Primerjava različnih metod za določanje oprijemnosti utrjenih premazov na les : diplomsko delo - visokošolski strokovni študij

Podpečan, Tilen (author), Petrič, Marko (mentor), Pavlič, Matjaž (co-mentor), Gornik Bučar, Dominika (reviewer)

Ugotavljali smo povezave med rezultati določanja oprijemnosti premaznih sistemov, ki jih dobimo z različnimi metodami. Na bukove vzorce smo nanesli različne premazne sisteme: vodni, UV utrjujoči vodni in poliuretanski lak. Za določanje oprijemnosti smo uporabili različne metode, in sicer test s križnim rezom (SIST EN ISO 2409) ter 3 različice metode z odtrgovanjem pečatov (SIST EN 4624). Tako dobljene rezultate smo med seboj primerjali in statistično obdelali z računalniškim programom Statgraphics Centurion XVI. Izvedli smo test variance in nato z Duncanovim testom pri 95 % stopnji zaupanja dobljene rezultate razvrstili v homogene skupine. Rezultate, ki jih dobimo z metodo križnega reza, je nesmiselno primerjati s tistimi, ki jih dobimo s postopkom odtrgovanja pečatov. Možna pa je primerjava rezultatov, dobljenih s 3 različicami metode odtrgovanja pečatov. Najboljšo oprijemnost smo dosegli z UV-lakom, sledil je poliuretanski lak, najslabše rezultate pa smo dobili pri vodnem sistemu.

• Language: Slovenian
• Keywords: bukovina, vodni laki, UV lak, poliuretanski lak, oprijemnost, križni rez, odtrgovanje pečatov
• Work type: Undergraduate thesis
• Typology: 2.11 - Undergraduate Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [T. Podpečan]
• Year: 2014
• Number of pages: IXI, 37 f., [5] f. pril.
• PID: 20.500.12556/RUL-117626
• UDC: 674.07
• COBISS.SI-ID: 2341513
• Publication date in RUL: 17.07.2020

Secondary language

• Language: English
• Title: A comparison of different methods for the determination of adhesion of cured coatings on wood

Abstract

We were establishing the link between the results of determining the adhesion of coating systems obtained by various methods. We applied different coating systems on beech wood samples: water-borne, UV-curing water-borne and polyurethane finishes. To determine the adhesion we used different methods, namely the cross-cut test (SIST EN ISO 2409), and 3 versions of the pull-off test method (SIST EN 4624). The results were compared and statistically analyzed with a Statgraphics Centurion XVI computer program. We conducted a test of variance, after which the results were sorted into homogeneous groups with Duncan's test at the 95 % level of confidence. Comparison of the results obtained by the method of cross-cutting with those obtained by the pull-off test method does not make any sense. However, it is possible to compare the results obtained by the 3 versions of the pull-off test method. The best adhesion strength was achieved with UV-curing finish, followed by the polyurethane coating, and the worst results were obtained with the water-borne system.

• Keywords: beech wood, UV curing finish, polyurethane coating, water borne lacquer, adhesion, pull-off test, cross-cut test