Certain plastics such as acrylic, Ultem, PVDF, and PTFE are inherently UV stable. However, most plastic materials exhibit color change and loss of elongation when exposed to UV light. Weathering resistance of some plastics can be improved by adding UV stabilizers or UV resistant caps to protect the base polymer.
PTFE has particularly good UV resistance because of its very strong carbon- fluorine (C-F) bond [almost 30% higher than the carbon-hydrogen (C-H) bond], which is the common side bond that surrounds the carbon (C-C) backbone in a helix and protects it.
Outdoor applications require specific traits such as UV resistance, high strength, and resistance to abrasion, mildew and often saltwater to last in all weather conditions. For indoor applications, the UV resistance becomes less important and abrasion resistance and stretch becomes more important.
PTFE, or Teflon, coatings provide protection against water, corrosion, friction, and more. In the 70 years since its discovery, a variety of industries have come to view Teflon as the go-to coating for thousands of applications.
PTFE, or polytetrafluoroethylene, is a Teflon-coated woven fiberglass membrane that is extremely durable, weather resistant and a highly sustainable building material for roofing applications. PTFE fiberglass membranes can be installed in climates ranging from the frigid arctic to the scorching desert heat with a project life in some cases exceeding 30 years.
UV and Radiation Qualities*: PTFE tubing has excellent UV resistance and weatherability, with a radiation dose threshold for PTFE at 2 7 X 104 rads. Absence of oxygen increases radiation resistance by a factor of at least 10.
For UV-resistant seams Outdoor textiles are expected to last for many years. A&E Gütermann offers a special thread made of polytetrafluorethylene (PTFE). A&E Gütermann offers a special thread made of polytetrafluorethylene (PTFE).
100% UV resistance PTFE fibers do not degrade in the presence of UV light unlike polyester and nylon. They will maintain their tensile properties indefinitely. They will maintain their tensile properties indefinitely.
PTFE features impressive heat, mechanical toughness, electrical and low friction properties, making it the material of choice for many high heat and low friction applications. PTFE plastic is available in FDA approved, electrical, mechanical, glass-filled and bearing grades.
UV Resistance Some plasticsare susceptible to attack from sunlight, in particular, the ultraviolet segmentof the spectrum. When ultraviolet attack occurs the material may have a colourshift, become chalky on its surface, and crack or craze.
PTFE sleeves used by First Light Technologies, Inc. are made from pure virgin PTFE with no fillers or additives and therefore offer exceptional properties of PTFE. The major characteristic is a upper continuous working temperature of 260°C and superior resistance to UV radiation and virtually all chemicals.
There are a number ofmethods to reduce this problem. The addition of carbon black to the polymerwill usually absorb most UV radiation. Chemical inhibitors are available forcertain plastics, which improve the UV resistance. Paint and silicone coatings can also be usedto completely cover exposed surfaces to sunlight (UV radiation).