Fiber comprising propylene ethylene random copolymer
A fiber of a propylene ethylene copolymer having: i) xylene soluble fraction at 25° C. ranging from 14 wt % to 27 wt %; ii) intrinsic viscosity of the fraction soluble in xylene at 25° C. ranging from 1.0 to 2.4 dl/g; iii) melt flow rate, MFR, ranging from 12 g/10 min to 60 g/10 min; iv) an ethylene derived units content ranging from 5.0 wt % to 12.0 wt %; v) the ethylene derived units content of the fraction insoluble in xylene at 25° C. ranging from 2.5 wt % to 6.0 wt %; vi) the ethylene derived units content of the fraction soluble in xylene at 25° C. ranging from 15.2. wt % to 30.2 wt % vii) C 13 NMR sequences PEP measured on the fraction insoluble in xylene at 25° C. ranging from 3.5 mol % to 5.5 mol %; and viii) the C 13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranging from 11.0 mol % to 14.2 mol %.
1. A fiber comprising:
a propylene ethylene copolymer having:
i) a xylene soluble fraction at 25° C. ranging from 14 wt % to 27 wt %, based upon the total weight of the propylene ethylene copolymer;
ii) an intrinsic viscosity of the fraction soluble in xylene at 25° C. ranging from 1.0 to 2.4 dl/g;
iii) a melt flow rate, MFR, measured according to ISO 1133 at 230 ° C. with a load of 2.16 kg, ranging from 12 g/10 min to 60.0 g/10 min;
iv) an ethylene derived units content ranging from 5.0 wt % to 12.0 wt %, based upon the total weight of the propylene ethylene copolymer;
v) the ethylene derived units content of the fraction insoluble in xylene at 25° C. ranging from 2.5 wt % to 6.0 wt %;
vi) the ethylene derived units content on the fraction soluble in xylene at 25° C. ranging from 15.2 wt % to 30.2 wt %;
vii) C 13 NMR sequences PEP measured on the fraction insoluble in xylene at 25° C. ranging from 3.5 mol % to 5.5 mol %; and
viii) C 13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranging from 11.0 mol % to 14.2 mol %.
2. The fiber according claim 1 , wherein, in the propylene ethylene copolymer, the melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, ranges from 15.0 g/10 min to 50.0 g/10 min.
3. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the xylene soluble fraction at 25° C. ranges from 17 wt % to 25 wt %.
4. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the intrinsic viscosity of the fraction soluble in xylene at 25° C. ranges from 1.5 to 2.2 dl/g.
5. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the melt flow rate, MFR, measured according to ISO 1133 at 230° C. with a load of 2.16 kg, ranges from 18.6 g/10 min to 30.0 g/10 min.
6. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the C 13 NMR sequences PEP measured on the fraction insoluble in xylene at 25° C. ranges from 3.8 mol % to 5.2 mol %; and the C 13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranges from 11.5 mol % to 13.8 mol %.
7. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the C 13 NMR sequences PEP measured on the fraction insoluble in xylene at 25° C. ranges from 3.9 mol % to 4.8 mol %; and the C 13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranges from 12.3 mol % to 13.5 mol %.
8. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the ethylene derived units content of the fraction insoluble in xylene at 25° C. ranges from 3.2 wt % to 5.2 wt %.
9. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the ethylene derived units content of the fraction soluble in xylene at 25° C. ranges from 17.2 wt % to 24.8 wt %.
10. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the C 13 NMR sequences PEE measured on the fraction soluble in xylene at 25° C. range from 7.2 mol % to 12.0 mol %.
11. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the C 13 NMR sequences EEE measured on the fraction soluble in xylene at 25° C. are lower than 6.5 mol %.
12. The fiber according to claim 1 , wherein, in the propylene ethylene copolymer, the product of reactivity ratio r1r2 of the fraction insoluble in xylene at 25° C. measured with C 13 NMR is between 2.4 and 4.6.
13. The fiber according to claim 1 comprising a skin-core structure wherein the skin, the core, or both of the fiber comprise the propylene ethylene copolymer.
14. The fiber according to claim 13 , wherein both the skin and core of the fiber comprise the propylene ethylene copolymer .
15. Non-woven fabrics comprising a fiber according to claim 1 .