Finishing
The engraving fixes the dose. Peel strength follows the number of dots and stiffness follows their size.
— g/m2
After transfer efficiency and solids
The cavity is treated as a cylinder, which suits a flat-bottomed engraving and overstates a conical or tapered one by up to a third; where the roller specification quotes a volume in cubic centimetres per square metre, use that figure directly and treat this geometry as a cross-check rather than the other way round. Transfer efficiency is the loosest input in the calculation and the one that moves add-on most: it depends on adhesive viscosity at the nip, roller temperature, substrate absorbency and nip pressure, and a value taken from a supplier data sheet for a different fabric is a guess. Measure it once on the real construction by weighing before and after, and the whole model becomes reliable. Bonded area is computed as the plan area of the cavities and therefore describes the adhesive footprint at the moment of transfer; a hot melt that flows under the nip bonds more area than this and stiffens more with it, which is why the same engraving gives a softer laminate at a lower nip temperature. Nothing here predicts peel strength, which depends on adhesive chemistry, substrate surface and dwell as much as on quantity - the geometry tells you what you applied, not what it will hold.
Dot Lamination Adhesive Add-On & Bonded Area — free, with the formula and a worked example, at Textile School.