Paper Chemicals Status And Development - Paper, Chemicals, Paper Chemicals - Paper Industry
Recent years the development of China's paper industry very fast growth rate considerably higher than the world growth rate
. China's annual output in 1993 reached 18.23 million tons, ranking third in the world; in 1994 to 21.38 million tons; 2,200 tons in 1995. But China's per capita consumption of paper and paperboard remained low in 1992, 16.68 kg / year? Person; in 1994 to 17.82 kg / year? Person; in 1995 to 18.33 kg / year? People, only 1 in the world per capita consumption / 3, far below the per capita consumption in developed countries. China's paper industry problems mainly:
1. Products of poor quality, low grade; 2. Labor productivity is low; 3. The majority of enterprise technology and equipment is too outdated; 4. Enterprises small scale, the scale of production an average of less than 4,000 tons / year; 5. Fibrous materials in the proportion of wood pulp is too low, the proportion of only 25%, the proportion of straw pulp raw materials account for about 65%.
Paper industry competent authorities consider that the paper industry in the product structure, the development of products in short supply should be appropriate to offset newsprint, offset printing paper, kraft paper, cardboard, high-grade coating white paperboard, information paper, food packaging, in high-grade household paper focus on middle and low product to speed up the upgrade to letterpress paper, cigarette paper, offset paper, paint white board to focus on; in the technical structure, focus on developing high-quality, light weight and low consumption of the production technology actively research and promote the use of paper-making chemical agents.
Chemical agents on the pulp, paper and cardboard to increase the yield, improve quality, reduce pollution and increase economic efficiency and so on all play a decisive role. Therefore, chemicals in developed countries attach great importance to the paper. Paper chemicals production in Western Europe more than 13 million tons, with 76 varieties, more than 4,500 brands, worth 3.7 billion U.S. dollars.
Paper chemicals including deinking agents, defoamers, retention aids, drainage aids, sizing, reinforcing agent, coating chemicals. The past 10 years, our fine chemicals for paper making in the overall technical level has been greatly improved, from a number of large and wide view of the main varieties, the development of our country in general has a production output of up to 5 million tons, sales of 3 billion yuan. Have built a number of paper chemicals joint venture, such as Shanghai Chlor-Alkali Co., Ltd. joint venture with the U.S. HERCULES paper chemicals plant; German BASF Company and the Shanghai joint venture plant additives also include rosin and AKD emulsion made such paper chemicals. But the overall number is small, not much variety, and now only 30 varieties of 200 brands, yet the formation of specialized production, the paper industry can not meet the technical progress and product upgrading requirements.
Following a brief introduction of several major species of the situation:
A waste paper deinking agent To reduce the amount of fiber, and actively improve the utilization of secondary fiber recovery, is the current development trend of the world's paper industry is one. In recent years, fibers, raw materials accounted for 35% of paper, paper waste paper utilization rate of industrial countries more than 50%, while the present stage of the waste paper utilization rate of less than 30%. So with the development of China's papermaking industry and increase the proportion of waste paper recycling, waste paper deinking dosage will be rapid development.
Deinking methods include washing and flotation. Washing deinking technology developed earlier, the deinking agent used to sulfonate, alkyl ether, polyethylene glycol-based. My washing deinking agent in the mass production stage, the domestic main research units are: Tianjin Reagent Research Institute, Hangzhou Institute of Chemical Engineering, Hangzhou Jerry Fine Chemical Company, Tianjin detergent factory, Beijing Daily Chemical Factory III Northwest Institute of Light Industry of the other should be.
Flotation is a new technology, in Western Europe, Japan, are widely used, compared to its flotation and washing deinking effect, increase the recovery rate of 20% fiber, and wastewater treatment more economical. Flotation deinking agent used in non-ionic surfactants and cationic surfactant-based.
by: gaga
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Paper Chemicals Status And Development - Paper, Chemicals, Paper Chemicals - Paper Industry Anaheim