A shrink film comprising a polyethylene film of thickness 5 to 500 μm, wherein the polyethylene comprises an ethylene homopolymer-copolymer mixture having a molecular weight distribution in the range of 5 to 40, and a weight average molecular weight of at least 100 kD.
1. A process for wrapping an object comprising applying a shrink film about said object and shrinking said film by the application of heat thereto, wherein said film is a shrink film comprising a polyethylene film of thickness 5 to 500 μm, wherein said polyethylene comprises an ethylene homopolymer-copolymer mixture having an ethylene homopolymer component and a ethylene copolymer component, the ethylene homopolymer-copolymer mixture having a molecular weight distribution in the range 5 to 40 and a weight average molecular weight of at least 100 kD, the ethylene homopolymer component having a density of 960 to 980 kg/m 3 .
2. An object shrink wrapped with a shrink film comprising a polyethylene film of thickness 5 to 500 μm, wherein said polyethylene comprises an ethylene homopolymer-copolymer mixture having an ethylene homopolymer component and an ethylene copolymer component, the ethylene homopolymer-copolymer mixture having a molecular weight distribution in the range 5 to 40 and a weight average molecular weight of at least 100 kD, the ethylene homopolymer component having a density of 960 to 980 kg/m 3 .
3. The object shrink wrapped as claimed in claim 2 , wherein the ethylene copolymer component has a density of 890 to 920 kg/m 3 .
4. The object shrink wrapped as claimed in claim 2 , wherein the Mw of the ethylene homopolymer-copolymer mixture is 150 to 300 kD.
5. The object shrink wrapped as claimed in claim 2 , wherein the Mw of the ethylene homopolymer-copolymer mixture is at least 230 kD.
6. The object shrink wrapped as claimed in claim 2 , wherein the MWD of the ethylene homopolymer-copolymer mixture is in the range 10 to 35.
7. The object shrink wrapped as claimed in claim 6 wherein the MWD of the ethylene homopolymer-copolymer mixture is in the range 15 to 25.
8. The object shrink wrapped as claimed in claim 2 , wherein the ratio of the ethylene homopolymer component to the ethylene copolymer component in the ethylene homopolymer-copolymer mixture is in the range 1:5 to 5:1 by weight.
9. The object shrink wrapped as claimed in claim 8 wherein the ratio of the ethylene homopolymer component to the ethylene copolymer component in the ethylene homopolymer-copolymer mixture is in the range 60:40 to 40:60 by weight.
10. The object shrink wrapped as claimed in claim 2 , wherein the ethylene copolymer component comprises ethylene and 1-butene or ethylene and 1-hexene.
11. The object shrink wrapped as claimed in claim 2 , wherein the ethylene copolymer component comprises an ethylene, 1-butene and 1-hexene terpolymer.
12. The object shrink wrapped as claimed in claim 2 , wherein said film has a thickness of 20 to 120 μm.
13. The object shrink wrapped as claimed in claim 2 , wherein said shrink film is a multilayer film.
14. The object shrink wrapped as claimed in claim 2 , wherein said shrink film is unilamellar.
15. The object shrink wrapped as claimed in claim 14 , said shrink film having a thickness of 100 to 200 μm.
16. The object shrink wrapped as claimed in claim 2 , wherein said film exhibits at least 15% shrink in the transverse direction upon application of heat.
17. The object shrink wrapped as claimed in claim 13 wherein said multilayer film comprises a layer in which at least 95% wt is formed from said ethylene homopolymer-copolymer mixture.
18. The object shrink wrapped of claim 2 , said shrink film having a Dart drop value (g)/film thickness (μm) of 5 g/μm or more.
19. The object shrink wrapped of claim 18 , wherein the film is unilamellar.
20. The object shrink wrapped of claim 18 , wherein Dart drop value (g)/film thickness (μm) is 6 g/μm or more.
21. The object shrink wrapped as claimed in claim 2 , wherein the density of the homopolymer-copolymer mixture is 920 to 945 kg/m 3 .
22. The object shrink wrapped as claimed in claim 2 , wherein the ethylene copolymer component has a density of 890 to 920 kg/m3, and wherein the Mw of the ethylene homopolymer-copolymer mixture is 150 to 300 kD.