High Density Polypropylene

High Density Polypropylene (HDPP) Manufacturer: Titon (Pasir Gudang) / Petronas (Kratan, kawasan perindustrian Gebong) Molecular Structure:

Chemical Resistance Acids-concentrated

Good-Fair

Acids-dilute

Good-Fair

Alcohols

Good

Alkalis

Good

Aromatic hydrocarbons

Fair

Greases and Oils

Good-Fair

Halogenated Hydrocarbons

Fair-Poor

Halogens

Poor

Ketones

Good

Electrical Properties Dielectric constant @ 1MHZ

2.2-2.6

Dielectric strength (kV mm-1)

30-40

Dissipation factor @ 1 MHz

3-5 x10-4

Surface resistivity (Ohm/sq)

1013

Volume resistivity (Ohmcm)

1016-1018

Mechanical Properties Coefficient of friction

0.1-0.3

Elongation at break (%)

150-300

Hardness- Rockwell

R80-100

Izod Impact strength (Jm-1)

20-100

Abrasive resistance-ASTM D1044

13-16mg/1000cycles

Tensile modulus (GPa)

0.9-1.5, for biax film 2.2-4.2

Tensile strength (MPa)

25-40, for biax film 130-300

Physical properties Density (g cm-3)

0.90

Flammability

HB

Limiting oxygen index (%)

18

Radiation resistance

Fair

Resistance to Ultra-violet

Poor

Water absorption – equilibrium(%)

0.03

Thermal properties Coefficient of thermal expansion (x10-1K-1)

100 – 180

Heat-deflection temperature – 0.45 MPa (°C)

100-105

Heat-deflection temperature – 1.8 MPa (°C)

60-65

Specific heat (JK-1kg-1)

1700-1900

Thermal conductivity @ 23 °C (Wm-1K-1)

0.10-0.22

Upper working temperature (°C)

90-120

Lower working temperature(°C)

-10 to -60