Natural Polymers: Covering two categories of plant-based and animal-based types. Plant-based adhesives include starch, cellulose, tannin, etc.; animal-based adhesives consist of bone glue, fish glue, blood protein glue, etc. These natural substances can be used as adhesives by virtue of their own properties.
Synthetic Resins: Classified into thermosetting resins and thermoplastic resins. Thermosetting resins include epoxy, phenolic, etc.; thermoplastic resins include polyethylene, polypropylene, etc. Among them, synthetic resins are the most widely used type of adhesive materials.
Rubbers and Elastomers: Rubbers include chloroprene rubber, butyl nitrile ethylene propylene rubber, etc.; elastomers are mainly thermoplastic elastomers and polyurethane elastomers, which also play an important role in adhesives.
Inorganic Adhesives: Such as silicates, phosphates, and phosphoric acid-copper oxide, etc. This type of adhesives provides more choices for the application of adhesives.
