Atmospheric Fibre Modification
Controlled levels of moisture in the weaving shed alter the physical properties of natural cellulose fibres to make them more pliable. Through relative humidity plasticization, the stiff and brittle flax yarns become flexible enough to withstand the mechanical stresses of high-speed weaving. This process relies on the hygroscopic nature of linen, which absorbs water vapor from the surrounding air.
Molecular Softening Mechanism
Water molecules penetrate the amorphous regions of the flax fibre and act as internal lubricants between the cellulose chains. This occurrence of relative humidity plasticization reduces the internal friction within the yarn and lowers its modulus of elasticity. Without this moisture, the dry linen threads would snap frequently under the tension of the loom.
Mills typically maintain a humidity level between sixty and seventy percent to ensure the flax remains in a workable state. This environmental control is the most effective way to manage the inherent stiffness of raw flax.
Production Environment Control
Precise management of the air quality prevents the yarns from becoming too dry and brittle or too damp and heavy. If relative humidity plasticization is insufficient, the resulting fabric will show numerous breaks and surface fuzziness. Air conditioning systems in the mill must be monitored constantly to account for seasonal changes in the external environment.
Consistent humidity is a primary factor in achieving high weaving efficiency and fabric quality.
