Effects of chemical treatments on ultra-high-yield pulping 1. Fiber separation |
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| Authors: | Dr Yuan-Zong Lai Dr Tadashi Iwamida |
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| Institution: | (1) State University of New York College of Environmental Science and Forestry Empire State Paper Research Institute, 13210 Syracuse, NY, USA |
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| Abstract: | Summary Specially designed wood blocks from Norway spruce were used to study the nature of the fracture surfaces developed in shear using a tensile tester. In the case of the control (water-soaked blocks), the fracture in the latewood takes place mainly in the S1 layer while in the earlywood the fracture occurs across the double cell wall. After dilute alkali treatment, some earlywood cells also fracture in the S1 layer. For sulfite-treated samples, on the other hand, both earlywood and latewood fracture in the middle lamella.Financial support from the Empire State Paper Research Associates (ESPRA) is greatly appreciated |
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