Franka Zuvela Bosnjak

University of Zagreb · Department of Textile and Clothing Design

Raw bovine leather (hide) undergoes a series of manufacturing processes to obtain a finished leather or semi-finished leather, which as such can last for a long period without damage to the hide. The damage by bacteria in the tannery is almost entirely restricted to the soaking operation, but some damages occur under poor storage conditions after p...

Proces štavljenja ima najvažniju ulogu u postizanju trajnosti kože, čemu pridonosi umrežavanje stabilizirajući trostruku spiralnu strukturu kolagena. Čvrstoća nastalih veza ovisi o vrsti sredstva za štavljenje. Zbog dobrih svojstava kože nakon štavljenja, kao i same učinkovitosti, danas se najčešće koriste mineralna štavna sredstva. Međutim, zbog e...

The paper aimed at enhancing the antimicrobial activity of chitosan by using tea tree essential oil with the purpose of durably finishing cotton fabrics for use in a hospital environment. The influence of crosslinkers and catalysts on the possibility of obtaining stable bonds using hydrothermal in situ synthesis between cellulosic material and chit...

The influence of differently tanned and finished bovine leather on thermophysiological properties was investigated. In addition, it was investigated whether sampling has a significant influence on the thermophysiological properties. The back of the tested leathers is thicker than the neck because of better microstructure regularity and uniformity a...

Full grain refers to the strongest and most durable part of the cattle hide, consisting of the grain layer and the part of the underlying corium, and has not been sanded or buffed to remove any imperfections, that means it displays the more natural characteristics of leather. Leather quality changes with sampling location and were also affected by...

U ovom radu je istražen utjecaj temperature sušenja na sorpcijska svojstva goveđe sintetski štavljene hidrofobirane kože. Kože su sušene na uređaju za sušenje uz primjenu vakuuma pri temperaturi od 40, 45, 50 i 55 °C u vremenu od 90 sekundi nakon provedbe štavljenja, nadoštave, bojanja i mašćenja u realnom proizvodnom procesu. Ispitivanjem apsorpci...

The quality and properties of fire resistance are crucial to the selection of leather for the production of protective fire fighting boots, which has a primarily protective role. During fire extinguishing it is exposed to extremely high and low temperatures, chemicals (acids and alkalis), mechanical loads, etc. The properties of fire resistance wer...

Kvaliteta i svojstva otpornosti na gorenje (toplinu i plamen) ključni su za odabir kože pri proizvodnji zaštitnih vatrogasnih čizama. Tijekom gašenja požara koža je izložena ekstremno visokim i/ili niskim temperaturama, kemikalijama (kiselinama i lužinama), mehaničkim opterećenjima i sl. Svojstva otpornosti na gorenje testirana su na dva uzorka goveđ...

U radu su ispitana svojstva otpornosti na zapaljenje i širenje plamena dvaju uzoraka vatrootpornih goveđih koža te njihova otpornost na djelovanje topline uz praćenje plinovitih produkata koji se javljaju prilikom toplinske razgradnje. Uzorci su podvrgnuti termogravimetrijskoj analizi (TGA) uz praćenje plinovitih produkata razgradnje (TG-IR) tijekom...

This paper aims to investigate fire resistance properties of two samples of fireproof bovine leather; both with smooth and perforated brushed surfaces. Apart from flammability and flame spreading, an important property is heat resistance and the development of gaseous products that occur during heat degradation. For the purpose of characterizing th...