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1. (WO2007001619) LOW COST MULTILAYER ELASTOMERIC FILMS HAVING A LOW PERMANENT SET
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CLAIMS
What is presently claimed is:

1. An elastomeric composition comprising:

at least one styrene block copolymer; and

at least one elastomer or plastomer which is substantially free of styrene block copolymer, and wherein the elastomeric composition has a permanent set substantially equal to or less than an elastomeric composition containing only styrene block copolymer.

2. The elastomeric composition of claim 1, wherein the elastomer or plastomer is a thermoplastic polyolefm, thermoplastic polyurethane, or polyvinyl ether.

3. The elastomeric composition of claim 2, wherein the thermoplastic polyolefm is a member selected from the group consisting essentially of: ethylene copolymers, ethylene/poly-α-olefm copolymers, an amino-compatibilized polyolefm, a blend of ethylene/poly-oolefm and amino-compatibilized polyolefin ethylene/propylene copolymers, ethylene/propylene/diene terpolymers, metallocene polyolefin, combinations thereof, or derivatives thereof.

4. The elastomeric composition of claim 1, wherein the elastomer or plastomer is an ethylene/propylene copolymer or a polypropylene copolymer.

5. The elastomeric composition of claim 1, wherein the composition further comprises at least one additive selected from the group consisting of: color concentrates, process aids, lubricants, stabilizers, hydrocarbon resins, antistatics, viscosity reducing polymers, plasticizers, antioxidants, bonding aids, slip agents, heat stabilizers, photostabilizers, glass bubbles, microfibers, and antiblocking agents.

6. A multilayer elastomeric film comprising:
at least one styrene block copolymer layer; and

at least one non-styrene block elastomer or plastomer layer, and

wherein the multilayer elastomeric film has a permanent set substantially equal to or less than an elastomeric film comprised only of styrene block copolymer.
7. The multilayer elastomeric film of claim 6, wherein the non-styrene block elastomer layer is comprised of an ethylene/propylene copolymer or a polypropylene copolymer.
8. A coextruded polymeric multilayer film comprising:
at least one layer comprising a styrene block copolymer; and
at least one layer consisting essentially of an elastomer or plastomer substantially free of styrene block copolymer, and
wherein the coextruded polymeric multilayer film has a permanent set substantially equal to or less than a coextruded polymeric multilayer film comprised only of styrene block copolymer.
9. The coextruded polymeric multilayer film of claim 8, wherein the elastomer or plastomer is a thermoplastic polyolefin, thermoplastic polyurethane, or polyvinyl ether.

10. The coextruded polymeric multilayer film of claim 8, wherein the elastomer or plastomer is an ethylene/propylene copolymer or polypropylene copolymer.

11. The coextruded polymeric multilayer film of claim 8, wherein the film further comprises at least one additive selected from the group consisting of: color concentrates, neutralizers, process aids, lubricants, stabilizers, hydrocarbon resins, antistatics, viscosity reducing polymers, plasticizers, antioxidants, bonding aids, slip agents, heat stabilizers, photostabilizers, glass bubbles, microfibers, and antiblocking agents.

12. A polymeric multilayer film laminate comprising:

at least one layer comprising a styrene block copolymer; and

at least one layer consisting essentially of an elastomer or plastomer substantially free of styrene block copolymer, and

wherein the polymeric multilayer film laminate has a permanent set substantially equal to or less than a polymeric multilayer film laminate comprised only of styrene block copolymer.

13. The polymeric multilayer film laminate of claim 12, wherein the elastomer or plastomer is a thermoplastic polyolefin, thermoplastic polyurethane, or polyvinyl ether.

14. The polymeric multilayer film laminate of claim 12, wherein the elastomer or plastomer is an ethylene/propylene copolymer or propylene copolymer.

15. The polymeric multilayer film laminate of claim 12, wherein the film further comprises at least one additive selected from the group consisting of: color concentrates, neutralizers, process aids, lubricants, stabilizers, hydrocarbon resins, antistatics, viscosity reducing polymers, plasticizers, antioxidants, bonding aids, slip agents, heat stabilizers, photostabilizers, glass bubbles, microfibers, and antiblocking agents.

16. A multilayer elastomeric film comprising:
at least one core layer containing a styrene block copolymer; and at least two outer layers containing a non-styrene block copolymer elastomer or plastomer, and
wherein the multilayer elastomeric film has a permanent set substantially equal to or less than that of a multilayer elastomeric film comprised only of styrene block copolymer.
17. The multilayer elastomeric film of claim 16, wherein the non-styrene block copolymer elastomer or plastomer is a thermoplastic polyolefin, thermoplastic polyurethane, or polyvinyl ether.
18. The multilayer elastomeric film of claim 17, wherein the thermoplastic polyolefm is an ethylene/propylene copolymer or polypropylene copolymer.

