REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES
Bleached unrefined and refined sawdust kraft pulps were added to bleached Norway spruce thermomechanical (TMP) and pressurised groundwood (PWG) pulps in different proportions. Handsheets were prepared and tested for physical properties. In addition, economic calculations were done to estimate the pr...
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North Carolina State University
2009-11-01
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Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_04_4_1572_Korpinen_F_Reinforcement_Sawdust_KRaft_Pulp/462 |
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doaj-80c967132d6f46ca9337fe23552a5acb2020-11-24T21:56:49ZengNorth Carolina State UniversityBioResources1930-21262009-11-014415721585REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHESRisto I. KorpinenPedro E. FardimBleached unrefined and refined sawdust kraft pulps were added to bleached Norway spruce thermomechanical (TMP) and pressurised groundwood (PWG) pulps in different proportions. Handsheets were prepared and tested for physical properties. In addition, economic calculations were done to estimate the production costs of different bleached pulps in Finland. It was found that the addition of unrefined and refined sawdust kraft pulp improved drainability of the mechanical pulps. Tear strength of PGW furnishes was increased when either unrefined or refined sawdust pulp was added. Tear strength of TMP furnishes was not influenced when different sawdust kraft pulps were added. Up to 30 % of unrefined sawdust kraft pulp could be added and no significant negative effect was observed in TMP and PGW furnishes. On the other hand, when refined sawdust kraft pulp was added into the mechanical pulp furnishes, a clear improvement in the tensile strength was observed. According to the economic calculation the production cost of bleached sawdust kraft pulp is almost as low as the production cost of bleached mechanical pulp. We suggest that economically viable sawdust kraft pulp can be used as a substituent for expensive long fibre reinforcement kraft pulp in the production of mechanical pulp based papers.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_04_4_1572_Korpinen_F_Reinforcement_Sawdust_KRaft_Pulp/462Bleached sawdust kraft pulpTMPPGWEconomics |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Risto I. Korpinen Pedro E. Fardim |
spellingShingle |
Risto I. Korpinen Pedro E. Fardim REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES BioResources Bleached sawdust kraft pulp TMP PGW Economics |
author_facet |
Risto I. Korpinen Pedro E. Fardim |
author_sort |
Risto I. Korpinen |
title |
REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES |
title_short |
REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES |
title_full |
REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES |
title_fullStr |
REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES |
title_full_unstemmed |
REINFORCEMENT POTENTIAL OF BLEACHED SAWDUST KRAFT PULP IN DIFFERENT MECHANICAL PULP FURNISHES |
title_sort |
reinforcement potential of bleached sawdust kraft pulp in different mechanical pulp furnishes |
publisher |
North Carolina State University |
series |
BioResources |
issn |
1930-2126 |
publishDate |
2009-11-01 |
description |
Bleached unrefined and refined sawdust kraft pulps were added to bleached Norway spruce thermomechanical (TMP) and pressurised groundwood (PWG) pulps in different proportions. Handsheets were prepared and tested for physical properties. In addition, economic calculations were done to estimate the production costs of different bleached pulps in Finland. It was found that the addition of unrefined and refined sawdust kraft pulp improved drainability of the mechanical pulps. Tear strength of PGW furnishes was increased when either unrefined or refined sawdust pulp was added. Tear strength of TMP furnishes was not influenced when different sawdust kraft pulps were added. Up to 30 % of unrefined sawdust kraft pulp could be added and no significant negative effect was observed in TMP and PGW furnishes. On the other hand, when refined sawdust kraft pulp was added into the mechanical pulp furnishes, a clear improvement in the tensile strength was observed. According to the economic calculation the production cost of bleached sawdust kraft pulp is almost as low as the production cost of bleached mechanical pulp. We suggest that economically viable sawdust kraft pulp can be used as a substituent for expensive long fibre reinforcement kraft pulp in the production of mechanical pulp based papers. |
topic |
Bleached sawdust kraft pulp TMP PGW Economics |
url |
http://ojs.cnr.ncsu.edu/index.php/BioRes/article/viewFile/BioRes_04_4_1572_Korpinen_F_Reinforcement_Sawdust_KRaft_Pulp/462 |
work_keys_str_mv |
AT ristoikorpinen reinforcementpotentialofbleachedsawdustkraftpulpindifferentmechanicalpulpfurnishes AT pedroefardim reinforcementpotentialofbleachedsawdustkraftpulpindifferentmechanicalpulpfurnishes |
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