Polyurethane - Soft Microcellular Elastomer

Aug 16 2001

Advantages

Lowest density and highest elongation at break compared with other thermosetting polyurethane’s.

Disadvantages

Highest cost per tonne, lowest maximum operating temperature and surface hardness compared with other thermosetting polyurethane’s.

Typical Properties

Property

Value

Density (g/cm3).

0.5

Surface Hardness

SA50

Tensile Strength (MPa)

7

Flexural Modulus (GPa)

0.002

Notched Izod (kJ/m)

1.06+

Linear Expansion (/°C x 10-5)

15

Elongation at Break (%)

450

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

3

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

Cushioning and packaging.

 

Source : Abstracted from Plascams

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

 

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