|
|
Polypropylene Specifications
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.
see also datasheets for:
Propylux Static-Control Polypro |
Propylux HS Heat Stabilizied Polypro |
TecaPro MT |
FlameTec Polypro
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 resistant • High compressive
strength • Excellent dielectric properties • Resists most alkalis and acids
• Resists stress cracking • Retains stiffness and flex • Low moisture
absorption • Non-toxic • Non-staining • Easily fabricated • High heat
resistance
FABRICATION TECHNIQUES
• Hot gas welding • Spin welding • Fusion & butt welding • Machining with
wood or metal working tools • Vacuum forming • Ultra-sonic sealing
THERMO-FORMED APPLICATIONS
• Chemical resistant tanks & linings • Laboratory consoles, sinks &
ducts • Plating barrels & tanks • Lavatory partitions • Filter press plates
• Railroad crossing components • Pump components & housings • Prosthetic
devices • Die cutting pads • Clean room walls, floors & ceilings
| TYPICAL PROPERTIES of POLYPROPYLENE |
| ASTM or UL test |
Property |
Homopolymer |
Co-Polymer |
Flame
Retardant |
| PHYSICAL |
| D792 |
Density (lb/in³)
(g/cm³) |
0.033
0.905 |
0.033
0.897 |
0.035
0.988 |
| D570 |
Water Absorption, 24 hrs (%) |
<0.01 |
0.01 |
0.02 |
| MECHANICAL |
| D638 |
Tensile Strength (psi) |
4,800 |
4,800 |
4,300 |
| D638 |
Tensile Modulus (psi) |
195,000 |
- |
- |
| D638 |
Tensile Elongation at Yield (%) |
12 |
23 |
28 |
| D790 |
Flexural Strength (psi) |
7,000 |
5,400 |
- |
| D790 |
Flexural Modulus (psi) |
180,000 |
160,000 |
145,000 |
| D695 |
Compressive Strength (psi) |
7,000 |
6,000 |
- |
| D695 |
Compressive Modulus (psi) |
- |
- |
- |
| D785 |
Hardness, Rockwell R |
92 |
80 |
- |
| D256 |
IZOD Notched Impact (ft-lb/in) |
1.9 |
7.5 |
0.65 |
| THERMAL |
| D696 |
Coefficient of Linear Thermal Expansion
(x 10 -5 in./in./°F) |
6.2 |
6.6 |
- |
| D648 |
Heat Deflection Temp (°F / °C)
at 66 psi
at 264 psi |
210 / 99
125 / 52 |
173 / 78
110 / 43 |
106 / 41
57 / 14 |
| D3418 |
Melting Temperature (°F / °C) |
327 / 164 |
327 / 164 |
327 / 164 |
| - |
Max Operating Temp (°F / °C) |
180 / 82 |
170 / 77 |
180 / 82 |
| C177 |
Thermal Conductivity
(BTU-in/ft²-hr-°F)
(x 10 -4 cal/cm-sec-°C) |
0.76-0.81
2.6-2.8 |
-
-
|
-
-
|
| UL94 |
Flammability Rating |
HB |
n.r. |
V-O |
| ELECTRICAL |
| D149 |
Dielectric Strength (V/mil) short time, 1/8" thick |
500-660 |
475 |
500-650 |
| D150 |
Dielectric Constant at 1 kHz |
2.25 |
2.2-2.36 |
2.3 |
| D150 |
Dissipation Factor at 1 kHz |
0.0005-0.0018 |
0.0017 |
- |
| D257 |
Volume Resistivity (ohm-cm) at 50% RH |
8.5 x 10 14 |
2 x 10 16 |
10 15 |
| D495 |
Arc Resistance (sec) |
160 |
100 |
- |
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. Contact us for
manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.
|
