Elastomeric nonwoven laminates and process for producing same
An elastomeric nonwoven laminate and a process for producing the elastomeric nonwoven laminate are provided. The elastomeric nonwoven laminate includes a first nonwoven, a second nonwoven and a plurality of elastic strands. The plurality of elastic strands is attached to the first nonwoven while under a strain producing a corrugated intermediate laminate once the strain is relieved. A second nonwoven is joined to the corrugated intermediate laminate and subsequently mechanically activated forming an elastomeric nonwoven laminate.
1. An elastomeric nonwoven laminate comprising:
a) a first nonwoven including a first bonding surface and a first machine direction;
b) a plurality of elastic strands extending in the first machine direction and attached to the first bonding surface of the first nonwoven forming an intermediate laminate, wherein the plurality of elastic strands are under a first strain along the length of the elastic strands when attached to the first bonding surface forming corrugations in the first nonwoven once the first strain is relieved enabling the intermediate laminate to be extendable in the first machine direction; and
c) a second nonwoven having a second bonding surface, a second machine direction and a second cross direction, wherein the second bonding surface is attached to the elastic strands and a portion of the first bonding surface of the first nonwoven once the first strain is relieved from the elastic strands forming a nonwoven laminate, and wherein the second nonwoven is mechanically activated subsequent to being attached to the elastic strands and a portion of the first bonding surface enabling the second nonwoven to be extensible with the intermediate laminate.
2. The elastomeric nonwoven laminate of claim 1 wherein the elastomeric nonwoven laminate has an extensibility of at least about 50% in the first machine direction prior to reaching a force wall.
3. The elastomeric nonwoven laminate of claim 1 wherein the elastic strands, the first bonding surface of the first nonwoven, and second bonding surface of the second nonwoven are attached via adhesive, ultrasonic bonding, thermal bonding, pressure bonding, or a combination thereof.
4. The elastomeric nonwoven laminate of claim 1 wherein the first strain along the strand elastic length on the plurality of elastic strands ranges from about 20 percent to about 500 percent.
5. The elastomeric nonwoven laminate of claim 1 wherein the basis weight is less than 150 gsm and the extensibility is at least about 100% in the first machine direction prior to reaching a force wall.
6. The elastomeric nonwoven laminate of claim 1 wherein the second machine direction of the second nonwoven is about perpendicular to the first machine direction of the first nonwoven and wherein the second nonwoven is mechanically activated in the second cross direction enabling the second nonwoven to be extensible in the second cross direction.