There are various types of polyurethane adhesives, which can be classified into the following categories based on different classification methods:
Classified by reaction composition. Including polyisocyanate adhesives, hydroxyl containing polyurethane adhesives, polyurethane resin adhesives, etc.
Classified by purpose and characteristics. This includes universal adhesives, food packaging adhesives, shoe adhesives, paper plastic composite adhesives, building adhesives, structural adhesives, ultra-low temperature adhesives, foaming adhesives, anaerobic adhesives, conductive adhesives, hot melt adhesives, pressure-sensitive adhesives, sealing adhesives, water-based adhesives, and sealing adhesives.
Classify according to component characteristics. It can be basically divided into single component reactive type, shielded type, single component non reactive type, thermoplastic and hot melt type, two-component type and water dispersed type, etc.
Classified by curing mechanism. Including single component solvent volatile type, thermoplastic polyurethane hot melt adhesive type, moisture curing type, single component thermal curing type, radiation curing type, etc.
Classify according to packaging form. Including single component, dual component, and even multi-component components.
Classify according to whether it contains (organic) solvents. Including solvent-free liquid adhesives, hot melt adhesives, solvent based adhesives, water-based adhesives, etc.
In addition, polyurethane adhesives can also be classified based on their chemical properties, physical morphology, molecular structure, etc. These classification methods provide opportunities to understand polyurethane adhesives from different perspectives, with each type having its specific application and performance characteristics.