UV-C Light and Material Degradation (FR)

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English (GB)

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UV-C destroys plastics (PP, PE, ABS) rapidly. It breaks polymer chains, creating a fine micro-dust ("chalking") on the surface.

* The Risk: In a cleanroom, the UV robot isn't just sterilizing; it is creating particulate contamination (dust) from the machine housings or the room's cables.

* The Opportunity: Using UV-stabilized materials or metal shielding to protect the cleanroom classification (ISO 5/7).

Make material test!! Use EUROFINS Protocol and Test for Gloves, and ISO DN standard specific to UV-C Light and Testing IEC 60068-2-87

ASTM G224 (Published/Active)

Title: Standard Practice for Operating UVC Lamp Apparatus for Exposure of Materials.
Context: Developed by ASTM Committee G03, this practice provides the baseline for how to set up the apparatus to test materials against UV-C. It is often used in conjunction with ASTM D2565 or similar property-testing standards (tensile strength, color change) to measure the effect of that exposure.

The "Hacked" Standards (Common Practice)

Before IEC 60068-2-87, and still commonly today, labs use Solar Weathering Standards modified with UV-C lamps. You will often see reports referencing these with a note saying "modified for UV-C 254nm":

ASTM G154: Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus.
- Note: Normally for UV-A/UV-B. Labs swap the bulbs for UV-C germicidal lamps (T8/T5) but follow the G154 protocol for temperature and cycling.
ISO 4892-2 / -3: Plastics - Methods of exposure to laboratory light sources.
- Note: Similar to above, often cited for the methodology of exposure, even if the light source is changed to UV-C.

4. Industry Specific (Appliance Safety)

IEC 60335-1 (Annex T)

Context: This is the safety standard for household electrical appliances.
Relevance: Annex T specifically addresses UV-C radiation effects on non-metallic materials. If you are CE-marking a consumer device (like an air purifier), this is likely the "standard" your Notified Body will care about. It typically requires materials to withstand a specific dose (often represented as 1000 hours of continuous exposure or similar) without becoming unsafe (brittle/cracking).

UV-C Light and Material Degradation
How UV-C Light can affect some materials, and what to do.

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