Claims
- 1. A breathable, stretch-thinned elastic film, comprising:a high performance styrene block copolymer elastomer; a low performance metallocene catalyzed polyolefin elastomer; the high and low performance elastomers being present in a weight ratio of about 50-80 parts by weight high performance elastomer and about 20-50 parts by weight low performance elastomer, based on a combined weight of high and low performance elastomers; and a plurality of filler particles; the film having a water vapor transmission rate of at least about 1000 grams/m2/24 hours.
- 2. A breathable, stretch-thinned elastic film comprising:a high performance styrene block copolymer elastomer; a low performance ethylene copolymer elastomer having a density less than 0.90 grams/cm3; the high and low performance elastomers being present in a weight ratio of about 50-80 parts by weight high performance elastomer and about 20-50 parts by weight low performance elastomer, based on a combined weight of high and low performance elastomers; and a plurality of filler particles; the film having a water vapor transmission rate of at least about 1000 grams/m2/24 hours.
- 3. The breathable, stretch-thinned film of claim 1 or 2, wherein the styrene block copolymer elastomer comprises a tetrablock copolymer.
- 4. The breathable, stretch-thinned film of claim 1 or 2, wherein the styrene block copolymer elastomer comprises a diblock copolymer.
- 5. The breathable, stretch-thinned film of claim 1 or 2, wherein the low performance elastomer comprises an ethylene-alpha olefin copolymer in which the alpha-olefin is selected from the group consisting of 1-octene, 1-butene, 1-hexene and 4-methyl pentene.
- 6. The breathable, stretch-thinned film of claim 5, wherein the low performance elastomer has a density of about 0.86-0.89 grams/cm3.
- 7. The breathable, stretch-thinned film of claim 1 or 2, wherein the filler particles comprise inorganic filler particles.
- 8. The breathable, stretch-thinned film of claim 7, wherein the filler particles comprise calcium carbonate.
- 9. The breathable, stretch-thinned film of claim 1 or 2, comprising greater than about 50% by weight of the filler particles.
- 10. The breathable, stretch-thinned film of claim 1 or 2, comprising about 51-70% by weight of the filler particles.
CROSS REFERENCE TO RELATED APPLICATION
This application claims the benefit of U.S. Provisional Application No. 60/162,649 filed Nov. 01, 1999 and is a continuation-in-part application of U.S. patent application Ser. No. 09/685,070 filed Oct. 10, 2000, now abandoned.
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Provisional Applications (1)
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Number |
Date |
Country |
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60/162649 |
Nov 1999 |
US |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
09/685070 |
Oct 2000 |
US |
Child |
09/696735 |
|
US |