Polypropylene is a common thermoplastic resin typically used for injection molding applications. PP offers a good balance of properties and cost, uncommon to most other thermoplastics. PP provides outstanding physical, chemical, mechanical, thermal, and electrical properties not found in any other thermoplastic.
Polypropylene is made by polymerizing propylene. It has the lowest density of all plastics used in packaging. PP has high temperature resistance, with a high melting point (distortion temperature of 150 to 200°F), making it suitable for hot-fill packaging applications.
Polypropylene is highly resistant to corrosive materials, organic solvents, and degreasing agents as well as electrolytic attack. Compared to low or high density polyethylene, polypropylene has a lower impact strength, but superior working temperatures and tensile strength.
Talc-filled polypropylenes have improved rigidity, hardness, and heat resistance compared to the base resin.
- High strength
- High chemical resistance
- High melting point (150 to 200°F)
- Very low density
- Abrasion resistance
- Low-cost fabrications
- Maintenance free
- Wipes clean
- Dimensional stability
- Excellent electrical properties
- Poor impact resistance at low temperature
- Difficult to paint or bond with adhesives
- Molded surface is not smooth with glass reinforcement
- Acid Tank/Lineup
- Battery Cases
- Tank Covers
- Machines/Rinse Tubes
- Machined Parts
- Fume Hoods
- Scrub Stations
- Metal Plating Barrel
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