Finishing Adjustment
Dimensional shrinkage occurs horizontally as a textile enters the cooling and winding phase after passing through a heated drying machine. Calculating stenter width contraction allows operators to overfeed or over-stretch the fabric so it lands at exactly the right specified width. Every fibre type responds differently to this release of mechanical tension once the pins or clips let go of the fabric edge.
Measurement Factor
Verification of final dimensions takes place at the end of the frame once the fabric has reached ambient temperature. Unmanaged stenter width contraction leads to garment panels that are too small to meet the cutting patterns in the sewing room. Adjusting the chain speed and heat level can minimize the amount of contraction observed during a production shift.
Commercial Margin
Mills record the percentages of contraction for every unique fabric construction to ensure repeatable results between batches. If the stenter width contraction is higher than predicted, the resulting roll will be too dense and the mass per square meter will exceed the contract limits. This measurement provides the final checkpoint before the cloth is rolled for shipment.
Operational Scope
Effects are localized to the width direction and are largely independent of any lengthwise shrinkage occurring simultaneously. Control is maintained until the fabric leaves the machine exit sensors.
