Potting system for polyurethane potting

We've been using our own in-house CNC system to encapsulate our luminaires since 2017. The use of this bespoke system enables us to encapsulate our luminaires in a transparent polyurethane (PU) that is of a consistently high quality. The two components used to this end are drawn from two drums of 60 kilograms each into the system's two stainless-steel containers before the actual process of encapsulation takes place. The components in the two containers are then exposed to high vacuum to remove any moisture that might be contained in the product. The removal of the moisture in this way permits the realisation of transparent PU encapsulation that is free of annoying micro-bubbles, which in turn means that no browning effects will occur even in intensive exposure to light.

The mixing ratio for our PU is 1:1. This delivers benefits particularly in the output of smallest application quantities. The metering head is controlled by a computer interface. We're also able to control metering manually, for instance, when special luminaires need to be encapsulated.

Our NauticProfil system (NP system) is encapsulated on benches using a precision triple-axis linear robot. The robot enables us to achieve reproducibly consistent quantities and qualities for every NP light insert.

Our suppliers have provided us with the following certificates and tests for our polyurethane:

Performance list
Tests Ref. Method Test Conditions Results
Outdoor Resistance
Florida Tests SAE J 1976 Direct inland, 45° South Good (after 2 years)
Arizona Tests SAE J 1976 Direct Weathering, 45° South Good (after 2 years)
Xenon WOM SAE J 1960-89 65°C-cycle 102minUV+
18min.UV/waterspray
no color change
minimal gloss change
Weatherometer QUV-B SAE J 2020 1000h
(8hUV 60°-4hcond.50°C)
no color change
minimal gloss change
Weatherometer QUV-A SAE J 2020 2000h
(8hUV 70°-4hcond.50°C)
no color change
minimal gloss change
Water And Chemicals Resistance
Fuel Resistance G.M.6073 immersion No gloss change/
No degradation
Acid Resistance MS-CG12 Spot Test 0.5-10%conc No gloss change/
No degradation
Solvent Resistance GM 6121 M Various types of used chemicals No gloss change/
No degradation
Water Immersion WSK-M3G178 240h. @45°C No gloss change/
No degradation
Salt Spray Resistance ASTM B117-95 2000h @ 38°C 5% NaCl No gloss change/
No degradation
Humidity Resistance MS-CG12 250h @ 40°C 100%R.H. No gloss change/
No degradation
Enviromental Cycle G.M.6073 Three Cycles No gloss change/
No degradation
Heat Resistance
Heat Resistance MS-CG12 250h @ 80°C No gloss change/
No degradation
High Temperature Resistance G.M.6073 60min. @ 93°C No gloss change/
No degradation
Thermal Shock ESK-M99P16-A:3.5.5 16h. @ - 40°C+
water@70°C/10cycles
No gloss change/
No degradation
Abrasion Resistance
Stone Chip Resistance SAE J400:85 0.47L of 250-300 graded gravel fired @sample @ 480kPa in 5-10s Chipping rating 10-
No chipping to substrate
Flammability Resistance
Flammability Resistance FMVSS 302 ISO 3795 Flame self exstinguishing
Electrical Properties
Surface Resistivity ASTM D257 500V-spec. thickness 2mm 2x 10E15 Ohm
Volume Resistivity ASTM D257 500V-spec. thickness 2mm 1x 10E15 Ohm cm

The above tests apply solely in regard to the PU encapsulation mass.


We've also had our luminaires tested by an external laboratory.
Our luminaires in our NauticProfil, MiniLine and Solaris ranges have passed the following tests in compliance with the standards.

NauticProfil®
Date NauticProfil
IP6X according to DIN EN 60529:2014, chapters 13.4, 13.6 IP6X 12.06.2015 x IP65
IPX5 according to DIN EN 60529:2014, chapters 14.2.5, 14.3 IPX5 12.06.2015 x IP65
IPX6 according to DIN EN 60529:2014, chapters 14.2.6, 14.3 IPX6 12.06.2015 x IP66
IPX7 according to DIN EN 60529:2014, chapters 14.2.7, 14.3 IPX7 12.06.2015 x IP67
IPX9 according to DIN EN 60529:2014, chapters 14.2.9, 14.3 IPX9 12.06.2015 x IP69
DampHeat 60°, 95%rh based on EN60068-2-78 05.12.2017 x
DampHeat 70°, 95%rh based on EN60068-2-78 05.12.2017 x
Salt Mist Test based on EN60068-2-52 15.02.2018 x

MiniLine
Date MiniLine
IP6X according to DIN EN 60529:2014, chapters 13.4, 13.6 IP6X 05.06.2015 x
IPX7 according to DIN EN 60529:2014, chapters 14.2.7, 14.3 IPX7 05.06.2015 x IP67
IPX9 according to DIN EN 60529:2014, chapters 14.2.9, 14.3 IPX9 05.06.2015 x IP69

Solaris
Date Solaris
IP6X according to DIN EN60529:214-09, chapters 13.4, 13.6 IP6X 18.12.2017 x
IPX6 according to DIN EN60529:2014-09, chapters 14.2.6, 14.3 IPX6 18.12.2017 x IP66
IPX7 according to DIN EN60529:2014-09, chapters 14.2.7, 14.3 IPX7 18.12.2017 x IP67