HYDROPHOBIC FINISHING OF POLYESTER CLOTHING TEXTILES

摘要

The aim of this study was to prepare and evaluate functional polyester textiles with hydrophobic finishing applied by impregnation and back-coating using selected waterproof finishing systems. Results of impregnation and coating systems and the combination of these processes in both sequences (preimpregnation - coating and coating-postimpregnation) were evaluated in terms of hydrophobicity: hydrostatic head, spray-test, influence on air permeability and water vapour permeability. Two polyester woven fabrics with different square weight and construction have been finished and compared. For impregnation, fluorochemical has been utilized. This reagent has an ability to reduce the surface tension of the fabric considerably; hence it repels both water and oily liquids. Fluorochemical also exhibits good chemical and thermal stability. Furthermore, has low reactivity due to their incompatibility with water and oil. For coating, two resins namely: acrylic and acrylic/polyurethane (80:20) were used and therefore their performance being compared for properties mentioned above, whereby Werner Mathis CH-8155 laboratory foulard was utilized to carry out both impregnation and coating using floating knife technique for coating.%Cílem studie bylo p?ipravit a testovat polyesterové oděvní textilie s hydrofobní úpravou aplikovanou impregnací, zátěrem a jejich kombinací. Hodnocení vhodnosti úprav pro oděvní ú?ely bylo testováno zji??ováním prody?nosti a propustnosti vodních par upravenymi polyesterovymi textiliemi.