Method to produce fibrous product comprising microfibrillated cellulose

A technology of microfibrillation and cellulose, applied in the direction of chemical instruments and methods, post-treatment modification of cellulose pulp, layered products, etc., to achieve the effect of promoting manufacturing and reducing the amount of agglomeration

Active Publication Date: 2020-07-31
STORA ENSO OYJ
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Use of high-shear mechanical disintegration, which destroys flocs and strands forme

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method to produce fibrous product comprising microfibrillated cellulose
  • Method to produce fibrous product comprising microfibrillated cellulose

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0083] Example

[0084] In the presence of various additives, the effect of mixing the fiber suspension in the Diaf mixer on the aggregation of fibrils was studied. Before mixing, the suspension was diluted to 1.5% by weight consistency using RO (Reverse Osmosis) water. The initial dispersion (=standard addition mode) is typically achieved by dispersing a set amount of fiber suspension in a dilute solution of chemical additives for 30 seconds using a rod mixer. In the reverse addition mode, a dilute solution of chemical additives is applied to the fibril suspension. In a standard dual-additive system, the first chemical is applied using the standard addition mode, ie the fibrils are introduced into the additive solution and the second additive is dosed into the resulting mixture. In the reverse dual mode, two chemical solutions are introduced into the fibril suspension. In the pre-mix mode, the chemical additives are mixed together before the fibrils are introduced into the fo...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A method for the production of a fibrous product from a fibrous web, wherein the method comprises the steps of: providing a fibrous suspension comprising a microfibrillated cellulose, wherein the content of the microfibrillated cellulose of the suspension is in the range of 60 to 99.9 weight-% based on total dry solid content, adding an uncharged, amphoteric or weakly cationic polymer having a molecular weight of at least 50000 g/mol to the suspension, adding an anionic polymer having a molecular weight of at least 00000 g/mol to the suspension to provide a mixture of the microfibrillated cellulose, the uncharged, amphoteric or weakly cationic polymer and the anionic polymer, 1 providing the mixture to a substrate to form a fibrous web,wherein the amount of uncharged, amphoteric or weaklycationic polymer in the mixture is in the range of 0.1 to 20 kg/metric ton based on total dry solid content and wherein the amount of anionic polymer in the mixture is in the range of 0.01 to 10 kg/metric ton based on total dry 20 solid content; and dewatering the fibrous web to form a fibrous product.

Description

technical field [0001] The present invention relates to an improved method of preventing the formation of fiber agglomerates in a suspension comprising microfibrillated cellulose (MFC) and to an improved method of producing a fiber product from a fiber web. Background technique [0002] Manufacturing fibrous products or films from suspensions comprising microfibrillated cellulose (MFC) on a paper machine is very demanding. Problems arise when releasing material from the wire of a paper machine due to low dewatering speeds and the formation of dense fibrous products. There is also the risk that too strong a dewatering can lead to pin-holes in the web, which deteriorate the quality of the product. Another key variable is the formation of the web, which in turn affects the properties of the web. [0003] Various fabrication methods have been proposed to produce MFC or NFC (nanofibrillated cellulose) membranes such as free standing membranes by coating NFC on a plastic carrier...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L1/02C08J5/18D21H11/18D21H17/28D21H17/32
CPCC08L1/02D21H11/18D21H27/10D21H19/02D21H19/82D21H19/52D21H19/34D21H19/20D21H19/22C08L1/286C08L5/00C08L33/26C08J5/18D21H17/28D21H17/32B32B27/10B32B27/32B32B2307/72D21F1/0027D21H17/42D21H17/45D21H21/08D21H23/04
Inventor K.巴克福克I.海斯卡宁E.绍科宁K.利蒂凯因宁
Owner STORA ENSO OYJ
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap