| 摘要 |
THE INVENTION PERTAINS TO A METHOD FOR MAKING A PLOYMER-ADDITIVE COMPOSITE PARTICLE FROM A DOPE BY: i)JET SPINNING THE DOPE TO OBTAIN A PULP, FIBRIL OR FIBRID, WHEREIN THE SOLVENT OF THE DOPE IS SELECTED FROM N-METHYL-2-PYRROLIDONE, N,N?-DIMETHYLFORMAMIDE, N,N?-DIMETHYLACETAMIDE, TETRAMETHYLUREA, AND 4 TO 75 WT% OF A COMPOSITION CONSISTING OF 2 TO 95 WT% OF A PARA-ARAMID POLYMER AND 5-98 WT% OF A SOLID ADDITIVE MATERIAL, TO A TOTAL OF 100 WT%, AND WHEREIN THE ARAMID POLYMER IS DISSLOVED IN THE SOLVENT; OR ii)COAGULATING THE DOPE BY MEANS OF A ROTOR-STATOR APPARATUS IN WHICH THE POLYMER SOLUTION IS APPLIED THROUGH THE STATOR ON THE ROTOR SO THAT THE PRECIPITATING POLYMER-ADDITIVE COMPOSITE PARTICLE IS SUBJECTED TO SHEAR FORCES WHILE THEY ARE IN A PLASTIC DEFORMABLE STAGE. THE ARAMID PREFERABLY IS PPTA AND THE ADDITIVE MATERIAL IS PREFERABLY CHOSEN FROM KAOLIN, TALC, DIATOMACEOUS EARTH, ZEOLITE, GRAPHITE, MINERAL FIBERS, CALCIUM CARBONATE, BARIUM SULFATE, MICA, DYES, PIGMENTS SUCH AS TIO2, METAL PARTICLES. THE DOPE CAN BE USE FOR MAKING PARTICLES SUCH AS FIBRIDS, PULP, AND FIBRILS, FOR USE IN FOR INSTANCE PAPER. THESE PARTICLES HAVE THE ADVANTAGE THAT THE PAPER MAKING PROCESS IS SIMPLIFIED AND OPTIMUM ADHESION BETWEEN ADDITIVE MATERIALS AND POLYMER MATRIX IS ACHIEVED. |
