Developing environmentally friendly adhesives with low toxicity and non toxicity has become the main

　　Adhesives belong to organic polymer compounds. With the development of technology, various multifunctional and high-performance adhesives have been increasingly widely used in modern industrial fields and have become an indispensable material for modern industry and defense industry. There are many classifications of adhesives. From the current development and concept, the adhesive industry is developing towards energy-saving, pollution-free, low-cost, and high-performance directions. Therefore, the development of low toxicity and non-toxic environmentally friendly adhesives has become the mainstream of the adhesive industry. In the future, the development direction of adhesives should be environmentally friendly hot melt, water-based, and solvent-free adhesives. The future synthetic adhesive market will be dominated by low pollution water-based adhesives and hot melt adhesives.

　　In terms of environmental protection, environmentally friendly adhesives are divided into:

　　1. Solvent free adhesive, this type of adhesive has no solvent evaporation and will not cause environmental pollution. At present, this type of adhesive mainly includes hot melt adhesive, which is a type of solvent-free solid adhesive based on thermoplastic polymers (resins, rubber). It has the advantages of fast bonding, wide application, non-toxic, and pollution-free environmentally friendly adhesive, suitable for continuous production, easy storage and transportation.

　　2. Water based adhesives, which use water as a dispersing medium, are divided into water-soluble adhesives, water dispersible adhesives, and emulsion adhesives. The advantages of water-based adhesives include: environmentally friendly, non-toxic, non flammable, high solid content, and easy cleaning of existing application equipment.

　　3. Inorganic adhesives are a wide range of adhesives composed of inorganic salts, inorganic acids, inorganic bases, and metal oxides. Inorganic adhesive is a new type of adhesive with many varieties, which can be divided into air drying type, water curing type, hot melt type, and reactive type according to curing conditions. Most inorganic adhesives are a paste made by mixing solids and liquids, and the raw materials are readily available.

　　The development path of environmentally friendly adhesives:

　　Environmental protection is a global topic and a focal point of concern for various industries. Taking the packaging industry as an example, China's flexible packaging industry has grown rapidly in recent years, and its impact on health and environmental protection has become increasingly prominent. Among them, the use of adhesives for flexible packaging has always been one of the core issues discussed by people. Therefore, the application prospects of environmentally friendly adhesives in this industry are very broad.

　　Currently, with the increasingly strict environmental laws and the growing awareness of environmental protection among people, environmentally friendly adhesives have become the mainstream of synthetic adhesive development in China. Vigorously developing environmentally friendly adhesives such as hot melt adhesives is in line with the direction of structural adjustment in the adhesive industry and the scientific outlook on development; Adapt to the trend of the times! Hot melt adhesive technology is a vibrant new technology, material, and process that creates favorable conditions for achieving modernization (automation, high-speed, and continuous) of the national economy, with a promising future ahead.