PREFORMS COMPRISING COMMINGLED LONG-FIBER WEB LAYER, PREPARATION METHOD OF PREFORMS AND THERMOPLASTIC COMPOSITE MATERIAL COMPRISING PREFORMS AND PREPARATION METHOD THEREOF

摘要

The present invention relates to a long-fiber non-woven fabric preform including commingled long-fiber web layers oriented discontinuously and in a random direction and a method for preparing the same and, more particularly, to a preform including: a first base material layer; a commingled long-fiber web layer formed by long-fibers based on a mixed fiber being oriented discontinuously and in a random direction on the first base material layer; and a second base material layer stacked on the commingled long-fiber web layer. The long-fiber non-woven fabric preform according to the present invention has the commingled long-fiber web layer oriented discontinuously and in the random direction, and thus its isotropy and property can be improved. As a composite material including the long-fiber non-woven fabric preform to this effect is prepared, the lightweight composite material can be provided with various improved properties such as high strength, high rigidity, and high impact resistance.