High performance elastomeric nonwoven fibrous webs

A coformed elastic nonwoven web comprising:

• a coherent matrix of elastic fibers formed from a blend including:
• an elastomeric A-B-A-B tetrablock copolymer where A is a thermoplastic polymer block and where B is an isoprene monomer unit hydrogenated to substantially a poly(ethylene-propylene) monomer unit;
• a tackifying resin, and
• at least one other material selected from the group consisting of nonelastic fibers and particulates;
• and wherein said web has an elastic modulus of less than about 1.25 which is locally constant during elongation of the web up to about 250 percent.

A composite elastic material comprising:

• at least one elastic sheet formed from a blend comprising:
• an elastomeric A-B-A-B tetrablock copolymer where A is a thermoplastic polymer block and where B is an isoprene monomer unit hydrogenated to substantially a poly(ethylene-propylene) monomer unit;
• and
• a tackifying resin;
• wherein the elastic sheet is adapted to have an elastic modulus of less than about 1.25 which is locally constant during elongation of the web up to about 250 percent;
• and
• at least one gatherable layer joined at spaced apart locations to the elastic sheet, and
• wherein the gatherable layer is gathered between the spaced-apart locations.