Effects of Refiner Plates with Different Fillings on TMP Properties

Summary: A new lightweight vertical bar plate was developed by inserting individual bars into the plate base rather than using the traditional sand casting method. Compared to the typical trapezoidal bars, this lightweight vertical bar plate has a very sharp bar edge. Two types of lightweight vertical bar plates with different cutting edge lengths (55 km/s and 97 km/s) were tested in a mixed stock of softwood bleached kraft pulp and hardwood bleached kraft pulp. The results showed that the plate with a larger cutting edge length was more efficient in reducing refining energy and improving paper strength.