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2. In the Knitting Mill

Chenille can be processed on warp knitting machines, weft Raschel machines, flat bed, and circular knit machines without any difficulties. The type of machine used will depend on the cloth characteristics desired and the purpose of the finished product.

Warp Knitting Machine

As with other yarns, uniform winding tension is necessary when warp beams are made. In order to avoid excessive strain on the chenille during the warping process, the thread should be supported by guiding devices that move together with the yarn. If this is not possible, then the diverting points-in the creel, for example-should be designed as guides with a larger radius. As is sometimes done with other fancy yarns, the guide bars for the chenille should be designed as guiding tubes. A relatively high tension is necessary for producing flawless quality goods; because of this, normal eyes lead to pile displacement in the chenille. Feed tension should be controlled in such a way that during the looping process the needle does not exert too much friction on the yarn. This causes displacement of the pile, which can lead to bare spots between the wales. Since the maximum thread tension is dependent on the guiding, it cannot be given as a fixed value, but must be determined by suitable tests.

Weft Raschel Machine

Processing chenille on a weft Raschel entails fewer problems than on a warp knitting machine, although inexpert weft insertion can also lead to undesirable effects on the quality of the goods. Flat Bed Knit Machines Knitting should be achieved by using two packages. Knot detectors should be in place to prevent needle damage. Feed from Cross-Wound Packages The recommendations for using cross-wound packages in the weaving mill (see Section 1 above) can be followed here, if the knitting machine works from several cross-wound packages at once or one after the other. Working alternately from various cross-wound packages creates favorable conditions for excellent appearance of the final goods. Wax All chenille yarns that are to be knitted should be specified to have a knit wax applied. If for various reasons the yarn cannot be knitted within 30 days, it should be rewaxed, and to avoid direction problems it has to be rewound twice.

Direction of movement of Chenille Yarns

As with woven fabric, pile direction must be strictly maintained (see above). Changes in Lot-Numbers When changing lot numbers, different lots must be kept absolutely separate.

This information is designed as a basic technical guideline for converting chenille yarn in knitting mills. Further information can be obtained by contacting CIMA.

For further technical questions, please e-mail or fax to CIMA's office in Lugano, Switzerland:

CIMA - Chenille International Manufacturers Association
Corso Elvezia 16 C.P. 4511 CH-6904 Lugano (Switzerland)
Tel/Fax: 011 41 91 921 09 91 - - E-mail: cima_intl@hotmail.com

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