FOIL FOR LABELS AND COVER MEMBRANES
The invention relates to a foil having at least one first layer ( 1 ) comprising at least 50% of random heterophasic polypropylene (block) copolymer. The invention further relates to labels and cover membranes comprising the foil.
1 . Foil with at least one first layer ( 1 ) comprising at least 50 wt % of random heterophasic polypropylene (block) copolymer.
2 . Foil according to claim 1 , the first layer ( 1 ) comprising a further polypropylene polymer or polypropylene copolymer.
3 . Foil according to claim 1 or 2 , the foil comprising a second layer comprising polypropylene polymer or polypropylene copolymer ( 2 ).
4 . Foil according to claim 1 or 2 , the foil comprising as a second layer a barrier layer ( 3 ) impervious to mineral oils.
5 . Foil according to claim 4 , the barrier layer ( 3 ) comprising a polyamide copolymer.
6 . Foil according to either of claims 4 and 5 , the foil comprising an adhesion- promoting layer ( 4 ) between layers ( 1 ) and ( 3 ).
7 . Foil according to claim 6 , the foil comprising a layer ( 1 ′), corresponding in composition to layer ( 1 ), and comprising a second adhesion-promoting layer ( 4 ′) between layers ( 3 ) and ( 1 ′).
8 . Foil according to any of claims 1 to 7 , the thickness of the layer ( 1 ) being at least 5 μm.
9 . Foil according to any of claims 1 to 7 , the total thickness of the foil being at least 20 μm.
10 . Label comprising a foil according to any of claims 1 to 3 , paper ( 5 ) and pressure-sensitive adhesive ( 6 ).
11 . Cover membrane comprising a foil according to any of claims 4 to 7 and a tacky substance ( 7 ).
12 . Cover membrane according to claim 11 , the tacky substance ( 7 ) being bitumen or self-adhesive sealant.