irradiation of dissolving pulp by electron beams - Lenzing

1
-
&Q
75
E 70
lQ5
-E
60
55
50
45
aged standard irradiated aged 22% CS2; AR irradiated 22%
Standarcl 0.5 (32; AR 0.5
Figve 8. Brightness of unbleached fibers at standard spinning conditions (pilot plant hi&).
Conclusion References
Electron beam treatment of pulp slightly
improves viscose filterability at a very low level
of CS2 charge (lab plant).
However, this improvement is not liirge enough
to justify the additional costs of electron beam
treatment. The higher hemicellulose conteat in
the steeping lye and the enhanced yellowing of
the fibers are further arguments against electron
beam treatment of dissolving pulp.
The often published results of drastically better
viscose quality by using irradiated pulp could not
be confirmed in our study of Solucell450.
[ 11 Fisher, K.; Goldberg, W.; Wilke, M. Lanz.
BeE 1985,59,32.
[Z] Rajagopal, S. et al. "Enhancement of
Cellulose Reactivity in Viscose Production
Using Electron F'rocessing Technology"'
Viscose Chemistry Seminat, Stockholm,
1994.
[3] Rajagopal, S. PETAS Seminar, Hamburg,
1995.
[4] Rajagopal, S. Cellulosic Man-Made Fibre
Summit, Singapore, 1997.
[5] Stavtsov, A.; Cassel, A. Cellulosic Man-
Made Fibre Sumit, Singapore, 1997.
[6]
Schleicher, H.; Bomneister, B.; Voges, M.
Cellulosic -Made Fibre Summit,
Singapore, 1997.