Rapid Utilization of Waste Paper in China

The utilization and disposal of waste paper in China in the 1970s was achieved through simple cooking, sizing, beating, and washing to make or copy toilet paper and low-grade boxboard; the recycling rate of waste paper in the 1980s reached 1/4 Around the same time, a few manufacturers are also able to produce deinked pulp. Some of them also researched and explored deinking equipment and deinking chemicals and achieved certain results. In the 1990s, some large and medium-sized paper companies successively introduced deinking equipment from abroad. And technology (including the production line), and targeted improvement and innovation of waste paper deinking agent and leather paper deinking equipment, so that China's waste paper processing technology and equipment equipment level can be fully developed.

1. Some of the larger cardboard manufacturers use imported waste paper and imported deinking equipment and technology to produce high-end products. For example, Shanghai Hongwen Paper, Fujian Qingtianzhou Paper Mill, Liaoyang Process Cardboard Factory, Anhui Wuhu Dongfang Paper Mill, etc., use imported waste corrugated boxes, and use recycled pulp treated by thermal dispersion or cold screening as the core and bottom layer pulp. In the introduction of the production line or the original improvement of the paper machine, the production of kraft box cardboard and blending paper bag paper and other varieties. Not only the quality is high, but also the imported corrugated paper contains adhesives and impurities that affect the production and is prone to paper diseases. It can also be handled effectively to ensure the normal operation of the production.

2. The enterprises represented by Guangzhou Paper Co., Ltd., Ningbo Zhonghua Paper Co., Ltd. and Nanping Paper Mill have imported deinking production lines or main equipments from abroad and adopted flotation-washing synthesis method to process old newspapers and old magazine papers. . Guangzhou Paper Mill and Nanping Paper Mill used copying newsprint paper with recycled pulp; while Ningbo Zhonghua used waste paper recycled pulp as core pulp and bottom pulp, and produced coated white paperboard, all achieved good results.

3. Some domestic research institutions cooperated with production units, researched and developed deinking technology and equipment, and used the company's existing conditions to innovate and transform, and succeeded in producing small batches of waste paper recycled pulp. For example, Guangdong Zhongfa Paper Factory cooperates with the China Pulp and Paper Research Institute to produce newsprint with 100% old newspapers; manufacturers in Xuchang, Jiaozuo, Ji County, and Xinxiang of Henan Province use imported AOCC and other waste papers to copy high-strength corrugated paper and Boxboards are very effective.

4. Small and medium-sized enterprises such as Fuzhou No. 2 Paper Mill and Nanning Xinyang Paper Mill used domestic equipment and technology to dispose of old newspapers and old paperboard to produce toilet paper and low-grade white paperboard. The Hebi Paper Mill in Henan Province slightly modified the original equipment and used domestic old newspapers to produce recycled newsprint to solve the pressure of laid-off workers' re-employment; Xuchang, Yanshi’s papermaking street uses domestic waste paper to produce toilet paper; some paper in Xinmi City The factory made use of domestic old cartons to produce medium and low-grade products such as boxboard and kraft noodle paper, and achieved good results.

5. Domestic equipment manufacturers and chemical production and research units have also achieved good results in equipment performance and chemical quality through cooperation. For example, the small waste paper processing technology and waste paper deinking system developed by the Hangzhou Light Industry Research Institute and the Zhejiang Xinshi Paper Mill, and the waste paper processing equipment researched by the Liaoyang Paper Mill Machinery Plant and the Fujian Light Industry Machinery Plant have formed supporting series. Put into production; some papermaking machinery factories in Shandong also produced different types of deinking equipment, which have been purchased by manufacturers; Fujian Institute of Papermaking, Hangzhou Chemical Research Institute, Tianjin Institute of Light Industry (now renamed Tianjin University of Technology) and other units All types of deinking agents developed have also been recognized by users.

In a word, the recycling and utilization of waste paper is the general trend of the development of the paper industry today, especially in provinces such as Henan where there is a shortage of wood resources and water pollution, and it should be highly valued. The specific recommendations made by experts are as follows:

1. The purchase of waste paper raw materials should be strictly controlled, especially the import of waste paper, in the current supply channels are more, unpredictable business methods, we must act with caution. It is necessary to conduct a thorough examination of the operating waste paper suppliers to understand the true conditions of the business units, sources and historical sources of supply and sales, economic strength, and credibility.

2. For enterprises with considerable scale, strong financial strength and strong technical force, they can import foreign existing corrugated cardboard boxes, old magazine papers, and old newsprint papers, as well as import existing foreign deinking technologies and equipment (including production lines). The use of high-quality recycled pulp instead of wood pulp fibers to produce superior grades of products will not only benefit environmental governance but also significantly increase economic efficiency. For enterprises that already have straw pulp alkali recovery, they can also use imported leather recycled pulp to add straw pulp and commercial wood pulp, and copy high-grade stationery products according to the proportion. This can reduce the pollution load, save pollution control costs, and can also reduce production costs.

3. For paper mills that have been shut down or have no hope of shutting down the pollution, the paper mills can invest a small amount of capital to improve the original equipment, use domestic waste paper to produce low-grade toilet paper, ordinary corrugated paper or recycled newsprint, and can also use domestically produced imports. Pulp and paper pulp with medium-to-high-end products will probably go out of the predicament of shortage of raw materials and difficulty in pollution control and turn to a virtuous circle.

4. Some paper-making enterprises that use waste paper, especially paper made from imported waste paper, are all new attempts. Therefore, when purchasing waste paper, they should be classified and used in combination with their own equipment conditions, technical strength, and production varieties. Can use imported corrugated carton, AOCC paper to produce high-grade cardboard, high-strength corrugated paper and paper bag paper, or as the core pulp and bottom layer pulp material for producing white paperboard; use old newspapers and add about 30% of the old magazine paper, after flotation - After washing and integrated deinking, the production of newsprint or white pulp core pulp and the bottom lining; the use of imported office waste paper, such as copy paper, computer printing paper, etc., choose a new deinking method, improve the paper machine Or the introduction of the production line, the production of high-grade sub-cultural printing paper; the purchase of domestic waste paper can produce low, mid-range boxboard and toilet paper; while using recycled paper to make recycled paper, should pay attention to the use of chemical additives to Strengthen the lack of indicators such as physical strength of paper products.

5. Domestic machinery manufacturers, chemical manufacturers, paper-making companies, scientific research institutes and other related companies united to jointly develop advanced deinking equipment, deinking agents, reinforcing agents and other chemical crystals, and continuously improve the level of equipment and equipment that utilize recycled paper for recycling. Adapt to the performance of paper varieties and promote the rapid development of waste paper utilization.