Polyester - SMC

Advantages

Good dimensional tolerance, high standard of flatness for painted articles. High flexural modulus and heat distortion temperature compared with other polyester SMC’s.

Disadvantages

More expensive than polyester DMC’s.

Typical Properties

Property

Value

Density  (g/cm3)

1.8

Surface Hardness

RM100

Tensile Strength (MPa)

70

Flexural Modulus (GPa)

11

Notched Izod (kJ/m)

0.88

Linear Expansion (/°C x 10-5)

2

Elongation at Break (%)

3

Strain at Yield (%)

N/A

Max. Operating Temp. (°C)

130

Water Absorption (%)

0.2

Oxygen Index (%)

24

Flammability UL94

V1

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

12

Dissipation Factor1kHz

0.01

Dielectric Constant  1kHz

5

HDT @ 0.45 MPa (°C)

260+

HDT @ 1.80 MPa (°C)

230

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

NA

Mould Shrinkage (%)

0.1

Mould Temp. Range (°C)

135 - 145

Applications

Switchgears, vehicle body panels, water storage tanks, aircraft parts, battery case covers for submarines, freight car door liners, water treatment equipment parts, filler frames.

 

Source : Abstracted from Plascams

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

 

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