PIN FR for polypropylene fibres in different textile structures
PIN flame retardant polypropylene masterbatches were developed and tested for producing different textiles, combining phosphorus, inorganic and nitrogen components (inorganic aluminium phosphinate, phosphate ester, melamine cyanurate). Different ratios of the PIN FR components were tested for a total FR loading of 6%, in nonwoven and in knitted fabrics.
The thickness and textile structure significantly modified fire behaviour, with thicker structures showing lower fire performance because of opening up in contact with a flame. With an inorganic phosphinate / melamine ratio of 2:1, significantly improved LOI and cone calorimeter fire performances were obtained, and nonwoven 200 g/m2 polypropylene textiles achieved FMVSS302 and DIN 4102-1 standards.
“Development of a Halogen Free Flame Retardant Masterbatch for Polypropylene Fibers”, F. Rault, Polymers 2015, 7, 220-234 www.mdpi.com/journal/polymers