Micom offers UV testing services as part of its accelerated aging testing. UV sun exposure can be done through direct exposure i.e.: outdoor exposure or the impact of sun exposure through glass i.e.: indoor exposure. There are many test methods and two main practices for this important type of ageing process. Among others, Micom offers UV testing services to the following test methods and practices as well as many others:
|ASTM G-154 (practice)||ASTM D3451 (Powder Coatings)|
|ASTM G-155 (practice)||ASTM D3794 (Coil Coatings)|
|SAE J2412 (automotive)||ASTM D4798 (Bituminous)|
|SAE J2527 (automotive)||ASTM D5010 (Printing Inks)|
|ANSI/NEMA LD-3||ASTM D5071 (Photodegradable Plast.)|
|ASTM D-5208 (Plastic films)||ASTM D5208 (Photodegradable Plast.)|
|UL 969 (Labels)||ASTM D6577 (Paints)|
|BIFMA HCF 8.1||ASTM D6695 (Coatings)|
|MIL-STD-810G (Military)||AATCC Method 169|
|ASTM D1248 (Polyethylene)||ISO 4892-2 (Plastics)|
|ASTM D2565 (Plastics)|
For a more elaborate list of available test methods, please see: Test methods requiring the use of a QUV and Test methods requiring the use of a Xenon Arc Tester.
Use and factors to be considered:
The ultimate goal is of UV testing is to “compress time” so that we know how a product will react to sunlight as it gets exposed more and more. To do so, we want to simulate the sun on an accelerated basis; this process is called “Accelerated weathering”. Just like for any other accelerated aging process, the goal is to have the best simulation possible with the fastest aging rate possible while not inducing reactions that would not occur under normal exposure conditions. The two prevalent UV aging type of equipment used nowadays are: Xenon arc and Fluorescent light . Each technique has pros and cons and each of them can also be used with a broad variety of test conditions that can drastically change the test outcome. Xenon arc testing is mainly used to assess color/appearance changes over time as a result of indoor/outdoor exposure to UV light either directly from the sun or through glass (indoor conditions). There is no fix algorithm that allows to predict accurately what is the actual ageing rate also called “time compression factor ”. However, with Xenon arc, reasonable assumptions can be made to at least approximate orders of magnitude. For more information on time compression factor and the test parameters required see:
Fluorescent light accelerated weathering testing is mainly used to assess mechanical properties retention through exposure. This technique is used for comparison/certification purposes. However, scientific literature is clear that this technique, despite its uses, is a poor time predictor. For more information on this test method please see: ASTM G-154.
Micom also offers UVc exposure for surfaces used in healthcare environments. UVc exposure is often used as a sanitation process in healthcare environments.
Should you need help, our experts will be happy to recommend the proper test conditions: contact us.