Adhesives stand out in the chemical industry

Adhesives are non-metallic materials that can transfer the same kind or dissimilar materials on the surface, and can meet the requirements of certain physical and chemical properties. Therefore, adhesives are also called adhesives, adhesives and adhesives, etc. For glue.
Adhesives are adhesive-based agents, formulated with various curing agents, plasticizers, fillers, solvents, preservatives, stabilizers, and coupling agents. Most of the earliest adhesives used were derived from natural substances such as starch, dextrin, bone glue, and fish glue. Only water is used as a solvent, and it is formulated into glue by heating. Because of its single composition and poor applicability, it is difficult to meet the needs of various applications. With the advent of synthetic polymer compounds, people began to develop synthetic resin adhesives for a variety of bonding applications. In recent years, with the rapid development of the level of material development, a variety of more adaptable adhesives have come out one after another, greatly enriching the adhesive market.
Today, the use of adhesives has penetrated into all areas of the national economy. Especially in the packaging field, adhesives are everywhere and everywhere. It can be said that adhesives and packaging are two intimate and independent industries that are both independent and mutually dependent. Both parties are motivated and promote each other.
With the continuous and rapid development of the industrialization of the world, it has almost driven the entire industrial chain as a whole. In many cases, adhesives are effective energy-saving materials that simplify the process, save energy, reduce costs, and increase economic efficiency in the packaging production process because they effectively replace some of the mechanical couplings and the seams at the interface. Therefore, as an independent industry with a complete production chain, and as a special auxiliary industry in the packaging industry, adhesives play an indispensable role in the entire packaging industry, and they also provide technology for packaging and related industries. Progress and product development and renewal have major and far-reaching implications. Therefore, the development and production of new types of adhesives with more guaranteed quality and superior performance have naturally become areas of research and research activities in the packaging industry that have received increasing attention. This is also a considerable extent to promote the adhesive industry's development and growth.
The rapid development of the adhesive industry itself has provided the society with many new types of rubber with excellent performance, but it has also brought new pollution problems to the environment. At present, the function and application of adhesives have received widespread attention, and the environmental problems of adhesives are often easily overlooked. Whether environmental protection has become a bottleneck for the further development of adhesives, and the solution to the environmental pollution problem has become a top priority.
In today's increasingly deteriorating environment, increasing awareness of environmental protection and health awareness, protecting the environment is particularly important. Producers are pushing for environmentally friendly green adhesives. Users are also eager to use non-toxic and harmless adhesives. The environmental protection requirements for adhesives are bound to become more stringent. In response to the reality of environmental degradation and the orientation of changes in market demand, some enterprises and units that have their own scientific research organization capabilities have invested a lot of manpower and material resources in the development of new environmentally friendly production technologies as well as the production of products; some unqualified enterprises We will also introduce more environmentally friendly production equipment or products with a positive attitude, so that we can seize business opportunities in a new round of environmental protection competitions and stabilize the winning bid.
At present, there are more than 1,500 adhesives production enterprises in China , with more than 3,000 varieties, and it has become one of the fastest-growing key industries in China's chemical industry. To date, apart from improving the performance of adhesives, it is more important to meet the long-term development goals and to develop green and environmentally-friendly products.
Under the drive of environmental protection, health and safety factors, polyurethane adhesives, which are widely used in the fields of footwear, packaging, construction, and automotive, start to be environmentally friendly and solvent-free, water-based and reactive hot-melt types, just like other adhesives. The direction of high performance is to gradually replace the high and toxic categories of VOCs. However, due to the fact that solvent-based polyurethane adhesives have some properties that are superior to other categories, they are still used in certain fields, but the ultimate replacement is only to say that it is only a sawing with time.
In developed countries, footwear adhesives are almost all polyurethane adhesives, construction sealants mainly use silicone adhesives and polyurethane adhesives, packaging composite films all use polyurethane adhesives, and tapes and other special adhesives also use polyurethane adhesives. Polyurethane adhesives are regarded as one of the most promising types of rubber in China because of their excellent properties.
Alcohol-soluble polyurethane adhesive is a polyurethane adhesive developed in recent years with ethanol as the solvent. Although the alcohol-soluble polyurethane adhesive has the advantages of free isocyanate-free monomer, lower production cost and other environmental protection advantages, alcohol-soluble polyurethane The development of adhesives is not optimistic because although alcohol-soluble polyurethane adhesives have taken a step forward in terms of environmental protection, it is not strictly environmental friendly because it is also an organic solvent. Just combining the current market conditions in China and the difficulty in finding replacement varieties, alcohol-soluble polyurethane adhesives will be used as general industrial materials in the short term.
In recent years, hot melt adhesives with the fastest growth in demand in China are not using organic solvents, and they have rapid construction and good adhesion. The development prospects are very impressive. In addition to traditional EVA hot melt, the market should also actively develop new varieties of polyester and polyamide hot melt adhesives. At present, foreign companies have produced low-formaldehyde emission urea-formaldehyde rubber in China and have also established large-scale wood processing plants.
What is widely used abroad is a solvent-free adhesive known as a truly environmentally friendly adhesive. Solvent-free means that the adhesive contains no solvent and no solvent will volatilize to the atmosphere, causing no pollution and harm. Most epoxy adhesives, anaerobic adhesives, cyanoacrylate adhesives, aerobic modified acrylate structural adhesives, solvent-free polyurethane adhesives, and light-curable adhesives are all solvent-free types. Solvent-free polyurethane adhesives are suitable for all types of plastic composite packaging. They also have a good adhesive effect for aluminum foils. The resistance to high content and high temperature cooking performance can also be the same as those of ester-soluble polyurethane adhesives with high peel strength.
Waterborne adhesives are favored for their nonflammability, non-toxicity, non-pollution, and product suitability. For example, water-based adhesive cartridges and water-based laminating adhesives produced by Zhengzhou Youjia Packaging Technology Co., Ltd. are well received by the market and sales have been good. However, the disadvantages of water-based adhesives are slow drying speed, poor water resistance, poor frost resistance, and high cost and energy consumption. It is impossible to fully replace ester-soluble polyurethane adhesives in the next 10 years. Therefore, in the future research and development process, the solid part of the water-based adhesive should be increased, the drying speed should be accelerated, and the cross-linking method should be adopted to increase the drying speed and water resistance so as to expand its application range and market share.
In the next few years, China will vigorously research and develop new adhesives for high-tech, high-value-added, high-performance adhesives, such as: waterborne polyurethane adhesives, waterborne neoprene adhesives, high-performance and high-quality pressure-sensitive adhesives, and Products, VAE (vinyl acetate-ethylene) emulsion, EVA (ethylene vinyl acetate) resin, SIS (styrene-isoprene-styrene) resin, etc., and will focus on the development of environmentally friendly, energy-saving adhesives Follow market development laws and human survival rules.
Since the adhesive industry was formed from the very beginning, the development speed has been fierce, and the entire industry has continued to grow and thrive under the strict test of the market. At the same time, in the process of self-development and improvement, it has also promoted the innovation and development of many industries in related industries. In the packaging industry, its role has become more prominent.
I believe that with the continuous advancement of technology, continuous research and development of new technologies and new products, the cooperation between the adhesive and packaging industries will become even closer, creating more social and economic value for the society and driving For a wide range of industrial links, we will open up new and refined areas and bring more practical convenience to people’s living standards.

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