Separate or mixed refining for Acacia in fine paper | |
| Author | Li, Yan |
| Call Number | AIT Thesis no.PP-05-01 |
| Subject(s) | Acacia Wood-pulp--Refining |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | In this study, acacia (Acacia mangium) from Indonesia and pine from Finland were used. Acacia, which is new species competing for the share in market has not been evaluated systematically for refining. In order to find out the advantages and the disadvantages of different refining method a comprehensive study using PFI mill to refine has been performed so that acacia and pine fibers have been refined separately and in various mixture at three different mixture compositions. All the refining trials were carried out base on four different target mixture freeness values. Fiber characterizations of acacia and pine have been determined. Fiber characterizations of mixture after mixed-refining have been compared to those after separate refining. The handsheets from those mixtures have been made and some handsheets properties have been compared. The results show that the key strength properties of handsheet could be improved in this work, however, separate refining contributed in the better opacity of handsheet. One conclusion might be got that short, low coarseness acacia fibers are well protected by longer and coarser pine fibers when mixture contains more than 20% pine fibers. This fiber mixture makes strong floes in the refining and an efficient fiber to fiber refining happens so all fibers are nicely development in refining. It seems .mixed-refining is better than separate refining for producing stronger pulp mixture. |
| Year | 2005 |
| 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) | Lehtinen, Esa ;Malinen, Raimo O. |
| Scholarship Donor(s) | Government of Finland ;AIT Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |