Velox® Stretch is the PBT yarn takes full advantage of the special properties of polybutylene terephthalate (PBT) fibre.
The characteristics of this yarn make it perfect for manufacturing highly comfortable garments. Freedom of motion and total comfort are the features users appreciate most since they want to feel protected but not constricted. With this new yarn it is possible to produce garments capable of maintaining a comfortable microclimate around the body. The fibre is elastic, soft and resistant and takes dye well, even when blended with other types of fi bres. Colour fastness is guaranteed for all types of usages, especially wet fastness, perspiration fastness, and decolouration resistance.
This elastic non-elastomeric yarn has high extensibility and excellent elastic recovery. It acquires these characteristics as a result of a bulking process that is three-dimensional, not only linear as it happens for ordinary elastic yarn.
Velox® Stretch is a textile yarn in all respects: it is dyeable, has good coverage because it is a textured multifi lament yarn, ductile and elastic. It is also thermoplastic and, as such, can be used to manufacture stabilized fabrics. This fi bre does not compete directly with elastomeric yarn, but it is meant to be used for new textile Products.
PBT is creating interest among stretch fabric producers, who have noticed the remarkable Performance advantages of PBT fabrics, their potentially excellent results from an aesthetic standpoint, and the ease of making garments.
The most appreciated stretch fabric features:
The two main stretch fabric categories:
By blending PBT yarns with other synthetic or natural fi laments or yarns, it is possible to obtain embossed or wavy effects, while still maintaining the degree of elasticity needed for the finishing processing. The finishing treatment, which comprises scouring, dyeing and heat-setting, is crucial in that this is the stage during which the degree of elasticity and the intensity of the effects in the fabric are controlled.
Main PBT applications for Velox Stretch