公开(公告)号：US10683616B2

公开(公告)日：2020-06-16

申请号：US16067985

申请日：2017-01-05

Applicant: Stora Enso OYJ

Inventor： Philip Håkansson ,  Isto Heiskanen

IPC: D21H23/04 ,  D21H17/67 ,  D21H27/18 ,  C01F11/18 ,  D21H23/14 ,  D21H11/18 ,  D21H17/25 ,  D21H17/69 ,  D21H21/18

Abstract: The invention provides a method for the production of a composite comprising microfibrillated cellulose (MFC) and precipitated calcium carbonate. The method is characterized in that MFC is added to a suspension of calcium hydroxide during carbonation, whereby calcium carbonate is precipitated onto fibers or fibrils of the MFC in a controlled manner. By adding microfibrillated cellulose to the calcium suspension during the carbonation, the brightness and the strength of the MFC/PCC-composite is enhanced. Moreover, the inventive method facilitates the distribution of calcium dioxide and MFC in the suspension and thus gives rise to a more homogenous product.

公开(公告)号：US10676868B2

公开(公告)日：2020-06-09

申请号：US15759089

申请日：2016-09-16

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Kaj Backfolk ,  Esa Saukkonen ,  Nina Ruohoniemi ,  Katja Lyytikainen

IPC: D21H11/18 ,  D21H21/20 ,  B29D7/01 ,  C08J5/18 ,  D21C9/00 ,  D21H11/20

Abstract: The present invention relates to a method for manufacturing a film having an oxygen transmission rate in the range of from 1 cc/m2/24 h to 500 cc/m2/24 h according to ASTM D-3985, at a relative humidity of more than 50% at 25° C., or higher than 75% at 25° C., or higher than 85% at 25° C., wherein the method comprises the steps of: providing a first suspension comprising a microfibrillated cellulose, wherein the dry content of the suspension is in the range of from 0.1 to 10% by weight, adding a wet strength additive to said first suspension, at an amount of from 0.1 to 10 weight-% based on the amount of microfibrillated cellulose (dry/dry), thereby forming a mixture of the microfibrillated cellulose and the wet strength additive, applying said mixture to a substrate to form a fibrous web and drying said web to form said film. The present invention also relates to a film produced according to the method.

公开(公告)号：US10577805B2

公开(公告)日：2020-03-03

申请号：US15537039

申请日：2015-12-14

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Duncan Mayes ,  Simo Siitonen

IPC: E04F13/02 ,  C09D101/02 ,  D21H11/18 ,  C04B26/28 ,  D21H27/20 ,  C09D197/02 ,  B05D1/02 ,  D21H27/18

Abstract: The present invention relates to a method for applying a wallpaper material onto a surface comprising the steps of providing a liquid suspension comprising cellulosic fibers wherein at least part of said cellulosic fibers comprises microfibrillated cellulose and wherein said liquid suspension has a dry content of at least 10% by weight, applying at least one layer of said liquid suspension onto the surface, drying said liquid suspension layer after it has been applied onto the surface, and thereby forming a dry fiber web layer, wherein said fiber web layer forms said wallpaper material.

公开(公告)号：US20200023627A1

公开(公告)日：2020-01-23

申请号：US16471983

申请日：2017-12-21

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Esa Saukkonen

IPC: B32B29/02 ,  D21C9/18

Abstract: The present invention relates to a method for the production of a coated paper, paperboard or film, wherein the method comprises the steps of; providing a first suspension comprising cellulose fibers, applying the first suspension on a substrate to form a fibrous web, wherein the web has a first and a second side, providing a second suspension comprising micro fibrillated cellulose, applying the second suspension either to the first side of the fibrous web or to a surface of a drying equipment and conducting said fibrous web through the drying equipment whereby the second suspension is added to the first side of the web forming the coated paper, paperboard or film. The invention also relates to a paper, paperboard or film produced according to the method.

公开(公告)号：US20190291938A1

公开(公告)日：2019-09-26

申请号：US16316729

申请日：2017-07-03

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen ,  Seppo Lampainen ,  Simo Siitonen ,  Marianne Andersson

IPC: B65D81/26 ,  A23B7/157 ,  A23L3/358 ,  B01J20/32 ,  B01J20/28 ,  B01J20/30 ,  B01J20/02 ,  B65D65/42 ,  D21H21/22 ,  D21H19/02 ,  C08L1/02

Abstract: The present invention relates to a material suitable for use in packages comprising nano-sized cellulose and an ethylene scavenging or ethylene absorbing agent. The invention also relates to methods for manufacturing such material, which may be paper, label, paperboard, plastic or film products.

公开(公告)号：US20190276619A1

公开(公告)日：2019-09-12

申请号：US16345994

申请日：2017-10-31

Applicant: Stora Enso OYJ

Inventor： Esa Saukkonen ,  Isto Heiskanen ,  Kaj Backfolk ,  Ville Ribu

IPC: C08J5/18 ,  D21H11/18 ,  D21H25/04

Abstract: A method of forming a film comprising nanocellulose having an Oxygen Transmission Rate (OTR) value in the range of 0.1 to 300 cc/m2/24 h at 38° C. and 85% relative humidity (RH), and having a basis weight in the range of in the range of 0.1 to 45 g/m2 wherein the method comprises the steps of; providing a suspension comprising nanocellulose, forming at least one layer of a web or a film from said suspension; drying said formed web or film to a dry content of at least 65 weight-%, wherein said method further comprises the steps of; treating at least one side of said dewatered and dried web or film with ultra violet (UV) or electron beam (EB) irradiation; and wherein at least one cooling step is provided in connection with or after the UV or EB treatment step.

