Breathable elastic polymeric film laminates
AssigneeTredegar Film Products Corporation
InventorJames E. Pelkie
Life of this patent
Estimating the term…
Abstract
An elastomeric breathable three-dimensional composite material and the process for producing the same are disclosed. A carrier material is supplied onto a top surface of continuous portions of an elastomeric film to form the composite material. A pressure differential is applied to a bottom surface of film for a period of time sufficient for three-dimensional apertured structures to be formed in the film.
Claims12
A composite material comprising an elastomeric three-dimensional, apertured film having a first surface and a three-dimensional surface with a plurality of protuberances, wherein each protuberance defines an aperture at a terminal end of said protuberance, and a film carrier material bonded to at least one of the first surface and the three-dimensional surface of the elastomeric film, said composite material comprising a continuous supply of the film carrier material coextruded with the elastomeric film material thereby forming a laminate which is apertured in a secondary process, said composite material having elastic hysteresis properties such that the composite material has less than 10% tensile set after elongation of about 300%.
A composite material comprising an elastomeric three-dimensional, apertured film having a first surface and a three-dimensional surface with a plurality of protuberances, wherein each protuberance defines an aperture at a terminal end of said protuberance, and a film carrier material bonded to at least one of the first surface and the three-dimensional surface of the elastomeric film, said composite material comprising a continuous supply of the film carrier material coextruded with the elastomeric film material thereby forming a laminate which is apertured in a secondary process, said composite material having elastic hysteresis properties such that the composite material has less than 21% force relaxation after elongation of about 300%.
A composite material comprising an elastomeric three-dimensional, apertured film having a first surface and a three-dimensional surface with a plurality of protuberances, wherein each protuberance defines an aperture at a terminal end of said protuberance, and a film carrier material bonded to at least one of the first surface and the three-dimensional surface of the elastomeric film, said composite material comprising a continuous supply of the film carrier material coextruded with the elastomeric film material thereby forming a laminate which is apertured in a secondary process, said composite material having elastic properties such that the force required to extend the composite material 100% is from about 366 g/cm to about 524 g/cm.
Dependencies are inferred from the claim text.