20.500.12556/RUL-333 Modificiran les za kuhinjske elemente diplomsko delo Modified wood for kitchen furniture elements visokošolski strokovni študij V podjetju, ki izdeluje kuhinjsko pohištvo, želijo v proizvodnjo vključiti modificiran les, ker je dimenzijsko stabilnejši. S postopkom modifikacije lahko vplivamo tudi na barvo, zato jim modificiranega lesa ne bi bilo treba lužiti. Pri tem pa je pomembno, da so klasični in vodni premazni sistemi kompatibilni z modificiranimi podlagami ter kako lastnosti modificiranega lesa vplivajo na lastnosti površinskega sistema. Na nemodificiranem ter v vakuumu termično (pri temperaturah 150 °C in 200 °C) modificiranem hrastovem lesu, smo preizkušali nekatere lastnosti: debelino, oprijemnost, odpornost proti udarcem, razenju in odpornost robov proti vodi, utrjenih filmov vodnega in poliuretanskega laka ter barvo in sijaj. Ugotovili smo, da je vodni lak slabo odporen proti mehanskim poškodbam ter da vrsta podlage močno vpliva tako na debelino utrjenega filma, na sijaj, kot tudi na odpornostne lastnosti površinskega sistema. Z višanjem temperature modifikacije se te lastnosti slabšajo, zmanjša pa se tudi debelina utrjenega filma. Najslabše lastnosti smo ugotovili pri preizkušancih, modificiranih pri 200 °C, pozitivno je izstopala le odpornost robov proti omočitvi z vodo. Kitchen furniture producer wants to introduce thermally modified wood into their regular production. Thermal modification of wood increases its dimensional stability and influences its colour, so there would be no need to stain it. However, there are questions, whether the classical waterborne coating systems are compatible with the modified substrates, and how the properties of modified wood influence characteristics of the system. Some properties: thickness, adhesion, resistance against impact and scratching, and resistance of edges against water of strengthened films of waterborne and polyurethane coatings were tested on untreated and in vacuum thermally modified (temperatures: 150 °C and 200 °C) oak wood; colour and gloss. It was found out that waterborne coatings showed low resistance against mechanical injuries, the type of the substrate influenced the thickness of strengthened film strongly, so as gloss, and properties of surface system. These properties get worse with too high a temperature of modification, also thickness of strengthened film reduces. The worst properties were found in wood samples, modified at 200 °C, the only exception being the resistance of edges against watering. hrastov les modifikacija lesa površinski premazi vodni laki poliuretanski laki odpornost oak wood wood modification surface coatings waterborne finishes polyurethane coatings resistance true false false [A. Šuštar] Slovenski jezik Angleški jezik Diplomsko delo 2014-07-11 12:25:08 2014-07-11 12:25:08 2022-07-11 10:18:51 0000-00-00 00:00:00 2008 0 Ljubljana 0 X, 54 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.1 1681033 vs_sustar_andrej.pdf vs_sustar_andrej.pdf 1 170341B00B919DB7E261685E085F5B07 2ee76446497640854d3e750293e9cf2321e25958f1ca34894e27de945e23ca37 5d18eb89-a1b9-11eb-a523-00155dcfd717 20.500.12556/rul/c784025d-da7e-4e9e-8e27-c98e5da0a6eb https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=132305 Biotehniška fakulteta 0 0 0