TWISTING OF MULTI-FOLDED YARNS AND THREADS MANUFACTURED BY MEANS OF NEW SPINNING TECHNOLOGIES

Dominika Rosiak, Krystyna Przybył

Technical University of Łódź
Faculty of Engineering and Marketing of Textiles
Department of Technology and Structure of Yarns
ul. Żeromskiego 116, 90-543 Łódź, Poland

      This paper includes an analysis of the properties of multi-folded yarns and threads manufactured by means of various spinning technologies, and an analysis of its twisting processes. Considerations related to the influence of twist value of the component fibre streams on the twist value of multi-folded threads, and the influence of the twist value of yarns and multi-folded threads on their processing throughput, are also presented.
 

DEVELOPMENT OF X-RAY FLUORESCENCE-BASED METHODOLOGY FOR QUALITY CONTROL OF ZARI USED IN SILK SARIS
 

Babu Rao

India
 

      The traditional Kancheepuram silk sari still maintains its appeal, and has a significant market share. Gold-coated silver thread (zari) is used in this sari. The quality, and hence the price of the sari, is dependent on the composition of the zari. Until now there has been no qualified method of assessing this. This paper presents an X-ray fluorescence-based method of assessing the zari.

A QUICK, RELIABLE, AND ECONOMIC METHOD FOR EVALUATING THE PROPERTIES OF ROTOR-SPUN YARN

Dipayan Das, Saiyed Muzaffar Ishtiaque,
Department of Textile Technology, Indian Institute of Technology, Delhi, India

Tai Mac, Dieter Veit, Thomas Gries
Institute for Textile Technology Aachen, RWTH Aachen University of Technology, Germany
 

      An attempt has been made to evaluate the primary and secondary properties of blended rotor-spun yarn both quickly and reliably from only a small sample of fibre. The concept of the quickspin system of yarn production is partially utilised in this research work. The natural and synthetic fibres are blended in a 50/50 ratio according to five different methods on an Uster Micro Dust and Trash Analyser 3 (MDTA 3), and the best blending method is evaluated with the help of a suitable image analysis technique. Furthermore, the reliability of rotor-spun yarns produced from MDTA 3 slivers with conventionally produced rotor-spun yarns from card and draw-frame slivers has been checked in terms of their properties.
 

DIDENTIFYING THE CAUSE OF DESTRUCTION OF TEXTILE LINEAR STRUCTURES
 

Jerzy Słodowy, Aleksandra Rutkowska

Department of Textile Architecture
Technical University of Łódź
ul. Żeromskiego 116, 90-543 Łódż, Poland
 

The article presents investigations into the mechanism of continuity loss of textile linear products. A method and tools for implementing it have been developed with the aim of investigating loose textile products, and determining the causes of their destruction. Special emphasis is placed on the usability of the procedure we accepted for investigating the resistance of the product’s structure to the action of an aerodynamic force which occurs during the transport of weft with a weak structure. Two mechanisms of yarn breakage, especially that of loose wefts, have been differentiated. The first consists in breaking fibres which form the yarn, and the second in mutual slippage of fibres. Both mechanisms can be determined by analysing the force-elongation curves over yarn stretching in both static and dynamic conditions. The influence of an air stream acting longitudinally to the yarn, its velocity and time of action were also determined, with the aim of recognising the conditions of pneumatic weft transport.
 

A FUNCTIONAL WOVEN FABRIC WITH CONTROLLED FRICTION COEFFICIENTS PREVENTING BEDSORES
 

Marek Snycerski, Izabela Frontczak-Wasiak
 

Department of Textile Architecture
Faculty of Engineering and Marketing of Textiles
Technical University of Łódź
ul. Żeromskiego116, 90-543 Łódź, Poland
 

This article presents the design and manufacture of a double-layer woven fabric with different friction coefficients on the right and left sides of the fabric, and additional of the friction coefficient differentiated by direction of the fabric. Cotton and viscose yarns have been used as raw materials for the production of woven fabric, taking into account the future use of such a fabric for anti-bedsore sheets.
 

PREPARATION OF NATURAL SILK WASTE SOLUTIONS BY HIGH FREQUENCY HEATING
 

Iroda Nabieva¹, Bakhtiyar Sadriddinov¹, Makhfuza Khasanova¹, Khalima Alimova¹, Kaisa Klemola² & John Pearson³

¹Tashkent Institute of Textile and Light Industry, Uzbekistan,
²Kuopio Academy of Design, Finland,
³University of Huddersfield, UK,
 

Natural silk waste is an important by-product of the silk industry in Uzbekistan. Solutions to the problem of natural silk waste have been used to improve the properties of the locally produced polyacrylonitrile fibre. Nitron, and the effectiveness of this dissolution process, are very important to the textile industry in Uzbekistan. Previous methods used to dissolve natural silk waste have been time-consuming and relatively inefficient. This paper describes a new method for dissolving natural silk waste, using a high-frequency electromagnetic field.
 

DISPOSAL OF WOOL SCOURING SLUDGE BY COMPOSTING
 

John Pearson, Fen Lu and Kimti Gandhi

Department of Textiles, University of Huddersfield, Queensgate, Huddersfield, UK
 

Disposal of wool scouring sludge is becoming more problematical, due to the need to satisfy environmental legislation concerning what is regarded as hazardous waste, and to the increasing cost of landfill and the scarcity of landfill sites. Composting the sludge to produce a safe, saleable product could be a viable alternative.
 

FIBROUS-WOOD SORBENT FOR ELIMINATING OIL POLLUTION
 

S. Nenkova, R. Garvanska, S. Jelev

University of Chemical Technology and Metallurgy, Kl. Ochridski 8, 1756 Sofia, Bulgaria
 

In this paper, we examine the possibility of eliminating oil pollution by using fibrous-wood sorbents on the basis of short wool fibres, technical hydrolysis lignin, wood sawdust and barks. The sorption ability of waste fibrous-wood materials has been investigated by determination of Chemical Oxygen Demand (COD). The special sorption patterns by net cover and fibrous-wood compositions as a nucleus have been prepared. The sorbents on the basis of technical hydrolysis lignin (THL) and wool shoddy have high sorption ability to oil pollution.