Nonwoven web material containing crosslinked elastic component formed from a pentablock copolymer
AssigneeKimberly-Clark Worldwide, Inc.
InventorOomman P. Thomas
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Abstract
A nonwoven web material that includes an elastic component or material (e.g., nonwoven web, nonwoven web laminated to an elastic material, etc.) is provided. The elastic component contains a crosslinked network formed from a pentablock copolymer containing at least two monoalkenyl aromatic midblocks positioned between conjugated diene endblocks, such as butadiene-styrene-butadiene-styrene-butadiene (“BSBSB”) or isoprene-styrene-isoprene-styrene-isoprene (“ISISI”). Prior to crosslinking, the pentablock copolymers have a relatively low viscosity and thus may be readily formed into a precursor elastic material (e.g., film, strands, web, etc.) that is subsequently crosslinked to achieve the desired elastic and mechanical properties.
Claims22
A nonwoven web material comprising an elastic component that includes a crosslinked elastomeric network, the crosslinked network containing a pentablock copolymer having at least two monoalkenyl aromatic midblocks positioned between conjugated diene endblocks.
A method for forming a nonwoven composite, the method comprising:
- melt extruding the pentablock copolymer having at least two monoalkenyl aromatic midblocks positioned between conjugated diene endblocks;
- forming a precursor elastic material from the melt extruded pentablock copolymer;
- laminating the precursor elastic material to a nonwoven web facing;
- and
- crosslinking the pentablock copolymer to form a crosslinked elastomeric network.
Dependencies are inferred from the claim text.