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

IPC: C08L1/02 ,  D21H11/18 ,  C08J5/18 ,  C08K5/00

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

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

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

IPC: D21H11/18 ,  D21H17/68 ,  D21H17/28 ,  D21H17/37 ,  D21H17/55 ,  D21H21/50

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：US09926668B2

公开(公告)日：2018-03-27

申请号：US15389482

申请日：2016-12-23

Applicant: Stora Enso Oyj

Inventor： Lars Axrup ,  Heidi Saxell ,  Veikko Jokela ,  Henri Kastinen ,  Anna Kauppi ,  Kaj Backfolk ,  Nina Ruohoniemi ,  Risto Laitinen ,  Isto Heiskanen ,  Teija Laukala

IPC: D21H11/18 ,  D21H17/67 ,  C08B15/02 ,  D21H17/64 ,  C08K3/26 ,  D21H17/24

CPC classification number: D21H17/675 ,  C08B15/02 ,  C08K3/26 ,  C08K2003/265 ,  C08L2205/16 ,  D21H11/18 ,  D21H17/24 ,  D21H17/64 ,  D21H17/67 ,  C08L1/04

Abstract: A substantially dry composite material comprising a nanofibrillated polysaccharide and two or more additives, wherein the composite nanofibrillated polysaccharide is a microfibrillated cellulose and wherein the additives are lime milk and carbon dioxide, wherein the additives are allowed to react with each other and forming a precipitated calcium carbonate on the nanofibrillated polysaccharide, thereby forming a composite product comprising precipitated calcium carbonate and nanofibrillated polysaccharide.

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。