An ethylene/alpha-olefin interpolymer suitable for use in fibers and nonwovens having a density of from 0.911 to 0.939 g/cc, a Brookfield viscosity of less than or equal to 50,000 cP, and a molecular weight distribution (M.sub.w,cc/M.sub.n,cc) of 1.8 to 3.5, and articles thereof.

A polymer composition for forming spunbond fabrics offers a unique combination of simplicity and processability, while allowing fabrics formed therefrom to exhibit suitable elasticity and/or tensile strength. The polymer composition includes an propylene-based elastomer component exhibiting a particular combination of MFR and comonomer content, so as to allow for improved processability with minimal, if any, need for blending partners in the polymer composition, while still permitting fabrics formed therefrom to exhibit improved elasticity and/or tensile strength.

The present disclosure provides a fiber and fabrics made therefrom. In an embodiment, a fiber is provided and includes an odor control composition. The odor control composition includes (A) from 85 wt % to 99.5 wt % of an olefin-based polymer and (B) from 15 wt % to 0.5 wt % of an odor suppressant. The odor suppressant includes: (i) an ionomer, (ii) particles of zinc oxide, and (iii) particles of copper oxide.

In accordance with at least selected embodiments, the present invention is directed to novel, improved, or modified porous membranes, fibers, porous fibers, products made from such membranes, fibers or porous fibers, and/or related methods of production, use, and/or the like. In accordance with at least certain embodiments, the present invention is directed to novel, improved, or modified microporous membranes or films, fibers, microporous fibers, materials or layers made from such membranes, fibers or porous fibers, and the like for use in textile materials, garments, products, and/or textile related applications. Microporous membranes, fibers, and/or microporous fibers are made of one or more copolymers, such as block or impact copolymers, or of at least one polyolefin combined with at least one copolymer as a means of improving the hand, drape, and/or surface coefficient of friction performance properties for use in textile garments, textile materials or textile related applications.

In accordance with at least selected embodiments, the present invention is directed to novel, improved, or modified porous membranes, fibers, porous fibers, products made from such membranes, fibers or porous fibers, and/or related methods of production, use, and/or the like. In accordance with at least certain embodiments, the present invention is directed to novel, improved, or modified microporous membranes or films, fibers, microporous fibers, materials or layers made from such membranes, fibers or porous fibers, and the like for use in textile materials, garments, products, and/or textile related applications. Microporous membranes, fibers, and/or microporous fibers are made of one or more copolymers, such as block or impact copolymers, or of at least one polyolefin combined with at least one copolymer as a means of improving the hand, drape, and/or surface coefficient of friction performance properties for use in textile garments, textile materials or textile related applications.

A supramolecular polymer with living characteristics is provided based on small molecules or metal complexes of a planar or linear geometry and a polymer. The small molecules are solvophobic and can associate or assemble with each other through non-covalent interactions such as but not limited to metal-metal, π-π, hydrogen-bonding, and/or solvophobic-solvophobic interactions, in the modulation of the polymer. The polymer has affinity to the medium (e.g., solvent) and still interacts with the small molecules via non-covalent interactions such as electrostatic attractions to stabilize the associated/assembled small molecules. Varying the composition and/or length of the polymer can modulate the dimensions of the supramolecular polymer and the nanostructures therefrom. The two- or multi-component supramolecular polymer has active ends to support further supramolecular polymerization upon addition of small molecules of a planar or linear geometry. A process of two-component living supramolecular polymerization is also provided.

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.sup.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.sup.13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranging from 11.0 mol % to 14.2 mol %.

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.sup.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.sup.13 NMR sequences PEP measured on the fraction soluble in xylene at 25° C. ranging from 11.0 mol % to 14.2 mol %.

A method comprises providing a resin comprising an olefin block copolymer; spinning the resin into one or more fibers; cooling the one or more fibers to below the solidification point of the resin; after cooling, stretching the one or more fibers to a nominal elongation of 50 to 900% to form one or more stretched fibers; and relaxing the one or more stretch fibers to form one or more elastic fibers, and, optionally laminating the fibers to a flexible substrate. Articles comprising such elastic fiber(s) bonded to a nonwoven, can exhibit: a force at 50% elongation of less than 2 Newtons, a force at 100% elongation of less than 4 Newtons, a elongation at five Newtons for a 50 mm sample of at least 120%, and/or an unload force at 50% on a second cycle of less than 1.5 N/50 mm.

A method comprises providing a resin comprising an olefin block copolymer; spinning the resin into one or more fibers; cooling the one or more fibers to below the solidification point of the resin; after cooling, stretching the one or more fibers to a nominal elongation of 50 to 900% to form one or more stretched fibers; and relaxing the one or more stretch fibers to form one or more elastic fibers, and, optionally laminating the fibers to a flexible substrate. Articles comprising such elastic fiber(s) bonded to a nonwoven, can exhibit: a force at 50% elongation of less than 2 Newtons, a force at 100% elongation of less than 4 Newtons, a elongation at five Newtons for a 50 mm sample of at least 120%, and/or an unload force at 50% on a second cycle of less than 1.5 N/50 mm.