VERY SOFT POLYOLEFIN SPUNBONDED NONWOVEN FABRIC AND ITS PRODUCTION METHOD

摘要

Disclosed are a very soft polyolefin spunbonded nonwoven fabric and its production method. The polyolefin spunbonded nonwoven fabric according to the present invention is defined as (A) being formed of continuous polyolefin fibers having a fineness of 0.5 to 3 denier, (B) having basic weight between 30 g/m<2> and 15 g/m<2>, and (C) having $of\; 2.5\; g\; or\; below,\; wherein\; SMD\; and\; STD\; are\; respectively\; the\; softnesses\; in\; the\; machine\; and\; transverse\; directions\; as\; measured\; by\; a\; handle-O-meter.\; The\; method\; of\; producing\; a\; strip\; of\; very\; soft\; polyolefin\; nonwoven\; fabric\; by\; directing\; polyolefin\; continuous\; fibers\; (2)\; in\; a\; fixed\; direction,\; are\; characterized\; by\; comprising\; the\; steps\; of:\; orienting\; the\; axes\; of\; the\; continuous\; fibers\; in\; the\; direction\; in\; which\; the\; continuous\; fibers\; are\; fed\; so\; as\; to\; form\; a\; web\; (5)\; having\; a\; warp\; orientation\; factor\; (the\; maximum\; tensile\; strength\; in\; the\; direction\; in\; which\; the\; continuous\; fibers\; are\; fed,\; i.e.,\; in\; a\; machine\; direction/the\; maximum\; tensile\; strength\; in\; a\; transverse\; direction)\; of\; 3.0\; or\; above;\; and\; then\; applying\; wave-like\; crepes\; propagated\; in\; the\; machine\; direction\; to\; the\; web\; by\; creping\; web.$