Successful Cleaning of Mercerizing Lye

Recovery and reuse of caustic soda used in cotton mercerizing leads to a buildup of impurities in the mercerizing lye. Methods to remove the impurities from the recycled lye include a membrane filter, self cleaning weak lye filters an sedimentation tanks, and hydrogen peroxide treatment. Precleaning cotton fabrics by washing, suctioning, ..

Optimizing Dyeing Process Control through Improved Modeling

Researchers developed a variable structure controller and investigated the use of sequential injection analysis (SIA) as a real time data acquisition system. Experiments using the self organizing fuzzy logic sliding mode controller (SMC) simulated a two dye dyeing process and evaluated the control profiles temperature, and salt content of..

New Developments in Barrier Test Methods

When OSHA promulgated rules to minimize employee exposure to bloodborns pathogens, it did not specify a barrier test method for protective clothing. Early tests developed by the American Association of Textile Chemists and Colorists, the Association of the Nonwoven Fabric Industry, and the American Society for Testing and Materials(ASTM) ..

Fundamental Dye Diffusion and Surface Treatment of Fibers.

Laser scanning confocal microscopy (LSCM) studied the diffusion of fluorescein into nylon 66 fibers. LSCM derived high resolution three dimensional images of the fluorescein spatial distribution in the dyed fibers. Dye distribution data agreed with those derived by ultraviolet-visible spectro photometry, which was a more invasive method. ..

Ultrasound and textiles - Part II

Ultrasound technology has been researched and used for a variety of applications in liquids, disperse dyes and polymers. This article discusses the application of ultrasound technology in the wet processing of textiles; preparation of sizes; emulsions; dye dispersions; and thickeners for print paste. High energy ultrasonic waves accelerat..

Scouring the matrix

Chemical processes have long been used to remove or modify the cuticle to make cotton fiber water absorbent. Substitution of enzymes for such chemicals can mitigate environmental impact of effluents while lowering overall processing costs. Enzymatic hydrolysis is used widely in desizing, stone washing and bio-polishing, but research is no..

New cellulosic andorbents for removing some hazardous anions and anionic dyes from aqueous solutions

New aminated cellulosic adsorbents were prepared by reacting scoured flax, kenaf, and jute bast fibres, as host substrates, with Solidgen(R) (crosslinked polyethyleneimine-CPEI), as a modifier bearing amino groups, at pH 5 for 1 hr at 60℃ using a material-to-liquor ratio of 1;10. The use of the obtained products for the removal of (MnO₄..

Machines with the right chemistry

Clariant is a global textile chemical supplier headquartered at Mutteny, Switzerland. The company has entered into several R and D partnerships with finishing machinery companies, the results of which could be viewed at this years ITMA exhibition. This article provides a profile of Clariant and identifies a trio of chemicals devised by th..

Seminar on environmental issues: Technology options for textile industry

This seminar, organized by the Department of Textile Technology, Indian Institute of Technology, was held in Delhi on 6th and 7th November, 1998. The seminar was split into various sessions, all concerned with environmental issues in the following areas: Natural dyes and naturally coloured cottons; size reclamation; development of synthet..

Kannegiesser technologies: Fixing without risk (German) (Kannegiesser-technnologie: Fixieren ohne Risiko)

Fixing machines produced by the German company Kannegiesser Garment and Textile Technologies GmbH are presented. The important elements of the fixing machine are the heating, pressure and transport systems. Kannegiesser heating systems ensure a regular temperature and separately controllable heating zones make possible a fine adjustment o..