Many fabric defects are very small and undistinguishable, which makes them very difficult to detect by only monitoring the intensity change. Faultless fabric is a repetitive and regular global texture and Fourier transform can be applied to monitor the spatial frequency spectrum of a fabric. When a defect occurs in fabric, its regular structure is changed so that the corresponding intensity at ...

Abstract The paper presents a study on woven fabrics made of helical auxetic yarns (HAYs) and their key factors Poisson’s ratio under tension. work aims to create evaluate with optimal parameters for achieving better auxeticity including weave structure, wrapping angle the yarn, thickness yarn properties warp yarn. maximum negative (NPR) fabric can be achieved as low -2.92 experiments. Then, nu...

A multi-way control system for spun yarn breakage detecting and tow stopping is presented for linen wet spinning frame upgrade in medium-sized businesses of southeastern China. The signals from periodic rotations of spun yarns are picked by piezoelectric sensors. After input protection and multiplexers, the weak voltage signal from gated channel is processed through links including voltage foll...

Although successful communication is at the heart of the clinical consultation, communication between Aboriginal patients and practitioners such as doctors, nurses and allied health professionals, continues to be problematic and is arguably the biggest barrier to the delivery of successful health care to Aboriginal people. This paper presents an overarching framework for practitioners to help t...

This paper presents thermoforming experiments and FE simulations of a commingled glass-PP woven composite on a double dome geometry, with the aim of assessing the correspondence of predicted and experimental shear angles. Large local deformations especially in-plane shear, i.e. relative rotation between the two yarn families – occur when draping a textile on a three dimensional part and eventua...

Background. Silver has been used for years in the medical field due to its antibacterial efficacy. Silver has been applied topically to fabrics as an antimicrobial agent but the process lacks efficacy because the silver percent is too low. A new yarn which can be used to weave or knit fabrics uses novel technology to extrude the silver into the yarn fibers. This process allows the silver to phy...

Various materials that are used for vascular and heart valve prostheses carry drawbacks: some require anticoagulant drugs or have moderate durability; others are not suitable for endovascular treatment. These prostheses are associated with bacterial infections. A material potentially suitable for prostheses is Dyneema Purity®, made of ultra-high-molecular-weight polyethylene. Dyneema Purity® fi...

Carbon nanotube (CNT) arrays can be drawn into a web and then twisted into threads. These CNT threads contain thousands of carbon nanotubes in their cross-section and can be further composed into yarns consisting of one or more threads. CNT yarns exhibit significant mechanical stiffness and strength and low electrical resistivity. More importantly, CNT yarns exhibit piezoresistance that could b...

For a given fiber spun to a pre-determined yarn specification, the spinning performance of the yarn usually varies from mill to mill. For this reason, it is necessary to develop an empirical model that can encompass all known processing variables that exist in different spinning mills and then to generalize this information and be able to accurately predict yarn quality for an individual mill. ...