19. The multilayer elastomeric film of claim 16, wherein the film has a thickness of about 5 mils or less.

20. A method of manufacturing a multilayer elastomeric film, the method comprising the step of:
coextruding at least one styrene block copolymer layer with at least one elastomer or plastomer layer substantially free of styrene block copolymer, wherein the resultant multilayer elastomeric film has a permanent set substantially equal to or less than that of a coextruded multilayer elastomeric film containing one or more layers of styrene block copolymer only.
21. The method of claim 20, wherein the method further comprises the step of providing an additive for inclusion with or incorporation into the film.

22. The method of claim 21, wherein the additive is a member selected from the group consisting of: color concentrates, neutralizers, process aids, lubricants, stabilizers, hydrocarbon resins, antistatics, viscosity reducing polymers, plasticizers, antioxidants, bonding aids, slip agents, heat stabilizers, photostabilizers, glass bubbles, microfibers, and antiblocking agents.
23. The method of claim 20, wherein the elastomer or plastomer layer comprises a thermoplastic polyolefm, a thermoplastic polyurethane, or a polyvinyl ether, a combination thereof, or a derivative thereof.
24. The method of claim 20, wherein the elastomer or plastomer layer is an ethylene/polypropylene copolymer or polypropylene copolymer.
25. The method of claim 20, wherein the method further includes the step of casting the multilayer elastomeric film.
26. The method of claim 20, wherein the method further includes the step of cast embossing the multilayer elastomeric film.
27. An elastomeric product produced in accordance with the process as set forth in claim 20.
28. A method of manufacturing a multilayer elastomeric film, the method comprising the steps of:
providing at least one core layer consisting of a styrene block copolymer; and providing at least two outer layers comprising a non-styrene block elastomer or plastomer, and
wherein the resultant multilayer elastomeric film has a permanent set substantially equal to or less than the permanent set of a multilayer elastomeric film consisting only of styrene block copolymer.

29. The method of claim 28, wherein the method further comprises the step of providing an additive.
30. The method of claim 28, wherein the non-styrene block elastomer or plastomer is an ethylene/propylene copolymer or propylene copolymer.
31. An elastomeric product produced in accordance with the process as set forth in claim 28.
32. A method of manufacturing a multilayer elastomeric film laminate, the method comprising the step of:
laminating at least one styrene block copolymer layer with at least one elastomer or plastomer layer, wherein the resultant multilayer elastomeric film laminate has a permanent set substantially equal to or less than that of a multilayer elastomeric film laminate containing only one or more layers of styrene block copolymer.
33. An elastomeric product produced in accordance with the process as set forth in claim 32.

34. A component for an absorbent article comprising:

at least one non-woven outer layer; and
at least one elastomeric film inner layer attached to the non-woven outer layer, and wherein the elastomeric film inner layer comprises:
at least one layer comprising a styrene block copolymer; and

at least one layer consisting essentially of an elastomer or plastomer, and wherein the elastomeric film inner layer has a permanent set substantially equal to or less than an absorbent article containing an elastomeric film inner layer comprised only of styrene block copolymer.
35. A multilayer elastomeric film comprising:
at least one core layer comprising between about 20% to about 99% by weight of a styrene block copolymer based upon the total weight of the elastomeric film;
at least one inner layer positioned on at least one side of the core layer, wherein the inner layer comprises between about 1% to about 90% by weight of an non-styrene block copolymer elastomer or plastomer based upon the total weight of the elastomeric film; and
at least one outer layer positioned on at least one side of the inner layer, wherein the outer layer comprises between about 0% to about 60% by weight of a high density polyethylene and low density polyethylene copolymer, or combinations thereof, based upon the total weight of the elastomeric film; and
wherein the multilayer elastomeric film has a permanent set substantially equal to or less than the permanent set of a multilayer elastomeric film consisting only of styrene block copolymer.
36. A laminate comprising:
at least one non- woven layer; and
at least one elastomeric film layer laminated to the non-woven layer wherein the elastomeric film layer further comprises:
at least one styrene block copolymer; and at least one elastomer or plastomer which is substantially free of styrene block copolymer, and
wherein the elastomeric film layer has a permanent set substantially equal to or less than an elastomeric film layer containing only styrene block copolymer.
37. An elastomeric film comprising:

at least one skin layer; and

at least one core layer comprising:
at least one styrene block copolymer; and
at least one elastomer or plastomer which is substantially free of styrene block copolymer, and
wherein the elastomeric film has a permanent set substantially equal to or less than an elastomeric film containing only styrene block copolymer.
38. The elastomeric film of claim 37, wherein the skin layer is a polyolefϊn skin.