Pre-treatment of cellulosic fibres with some
chemicals for effective sizing

Authors*: Arif Karademir1,
Hulya Varlıbas1
Selim Karahan1
Cem Aydemir2

ABSTRACT
There are a number of problems experienced during internal sizing
of papers. Poor size retention and back water contamination
are just two of them. The method which supports the maximum attachment
of sizing agents specifically to cellulose fibres is needed
to solve some problems encountered with sizing operations. In this
work, handsheets were produced from bleached long fibres with the
blend of pretreated fibres with various sizing chemicals. The fibre
pretreatments were achieved by mixing unbeaten fibres with rosin,
paraffin and alkyl ketene dimer (AKD) emulsions at quite higher proportions,
followed by filtration and drying. Strongly sized fibres then
were beaten and mixed with untreated fibres in making a number
of handsheets. Pre-treatments were discussed in respect to paper
sizing, recycling and some suggestions were made.

Authors’ references:
1. Kahramanmaras Sutcuimam University, Faculty of Forestry, Department of Forest Product Engineering, Bahcelievler Campus, 46100 Kahramanmaras, Turkey, phone:+
90-3442237666/451, Fax:+90-3442217244, E-mail: arifkarademir@yahoo.com
2. Marmara University Faculty of Technical Education, Department of Printing, Goztepe Campus, 34722 Goztepe, Istanbul, Turkey. E-mail: cemaydemir@marmara.edu.tr
Corresponding author: Arif Karademir. E-mail: arifkarademir@yahoo.com
Keywords: Acid-alkali paper, fibre modification, paper sizing, reactive
sizing, recycling

 O PAPEL vol. 72, num. 8, pp. 63 - 65 AUG 2011