| Author | Ky Thi Hai Yen |
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering in
Pulp and Paper Technology, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The aim of this study was to increase the understanding of the effect of fractionation and
refining at low and medium consistency on Sugarcane Bagasse (Saccharum officinarum
L) pulp taken from the Environment Pulp and Paper Company Limited (EPPCO).
In pressure screen fractionation, longer and coarser fibers go to the reject fraction, while
shorter fibers and fines go directly to the accept fraction. At the reject ratio of 50R/50A,
not only the longest bagasse fibers in the reject fraction were attained, but also the
shortest fibers and fines were achieved in the accept fraction.
Both unfractionated and fractionated bagasse pulps were refined at PFI mill and Valley
beater. The Valley beater refining produces more shortening of fiber length and higher
fines content while the PFI refining improves the tensile strength and slightly increases
the tear strength. Comparing to unfractionated bagasse, sheet made from the reject
fraction are not improved the tensile strength and it has a lower light scattering potential.
However, tear strength were achieved.
A mixture added with a small amount of accept bagasse fraction improved the tensile
strength marginally and light scattering potential considerably while the tear strength was
decreased.
In comparison to eucalyptus, bagasse had a higher average fiber length and thus mixture
of bagasse with softwood developed the tensile strength. However, sheet made from
mixture of bagasse and softwood has lower tear strength and light scattering coefficient. |
| Year | 2008 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Lehtinen, Esa ; |
| Examination Committee(s) | Nazhad, Mousa M. ;Viljakainen, Esa ; |
| Scholarship Donor(s) | Government of Finland ;AIT Fellowship; |