CONJUGATE POLYOLEFIN FILAMENT NONWOVEN FABRIC AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain a core-sheath conjugated filament nonwoven fabric spinnable without causing yarn breakage and having excellent spinnability, strength, softness and texture and provide its production process. SOLUTION: This invention relates to a core-sheath conjugate filament nonwoven fabric and its production process. The core component is a polypropylene having a Q value (defined by the weight-average molecular weight divided by the number-average molecular weight) of 1.5-2.7 and a melt-flow rate of 10-100 g/10 min at 210 deg.C under 2.16 kg load and produced by the polymerization with a high-activity metallocene catalyst and the sheath component is a high-density polyethylene having a Q value of 2.5-4.5 and a melt-flow rate of 10-70 g/10 min at 190 deg.C under 2.16 kg load or a mixture of 20-80 wt.% of the high-density polyethylene and 80-20 wt.% of a linear low-density polyethylene wherein the difference between the melt-flow rate values of the core and the sheath components is 0-35 g/10 min. Both components are subjected to melt- extrusion spinning at the same temperature within the range of 230-270 deg.C.