Asahi Kasei Fibers has developed spandex fiber ROICA_® DS which is dyeable with acid dye.It is a spandex (polyurethane elastic fiber) developed using Asahi Kasei’s own technology. It has the property of enhanced dyeability property with acid dyes, compared to existing ROICA.

Conventional spandex fiber cannot be dyed with acid dyes.It is prone to“crack marks” caused by undyed spandex and “glare” that makes the spandex look shiny when it is elongated, as it is a composite fiber incorporating polyamide fiber like nylon.This has resulted in degrading the quality level of fabrics.

An affinity for acid dyes is added to the polymer of this newly developed ROICA_® DS to eliminate “crack marks” and “glare.”This makes it an entirely-new type of spandex.

With this characteristic, there would be no risk of trouble when dyeing blended fabrics incorporating polyamide fiber like nylon.It makes it possible to improve reproducibility of nylon compound fibers and ROICA_® DS.Dyeing in a wide range of colors including black of course, depending on fabric specifications, is possible.