2012年5月16日星期三

R & D came into being of the wood plate


Wood materials and steel, cement, plastics, known as the four basic raw materials, wood materials, is the only renewable. The main products of wood materials in the past 50 years has gone through two generations, the first generation of logs sawn timber, the second generation of wood-based panels. The main component of wood is lignin, hemicellulose, cellulose, it has been the main raw material for pulp. Of timber is quite part of  wpc Decking floor, pulp industry spent, resulting in deforestation, damage to the Earth's environment, to stop and reduce the amount of deforestation, the voice of a wave after wave. Paper-for example, now made one ton of pulp takes five tons of logs, which is equal to four tons of them as waste water, waste emissions out. Produce one ton of wood-based panels consumption of 1.7 tons of logs, there will be 0.7 tons of wood as the "three wastes" discharge.
In order to solve this crisis, on the one hand advocate replacing wood plastic composite news with steel, plastic and wood, but at the same time, consume a lot of non-renewable oil and iron ore resources. Have been or will inevitably lead to the occurrence of a material crisis. Also exacerbate the Earth to increasing atmospheric CO2 and global warming. On the other hand, the tree is running out, people will use a composite of small timber materials glued together using. To do this you must use large quantities of plastic material. China's annual production of 40 million tons of wood-based panels, use 400 tons of rubber a year, of which more than 90% of urea-formaldehyde glue, which is the main source of formaldehyde in air pollution. Urban people are caught in the pollution of indoor air pollution "as a symbol, but the decoration of the more high-grade indoor pollution is more serious. Corporate compliance materials also release formaldehyde, add up the sum of the more excessive.
Although people try to reduce the formaldehyde content, but excessive reduction is bound to affect the quality of the wood-based panels.Seen the second generation of wood materials is not technically upgrading to give up any formaldehyde-containing materials, indoor air pollution problems to be solved. Now the world's annual wood plastic flooring suppliers
production 1.3 million tons, more than 30,000 plastics manufacturers in China, the annual output of more than 20 million tons, ranking second in the world. Waste plastics in China's annual production of 2.4 million tons -480 tons of plastic waste accounted for 1/4-1/3 of the garbage. Due to the lack of mature and reliable technology, resulting in "white pollution" has become a thorny issue of China's environmental protection cause.
China each year, several million tons of plant photosynthesis, the production of fiber materials are renewable, and can not find the approach to the use, year after year, burning, abandoned, not people will be unable to utilize the production of a new material, instead of oil and timber use? It is in this context that the wood plate came into being.

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