PROCESS FOR OBTAINING CELLULOSIC FABRICS RESISTANT TO UV RADIATIONS

The invention relates to a process for obtaining cellulosic fabrics resistant to UV radiations, applicable in the field of textile chemical finishing. According to the invention, the process consists of the fact that it is performed in two stages, in the first stage there is performed the graft of t...

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Bibliographic Details
Main Authors GRIGORIU ANA MARIA, LUCA CONSTANTIN, GRIGORIU AURELIA
Format Patent
LanguageEnglish
Romanian
Published 30.03.2010
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Summary:The invention relates to a process for obtaining cellulosic fabrics resistant to UV radiations, applicable in the field of textile chemical finishing. According to the invention, the process consists of the fact that it is performed in two stages, in the first stage there is performed the graft of the support, which is a flax fabric having the fineness 50/2 tex, cloth binding, and a specific mass of 211 g/m2, with monochlorotriazinyl-beta-cyclodextrin by using a technique of the thermal padding-drying-fastening type, by padding with a solution of monochloro-beta-cyclodextrin 50...150 g/l and sodium carbonate 10...100g/l, pH=11, impregnation time 5...10 min, then squeezing, air-drying, thermal fastening in drying closet for 5...15 min at 90...150A C, removing the reactive excess by repeated warm and cold washing with distilled water, up to a pH of 6.5...7 and drying at the room temperature and in the second stage there are included in the cavity the grafted remainders of triazinyl-beta-CD of some UV absorbers which are obtained by immersing the samples at the room temperature in the solution of an UV absorber 7...12 g/l in a 7/3 ethanol/water mixture, duration of magnetic stirring 1...3 hours, then successive warm and cold washing with distilled water, the hot-extraction of the reactive excess for 5 hours in a 7/3 ethanol/water mixture and final drying at the room temperature. Invenţia se referă la un procedeu de obţinere a unor ţesături celulozice rezistente la radiaţii UV, aplicabil în domeniul finisării chimice textile. Procedeul conform invenţiei constă în aceea că se realizează în două faze: în prima fază are loc grefarea suportului, care este o ţesătură de in cu fineţea 50/2 tex, legătură pânză şi cu o masă specifică 211 g/m2, cu monoclorotriazinil-beta-ciclodextrină, printr-o tehnică de tip de fulardare-uscare-fixare termică, prin fulardare cu o soluţie de monocloro-beta-ciclodextrina 50...150 g/l şi carbonat de sodiu 10...100 g/l, ph=11, timp de impregnare 5...10 min, apoi stoarcere, uscare în aer, fixare termică în etuvă timp de 5...15 min la 90...150°C, îndepărtarea excesului de reactivi prin spălări repetate calde şi reci, cu apă distilată, până la un pH de 6,5...7 şi uscare la temperatura camerei, iar în faza a doua are loc includerea în cavitatea resturilor grefate de triazinil-beta-CD a unor absorberi UV, care se realizează prin imersarea mostrelor la temperatura camerei, în soluţia unui absorber UV 7...12 g/l, într-un amestec de etanol/apă 7/3, timp de agitare magnetică 1...3 h, apoi spălări succesive, calde şi reci, cu apă distilată, extracţia la cald a excesului de reactivi timp de 5 h, într-un amestec de etanol/apă 7/3 şi uscare finală la temperatura camerei.
Bibliography:Application Number: RO20070000665