Views: 1454 Author: Site Editor Publish Time: 2021-07-06 Origin: Site
PUR adhesives are reactive polyurethane hot melt adhesives. However, where PUR adhesives differ, is that they react with the moisture in the air and continue to cure over the next 24-48 hours, providing a much stronger bond than traditional hot melts.They are one-part synthetic specialty adhesives with the strength of structural adhesives, but with the application speed of hot melts. Similar to regular hot melts, PUR adhesives are heated until they reach a liquid state, applied to your substrates, and the bond is created as the adhesive cools.
Depending on the application, they can be either sprayed or extruded, with guns or bulk dispensing equipment.PUR hot melts come in the form of a cartridge or a slug, and because of their reactive properties, must be heated and applied by special PUR hot melt equipment. Guns are used for smaller applications and are more affordable and easy to use. PUR adhesives are used in applications where high strength and plasticizer resistance is needed, for permanent applications, and for difficult-to-bond substrates. They can bond many substrates including wood, fabrics, leather, metals, glass, ceramics, and some plastics such as polystyrene and polyacrylic. These adhesives are used in many applications across many industries including automotive, filter, door, window and floor manufacturing, textile and panel assembly, woodworking and edgebanding, home repair, bookbinding and even packaging applications.Bulk equipment is used for automated or high volume dispensing applications, but is more expensive, harder to use, and provides less movement and application freedom.