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You searched in Glossary Terms for [U]. We found 11 matching entries.
UHMWPE:
ultra-high molecular weight polyethylene.
Last referenced in:
Global apparel markets: product developments and innovations, 4th quarter 2013
ULPA:
ultra-low penetration air (filtration).
Last referenced in:
The world nonwovens industry: 20 medium sized producers, part 2 of 3, 2013-14
Ultraviolet protection factor (UPF):
a measure of the amount of protection against ultraviolet radiation to human
skin provided by an item of clothing. UPF is similar in concept to the sun
protection factor (SPF) which is used to categorise sun creams and lotions.
However, SPF is more precise.
Ultraviolet stability (geotextiles):
the ability of a geotextile to retain strength upon exposure to ultraviolet light
over a specified period.
Unit production systems:
an advanced apparel manufacturing system in which a single garment is progressed through a sequence of operations. Using a unit production system, a garment is automatically transported via a computer-controlled overhead hanging system, which has been ergonomically designed to reduce the amount of handling of the garment (see also progressive bundle system).
UPF:
ultraviolet protection factor. The UPF of a fabric is defined as the amount of UV radiation transmitted through air divided by the amount of UV radiation transmitted through the fabric. A UPF rating of 100 indicates that 1/100th of the UV radiation which hits the fabric can reach the skin.
UPS:
see unit production systems.
Last referenced in:
Trade and trade policy: leading clothing suppliers to the USA
Uptwisting:
a system of twisting one or more yarns by withdrawing them over-end from a rotating package. Uptwisting forms the second stage in two-stage twisting.
UV:
ultraviolet.
UVA:
UVA (alpha) is long-wave UV (ultraviolet) radiation which penetrates deep into the skin. UVA radiation ranges from 315 to 400 nanometres (nm) in wavelength, and is known to cause skin cancer, skin blotching, wrinkles and premature ageing of the skin.
UVB:
UVB (beta) is short-wave UV (ultraviolet) radiation which ranges from 280 nm to 315 nm in wavelength. UVB radiation is much stronger than UVA radiation, and affects mainly outer skin layers. It is the most common cause of sunburn, but it also contributes to premature ageing of the skin, wrinkles and skin cancer.