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The aim of this investigation by ExcelPlas was to further study the UV Resistance of two different supplied plastic mesh samples.  Strips of mesh that had previously undergone accelerated UV aging were re-loaded into a QLabs UV Weatherometer and exposed to a second period of accelerated UV aging. The samples were then visually inspected for chalking, discoloration, or cracking.

UV-Resistance

Accelerated weathering of a canvas sample using a Fluorescent UV Condensation apparatus was undertaken according to ASTM G154. UV accelerated weathering specimens were selected at random from the samples supplied.

Figure 1. Fluorescent UV Condensation apparatus in the Highett Laboratory, Melbourne (left).

Visual inspection of both the grey and yellow mesh samples showed some discoloration but no evidence of substantial polymer degradation.

Figure 2. Yellow Mesh sample after UV exposure showing slight discolouration (right).

Excelplas tests polymer materials and products by using UV exposure chambers. This mechanism of accelerated life ageing shows how a material will react to long term sunlight exposure where years-worth of sunlight can be simulated in days. This testing can also be conducted for paints, coatings, adhesives, sealants and many other polymeric materials.

Figure 3. Yellow Mesh sample after UV exposure showing slight discolouration (right).