What are the different types of abrasive bonds used in coated abrasives?
• Glue – A system where both coats are made of animal glue is used when the strength of the bond is not an important factor, such as with lightweight papers and materials. • Phenolic Resin – This system uses full phenolic resin for both coats. It is designed to withstand moisture and heat during application and is the most durable adhesion available. • Resin over Glue – A system where the make coat is animal glue, and the size coat is either urea or phenolic resin. It is used when more strength and heat resistance is necessary. • Urea Resin – Both coats are resin-based in this system. Urea resin withstands more frictional heat than normal glue adhesives, but not as much extreme heat as phenolic resin.
