Izboljšanje zapornih lastnosti embalažnega papirja s premazi iz naravnih polimerov

Glavič, Nuša (author), Vrabič Brodnjak, Urška (mentor)

V diplomskem delu je bila izdelana raziskava biopolimernega premaza iz šelaka in testirana raztopina SWANLAC ASL 10 na treh različnih vrstah kartona iz tujerodnih rastlin. Eden izmed ciljev je bil ugotoviti, v kolikšni meri je zgoraj navedena raztopina v kombinaciji s kartonom ustrezna za potrebe embaliranja. V teoretičnem delu so predstavljene osnovne funkcije embalaže, podrobneje opisani pojmi papir in karton ter postopek pridelave šelaka. Navedeni so tudi drugi proizvajalci biopolimernih premazov in možnosti, ki jih ponujajo. Za testiranje raztopine so uporabljene tri vrste kartonov iz različnih tujerodnih rastlin, in sicer rozge, dresnika in akacije, ki so nastali v okviru projekta APPLAUSE na Inštitutu za celulozo in papir v Ljubljani. Navedena so različna področja uporabe šelaka in opisana je raztopina, s katero so bili v eksperimentalnem delu kartoni premazani, posušeni, zrezani na predvidene formate in uporabljeni za nadaljnjo analizo. Testirane so bile osnovne, mehanske, površinske in strukturne lastnosti šestih različnih vzorcev, treh nepremazanih in treh premazanih z raztopino SWANLAC ASL 10. Vzorci so bili tudi potiskani z UV kapljičnim tiskalnikom, s čimer je bila preverjena kvaliteta tiska in njihova obstojnost na drgnenje. Po testiranju so bile preračunane povprečne vrednosti, standardni odkloni in variacijski koeficienti, meritve pa so bile med seboj podrobno primerjane. Rezultat diplomskega dela je testirana raztopina, ki bi jo v kombinaciji s specifičnimi vrstami kartonov lahko uporabljali za potrebe ustvarjanja bariere pri embaliranju in zmanjšali uporabo nerazgradljivih plastičnih premazov.

• Language: Slovenian
• Keywords: ekološka embalaža, šelak, biopolimerni premaz, invazivne tujerodne rastline
• Work type: Bachelor thesis/paper
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Year: 2022
• PID: 20.500.12556/RUL-137585
• Publication date in RUL: 22.06.2022

Secondary language

• Language: English
• Title: Improving the barrier properties of packaging paper with biopolymer coatings

Abstract

In this thesis, research on biopolymer coating from shellac was performed and a solution of SWANLAC ASL 10 was tested on three different types of cardboard from non-native invasive plants. One of the objectives was to determine the extent to which the above solution in combination with cardboard is suitable for packaging purposes. The theoretical part presents the basic functions of packaging and describes the terms paper and cardboard, as well as the process of shellac production in more detail. Other manufacturers of biopolymer coatings and the options they offer are also listed. Three types of cartons from various non-native plants named twigs, knotweed and acacia, which were created within the project APPLAUSE at the Institute of Pulp and Paper in Ljubljana, were used to test the solution. Different areas of application of shellac were listed and the solution in which the cartons were coated, dried, cut into the intended format and used for further analysis, was described in detail. The basic, mechanical, surface and structural properties of six different samples — three without coating and three coatedwiththeSWANLACASL10solution— weretested.Thesampleswerealso printed with an UV droplet printer, checking the print quality and their abrasion resistance. After testing, average values, standard deviations and coefficients of variation were calculated, and the measurements were compared in detail. The result of the diploma thesis titled "Improving the Barrier Properties of Packaging Paper With Biopolymer Coatings" is a tested solution that could be used in combination with specific types of cardboard for the purpose of creating a barrier in packaging and reducing the use of non-degradable plastic coatings.

• Keywords: ecological packaging, shellac, biopolymer coating, invasive plants