Prerada i ispitivanje mehaničkih svojstava recikliranih polietilenskih filmova

master's thesis

• Title (english): Production and testing of mechanical properties of recycled polyethylene films
• Author: Ana Marija Režek
• Mentor: Ana Pilipović (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2020-12-03, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Production Mechanical Engineering

Abstract

U ovom radu, nakon kratkih opisa konvencionalnih tipova polietilena, procesa proizvodnje i
primjene istih, detaljno su opisani proizvodni postupci ekstrudiranja filmova i folija. Na
primjeru tvrtke Optiplast d.o.o. prikazana je proizvodnja polietilenskih vrećica. Razrađen je
koncept kružnog gospodarenja otpadom i objašnjene su direktive Europske unije, koje se
direktno i indirektno odnose na plastičnu ambalažu. Navedene su alternativne zamjene za
polietilenske vrećice, za koje je, zajedno s konvencionalnim polietilenskim vrećicama,
prikazana analiza životnog vijeka proizvoda. Nabrojani su i objašnjeni načini oporabe
polimernih materijala s detaljnijim opisom mehaničkog recikliranja. U eksperimentalnom
dijelu provedeno je ispitivanje rastezne čvrstoće i rastezne žilavosti za uzorke s različitim
udjelom reciklata dobivenog sekundarnim recikliranjem. Ispitivanje je provedeno u smjeru
ekstrudiranja i okomito na smjer ekstrudiranja.

Abstract (english)

In this thesis, starting with a short description of conventional polyethylene types, production
processes and their applications, a detailed description of extrusion process for films and foils
is made. Company Optiplast d.o.o's production process is used as an example for production of
polyethylene bags. Furthermore, the concept of circular waste management is elaborated as well
as the European Union guidelines that are directly and indirectly referring to plastic packaging.
Alternative materials are listed for polyethylene bags, for which an Life-Cycle Analysis and
comparison is made. Methods for polymer material recycling are listed, with mechanical
recycling being described in depth. In the experimental part, an experiment of tensile strength
and tensile toughness is performed for samples with different ratios of recycled material from
secondary recycling. The experiment is performed in parallel as well as vertically to the
direction of the extrusion.

• Keywords: polietilen; ekstrudiranje; mehaničko recikliranje; rastezna svojstva
• Keywords (english): polyethylene; extrusion; mechanical recycling; tensile properties
• Language: croatian
• URN:NBN: urn:nbn:hr:235:840229
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-12-02 16:16:21