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임기표,소원택 한국목재공학회 1989 목재공학 Vol.17 No.3
The proportion of imported wood has been naw over 80% of raw materials needed in the wood industry, and therefore, many of studies an the substitution of domestic wood far imparted wood arid on the increasing the utilization rate of domestic species have been attempted and considered as very important projects to solve. But these trials were practically restricted by several disadvantages of domestic species, such as a small diameter, variety of species, and irregularity of wood physical or chemical characteristics, etc. From a this point of view, this study was carried out to investigate solid wood bending properties of sample trees and then to develop their end-uses. The species of sample trees were Pinus densiflora S. et Z., Pinus rigida Mill., and Larix leptolepis Gord., which have large growing stocks but Pinus rigida and Larix leptolepis have not been used well because of their poor qualities. The results obtained were as follows : 1. The optimum conditions for solid wood bending processing of Pinus densiflora, Pinus rigida, and Larix leptolepis are showed in Table 6. 2. The minimum solid-bending radii of Plnus densiflora, Pinus rigida, and Larix leptolepis were 260㎜, 240㎜, and 300㎜, respectively in steaming treatment.
임기표,소원택 한국목재공학회 1990 목재공학 Vol.18 No.2
This study was carried out to investigate the wood qualities for the end-use development of sycamore (Platanus occcidentalis L.) grown in Korea. The results obtained were as follows: 1. The average length of wood fibers was 1.56㎜ and the average width of annual rings was 9.5㎜. It had very fast growth rate. 2. The specific gravity in air-dry was 0.66. The shrinkage and water absorption were relatively large. The shear and impact strengthen were very strong, while the compressive, tensile, and bending strengthen were weak in comparison to it's specific gravity. 3. The contents of ash, holocellulose, lignin were relatively high 0.74, 83.08%, 28.79%, but that of pentosan was low 18.53. 4. The expected uses of sycamore wood are plywood, fancy veneer, small furniture, musical instrument, door and window frame, tool handels, boxes, etc.