Bending Stiffness
Physical mechanics defines structural resistance to bending deformation as a core component of fabric tactile hand and drape. The flexural rigidity of woven or knitted fabrics quantifies the couple required to bend a unit width of material through a unit curvature. This physical metric correlates directly with garment stiffness, tailoring behavior and visual drape characteristics.
Measurement Method
Standard cantilever test methods slide a strip of fabric over an inclined plane until its leading edge bends under gravity to touch a forty-one point five degree slope. Testing instruments calculate bending length and flexural rigidity from the overhang length and fabric weight per unit area. Higher numerical values indicate a stiff, rigid fabric structure, whereas lower values denote soft, pliable material.
Structural Influence
Yarn linear density, weave structure and chemical finishing treatments alter flexural resistance significantly. Heavy warp yarns, tight pick counts and resin stiffening raise flexural rigidity, making fabrics suitable for workwear or protective outerwear. Softener applications, loose knits and fine filament yarns reduce bending resistance to improve comfort in next-to-skin garments.
Garment Drape
Tailors utilize stiffness measurements to predict seam pucker and collar stand performance during garment construction. Consistent bending resistance across warp and weft directions prevents asymmetrical garment distortion.
