|Every division has its own quality control process as the products are different and the aspects that need to be checked are also different .
We have a complete and accredited laboratory where all the necessary tests are carried out in order to make sure we get a composite panel of the highest quality.
All our panels go through the following quality tests:
Peeling (adherence to aluminium)
This test measures the torque required to peel a sandwich of two layers of aluminium and polyethylene.
All our panels are within the following tolerances:
Panel length tolerance: +/- 3 mmÂ
Panel width tolerance +/- 2 mmÂ
Diagonal tolerance +/- 3 mm
Tests on the painted side of the panel
Paint testing is essential in order to guarantee a quality product, so the Quality Assurance Department at STAC Bond carries out the following tests on the painted side of the panel:Â
Film hardness by pencil test (ASTM D 3363)Â
Wolf-Wilburn pencil hardness test
The purpose of the scratch hardness tests is to determine the endurance of the resistance of coating materials or paints to scratch effects on the surface. This test is of particular value for furniture or vehicle coatering, but is also a useful aid in the development of synthetic resins or other film forming materials.
Generally, scratch hardness is measured by moving a sharp object under a known pressure over the test surface. The result may either be the value of the pressure required to scratch through the test material if a scratching tool of constant hardness is used, or the hardness of the scratching tool is varied while constant pressure is applied.
Â· Twenty pencils from grade 9B to 9H are used with a standard holder.
Â· Pencils are moved over the surface under a fixed pressure and a fixed angle - ensuring the least amount of operator error.
Â· Pencils can be easily exchanged to minimize down time during the test.