Wood is the main fiber material of paper and pulp industries, 94% materials of the world’s papermaking are wood fiber. In 1997, the total output of paper and paperboard in the world was 299 million tons and pulp output was 178 million tons, of which wood pulp output was 155 million tons, accounting for 87% of the total pulp output, and non-wood pulp output was 0.23 million tons, accounting for 13% of the total pulp output. China is the largest non-wood pulp producer in the world, and most paper pulp mills take wheat grass and waste paper as the main raw materials. The existing raw material structure with a too low proportion of wood pulp is extremely unreasonable, which directly affects the healthy development of the papermaking industry.
In recent year, bamboo gradually becomes an important material for paper pulp making. Why develop bamboo pulp making? CNBM is leading paper pulper machine manufacturer in China, we can supply pulp digester, blow tank, vacuum drum washer, twin roll press, single screw press, and etc. Today, CNBM will help you find the answer!
Good for sustainable development of society, economy and ecology
The development and utilization of bamboo pulp are beneficial to the sustainable development of society, economy, and ecology.
Bamboo fiber is long and thin. As an excellent raw material for papermaking, the bamboo pulp can be applied to produce a variety of writing paper and offset paper, drawing paper, printing paper, and wrapping paper. Generally speaking, a bamboo forest of 0.33hm3 produces one ton of pulp. Bamboo pulp production cost is low, compared with wood pulp, the bamboo pulp has the price advantage. Bamboo’s growth cycle is short (one year survive, two years into the forest), easy to plant, the purchase price is low, the output of bamboo pulp per ton only 4000 yuan, lower than the current price of wood pulp, the cost advantage is quite obvious.
China’s central and western regions are rich in bamboo resources, and Yunnan, Guizhou, Sichuan, Chongqing, Guangxi, Guangdong, Hunan, and Jiangxi provinces have unique bamboo resources, accounting for about 40% of the country’s bamboo forest area. The establishment of bamboo raw material bases in these areas, relying on the industrial chain, is not only conducive to the implementation of returning farmland to the forest but also can promote the development of the local economy. It is estimated that with an annual output of 1 million tons of bamboo pulp, each production of 1 ton of bamboo pulp needs 5 tons of bamboo, and farmers can directly increase their income by 1.5 billion yuan per year. Selecting bamboo to make paper and changing the structure of bamboo for paper making, bamboo pulp making is rational utilization of resources and maybe the new way to use bamboo resources. Bamboos in forest areas are characterized by wide planting range, easy cultivation, high survival rate, short rotation cutting period and large biomass. Generally, 3 years can be thinning, the annual output of 667m2 bamboo forest reach 1-2 tons, after scientific cultivation, can reach 3-4.4 tons. 4 ton of fresh bamboo is needed for every ton of papermaking. The state stipulates that the reasonable scale of bamboo pulp and the paper factory is more than 50,000 tons per year. According to the study, a paper pulp mill with annual output 50,000 tons of bamboo pulp and every ton of paper profit and tax rate up to 35%, it has a large economic benefit.
Good for construction of paper pulp industry
The development and utilization of bamboo pulp will improve the existing structure of raw materials for the paper industry. As the best raw material for papermaking except for wood, bamboo is very suitable for the manufacture of medium and high-grade paper. The results show that the fiber morphology and content of bamboo is similar to that of softwood, which is most suitable for papermaking. Bamboo has high cellulose content, slender and strong fiber, good plasticity, and the fiber length is between hardwood softwood. The properties of bamboo pulp are between softwood pulp and hardwood pulp, obviously better than straw pulp, and apply for various types of papermaking.
For a long time, China’s pulp industry basically has only two kinds of classification: wood pulp and grass pulp (reed, wheat grass, bagasse, and other non-wood materials), while bamboo has not been well developed and utilized. The developed paper industry in the world is dominated by wood pulp, and bamboo pulp only accounts for 1.6% in China’s paper industry. However, with the development of pulp and paper industry, in recent years, bamboo fiber raw material get more and more attention, it is beneficial to resource conservation, environmental protection, and can replace part of the wood pulp.
Substitutes of wood
Bamboo is the fastest growing plant on earth. It has features of low investment, quick effect and sustainable utilization in primary afforestation. With the deep research of bamboo resources and products, the purpose of protecting forest resources will be achieved by substituting bamboo for wood and other ways. Compare to trees, bamboo grow fast and has a high yield, generally, 3-5 years of bamboo can be harvested and used. Once bamboo is planted, based on reasonable management, it can be sustainably used. The well-managed high-yielding bamboo forest can yield 4.5-7.5kg of bamboo timber per hectare, the growth cycle is one-third of the general fast-growing trees, and the yield per unit area is about twice as high.
There are 21 kinds of fine pulp bamboos: huapi bamboos, shuidan bamboos, daqin silk, liaoci bamboos, jinsici bamboos, shuihuang bamboos, huadiao bamboos, zhuanglv bamboos, guidan bamboos, oil bamboos, maole bamboo, teng bamboos, gualv bamboos, miao bamboos, ci bamboos, green bamboos, yingtouhuang bamboos, qian bamboos.
Better pulp bamboo species: Vietnamese giant bamboo, dwarf pear bamboo, small Buddha’s tummy bamboo, small Thai bamboo, giant dragon bamboo, big green bamboo, li angao bamboo, zhejiang light bamboo, autumn bamboo
Whether bamboo could be used as a “second wood” or not is relative to a large extent influence on the development of papermaking industry, at the same time, the bamboo pulp making save timber resources, conducive to the smooth implementation of the national natural forest protection project, bamboo regional agricultural industrial structure adjustment, increasing farmers’ income. It is also beneficial to the revitalization of the local economy, has an extremely important significance.