Process Loss
The percentage of raw material lost during the transformation of paper or board rolls into finished packaging products defines the efficiency of a production facility. This convertor waste rate includes trim at the edges of the web, setup sheets used during machine calibration, damaged cores and defective units removed during quality checks. It measures the delta between the total mass of the input stock and the mass of the final shippable units.
Economic Factor
Financial margins in high volume packaging depend heavily on the minimization of material scrap. A rising convertor waste rate often indicates issues with the consistency of the substrate or mechanical misalignments in the die cutting section.
Operational Control
Modern digital monitoring systems track the disposal of offcuts and rejected blanks to identify the specific stage where the most material is lost. High speed folders and gluers require consistent board stiffness to prevent misfeeds that contribute to the convertor waste rate. When the rate climbs, technicians inspect the tension control of the unwind stand and the sharpness of the cutting blades.
Reducing this figure decreases the environmental footprint of the operation by lowering the volume of fiber sent to recycling or landfill. It also improves the accuracy of procurement forecasts for future jobs.
