Instructions / Assembly
18
Weather Resistance
Though both PALSUN and PALTUF are impervious to high temperature encountered in the environment, only PALSUN
will eectively withstand the aects of solar UV radiation. The changes in optical properties of a typical 3mm PALSUN and
PALTUF sheet under accelerated weathering tests are presented in the graphs below. 100 hours of accelerated weathering
in a QUV machine are roughly equivalent to 1 year of actual outdoor exposure in Israel or in Phoenix, Arizona (USA). Please
bear in mind that changes in optical properties of PALSUN, are hardly perceptible to the naked eye.
Yellowness Index Change in 3mm Sheets
10
9
8
7
6
5
4
3
2
1
0
0 100 250 500 750 1000 1500 2000
PALSUN®
Change in Yellowness Index
Accelerated Weathering (QUV Hours)
PALTUF®
% Light Transmission Loss of 3mm Sheets
95
94
93
92
91
90
89
88
87
86
85
0 100 250 500 750 1000 1500 2000
Accelerated Weathering (QUV Hours)
PALSUN®
%Light Transmission
PALTUF®
Pedestrian bridge, part of the Trans-Milenio public transportation project in Bogotá, Columbia.