JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 1980, Vol. 4 ›› Issue (03): 57-67.doi: 10.3969/j.jssn.1000-2006.1980.03.007
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Liao Pinyu, Hong Qiqing and Zhang Datong
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Abstract: Bleaching experiments on soda-anthraquinone (AP + AQ) and kraft pulps (KP) of E. citriodora have been carried out in the H, H-H, C-E-H, and C-E-H-D sequences. Bleaching properties of kraft pulps of E. Leizhou No.l, E. tsaaulyuh No.2. and E. exserta in the H process have also been tested. Results indicated E. citriodora (AP + AQ) and E. citriodora (KP) both reached a brightness of over 70% (G. E.) , when an active chlorine of 7% and a pulp consistency of 6% were employed under a temperature of 40℃ for three hours in the H sequence. The brightness of E. citriodora (AP +AQ) reached over 80% (G. E.) and D. P. above 800 when chlorine of 7% was used in the C-E-H-D sequence. Of the four species of eucalyptus, the bleaching property of E.Leizhou No.l was the best, and E. exserta was found most difficult to bleach. The bleaching property of E. tsaaulyuh No.2 was similar to that of E. citrodora. Physical strengths of the bleached pulps of E. citriodora, E. tsaaulyuh No.2 and Leizhou No.l turned up to be quite good, with a breaking length of 6060-8050M, and a folding strength of 59-413. All these pulps can be used to produce paper for printing purposes or even some finer paper.
Liao Pinyu, Hong Qiqing and Zhang Datong. STUDIES ON PULPING AND PAPERMAKING PROPERTIES OF EUCALYPTUS WOODSII. Bleaching Experiments on Four Species of Eucalyptus in Leizhou Peninsula[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 1980, 4(03): 57-67.
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URL: http://nldxb.njfu.edu.cn/EN/10.3969/j.jssn.1000-2006.1980.03.007
http://nldxb.njfu.edu.cn/EN/Y1980/V4/I03/57