How does the melt flow index of polypropylene affect outdoor armchair manufacturing?

The melt flow index (MFI) of polypropylene plays a critical role in outdoor armchair manufacturing, as it determines the polymer's viscosity and flow characteristics during processing. A higher MFI indicates lower viscosity, allowing for easier injection molding and faster production cycles—ideal for intricate armchair designs. However, excessively high MFI may compromise mechanical strength, reducing durability in outdoor conditions. Conversely, a lower MFI enhances structural integrity but requires higher processing temperatures and pressures, increasing manufacturing costs. Manufacturers must balance MFI with UV stabilizers and additives to ensure weather resistance while maintaining optimal flow for consistent molding. Proper MFI selection directly impacts product longevity, surface finish, and production efficiency in outdoor furniture.