Polyurethane - Semi-Rigid Foam

Aug 16 2001

Advantages

Higher flexural modulus, maximum operating temperature and HDT compared with soft microcellular polyurethane.

Disadvantages

Lowest notched impact strength and tensile strength compared with other thermosetting polyurethane’s contained within Plascams.

Typical Properties

Property

Value

Density (g/cm3).

0.8

Surface Hardness

SA70

Tensile Strength (MPa)

4

Flexural Modulus (GPa)

0.01

Notched Izod (kJ/m)

0.4

Linear Expansion (/°C x 10-5)

11

Elongation at Break (%)

150

Strain at Yield (%)

N/Y

Max. Operating Temp. (°C)

80

Water Absorption (%)

0.4

Oxygen Index (%)

24

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

12

Dielectric Strength (MV/m)

16

Dissipation Factor1kHz

0.003

Dielectric Constant  1kHz

4

HDT @ 0.45 MPa (°C)

20-

HDT @ 1.80 MPa (°C)

30

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

1.7

Mould Temp. Range (°C)

NA

Applications

Insulation, foam-in-place buoyancy.

 

Source : Abstracted from Plascams

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

 

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