Methode zur Erfassung der Benetzung von Holzfasern
Method to determine the wettability of wood fibers
The paper describes a method to measure the wettability of thermomechanical pulps (TMP) from wood. Handsheets were made from pine TMP produced at different pulping temperatures (140 °C, 160 °C and 175 °C). A coloured waterdrop (0.1% aniline-blue solution) is added on the surface of a handsheet. The wettability is defined by the time elapsed from applying the waterdrop on the handsheet until its total penetration. The results reveal that pulping temperature influences the wettability of the TMP. The wettability of the TMP decreases with increasing pulping temperatures during the refining process.