Interpolymers suitable for multilayer films
The present invention relates to compositions and processes of making and using interpolymers having a controlled molecular weight distribution. Multilayer films and film layers derived from novel ethylene/α-olefin interpolymers are also disclosed.
1. An ethylene/α-olefin interpolymer which has
(i) a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 17% of the total area under the DSC melting curve from −20° C. to the end of melting;
(ii) a density from about 0.875 g/cc to about 0.915 g/cc; and
(iii) a I 10 /I 2 from 5.5 to 6.5.
2. The ethylene/α-olefin interpolymer of claim 1 having no long chain branching.
3. The ethylene/α-olefin interpolymer of claim 1 which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 19% of the total area under the DSC melting curve from −20° C. to the end of melting.
4. The ethylene/α-olefin interpolymer of claim 1 which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is from at least about 19% to about 35% of the total area under the DSC melting curve from −20° C. to the end of melting.
5. The ethylene/α-olefin interpolymer of claim 1 which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 21% of the total area under the DSC melting curve from −20° C. to the end of melting.
6. The ethylene/α-olefin interpolymer of claim 1 which has a density from about 0.895 g/cc to about 0.910 g/cc.
7. The ethylene/α-olefin interpolymer of claim 1 wherein the I 10 /I 2 is from about 5.6 to about 6.3.
8. The ethylene/α-olefin interpolymer of claim 1 wherein the interpolymer has a molecular weight distribution in the range from about 2.0 to about 3.8.
9. The ethylene/α-olefin interpolymer of claim 1 wherein the interpolymer has a molecular weight distribution in the range from about 2.2 to about 2.8.
10. The ethylene/α-olefin interpolymer of claim 1 which has a B value of greater than about 0.98.
11. The ethylene/α-olefin interpolymer of claim 1 having a density from 0.895 g/cc to 0.915 g/cc.
12. The ethylene/α-olefin interpolymer of claim 1 wherein the ethylene/α-olefin interpolymer is an ethylene/octene copolymer.
13. A film comprising:
an ethylene/α-olefin interpolymer which has
(i) a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 17% of the total area under the DSC melting curve from −20° C. to the end of melting;
(ii) a density from about 0.875 g/cc to about 0.915 g/cc; and
(iii) a I 10 /I 2 from 5.5 to 6.5.
14. The film of claim 13 wherein the ethylene/α-olefin interpolymer has no long chain branching.
15. The film of claim 13 wherein the ethylene/α-olefin interpolymer has a density from about 0.895 g/cc to about 0.915 g/cc.
16. The film of claim 13 wherein the ethylene/α-olefin interpolymer has a I 10 /I 2 from about 5.6 to about 6.3.
17. A multilayer film comprising:
a) a base layer comprising a first polymer;
b) a tie layer comprising a second polymer; and
c) a sealant layer comprising an ethylene/α-olefin interpolymer,
wherein the tie layer is between the base layer and the sealant layer and wherein the ethylene/α-olefin interpolymer of the sealant layer has
(i) DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 17% of the total area under the DSC melting curve from −20° C. to the end of melting;
(ii) a density from about 0.875 g/cc to about 0.915 g/cc; and
(iii) a I 10 /I 2 from 5.5 to 6.5.
18. The multilayer film of claim 17 wherein the ethylene/α-olefin interpolymer has no long chain branching.
19. The ethylene/α-olefin interpolymer of claim 17 which has a density from about 0.895 g/cc to about 0.915 g/cc.
20. The ethylene/α-olefin interpolymer of claim 17 wherein the I 10 /I 2 is from about 5.6 to about 6.3.