The Present Situation and Development of China's Mainland Adhesive Industry

Synthetic adhesives have many characteristics such as wide application, easy use, and high economic benefit. With the advancement of science and technology and economic development, synthetic adhesives are increasingly replacing mechanical connections, thereby simplifying processes, saving energy, and reducing costs for various industries. , to improve economic efficiency provides an effective way, has now become a very promising chemical industry.
1. Industry status Since the reform and opening up, China's mainland adhesive industry has made great progress and progress, and its output has grown rapidly.
1.1 Production situation Rapid growth in output and sales During the Ninth Five-Year Plan period, China's mainland adhesive industry experienced the fastest development period, with an average annual growth rate of over 12%. In 2000, the national production of adhesive sealants was 2.435 million tons. This was an increase of 7.3% over 1999, with sales of 16.6 billion yuan, an increase of 8.5% over 1999. The increase in sales exceeded the increase in output. Synthetic adhesives have become one of the fastest growing key industries in China's chemical industry.
Among the various types of adhesives produced in 2000, the production of triacetal (urea-formaldehyde, phenolic, and melamine-formaldehyde resin) and polymer emulsions was still the largest, accounting for 43.5% and 31.2% of the total output, respectively, for environmental pollution. Larger polyvinyl formal glue (ie 107 glue) production in 2000 reduced by 18,000 tons compared to 99 years, and the rate of decline was 10%.
New products, technologies, and new equipment continue to emerge, and the fields of application continue to expand In recent years, in addition to the production of some general-purpose adhesive products in China, in order to fully meet the general needs of the market, a number of copolymer type, connection type, modified type and special type adhesive products keep appearing. Such as; cross-linked polyvinyl acetate emulsion, vinyl versatate and vinyl acetate copolymer emulsion, silicone modified acrylic emulsion, one-component moisture curing polyurethane sealant, low-hardness fast-curing polyurethane building sealant, SIS hot melt pressure sensitive Many new varieties of rubber, silicone sealants, single-package epoxy resin emulsions, and single-component long-term curing epoxy structural adhesives have been developed. These products have many excellent properties and not only satisfy the market. All kinds of different needs, but also improved product quality, replacing some imports.
The fields of application of adhesives and sealants have also been continuously expanded. They have been used in industries such as wood processing, construction and packaging, and have expanded to clothing, light industry, machinery manufacturing, aerospace, electronics, advertising, transportation, medical care, and post and telecommunications. Many fields, such as warehousing, have become indispensable chemical products in the national economy and people's lives.
Adhesive production equipment has also been greatly improved and updated, new equipment and new technologies are emerging, polymerization equipment is becoming larger, polymerizer capacity from a few cubic meters to a dozen cubic meters, expanded to tens of cubic meters, polymerization operations The degree of automation continues to increase. Most manufacturers have achieved automatic meter control. Some manufacturers have also used electronic computer controls, micro-motion flow meters, electronic scales, and continuously variable stirring to greatly eliminate the influence of human factors on polymerization. , Increased production and product quality.
Our country is the production of pressure sensitive adhesives and hot melt pressure sensitive adhesives. The coating machines and cutting machines designed and manufactured by ourselves have reached a medium level with a width of 1.3-2.0M and a coating speed of up to 120-. -150 M / min, ranging, static elimination technology (electrostatic discharge tube), EPC devices, automatic tension control devices, high-sensitivity sensors, frequency modulation system and other automatic control facilities have been gradually developed and put into production operations.
1.2 Import and export situation:
According to customs statistics, in 2000 China imported a total of 171,400 tons of various types of adhesives and sealants and raw and auxiliary materials, amounting to US$294.2 million. The main products are polyurethane rubber, polyurethane sealant and sealant, and epoxy resin. Glue, high-performance silicone sealant, high-performance acrylic adhesive and pressure-sensitive adhesive, automotive plastic melt adhesive, etc. In addition, there are a considerable number of adhesive raw materials and related additives, mainly from the United States, Japan, Germany, South Korea and Taiwan and other countries and regions imported.
The export volume was 53,800 tons with a value of 72,314,300 US dollars. The main products included polyester acetate ethylene emulsion, acrylic ester glue, acrylic pressure sensitive adhesive and hot melt pressure sensitive adhesive, alpha-cyanoacrylate adhesive and anaerobic adhesive. And related raw and auxiliary materials, export countries and regions are mainly the United States, Japan, South Korea, Southeast Asia and West Asia, Taiwan and Hong Kong.
