Rieter

Advantages of condensing

Index

First of all, the strength and elongation of the yarns are clearly improved. In addition, variations in strength and elongation values are reduced, resulting in considerably smaller numbers of weak places in the yarn.

Furthermore, the condensing process enables yarn hairiness to be reduced quite dramatically, especially of hairs longer than 2 mm (Fig. 75), i.e. those hairs which cause the main problems in downstream processing.
The condensing process also enables the abrasion resistance of the yarns to be improved. This not only results in much better yarn abrasion test values, but also considerably reduces deterioration in yarn quality during winding. All these quality advantages can be exploited by spinning mill operators. In most cases even yarn twist can be reduced, resulting in higher delivery speeds on the spinning machine. The excellent properties of compact spinning yarns (the brand name for yarns produced on the ComforSpin system is  Com4® yarn) are, of course, also of advantage in downstream processing, as described below.

The lower hairiness and improved yarn abrasion resistance reduce the production of fly in weaving and knitting (Fig. 76 shows the situation in knitting), which in turn reduces the number of fabric defects and increases machine efficiency.

Lower hairiness and improved yarn abrasion resistance also enable the degree of sizing in weaving to be reduced by up to 50% (Fig. 77). This not only results in economies in weaving, but also to a considerably improvement in the ecological situation.

The improved properties of compact yarns are apparent right through to the fabric. As can be seen from Fig. 78 and Fig. 79 the mechanical fabric properties, i.e. fabric strength, abrasion resistance and pilling behavior, are clearly improved.

The better yarn structure can even be detected in the fabrics (Fig. 80). This results in more attractive luster of the fabrics and a softer hand. With compact yarn, the fabric hand can be made even softer by using a lower yarn twist level. With all these advantages, compact spinning has set a new standard, which is bringing positive changes in all stages of textile manufacturing, from spinning right up to the end product.

Based on the success of the ComforSpin system, other machinery manufacturers (Fig. 81, Suessen, Zinser, Toyota ...) have developed their own compacting systems, also applying the aerodynamic principle.
Compact spinning is therefore much more than a niche system. Compact spinning is very successful for spinning high quality yarns for a wide range of applications.

Fig. 75 – Hairiness S3 is decisive in downstream processing

Fig. 76 – Com4® in knitting – lower fiber fly and fewer foreign fibers

Fig. 77 – Higher efficiency despite applying less size

Fig. 78 – Fabric strength (warp) 09

Fig. 79 – Lower abrasion in the Staff test

Fig. 80 – Result in the fabric

Fig. 81 – ELITE system by Suessen