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The Application of polypropylene

Polypropylenes offer a good balance of properties and cost unachieved by most thermoplastics.

Polypropylene offers ease of processing with excellent chemical resistance and good mechanical properties.Glass fiber-reinforced polypropylene has improved dimensional stability, resistance to warpage, rigidity and strength. Heat deflection temperature at 264 psi is increased up to 300 °F (150 °C) for 40% glass fiber reinforced polypropylene. Polypropylene’s coefficient of thermal expansion is cut in half with 40% glass reinforcement.

Glass fiber reinforced polypropylene, when utilizing a chemical coupling agent, has significantly improved tensile and flexural strengths over regular glass reinforced polypropylene.

Polypropylene with 30% chemically-coupled glass reinforcement has a 180% improvement in tensile strength over the non-reinforced polypropylene and a 50% improvement over conventional glass-reinforced grades.

Overall, chemically-coupled polypropylene improves strength characteristics without altering the moduli, heat resistance, electrical properties, or hardness.
Talc-filled polypropylenes have improved rigidity, hardness, and heat resistance compared to the base resin.