Preparation of flame retardant basalt fiber fabric/polylactic acid composite

The hot pressing molding process was used to prepare flame retardant basalt fiber fabric/polylactic acid composite,and the influences of the mass fraction of polylactic acid,hot pressing pressure and temperature,and flame retardant agent mass fraction on the tensile strength,bending strength and limiting oxygen index of the composite were examined.Through orthogonal experiments,range analysis and single factor analysis,the optimal process conditions for making the composite were obtained as follows: mass fraction of flame retardant agent 30%,mass fraction of polylactic acid 64.6%,hot pressing pressure 5 MPa,and hot pressing temperature 185 ℃.The results showed that although the mechanical properties of the basalt fiber fabric/polylactic acid composite prepared with addition of flame retardant agent magnesium hydrate reduced slightly,they were still better comparatively,and its limiting oxygen index could be increased up to 35.2%.