Convert Roll OD to kg
Formula = pi x h x (R² – r²) x film density / 1000000
pi = 3.14
h = film / web / roll width
R² = square of Roll OD Radius (R = OD/2)
r² = square of Roll ID Radius (r = ID/2)
film density = BoPP 0.91, Pet 1.4, Foil 2.7
Raw Material Calculation & Costing is one of the main requirements for any Flexible Packaging job. Be it as simple as Mono Layer (BoPP) or 2 ply job of (Bopp + BoPP).
Without doing Raw Material Calculation and Costing one can never get the idea of final Laminate Cost Price for the company.
Same Excel sheet one can use to Calculate various structure of final Laminates.
– BoPP 20 Micron + BoPP 20 Micron
– Polyester Film 12 Micron + LDPE 40 Micron
– Polyester Film 12 Micron + Aluminum Foil 7 Micron + LDPE 40 Micron
List is endless.