Polypropylene - PP Fire Retardant

Sep 6 2001

Polymer Type

Thermoplastic

Advantages

Flame retardant additives have excellent compatibility with polypropylene, therefore good long-term protection. Available in coloured formulations. Low flame starting and propagation velocity, compared with unmodified PP.

Disadvantages

During processing, melt temperature should not exceed 230°C (445°F). Not suitable for contact with food. Reduced notched izod impact strength and significantly reduced elongation at break compared with unmodified PP.

Typical Properties

Property

Value

Density (g/cm3)

1.2

Surface Hardness

RR97

Tensile Strength (MPa)

25

Flexural Modulus (GPa)

1.8

Notched Izod (kJ/m)

0.05

Linear Expansion  (/°C x 10-5)

9

Elongation at Break (%)

15

Strain at Yield (%)

6

Max. Operating Temp. (°C)

100

Water Absorption (%)

0.01

Oxygen Index (%)

28

Flammability UL94

V0

Volume Resistivity (log ohm.cm)

14

Dielectric Strength (MV/m)

23

Dissipation Factor 1kHz

0.002

Dielectric Constant  1kHz

2.5

HDT @ 0.45 MPa (°C)

110

HDT @ 1.80 MPa (°C)

70

Material. Drying  hrs @ (°C)

NA

Melting Temp. Range (°C)

210 - 290

Mould Shrinkage (%)

1.1

Mould Temp. Range (°C)

20 -  60

Applications

Domestic water pipes and fittings. Electrical components, fan heater cases, television back covers.

 

Source : Abstracted from Plascams

For more information on Plascams please visit RAPRA Technology Ltd.

 

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Related Books

  • EU Regulation of Chemicals REACH
  • Practical Guide to Polypropylene
  • Fire Properties of Polymer Composite Materials

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