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Schwarz I.G.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu | Schwarz I.G.,University of Zagreb | Kovacevic S.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu | Dimitrovski K.,University of Ljubljana | Katovic D.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu
Tekstil | Year: 2010

The paper compares the pre-wet sizing process to the standard sizing process. On the basis of the performed treatments and investigatios all the advantages as well as disadvantges of the new sizing process are discribed. Sizing was done using PVA size with a concentration of 7.5%. Materials used in this research are ring-spun cotton yarns with counts of 20, 30 and 50 tex, on which for the purpose of the sizing procedure relevant physical mechanical yarn properties were tested by standard methods. Sizing increases yarn strength and abrasion resistance, and reduces yarn hairness, affecting the reduction of warp yarn breaks in the weaving process as well as the increase in weaving machine efficiency and finished fabric quality. The values of the tested sized yarns, regardless of the sizing procedure, do not deviate significantly, meaning that the new sizing procedure has an advantage due to the saving of sizes and energy. The results obtained confirm that the new pre-wet sizing process is a really efficient technological process which can contribute to savings of sizing agents, water, energy and environmental protection without any consequences for the quality of the sized yarn.


Vujasinovic E.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu | Vujasinovic E.,University of Zagreb | Gersak J.,University of Maribor | Dragcevic Z.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu | Dragcevic Z.,University of Zagreb
Tekstil | Year: 2010

Today, in the era of advanced technologies, the traditional evaluation of certain types of textile materials and their usability, i.e. suitability for a particular purpose becomes a thing of the past. The modern concept of quality is incorporated in the new approach to quality in the center of which is the user, so it is not surprising that in recent decades research has been intensified in the field of objective evaluation (especially handle) and a complex evaluation of fabric quality. Although traditional denim fabric has been present on the market and known in the clothing industry for ages, it is influenced by fashion trends and is increasingly modified using various finishing procedures (bleaching, stone washing, etc), thus changing its original shape, and the concept of quality by consumers. With respect to the more frequent and favored use of enzymes in finishing processes, this paper investigates the quality and possibility of objective evaluation of the handle of enzyme treated denim fabrics from the group of a amylases and cellulases. Performed enzymatic desizing and washing of denim fabrics generally improve the overall value of handle (THV), i.e. flexibility and handle of the material, although in the case of repeated washing they can lead to unwanted consequences such as changes of colour, durability and stability of 3D shapes.


Soljacic I.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu | Soljacic I.,University of Zagreb | Pusic T.,Tekstilno tehnoloski Fakultet Sveucilista U Zagrebu
Tekstil | Year: 2010

The detergents added to the solvent enhance the cleaning properties of a solvent and prevent the generation of static electricity in dry cleaning process. The composition of detergents depends on the solvent type and the choice of cleaning process. The basic component in all combinations is surfactant. Novel approach is based on the application of ionic and nonionic surfactants. The synergism between surfactants and other ingredients improves a detergency and prevents redeposition of stains on textile materials. The paper deals with composition and properties of detergents and fundamental approach to the performance of detergents in dry cleaning process. A new model of lamellar shaped micelles in solvent is recommended.


Soljacic I.,Tekstilno tehnoloski fakultet Sveucilista u Zagrebu | Pusic T.,Tekstilno tehnoloski fakultet Sveucilista u Zagrebu
Tekstil | Year: 2011

Care procedures for dry cleaning solvents perchlorethylene and hydrocarbons are described in the paper. The significance of regular control and purification of solvents, applying filtration, distillation and neutralization, is emphasized with regard to the quality of cleaned textiles, blocking of bacterial growth, preservation of the machine and environment. More rigorous regulations require cleaning in the closed system of the dry cleaning machine and purification of contact water in order to achieve less than 0.5 mg/I PERC before discharging into watercourses.

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