Toray: Conjugate spinning technology for fabr...

Conjugate spinning technology for fabric like Japanese paper


A polyester filament fabric that combines the softness, smoothness, and comfort of synthetic fibers with the natural feel and random unevenness of traditional Japanese paper has been developed by the fiber and textile manufacturer Toray Industries Inc., Osaka/Japan.

Unlike conventional fabrics, Camifu can match the Japanese paper features. The conjugate spinning technology, Nanodesign was used to develop a flat C cross-sectional shape that delivers a precise arrangement of 3 different polymers. It has arranged polymers with different heat shrinkage properties in special shapes on the left and right of a flat cross-section, with a soluble polymer in the fiber center.

Toray heat treated polymers on the left and right side of the fiber to bend along the fiber length. This, coupled with a flat shape, creates a unique twist and stretch. Varying the arrangement and shape of the polymer with adjacent fibers generates different torsional structures for each yarn, resulting in a yarn bundle structure containing complex voids.
A yarn bundle structure produces a random unevenness in the fabric texture so it feels like hand-made Japanese paper. Single yarns comprising polymers with different colorations and dyeability cover the fabric without aligning. Camifu is eco-friendly, as one of its polymer is recycled from film scraps.

A hollow structure inside the fiber was created by placing a soluble polymer within, augmenting yarn bundle voids from filament twisting during relaxing and weight reduction process on textile. This hollow portion imparts a lightness and resilient feel to the fabric. A precisely designed slit keeps functional agents within the fiber, making it possible to incorporate a range of features in the fabric.

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