Glue or pure glue for wood and boards. Do you know its properties and advantages? How does it differ from other types of glue, such as traditional EVA?

pur tail with edges

PUR or reactive polyurethane glue is a type of glue or adhesive that offers a great result when sharpening wooden boards in improve endurance adhesion, even in the face of heat, and sealing the edge that dramatically reduces moisture advance.

For the application of PUR glue on the panel edge, requires specific machinery, and a relatively large investment, as it dries in contact with air and not when it cools as it does with most glues that furniture manufacturers apply, most of the time EVA glues. Both vacuum preservation and diffusion and dosing, similar to an ink pump, are different. Therefore, the use of PUR glue is only recommended in cases of large series production.

Advantages of pure glue

  • Moisture resistance due to better edge sealing.
  • Do not peel with heat.
  • Greater grip.
  • Greater flexibility, allowing you to perform more complex jobs.
  • Maintains adhesion to most types of surfaces, including metals, laminates and paper.
  • Reduce the sharpening time, as the glue will seal earlier, as it does not need to cool.
  • It does not deteriorate over time.
  • It is recyclable.

The major disadvantage of this type of queue is that leave adhesive residueAlthough most of them can be removed with cleaning, there may be some residue between the edge (base or plate) and the edge of the plate. This is a problem common to all types of glues used for this work and which at the moment can only be circumvented, at least from an industrial point of view, with laser gluing.