Highlight the role of the hottest adhesive

2022-09-23
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The role of adhesives highlights

adhesives refer to non-metallic substances that can closely connect the surfaces of the same or different materials, play a transmission role, and meet certain physical and chemical performance requirements. Therefore, they are also called adhesives, adhesives and adhesives, which are called adhesives for short

adhesive is prepared with adhesive as the main agent and various curing agents, plasticizers, fillers, solvents, preservatives, stabilizers, coupling agents and other additives. Most of the earliest adhesives used came from natural substances, such as starch, dextrin, bone glue, fish glue, etc. Only using water as solvent and heating to prepare glue, it is difficult to meet the needs of various uses because of its single component and poor applicability. With the emergence of synthetic polymer compounds, people began to develop synthetic resin adhesives for various bonding occasions. In recent years, with the rapid improvement of material development level, various adhesives with stronger applicability have come out one after another, greatly enriching the adhesive market

nowadays, the application of adhesives has penetrated into all fields of the national economy. Especially in the field of packaging, adhesives can be seen everywhere. It can be said that adhesive and packaging are two independent and interdependent industries, which are driven and promoted by each other

with the continuous and rapid development of world industrialization, almost the entire industrial chain has been driven forward without reducing the energy consumption of 100 million tons of standard coal. In many cases, because adhesives can effectively replace some mechanical connections and adhesive stitching at the interface, they have become effective energy-saving materials to simplify the process, save energy, reduce costs and improve economic benefits in the packaging production process. Therefore, adhesive, as an independent industry with a complete production chain, as well as a special auxiliary industry of the packaging industry, plays an indispensable behind the scenes driving role in the production process of the entire packaging industry, and has a significant and far-reaching impact on the technological progress of packaging and related industries, as well as the R & D and updating of products. Therefore, the research, development and production of new adhesives with more guaranteed quality and superior performance has naturally become a research field and scientific research activity attracting more and more attention in the packaging industry. This has also promoted the development and expansion of the adhesive industry to a considerable extent

the rapid development of the adhesive industry has provided many new types of adhesives with excellent performance for the society, but it has also brought new pollution problems to the environment. At present, the function and application of adhesives have been widely valued, but the environmental protection problem of adhesives is often easy to be ignored. Whether environmental protection has become the bottleneck of the further development of adhesives, and solving the problem of environmental pollution has become a top priority

today, with the deteriorating environment and the increasing awareness of environmental protection and health, environmental protection is particularly important. Producers push environmental friendly green adhesives, and users are also eager to use non-toxic and harmless adhesives. The environmental requirements for adhesives are bound to be more stringent. In response to the reality of environmental degradation and the guidance of market demand changes, some enterprises and units with certain scientific research and organization capabilities have invested a lot of human and material resources in the development of new environmental protection production technologies and the production and manufacturing of products; And some enterprises that do not have the conditions also introduce more green production equipment or products with a positive attitude, in order to seize business opportunities and win the new round of environmental protection competition

at present, there are more than 1500 adhesive production enterprises in China, with more than 3000 varieties. It has become one of the key industries in China's chemical industry that allow customers to work without additional losses. Up to now, in addition to the improvement of adhesive properties, it is more important to meet the long-term development goal and vigorously develop green and environmental friendly products

driven by environmental protection, health and safety factors, polyurethane adhesives, which are widely used in shoe-making, packaging, construction, automotive and other fields, like other adhesives, have begun to develop in the direction of solvent-free, water-based and reactive hot-melt adhesives, which are environmentally friendly and have high performance, so as to gradually replace high VOC and toxic products. However, solvent based polyurethane adhesives still have some properties better than other categories, so they continue to be used in some fields, but the final replacement can only be said to be a tug of war with time

in developed countries, almost all the adhesives used in shoe making are polyurethane adhesives, the sealant used in construction mainly adopts organic silicone adhesive and polyurethane adhesive, the composite film used for packaging all adopts polyurethane adhesive, and the special adhesives such as tape also adopt polyurethane adhesive. Polyurethane adhesive is considered as one of the most promising adhesives in China because of its excellent properties

alcohol soluble polyurethane adhesive is a polyurethane adhesive with ethanol as solvent developed in recent years. Although alcohol soluble polyurethane adhesive has environmental protection advantages such as no free isocyanate monomer and reduced production cost, the development of alcohol soluble polyurethane adhesive is not optimistic, because although alcohol soluble polyurethane adhesive has taken a step in environmental protection, strictly speaking, It is not completely divided into ring impact experiments: type preserving adhesives, because ethanol is also an organic solvent. Only combined with the current market situation in China, and it is difficult to find alternative varieties for a while, alcohol soluble polyurethane adhesive will still be used as general industrial materials in the short term

in recent years, the hot melt adhesive with the fastest growing demand in China has a very promising development prospect because it does not use organic solvents, and has rapid construction and good bonding effect. In addition to the traditional EVA hot melt adhesives, the market should also actively develop new varieties of polyester and polyamide hot melt adhesives. At present, foreign companies have produced urea formaldehyde glue with low formaldehyde emission in China, and at the same time, large-scale wood processing plants have been established

at present, solvent-free adhesives, known as environmental friendly adhesives in a real sense, are widely used abroad. Solventless means that there is no solvent in the adhesive. Because there is no solvent volatilizing to the atmosphere, it will not cause pollution and harm. Most epoxy adhesives, anaerobic adhesives, cyanoacrylate adhesives, aerobic modified acrylate structural adhesives, solventless polyurethane adhesives, and light curing adhesives are solvent-free varieties. Solvent free polyurethane adhesive is suitable for various types of plastic composite packaging, and has good bonding effect on aluminum foil. Its content physical properties and high temperature cooking resistance can also be the same as that of ester soluble polyurethane adhesive, and its peel strength is high

water based adhesives are favored for their non combustible, non toxic, non polluting and product adaptability. For example, the series of water-based paste box adhesives and water-based laminating adhesives produced by Zhengzhou Youjia Packaging Technology Co., Ltd. are very popular in the market, and their sales have been good. However, the shortcomings of water-based adhesives are slow drying speed, poor water resistance, poor antifreeze, high cost and energy consumption. They will not be able to completely replace ester soluble polyurethane adhesives in the next 10 years. Therefore, in the future production and R & D process, we should increase the solid part of the water-based adhesive, speed up the drying speed, and adopt the cross-linking method to improve the drying speed and water resistance, so as to expand its application scope and market share

in the next few years, China will vigorously research, develop and develop new adhesive products with high technological content, high added value and high performance, such as waterborne polyurethane adhesive, waterborne neoprene adhesive, high-performance and high-quality pressure-sensitive adhesive and products, VAE (vinyl acetate ethylene) lotion, EVA (ethylene vinyl acetate) resin, SIS (styrene isoprene styrene) resin, etc, At the same time, we will focus on developing environment-friendly and energy-saving adhesives to follow the law of market development and the law of human survival

the adhesive industry has developed rapidly and violently since its formation. The whole industry continues to grow vigorously under the strict test of the market. At the same time, in the process of self-development and improvement, it also promotes the innovation and development of many fields of related industries, and its role is more prominent in the packaging industry

I believe there is no noise; There is no oil pollution. In the future, with the continuous progress of science and technology and the continuous R & D and creation of new technologies and new products, the cooperation between the adhesive and packaging industry will become closer, creating more social benefits and economic values for the society, driving a broader industrial chain, opening up new and refined fields, and bringing more practical convenience to the improvement of people's living standards

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