Wool Physical and Mechanical Properties
topic
Properties: tenacity 1.0-1.7 g/den (dry), 0.8-1.6 g/den (wet, minimal loss), elongation at break 25-35% (highest elasticity among natural fibres), elastic recovery 99% at 2% strain, 63% at 20% strain, moisture regain 16-18% (absorbs 30% weight without feeling wet), density 1.31 g/cm³, thermal conductivity 0.05-0.06 W/(m·K) (excellent insulation), LOI 25% (flame resistant, self-extinguishing), resilience (rapid recovery from compression), and yellowing tendency under UV and alkaline conditions.
Role
Exceptional moisture absorption combined with hydrophobic surface creates dynamic moisture management (absorbs from body, releases to environment), high elastic recovery provides wrinkle resistance and shape retention, and natural crimp creates air pockets providing insulation—properties collectively defining wool's comfort and performance.
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