A system for manufacturing a thermoplastic prepreg includes a double belt mechanism that is configured to compress a fiber mat, web, or mesh that is passed through the double belt mechanism, a resin applicator that is configured to apply monomers or oligomers to the fiber mat, web, or mesh, and a curing oven that is configured to effect polymerization of the monomers or oligomers and thereby form the thermoplastic polymer as the fiber mat, web, or mesh is moved through the curing oven. The double belt mechanism compresses the fiber mat, web, or mesh and the applied monomers or oligomers as the fiber mat, web, or mesh is passed through the curing oven so that the monomers or oligomers fully saturate the fiber mat, web, or mesh. Upon polymerization of the monomers or oligomers, the fiber mat, web, or mesh is fully impregnated with the thermoplastic polymer.

The present invention relates to a process for preparing a polyamide by anionic polymerization and to a polyamide prepared thereby. A polyamide having an ultra-high molecular weight can be easily prepared by the process for preparing a polyamide according to an embodiment of the present invention. In addition, the polyamide having an ultra-high molecular weight according to an embodiment of the present invention has excellent mechanical properties, particularly, impact resistance. Accordingly, the polyamide having an ultra-high molecular weight according to an embodiment of the present invention may be advantageously used as a material for parts selected from the group consisting of materials for automobiles, materials for electronic devices, materials for industrial pipes, materials for architectural and civil engineering, materials for 3D printers, textile materials, cloth materials, materials for machine tools, medical materials, aviation materials, solar materials, battery materials, materials for sports, materials for home appliances, materials for home use, and materials for cosmetics.

The present invention relates to a process for preparing a polyamide by anionic polymerization and to a polyamide prepared thereby. A polyamide having an ultra-high molecular weight can be easily prepared by the process for preparing a polyamide according to an embodiment of the present invention. In addition, the polyamide having an ultra-high molecular weight according to an embodiment of the present invention has excellent mechanical properties, particularly, impact resistance. Accordingly, the polyamide having an ultra-high molecular weight according to an embodiment of the present invention may be advantageously used as a material for parts selected from the group consisting of materials for automobiles, materials for electronic devices, materials for industrial pipes, materials for architectural and civil engineering, materials for 3D printers, textile materials, cloth materials, materials for machine tools, medical materials, aviation materials, solar materials, battery materials, materials for sports, materials for home appliances, materials for home use, and materials for cosmetics.

A system for manufacturing a thermoplastic prepreg includes a double belt mechanism that is configured to compress a fiber mat, web, or mesh that is passed through the double belt mechanism, a resin applicator that is configured to apply monomers or oligomers to the fiber mat, web, or mesh, and a curing oven that is configured to effect polymerization of the monomers or oligomers and thereby form the thermoplastic polymer as the fiber mat, web, or mesh is moved through the curing oven. The double belt mechanism compresses the fiber mat, web, or mesh and the applied monomers or oligomers as the fiber mat, web, or mesh is passed through the curing oven so that the monomers or oligomers fully saturate the fiber mat, web, or mesh. Upon polymerization of the monomers or oligomers, the fiber mat, web, or mesh is fully impregnated with the thermoplastic polymer.

Process for the production of solid particles comprising a material with melting point from −20 to 300° C. at atmospheric pressure, characterized in that a mixture comprising: a1) the material in molten form and a2) the material in solid form is mixed by means of an extruder to give a paste, this is forced through a pelletizing die to give strands, and the strands are comminuted.

Process for the production of solid particles comprising a material with melting point from −20 to 300° C. at atmospheric pressure, characterized in that a mixture comprising: a1) the material in molten form and a2) the material in solid form is mixed by means of an extruder to give a paste, this is forced through a pelletizing die to give strands, and the strands are comminuted.

The present invention relates to novel cast polyamides, to processes for production thereof and to the use thereof.

The present invention relates to novel cast polyamides, to processes for production thereof and to the use thereof.

The present invention relates to a rapid and innovative mechanism for initiating anionic ring-opening polymerization of laurolactam by means of latent initiators on the basis of thermally activatable N-heterocyclic carbene compounds, such as, more particularly, N-heterocyclic carbene-CO.sub.2 compounds and carbene-metal compounds (NHCs). With the new initiation mechanism it is possible accordingly to realize molecular weights (M.sub.w) of from 2000 up to more than 30,000 g/mol, and narrow polydispersities. The polymerizations may be carried out both in bulk and in solution in a suitable solvent. Compounds of this type are thermally latent and on heating initiate a polymerization to polylaurolactam in high yields, up to a quantitative conversion, whereas at room temperature there is no reaction. Polydispersity and molecular weight of the polylaurolactam can be adjusted through the choice of the initiator and of the reaction conditions.

Formulation systems usable for fabricating a three-dimensional object made of a polyamide-containing material, by three-dimensional 3D inkjet printing, and methods and systems utilizing same, are provided. The formulation systems are formed of at least a first and second model formulations containing a lactam and a catalyst for inducing anionic ring opening polymerization of the lactam in the first formulation, and an activator for promoting anionic ring opening polymerization of the lactam in the second formulation, and are further characterized as: including in the first and/or second formulation a compound capable of increasing a rate of said polymerization upon exposure to said curing energy; including as an activator a lactam-blocked polyisocyanate; and/or as including in the first model formulation at least one material capable of reducing a melting point of said first model formulation. Formulation systems usable at a selected ratio are also provided.