Poplar, eucalyptus, fir and pine all belong to quick growth, with fast growth rate, high yield and short cutting cycle. But they each have their own characteristics.
It has the characteristics of fast growth rate, high yield, short cutting cycle, low core content, low volume shrinkage rate, the density, strength and hardness of wood is obviously low. It is a typical soft material tree species, and poplar will have porous white fungi, so that the trees from the inside and outside corrosion. At the same time, because the proportion of young materials in the wood is quite high, resulting in poor material, density and low surface hardness, wood density of poplar wood density per cubic centimeter 0.352 grams, single plate cutting surface hair, these limit its application range, so poplar wood is very cheap and easy to get.
The density of eucalyptus varied greatly, ranging from 0.145 to 1.0 g / cm³. The same tree species grows in different areas with different densities, and many eucalyptus species grow fast and have high wood density. However, there are four major problems in the processing process of eucalyptus trees: first, the growth of eucalyptus stress, often contains brittle heart materials, logs are easy to burst, and material production is difficult. Two is dry deformation, surface crack, wrinkle shrinkage. Third, some eucalyptus trees in the process of use with the environmental climate change size stability is poor. Fourth, the tree diameter is small, the young material is relatively large, the side wood is not resistant to rot. At the same time, the large area planting of eucalyptus has a great impact and harm on the environment.
Pine, masson pine is the most widely distributed in our pine, the largest number of a main timber tree species, masson pine grain straight or oblique uneven, structure to coarse, color and elegant, medium hardness, mechanical strength is larger, wood containing cellulose 62%, air dry density of 0.45-0.65g/cm³, strength and material are superior to the previous two kinds of wood, but masson pine contains pine, need professional drying fat, after processing, masson pine saw timber surface pattern is beautiful, is a good material for furniture and interior decoration materials.
Fir wood is light and delicate, dry and straight, beautiful texture, soft material, easy to dry, small shrinkage, not warped crack, good durability, easy to process, good bonding performance. At the same time, there is a special aroma, with anticorrosion properties. Compared with the three kinds of wood mentioned above, fir wood has the best comprehensive performance and is a high-quality material for making wood-based panels.
