Improved thermoplastic polymer soft elastic fiber blend compositions including a crystalline isotactic polypropylene component and a crystallizable alpha-olefin and propylene copolymer component, the copolymer comprising crystallizable alpha-olefin sequences. In a preferred embodiment, improved thermoplastic polymer blends are provided prepared from 0% to 95%, preferably 2% to 40% of the crystalline isotactic polypropylene and from 5% to 100%, preferably 60% to 98% of a crystallizable ethylene and propylene copolymer, wherein said copolymer comprises isotactically crystallizable propylene sequences and is predominately propylene. The resultant blends manifest unexpected compatibility characteristics, increased tensile strength, and, improved resistance to elastic deformation.

Composições elásticas macias melhoradas da mistura da fibra do polímero thermoplastic including um componente isotactic cristalino do polypropylene e um componente crystallizable do copolymer do alceno alfa e do propylene, o copolymer que compreende seqüências crystallizable do alceno alfa. Em uma incorporação preferida, as misturas thermoplastic melhoradas do polímero são fornecidas prepararam 0% a 95%, preferivelmente 2% a 40% do polypropylene isotactic cristalino e 5% a 100%, preferivelmente 60% a 98% de um copolymer crystallizable do etileno e do propylene, wherein o copolymer dito compreende seqüências isotactically crystallizable do propylene e é predominately propylene. As misturas resultantes manifestam características inesperadas da compatibilidade, força tensile aumentada, e, resistência melhorada à deformação elástica.

 
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