METHODOLOGY FOR TESTING THE THICKNESS UNIFORMITY OF FOOD INDUSTRY FILMS
Published in GÉP 2025/3-4
https://doi.org/10.70750/GEP.2025.3-4.18
Kocsis Krisztián István
duális mérnök hallgató, Pannon Egyetem, ZalaZONE Ipari Park Zrt.
Boronyák Márton
duális mérnök hallgató, Pannon Egyetem, ZalaZONE Ipari Park Zrt.
Szabó Roland
vezető mérnök, TC-Zone Mérnöki Kft
Dr. Háry András
vezérigazgató, ZalaZONE Ipari Park Zrt.
ABSTRACT
The role of packaging technology is growing in industry, and the quality of the film used is often an important aspect during the related design tasks. The aim of the research was to comprehensively examine the thickness homogeneity of blown polyethylene (LDPE) films used in the food industry, with particular emphasis on comparing transverse (U-profile) and circular (polar profile) thickness distributions. Our goal was to determine the extent to which local inhomogeneities arising during production affect the mechanical behavior and tear resistance of the films. During the research, we integrated four complementary methods: tactile measurements on flat samples, polar profile measurements on inflated films, microscopic analysis on cross-sectional samples, and burst testing with high-speed camera recording. Based on the results, we also formulated industrial recommendations for increasing thickness stability and introducing online process monitoring.
