iMerino
Durable
Durable
The merino fibre’s ability to absorb moisture makes it more durable than most textiles, and it can be bent 20,000 times without breaking.
The structure of merino
The structure of the merino fibre is far more complex than other textiles, with many discrete components. However, it is essentially a two-phase composite material with water-impenetrable crystallites of a-keratin embedded in an amorphous matrix phase. The micro-crystallites make up around 30% of the fibre volume, and are stiff and highly elastic. The remaining matrix phase is tough when dry but softens when it absorbs moisture from the atmosphere.
The influence of moisture
When wet, a merino fibre can be extended up to 30% without damage and then recover its original dimensions completely after the load is removed (Fig 1).
This is because the elastic elements of the composite are able to undergo a reversible change from a helix to a sheet structure, with the helices progressively unfolding as the fibre is elongated between 2 and 30% (Fig 2). It’s this characteristic that helps deliver merino’s natural elasticity, drape and durability.
More durable than other fibres
Merino’s highly extensible structure allows it to be bent 20,000 times before breaking. By comparison, a cotton fibre will break after 3,000 flexures and silk after just 2,000. This means merino carpets and garments not only last longer, but also retain their appearance for a longer period.
Summary
The structure of the merino fibre is able to transform under load, giving it a durability that far exceeds other textiles.
