Projects / Programmes source: ARIS

Rationalisation of cotton bleaching for sanitary products

Research activity

Code Science Field Subfield
2.14.02  Engineering sciences and technologies  Textile and leather  Textile chemistry 

Code Science Field
T470  Technological sciences  Textiles technology 
bleaching, hydrogen peroxide, peroxiacetic acid, sanitary products, total organic carbon, polypropilene nonwovens, agrotextiles, UV permeability
Evaluation (rules)
source: COBISS
Researchers (11)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  11411  PhD Sabina Bračko  Communications technology  Researcher  2002 - 2004  254 
2.  11766  PhD Petra Eva Forte Tavčer  Textile and leather  Head  2002 - 2004  391 
3.  01310  PhD Marija Gorenšek  Textile and leather  Researcher  2002 - 2004  298 
4.  08610  PhD Diana Gregor Svetec  Communications technology  Researcher  2002 - 2004  703 
5.  19706  PhD Mateja Kert  Textile and leather  Researcher  2002 - 2004  161 
6.  13754  PhD Maja Klančnik  Textile and leather  Researcher  2002 - 2004  126 
7.  20045  PhD Petra Kovačič  Textile and leather  Researcher  2002 - 2003  43 
8.  18612  Dušana Leskovšek    Researcher  2002 - 2004 
9.  18610  Zdenka Lindič    Researcher  2002 - 2004 
10.  08393  PhD Barbara Simončič  Textile and leather  Researcher  2002 - 2004  496 
11.  18611  Janez Zajec    Researcher  2002 - 2003 
Organisations (1)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,782 
Cotton fibres used for sanitary products have to meet both - the textile-technological and the pharmacological requirements. By hydrogen peroxide bleaching the fibres are purified from unwanted substances and become properly absorbable and white. Beside the bleaching, activating and stabilising agents, the wetting agents, which provide more efficient bleaching and shorter bleaching time, are added to the bleaching liquor. Since pharmaceutical regulations require complete removal of these agents from fibres, intense rinsing after bleaching is necessary and, consequently, large quantities of rinsing water are used. From ecological and economical reasons the bleaching processes, which would need smaller quantities of auxiliary agents or will use the agents that would be easily removed after bleaching, should be searched for. The quality of the processed fibres should not be affected, of course. Our intention is to monitor the amount of surfactants in rinsing water and the residue on fibres by using the methods prescribed for sanitary products by pharmacopoeia, and to test the suitability of the method for determination of total organic carbon (TOC) in such solutions. We also intend to perform bleaching with peroxiacetic acid which is ecologically adequate bleaching agent. The whiteness of the processed material would be determined colorimetrically on a remission photometer and typical mechanical and physical properties of the material prior and after processing would be identified. A part of researches would be dedicated to polypropylene nonwovens designet for sanitary products and agrotextiles. The possibilities of improving mechanical and permeability properties of fibres as well as the possibilities of streamlining their products would be investigated. We intend to manufacture the nonwovens from the blends of fibres of different manufacturers which would provide more cost-effective production. As to the agrotextiles our intention is to determine their UV permeability.
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