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www.luznegra.net
www.ledprofile.es
Monomer or
polycarbonate chippings
Cover matrix
Cover cooler
Cover extrusioning
Cover cutter
“easy-ON” cover
normal cover
microprismatic cover
Expansion coefficient and material contraction
Changes in temperature can modify material structure and these changes can
be seen in aluminium and PMMA where expansion can reach 1.2mm with a
temperature of 20ºC.
PMMA can reach a linear expansion of 4mm x metre with a temperature
variation of 0 to 50ºC.
Aluminium (pure)
23.1 x 10-6 / K
Polymethylmethacrylate (PMMA)
80 x 10-6 / K
FORMULA for calculations:
∆L = α x L0 x ∆T
(Expansion coefficient x initial length x temperature change)
Polycarbonate covers (4 year guarantee) and methacrylate (2 year guarantee)
Our polycarbonate covers comply with the fire protection standard UL94:VØ and fulfil standards according to the resistance test ISO2039-2:
R120/M50. They have a thermal linear expansion coefficient in accordance to ISO 11359-2: 6.5.
They comply with standards according to Charpy impact Strength ISO 179-1:30. UV treatment stabilised in methacrylate covers.
Covers for led profile
