Processing and working instructions HPL and HPL elements PR ...

PRODUCT INFORMATION
Both systems require sufficient heat to enable the subsequent post-forming. Thin DUROPAL high-pressure
laminates require only a short heating period, and must be processed correspondingly faster. With continuous
post-forming, the bending should begin at the end of the heating input. Any machine systems should
be run up to their ideal dosing before the actual post-forming procedure, since every material responds
better to a different speed and temperature. It is important that the DUROPAL HPL is exposed to uniform
heat throughout the whole cross-section before the bending process is started. The corresponding required
temperature depends on the laminate thickness, the surface texture and the bend profile.
For continual processing machines, the maximum heating output must be set at the corresponding variable
speed. Continuous post-forming should be carried out if possible using a fixed bending block.
For stationary machines, a test run should be carried out in order to determine the optimum heat effect in
relation to the bending speed. This should ideally be started at a high temperature, and the speed adjusted
accordingly. With heating rails, the initial duration should be kept short, and maintained continuously
during post-forming.
Avoid too low a temperature in order to prevent the formation of cracks. Discoloration can occur if the
temperature effects are too high, sometimes also accompanied by cracking, deformation or blistering.
Post-forming properties of DUrOPAL real metal laminates
All DUROPAL real metal laminates are produced in post-forming quality. At a thickness of 0.8 mm, a radius
of 8 mm or larger can be produced for brushed surfaces, and a radius from 10 mm upwards for smooth
surfaces.
099 PI Processing and working instructions Page 24 of 34