| Author | Warinda Karnchanapoo |
| Call Number | AIT Thesis no. PP-99-10 |
| Subject(s) | Paper--Optical properties
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The effect of formation on physical and opacity properties, in particular tensile strength, tear
resistance, opacity and light scattering coefficient was studied based on fiber fractionation.
Non-refined eucalyptus bleached kraft pulp was fractionated by using Bauer McNett fiber
fractionation into four fiber length fractions. The fines fraction which goes through 200 mesh
screen was not collected. Pulp was not refined in order to investigate the effect of natural fiber
length and coarseness on paper formation. The effect of forming consolidation was also
investigated separately by comparing pulp formation potential of a single fiber fraction with
the mixture of two different fiber components at the same fiber length. Standard laboratory
and headbox consistency handsheets were made of each fiber fraction. Effect of formation on
physical and optical properties was presented and analyzed.
Paper with better formation was stronger and more opaque. A further consequence was that
the calculated scattering coefficient of a sheet depended on formation. Increasing pulp
consistency, sheet formation as well as the in-plane strength and optical properties were
suffered except light scattering coefficient. Opacity and light scattering had then reverse
relationship when sheet density is not constant. As a consequence of forming consolidation,
better formation does not necessary predict the strong paper. In addition, average fiber length
does not imply better formation. |
| 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) | Antti Palokangas; |
| Examination Committee(s) | Malinen, Raimo 0. ;Nazhad, MousaM. ; |
| Scholarship Donor(s) | Ahlstrom Machinery Corporation; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1999 |