The relationship between grammage and dry strength agent addition of test liner handsheets

In this study, test liner papers in seven different grammage (85 g/m2 , 90 g/m2 , 95 g/m2 , 100 g/m2 , 105 g/m2 , 110 g/m2 , and 115 g/m2 ) were made, and effects of grammage on strength properties of handsheets were investigated. Also, cationic starch (CS) and carboxymethyl cellulose (CMC) (0.75% and 1.5%) added test liner papers in seven different grammage were made. The effects of dry strength agent addition on strength properties of handsheets in the different grammage. The stretch and TEA values of handsheets were increased with increasing grammage. The tensile and tear indices of handsheets were changed irregularly with increasing grammage. On the other hand, burst index of handsheets was not affected with grammage increases. In the all handsheet grammages, the strength properties of handsheets were increased with addition of CS and CMC. The highest strength increases were determined in 1.5% CS added handsheets. On the other hand, effect of dry strength agents on strength properties of test liner in the lower grammage (85 and 90 g/m2 ) was prominent than that of test liner in the higher grammage (110 and 115 g/m2 ). viii Key Words Cationic starch; carboxymethyl cellulose; test liner; grammage; strength properties.