Polyurethane – Structural Foam

Advantages

Lowest water absorption and mould shrinkage, best arc resistance, flow and flexural modulus/unit cost compared with other thermosetting polyurethane’s.

Disadvantages

Worst fatigue index and machining characteristics compared with other thermosetting polyurethane’s.

Typical Properties

Property

Value

Density (g/cm3).

0.6

Surface Hardness

SA95

Tensile Strength (MPa)

20

Flexural Modulus (GPa)

0.9

Notched Izod (kJ/m)

1.06+

Linear Expansion (/°C x 10-5)

12

Elongation at Break (%)

10

Strain at Yield (%)

N/Y

Max. Operating Temp. (°C)

80

Water Absorption (%)

0.2

Oxygen Index (%)

24

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

12

Dielectric Strength (MV/m)

16

Dissipation Factor1kHz

0.003

Dielectric Constant  1kHz

6

HDT @ 0.45 MPa (°C)

130

HDT @ 1.80 MPa (°C)

65

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

0.6

Mould Temp. Range (°C)

NA

Applications

Housings and panels.

 

 

Source : Abstracted from Plascams

For more information on Plascams please visit The Rubber and Plastics Research Association