Polyethyene and articles produced therefrom
kiA polyethylene resin having an a parameter of between 0.20 and 0.40 and an MWD of between 1 to 6.
1. A resin comprising:
polyethylene having a rheological breadth parameter (a parameter) of between 0.20 and 0.40, a molecular weight distribution (MWD) of between 2 and 3.5, and a density of from about 0.918 to 0.950 g/cm 3 as measured by ASTM D792;
wherein the water vapor transmission rate of a film made of the polyethylene ranges from 0.90 to 1.30 g/100 in 2 /day/mil, as measured by ASTM 1249.
2. The resin of claim 1 , wherein the a parameter is between 0.28 to 0.36.
3. The resin of claim 1 , wherein the polyethylene has a density of from about 0.920 to 0.940 g/cm 3 as measured by ASTM D792.
4. The resin of claim 1 , wherein the water vapor transmission rate of a film made of the polyethylene ranges from 0.90 to 1.1 g/100 in 2 /day/mil, as measured by ASTM 1249.
5. The resin of claim 1 , wherein the polyethylene has an MI2 of between 1 and 16 as measured by ASTM D1238 (190° C./2.16 kg).
6. The resin of claim 5 , wherein the polyethylene has an MI2 of between 3 and 6 as measured by ASTM D1238 (190° C./2.16 kg).
7. The resin of claim 1 , wherein the polyethylene is a metallocene catalyzed polyethylene.
8. A cast film made in accordance with claim 1 , wherein the polyethylene is a metallocene catalyzed polyethylene.
9. A coating material comprising the resin of with claim 1 .
10. A cast film or coating comprising:
a polyethylene resin having a rheological breadth parameter (a parameter) of between 0.28 to 0.36, a molecular weight distribution (MWD) of between 2 and 3.5, and a density of from about 0.918 to 0.950 g/cm 3 as measured by ASTM D792;
wherein the water vapor transmission rate of the cast film or coating ranges from 0.90 to 1.30 g/100 in 2 /day/mil, as measured by ASTM 1249.
11. The cast film or coating of claim 10 , wherein the polyethylene resin has a density of from about 0.920 to 0.940 g/cm 3 as measured by ASTM D792.
12. The cast film or coating of claim 10 , wherein the polyethylene resin has an MI2 of between 3 and 6 as measured by ASTM D1238 (190° C./2.16 kg).
13. The cast film or coating of claim 10 , wherein the water vapor transmission rate is from 0.90 to 1.20 g/100 in 2 /day/mil, as measured by ASTM 1249.
14. The cast film or coating of claim 10 , wherein the 1% Secant Modulus in the machine direction is from 17,000 to 23,000 psi as measured by ASTM D882, A.
15. The cast film or coating of claim 10 , wherein the tensile strength yield in the machine direction is from 900 to 1300 psi as measured by ASTM D882, A.
16. The cast film or coating of claim 10 , wherein the tensile strength yield in the transverse direction is from 900 to 1300 psi as measured by ASTM D882, A.
17. The cast film or coating of claim 10 , wherein the elongation yield in the machine direction is from 8 to 16% as measured by ASTM D882, A.
18. The cast film or coating of claim 10 , wherein the elongation break in the machine direction is from 500 to 1100% as measured by ASTM D882, A.
19. The cast film or coating of claim 10 , wherein the polyethylene resin is a metallocene catalyzed polyethylene resin.
20. A cast film or coating comprising:
a metallocene catalyzed polyethylene resin having a rheological breadth parameter (a parameter) of between 0.20 to 0.40, a molecular weight distribution (MWD) of between 1 and 6, and a density of from about 0.918 to 0.950 g/cm 3 as measured by ASTM D792;
wherein the cast film or coating exhibits a water vapor transmission rate of from 0.90 to 1.30 g/100 in 2 /day/mil, as measured by ASTM 1249.