Measurement of tensile strength on running yarns [in knitting] (German)

Results indicate that dynamic testing does not supply the same amount of information as a static tensile test, but that it is a fast way of obtaining reliable information on the mechanical properties of yarns. It is shown that the dynamic tensile strength can be calculated from the results of a static tensile test. The dynamic tensile tes..

Bending properties of multiaxial warp knitted fabrics

An examination of the bending properties of multiaxial warp-knitted fabrics is reported. A wide range of bending hysteresis curves was obtained on the Kawabata Pure Bending Tester (KES-FB-2). These curves showed high levels of non-linearity and non-symmetry, compared with those for plain weaves.

Structural change of regenerated cellulose fibers caused by water (Japanese)

This paper investigates the structural change of regenerated cellulose fibers caused by water using a small angle X-ray, specific volume and thermally stimulated depolarized current (TSDC) analyses. From the small angle X-ray measurement of Cupro fiber wi

Textile testing and total quality assurance

Textile testing holds an important position in the textile industry. It is a valuable tool in the hands of the textile manufacturer and research scientist. It involves the inspection and testing of textiles throughout the manufacturing process to find; an

A study of the effect of module averaging on knitting-yarn manufacturers

The Agricultural Marketing Service (AMS) of the US Department of Agriculture (USDA) is proposing a new cotton classification methodology called module averaging as an improvement to the existing system. AMS asserts that the module-averaging approach will increase the precision of fiber quality measurements. AMS also asserts that, owing to..

Predicting hairiness for ring and rotor spun yarns and analyzing the impact of fiber properties

Models for predicting ring or rotor yarn hairiness are built using a back-propagation neural network algorithm. These models are based on fiber property input measured by three different systems, HVI, AFIS, and FMT. We compare the prediction results from the different models, which reveal that yarn hairiness measurements from HVI data are..

High-speed melt spinning of sheath-core bicomponent polyester fibers: high and low molecular weight poly (ethylene terephthalate) systems

Sheath-core bicomponent spinning of high molecular weight poly(ethylene terephthalate) (HMPET, IV = 1.02 dl/g) and low molecular weight PET (LMPET, IV = 0.65 dl/g) was done at a take-up velocity range of 1 to 7 km/min. The structures of the individual com

Analysis of yarn tension in the yarn-forming zone in friction spinning

The tension distribution along the yarn tail in the yarn-forming zone of a friction spinning machine was analysed by considering the effective parameters of the torque applied to the yarn tail. Tension is applied to the yarn tail by suction air pressure a

Worldwide manufactured fiber capacity survey: 1993 to 1998

Synthetic and cellulosic fibre capacity by fibre type and by coountry are analysed. In particular the growth of the share of Asian countries is charted.

World wide manufactured fiber survey: 1992 to 1998

The figures for global demand and production of manufactured fibres between 1992 and 1998 are given in table form. Separate data are shown for synthetic, cellulosic, olefin and glass fibre production by country, synthetic and cellulosic fibre production by fibre type and acetate filter tow production by region.