Pur

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Pur

Abbreviation for purine.
References in periodicals archive ?
Since PUR is a moisture-reactive adhesive, it requires atmospheric humidity to harden, and must be applied in a moisture-free environment.
While PUR adhesives may form a better bond, there are productivity and price considerations associated with their use.
"PUR adhesives are more expensive than PVA adhesives," said Mike Hawkins, used equipment sales manager with IMA-European Woodworking Machinery.
Besides price, another concern with PUR adhesives used in edgebanding is that when they are heated higher than the advised heating temperature, they can emit isocyanite vapors at the point of application.
The advanced technology in PUR adhesives has resulted in faster curing times.
"With the slower curing times of PUR adhesives in the past, woodworkers applying these adhesives would have to adjust the feed speeds of their edgebanders or lengthen the pressure zone before the bond was ready to handle machining," said Phil Herzog, product manager for Homag products at Stiles Machinery Inc.
Examples where PUR hotmelts are used in the woodworking industry include: bonding decorative mouldings, cornerblocks, base rails and mitre joints.
PUR hotmelts exhibit numerous desirable bonding features simultaneously.
PUR hotmelts cost more per pound than D other adhesives such as PVAs, conventional hotmelts, and contact cements.
Q When does it make sense to use PUR hotmelts in edgebanding applications?
Edgebanding applications are using more and more hotmelt PUR materials.
PUR is also very tolerant of the many different materials used in edgebanding: HPL, solid surface, solid surface laminates, PVC, wood veneer, and solid lumber to all core material.