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  • 12.06.2009

USTER® STATISTICS 2007 Version 2.0 – considerably extended with a new version of Sliver Statistics and Statistics for Cellulosic Yarns

This year sees a new edition of the world-famous USTER® STATISTICS quality benchmarking data for textile fibers and yarns – with new statistical graphs for slivers and for yarns made out of man-made cellulosic fibers. Uster Technologies is to issue an update of the 2007 edition in the form of an interactive CD as well as a web-based version on

With the current edition, we are presenting new statistical information on the quality of autoleveled drawframes. The USTER® STATISTICS for slivers contain various quality data for the mass evenness of slivers. They were established by collecting quality data online on the finisher drawframe with the USTER® SLIVERGUARD in the spinning preparation of short-staple spinning mills. With the short-term leveling, it is now possible to produce sliver with excellent evenness values. Due to the fact that the leveling has been continuously improved over the years, it was possible to increase the drawframe speed to over 1000 m/min. This technical progress is also reflected in the USTER® STATISTICS, which indicate a marked improvement in sliver evenness between 1989 and 2009. However, the improvement of the mass variation measured directly at the drawframe cannot only be attributed to the short-term leveling but is of course also a result of the continuous improvement of material handling in the spinning mill as well as improved drawframe technology.

The growth seen in man-made cellulose fibers in recent years is particularly impressive. Production of these fibers grew by 9% from 2005 to 2007, which can be attributed primarily to the increase in staple fibers. This fact has prompted Uster Technologies to establish also statistical data for cellulosic yarns. We have come to realise in recent years that the chapters of the USTER® STATISTICS for man-made cellulosic fibers have to be radically revised in view of our focus to continuously adjust the USTER® STATISTICS to the requirements of the textile industry. This conclusion can be attributed to the rapid developments made in the man-made cellulose production on the one hand, and to the diversification of cellulose fibers in various products with different characteristics on the other hand. The revised chapter of the statistics for cellulosic yarns contains various cellulosic based raw materials like e.g. Viscose, Modal, Lyocell, MicroModal and their blends with cotton and polyester spun with different spinning systems from ring spinning, OE spinning to airjet spinning. 

USTER® STATISTICS are today acknowledged throughout the global textile industry as THE essential tool for comparing key parameters along the entire yarn production chain, from raw fiber through sliver and roving to the final yarn, and Uster Technologies is delighted to be able to present the new edition at ShanghaiTex 2009 – the first time on a CD with interactive features which allow the user to get quick access to all material and parameters and to set and compare individual values.

Ongoing developments by Uster Technologies have seen several innovations in the range of instruments and sensors for spinning mills, widening still further the range of quality characteristics covered, and these new possibilities are reflected by benchmarking figures in USTER® STATISTICS, as follows:

Quality characteristics for cotton fibers 

Changes in fiber properties within the entire spinning process

Quality characteristics of slivers, rovings and yarns

Quality characteristics of man-made cellulose yarns

Relationships between fiber and yarn characteristics

Today, USTER® STATISTICS provide benchmarks for seven laboratory systems, they are recognized more than ever as an indispensable tool for spinners, weavers, knitters, managers, technologists, retailers, teachers and traders along the entire textile chain.