Flame Retardant Polyamide Fibres: The Challenge of Minimising Flame Retardant Additive Contents with Added Nanoclays

摘要: This work shows that halogen-free, flame retarded polyamide 6 (PA6), fabrics may be produced in which component fibres still have acceptable tensile properties and low levels (preferably ≤10 wt %) of additives by incorporating a nanoclay along with two types retardant formulations. The latter include (i) aluminium diethyl phosphinate (AlPi) at 10 %, known to principally the vapour phase (ii) ammonium sulphamate (AS)/dipentaerythritol (DP) system present 2.5 1 % respectively, believed condense active. chosen is an organically modified montmorillonite clay, Cloisite 25A. effect each additive analysed terms its ability maximise both filament relative 100% PA6 behaviour knitted vertical orientation. None AlPi-containing formulations achieved self-extinguishability, although presence promoted lower burning melt dripping rates. AS/DP-containing total 5.5 or less showed far superior nanoclay, fabric extinction times ≤ 39 s reduced dripping. flammability results, supported thermogravimetric analysis, been interpreted mechanism action retardant/nanoclay type.