Twisting with Elastomer

Savio Machine Tessili developed a new two-for-one twisting machine for coated and natural elastomeric yarns. Savio's Geminis two-for-one twisting machine reaches speeds of 7,000-8,000 rpm for cotton yarns and 6,000-7,000 rpm for woolen yarns. A special spindle head has a reduced slipping surface, a double eyelet unwinder, and a balancing ..

Second Generation On-Line Monitoring -- The Next Step in Automation.

To be effective, online-quality monitoring systems for yarn manufacture must include such features as the ability to monitor a range of parameters with multiple sensors, flexible hardware and software design, integration with existing machine control syst

Textile Fibres in Warp Knitting (1).

The criteria used to assess fiber and yarn quality inlcude fiber length, cross section, surface structure, fiber or yarn fineness, fiber density, and yarn uniformity. Fiber length determines yarn smoothness and hairiness. Fiber cross section and surface structure determine yarn processability. Both Nm (weight related metric count) and dte..

Experimental investigation into loop forming (loss of stability) by turning of threads

An experimental study of the stress-strain state of threads at twisting, both on the steady straining stage and on the unsteady straining stage (a loop formation), is presented. As objects of study monofilament threads, complex threads, and yarn were used. The experimental installation allows for measuring the dependence of torque on the ..

Effect of Cross Section of Spandex Yarn on Air Drag.

Reseachers investigated the effect of yarn cross section on the air drag coefficient and characteristics length of spandex yarns. Results from axisymmetric air flow analysis showed that, due to the irregularities of the yarn cross section, the air drag coefficient of the spandex yarn was similar to the effect of a flat plate. The drag coe..

Thin-film coatings for yarn-guiding textile machine components

The potential for thin-film coatings in the textile industry is discussed. The technology, which is used in the field o machine tool manufacture, permits the deposition of hard-facing layers with a thickness of only a few microns. Following a description o the process, the advantages of thin-film coatings are reivewed and potential fields..

100％ cotton hollow yarn utilizing Kuralon K-II

Japanese companies, Kurabo and Kuraray, have developed Spinair hollow yarns uing Kuraray's Kuralon K-II fibres as the core and cotton for the sheath. The yarns are lightweight, bulky, soft, absorbent, quick drying and heat retaining.

Spinning of POY microfiber yarns with a new self suction cooling device

Akzo Nobel Faster AG, Germany, have developed a new process for the spinning of fine filament POY yarns. The process, which is covered by patents, utilises a self suction device to cool the filaments after melt extrusion. Details are provided of work carried out on a multiple position pilot unit to assess its potential for spinning filame..

Frictional tangling strength of interlaced yarns (Japanese)

In order to discover the frictional tangling strength of interlaced yarns, they were subjected to iterative frictional forces by reciprocating rubbers and the number of tangles was measured. The frictional tangling strength is defined as the ratio of the

Dyneema reinforced cotton yarns for strong flame-resistant fabrics (German) (Dyneema-verstarkte Baumwollgarne fur feste gewebe mit Flammschutzimpragnierung)

Flame resistant cotton fabrics are very much in demand. Improving fire resistant properties is straightforward because of the availability of durable flame resistant finishes but often when a cotton fabric is coated it loses up to 50％ of its strength. Dyeneema is a high performance polyethylene fibre (HPPE) and is among the strongest fib..