| 1. |
- Vesterlind, Eva-Lotta, et al.
(författare)
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High Temperature Birch CTMP
- 2005
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Ingår i: Proceedings. SPCI International Conference 2005, Stockholm, Sweden, June 14-16.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The inherent stiffness of birch wood-fibres makes it an excellent raw material in the manufacture of high bulk pulp. By a combination of chemical impregnation of birch chips and pre-heating of the chips to a high temperature prior to refining, it is possible to manufacture CTMP with very high bulk with a low energy input. The bulky pulp obtained is low in shive content and is a suitable choice for the middle-layer of multi-ply board.
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| 2. |
- Vesterlind, Eva-Lotta, et al.
(författare)
-
Low Energy Birch CTMP in Bulky Paper Products
- 2005
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Ingår i: Proceedings. International Mechanical Pulping Conference 2005, Oslo, Norway..
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Konferensbidrag (refereegranskat)abstract
- The effects of high pre-heating temperature (³ 140°C) of birch chips to produce high freeness CTMP have been investigated. The trials revealed that high pre-heating temperature lowers the energy consumption e.g. at 500 ml CSF an increase in temperature from 110°C to 160°C reduced the energy consumption by more than 40 %. Despite the lower energy input, shive content remained low or was even reduced and the internal bond strength, in terms of Scott-Bond, was well in comparison with Spruce CTMP. In summary, high pre-heating temperature can be used to manufacture low energy pulps with very high bulk.
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