بررسي خميرسازي كاه گندم به روش سودا آنتراكينون به منظور توليد كاغذ كنگره اي

Investigation on soda - AQ pulping of wheat straw for making fluting paper

This study was performed with the aim of investigation on soda - AQ pulping of wheat straw for making fluting paper. Chemical composition of wheat straw involving of cellulose, lignin, exteractives and ash were assessed as 49.67,21.24, 5.41 and 76.9 %. Wheat straw was delignified by soda - AQ pulping under varying conditions of alkali and cooking time. In addition, Treatment temperature, AQ charge and liquor to feedstocks ratio were kept constant. The effects of cooking parameters (alkali and cooking time) on pulp properties (screened yield, total yield and kappa number) were investigated. The results indicated that alkali and cooking time no significant effect on screened yield and total yield but the significant effect had on kappa number. Optimum pulp was selected and because of the itʹs freeness had in the acceptable level for making of 120 gr/m2 handsheet papers, wasnʹt refined. The resistances of handsheet papers were measured according to TAPPI standards and compared with papers made from occ pulp. The results indicated that fluting papers of wheat straw pulp had superior strength properties as compared with fluting papers of OCC pulp.