Ureka | Products | Kleiberit 707.9 PUR Hot Melt Adhesive

Product overview

Kleiberit 707.9 PU Hot Melt Cartridges provide high quality edge bonding on solid wood, HPL, PVC, veneer and duroplastic edges. This adhesive has high heat and cold resistance.

Featured properties

Heat resistance up to +150°C
Cold resistance up to - 30°C
Excellent bond strength even when exposed to steam
All of the raw materials used meet the Directive 2002/72/EG for products intended to come into contact with food

Applications

Solid wood edging
HPL edging in strips
PVC-edging, extruded/calandered, as strips or rolls (primed)
Veneer edging
Duroplastic and thermoplastic edging

Application techniques

The substrates should be freshly cut at right angles and should be free from dust. Boards and edge material have to be acclimatized to room temperature. Maintain room temperature of at least 18°C, avoid draughts.

Working temperature:

Roller application 120-160°C Reduce the temperature to approx. 100°C during work breaks. Particular attention should be paid to the accuratetemperature control when bonding HPL and solid wood edges. Work at the upper temperatures when bond and thick substrates. Low temperature reduces the wetting of the edges. Coat weight and pressures should be adjusted so that the applied adhesive pearls are slightly pressed out at the edges. Effective pressing out can be checked with a transparent test edge.

Reactive PUR hotmelts have a slightly higher green strength compared to EVA hotmelts. Therefore:
Only use recently prepared solid wood edges, with perfect fit. Curved edges are not suitable
Ensure that the base substrate has perfect edges too.
PUR hotmelt adhesives, compared to EVA hotmelt adhesives, achieve significantly closer joints.
Thick PVC edges in rolls have to be treated with care as they are under high tension.
Ensure that the press roller apply maximum pressure.

Chemical cross linking of PUR hotmelts requires moisture. Therefore sufficient air humidity has to be present during processing.

The green strength ensures that the product is durable and has a close joint and allows for further processing, such a flush milling of the edges. Thecross linking of the product, depending on the humidity will occur in 1-2 days. The final strength is reached after 7 days.