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OwnerMary Lucille DeLucia, Robert Leslie Hudson +2inventors
InventorsMary Lucille DeLucia, Robert Leslie Hudson, Samuel Edward Marmon, Simon Kwame Ofosu
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An extrudable composition is provided which is made from at least two thermoplastic polymers in a biconstituent construction. One of the thermoplastic polymers is present as a dominant continuous phase and the other one or more polymers are present as a non-continuous phase or phases in an amount of 1.5 weight percent or less. No compatibilizer is necessary. The polymer of the non-continuous phase or phases has a polymer melt temperature higher than 30° C. below the polymer melt temperature of the continuous phase. The polymer of the dominant phase may be, for example, polypropylene and the non-continuous phase may be, for example, polyamide. The extrudable composition may be used to produce fibers which are generally between about 5 and 50 microns in diameter. The fibers may be made into nonwoven fabrics.
A nonwoven fabric which is made from fibers extruded from a composition free of a compatibilizer and comprising at least two thermoplastic polymers, wherein one of said thermoplastic polymers is a polyolefin as a dominant continuous phase present in an amount between 98.5 to 99.9 weight percent, and the other one or more polymers are polyamides as a non-continuous phase or phases present in an amount between 0.1 to 1.5 weight percent, and wherein the polymer of said non-continuous phase or phases has a polymer melt temperature higher than 30° C. below the polymer melt temperature of said continuous phase.
Dependencies are inferred from the claim text.