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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
Applicant: Stora Enso OYJ
Inventor： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
Abstract: 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
Applicant: Stora Enso OYJ
Inventor： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
IPC: D21H27/10 , C09D109/10 , D21H17/00 , D21H19/82
CPC classification number: D21H19/826 , C09D109/10 , D21H17/74 , D21H27/10
Abstract: 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：US20240308741A1
公开(公告)日：2024-09-19
申请号：US18578479
申请日：2022-07-07
Applicant: Stora Enso OYJ
Inventor： Chris Bonnerup , Kaj Backfolk , Fredrik Werner
CPC classification number: B65D65/40 , B32B27/10 , B32B27/306 , B32B27/32 , B32B29/005 , B32B2255/10 , B32B2255/12 , B32B2255/205 , B32B2255/26 , B32B2255/28 , B32B2264/10 , B32B2307/718 , B32B2307/7244 , B32B2307/7246 , B32B2439/00 , B32B2553/00 , B65D2565/383 , B65D2565/387
Abstract: A paper or paperboard based packaging laminate comprising: a paper or paperboard base layer, a mineral coating layer, a PVOH coating layer, and a metallized film layer, wherein the mineral coating layer is arranged between and in contact with the base layer and the PVOH coating layer, and wherein the metallized film layer is laminated to the PVOH coating layer, and wherein the packaging laminate has an oxygen transfer rate (OTR), measured according to the standard ASTM F-1927 at 90% relative humidity and 38° C., of less than 5 cc/m2/day. Also a container with such a paper or paperboard based packaging laminate.
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公开(公告)号：US20240271368A1
公开(公告)日：2024-08-15
申请号：US18568432
申请日：2022-06-07
Applicant: Stora Enso OYJ
Inventor： Åsa Nyflött , Chris Bonnerup , Isabel Knöös , Anders Karlsson
IPC: D21H19/34 , C08J5/18 , C08J7/04 , C09D101/28 , C09D105/14 , D21H17/26 , D21H19/54
CPC classification number: D21H19/34 , C08J5/18 , C08J7/0427 , C09D101/286 , C09D105/14 , D21H17/26 , D21H19/54 , C08J2401/28 , C08J2403/04 , C08J2405/02 , C08J2405/04 , C08J2405/08 , C08J2405/14
Abstract: The present invention relates to an aqueous barrier coating composition comprising: 20-80% by weight of a dissolved first polysaccharide having a first degree of polymerization (DP1) of at least 150, based on the total solids content of the aqueous barrier coating composition; and 20-80% by weight of a dissolved second polysaccharide having a second degree of polymerization (DP2) of 100 or less, based on the total solids content of the aqueous barrier coating composition; wherein the ratio of DP1:DP2 is at least 10:1; and wherein the aqueous barrier coating composition has a total solids content in the range of 10-90% by weight.
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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
Applicant: Stora Enso OYJ
Inventor： Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20220340342A1
公开(公告)日：2022-10-27
申请号：US17595988
申请日：2020-06-25
Applicant: Stora Enso OYJ
Inventor： Isabel Knöös , Åsa Nyflött , Chris Bonnerup
Abstract: The present invention relates to a gas barrier film for a paper or paperboard based packaging material, said gas barrier film comprising: a microfibrillated cellulose layer (MFC layer), at least one surface of which has been metallized; and a polymer dispersion coating layer disposed on at least one surface of the MFC layer. The present invention further relates to a paper or paperboard based packaging material, containers and carton blanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.
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公开(公告)号：US20220372708A1
公开(公告)日：2022-11-24
申请号：US17755339
申请日：2020-11-04
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Chris Bonnerup , Isto Heiskanen , Katja Lyytikäinen
Abstract: A method for reducing the surface oil absorption of cellulose based substrate is provided, in which a coating composition is applied to said substrate; and in which the coating composition comprises carboxymethyl cellulose (CMC) and/or a salt of carboxymethyl cellulose (CMC). A coated paperboard, and a laminate of the coated paperboard with a polymer layer is also provided. The coating composition provides improved surface oil absorption and improved adherence of an overlying polymer layer.
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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
Applicant: Stora Enso OYJ
Inventor： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg , Kaj Backfolk
Abstract: 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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9.发明授权公开(公告)号：US11098452B2
公开(公告)日：2021-08-24
申请号：US16471990
申请日：2017-12-18
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Chris Bonnerup
Abstract: The invention relates to a method of manufacturing a heat-sealable packaging material, the method comprising the steps of: providing a paperboard substrate comprising a top ply, applying a first dispersion barrier layer on the top ply, wherein the first dispersion barrier layer comprises a latex having a first glass transition temperature, and applying a second dispersion barrier layer on the first barrier layer, wherein the second dispersion barrier layer comprises a latex having a second glass transition temperature, wherein the second glass transition temperature is higher than the first glass transition temperature, wherein the grammage of the second dispersion barrier layer is lower than the grammage of the first dispersion barrier layer, and wherein the second dispersion barrier layer comprises pigments. The invention further relates to a respective heat-sealable packaging material.
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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
Applicant: Stora Enso OYJ
Inventor： Åsa Nyflött , Chris Bonnerup , Magnus Ekberg
Abstract: 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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