Study on Surface Densification of Japanese fir and China fir Lumber Grown in Taiwan

• Main Authors: Tzeng-Shiang Huang, 黃曾祥
• Other Authors: Ching-Mu Tasi
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/05030708917191352391

碩士 === 國立臺灣大學 === 森林學系 === 81 === The purposes of this study were to improve specific gravity and machine strengths of wood by decreasing void volume. The method of surface densification was to impregnate with phenol formalde- hyde adhesives and compress only the surface layers of lumber from japanese fir (Cryptomeria japonica) and china fir (Cunninghamia lanceolata ) grown in Taiwan. It's result indicates the surface hardness of lumber which surface densification of japanese fir and china fir increase 2.6 times. And its bending strength increase 1 times with untreated wood. It was to say, surface densification be able to improve effectively surface properties of coniferous softwoods. on the base,Broad-leaf wood replace by conifer- ous softwood to supply furniture produce and room decorate was not dream. It was effective way.