Polymer compositions having improved barrier properties
A unimodal polymer having a melt index of from about 0.5 g/10 min to about 4 g/10 min, a density of equal to or greater than about 0.945 g/cc which when formed into a film displays a moisture vapor transmission rate of less than about 0.55 g-mil/100 in 2 in 24 hours as determined in accordance with ASTM F 1249. A unimodal polymer having a melt index of from about 0.5 g/10 min to about 4 g/10 min, a density of equal to or greater than about 0.945 g/cc which when formed into a film displays a moisture vapor transmission rate of less than about 0.44 g-mil/100 in 2 in 24 hours as determined in accordance with ASTM F 1249.
1. A unimodal homopolymer having a melt index of from about 0.5 g/10 min to about 4 g/10 min, a density of equal to or greater than about 0.945 g/cc, a ratio of z-average molecular weight to weight average molecular weight (M z /M w ) of less than about 3.5 and a weight average molecular weight of from about 80 kg/mol to about 200 kg/mol which when formed into a 1 mil film displays a moisture vapor transmission rate of less than about 0.55 g-mil/100 in 2 in 24 hours as determined in accordance with ASTM F 1249 and a haze of less than about 40% as determined in accordance with ASTM D 1003.
2. The homopolymer of claim 1 having a molecular weight distribution of from about 2 to about 5.
3. The homopolymer of claim 1 which comprises polyethylene.
4. The homopolymer of claim 1 having a density of greater than about 0.955 g/cc as determined in accordance with ASTM D 1505.
5. A film formed from the homopolymer of claim 1 .
6. A food packaging container comprising the film of claim 5 .
7. A blown film formed from the homopolymer of claim 1 .
8. A blown film formed from the homopolymer of claim 4 .
9. The blown film of claim 8 having a haze percentage of less than about 35% as determined in accordance with ASTM D 1003.
10. A unimodal homopolymer having a melt index of from about 0.5 g/10 min to about 4 g/10 min, a density of equal to or greater than about 0.945 g/cc, a ratio of z-average molecular weight to weight average molecular weight (M z /M w ) of less than about 3.5 and a weight average molecular weight of from about 80 kg/mol to about 200 kg/mol which when formed into a 1 mil film displays a moisture vapor transmission rate of less than about 0.44 g-mil/100 in 2 in 24 hours as determined in accordance with ASTM F 1249 and a haze of less than about 40% as determined in accordance with ASTM D 1003.
11. The homopolymer of claim 10 having a molecular weight distribution of from about 2 to about 5.
12. The homopolymer of claim 10 which comprises a polymer of ethylene.
13. A film formed from the homopolymer of claim 10 .
14. A food packaging container comprising the film of claim 13 .
15. A blown film formed from the homopolymer of claim 10 .
16. A unimodal homopolymer having a melt index of from about 0.5 g/10 min to about 4 g/10 min, a density of equal to or greater than about 0.945 g/cc, a ratio of z-average molecular weight to weight average molecular weight (M z /M w ) of less than about 3.5 and a weight average molecular weight of from about 80 kg/mol to about 200 kg/mol which when formed into a 1 mil film displays a moisture vapor transmission rate of less than about 0.39 g-mil/100 in 2 in 24 hours as determined in accordance with ASTM F 1249 and a haze of less than about 40% as determined in accordance with ASTM D 1003.
17. The homopolymer of claim 16 having a molecular weight distribution of from about 2 to about 5.
18. A film formed from the homopolymer of claim 16 .
19. A food packaging container comprising the film of claim 18 .
20. A blown film formed from the homopolymer of claim 16 .