Polyurethane - Hard Microcellular Elastomer

Advantages

Lowest cost/tonne, best machining and bonding characteristics compared with other thermosetting polyurethane’s.

Disadvantages

Worst wear characteristics and low maximum operating temperature and surface hardness compared with other thermosetting polyurethane’s.

Typical Properties

Property

Value

Density  (g/cm3)

0.9

Surface Hardness

SA50

Tensile Strength (MPa)

4

Flexural Modulus (GPa)

0.01

Notched Izod (kJ/m)

1.06+

Linear Expansion (/°C x 10-5)

13

Elongation at Break (%)

120

Strain at Yield (%)

N/Y

Max. Operating Temp. (°C)

70

Water Absorption (%)

10

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)

20-

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

1.7

Mould Temp. Range (°C)

NA

Applications

Shoe soles, car bumpers, tyres, wheels, gears, and fuel hose.

 

Source : Abstracted from Plascams

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

 

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