Polyethylene/3-substituted alkene film made with Ziegler-Natta or chromium oxide catalyst

1. A film, comprising:

an unimodal interpolymer of ethylene, a 3-substituted C 4-10 alk-1-ene which is 3-methyl-1-butene, and a C 3-8 alkene monomer,

wherein

a density of the interpolymer is from 890 to 940 kg/m 3 ,

a content of transition metal per kg of interpolymer in the film is less than 300 μmol, and

the interpolymer is obtained by polymerization of a monomer composition comprising ethylene, the 3-substituted C 4-10 alk-1-ene and the C 3-8 alkene monomer in the presence of a catalyst system comprising a Ziegler Natta catalyst;

said catalyst is a heterogeneous catalyst in particulate form and comprises titanium as a transition metal component which is sigma-bonded to its ligands and an activator and said catalyst further comprises a particle building material;

wherein a weight % content of the 3-substituted C 4-10 alk-1-ene in the interpolymer is from 0.0 to 40 wt % based on a total weight of the interpolymer; and

wherein a weight % content of the ethylene in the interpolymer is at least 60 wt % based on the total weight of the interpolymer.

2. The film as claimed in claim 1 , wherein a Mw of the unimodal interpolymer is from 20,000 to 900,000.

3. The film as claimed in claim 1 , wherein a MFR 2 of the unimodal interpolymer is from 0.01 to 5000.

4. The film as claimed in claim 1 , further comprising polyethylene.

5. The film as claimed in claim 1 , further comprising an antioxidant.

6. The film as claimed in claim 1 which is a blown film or multilayer film or an industrial film.

7. A process for the preparation of a blown film, comprising:

blowing the unimodal interpolymer of claim 1 .

8. A laminate or an article or a packaging, comprising a film as claimed in claim 1 .

9. The film as claimed in claim 1 , wherein the Ziegler Natta catalyst comprises a chromium oxide catalyst.