Fibres spun from two different polymers. The most common types are made from polymers which have different melting points and are used for thermal bonding. Another variant is produced from polymers which have differing solubilities.
In this case one polymer may later be dissolved out to leave ultra-fine filaments. An example is the production of suede-like fabrics. This process is also used to create crimping, in order to provide bulk or stretch.
In this case one polymer may later be dissolved out to leave ultra-fine filaments. An example is the production of suede-like fabrics. This process is also used to create crimping, in order to provide bulk or stretch.