| abstract |
A process for sealing a polyethylene film to a substrate, preferably to a polyethylene film substrate, comprising bringing said polyethylene film and said substrate into contact and subjecting at least a part of the contact area to ultrasound so as to form a seal between said film and said substrate; wherein nsaid polyethylene film comprises a multimodal linear low density polyethylene copolymer comprising ethylene and at least one C3-20 alpha olefin comonomers and having a density of 905 to 940 kg/m 3 . |