and autoclave process, 129 pultrusion, 129, 130 sodium hydroxide, 130 mechanical performances, 128 mechanical properties, 142 pretreatment process, 128 resin-rich areas, 150 resin-starved areas, 150 resin transfer moulding process, 136–138 sisal- polypropylene composites, 149 thermal and acoustic insulating properties, 142 .