Detection of yarn passage by air pressure variation in a pipe (Japanese)

The yarn detecting system is developed using the air pressure variation caused by a yarn running through a pipe. The optimum detecting conditions for several kinds of yarns are examined. The processing technique is also investigated to judge a yarn passing through a pipe at higher degree of accuracy. The system is composed of a yarn detec..

ILE DS-65 Evenness Tester conversion: A Digital Modernization with Revolutionary Features for Existing Testers.

Proper maintenance of manufacturing equipment is the simplest and most economical method of eliminating unwantd variations in yarn mass. Industrial Laboratory Equipment Company Incorporated's DS-65 evenness testing machine conversion system for digitally monitoring the evenness of yarn mass comprises a high speed Pentium computer, interfa..

Yarn Hairiness -- Concept, Theory, Measurement, and Evolution throughout the Industrial Textile Process. Chapter XI. On the Variability of Hairiness.

Chapter 11 of a series of articles on yarn hairiness focuses on variability in yarn hairiness testing on the B-V, Digital ITQT, and Zweigle G565 testing machines. Experiments used the B-V testing machine to measure the variability of hairiness in conventional and rotor spun cotton yarns. Statistical analysis yeilded the coefficient of var..

Acquisition of Information through Two Dimensional Optoelectronic Measurement of Yarn Diameters.

Zellweger Uster's Uster Tester 4-SX is an optoelectronic testing machine that operates online to measure yarn diameter, thick places, thin places, neps, density, hairiness, and weight and statistically analyze these data. The testing machine uses the two dimensional OM sensor, which consists of a high resolution camera and an integrated a..

Real-Time Yarn Characterization and Data Compression Using Wavelets.

Most of the data collected by real time online measurement systems are redundant and unnecessary for yarn visualization and characterization. Researchers are designing an online yarn quality measurement system that eliminates wasteful data handling by extracting, retaining, and synthesizing essential information. The system uses wavelet, ..

Quality Assurance of Elastane Multi-Component Yarns Using Object-Oriented Process Analysis.

An overview of methods for multicomponent elastane yarn quality analysis using object oriented process analysis focuses on the air jet yarn texturing process as an example. Object oriented analysis represents process and product information and their interactive relationships. Applying object oriented structuring using the object model of..

Physical Properties of Ply-Twisted Polyester/Viscose Blend Yarns.

Researchers investigated the effects of winding, doubling, and twisting on the physical properties of yarn. Experiments evaluated yarn with a high twist, yarn with a moderate twist, and polyester/viscose blend yarn. An Uster Tester 3 testing machine measured yarn hairiness. Scanning electron microscopy characterized the actual appearance ..

Tensile Elastic Behaviour of Yarns and Ply Yarns.

Researchers investigated the effects of yarn structure on the tensile elastic behavior of single and double cotton ring spun yarns, cotton rotor spun yarns, and wool ring spun yarns. The single axis tensile load test measured load and extension at break. Testing speed, particularly high speeds, affected extensibilit. Plied yarns had lower..

Production and Mechanical Properties of Fibroin-Cellulose Blended Fiber

Researchers dissolved silk fibroin from Bombyx mori silkworms and cellulose in cuprammonium solution and spun the blend into yarns. The fibroin/cellulosic blend yarn had a tenacity of 1.61 grams per denier and a static modulus of 2.24 gigapascals. These values were much lower than those of fibroin, higher than those of cellulosic fiber, b..

Sewing Threads.

An overview of sewing thread properties and manufacturing methods discusses cotton, linen, silk, and manmade fiber sewing threads; threads for embroidery, high temperature, and geotextile applications; seam and stitch types; thread construction; twist; color and color matching; finishing; scope, bulk, and mechanical properties; heat stabi..