Scientific name: Teak (Tectona.spp), Verbenaceae tectona
Trade name or alias: Teak Teak (Myan, India, Thailand), Jati Jati (Indian), Kuhn Kyun (Myan), Mai-Sak Mai sak (Thai), Ma Li, Fat Tree, Purple Teak (Yunnan afforestation Tree species); also named after the country of origin: Thai teak, African teak, Cambodian teak; gold teak (Gold Teak), heavy teak (Stone Teak).
Trees and distribution: Teak is a deciduous tree, and the size and shape of the trees vary greatly depending on the climate and growth conditions of the producing area. The tree height of the origin can reach 35~45m, the breast diameter can reach 0.9~2.5m, the trunk is straight, the bark is light gray and gray, thin, the skin is shallow and longitudinal, and the material is elongated and grooved.
Teak (Tectona grandis) is native to Southeast Asian countries such as India, Malaysia, Myanmar and Thailand. It is widely used in countries such as Africa and South America because of its high wood use value. In our country, Taiwan, Hainan Island, coastal areas of Guangdong, and western Yunnan and southern Fujian have also introduced and cultivated. In addition to the natural forests from Southeast Asia, some of the wood in the market comes from artificially cultivated forests. The prices of wood from different sources are very different.
Wood characteristics: the growth wheel is obvious; the ring hole material to the semi-ring hole material, the width is slightly uneven, or slightly wavy, 1~4 rounds per cm; the early material tube hole is slightly larger to very large, obvious under the naked eye, usually 1~ 2 rows of tube holes; early material to late material slightly change; common invading body; with white sediment; axial thin-walled tissue is not clear; wood rays are many, very fine to medium; there are ray markings on the diameter surface; There is no intercellular tract.
The sapwood is yellowish brown and reddish, and the heartwood is distinctly different. The heartwood is light brown or brown. It is dark brown in the air, and the regular section is irregularly dark brown strip with golden luster. It is oily and sexy. Odor; no special taste; medium to thick, uneven; texture until slightly staggered;
Physical and mechanical properties: basic density: 0.48g/cm3, air dry density: 0.601g/cm3; among which Thai teak (12% moisture content): 0.672 g/cm3; African teak (12% moisture content): 0.564 g/cm3; Cambodian teak (12% moisture content): 0.573 g/cm3. The shrinkage rate is small, the volume shrinkage coefficient is ≤0.45%, the Chinese Yunnan material is 0.413 g/cm3; the radial shrinkage factor is 0.144; the chordwise dry shrinkage coefficient is 0.263; the compressive compressive strength is 48.4MPa; the bending strength is : 104.3 MPa; flexural modulus of elasticity: 10.2 GPa. Moderate hardness, end face hardness: 41 ~ 65MPa (water content is 12%). If the above data is not specified in China, the water content is 15%.
Processability: Wood has good natural drying performance, but slower, less warpage and cracking; good dimensional stability. The heartwood is strong in corrosion resistance and anti-ant resistance, and can resist the harm of marine drilling wood animals; Poor heart penetration, difficulty in impregnating preservatives, and acid resistance. Good wood processing performance, easy sawing and smooth cutting surface. Due to the large amount of inclusions, it is easy to blunt the cutter when cutting, and there is a pin saw phenomenon. Good paintability; good adhesiveness; good nail holding power.
Uses: Due to the excellent wood properties (good stability, good corrosion resistance, good ant resistance), the strength and processing performance are moderate, the trunk is tall and straight, the wood pattern is beautiful, the color is pleasing to the eye, and the touch is good. Therefore, teak is widely used and is a world-famous excellent hardwood tree. Commonly used in the shipbuilding industry (deck, hull, pulp, concrete, cabins, etc.), house construction (doors, windows, floors, stairs, decoration, pillars, etc.), vehicles, harbor terminals (anti-sea marine drilling), bridges , poles, sleepers, high-grade furniture (especially chemical factories and laboratory furniture), decorative veneers, plywood and veneers; can also be used as models, instrument boxes, woodcarvings and musical instrument shells (piano, organ); military The aspect can be used as a stock and a grenade handle.
