Document Type : Research Paper

Authors

• Saeid Kamrani ¹
• Ahmad reza Saraeyan ²
• Eyman Akbarpoor ¹

¹ M.Sc , Wood and Paper Science Gorgan University of Agricultural Sciences and Natural Resources,

² Assistant prof., Faculty members Gorgan University of Agricultural Sciences and Natural Resources

Abstract

In this study, mechanical and optical properties of CMP, one stage APMP and two stage APMP pulps ( from Tajan wheat straw Golestan province ) were investigated. wheat straw collected at research center of Agriculture and Natural resources of Golestan province. Fiber dimensions such as average fiber length , diameter cell , lumen and  fiber wall thickness were assessed at 1.18mm, 18.156, 11.461 and 3.396 microns, respectively. chemical  components such as cellulose , lignin , ash and extractives were assessed at 53.7, 21.1, 5.1 and 8.5 percent, respectively. Based on the preliminary experiment results, impregnation temperature was 95⁰C, impregnation times of 10, 20, 30, 40 minutes, caustic charge 10% and peroxide charge was 3% in CMP ,one stage APMP  and two stages APMP pulps. Considering pulp properties and treatment conditions, many treatments including 20 and 40 minutes treatments were selected for making of handsheet. The selected pulps were refined up to 350 ml (CSF) freeness prior to making of hasndsheet. Final results indicated that two stages APMP pulp (impregnation in time 40 minutes) had  the highest burst strength, breaking length and brightness. Also, the results of yield and tear strength showed that, there was no meaningful difference at the 5% level between three methods CMP, one and two stages of APMP pulps.

Keywords

• Tajan wheat straw
• Chemi-mechanical Pulping
• Alkaline Peroxide Mechanical Pulping
• MECHANICAL PROPERTIES
• Optical properties
• yield

Main Subjects

• Pulp and paper