Polymeric strands including a propylene polymer composition and nonwoven fabric and articles made therewith
AssigneeKimberly-Clark Corporation
InventorsDavid C. Strack, Tracy N. Wilson, Donald V. Willitts
Life of this patent
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Abstract
Single and multicomponent polymeric strands including a blend of a melt-extrudable polyolefin and a heterophasic polypropylene composition. The heterophasic polypropylene composition includes three polymers and is normally not melt-spinable into strands by itself. In the multicomponent strands, the blend is in one side or the sheath. Fabric made with such strands is also disclosed and has improved combinations of strength, abrasion resistance, and softness properties. Composite materials including the foregoing fabric bonded to both sides of an inner meltblown layer are also disclosed. In addition, garments made with the fabric are disclosed.
Claims16
A nonwoven fabric comprising polymeric strands, said polymeric strands comprising a first polymeric component which comprises a blend of:
- (a) a melt-extrudable polyolefin, and
- (b) a polypropylene composition comprising:
- (i) a first polymer which is a propylene polymer comprising greater than 85% by weight of propylene and having an isotactic index greater than 85;
- (ii) a second polymer which is a polymer comprising ethylene and being insoluble in xylene at about 23.degree. C.;
- and
- (iii) a third polymer which is an amorphous copolymer of ethylene and propylene, the amorphous copolymer being soluble in xylene at about 23.degree. C.
Dependencies are inferred from the claim text.