| 摘要 |
<p>The invention concerns a method for making propylene monofilaments having a 230 °C/2.16 kg melt flow index (MFI) from 2 to 16 g/10 min, having a diameter larger than 0.050 mm and improved abrasion resistance, which consists in adding to the polypropylene 20 to 0.1 wt. % of an additive upstream of the extruder, spinning the molten material in a water bath, drawing it and winding it. The invention also concerns a polypropylene monofilament having a 230 °C/2.6 kg melt flow index (MFI) from 2 to 16 g/10 min, having a diameter greater than 0.050 mm and improved abrasion resistance, exhibiting a strength of at least 50 cN/tex, for an elongation corresponding to the maximum tensile stress (elongation at rupture) of at least 30 %. Furthermore, it has an abrasion of less than 0.05 % and a relative tensile energy absorption > 100 % after being treated for 24 hours at 120 °C.</p> |
