does polypropylene melt
Effect of Heat. The melting point of polypropylene is about 165Â°C and while it does not have a true softening point temperature, the maximum processing temperature of the fibre is approximately 140Â°C. Prolonged exposure to elevated temperatures will cause degradation of the fibre, but anti-oxidants are incorporated in polypropylene fibres to protect them during processing and at normal service temperatures.