duropal - Hpl- tecHno- loGY

7.4 STRESS EQUALISATION
If two different materials are to be bonded together, tension will occur. That is why cores
need to be laminated on both sides with materials that undergo the same dimensional
changes under the influence of heat and moisture. This applies in particular if the finished
composite board is to be self-supporting and not held by a rigid construction. As the
size of the surface increases, the more attention you must pay to the type of balancers
and the density, the symmetry of the structure and the rigidity of the core.
You will achieve the best results if you use the same type of Duropal-HPL in the same
thickness on both sides. If using HPL with a film (for surface protection), make sure that
the construction is symmetrical. Cut-outs in Duropal-HPL must always be made in the
same direction of grain. Duropal-HPL must be bonded to both sides of the core in the
same sanding direction. Our balancer boards of the same thickness are ideal.
7.5 PROCESSING DUROPAL REAL METAL ELEMENTS
Processing different types of materials to make composite elements always causes tension
between the various materials. Both sides of the core material should be laminated with
the same material that has the same dimensional changes under the influence of moisture
and heat. Pay particular care to achieving a symmetrical construction if the composite
element is to be self-supporting in use. Observe the direction of the decor pattern when
processing Duropal real metal laminates. The protective film is marked with arrows in
the direction of the decor to make this easier.
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