|
POLYURETHANE
FOAMES (P.U.):
Insulation composed principally of the catalyzed
reaction products of polyisocyanate polyhydroxy components
processed with foaming gas to form rigid foam having predominantly
closed-cell structure.
It is used world wide as insulation against temperature extremes
and has been adapted as one of the best energy saving materials
in the building industry.
TYPICAL
PROPERTIES OF POLYURETHANE.
|
Property
|
Specification
|
Value
|
|
Thermal
Conductivity
|
BS
4370-PT.2 Method 7/1973
|
0.016-0.022
W/m.k
|
|
Water
Absorption
|
ASTM
C272
|
0.032-0.035
gm/cm3.day
|
|
Density
|
BS
4370 Method 2/1968
|
35-38
kg/m3
|
|
Close
cell content
|
BS
4370 Method 10/1968
|
94-96%
|
|
Compressive
strength @ 10% strain
|
BS
4370 Method 3/1968
|
130kn/m2
Parallel to thickness
|
|
Dimensional
Stability
|
BS
4370 Method 5B/1968
|
0-+0.5%
for 14 days @ 1000C
|
|
Water
Vapor Transmission
|
BS
4370 Pt. 2 Method 8/1973
|
0.033
gm/cm2. mm Hg. day
|
|
Friability
|
BS
4370 Method 3/1968
|
5.3
gm/ min.
|
|
Fire
Resistance
|
DIN
4120
|
Class
B2
|
EXPANDED
POLYSTYRENE (EPS):A cellular insulation composed
for polymerized styrene resin processed to form a rigid,
closed cell macrostructure. Normal and Flame retardant (self
extinguishing) classed are available. A composite panel
is formed using Polystremne as core material bonded with
specially formulated adhesive applied under heat and pressure
to metal facings.
TYPICAL
PROPERTIES OF POLYSTYRENE.
|
Property
|
Specification
|
Value
|
|
Thermal
Conductivity
|
DIN
52612
|
0.031-0.036
W/m.k
|
|
Water
Absorption
|
ASTM
D2842-75
|
0.0337-
gm/cm3.
|
|
Density
|
DIN
53420
|
18-20
kg/m3.
|
|
Working
Temp. Range
|
-
|
-118
to + 800C
|
|
Compressive
strength @ 10% strain
|
DIN
53421
|
100-160
kn/m2.
|
|
Tensil
Strength
|
DIN
18164
|
225-235
kn/m2.
|
|
Shear
Strength
|
DIN
53427
|
120-150
kn/m2.
|
|
Water
Vapor Transmission
|
DIN
53429
|
0.35
gm/m2 min. day
|
|
Flammability
|
DIN
4120
|
Class
B1
|
|
