U
Ultrasuede The trade name for a synthetic microfiber fabric invented in 1970 by Dr. Miyoshi Okamoto, a scientist working for Toray Industries. It's an ultra-microfiber. It is often described as an artificial substitute for suede leather. The fabric is multifunctional: it is used in fashion, interior decorating, automotive and other vehicle upholstery, and industrial applications, such as protective fabric for electronic equipment. |
Ultraviolet Degradation A common problem which occurs when many natural and synthetic polymers are exposed to sunlight. Continuous exposure is a more serious problem than intermittent exposure, since attack is dependent on the extent and degree of exposure. |
Ultraviolet Resistance A fibre’s or fabric’s ability to resist UV radiation. This can be important for the preservation of the fibre as UV rays are a cause of degradation to textile fibres. |
Undrawn Yarn Extruded man-made filament yarn not yet subjected to the drawing process that orients the linear molecules and gives strength to the yarn. |
Uneven dyeing A dyeing defect due to which a dye does not distribute equally along the piece of fabric. |
UV Absorber Any substance that absorbs ultraviolet radiant energy, then dissipates the energy in a harmless form; used in plastics and rubbers to decrease light sensitivity. |