1.3 Market conditions From the adhesive supply and demand market, the general "general-purpose" adhesive supply exceeds demand, the market competition is very fierce, such as: coated with acrylic pressure-sensitive adhesive emulsion BOPP film packaging tape, used to produce general architectural coatings styrene-propylene, Vinegar and pure C type emulsion, general-purpose white latex, EVA hot melt adhesive for bookbinding wireless, general-purpose 502 instant adhesive and silicone rubber, and its equipment production capacity greatly exceeds the market demand. Between the "low-level, low-cost" competition. Even sometimes there are individual manufacturers in the product sales using shoddy, fake and shoddy and other unfair means to disrupt the normal market order and damage the interests of consumers. However, some high-performance, high-quality adhesives and auxiliaries cannot be produced or the performance and quality of products cannot meet the needs of the market.
From the adhesive consumer market, the largest demand is still the wood processing industry, accounting for about 60% of the total rubber, followed by the construction industry, accounting for about 22%, followed by the packaging and footwear industry, accounting for 6.2% % and 4%. In recent years, the widespread use of trademarks, labels, and advertising stickers has accelerated the development of such adhesives. The amount of glue used in the automotive industry and electronics and electrical appliances industry has also increased significantly.
1.4 Problems to be solved 1. At present, the production of synthetic adhesives in China is very fragmented. According to incomplete statistics, there are more than 1,800 existing production enterprises distributed in 28 provinces, municipalities and autonomous regions across the country (very few in the northwest region), but there are only a hundred manufacturers in the production scale and upper level. The state-owned and township-owned and private enterprises generally have few product varieties, and their quality and grade are not high enough to meet market needs.
2. Most production companies have aging products, slow replacement, lack of scientific research and development, product application research and after-sales services can not keep up, poor market awareness, just in some old general-purpose products to compete with each other to compete for the market price, but for some markets urgently needed The research and development of high-tech products lags behind. For example, the research and development of water-based polychloroprene and polyurethane glues has been several years, but it has not yet reached the scale of production.
3. The main raw materials and related auxiliaries of some adhesives are in short supply or cannot be produced or the quality and performance of the adhesives do not meet the market requirements. The main products are EVA, SIS, and PA (polyamide) resins for the production of hot-melt adhesives and hot-melt pressure-sensitive adhesives. TPU resin for shoes, neoprene used for neoprene production, and some auxiliaries with adhesives, must be imported from all or part of foreign countries, affecting the development of China's adhesive industry.
2. Future development 2.1 Production and sales will continue to grow rapidly In the next 5-10 years, China's mainland adhesive production and sales will continue to grow rapidly, and the output is expected to reach 3.54 million tons in 2005, and the year 2000 In contrast, the average annual growth rate was 7.8%, which was higher than the 3% growth rate of developed countries in the same period. . As the level of production technology in China's mainland continues to increase, some new products with high performance and high added value have been put into operation successively, and sales growth will be further higher than the increase in output.
2.2 Environment-friendly adhesives will become the mainstream of synthetic adhesives As environmental protection laws in China become more stringent and people’s awareness of environmental protection continues to increase, environmentally friendly adhesives are gradually becoming the mainstream of synthetic adhesive products.
1. Polyvinyl formal rubber "107 glue" and urea-formaldehyde rubber are mainly used in building decoration and wood processing industry. Because they all have problems such as high formaldehyde emission, harm to the human body and pollution to the environment, they are constrained. The Ministry of Construction of China has The following paragraphs will stop the production and use of 107 glue. Nowadays, in some large and medium-sized cities such as Beijing, Shanghai, Tianjin, etc., “Interface Agent” is gradually replacing “107” glue, eliminating the damage of free formaldehyde to the environment and human body.
For the amount of formaldehyde released from plywood made of urea-formaldehyde rubber, China is developing a national quality standard that is in line with international standards. It is being implemented by some key enterprises, and some manufacturers, especially some foreign-funded enterprises, have released urea-formaldehyde formaldehyde. It can be reduced to less than 10mg/100g, and some urea-aldehyde rubber factories with small production scale and low technical level can not meet the new national quality standards and will be eliminated.
2. Neoprene, commonly known as all-purpose adhesive, is mainly used for interior decoration, wood processing and footwear. Due to the large amount of toxic and harmful organic solvents, its application is gradually being restricted. In developed countries, the rubber used for shoes has been completely made of polyurethane. Replaced by glue and hot melt adhesives, the amount of neoprene in the footwear industry in China is also decreasing year by year.
3. Water-based adhesives, hot-melt adhesives and hot-melt pressure-sensitive adhesives do not contain any organic solvents. They are basically discharged without waste during production and use. They do not pollute the environment and are environmentally friendly products. They are currently the mainstream of adhesive development in various countries in the world. The waterborne polymers described include acrylic emulsions, polyvinyl acetate emulsions, and VAE emulsions. In 2000, the output was 759,000 tons, an increase of 11.45% over 1999, and the production of hot melt and hot melt pressure sensitive adhesives in 2000 was 5 60,000 tons, an increase of 23.4% over 1999, both of which are the fastest-growing varieties, and are expected to maintain high growth rates of 11-12% in the future.