Polyester - GMC

Advantages

Highest tensile strength and flexural modulus, lowest mould shrinkage and density compared with other polyester GMC’s.

Disadvantages

Significantly lower tensile strength, flexural modulus and notched izod impact strength compared with polyester SMC’s.

Typical Properties

Property

Value

Density   (g/cm3)

1.95

Surface Hardness

RM100

Tensile Strength (MPa)

32

Flexural Modulus (GPa)

7

Notched Izod (kJ/m)

0.1

Linear Expansion (/°C x 10-5)

2

Elongation at Break (%)

2

Strain at Yield (%)

N/A

Max. Operating Temp. (°C)

130

Water Absorption (%)

0.2

Oxygen Index (%)

27

Flammability UL94

V1

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

12

Dissipation Factor1kHz

0.01

Dielectric Constant  1kHz

5.5

HDT @ 0.45 MPa (°C)

260+

HDT @ 1.80 MPa (°C)

210

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

20 -  50

Mould Shrinkage (%)

0.3

Mould Temp. Range (°C)

130 - 160

Applications

Domestic appliances. Automotive accessories.

 

Source : Abstracted from Plascams

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

 

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