A system for manufacturing a thermoplastic prepreg, the system comprising: (i) a double belt mechanism that includes an upper belt and a lower belt, the upper belt being positioned atop the lower belt so as to compress a fiber mesh that is passed through the double belt mechanism and the lower belt having a longitudinal length that is substantially longer than the upper belt; (ii) a drying mechanism that is positioned atop the lower belt and that is configured to remove residual moisture from the fiber mesh as the fiber mesh is moved past the drying mechanism; (iii) a resin application die that is positioned atop the lower belt and that is configured to apply monomers or oligomers to the fiber mesh as the fiber mesh is moved past the resin application die, wherein the monomers or oligomers are polymerizable to form a thermoplastic polymer; and (iv) a curing oven that is configured to effect polymerization of the monomers or oligomers and thereby form the thermoplastic polymer as the coated fiber mesh is moved through the curing oven; wherein: (v) the fiber mesh includes chopped fibers; (vi) the system comprising a fiber chopper positioned above the lower belt, the fiber chopper being configured to cut fiber strands or rovings to form the chopped fibers, the fiber chopper being positioned so that as the fibers strands or rovings are cut, the chopped fibers fall atop the lower belt and form the fiber mesh, (vii) the fiber chopper is a first fiber chopper and the chopped fibers are first chopped fibers, and the system further comprises a second fiber chopper positioned above the lower belt, the second fiber chopper being configured to cut second fiber strands or rovings to form second chopped fibers, the second fiber chopper being positioned so that as the second fibers strands or rovings are cut, the second chopped fibers fall atop the first chopped fibers and form a layered or hybrid fiber mesh,and (viii) the double belt mechanism compresses the fiber mesh and the applied monomers or oligomers as the fiber mesh is passed through the curing oven such that the monomers or oligomers fully saturate the fiber mesh and the fiber mesh is fully impregnated with the thermoplastic polymer upon polymerization of the monomers or oligomers. (i) a double belt mechanism that includes an upper belt and a lower belt, the upper belt being positioned atop the lower belt so as to compress a fiber mesh that is passed through the double belt mechanism and the lower belt having a longitudinal length that is substantially longer than the upper belt; (ii) a drying mechanism that is positioned atop the lower belt and that is configured to remove residual moisture from the fiber mesh as the fiber mesh is moved past the drying mechanism; (iii) a resin application die that is positioned atop the lower belt and that is configured to apply monomers or oligomers to the fiber mesh as the fiber mesh is moved past the resin application die, wherein the monomers or oligomers are polymerizable to form a thermoplastic polymer; and (iv) a curing oven that is configured to effect polymerization of the monomers or oligomers and thereby form the thermoplastic polymer as the coated fiber mesh is moved through the curing oven; (v) the fiber mesh includes chopped fibers; (vi) the system comprising a fiber chopper positioned above the lower belt, the fiber chopper being configured to cut fiber strands or rovings to form the chopped fibers, the fiber chopper being positioned so that as the fibers strands or rovings are cut, the chopped fibers fall atop the lower belt and form the fiber mesh, (vii) the fiber chopper is a first fiber chopper and the chopped fibers are first chopped fibers, and the system further comprises a second fiber chopper positioned above the lower belt, the second fiber chopper being configured to cut second fiber strands or rovings to form second chopped fibers, the second fiber chopper being positioned so that as the second fibers strands or rovings are cut, the second chopped fibers fall atop the first chopped fibers and form a layered or hybrid fiber mesh,and (viii) the double belt mechanism compresses the fiber mesh and the applied monomers or oligomers as the fiber mesh is passed through the curing oven such that the monomers or oligomers fully saturate the fiber mesh and the fiber mesh is fully impregnated with the thermoplastic polymer upon polymerization of the monomers or oligomers.