Entwicklung und Erprobung biologisch abbaubarer oder eliminierbarer Schlichten zur Substitution biologisch resistenter, nicht eliminierbarer Produkte Schlussbericht

Most textile mills use sizes based on synthetic agents. In practice these products are not or only partly biodegradable. Therefore they should not run into municipal treatment plants. Nevertheless the market share of these sizes has been increasing continuously during the last few years. The main reason is: synthetic sizes meet best the requirements of modern weaving technology, while starch based biogradable sizes don't do this satisfactory. Therefore the aim of the research project is to develop size agents based on modified starch which are high-efficient and well biogradable and/or to modifiy synthetic sizes to improve their biogradability and elimination rate in purification processes. These new products will be tested at sizing and desizing processes under practical conditions in weaving and finishing mills. Furthermore the disposability of the resulting effluent in municipal waste water treatment respectively its degradability in aerobic biological purification processes will be examined. The new products will also be tested for their recovery in the ultrafiltration processes as well as for biodegradability in anaerobic processes. The project is being realizes by the ITV Denkendorf together with industrial partners, such as leading manufactorers of size agents and weaving and finishing mills. The Kolb and Schuele AG, Kirchheim/Teck, performed broken end analysis on their normally sized warps. The results can b e a standard of comparison for forthcoming tests of new products. The standard warps showed good performance in weaving. Due to being oversized a compared test warp did not perform as well. Another test warp was sized with a product of a project partner and was woven and desized under practical conditions in the mill. At the beginning of the project the ITV Denkendorf did adhesive power measurements of three types of cotton fibre of Kolb and Schuele AG to find out the best suitable fibres for this testing method. In cooperation with the ITV the weaving and sizing departments were analyzed to get a good base for the tests of the new sizing agents. (orig.)Available from TIB Hannover: DtF QN1(27,16) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman