Release Paper and Method of Manufacture

摘要

Release base papers with improved surface properties and more efficient manufacturing potential are made using cellulose nanofibrils (CNF) along with high freeness, less refined pulp. Release papers serve as the backing for common adhesive labels, for industrial film coatings, and also for certain food processing uses. The CNF may be added to the furnish and processed to paper, or the CNF may be added as a coating onto a partially dried web of paper. The CNF may optionally be combined with a starch and a starch crosslinker.

主权项

1. A method for producing a release base paper, the method comprising
a. manufacturing a release base paper with a paper-making furnish having a fiber freeness (CSF) of 180 ml or higher; b. pressing the furnish into a web of paper; c. drying the pressed web; and d. calendering the web to form a release base paper e. wherein the release base paper is manufactured with nano-fibrillated cellulose added to the release base paper by means of at least one of: (i) incorporation into the furnish at a loading concentration of from about 10 to about 400 lbs/ton; and (ii) coating on the web of paper at a coating rate of about 0.2 to about 12 g/m2.