News

Celebrating the 50th anniversary of Lycra in high style in Verona, Italy, on October 7th, Invista also launched its new Fusion bicomponent fibre technology. Bicomponent stretch fibres produced by the conventional melt spinning route can be of the same type, either polyamide (PA) or polyester (PES), with differential shrinkage rates, or bicomponents such as PA or PES with polyurethane (PU). Their restrictions are in the low power per dtex, poorer retention of elastic properties and non-compatibility with certain other companion fibres. In the conventional dry spinning route for elastic yarns, homopolymers are spun from a solution, the PU or polyurea-urethane (PUU) products being processed at a lower temperature than that of melt spun, with higher power per denier and excellent retention of elastic properties achieved across a broad range of from 11-2,500 dtex. The new Fusion technology now provides the best of both worlds - spinning a core-sheath bicomponent via the dry spun route.