Abstract: Temperature resistant multilayer composites, methods for making same, and articles made therefrom. The method can include extruding one or more polyolefin polymers having a MFR from less than 90 dg/min through at least one die having a plurality of nozzles to form a plurality of continuous fibers, at least one die operating at a melt pressure from greater than 500 psi (3447 kPa) to form at least one elastic meltblown layer; adhering the at least one elastic meltblown layer to at least one extensible layer to form a multilayer composite; and at least partially crosslinking the elastic meltblown layer or the extensible layer or both.

Abstract: Provided are multi-beam meltblowing apparatuses having a ridged collecting surface, methods for making multilayer meltblown composites using such apparatuses, and multilayer meltblown composites made therefrom. Also provided are a multilayer composite comprising an elastic layer and at least one ridged layer and a method for making the multilayer composite.

Abstract: Temperature resistant multilayer composites, methods for making same, and articles made therefrom. The method can include extruding one or more polyolefin polymers having a MFR from less than 90 dg/min through at least one die having a plurality of nozzles to form a plurality of continuous fibers, at least one die operating at a melt pressure from greater than 500 psi (3447 kPa) to form at least one elastic meltblown layer; adhering the at least one elastic meltblown layer to at least one extensible layer to form a multilayer composite; and at least partially crosslinking the elastic meltblown layer or the extensible layer or both.

Abstract: Multilayer meltblown composites, articles made therefrom, and methods for making same. The meltblown composite can include a first meltblown layer comprising one or more resins having an Ultimate Elongation (UE) of from about 50% to about 250%, as measured according to ASTM D412; and a second meltblown layer comprising a propylene-?-olefin copolymer having an ethylene content of about 5 wt % to about 20 wt %; a MFR (ASTM-1238D, 2.16 kg, 230° C.) of about 10 g/10 min to about 30 g/10 min; and a heat of fusion of 75 J/g or less.

Abstract: A blended polypropylene composition, fiber, and nonwoven articles made therefrom are provided. In one aspect, the blended polypropylene composition comprises a first polymer component having a molecular weight distribution of from 2.5 to 8, and a second polymer component having a molecular weight distribution of from 1.8 to 3. The first polymer component has a melt flow rate of greater than 30 g/10 min. and the second polymer component has a melt flow rate of less than 40 g/10 min., and the blended polypropylene composition has a melt flow rate of greater than 5 g/10 min.

Abstract: The present invention is a meltblown fiber and a fabric manufactured from the fiber comprising reactor grade polypropylene having a melt flow rate of from 100 to 5000 and having less than 50 stereo defects per 1000 units. Further, the polypropylene is typically produced from a metallocene catalyzed process, the metallocene being at least one bridged 2,4 di-substituted indenyl metallocene in one embodiment, and a bridged 4-phenyl indenyl metallocene in another embodiment. The metallocene is part of a system that can include a fluorided support and a non-coordinating anion activator.

Abstract: The present invention is a meltblown fiber and a fabric manufactured from the fiber comprising reactor grade polypropylene having a melt flow rate of from 100 to 5000 and having less than 50 stereo defects per 1000 units. Further, the polypropylene is typically produced from a metallocene catalyzed process, the metallocene being at least one bridged 2,4 di-substituted indenyl metallocene in one embodiment, and a bridged 4-phenyl indenyl metallocene in another embodiment. The metallocene is part of a system that can include a fluorided support and a non-coordinating anion activator.

Abstract: The co-polymerization reaction of one or more olefin monomers, such as propylene, with &agr;,&ohgr;-diene units and the resulting copolymers are provided. More specifically, the copolymer may have from 90 to 99.999 weight percent of olefins and from 0.001 to 2.000 weight percent of &agr;,&ohgr;-dienes. The copolymer may have a weight average molecular weight in the range from 50,000 to 2,000,000, a crystallization temperature in the range from 115° C. to 135° C. and a melt flow rate in the range from 0.1 dg/min to 100 dg/min. These copolymers may be employed in a wide variety of applications, the articles of which include, for example, films, fibers, such as spunbonded and meltblown fibers, fabrics, such as nonwoven fabrics, and molded articles. The copolymer may further include at least two crystalline populations.

Abstract: The co-polymerization reaction of one or more olefin monomers, such as propylene, with &agr;,&ohgr;-diene units and the resulting copolymers are provided. More specifically, the copolymer may have from 90 to 99.999 weight percent of olefins and from 0.001 to 2.000 weight percent of &agr;,&ohgr;)-dienes. The copolymer may have a weight average molecular weight in the range from 50,000 to 2,000,000, a crystallization temperature in the range from 115° C. to 135° C. and a melt flow rate in the range from 0.1 dg/min to 100 dg/min. These copolymers may be employed in a wide variety of applications, the articles of which include, for example, films, fibers, such as spunbonded and meltblown fibers, fabrics, such as nonwoven fabrics, and molded articles. The copolymer may further include at least two crystalline populations.