Abstract
Kraft long fibres were found to improve tear strength
much more effectively than mechanical long fibres despite
having similar coarseness (roughly the same number of
fibres per gram). Pure primary TMP fines had relatively
high bulk corresponding to newsprint quality TMP. By
freely combining the three furnish fractions from kraft
and mechanical pulps, scattering of LWC base paper was
improved by 27% and tear index by 7-24%. Handsheet bulk
was unchanged but, due to improved smoothness, lighter
calendaring was enabled, thus offering a possibility for
improved paper bulk. Another means identified for
improving bulk at a given tensile level is to mix a high
number of mechanical long fibres with well-bonding
mechanical fines. The produced data offers possibilities
to design paper furnish in several ways depending on the
desired critical properties.
| Original language | English |
|---|---|
| Number of pages | 4 |
| Publication status | Published - 2014 |
| Event | 29th International Mechanical Pulping Conference , IMPC 2014 - Helsinki, Finland Duration: 3 Jun 2014 → 5 Jun 2014 Conference number: 29 |
Conference
| Conference | 29th International Mechanical Pulping Conference , IMPC 2014 |
|---|---|
| Abbreviated title | IMPC 2014 |
| Country/Territory | Finland |
| City | Helsinki |
| Period | 3/06/14 → 5/06/14 |
Keywords
- mechanical pulp
- fibre
- fraction
- fines
- paper
- bulk
- tensile index
- tear index
- light scattering
- roughness