PHYSICAL, CHEMICAL AND PULPING CHARACTERISTICS OF ONCOCALAMUS WRIGHTIANA IN RELATION TO PAPER-MAKING

Bassey Sam Enoh

Abstract


T

he preliminary physical, chemical and pulping characteristics of Oncocalamus wrightiana- a non-woody plant was investigated for its potential as a source of paper-making raw material using standard methods. The result shows that the stem has an average fibre length of 3.45±0.07 mm. This clearly shows that the plant belongs to the long fibre group. The ash content was 1.14 % and acid insoluble lignin was 30.11 % which is typical of non-woody plants. In the kraft pulping process the maximum tensile strength of 78.45 Nm/g was attained at 180 oC using chemical concentration of 40 g/dm3; the highest tear index of 12.55 mNm2/g was attained at a chemical concentration of 60 g/dm3, while the highest burst strength of 6.06 kg/cm2 was attained at a chemical concentration of 40 g/dm3. In the soda process, the grammage, tear, burst and tensile strength properties decreased with increase in temperature and concentration of chemical. The highest tensile strength of 62.22 Nm/g was attained at a temperature of 160 oC, and a chemical concentration of 40 g/dm3, while the highest tear strength of 9.22 mNm2/g was attained at a chemical concentration of 50 g/dm3. These values were less than the corresponding values in kraft process.  The results have demonstrated the potential of Oncocalamus wrightiana as a source of long fibre for the pulp and paper industry as compared to its current usage in cane chair production.

Key Words:  Kraft, Soda, Pulping, Oncocalamus wrightiana plant, Paper properties


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