pigments, wherein the coating layers and the barrier coating layers comprise a latex or a water-soluble polymer, wherein the first coating layer and the second coating layer are free of pigments, wherein the first barrier coating layer and the second barrier coating layer comprise pigments in an amount in a range from >40 wt % to 1 g/m2 to
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公开(公告)号：US20230212825A1
公开(公告)日：2023-07-06
申请号：US17999060
申请日：2021-05-18
申请人： Stora Enso OYJ
发明人： Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
IPC分类号： D21H27/10 , D21H19/82 , D21H19/22 , D21H19/12 , D21H23/64 , D21H23/50 , D21H23/72 , B32B27/10 , B32B27/32 , B32B37/24 , B32B38/00 , B65D65/40 , B65D65/42
CPC分类号： D21H27/10 , D21H19/824 , D21H19/22 , D21H19/12 , D21H23/64 , D21H23/50 , D21H23/72 , B32B27/10 , B32B27/32 , B32B37/24 , B32B38/164 , B65D65/40 , B65D65/42 , B32B2307/7265 , B32B2255/12 , B32B2307/718 , B32B2307/31 , B32B2307/7246 , B32B2307/7244 , B32B2255/26 , B32B2250/40 , B32B2037/243 , B32B2317/12 , B32B2439/70
摘要： The invention discloses a paperboard for packaging of a heat-sealable packaging material comprising: —a paperboard substrate comprising a first and a second side, —a first and an optional second dispersion coating layer on the first side, which first and optional second dispersion coating layer provides a barrier against at least one of liquid, moisture, grease and gas, —an extrusion coated barrier layer comprising a polyolefin, wherein the first and optional second dispersion coating layer is applied between the paperboard substrate and the extrusion coated barrier layer, and wherein the coat weight of the extrusion coated barrier layer is less than 15 gsm. The packaging material according of the invention minimizes the amount of plastic coating, but still provides the needed barrier properties for the packaging of food and/or liquid. The packaging material has especially been shown to provide a longer shelf life for food items packed in a packaging made from the material. Especially, the packaging material provides gas-, liquid and/or grease barrier properties. Although the packaging material comprises such low amount of extruded thermoplastic polymers, the material is readily heat-sealable.
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公开(公告)号：US20220162804A1
公开(公告)日：2022-05-26
申请号：US17425423
申请日：2020-01-24
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
IPC分类号： D21H19/82 , D21H19/22 , D21H19/62 , D21H19/76 , D21H19/84 , D21H19/40 , C09D109/08 , C09D123/14
摘要： The invention relates to a heat-sealable paperboard comprising a paperboard substrate (1) comprising a first side and a second side, a first dispersion coating layer (2) on the first side of the paperboard substrate (1), and a second dispersion coating layer (3) on the first dispersion coating layer (2), wherein the first dispersion coating layer (2) comprises a latex and pigment and the second dispersion coating layer (3) comprises a polyolefin.
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公开(公告)号：US20220025582A1
公开(公告)日：2022-01-27
申请号：US17312092
申请日：2019-12-09
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
IPC分类号： D21H19/82 , D21H27/10 , D21H17/00 , C09D109/10
摘要： The invention relates to a heat-sealable packaging material comprising: a paperboard substrate comprising a first side and a second side, a first coating layer on the first side, a first barrier coating layer on the first coating layer, which first barrier coating layer comprises pigments, a second coating layer on the second side, and a second barrier coating layer on the second coating layer, which second barrier coating layer comprises pigments, wherein the coating layers and the barrier coating layers comprise a latex or a water-soluble polymer, wherein the first coating layer and the second coating layer are free of pigments, wherein the first barrier coating layer and the second barrier coating layer comprise pigments in an amount in a range from >40 wt % to 1 g/m2 to
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公开(公告)号：US20200332469A1
公开(公告)日：2020-10-22
申请号：US16958249
申请日：2018-12-20
申请人： Stora Enso OYJ
发明人： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
IPC分类号： D21H21/16 , D21H19/40 , D21H19/22 , D21H19/56 , D21H19/38 , D21H19/82 , D21H19/84 , D21H27/10
摘要： The present invention discloses a paperboard for packaging of liquid and frozen food, comprising a dispersion coating as the only barrier layer on its outside/print side. It has surprisingly been found that a dispersion coating comprising latex and pigment applied on the outside/print side of a paperboard for liquid and/or frozen food may serve as the only barrier against moisture arising from condensation.
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