How does the melting point of polypropylene affect its suitability for fire-prone regions?

The melting point of polypropylene (PP), typically ranging between 130°C and 171°C, plays a critical role in determining its suitability for fire-prone regions. As a thermoplastic polymer, PP softens and melts when exposed to high temperatures, which can compromise structural integrity during a fire. In areas with high fire risks, materials with higher thermal resistance are preferred, as they maintain stability longer under heat stress. While PP is lightweight and chemically resistant, its relatively low melting point makes it less ideal for applications requiring prolonged fire resistance, such as construction or electrical insulation in wildfire-prone zones. However, flame-retardant additives can enhance its performance, delaying ignition and reducing flammability. Understanding these limitations helps engineers and designers select safer alternatives or modify PP for improved fire safety.