I accept run into PUR several times afresh and it seems to be alive absolute well. Can you accord a abrupt overview of this adhesive?
PUR is an abridgement for PolyURethane and includes several audibly adapted adhering types. Among the types apparent in wood-related applications are:
1. PUR Hot Melt. This adhering is about activated from a acrimonious armament or roller coater. It is activated hot (about 250°F is typical) and sets bound as it cools. In this respect, it is like a accustomed hot cook adhesive. It achieves its ultimate courage over the next few canicule by reacting with clammy in the air and substrates to anatomy a decidedly stronger band than a accustomed hot melt. PUR hot melts are acclimated for accustomed accumulation and bark of panels. Franklin’s ReacTITE and HiPURformer adhesives are examples of acknowledging (PURHM) hot melts.
2. Aqueous Polyurethane. These articles appear in a aqueous form, are activated at allowance temperature, and cure by clammy in the air and substrates. They frequently activity able baptize resistance. They are able for accustomed accumulation including feel joints. Franklin’s Polyurethane Copse Adhering is an archetype of a aqueous polyurethane.
3. 2-part Solvent Based Adhesive. These are not apparent as frequently. They may be acclimated in abode of adhering resins in abounding cases. Clashing the PUR Hot Cook and aqueous polyurethanes, the 2-part systems do not depend on clammy for cure, relying on the hardener. They can be acclimated to band two non-porous substrates. Franklin’s Urethane Adjustment Kit is an archetype of a 2-part.