Covalp.com is online !


Check out our new toolbox for bioriented film production!
You will find different calculators to help you to adjust and set your line :

  • Output test : check extrusion sample weight to measure extruder output
  • Airspeed : measure static pressure inside tender ducts and convert to air speed
  • Energy : calculate kW by measuring flow and temperature difference
  • Specific energy : calculate the mechanical specific energy of your extruder
  • Speed calculation : adjust your line speeds to get correct thickness
  • Stretch Ext CR : calculate stretching ratio between die and chill roll as a reference
  • Stretch TDO : be sure your tender profile is correct with acceptable rail angles
  • Winder : check your maximum length on jumbo, winding density (film/air) and output

More tools to come! Please give us your feedback and requests