Trade name or alias: Teak Teak (Myan, India, Thailand), Jati Jati (Indian), Kuhn Kyun (Myan), Mai-Sak Mai sak (Thai), Ma Li, Fat Tree, Purple Teak (Yunnan afforestation Tree species); also named after the country of origin: Thai teak, African teak, Cambodian teak; gold teak (Gold Teak), heavy teak (Stone Teak).
Trees and distribution: Teak is a deciduous tree, and the size and shape of the trees vary greatly depending on the climate and growth conditions of the producing area. The tree height of the origin can reach 35~45m, the breast diameter can reach 0.9~2.5m, the trunk is straight, the bark is light gray and gray, thin, the skin is shallow and longitudinal, and the material is elongated and grooved.
Teak (Tectona grandis) is native to Southeast Asian countries such as India, Malaysia, Myanmar and Thailand. It is widely used in countries such as Africa and South America because of its high wood use value. In our country, Taiwan, Hainan Island, coastal areas of Guangdong, and western Yunnan and southern Fujian have also introduced and cultivated. In addition to the natural forests from Southeast Asia, some of the wood in the market comes from artificially cultivated forests. The prices of wood from different sources are very different.
Wood characteristics: the growth wheel is obvious; the ring hole material to the semi-ring hole material, the width is slightly uneven, or slightly wavy, 1~4 rounds per cm; the early material tube hole is slightly larger to very large, obvious under the naked eye, usually 1~ 2 rows of tube holes; early material to late material slightly change; common invading body; with white sediment; axial thin-walled tissue is not clear; wood rays are many, very fine to medium; there are ray markings on the diameter surface; There is no intercellular tract.
The sapwood is yellowish brown and reddish, and the heartwood is distinctly different. The heartwood is light brown or brown. It is dark brown in the air, and the regular section is irregularly dark brown strip with golden luster. It is oily and sexy. Odor; no special taste; medium to thick, uneven; texture until slightly staggered;
Physical and mechanical properties: basic density: 0.48g/cm3, air dry density: 0.601g/cm3; among which Thai teak (12% moisture content): 0.672 g/cm3; African teak (12% moisture content): 0.564 g/cm3; Cambodian teak (12% moisture content): 0.573 g/cm3. The shrinkage rate is small, the volume shrinkage coefficient is ≤0.45%, the Chinese Yunnan material is 0.413 g/cm3; the radial shrinkage factor is 0.144; the chordwise dry shrinkage coefficient is 0.263; the compressive compressive strength is 48.4MPa; the bending strength is : 104.3 MPa; flexural modulus of elasticity: 10.2 GPa. Moderate hardness, end face hardness: 41 ~ 65MPa (water content is 12%). If the above data is not specified in China, the water content is 15%.
Processability: Wood has good natural drying performance, but slower, less warpage and cracking; good dimensional stability. The heartwood is strong in corrosion resistance and anti-ant resistance, and can resist the harm of marine drilling wood animals; Poor heart penetration, difficulty in impregnating preservatives, and acid resistance. Good wood processing performance, easy sawing and smooth cutting surface. Due to the large amount of inclusions, it is easy to blunt the cutter when cutting, and there is a pin saw phenomenon. Good paintability; good adhesiveness; good nail holding power.
Uses: Due to the excellent wood properties (good stability, good corrosion resistance, good ant resistance), the strength and processing performance are moderate, the trunk is tall and straight, the wood pattern is beautiful, the color is pleasing to the eye, and the touch is good. Therefore, teak is widely used and is a world-famous excellent hardwood tree. Commonly used in the shipbuilding industry (deck, hull, pulp, concrete, cabins, etc.), house construction (doors, windows, floors, stairs, decoration, pillars, etc.), vehicles, harbor terminals (anti-sea marine drilling), bridges , poles, sleepers, high-grade furniture (especially chemical factories and laboratory furniture), decorative veneers, plywood and veneers; can also be used as models, instrument boxes, woodcarvings and musical instrument shells (piano, organ); military The aspect can be used as a stock and a grenade handle.
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