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The paper presents the results of comparative tests of resistance to scratching of two polymer samples made by the extrusion method. The first sample was a homogenous
low-density polyethylene Lupolen 2426 H, while the second sample was a two-layer polymer of the same thickness with an outer layer of polypropylene Marlex HGX-030SP
and an inner layer of Lupolen 2426 H. The Micro Scratch Tester and the Dektak 150 profilometer were used to perform the appropriate measurements. The following values
were recorded: coefficient of friction, force of friction, depth of indenter penetration and residual depth after scratching. Surface profilograms and box-whisker diagrams of
hardness, width of the gap and area of the crack cross-section were made. The results of the research indicate the possibility of applying polypropylene to a layer protecting
low-density polyethylene against mechanical damage, especially against scratches.
