Pulp Quality Improvement for Ceiling Board Manufacturing by Taguchi Method

Abstract

Paper pulp is the main mixture in the ceiling board production. Since at present the paper pulp has higher price, this thesis had the objectives to find the factors affecting the paper pulp and to reduce the capital cost of the ceiling board production. From the study of the paper pulp preparation process, the researchers emphasized on 3 quality-determining machines, since they did it to get the quality as suitable. There were 6 main control factors - electrical power value of the first quality-determining machine, of the second machine and of the third machine; pulp flowing rate value of the first, of the second and of the third quality­ determining machine. Each factor had 3 levels. The researchers used the design of the experiments with Taguci method, Orthogonal Array L18, to reduce the number of the experiments and the analysis of the paper pulp quality from the response results - strength, length and the tearing value of the paper pulp. From the experiments, it was found that every factor had the influence to the response result. When the experiment was made for adjusting each variable value according the analysis result, the qualitative response result was obtained and it could reduce time and energy in the paper pulp preparation process.