Single-component PU adhesives: These adhesives require no additional hardener and can be used directly. Curing is triggered by moisture in the air or heat. Single-component PU adhesives are easy to use and suitable for rapid bonding applications.
Two-component PU adhesives: These consist of a base agent and a hardener, which must be mixed in the correct proportions before use. The curing process of two-component PU adhesives is chemically controlled, resulting in higher bond strength, making them suitable for applications with stringent performance requirements.
Water-based PU adhesives: These use water as the dispersion medium, offering better environmental friendliness and lower volatile organic compound (VOC) content. Water-based PU adhesives form the adhesive layer as moisture evaporates during the drying process.
Solvent-based PU adhesives: These contain organic solvents, resulting in fast drying and good bonding performance. However, proper ventilation is necessary during use to prevent solvent evaporation and environmental impact.
