Bleached Cotton Fibre Processing and End Uses. G.

Bleaching cotton fibers removes waxes, pectin, and other proteinaceous and plant materials and improves their absorbency to 24 times their weight. Batch processes bleach opened and cleaned cotton fibers in sliver or scutcher bales in lots of 500 or 1,000 kilograms. A series of washing and alkali treatments occurs in a high pressure boiler..

Quality Improvement in Spinning - Some Case Studies.

Case studies in yarn spinning quality improvement addressed fabric neppiness, thick defects, yarn breaks during winding, defects in 45s polyester/viscose blend yarns, improvements in Uster percentage, and fillingwise fabric unevenness. Defective operation of a positive clearer comb at the roving machine caused yarn neps. Proper selection ..

Important Events in the Evolution of Spinning Technology.

A review of the history of spinning technology describes the design and use of the most basic spinning instrument, the spindle, since the Neolithic Period; the design and use of the spinning wheel since its introduction in India in the eighth century; the transition of the spinning wheel to spinning machines; Arkwright's Waterframe spinni..

Process Capability Indices for Spinning Performance.

Process capability indexes measure the accuracy and precision of output of such continuous textile processes as carding, drawing, and ring spinning, as well as facilitate the evaluation of the quality of textiles during their manufacture. These indexes determine whether the product being manufactured falls within statistically acceptable ..

The P.ACSS spinning system (Pujol. Automatic Centrifugal Spinning System) (Spanish) (El sistema de hilatura P.ACSS (Pujol. Automatic Centrifugal Spinning system))

The P.ACSS spinning system is described. It is an automatic process of spinning and winding in an uninterrupted productive regime, in which twist is imparted by double centrifugal spindles in the successive phases of loading and unloading, complemented by pneumatic spinning elements. It has been described definitively at the experimental ..

Effect of core pretension and nozzle pressure on properties of Lycra/Viscose core-spun yarn

The basic requirement of all good sports wear, leisure wear, and inner wear are comfort, stretch ability and shape retention. One of the methods to produce yarn for stretch fabrics is introducing elastomeric filament in core and wrapping other filaments around it (corespun yarn). The stretchability and rapid recovery of such yarns depend ..

Simulation of spinning processes, systems and fibre products

The utilization of the most up to date methods of theoretical and experimental research has been critical to the success of new spinning systems, particularly rotor spinning, and to the optimization of technological systems. This article outlines some of the models of technological processes that have been applied to research problems and..

Getting control of your tension

Controlling tension is critical in tow cutting, with the radial blade tow cutter almost universally used to cut manmade fiber into staple. The working method is explained. The problems of tension being too high or too low are discussed, and lead to the difficulty of cutting layers of tow, which frequently breaks blades and causes cut-leng..

Airflow spins yarns

Schlafhorst has developed a device for producing spun yarn by means of an air-flow acting in a twisting manner on the fibres of an untwisted sliver. The system, which has a revolving spindle, is claimed to be an improved method of forming spun yarns from staple fibres, where the yarns do not suffer any loss of strength.

Demands on dentists’ overalls: Between protection and comfort (German) (Zwischen Schutzwirkung und Tragekomfort)

The demands relating to hygiene clothing are reviewed, the garments in question being overalls worn by dentists. The garments have to reduce the risk of infection by providing better resistance to bacteria whilst making the wearer feel comfortable at the same time. Whilst a close fit is seen as a positive factor, fabric stiffness, hardnes..