Polyethylene composition for a film layer

1 . A multimodal polymer of ethylene with at least two different comonomers selected from alpha-olefins having from 4 to 10 carbon atoms,

which has

a) MFR 2 of 0.5 to 10 g/10 min (according to ISO 1133 at 190° C. under 2.16 kg load),

b) MFR 21 /MFR 2 of 13 to 35 (MFR 21 at 190° C. under 21.6 kg load) and

c) Mw/Mn of 4.5 to <6;

and which comprises at least

an ethylene polymer component (A), comprising ethylene polymer fraction (A-1) and ethylene polymer fraction (A-2) and

an ethylene polymer component (B),

wherein the MFR 2 of the ethylene polymer components (A) and (B) are different from each other,

wherein the MFR 2 of the ethylene polymer fractions (A-1) and (A-2) are different from each other,

wherein the density of the ethylene polymer fractions (A-1) and (A-2) are different by 5 kg/m 3 up to 35 kg/m 3 ;

wherein the ethylene polymer fraction (A-1) has a MFR 2 of 0.01 0.1 to 10 g/10 min;

wherein the ethylene polymer fraction (A-2) has a MFR 2 of greater than 10.0 to 150.0 g/10 min;

wherein the ethylene polymer component (A) has a MFR 2 of greater than 1.0 to 50 g/10 min; and

wherein the ethylene polymer component (B) has a MFR 2 of 0.01 to 1.0 g/10 min.

2 . The multimodal polymer of ethylene according to claim 1 , wherein

the ethylene polymer fraction (A-1) has a MFR 2 of 0.1 to 5.0 g/10 min;

the ethylene polymer fraction (A-2) has a MFR 2 of 12.0 to 130 g/10 min;

the ethylene polymer component (A) has a MFR 2 of 1.5 to 40 g/10 min; and

the ethylene polymer component (B) has a MFR 2 of 0.05 to 0.95 g/10 min.

3 . The multimodal polymer of ethylene according to claim 1 , wherein the MFR 2 of ethylene polymer component (A) is higher than the MFR 2 of ethylene polymer component (B), and wherein the ratio of the MFR 2 of ethylene polymer component (A) to the MFR 2 of the final multimodal polymer of ethylene is of 2.0 to 40.

4 . The multimodal polymer of ethylene according to claim 1 , wherein the at least two alpha-olefin comonomers having from 4 to 10 carbon atoms are 1-butene and 1-hexene.

5 . The multimodal polymer of ethylene according to claim 2 , wherein the multimodal polymer of ethylene is further multimodal with respect to comonomer type and/or comonomer content, wherein the alpha-olefin comonomer having from 4 to 10 carbon atoms of ethylene polymer component (A) is different from the alpha-olefin comonomer having from 4 to 10 carbon atoms of ethylene polymer component (B), or

wherein the alpha-olefin comonomer having from 4 to 10 carbon atoms of ethylene polymer component (A) is 1-butene and the alpha-olefin comonomer having from 4 to 10 carbon atoms of ethylene polymer component (B) is 1-hexene,

whereby the comonomer type of ethylene polymer fractions (A-1) and (A-2) is the same, or

the comonomer type of ethylene polymer fractions (a-1) and A-2) is 1-butene.

6 . The multimodal polymer of ethylene according to claim 1 , wherein the total amount (mol %) of alpha-olefin comonomer having from 4 to 10 carbon atoms, present in the ethylene polymer component (A) is of 0.03 to 5.0 mol % and wherein the total amount of comonomers present in the multimodal polymer of ethylene is of 0.5 to 10 mol %, and

wherein the amount (mol %) of alpha-olefin comonomer having from 4 to 10 carbon atoms present in the ethylene polymer component (B) is higher than the amount (mol %) of alpha-olefin comonomer having from 4 to 10 carbon atoms present in the ethylene polymer component (A).

7 . The multimodal polymer of ethylene according to claim 2 ,

wherein the multimodal polymer of ethylene is further multimodal with respect to density, or

the ethylene polymer fractions (A-1) and (A-2), as well as ethylene polymer component (A), have different or higher density than the density of the ethylene polymer component (B).

8 . The multimodal polymer of ethylene according to claim 1 , wherein the density of the ethylene polymer fractions (A-1) and/or (A-2), as well as of polymer component (A) is from 920 to 960 kg/m 3 , and the density of the ethylene polymer fractions (A-1) and (A-2) are different by 5 kg/m 3 up to 30 kg/m 3 and/or the density of the ethylene polymer component (B) is from 880 to less than 910 kg/m 3 .

9 . The multimodal polymer of ethylene according to claim 1 , wherein the density of the multimodal polymer of ethylene is from 910 to 935 kg/m 3 .

10 . The multimodal polymer of ethylene according to claim 1 , wherein the multimodal polymer of ethylene has MFR 21 /MFR 2 of 13 to 30.

11 . The multimodal polymer of ethylene according to claim 1 , wherein the multimodal polymer of ethylene is multimodal with respect to MFR, type of the comonomer, comonomer content and density.

12 . The multimodal polymer of ethylene according to claim 1 , wherein multimodal polymer of ethylene has a haze (measured on 40 μm blown films according to ASTM D 1003-00) of between 15 to below 32%, and/or a gloss (measured on 40 μm blown films at an angle of 45° in MD according to ASTM D2457) of above 20% up to 60%.

13 . The multimodal polymer of ethylene according to claim 1 , wherein the multimodal polymer of ethylene has a dart-drop impact strength (DDI) determined according to ASTM D1709, method A on a 40 μm multilayer blown film of at least 350 g up to 2500 g, and/or a tensile modulus determined according to ISO 527 at 23° C. on films with a thickness of 40 μm in machine direction as well as in transverse direction in the range of from 100 to 500 MPa.

14 . The multimodal polymer of ethylene according to claim 1 , wherein the multimodal polymer of ethylene is produced using a single site catalyst, or wherein the ethylene polymer component (A), including ethylene polymer fractions (A-1) and (A-2), and ethylene polymer component (B) of the multimodal polymer of ethylene are produced using same single site catalyst and/or wherein the multimodal polymer of ethylene (1) has an Mw/Mn between 4.5 and less than 6.0.

15 . An article comprising the multimodal polymer of ethylene according to claim 1 or a film comprising at least one layer which comprises the multimodal polymer of ethylene according to claim 1 .

16 . The multimodal polymer of ethylene according to claim 6 , wherein the alpha-olefin comonomer having from 4 to 10 carbon atoms, present in the ethylene polymer component (B), is 1-hexene, and the alpha-olefin comonomer having from 4 to 10 carbon atoms, present in the ethylene polymer component (A), is 1-butene.

17 . The multimodal polymer of ethylene with at least two different comonomers selected from alpha-olefins having from 4 to 10 carbon atoms according to claim 1 , made by a process comprising using a single site catalyst, wherein the ethylene polymer fractions (A-1) and (A-2) and the ethylene polymer component (B) are produced using the same single site catalyst.