Patent · US Active

Surface sizing of dense films

US10435842B2 · kind B2 · utility

3Cited by

0References

18Claims

0Family size

Assignee

Stora Enso OYJ · FI

Inventors

Isto Heiskanen · Imatra, FI
Kaj Backfolk · Lappeenranta, FI
Esa Saukkonen · Lappeenranta, FI

Key dates

Filing date	Sep 16, 2016
Grant date	Oct 8, 2019
Priority date	—
Expiry date	Sep 20, 2036

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21H19/36
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

A method for manufacturing a film, wherein said film has a basis weight of less than 50 g/m2 and wherein the density of the film is higher than 750 kg/m2 comprising the steps of: providing a suspension comprising microfibrillated cellulose (MFC); forming a web of said suspension on a porous wire, microfibrillated cellulose (MFC); surface sizing said web, wherein the web, at the beginning of the surface sizing step, has a moisture content in the range of from 10 to 50 wt-%; drying said surface sized web to a final moisture content of between 0.1-20 wt-% to form said film.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.