Drape prediction by means of finite-element analysis

This approach successfully forecasts the draping propensity of a fabric treated as a shell membrane with orthotropic properties.

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Testing textiles by image processing techniques

Research is being carried out at TU Chemnitz into the determination of textile properties using image analysis. The set-up and operation of a laboratory test rig are described. Diffraction images of woven and knitted fabrics showing structural defects are reproduced. The computer software which has been developed is mentioned. The test ri..

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A new way to measure fabric handle

A consumer-based market research technique used to discover what people expect from certain farics for certain applications is described. A profile of consumer requirements/expectations is produced by the group defining a series of polar word pairs and indicating where on a scale between the two poles the ideal would be for each word pair..

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Measuring friction of fabrics

Centexbel has devised a system for assessing the friction between two fabrics using a conventional dynamometer with a special clamp mount on the cross-head. The crosshead is lowered to bring the two samples together.

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A finite element analysis of the draping of fabrics

Investigations have shown that non-linear finite element analysis (FEM) can be applied successfully to study fabric/drape. An effective way of removing one of the obstacles in the way of modelling by FEM (representing the mechanical properties) is to use shell element and membrane elements to model the fabric and to modify the stress stat..

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Useful techniques in textile microscopy

Microscopy is a useful technique for analysing structural characteristics of textile materials. Procedures to prepare these materials (fibres, yarns, fabrics) for microscopic examination are discussed, with reference to cross-sectioning techniques, longitudinal techniques and surface analysis.

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Denim trends revealed

A survey of the consumption of denim garments in five west European countries is presented. Eight-thousand people and one-hundred-and-sixty shops were surveyed in Holland, Germany, Switzerland, italy and France. The proportion of people wearing denim and the average price of a pair of jeans in pounds are given for each country along with ..

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A new method of impregnating textiles

The Super-Sat system for use in single-stage preparation ranges for impregnating cotton and cotton blend fabrics, thoroughly penetrating them, is described. The metering system which acheives the best results with Super-Sat is the Polykomat chemical metering system, making sure the right amount of chemicals are fed to the fabric. Super-Sa..

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Grob: new Jumbo let-off system

This new let-off system allows up to a 1500mm warp beam flange, and so is compatible with the giant batching units now in use. The increased capacity means fewer warp changes and more efficient production. A calculation of how long it would take to recover investment costs manufacturing denim cloth predicts investment would be fully recou..

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Effect of yarn deflections on loom downtimes

Double yarns not detected during warp tying-in adversely affect the running behaviour of the loom. The frequency of yarn breaks caused by deflected warp yarns has been analysed in a series of practical trials. The uster Topmatic PC tying-in machine is equipped with a double-yarn detector.

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