Breathable elastic film/nonwoven laminate
AssigneeKimberly-Clark Worldwide, Inc.
InventorsMichael Tod Morman, Linda Jeanette Morgan, Bernard Cohen
Life of this patent
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Abstract
A breathable elastic laminate is formed by bonding a film including an elastic water vapor-soluble polymer to a neckable nonwoven web such that when the film is relaxed, the web is in a necked state. The breathable laminate is stretchable in a direction parallel to the narrowing or necking of the web. The laminate possesses excellent water vapor permeability but acts as a barrier to the passage of odor-causing chemicals including ammonia.
Claims45
A breathable elastic laminate, comprising
- a breathable elastic film;
- and
- a neckable nonwoven web bonded to the film while the nonwoven web is necked and the film is in an unstretched state;
- the laminate having an MVTR of at least about 300 grams/m.sup.2 -24 hrs.
A breathable elastic laminate, comprising:
- a water vapor-permeable elastic film comprising a polymer selected from the group consisting of silicone polymers, polyurethanes, polyether esters, polyether amides and combinations thereof;
- and
- a neckable spunbond web bonded to the film so that the spunbond web is necked when the film is unstretched;
- the laminate having an MVTR of at least about 1200 grams/m.sup.2 -24 hrs.
A breathable elastic laminate, comprising:
- a breathable elastic film having first and second sides;
- a meltblown nonwoven layer bonded to the first side of the film;
- and
- a spunbond nonwoven layer bonded to the second side of the film so that the spunbond web is necked when the film is unstretched.
A breathable elastic laminate, comprising:
- a breathable elastic film;
- and
- a neckable nonwoven laminate bonded to the film so that the nonwoven laminate is necked when the film is unstretched;
- the laminate having an MVTR of at least about 300 grams/m.sup.2 -24 hours.
A breathable elastic laminate, comprising:
- a breathable elastic film;
- and
- a neckable nonwoven web bonded to the film;
- the nonwoven web being necked in a first direction when the film is in an unstretched state;
- the film and web being bonded together while the film is stretched in a second direction nonparallel to the first direction.
Dependencies are inferred from the claim text.