Polietilenska folija izdelana iz recikliranega polimera

Petrič, Nina (author), Gregor Svetec, Diana (mentor)

Plastično embalažo srečujemo vsak dan, nam najbližje so plastične vrečke, ki jih najdemo v vseh trgovinah, sestavina teh vrečk pa je polietilen. Diplomsko delo obravnava polietilensko folijo, izdelano iz recikliranega polietilena nizke gostote (LDPE). V raziskavo sta bili vključeni foliji, izdelani iz recikliranega in primarnega LDPE ter sekanci recikliranega LDPE. V uvodnem delu so predstavljeni statistični podatki o količini odpadne embalaže v Sloveniji in Evropski uniji, v nadaljevanju je predstavljena embalaža iz polietilena, opisane so lastnosti, pridobivanje in uporaba LDPE. Teoretični del zajema tudi recikliranje embalaže, podrobneje je opisan postopek recikliranja polietilenske embalaže. V eksperimentalnem delu so z uporabo različnih metod preiskav opravljene analize sekanca in folije, izdelane iz recikliranega in primarnega LDPE. Na podlagi rezultatov meritev tališča in FTIR spektroskopije je bilo ugotovljeno, da reciklirana folija vsebuje le LDPE, druge vrste polimerov pa ne. Analiza tehnoloških lastnosti kaže, da se foliji, izdelani iz primarnega in recikliranega polimera, razlikujeta, in sicer v masi in debelini, v reciklirani foliji so vidni vključki, nečistoče, to pa kažejo tudi rezultati meritev hrapavosti folij. Določene so bile tudi mehanske lastnosti folije, in sicer v obeh smereh, vzdolžni in prečni. Rezultati meritev nateznih lastnosti in sile nadaljnjega trganja so pokazali, da se foliji nekoliko razlikujeta v mehanskih lastnostih in da ima folija iz primarnega LDPE večinoma boljše mehanske lastnosti.

• Language: Slovenian
• Keywords: polietilen, LDPE, recikliranje, embalaža, folija, mehanske lastnosti
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2020
• PID: 20.500.12556/RUL-116509
• Publication date in RUL: 26.05.2020

PETRIČ, Nina, 2020, Polietilenska folija izdelana iz recikliranega polimera [online]. Bachelor’s thesis. [Accessed 13 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=116509

Secondary language

• Language: English
• Title: Polyethylene foil made from recycled polymer

Abstract

We come across plastic packaging every day, the closest we get are the plastic bags found in all stores. The component of these bags is polyethylene. The thesis deals with polyethylene foil made from recycled low density polyethylene (LDPE). The study included foils made from recycled and primary LDPE and granulate from recycled LDPE. The introductory part presents statistics on the amount of packaging waste in Slovenia and the European Union, the following part presents polyethylene packaging, describes the properties, production and use of LDPE. The theoretical part also covers the recycling of packaging, the recycling process for polyethylene packaging is described in more detail. In the experimental work, using the various methods of investigation, the performed granulate and foil analyzes were made, from recycled and primary LDPE. Based on the results of the melting point and FTIR spectroscopy measurements, it was found that the recycled film contains only LDPE and no other polymer types. The analysis of the technological properties shows that the films made of primary and recycled polymer differ in mass and thickness, inclusions, impurities are visible in the recycled film, as well as the results of measurements of the film roughness. The mechanical properties of the foil were determined in both directions, longitudinal and transverse. The results of measurements of tensile properties and tearing strength showed that the films differ slightly in mechanical properties and that the primary LDPE film generally has better mechanical properties.

• Keywords: polyethylene, LDPE, recycling, packaging, foil, mechanical properties