Abstract: The present invention relates to an improved process for preparing an aqueous dispersion of lignin and the use of said suspension in the preparation of a resin.
Abstract: The present invention relates to a method for preparing a surface-treated fibrous material comprising nanocellulose, in which a fibrous material is surface treated with an organic acid or salt thereof. Fibrous materials as such are also provided. The present technology allows improved Water Vapor Transmission Rates (WVTR) for the fibrous material, while operating on an industrial scale.
Type:
Application
Filed:
December 20, 2019
Publication date:
March 10, 2022
Applicant:
Stora Enso OYJ
Inventors:
Isto Heiskanen, Katja Lyytikäinen, Otto Nylén, Kaj Backfolk
Abstract: The invention discloses a paperboard comprising a base ply, a top ply, and an intermediate layer disposed in-between the at least one base ply and the top ply. The intermediate layer comprises pigment and microfibrillated cellulose (MFC). The application of an intermediate layer comprising pigment and MFC in-between the base ply and the top ply gives rise to improved optical properties of the paperboard, even when using an uncoated top ply having a low grammage. This makes it possible to reduce the grammage of top ply and still obtain good optical properties.
Type:
Application
Filed:
January 23, 2020
Publication date:
March 10, 2022
Applicant:
Stora Enso OYJ
Inventors:
Frank Peng, Kaj Backfolk, Isto Heiskanen, Teija Laukala
Abstract: Method for purchasing a product with a packaging from a smart fridge and recycle the packaging, wherein the method comprising the steps of identifying the consumer, unlocking a door of the smart fridge, opening the door, closing and locking the door, running a system inventory round in to detect which product that has been picked out from the smart fridge by the consumer, and charging the cost for the product from the consumer's payment account and sending a receipt to the mobile device. The invention is characterized in that the method further comprising the steps of placing the RFID tagged packaging in a smart recycling bin, detecting the RFID tag of the packaging via an RFID reader at the recycling bin, connecting the packaging to the consumer, and refunding the consumer for placing the product packaging in the recycling bin.
Abstract: The present invention relates to an improved process for manufacturing an extruded composite product comprising natural fibers and a thermoplastic polymer. According to the present invention, mixing as well as crosslinking takes place inside an extruder. The natural fibers may be provided for example in the form of pulp or wood particles.
Type:
Grant
Filed:
December 12, 2018
Date of Patent:
March 8, 2022
Assignee:
Stora Enso OYJ
Inventors:
Duncan Mayes, Janne Pynnönen, Antti Korpela
Abstract: A film comprising microfibrillated cellulose, nanoparticles, and a retention polymer. The nanoparticles are nanosilica nanoparticles that are anionic at neutral or alkaline pH and have at least one dimension less than 100 nm; and the retention polymer is starch. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a retention polymer.
Type:
Application
Filed:
November 9, 2021
Publication date:
March 3, 2022
Applicant:
Stora Enso OYJ
Inventors:
Kaj Backfolk, Isto Heiskanen, Esa Saukkonen
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.
Type:
Grant
Filed:
June 12, 2019
Date of Patent:
February 15, 2022
Assignee:
Stora Enso OYJ
Inventors:
Åsa Nyflött, Chris Bonnerup, Magnus Ekberg
Abstract: The present invention relates to a process for improving the strechability of films comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the oxygen barrier properties. According to the present invention, a film is formed from a suspension comprising microfibrillated cellulose having a broad size distribution.
Abstract: A sheet having dead-fold properties, wherein said sheet comprises cellulose fibers whereof at least 75%, preferably at least 90%, or more preferably at least 95% of said cellulose fibers have a fiber length of less than 1 mm, and wherein the tensile strength ratio (MD/CD) of the film is above 1.4, preferably higher than 1.6 and most preferably higher than 1.8.
Abstract: The invention relates to a method and an apparatus for deep-drawing a tray (1) from a blank of sheet material (2). The blank is provided with score lines, which determine the location of wrinkles formed in the process. The apparatus comprises a female moulding tool (3), which comprises a cavity (7) for forming the tray bottom outwardly, a male moulding tool (4), which comprises a plunger (11) for forming the tray bottom inwardly, the plunger being movable with respect to the cavity for forming the tray, and clamps (6, 15) with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools (3, 4) from the sheet material leeway is pro-vided for free forming so that wrinkling of the tray side walls is achieved in a controlled manner. Spacer plates (13) may be positioned behind the plunger (11), to adjust its position in relation to the cavity (7) of the female moulding tool (3).
Type:
Grant
Filed:
October 8, 2015
Date of Patent:
February 8, 2022
Assignee:
Stora Enso OYJ
Inventors:
Jari Räsänen, Kimmo Nevalainen, Henry Lindell, Panu Tanninen, Sami Matthews, Mari Hiltunen, Outi Kylliainen
Abstract: The present invention relates to a process for lignin dissolution in which partial methylolation of lignin is carried out during the step of preparing a solution of lignin in an aqueous medium comprising alkali and phenol. The lignin prepared according to the process of the present invention can be used to manufacture lignin-based phenolic resins, which are particularly useful in the manufacture of laminates.
Type:
Application
Filed:
November 26, 2019
Publication date:
February 3, 2022
Applicant:
Stora Enso OYJ
Inventors:
Ben Nasli Bakir, Ashar Zafar, Jesper Ekström
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 <70 wt %, based on the dry solid content of the respective layer, and wherein the grammage of each of the first and second coating layer and of the first and second barrier coating layer is in a range from >1 g/m2 to <10 g/m2.
Type:
Application
Filed:
December 9, 2019
Publication date:
January 27, 2022
Applicant:
Stora Enso OYJ
Inventors:
Åsa Nyflött, Chris Bonnerup, Magnus Ekberg
Abstract: The present invention relates to fractionation of crude tall oil, which originates from the Kraft process black liquor. In the method, according to the present invention, simulated moving bed (SMB) chromatography is used to efficiently separate fractions from the crude tall oil.
Abstract: The present invention relates to a method for hydrophobizing a cellulose substrate (1), which comprising a first side and a second side, which faces away from the first side, the method comprising the steps of: —drying the cellulose substrate to a dry content above 80%, preferably above 85%; —providing a fatty acid halide in spray form; —converting said fatty acid halide in spray form into vaporized fatty acid halide; and —guiding said vaporized fatty acid halide to contact the first side of the cellulose substrate, and at least partially penetrate the cellulose substrate.
Abstract: A surface treatment composition comprising nanocellulose—such as microfibrillated cellulose (MFC)—and particles is provided. The particles comprise a supporting material and an active material comprising a salt of a multivalent metal. Various products comprising such a surface treatment composition and methods using said compositions are also provided.
Abstract: The present invention provides a book paper suitable for both inkjet and offset printing. The inventive printing paper comprises a base substrate with a grammage of below 100 gsm comprising at least 50 wt % mechanical cellulosic pulp fibers and having a total filler content of below 15 wt %. The substrate is surface treated with a composition comprising pigments in a range of 15-30 wt %, starch in a range of 20-40 wt %, latex in a range of 10-20 wt % and a multivalent metal salt in a range of 10-30 wt %.
Type:
Application
Filed:
October 30, 2019
Publication date:
January 6, 2022
Applicant:
Stora Enso OYJ
Inventors:
Juhani Hyytiäinen, Raino Kauppinen, Antti Outinen
Abstract: The present invention relates to a method for hydrophobizing a cellulose substrate, which comprises a first side and a second side, which faces away from the first side, wherein the method comprising the steps of:—drying the cellulose substrate to a dry content above 80%, preferably above 85%;—providing a fatty acid halide in spray form; and—guiding said fatty acid halide in spray form to contact the first side of the cellulose substrate, and at least partially penetrate the cellulose substrate.
Abstract: The present invention relates to a paper or paperboard comprising a polymeric coating, said polymeric coating comprising: a first coating layer attached to the paper or paperboard surface, said first coating layer comprising a blend of: a high density polyethylene (HDPE), medium density polyethylene (MDPE) or linear low density polyethylene (LLDPE), or a mixture thereof, and a low density polyethylene (LDPE); and a second coating layer attached to the first coating layer, said second coating layer consisting essentially of a low density polyethylene (LDPE); wherein the first and second coating layers have a combined grammage of less than 12 g/m2. The present invention relates to a method for manufacturing a polyethylene (PE) coated paper or paperboard substrate.
Type:
Application
Filed:
October 1, 2019
Publication date:
January 6, 2022
Applicant:
Stora Enso OYJ
Inventors:
Ville Ribu, Kimmo Nevalainen, Juuso Toriseva, Esa Suokas, Jurkka Kuusipalo
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 grafted with a fatty acid halide; and a polymer layer disposed on the at least one surface of the MFC layer which has been grafted with a fatty acid halide. The present invention further relates to a paper or paperboard based packaging material,containersand cartonblanks comprising the gas barrier film, and to a method for manufacturing the gas barrier film.
Abstract: The present invention relates to an improved process for preparing an aqueous dispersion of lignin and the use of said suspension in the preparation of a resin.