20.500.12556/RUL-173381 Uporaba pigmentov v epoksidnih zalivkah in površinska obdelava lesno-plastičnega kompozita Use of pigments in epoxy fillings and surface treatment of wood-plastic composite V sodobni industriji in podjetjih se poleg funkcionalnosti izdelkov vse več pozornosti namenja tudi njihovi estetiki. Med izstopajočimi trendi so epoksidne smole, ki se ponašajo z izjemno širokim spektrom uporabnosti. V diplomski nalogi smo se osredotočili na določitev minimalne koncentracije pigmenta, potrebne za doseganje zadovoljive prekrivnosti epoksidne zalivke, ter raziskali, ali je z dodatno površinsko obdelavo mogoče doseči enoten in estetsko privlačen videz površine. V raziskavi smo uporabili dve vrsti epoksidnih smol (Crystalres in Aquares) ter štiri pigmente različnih barv (bela, črna, oranžna, roza) v koncentracijah 0,5 %, 1 %, 2 % in 3 %. Ugotovili smo, da kakovost vmešavanja in utrjevanja smole ni odvisna le od vrste in koncentracije pigmenta, temveč tudi od vrste smole. Z meritvami barv na beli in črni podlagi ter izračunom barvnih razlik smo dokazali, da prekrivnost epoksidne zalivke poleg koncentracije pomembno določa tudi vrsta uporabljenega pigmenta. Naknadna površinska obdelava epoksidnih zalivk ni predstavljala večjih težav, vendar smo ustrezno vizualno enotnost dosegli le z vodnim lakom, ki je imel nekoliko slabšo oprijemnost. Preskus odpornosti proti hladnim tekočinam pa je potrdil, da je površinska zaščita epoksidne zalivke ključna, saj le tako učinkovito odpravimo njeno sicer nizko odpornost. In modern industry and commerce, increasing attention is being paid to the aesthetics of products in addition to their functionality. Notable trends include epoxy resins, which are known for their extraordinarily wide range of applications. The aim of this work was to determine the minimum pigment concentration required to achieve satisfactory opacity of an epoxy resin casting, and to investigate whether an additional surface treatment can achieve a uniform and aesthetically pleasing surface appearance. In the study, two types of epoxy resins (Crystalres and Aquares) were used together with four different coloured pigments (white, black, orange and pink) at concentrations of 0.5%, 1%, 2% and 3%. The results showed that the quality of the resin mixture and curing depends not only on the type and concentration of the pigment, but also on the type of resin itself. By measuring colours on white and black substrates and calculating colour differences, we were able to prove that the opacity of an epoxy resin casting is strongly influenced not only by the concentration, but also by the type of pigment used. The subsequent surface treatment of the epoxy casts did not pose any major difficulties; however, a uniform visual appearance was only achieved with a water-based varnish, which had weaker adhesion. The resistance test against cold liquids confirmed that surface protection of the epoxy resin casting is essential, as this is the only way to effectively overcome its otherwise low resistance. epoksi pigment premaz epoxy pigment coating true false false [Z. Logar] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-09-17 07:17:12 2025-09-17 07:17:16 2025-11-08 03:51:19 0000-00-00 00:00:00 2025 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829 264656 249257987 51536.pdf 51536.pdf 1 621936D8236A63C2FC4BACACE6561DBA f3de753f7f069b62299bba30372ba44839468a07ed6a990b841460dcd96161b5 6781c286-9385-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=217789 Biotehniška fakulteta 0 0 0