FIELD: manufacturing technology.
SUBSTANCE: invention relates to a method of producing a cast film with improved barrier properties with respect to oxygen. Cast film contains a polyolefin composition containing a propylene homo- or copolymer, a hydrocarbon resin and a nucleating agent. Method comprises cooling an extruded film at a defined cooling temperature, which is preferably higher than the cooling temperature of the film having the same components in the same relative amounts, except that it does not contain a hydrocarbon resin.
EFFECT: cast film based on polypropylene provides improved barrier properties with respect to oxygen, which makes it suitable for packing perishable products.
8 cl, 2 tbl, 5 ex
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