Strain Recovery
Dimensional changes occur when a knitted or woven fabric returns to a stable state without the application of water or chemicals. This phenomenon, known as dry relaxation, happens when the internal tensions introduced during spinning or weaving begin to dissipate naturally over time. It represents the first stage of shrinkage that a garment experiences after being removed from the production line.
Structural Equilibrium
Mechanical energy stored in the fibres during high speed processing acts as the primary driver for these adjustments. As the fabric sits in a tensionless state, dry relaxation allows the yarns to shift toward their most comfortable geometric configuration. This process is slower than wet relaxation but remains an essential factor in determining the final cut and sew dimensions.
When a fabric roll is unwound, the sudden removal of longitudinal tension triggers an immediate but partial recovery that continues for several hours until the internal forces reach a new balance.
Storage Influence
Ambient humidity and temperature during warehouse storage affect the speed and extent of this change. Fabrics that have not reached a state of dry relaxation before being cut into garment panels may result in finished products that do not match the intended size specifications.
Inspection Standard
Quality control teams measure these changes by marking a specific area on the cloth and re-evaluating it after a set period of rest. Understanding dry relaxation ensures that a mill can provide accurate technical data sheets to garment manufacturers who require stable fabric for precision cutting.
