The lightest wood in the world is "balsa"

After each big tree is cut down, it will become processed wood, and different kinds of wood also have their own uses in the production process. Do you know the name of the lightest wood in the world? How much does this wood weigh? What is the value of the lightest wood in the world? Let's have a look!

The lightest wood in the world is "balsa"

Lightweight wood (only115kg per cubic meter)

Trees and balms originated from the University of Kapok in the United States weigh only 1 15 kg per cubic meter. A normal adult can lift eight times his own volume of balsa wood. Basha wood grows in the tropical forests of the United States, which is one of the fastest growing trees in the world and the lightest wood. This kind of tree is evergreen all year round and has a tall trunk. Leaves are like phoenix trees, five yellow and white petals are like hibiscus flowers, and the fruit splits like cotton. The southern part of Taiwan Province Province has been introduced for a long time. Since 1960, it has also been planted in a large area in Guangdong and Fujian, and it is growing well.

The weight of balsa wood is only 0. 1 g per cubic centimeter, which is one tenth of the weight of the same volume of water. The poplar we used to make matchsticks is three and a half times heavier than it. Although its wood texture is light, but its structure is firm, it is a valuable material for special crafts such as aviation and navigation. Local residents have long used it as a raft to travel between islands. China uses it as a cork for thermos bottles.

The value of balsa wood

Lightweight wood is the lightest commodity material in the world. Because of its minimum dissolved weight, uniform material and easy processing, it can be used as an important material for many lightweight structures. For example, the aviation industry family makes sandwich board materials; Because of its small structural variation, small shrinkage and expansion and good volume stability, balsa wood can be used as a model for various exhibitions and also as a plastic veneer. Light wood is a good thermal insulation material because of its low thermal conductivity. In addition, it can also be used as sound insulation equipment, life-saving chest strap, water buoy and so on. It is reported that balsa wood can also make some special structures that need high temperature resistant materials.

Dry balsa weighs only 6-8 pounds (2.7-3.6 kilograms) per cubic foot. The buoyancy is about twice that of cork, which is suitable for making lifebuoys and life jackets. Because of its good elasticity, it is also an excellent shock-proof material for packaging furniture and making machine cushions.

The specific gravity of dry balsa is only 0. 1-0.25. It can insulate heat and sound, and is a good material for insulating materials, sound insulation equipment, life-saving articles and aircraft manufacturing.

Widely used in aviation, navigation, sound insulation, heat insulation, interior decoration and other aspects, the effect is particularly good.

Bashamu is not only extremely light, with white wood, which is not eaten by insects or eaten by ants, but also grows rapidly, with tall and straight trunk, few branches and large and round leaves. In the tropical rain forest, it is like a A Dai girl in a tight skirt, a silver belt and a green paper umbrella. It is elegant.

Morphological characteristics of balsa wood

Medium-sized evergreen tree, 10- 12-year-old, with a height of 16- 18m, a bust of 1.53- 1.83m and a gray and smooth bark. Leaf blade is heart-shaped, ovate, palmately lobed or not, slightly stellate pilose on the back, long 15.24-30.5cm, wide 12.7-20-32cm, with 7 palmlike veins at the base, 5-6 pairs of pinnate veins on both sides of midvein, nearly opposite, and most of the other palmlike veins have pinnate veins outside. Petiole is 5-20cm long, 0.64-1.27cm thick, densely brown stellate pilose; Stipules obvious, caducous. Flowers solitary, axillary near the top of branches, erect; Pedicel is 8- 10 cm long and 5 mm thick, and calyx is covered with brown stellate hairs; The calyx tube is thick and leathery, 3.5 cm long, and the upper part is 2 cm thick. The calyx lobes are about 65438 0 cm long, of which 3 are wide oval, near the membrane edge, with woolly hairs, and the other 2 are pointed triangles, thick and hairless; Petals spoon-shaped, white, 8-8.5cm long,1.3-1.8cm wide, glabrous; The stamen tube is 9 cm long, the lower part is thin and cylindrical, smooth, 5 cm long and 2-3 mm thick, and the upper part is twisted and expanded into a funnel with a thickness of 65438 0.8 cm, with filiform filaments. The style is cylindrical, 4.5 cm long and 65438 0.5 mm thick, with longitudinal grooves. The stigma 59 is twisted into a spiral spindle shape, 2.5 cm long and 5 mm thick, protruding above the anther. The capsule is cylindrical, with a length of 12.7- 17-8cm. There are wool-like tufts on the inner surface and five seams on the back of the ventricle. When mature, the pulp falls off, and the clusters are scattered into cat's tail shape, with many seeds, light red or brown, and sparse blue silk hairs. Flowering in March-April. (fortune telling)

In South America, Ecuador is rich in balsa wood, which is a kind of thick and long wood. Two people can lift it as fast as flying. Lightweight wood is half the weight of cork oak and the lightest tree in the world. It only weighs 1 15 kg per cubic meter. A normal adult can lift eight times his own volume of balsa wood or more.

Light wood is the only evergreen medium-sized tree in Kapok family and Light wood genus. A balsa tree 10 years old, with a diameter of 50-60 cm and a height of 16 meters. The leaves are wide and heart-shaped and grow alternately on the branches. The flowers are large, yellow and white, and planted in the upper canopy. It has a rectangular capsule with fluff and consists of five petals. The seeds are obovate, red or brown, with dense fluff outside, like cottonseed.

Light wood is one of the fastest growing tree species in the world, which can grow to five or six meters a year.

Diameter 5- 13cm. Due to the rapid renewal of cell tissue in the body, all parts of the plant are extremely light, soft and elastic. Light wood, also known as Baise wood, belongs to kapok family and light wood genus. This is an evergreen tree. A balsa businessman aged 10- 12 can reach16-18m, and his bust1.5-1.8m. Its trunk is straight and its bark is brown. Its leaves are wide and heart-shaped, with single leaves alternately arranged on the branches, and the edges of the leaves are deeply prismatic. The flowers are big and white, and they are planted in the upper canopy. This kind of fruit, called capsule, is rectangular, fluffy and consists of five petals. The seeds are obovate, red or brown, densely villous, just like cotton seeds.

This tree is twice as light as cork. A 10 meter long balsa wood with thick folded arms can be easily carried by even a woman. The specific gravity of dry balsa is only 0. 1-0.2. Because of its low thermal conductivity and good physical properties, it is not only heat-insulating but also sound-insulating. It is a good material for insulating materials, sound-insulating equipment, life-saving chest straps, water buoys and aircraft manufacturing. Because of its minimum wood capacity, difficult deformation, good volume stability, uniform material and easy processing, it can also make various exhibition models and plastic veneers. In addition, its seed hair can also be used as a filling material for pillows and mattresses.

The basic characteristics of wood are sapwood light yellow and white, heartwood green or light green, which will become shallow after a long time. The end face of the log is covered with green spots. The radial section shows different shades of green with slender dark green or dark brown stripes; If it is a tangential section, the outline texture composed of annual rings is very obvious. Green sediments are distributed in the pores and parenchyma of heartwood. The newly cut wood is fragrant, it is fragrant when sawed, the sawdust is green and sticky, and the water color is light green or dark green. When the water content is 16%, the air dry density is 1.30g/cm3. Drying is very difficult, usually in the shade. The surface of the processed wood is bright and shiny.