Document Type : Research Paper
Authors
1 Ph.D. Student of pulp and paper Industry, Agricultural Sciences and Natural Resources of Sari University. Iran
2 Department of Wood and cellulose products. Faculty of Natural Resources, Sari university of Agricultural Sciences and Natural resources, Iran
3 Head of zirab campus
4 Faculty of New Technologies and Aerospace Engineering of Shahid Beheshti University, Iran
5 Wood and Paper Science Department, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resource University Sari, Iran
Abstract
Sticky contaminants represent one of the biggest technical challenges in the paper recycling process. These contaminants reduce paper strength, cause plugging of wires and felts, and stick to or deposit on machine parts affecting the runnability of the paper machine In this study, firstly, the sticky deposit of Docter blade dryer blades was subjected to multi-stage extraction with alcohol, aceton, toluene, and tetrahydrofuran solvents respectively. Then the nature of the resulting material and its physicochemical properties was investigated with FTIR analysis, GC-MS, TGA, XRF, SEM.. The results showed that the deposite originates from fiber, polymers such as polyvinyl acetate and styrene butadiene, which are components of hot melt adhesives, and fatty acid/resin esters. Fatty acids and resins are the most common organic compounds in stickies deposite. the possible origin of these compounds are chemical substances (saponified fatty acids), deinking steps and some resins and fatty acids used in the formulation of adhesives or more resistant resins and extractive materials related to Cellulose fibers. The observed minerals are mainly calcium, iron, silica and aluminum, which are present in the formulation of fillers and coating pigments during the papermaking process
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