Slats – Why use POLYCARBONATE for translucent solar slats?

PVC PC PMMA
Properties Standard Unit Value Value Value
Density DIN 53749 g/cm³ 1,41 1,2 1,19
Minimum operating
temperature
Without load °C -10 -30 -30
Maximum operating
temperature
Without load °C 70 130 70
Tensile strength DIN 53455 N/mm² 50 >70 75
Flexural strength DIN 53452 N/mm² 80 75 110
E-modulus DIN 53457 (23°C) N/mm² 3000 2500 3300
Elongation at break DIN 53455 % 20 >100 5
Impact strength DIN 53453 (23°C) kJ/m² No break No break 10
Linear expansion
coefficient
DIN 53752 mm/m°C 0,08 0,065 0,07
Hardness Shore D Shore D 85 / 90
Fire behavior DIN 4102 - B1 B1/B2 B2


PVC = Polyvinylchloride

PC = Polycarbonate
PMMA = Plexiglass

By comparing the technical features (see table) of the different synthetic materials, it is obvious that Polycarbonate is the synthetic material which has the best design to withstand high temperatures.
The solar transparent slats heat the air in the hollow rooms of the profiles to high temperatures (glass house effect).

The best choice is then the polycarbonate slats because they minimize the risk against deforming of the pool cover (better than any other synthetic material).

Polycarbonate is a thermoplastic polymer with excellent mechanical- and physical qualities. Because of its toughness and durability it is used for the production of CDs and DVDs. It is also used in the automobile industry (car headlights), in aeronautics (windows on planes) and for the production of ballistic materials (riot police shields) because this synthetic material is very hard to break.
Polycarbonate is very translucent and with the above mentioned qualities, it is very suitable for the construction sector.

Toughness: Low risk on deforming of the material, maintains its technical qualities over time
Hardness: Very well protecting against hailstones
Transparent: Improves the glass house effect of the solar design profiles