Impact resistance of flax reinforced polypropylene laminates

Flax fiber was used as the reinforcing material to commingle with polypropylene (PP) filaments,producing a core-spun yarn with the flax as core and PP filament as outer sheath.The commingled yarns were woven into 2-D fabric which was used as the prefabricated material.By hot-pressing technology the prefabricated material was shaped into laminates.The fracture mechanisms and the factors affecting the impact resistance of the laminates were studied through analyzing the test results and fracture photographs.It showed that the impact resistance of the laminates with twill weave is prior to that with plain weave made by the same technological parameters.At the same time,the resin,reinforcing fiber,the number of layers and impact velocity all exert effects on the impact resistance.