| Author | Quader, M. M. A. |
| Call Number | AIT Thesis no. PP-99-8 |
| Subject(s) | Jute fiber, Paper industry--Bangladesh
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Engineering, School of Environment, Resources and Development
|
| Publisher | Asian Institute of Technology |
| Abstract | The aim of this thesis was to use jute plant as a main raw material for fine paper and board
making. To fulfill the target efficiently two pulping processes, chemical and semichemical
pulping were selected for jute fiber and jute stick respectively. Sun dried jute fiber and jute
sticks were collected from Shibpur area, Narsingdi District, Bangladesh.
Jute bast fiber was cooked by soda process with different H-factor and a wide range of
chemical charge (6-20)%. Bleaching sequence followed was Do-E-D1-D2. Pulp was refined to
different beating degrees. Handsheet properties, both mechanical and optical were measured
and compared among themselves and with those of standard wood and nonwood properties.
Jute sticks were cooked by semichemical pulping process, cooking conditions were followed
as rising time 30 min, cooking time 2 hr and cooking temp 95°C and chemical charge as (6-
18) % EA. Important board properties were measured and compared with those of some
standard boards. A fibre morphology study was also done in this project. The hollocellulose
and lignin were determined both for bast fibre and stick.
The results can be summarized as follows:
I. Jute bast fibres was cooked with a low alkali charge of (I 0 to 12) % to the Kappa
number of about 15, with the yield of 65% and with a high viscosity.
2. Unbleached jute soda AQ pulp in the kappa number range of 13 to 20 was fairly
easy to bleach with the four stages sequence of Do- E- D1- D2 to the brightness of (85
to 89) % ISO, with a high viscosity level (1000 ml/g). The total production yield
would be about 60%, which is exceptionally high.
3. Beatability of unbleached soda pulp was good and strength values achieved
exceptionally high.
4. Jute sticks could be utilised as semichemical pulp in the production of corrugating
medium. This part of the study was rather limited and the optimum conditions of
cooking and the quality to be achieved could not be given because laboratory refining
at PPT was not representative. However, very probably the yield would be (75 to 80)
% with a low chemical charge and the quality (RCT) competitive. |
| Year | 1999 |
| 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) | Nazhad, Mousa M.; |
| Examination Committee(s) | Malinen, Raimo 0. ;Kolehmainen, Heikki ; |
| Scholarship Donor(s) | Government of Finland; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |