magistrsko delo
Matej Šverko (Author), Igor Plazl (Mentor), Marjan Marinšek (Thesis defence commission member), Rok Ambrožič (Thesis defence commission member)

Abstract

Filtracija je pogosto pomemben korak v modernih industrijskih procesih, kjer se izvaja ločitev snovi na podlagi velikosti delcev ali kemijskih lastnosti oziroma le zaščita procesnih komponent ter končnega produkta. Magistrsko delo se osredotoča na proces filtracije taline poliamida 6 in matične zmesi poliamida 6 med proizvodnjo filamentne preje. Raziskava uporablja fizikalne modele zakonov mašenja filtrnega medija za napovedovanje naraščanja tlaka taline med mašenjem filtra. Delo zajema teoretične osnove reologije, fluidne mehanike in mašenja filtra pri konstantnem padcu tlaka ter konstantnem volumskem pretoku. Proces mašenja filtra je analiziran skozi štiri mehanizme: popolno mašenje, delno mašenje, standardno mašenje in mašenje filtrne pogače. Na podlagi reoloških meritev kapilarnega reometra za določitev indeksa tokovnega obnašanja taline in določevanja disperzibilnosti pigmentega polnila v matični zmesi s preskusom na filtru po zgledu standarda SIST EN ISO 23900-5:2018. Izračunane so konstante mašenja za različne mehanizme med preizkusom na filtru in uporabljene skupaj z meritvami začetnega tlaka filtracije v šobnem paketu za belo in črno matično zmes za napoved naraščanja tlaka na proizvodnem sistemu. Ugotovljeno je dobro ujemanje napovedi modela popolnega mašenja pri beli matični zmesi ter ustrezen uspeh modela standardnega mašenja pri črni matični zmesi. Kljub temu so modeli omejeni z izbiro filtra med procesom analize in filtra med dejansko uporabo v proizvodnem sistemu. Drugi pomemben dejavnik, ki vpliva na točnost napovedi modelnih enačb, je homogenost materiala.

Keywords

zakoni mašenja;poliamid 6;matična zmes;talilno predenje;tok tekočin;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [M. Šverko]
UDC: 66.067.1(043.2)
COBISS: 193013507 Link will open in a new window
Views: 30
Downloads: 6
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Effect of filtration on the process of melt-spinning
Secondary abstract: Filtration is often a crucial step in modern industrial processes, where the separation of substances based on particle size or chemical properties is carried out, or simply for protecting process components and the final product. The master's thesis focuses on the filtration process of molten polyamide 6 and masterbatch based on polyamide 6 matrix during the production of filament yarn. The research utilizes physical models of blocking filtration laws to predict the increase in pressure of the polyamide 6 melt during filter clogging. The work encompasses theoretical foundations of rheology, fluid mechanics, and blocking filtration via constant pressure drop and constant volumetric flow. The filter clogging process is analysed through four mechanisms: complete clogging, partial clogging, standard clogging, and clogging of the filter cake. Based on rheological measurements from a capillary rheometer to determine the flow behaviour index of the melt and the dispersibility of pigment filler in the masterbatch through a filter pressure value test following the SIST EN ISO 23900-5:2018 standard, blocking constants are calculated for various mechanisms during the filter pressure value test. These constants are then applied together with measurements of the initial filtration pressure in the nozzle package for both white and black masterbatches to predict the pressure increase on the production line. A good match is observed in the predictions of the complete blocking model for the white masterbatch and satisfactory success of the standard clogging model for the black base mixture. Nevertheless, the models are constrained by the choice of filter during the analysis process and the filter during actual usage on the production line. Another crucial factor influencing the accuracy of model equations is the material's homogeneity.
Secondary keywords: filtration;blocking laws;polyamide 6;masterbatch;melt-spinning;Filtriranje;Reologija;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Study programme: 1000376
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo
Pages: 1 spletni vir (1 datoteka PDF (80 str.))
ID: 23451542