Blending impact of softwood pulp with hardwood pulp on different paper properties

摘要

This paper discusses the physical and mechanical strength properties ofpulp stockpaper (°SR, tensile, tear, and burst) obtained by blending different proportions of hard wood and softwood fibre pulps. Regression models were developed by the least square technique and various results were tested graphically and by curve fitting. Bleached short fibre mixed hardwood pulp (Eucalyptus and poplar) and long fibre softwood pulp (Pinus roxburghil) was used. The initial °SR of the softwood pulp was 25, while the hardwood pulp was 33 and 46 respectively for two different sample of hardwood. Various hardwood/softwood blends in the proportion of 100:0, 85:15, 70:30, 55:45,40:60,25:75, 10:90, 0:100 were prepared and then various pulp and paper properties of these blends were estimated using TAPPI standard procedure. Results were analysed with the help of the developed linear model and the univariate regression model. This investigation was undertaken to examine the hypothesis whether the pulp blends follow the super position principles of additivity.