Giesse AC 91/E, chenille yarn machine with continuous supply system (Italian) (Giesse AC 91/E, produzione di filato di ciniglia ad alimentazione continua)

A relatively recent type of yarn, chenille represents one of the most demanded products in the textile secotr, with sales figures which have grown steadily for some time now. Giesse, Calenzano (near Florence), has been operating in the chenille machinery sector for about 30 years. In 1973, Giesse built the first chenille yarn machine with..

Correlation dependence on yarn diameter (Slovak)

In this article the methods for defining the fineness, diameter and twist of a yarn are presented and the relationship between yarn fineness, yarn diameter and yarn twist is explored.

Structure of yarn and its influence on properties of fabrics (Slovak)

The geometrical relationships between fibers, their corresponding yarn and the subsequent fabrics are considered. The area is discussed with particular reference to microfibres, and to textile laminates. Gore-tex in its Laminate, Z-linear and Thermo-Dry forms is studied in particular.

The contribution of fiber friction to yarn quality

In this work, forty-seven upland cotton and corresponding rotor and ring spun yarns have been studied. The fiber friction parameters, fiber properties and yarn quality parameters have been measured and the data was analyzed statistically. It was found that there is an optimum level of friction between fibrous assembly at which good spinni..

Force of yarn Tension.

Researchers studied yarn tension parameters and forces on flatbed weft knitting machines used to process cotton. The study used yarns with varying structures to knit fabric samples and measured yarn tension forces at the top of the balloon and in the compensational zone. Samples of right-left knit fabric with three different wefting depth..

COMPARISON OF YARN TENACITY DATA OBTAINED USING THE USTER TENSORAPID, DYNAMAT II, AND SCOTT SKEIN TESTERS

Tenacity data from three different yarn testing machines were compared to show mathematically how single strand and skein tenacities differ, and how the single strand yarn tenacity is affected by the time-to-break parameter. USDA Acala cotton fibers were ring-spun into five different yarn sizes, each with five different twist factors. The..

Yarn Packing Fraction Functions II: The Determination and Correlation of Packing Fraction Function Stability with Yarn Uniformity

Evaluation of yarn packing fraction function requires diameter and linear density data streams from the same position along the yarn. Initial analysis includes graphing of the data in sequence. Data characterization begins with computation of such elementary statistics as distribution, statistical moments, and minimum and maximum values. ..

Yarn Packing Fraction Function 1: Their Importance in the Development of Improved Empirical and Theoretical Formulas Connecting Fiber-Yarn Diameter, Density, Twist, and Helix Angle

A study examined the importance of determining the packing fraction functions for various types of yarn and their role in obtaining new empirical formulae for fiber-yarn production and more comprehensive fiber-yarn computer simulation models. Researchers examined the determination of packing fraction function from real time fiber-yarn pro..

Yarn Packing Fraction Functions III: Preliminaries for the Determination from Real Time Correlated Measurements of Linear Density and Diameter

An examination of real time measurement, data acquisition, and data analysis required to determine a reasonably simple approximate packing fraction function for yarn spinning presents examples of measured fiber-yarn linear density and diameter data required for theoretical analysis and correlation studies for specific yarn types. Other me..

Prediction of Yarn Properties Using Natural Computation.

Researchers used computation techniques adapted from nature to derive data relevant to the effect of process variations and structure on yarn properties. Artificial neural networks (ANNs) determined the relationships between process settings, physical structure, and thermal and mechanical properties of polyethylene terephthalate yarns. Re..