Polypropylene
Polypropylene
Properties
- Economical
- Resistant to organic solvents, degreasing agents and electrolytic attack
- Lightweight, semi-rigid
- Resistant to staining
- Low moisture-absorption rate
- Heat-resistant
- High tensile strength
- Impact-resistant
- High compressive strength
- Retains stiffness and flex
- Easily fabricated
Common uses
- Chemical-resistant tanks and linings
- Laboratory consoles, sinks and ducts
- Plating barrels and tanks
- Lavatory partitions
- Filter press plates
- Railroad crossing components
- Pump components and housings
- Prosthetic devices
- Die-cutting pads
- Clean room walls, floors and ceilings
Polypropylene
Material Specifications
| ASTM or UL test | Property | Homopolymer |
Physical |
||
| D792 | Density (lb/in3)/(g/cm3) | 0.033 (0.905) |
| D570 | Water absorption, 24 hrs (%) | <0.01 |
Mechanical |
||
| D638 | Tensile strength (psi) | 4,800 |
| D638 | Tensile modulus (psi) | 195,000 |
| D638 | Tensile elongation at break (%) | 12 |
| D790 | Flexural strength (psi) | 7,000 |
| D790 | Flexural modulus (psi) | 180,000 |
| 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°) | 210/99 |
| D3418 | Melting temp (F°/C°) at 264 psi | 327/164 |
| - | Max operating temp (F°/C°) | 180/82 |
| C177 | Thermal conductivity (BTU-in/ft²-hr-°F) |
0.76–0.81 |
| UL94 | Flammability rating | H-B |
Electrical |
||
| D150 | Dielectric constant at 1 KHz | 2.25 |
| D150 | Dissipation factor at 1 KHz | 0.0005–0.0018 |
| D150 | Dielectric strength at 1KHz | 500–660 |
| D495 | Arc resistance (sec) | 160 |
| D257 | Volume resistivity (ohm/cm) at 50% RH | 8.5 x 1014 |
These are typical values for reference and comparison only. They should not be used as a basis for design specifications or quality control. Contact us for the manufacturers’ complete material property datasheets. All values were taken at 73°F (23°C) unless otherwise noted.
Don’t see what you’re looking for? Call us at 800–423-2769 or email us at tom@crownplasticsinc.com.
