THE SLIP-REDUCING MECHANISM IN POLYPROPYLENE-LAMINATED FILMS STUDIED BY FTIR AND XPS

FTIR spectroscopy and X-ray photoelectron spectroscopy (XPS) were appl ied to examine the slip-reducing mechanism of polypropylene-laminated films. The relationship between the slip and the amount of lubricants was established on the basis of quantitative analysis of lubricants on the cast and laminated polypropylene film surfaces. The results sugge sted that erucic amide used as a lubricant for the cast film migrated from the film surface into the adhesive layer, probably due to intermo lecular interactions (hydrogen bonds) with an isocyanurate-ether-polyo l used as an adhesive for laminating the films. This enabled us to und erstand the slip-reducing mechanism in the laminated films.