Polyolefin filament
AssigneeBasell Poliolefine Italia S.r.l.
InventorsRoberta Marchini, Gianni Perdomi, Gianluca Musacchi, Fabio Di Pietro
Life of this patent
Estimating the term…
Abstract
A stretched polyolefin filament, having elongation at break EB of equal to or higher than 80% and a ratio SR/EB, where SR is the stretching ratio, of equal to or lower than 45, made from or containing: a polyolefin composition (I), made from or containing A) from 40% to 78% by weight of a propylene polymer; B) from 22% to 60% by weight of a butene-1 polymer having: 1) a flexural modulus value from 100 to 800 MPa; 2) a ratio MI10/MI2 of from 20 to 40; and 3) a content of fraction soluble in xylene at 0° C. of 15% by weight or lower; wherein the amounts of A) and B) are referred to the total weight of A)+B).
Claims11
A stretched polyolefin filament, having elongation at break EB equal or greater than 80% and a ratio SR/EB, where SR is the stretching ratio, of equal to or lower than 45, comprising:
- a polyolefin composition (I) comprising
- A) from 40% to 78% by weight of a propylene polymer;
- and
- B) from 22% to 60% by weight of a butene-1 polymer having:
- 1) a flexural modulus value from 100 to 800 MPa;
- 2) a ratio MI10/MI2 of from 20 to 40, wherein MI10 is the Melt Flow Index MI at 190° C. with a load of 10 kg and MI2 is the Melt Flow Index MI at 190° C. with a load of 2.16 kg, both measured according to ISO 1133-1:2011;
- and
- 3) a content of fraction soluble in xylene at 0° C. of 15% by weight or lower, referred to the total weight of B);
- wherein the amounts of A) and B) are referred to the total weight of A)+B), the elongation at break is measured on a single filament, 7 days after preparation of the filament, using a dynamometer with clamps distance of 250 mm and applied elongation speed of 250 mm/min., and the flexural modulus is measured according to norm ISO 178:2010, 10 days after molding.
Dependencies are inferred from the claim text.