Solvent-free glue, a new type of glue synthesized by a new generation of materials through advanced technology.
With the strengthening of environmental protection and safety awareness, solvent-free glue is receiving more and more attention from flexible packaging companies.
The adhesives commonly used in domestic packaging materials are mainly solvent-based polyurethane adhesives, accounting for more than 90% of composite adhesives. In contrast, in Europe and the United States and other countries and regions, water-based or solvent-free composite adhesives have been widely used in the field of food flexible packaging. In North America, water-based and solvent-free composite adhesives have accounted for nearly 60% of the flexible packaging composite adhesive market; in Europe, water-based and solvent-free composite adhesives have accounted for nearly 50% of the flexible packaging composite adhesive market. Compared with solvent-based adhesives, water-based and solvent-free composite adhesives have the advantages of no solvent residues, fast compounding speed, and energy saving.
Solvent-free composite technology originated in Europe in the 1960s, and has been rapidly developed in the environmentally friendly European and American regions. By the end of 2000, solvent-free composite products accounted for about 60% of the entire European market, and were compounded with extrusion Together, they are gradually encroaching on the field of dry composite products. Some experts predict that solvent-free compounding will eventually completely replace dry compounding and become the main production method for flexible packaging compounding.
At the same time, it is worth noting that water-based adhesives have made considerable progress in the US market. For example, the newly launched two-component Robond L water-based adhesive by Rohm and Haas Company not only maintains the advantages of single-component water-based adhesives, but also has the inherent environmental protection of water-based products and is safer for workers and food. Features. At the same time, it does not produce volatile organic compounds (VOC), does not have the problem of aromatic amine migration, and can effectively reduce the residual solvent of the printing film. In addition to packaging snack foods, it can also package liquid or irritating food and daily necessities, and Foods that require pasteurization.
