Abstract:

The tests of wood properties and pulping experiment were carries out with the 5-year-old Eucalyptus ABL No.12 grown in Guangdong province. With the weighted mean of the BH disc as the unit, the average values of the following properties were: 90μm of tangential diameter of vessels, 16N/mm² of pores number, 15N/mm of rays number, 0.868mm of fibre length, 2.9 μm of fibre wall thickness, 14.0 of vessels percentage, 29.8 of parenchyma percentage, 56.2 of fibre percentage, and 0.577 of basic specific gravity. The radial variation of these properties was investigated. The wood belonged to a medium class of strength, and contained 77.62% of holocellulose and 25.09% of lignin. A pulping experiment of alkali-AQ process showed that it was easy to pulp, with 46.92% of yield of coarse pulp and 73.8% of bleaching degree, and the sheet formation was good, with 4.58kPa. m²/g of burst index and 7.53mN. m²/g of tear index.

Key words: Eucalyptus ABL No.12, Wood property, Pulping experiment