Ethylene-Propylene Copolymer - Polyallomer

May 9 2001

Polymer Type

Thermoplastic

Advantages

Better resistance to stress cracking than Polyethylene or Polypropylene.  Superior low temperature toughness compared to Polypropylene or Polyethylene.  Better fatigue resistance than Polypropylene.  Low density.

Disadvantages

Crystallisation continues for 50 hours after moulding. Low surface hardness.

Typical Properties

Property

Value

Density (g/cm3)

0.9

Surface Hardness

RR75

Tensile Strength (MPa)

26

Flexural Modulus (GPa)

0.6

Notched Izod (kJ/m)

0.15

Linear Expansion  (/°C x 10-5)

16

Elongation at Break (%)

500

Strain at Yield (%)

N/Y

Max. Operating Temp. (°C)

60

Water Absorption (%)

0.01

Oxygen Index (%)

17

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

15

Dielectric Strength (MV/m)

30

Dissipation Factor 1kHz

0.0005

Dielectric Constant  1kHz

2.3

HDT @ 0.45 MPa (°C)

93

HDT @ 1.80 MPa (°C)

54

Material. Drying  hrs @ (°C)

NA

Melting Temp. Range (°C)

200 - 230

Mould Shrinkage (%)

1.5

Mould Temp. Range (°C)

20 -  50

Applications

Wire covering, film, blow moulded bottles.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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