High performance elastomeric nonwoven fibrous webs

Details High performance elastomeric nonwoven fibrous webs High performance elastomeric nonwoven fibrous webs

1993-06-09

1994-07-26

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428198, 428224, 428283, 428284, 428286, 428287, 428288, 428296, 428297, 428298, 428326, 428903, B32B 2714

Patent

active

053326130

ABSTRACT:
Disclosed is an elastic nonwoven web containing a coherent matrix of fibers formed from an extrudable blend composed of 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. The elastic nonwoven web 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. The elastic nonwoven web may also include at least one type of nonelastic fibers and/or particulate materials distributed within or on the matrix of elastomeric fibers. The elastic nonwoven web may be incorporated into a multilayer material and/or may be a component of a composite elastic material in which the elastic web is joined to a gatherable layer at spaced apart locations so that the gatherable layer is gathered between the spaced-apart locations.

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