Architect and Builder Magazine South Africa March/April 2015 | Page 7

High Pressure Injected Polyurethane

Insulated Panels
POLYURETHANE PANEL INFORMATION
Characteristics of Injected Polyurethane
When it comes to selecting the best overall insulation
product for walls, ceilings and roofs, polyurethane is
the best product of choice. No other foam insulation
has the perfect combination of features that are so
important for long term performance.
The following are among the characteristics of
Injected Polyurethane:
• Delivers the highest R-Value per inch of thickness
• Delivers the lowest K-Value per inch of thickness
• Is moisture resistant & water repellent
• Possesses dimensional stability
• Demonstrates excellent performance in fire tests
• Conforms to DIN 4102 BS Fire Rating
• High load-bearing capacity
• Excellent resistance to abrasion
• Resistant to solvents, oils, ozone and water
• Outstanding resilience
• Good electrical characteristics and properties
• Resistant to mildew, mould and fungus
• Good machining characteristics
• High cut resistance and tear strength properties
• Excellent insulating efficiency over a wide
temperature range
• PU does not melt or drip when heated
• PU does not produce spread of flame within the
core, nor does it add to the severity of the fire
• PU insulation products are thermo set, which
means that once manufactured, it is rigid, will not
soften or melt and remain strong, even at elevated
temperatures
• PU can withstand elevated temperatures without
losing its insulating power
• High strength to weight ratio and load bearing
properties
• Excellent adhesion to substrates
• Conforms to requirements of the Montreal Protocol
IMPORTANCE OF POLYURETHANE METAL
FACED PANELS IN INDUSTRIAL BUILDINGS
For economic and legal reasons, it is essential to
improve thermal insulation in almost all areas of
building, civil engineering, industrial engineering, plant
construction, refrigeration, cooling technology and
district heating supply.
Energy conservation, safety in building physics and
high economic demands are prerequisites nowadays for
insulation in all areas of application. The best possible
properties are therefore demanded of insulating
materials and designs, such as were previously only
required in very extreme areas of application.
Building elements for roofs and façades with a
polyurethane rigid foam core between metal facings
offer high structural strength combined with an

excellent insulation which fulfil economic requirements
for industrial buildings.
A wide field of applications for different buildings has
been opened up by the properties of the PUR sandwich
panel. These include insulation capacity, mechanical
strength and fire behaviour.
THESE BUILDING PANELS ARE WIDELY USED
TODAY ON FAÇADES AND ROOFS FOR:
• Industrial buildings for production and storage
• Warehouses and freezer storage facilities
• Airport buildings
• Sport & leisure facilities
• Classrooms for schools, ablution & office buildings
• Insulated roof panelling
FIRE BEHAVIOUR
The success of the metal faced PUR panel is
connected to those superior properties, such as
insulation and mechanical resistance. But as PUR
rigid foam is an organic material and therefore a
combustible product, there may be certain concerns
regarding risks in the case of fire. Assessment of the
fire performance of combustible products is based on
ignitability and spread of flame tests. PUR rigid foam
fulfils the relevant fire classification requirements
currently in force in countries all over the world. As
PUR rigid foam is a thermosetting material, it does
not melt nor does it form droplets. This is an important
feature which assists in avoiding possible fire initiation
by those droplets, especially roof applications.
DALUCON HAS 2 HIGH PRESSURE INJECTED
POLYURETHANE PRESSES:
• High pressure injected
• 40KGm3, density on all our panels
• 40mm up to 125mm in panel thickness
• Panel length from 2.4m up to 13.5m. Presently the
longest PU Press in SA
• IBR roofing panel with