Elastic film laminate
AssigneeMinnesota Mining and Manufacturing Company
InventorsDouglas A. Swenson, Herbert J. Fox, Dennis L. Krueger, Rochelle L. Lockridge
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Abstract
An elastic film is provided with non-elastic regions and elastic regions formed from a multi-layer film of an elastomeric layer and a relatively inelastic layer (s).
Claims25
An elastic film laminate comprising a continuous elastomeric core layer of at least a first thickness in a relaxed elastic state and at least one continuous inelastic skin outer layer of oriented plastic having a second thickness less than the first thickness, the film laminate having at least one elastic region and at least one adjacent non-elastic region each of said at least one elastic region and said at least one adjacent non-elastic region comprised of both a region of said elastomeric core layer and a region said at least one inelastic skin outer layer, the elastomeric core layer region in said at least one non-elastic region having a thickness less than said first thickness, when the elastomeric core layer is in the relaxed state and where said elastomeric core layer is in substantially continuous planar contact with said at least one outer skin layer, said elastomeric core layer in said at least one elastic region being of said first thickness and said overlying inelastic skin layer in said at lease one elastic region having an outer surface area greater than the planar surface area of said elastomeric core layer in said at least one elastic region when said elastomeric core layer is in the relaxed state.
An anisotropic film laminate comprising a continuous elastomeric core layer and at least one continuous inelastic skin layer of uniaxially oriented plastic, the film laminate being substantially inelastic in the direction of orientation of said at least one skin layer said skin layer being unoriented in a direction transverse to said direction of orientation such that the laminate is extensible in said transverse direction.
Dependencies are inferred from the claim text.