公开(公告)号：US20190264394A1

公开(公告)日：2019-08-29

申请号：US16345348

申请日：2017-10-27

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: D21H11/18 ,  D21H21/06 ,  D21H23/04

Abstract: The invention discloses a method to enable the efficient use of surfactants in web forming of a cellulose containing material, e.g. in the making of paper or paperboard. The method comprises the addition of microfibrillated cellulose (MFC) or nanocrystalline cellulose (NCC) to the white water in a web-forming process in order to form complexes with surface active agents. The formed complexes are at least partly recycled to the process. This enables the producer to have control over the concentration of surface active agents in the system.

公开(公告)号：US20190234020A1

公开(公告)日：2019-08-01

申请号：US16312449

申请日：2017-06-20

Applicant: Stora Enso OYJ

Inventor： Kaj Backfolk ,  Isto Heiskanen ,  Esa Saukkonen

IPC: D21H15/10 ,  D21H17/68 ,  D21H17/24 ,  D21H21/06 ,  D21H19/22 ,  D21H19/82 ,  D21F1/10 ,  D21G1/00 ,  D21H27/10 ,  B32B27/32 ,  B32B27/10

CPC classification number: D21H15/10 ,  B32B27/10 ,  B32B27/32 ,  B32B29/00 ,  B32B2250/02 ,  B32B2262/062 ,  B32B2307/7244 ,  B32B2439/40 ,  B65D65/38 ,  B65D81/34 ,  D21F1/10 ,  D21G1/00 ,  D21H11/18 ,  D21H17/24 ,  D21H17/68 ,  D21H19/22 ,  D21H19/824 ,  D21H21/06 ,  D21H27/10 ,  D21H27/38

Abstract: The invention concerns a method of producing an MFC film comprising reinforcement fibers, which film show excellent oxygen barrier properties and is easy to handle. The method of manufacturing the film comprises the steps of: —providing a suspension comprising a first microfibrillated cellulose (MFC) in an amount of at least 50 weight %, reinforcement fibers in an amount of at least 5 weight %, all percentages calculated on the total solid content of said suspension, and a formation aid, —mixing said suspension to form a mixture, —forming a fibrous web from the mixture, and —dewatering and/or drying said fibrous web to form a film having a basis weight of less than 40 g/m2, a specific formation number of below 0.45 g0.5/m2, and an Oxygen Transmission Rate (OTR) value of below 100 ml/m2/per 24 hours, preferably of below 50 ml/m2 per 24 hours at 50% relative humidity. The invention further discloses a film and use of the film in food or liquid packaging applications.

公开(公告)号：US20190047273A1

公开(公告)日：2019-02-14

申请号：US16087281

申请日：2017-03-21

Applicant: Stora Enso OYJ

Inventor： Isto Heiskanen ,  Seppo Lampainen ,  Jukka Kankkunen

IPC: B32B29/08 ,  D21H11/18 ,  D21H17/16 ,  D21H17/17 ,  D21H17/25 ,  D21H21/16 ,  D21H21/18 ,  D21H27/10 ,  D21H27/38 ,  D21H27/40

Abstract: A corrugated fiberboard comprising cellulosic fibers, wherein said corrugated fiberboard has at least one of a geometrical tensile index in the range of from 32 to 65 Nm/g, a fracture toughness index in the range of from 4 to 24 Jm/kg, and a ring crush index in the range of from 5 to 10 Nm/g5 measured at relative humidity of 85% RH; wherein the cellulosic fibers comprises a mixture of less refined fibers having a Schopper-Riegler (SR) value in the range of 15 to 28 and microfibrillated cellulose fibers, wherein mixture comprises said microfibrillated cellulose in a range of from 1% to 5% by weight of the dry content of the cellulosic fibers.

公开(公告)号：US20180346813A1

公开(公告)日：2018-12-06

申请号：US15779131

申请日：2016-11-25

Applicant: STORA ENSO OYJ

Inventor： Kaj Backfolk ,  Elina Skerfe ,  Isto Heiskanen

IPC: C09K17/52 ,  C09K17/50 ,  A01G13/02

CPC classification number: A01G13/02 ,  C09K17/52 ,  D21H19/38 ,  D21H27/00

Abstract: The invention relates to a ground cover in the form of a mulch, comprising a paper substrate originating from fibre-bearing pulp, preferably emanating from lignocellulosic material, which has been web-formed or sheet-formed. Paper based mulches face problems with biodegradability and microbial attacks, mechanical strength and cost. The solution according to the invention is that the fibres have been coated with one or more minerals, e.g., calcium carbonate, and the mulch comprises one or more functional agents, e.g., a colorant. Further, the mineral coated onto or into the fibres predominantly show up when precipitated in the form of one or more metal carbonates.