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 GENERAL DESCRIPTION
Polypropylene is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal and electrical properties not found in any other thermoplastic. Compared to low or high density polyethylene, it has a lower impact strength, but superior working temperature and tensile strength.
GENERAL PROPERTIES
Polypropylene provides excellent resistance to organic solvents, degreasing agents and electrolytic attack. It has a lower impact strength, but its working temperatures and tensile strength are superior to low or high density polyethylene. It is light in weight, resistant to staining, and has a low moisture absorption rate. This is a tough, heat-resistant, semi-rigid material, ideal for the transfer of hot liquids or gases. It is recommended for vacuum systems and where higher heats and pressures are encountered. It has excellent resistance to acids and alkalines, but poor resistance to aromatic, aliphatic and chlorinated solvents.
FEATURES
- Lightweight
- High tensile strength
- Impact resistance
- High compressive strength
- Excellent dielectric properties
- Resists most alkalis and acids
- Resists stress cracking
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- Retains stiffness and flex
- Low moisture absorption
- Non-toxic
- Non-staining
- Easily fabricated
- High heat resistance
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| TYPICAL PROPERTIES OF POLYPROPYLENE |
| PHYSICAL |
| ASTM or UL test |
Property |
Homopolymer |
| D792 |
Density (lb/in3)
(g/cm3) |
0.0333
0.9053 |
| D570 |
Water Absorption, 24 hrs (%) |
< 0.01 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
4,800 |
| D638 |
Tensile Modulus (psi) |
195,000 |
| D638 |
Tensile Elongation at Yield (%) |
12 |
| D790 |
Flexural Strength (psi) |
7,000 |
| D790 |
Flexural Modulus (psi) |
180,000 |
| D695 |
Compressive Strength (psi) |
7,000 |
| D695 |
Compressive Modulus (psi) |
- |
| D785 |
Hardness, Rockwell |
92 |
| D256 |
IZOD Notched Impact (ft-lb/in) |
1.9 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10-5 in./in./°F) |
6.2 |
| D648 |
Heat Deflection Temp (°F/°C)
at 66 psi
at 264 psi |
210/99
125/52 |
| D3418 |
Melting Temp (°F/°C) |
327/164 |
| - |
Max Operating Temp (°F/°C) |
180/82 |
| C177 |
Thermal Conductivity
(BTU-in/ft2-hr-°F)
(x 10-4 cal/cm-sec-°C) |
0.76-0.813
2.6-2.83 |
| UL94 |
Flammability Rating |
HB |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time, 1/8” thick |
500-660 |
| D150 |
Dielectric Constant at 1 kHz |
2.25 |
| D150 |
Dissipation Factor at 1 kHz |
0.0005-0.0018 |
| D257 |
Volume Resistivity (ohm-cm) at 50% RH |
8.5 x 1014 |
| D495 |
Arc Resistance (sec) |
160 |
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Note: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control.
All values a 73°F (23°C) unless otherwise noted.
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