Substantially dry composite comprising a nanofibrillated polysaccharide

US9926668B2 · kind B2 · utility

Assignee

• Stora Enso OYJ · FI

Inventors

• Lars Axrup · Fållan, SE
• Heidi Emilia Saxell · Hallenberg, DE
• Veikko Jokela · Imatra, FI
• Henri Kastinen · Helsinki, FI
• Anna Kauppi · Helsinki, FI
• Kaj Backfolk · Lappeenranta, FI
• Nina Ruohoniemi · Imatra, FI
• Risto Laitinen · Imatra, FI
• Isto Heiskanen · Imatra, FI
• Teija Laukala · Lappeenranta, FI

Key dates

• Filing date: Dec 23, 2016
• Grant date: Mar 27, 2018
• Expiry date: Dec 23, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2205/16
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

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.