-
公开(公告)号：US20220228319A1
公开(公告)日：2022-07-21
申请号：US17658308
申请日：2022-04-07
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
IPC: D21H11/18 , D21H13/08 , D21H13/10 , D21H17/28 , D21H17/33 , D21H17/68 , D21H21/10 , D21H21/18 , D21H21/52 , D21H23/48
Abstract: The present invention relates to a method for production of product comprising a first ply, the method comprising the steps of: providing a fibrous suspension comprising fibers; providing said fibrous suspension to a porous medium to form a substrate comprising fibers; providing a first additive suspension comprising a first strengthening agent, wherein the first strengthening agent is microfibrillated cellulose; providing a second additive suspension comprising at least one retention agent and/or at least one drainage agent; dewatering said substrate on said porous medium; performing additive addition to said substrate during said dewatering of said substrate on said porous medium, wherein the additive addition is performed when the substrate has a dry content of less than 20 weight-%, preferably less than 10 weight-%, most preferably less than 7 weight-%, and wherein the additive addition comprises adding at least a layer of said first additive suspension and a layer of said second additive suspension to said substrate by means of multilayer curtain coating, and further dewatering and drying said substrate after said dewatering on said porous medium so as to provide said first ply. The invention also relates to a paper, board or non-woven product obtainable by the method.
-
公开(公告)号：US11319672B2
公开(公告)日：2022-05-03
申请号：US16975786
申请日：2019-02-25
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
IPC: D21H11/18 , D21H13/08 , D21H13/10 , D21H17/28 , D21H17/33 , D21H17/68 , D21H21/10 , D21H21/18 , D21H21/52 , D21H23/48
Abstract: The present invention relates to a method for production of product comprising a first ply, the method comprising the steps of: providing a fibrous suspension comprising fibers; providing said fibrous suspension to a porous medium to form a substrate comprising fibers; providing a first additive suspension comprising a first strengthening agent, wherein the first strengthening agent is microfibrillated cellulose; providing a second additive suspension comprising at least one retention agent and/or at least one drainage agent; dewatering said substrate on said porous medium; performing additive addition to said substrate during said dewatering of said substrate on said porous medium, wherein the additive addition is performed when the substrate has a dry content of less than 20 weight-%, preferably less than 10 weight-%, most preferably less than 7 weight-%, and wherein the additive addition comprises adding at least a layer of said first additive suspension and a layer of said second additive suspension to said substrate by means of multilayer curtain coating, and further dewatering and drying said substrate after said dewatering on said porous medium so as to provide said first ply. The invention also relates to a paper, board or non-woven product obtainable by the method.
-
公开(公告)号：US20220064390A1
公开(公告)日：2022-03-03
申请号：US17454112
申请日：2021-11-09
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen
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.
-
公开(公告)号：US20200318293A1
公开(公告)日：2020-10-08
申请号：US16955928
申请日：2018-12-18
Applicant: Stora Enso OYJ
Inventor： Esa Saukkonen , Isto Heiskanen , Ville Ribu
Abstract: The present invention relates to a laminate having oxygen barrier properties, which laminate comprises; a porous fiber based layer comprising nanocellulose and cellulosic fibers wherein said fiber based layer has an air resistance of less than 4000 s/100 ml measured according to ISO5636/6 and a polymer layer attached to at least one side of said fiber based layer to form said laminate. The present invention further relates to a method to produce said laminate and a paper or paperboard product comprising the laminate and the use of the laminate.
-
Patent Agency Ranking
55.发明申请公开(公告)号：US20190292727A1
公开(公告)日：2019-09-26
申请号：US16316864
申请日：2017-07-03
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen , Heidi Saxell
Abstract: The present invention relates to a method for manufacturing an intermediate product that can be stored and transported and efficiently converted into microfibrillated cellulose with limited energy input at the time of conversion. More specifically, the invention involves the use of dewatered carboxymethylcellulose or carboxylated cellulose fiber having a low degree of substitution and a high amount of additives.
-
56.发明申请公开(公告)号：US20190248988A1
公开(公告)日：2019-08-15
申请号：US16314592
申请日：2017-06-27
Applicant: Stora Enso OYJ
Inventor： Isto Heiskanen , Esa Saukkonen , Kaj Backfolk
CPC classification number: C08L1/02 , C08J5/18 , C08J2301/02 , C08K5/0025 , C08L2203/16 , C08L2312/00 , C09D101/02 , D21F11/00 , D21H11/18 , F26B13/00
Abstract: The present invention relates to a method for the production of a film comprising microfibrillated cellulose, wherein the method comprises the steps of; providing a suspension comprising microfibrillated cellulose, applying the suspension on a substrate to form a fibrous web, wherein the web has a first and a second side, conducting the web to a contact drying equipment wherein the first side of said web is in direct contact with of the contact drying equipment at a temperature above 100° C. whereby the web is at least partly dried forming a film. The invention also relates to a film produced according to the method.
-
公开(公告)号：US20190048527A1
公开(公告)日：2019-02-14
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
CPC classification number: D21H11/18 , B29D7/01 , C08J5/18 , C08J2301/00 , D21C9/007 , D21H11/20 , D21H21/20
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：US20190024318A1
公开(公告)日：2019-01-24
申请号：US16080359
申请日：2017-03-30
Applicant: Stora Enso OYJ
Inventor： Kaj Backfolk , Isto Heiskanen , Esa Saukkonen , Katja Lyytikäinen
Abstract: The present invention relates to a new process for improving dewatering when manufacturing a film comprising high amounts of microfibrillated cellulose (MFC) without negatively impacting the film properties. According to the present invention a high amount of nanoparticles is used as an additive, optionally together with a polymer.
-
公开(公告)号：US20150308017A1
公开(公告)日：2015-10-29
申请号：US14441263
申请日：2013-10-30
Applicant: Stora Enso Oyj
Inventor： Kaj Backfolk , Heidi Saxell , Isto Heiskanen , Lars Axrup , Cecilia Land Hensdal , Veikko Jokela , Esa Saukkonen , Ari Kotilainen , Henri Kastinen , Anna Kauppi
IPC: D01F2/00
CPC classification number: D01F2/00 , C08L1/04 , D21C9/007 , D21C9/06 , D21C9/18 , D21H11/18 , F26B3/36
Abstract: A method for drying nanofibrillated polysaccharide to obtain a substantially dry nanofibrillated polysaccharide product, comprising the following steps: (i) providing an aqueous suspension of nanofibrillated polysaccharide; (ii) increasing the solid content of said suspension, thereby forming a high solid content microfibrillated cellulose suspension; and (iii) drying said high solid content microfibrillated cellulose suspension, through a simultaneous heating and mixing operation.
Abstract translation: 一种干燥纳米纤维化多糖以获得基本干燥的纳米纤维化多糖产物的方法，包括以下步骤：（i）提供纳米纤维化多糖的水性悬浮液; （ii）增加所述悬浮液的固体含量，从而形成高固体含量的微纤化纤维素悬浮液; 和（iii）通过同时加热和混合操作来干燥所述高固含量微纤化纤维素悬浮液。
-
-
-
-
-
-
-
-
Search Results
59
records
(took 0.017 seconds)
