PP – Polypropylene
Polypropylene is a widely used, semi-crystalline material. It has been extensively compounded to provide a wide range of properties at a wide range of costs. In general, polypropylene is a low temperature material with excellent chemical resistance. It has no known solvent at 73 F. Polypropylene is difficult to mold to extremely close tolerances.
Applications: Packaging, industrial components for fluid processing, household goods, automotive and electrical hardware.
| Tensile Strength | Flexural Modulus | Impact Strength | Max Temp. | Chemical Resistance |
|---|---|---|---|---|
| 4,500-18,500 psi | 210,000 -1,500,000 psi | 1.4-5.5 ft-lb/in notched izod | 150°-300° F | Excellent |
Advantages
- Excellent moisture resistance
- Food grades available
- Mold–in hinge possible
- Good impact strength
Disadvantages
- Degraded by UV
- Flammable (retarded grades available)
- Attacked by chlorinated solvents
Brand Names: Adell, Borealis, Celstran, Certene.