TextileGlossary.com

What is "Ultraviolet Protection Factor UPF" - Definition & Explanation

The UPF rating indicates how effective a fabric is at blocking out solar ultraviolet radiation from reaching the skin. UPF ratings range from 15 to 50 with higher ratings indicating more effective blocking and therefore better protection for the wearer of a garment. Fabrics that test higher than UPF 50 are rated as UPF50+. UPF testing involves exposing a fabric to ultraviolet radiation (UVR) and measuring how much is tranmitted through the sample. Different wave-lengths of radiation in the UVR spectrum have different effects on human skin and this is taken into consideration when calculating the UPF rating. Factors that contribute to the UPF rating of a fabric are: *Composition of the yarns (cotton, polyester, etc) *Tightness of the weave or the knit (tighter improves the rating) *Color (darket colors are generally better) *Stretch (more stretch lowers the rating) *Moisture (many fabrics have lower ratings when wet) *Condition (worn and faded garments may have reduced ratings) *Finishing (some fabrics are treated with UV absorbing chemicals)

Some other terms

Some more terms:

The combination of two or more types of staple fibers and/or colors in one yarn. Blends are sometimes so intimate that It is difficult to distinguish component fibers in yarn or fabric. A highly...
Mercerized cotton is cotton thread (or cotton-covered thread with a polyester core) that has been treated with sodium hydroxide (NaOH). The thread is given a caustic soda bath that is then...
A manufactured assembly of fibres or yarns (or both) that has substantial surface area in relation to its thickness, and sufficient mechanical strength to give the assembly inherent...
Strands of YARN that are left threaded through the various parts of a textile machine and to which new strands of YARN to be processed are attached, thus eliminating the necessity for threading the...
An added section of fabric in a shirt or pants that enhances the fit. On a shirt, the yoke is usually on the back across the top shoulder area but can also be on the front shoulder to chest area. On...

Companies for Ultraviolet Protection Factor UPF:


If you manufacture, distribute or otherwise deal in Ultraviolet Protection Factor UPF, please fill your company details below so that we can list our company for FREE!