Analysis of some special paper in China 1

2022-08-22
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Analysis of some special paper in China (1)

preface special paper generally refers to a kind of paper with a specific performance, purpose and high added value. Special paper can be roughly divided into traditional special paper and special special paper. Traditional special paper is used for special packaging, printing and decoration purposes; Special special paper requires unique processing means and special technology to manufacture. Products have unique properties and usually have small market capacity

the name of special paper was gradually spread after the 1960s, and some people call it special processing paper. It is generally believed that special paper originated from carbon free carbon paper developed by national cash register Co. in 1945. Later, other special paper was introduced continuously, which expanded people's vision and changed people's traditional view of paper. In terms of raw materials, special paper is not limited to plant fibers, but also non plant fibers such as mineral fibers, animal fibers and man-made fibers (including inorganic fibers and synthetic fibers); In terms of structure, in addition to the fiber interlacing layer, the number of coating layers is also increased; In effect, it can be copied according to the design as needed. These are all things that were not available in the past

among the more than 5000 kinds of paper in the world today, only a small number of natural plant fiber paper is wet copied directly with water as the medium, most of which are processed paper and some non plant fiber paper. To endow paper and paper products with various functions, it is not enough to only use the properties of paper raw fibers themselves, but also to use the properties of aggregates after two-dimensional planar expansion of fibers, such as pores; The original shape, appearance and physicochemical properties of paper can be changed or improved by using various functions of paper after secondary addition as the basic work of the automotive industry, such as coating, compounding, molding, denaturation, finishing and other processes

from the perspective of market development, due to the continuous progress of new technology, the life cycle of special paper changes faster and faster. Such as typing wax paper, carbon paper has been replaced by computer plate making and carbon free carbon paper; In the comparison of raw materials, such as the competition between paper and plastic, paper and non-woven fabrics, special paper may also be replaced by other materials. For example, capacitor paper is replaced by polyester film, cellophane is replaced by polyethylene film, etc. In addition to market factors, special paper has high technical requirements for raw materials, paper machines, coating machines, chemical additives (such as high molecular polymers, surfactants, waterproof agents, oil repellents, antistatic agents, flame retardants, adhesives), etc

in Taiwan, China and Japan, the paper industry has also put forward the concept of functional paper (also known as functional paper). The so-called functional paper generally refers to a kind of paper with special functions made from non plant fibers. In September, 1962, some people in Japan's paper industry established the "functional paper" Research Association, taking the development of new paper varieties as its goal

Gary Cheng, an associate professor of the school of industrial engineering at Purdue University in Japan, said in a statement: "This kind of material is even lighter than feather, and the production level is in the leading position in the world. At present, there are nearly 100 enterprises engaged in the production of special paper. In 1998, the total output of special paper in Japan was 900000 tons, accounting for about 5% of the total output of paper, and its product price is 1.2 times that of ordinary paper. In the United States and Japan, small paper mills rely on the production of various industrial paper and special household paper with multiple varieties and small batches to supply the paper with special needs alone Users can also be vibrant and develop stably

China lags behind the United States, Japan and European countries in the development and production of special paper. On the whole, there is a large gap with the advanced level of foreign countries, such as a medium-sized agricultural film factory or plastic products factory. However, through adjustment and development, optimization and innovation in recent years, a number of enterprises with complete varieties and characteristics have emerged, which have strong competitiveness in the domestic special paper market, and some products have begun to be exported. At present, domestic special paper has occupied the dominant position in the domestic market in some varieties, but in some special paper with high technical content and a certain domestic market, foreign products still occupy the dominant position

the other party faces challenges in accurately assessing product compliance; In terms of scale, compared with foreign paper giants, China's paper-making enterprises are obviously insufficient and do not have competitive advantages. Small and medium-sized enterprises are particularly limited by technology, capital and management level. Therefore, small and medium-sized paper enterprises should develop more in the direction of diversification; Moreover, small paper machines, rather than large ones, facilitate the production of multiple varieties of paper machines. Large paper machines have high output, advanced equipment, high degree of automation and low unit energy consumption, but they have large investment, high risk and poor adaptability to multi paper production. The new small paper machine has less investment, less risk, compact equipment structure and small floor area, and adopts advanced technologies such as pressure forming, direct paper drawing, hot pressing, soft calendering, which greatly improves the equipment level of the paper machine; It not only overcomes the shortcomings of the traditional small paper machine, such as low degree of automation and high unit energy consumption, but also overcomes the shortcomings of large paper machine, such as large investment and high risk, and integrates the advantages of large paper machine, such as high degree of automation, low unit energy consumption, easy operation, etc., which has a wider adaptability to paper. China's small and medium-sized paper enterprises should find another way to introduce, develop and configure new small paper machines, which can not only meet the requirements of ordinary paper production, but also produce special paper, so as to enhance market competitiveness

therefore, accelerating the development of China's own special paper and functional paper products and participating in the competition in the international market is the top priority for Chinese special paper enterprises to improve their competitiveness and product added value. The research and development of special paper in China started relatively late, but with the improvement of people's living and cultural level and the progress of science and technology, it is bound to promote the greater expansion of special paper in the field of new material application, and the prospect is very broad; At the same time, after China's accession to the WTO, economic exchanges are more frequent, which is conducive to the development of small batch special paper export market, with better prospects and more opportunities

now, I will introduce some special paper that the author operates, understands, is familiar with, and learned from various channels as follows, with a view to attracting jade and attracting the attention of scholars and enterprises in the industry to the field of special paper. Limited to the author's level, knowledge and writing time, the special paper introduced in this paper is only a small part of the existing special paper product family in the world. I hope more experts will give their opinions. The invention of papermaking is China's great contribution to mankind. It is believed that with the joint efforts of peers in the industry, China's special paper industry will get greater development, narrow the gap with developed countries as soon as possible, and add new luster to the ancient country of papermaking

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Author: Rao Qinfu

source: Beijing Zhongbao Zhiyuan Technology Co., Ltd

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