FIELD: polymers, chemical technology.
SUBSTANCE: invention describes multiplayer, thermowelding, biaxially oriented polypropylene film consisting of a basic layer and at least one thermowelding external layer. The basic layer comprises from 1 to 15 weight % of resin with an average molecular mass (Mw) = 600-1500 Da and 1-6 weight % of wax with an average molecular mass (Mn) = 200-700 Da. Part of insoluble n-heptane in polypropylene basic layer has isotactic index at least 95% measured by 11C-NMP spectroscopy method. Polypropylene has a ratio Mw/Mn = 1-10. Also, invention describes a method for making film and its application.
EFFECT: improved making method, valuable properties of film.
16 cl, 2 tbl, 20 ex
