Back to results
US 6,638,636 B2Granted
Breathable multilayer films with breakable skin layers
AssigneeKimberly-Clark Worldwide, Inc.
InventorJohn David Tucker
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeKimberly-Clark Worldwide, Inc.
InventorJohn David Tucker
Estimating the term…
A breathable multilayer film having a breathable core layer and at least one skin layer is disclosed. The core layer prepared by from a mixture containing a thermoplastic polymer and a particulate filler and the skin layer or layers are prepared from a mixture of at least two incompatible polymers and a polymer which compatiblizes the incompatible polymers. The addition of the compatiblizer in the skin layer improves the film forming consistency. In addition, the core layer contains voids around the particulate filler and the skin layer or layer has cracks or voids, which provides breathability to the multilayer film. Stretching of the film after the layers are coextruded together forms the voids and/or cracks. The multilayer film of the present invention can be laminated with woven and nonwoven materials and the multilayer film of the present invention, whether or not the films are laminated with other materials, are useful in a wide variety of personal care products, medical garments and other product in which breathability is desired.
A multilayer breathable stretch-thinned film comprising a core layer and a skin layer on at least one side of the core layer wherein
A process for preparing a multilayer breathable film comprising:
A process of preparing a breathable laminate comprising:
Dependencies are inferred from the claim text.