The Importance of Backrest.

An effective backrest in weaving ensures an efficient sensing and tension regulating mechanism, and backrest position has a direct effect on low stress mechanical properties. An overview of backrest performance in recently developed letoff mechanisms reveals that the ideal positive letoff features the maintenance of a constant length betw..

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Measures for Reducing Clinging Tendency in Weaving.

Increased air jet weaving speeds have accentuated problems due to warp end clinging. Clinging causes warp induced pick stoppages, which reduce loom efficiency and increase the incidence of stop faults. A research project examined the properties that influence clinging and the effects of yarn type, sizing agent, and loom settings on clingi..

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Analysis of Beat-Up Force during Weaving.

Researchers evaluated the beatup force on the Muller CKM 1/20 needle loom using a load washer, strain gages, and tension meters. The investigation evaluated the influence of warp tension, pick spacing, linear density of the filling yarn, and shed timing on the beatup force. A piezoelectric load washer installed on the loom connected to a ..

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Shuttleless Air-Jet Looms Lead Weaving Innovations.

Shuttleless weaving has brought new life to the fabric forming industry since 1945. Sulzer Brothers created the first commercially sucessful shuttleless loom in 1950. The Czechoslovakians invented water jet and air jet shuttleless weaving systems in the 1950s. Springs Mills and Cone Mills purchased air jet looms on a large scale in the la..

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Automated Setting of Backrest and Drop-Wires in Mill Trial.

Small lot sizes require frequent style changes and loom adjustments. Researchers propose a method to automatically set the backrest and drop wire array. A computerized system controls the positioning process. The program permits automatic customization of shed positions to specific configurations. A field trial of the automated setting sy..

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Analysis of Fabric Deformation in a Roll-Making Operation. Part IV: Effect of Varying Winding Tension

Researchers investigated the influence of variable input tension on the stress state inside a fabric roll. A nonlinear function described the load deformation behavior of the fabric under compression. A proposed numerical method solved nonlinear integral equations to find stress terms. The investigation described fibe winding tension func..

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Draw-Warping-Characteristics and Variant.

The major objectives of draw warping for warp knitting and weaving are increases in warp beam quality and operational efficiency. The most important yarns processed on draw warping units are nylon and polyester yarns with average yarn counts of 44, 50, and 76 dtex. Both offline and online systems are available for draw warping. An alterna..

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ITMA 95: Narrow Fabrics

At ITMA 1995, machinery and equipment manufacturers representing the narrow fabric sector, including woven, knit, and braided narrow fabrics, presented no major technological developments. The major focus of these companies was to ensure that machine design and operations were in compliance with European Union safety standards for operato..

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Comparative study of pilling testing

A report is presented of comparative pilling tests on 52 woven and knitted fabrics for use in dresses, men's and ladies' suits, trousers, coats, overalls, jumpers, shirts and sheets made from different blends, with polyester/wool and polyester/viscose rayon blends predominating. In the selection of the samples the condition was imposed th..

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Reinforced fabric

A reinforced fabric comprises a background fabric and a reinforcing grid of yarns which is joined to at least one face of the background fabric. The resulting reinforced fabric is at least 20％ stronger, as measured by Elmendorf Tear Strength, than a similar fabric in which the reinforcing yarns are integrally woven into the background fa..

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