公开(公告)号：US20190352854A1

公开(公告)日：2019-11-21

申请号：US16471990

申请日：2017-12-18

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Chris Bonnerup

IPC: D21H27/10 ,  D21H19/82 ,  D21H19/60 ,  D21H19/22 ,  B65D65/42

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.

公开(公告)号：US20230212825A1

公开(公告)日：2023-07-06

申请号：US17999060

申请日：2021-05-18

Applicant: Stora Enso OYJ

Inventor： Chris Bonnerup ,  Magnus Ekberg ,  Kaj Backfolk

IPC: 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 classification number: 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

Abstract: 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.

公开(公告)号：US20220162804A1

公开(公告)日：2022-05-26

申请号：US17425423

申请日：2020-01-24

Applicant: Stora Enso OYJ

Inventor： Åsa Nyflött ,  Chris Bonnerup ,  Magnus Ekberg

IPC: D21H19/82 ,  D21H19/22 ,  D21H19/62 ,  D21H19/76 ,  D21H19/84 ,  D21H19/40 ,  C09D109/08 ,  C09D123/14

Abstract: 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.

公开(公告)号：US20220025582A1

公开(公告)日：2022-01-27

申请号：US17312092

申请日：2019-12-09

Applicant: Stora Enso OYJ

Inventor： Åsa Nyflött ,  Chris Bonnerup ,  Magnus Ekberg

IPC: D21H19/82 ,  D21H27/10 ,  D21H17/00 ,  C09D109/10

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

公开(公告)号：US20200332469A1

公开(公告)日：2020-10-22

申请号：US16958249

申请日：2018-12-20

Applicant: Stora Enso OYJ

Inventor： Åsa Nyflött ,  Chris Bonnerup ,  Magnus Ekberg ,  Kaj Backfolk

IPC: D21H21/16 ,  D21H19/40 ,  D21H19/22 ,  D21H19/56 ,  D21H19/38 ,  D21H19/82 ,  D21H19/84 ,  D21H27/10

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.