Polyester - Laminate; Chopped Glass Filled

Aug 21 2001

Advantages

Improved moulding characteristics over continuous reinforcement.

Disadvantages

Inferior maximum operating temperature, tensile strength, flexural modulus, notched impact, heat distortion temperature and surface hardness compared to woven glass roving polyester laminates. Approximately three times more expensive than SMC.

Typical Properties

Property

Value

Density  (g/cm3)

1.4

Surface Hardness

RM90

Tensile Strength (MPa)

100

Flexural Modulus (GPa)

7

Notched Izod (kJ/m)

0.7

Linear Expansion (/°C x 10-5)

3

Elongation at Break (%)

1.5

Strain at Yield (%)

N/A

Max. Operating Temp. (°C)

125

Water Absorption (%)

0.3

Oxygen Index (%)

20

Flammability UL94

HB

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

13

Dissipation Factor1kHz

0.2

Dielectric Constant  1kHz

5

HDT @ 0.45 MPa (°C)

260+

HDT @ 1.80 MPa (°C)

215

Material Drying  hrs @ °C

NA

Melting Temp. Range (°C)

N/A

Mould Shrinkage (%)

N/A

Mould Temp. Range (°C)

N/A

Applications

Low to medium strength mouldings, such as electrical and appliance parts. Ordnance components.

 

Source : Abstracted from Plascams

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

 

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