Very low density polyethylene with rapid crystallization rates

A film or film layer comprising an ethylene copolymer composition, the ethylene copolymer composition comprising:

• (i) from 15 to 75 weight percent of a first ethylene copolymer having a density of from 0.855 to 0.913 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• and
• (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 6.0;
• and a melt index, I2 of from 0.1 to 100 g/10 min;
• wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm3;
• a melt index, I2 of from 0.5 to 10 g/10 min;
• and at least 0.0015 parts per million (ppm) of hafnium;
• wherein the number average molecular weight, Mn1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn2 of the second ethylene copolymer and the number average molecular weight, Mn3 of the third ethylene copolymer;
• and
• wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%.

A multilayer film structure comprising at least one film layer comprising an ethylene copolymer composition, the ethylene copolymer composition comprising:

• (i) from 15 to 75 weight percent of a first ethylene copolymer having a density of from 0.855 to 0.913 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• and
• (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 6.0;
• and a melt index, I2 of from 0.1 to 100 g/10 min;
• wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm3;
• a melt index, I2 of from 0.5 to 10 g/10 min;
• and at least 0.0015 parts per million (ppm) of hafnium;
• wherein the number average molecular weight, Mn1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn2 of the second ethylene copolymer and the number average molecular weight, Mn3 of the third ethylene copolymer;
• and
• wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%.

A film or film layer comprising a polymer blend, the polymer blend comprising:

• (a) from 5 to 50 weight percent of an ethylene copolymer composition;
• and
• (b) from 95 to 50 weight percent of a linear low density polyethylene;
• wherein the ethylene copolymer composition comprises:
• (i) from 15 to 75 weight percent of a first ethylene copolymer having a density of from 0.855 to 0.913 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• and
• (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 6.0;
• and a melt index, I2 of from 0.1 to 100 g/10 min;
• wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm3;
• a melt index, I2 of from 0.5 to 10 g/10 min;
• and at least 0.0015 parts per million (ppm) of hafnium;
• wherein the number average molecular weight, Mn1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn2 of the second ethylene copolymer and the number average molecular weight, Mn3 of the third ethylene copolymer;
• and
• wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%.

A multilayer film structure comprising at least one film layer comprising a polymer blend, the polymer blend comprising:

• (a) from 5 to 50 weight percent of an ethylene copolymer composition;
• and
• (b) from 95 to 50 weight percent of a linear low density polyethylene;
• wherein the ethylene copolymer composition comprises:
• (i) from 15 to 75 weight percent of a first ethylene copolymer having a density of from 0.855 to 0.913 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• (ii) from 80 to 20 weight percent of a second ethylene copolymer having a density of from 0.865 to 0.930 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 2.7;
• and a melt index, I2 of from 0.1 to 10 g/10 min;
• and
• (iii) from 5 to 40 weight percent of a third ethylene copolymer having a density of from 0.855 to 0.936 g/cm3;
• a molecular weight distribution, Mw/Mn of from 1.7 to 6.0;
• and a melt index, I2 of from 0.1 to 100 g/10 min;
• wherein the ethylene copolymer composition has a density of from 0.860 to 0.910 g/cm3;
• a melt index, I2 of from 0.5 to 10 g/10 min;
• and at least 0.0015 parts per million (ppm) of hafnium;
• wherein the number average molecular weight, Mn1 of the first ethylene copolymer is greater than both the number average molecular weight, Mn2 of the second ethylene copolymer and the number average molecular weight, Mn3 of the third ethylene copolymer;
• and
• wherein the weight percent of the first, second or third ethylene copolymer is defined as the weight of the first, second or the third ethylene copolymer divided by the weight of the sum of (i) the first ethylene copolymer, (ii) the second ethylene copolymer and (iii) the third ethylene copolymer, multiplied by 100%.