UV Stabilizer Specification or Call out

[AT0MICZ]

Hi,

I'm working on drawings for a client that needs some of its plastics UV stabilized and want to know what the best practice for this is. My options:

1. A call out beside the material grade: "UV Stabilized"
2. A compliance note: "Must pass UV Stabilization specification _______" (to which a follow up question would be: what specs govern UV stabilization performance?)

Thanks!

 

[Pud]

The easiest way is to specify the material grade(s) usable:

e.g. Quote from GE;

"Lexan 121 is a Low viscosity multi purpose grade, available in transparent, translucent and opaque colours."

"Lexan 123 is Low viscosity, UV stabilized multi purpose grade, containing release agent. Available in transparent, translucent and opaque colours

So, Lexan 123 will always be a UV stabilized product. Whether it meets your requirements is another thing of course.

H

http://www.tynevalleyplastics.co.uk

Why be happy when you can be normal?

 

[patprimmer]

The biggest problem with specifying UV resistance performance is that in nature UV light spectrum varies continuously and weathering involves more than just UV degradation.

Different resins have greatly varying performance.

Different pigments can have a dramatic influence.

Different stabilisers are required for different resins and are sacrificial.

Exposure tests on equipment with an artificial light source are consistent for QC tests but do not correlate at all well with real world performance.

Regards
Pat
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