Methods of Investigation of Blended Yarn's Inner Structure.

Knowledge concerning the inner structure of blended yarns is necessary to predict yarn behavior during processing. Researchers developed a method for examining blended yarns that is based on cross section and radial analysis and that takes into account yarn unevenness, arrangement of fibers in yarn, yarn packing density, and yarn blending..

Yarn Fineness, Diameter, and Twist.

Models for relating yarn fineness, twist, and diameter are either imprecise (Kochlin theory) or difficult to apply at the mill level (the physical theory of Hearle, Treloar, and Neckar). Researchers developed a mathematical model for describing the relationship between yarn fineness, twist, and diameter that accounts for the relationship ..

ITMA 1991 -- DYEING

Major trends in dyeing machinery exhibited at the 1991 ITMA were environmental safety, flexibility for small lots, and extensive automation. Yarn dyeing machines are reviewed. Loris Bellini's APPC-LV universal hank dyeing machine, Fong's CCS-84-4 HT package dyeing machine, Master's AM-FR 7 dyeing machine for yarn cones, Minox's RPPO HT dy..

DRAFTING AND EVENNESS OF WOOL YARNS PRODUCED ON THE PLYFIL, SIROSPUN, AND TWO-FOLD SYSTEMS.

A mass of 32 kilograms of top (20.9 microns, 61 millimeter Hauteur) was recombed and processed through to a 5.5-ktex sliver. The wool was split into three lots and processed on each of the three systems. Yarn evenness was measured with the Yarn Fault Analyzer. The reversed Sirospun yarn had a similar evenness to that of the PLYfil yarn, w..

TWIST AND LINEAR DENSITY COEFFICIENT OF VARIATION-LENGTH CURVES OF POLYESTER/COTTON YARNS SPUN BY DIFFERENT PROCESSES.

The coefficients of variation-length curves for yarn twist and linear density were measured as a function of blend proportion, yarn twist, and yarn linear density for polyester/cotton yarns spun by ring, rotor, and friction spinning. The effect of each of these parameters on twist and linear density irregularity was described for each typ..

YARN FOR AUTOMATIVE TEXTILES

Cartex HL yarns were developed for use in the manufacture of such automotive fabrics as seat covers. These yarns are notable for their resistance to ultraviolet light and heat. Both pile and flat woven fabrics can be manufactured from Cartex HL. Worsted system processing is used to produce these yarns, which are top-dyed for precise color..

FRICTIONAL PROPERTIES OF TWISTED POLYAMIDE TEXTILE YARN.

The dependence of the frictional properties of nylon yarn on twist was analyzed. A power relationship with an identical exponent was found to describe this dependence. The yarn samples had a linear density of 6.7 tex, in which the twist was varied from 100 to 600 twists per minute. The coefficient of friction decreased with an increase in..

RELATIONSHIPS BETWEEN YARN HAIRINESS AND COTTON FIBER PARAMETERS

Results from three yarn hairiness testers, the Digital ITQT, the Shirley Hairiness Meter, and the Zweigle G565 confirmed the influence of fiber properties on the hairiness parameters of a series of ring and rotor spun yarns. The effect was not the same for ring spun and rotor spun yarns; yarn linear density played a role for ring spun yar..

PRACTICAL USE OF THE ZWEIGLE G 565 HAIRINESS METER--EXISTING RELATIONSHIPS BETWEEN COTTON FIBER PARAMETERS AND YARN HAIRINESS MEASUREMENTS

Two yarn parameters, total number of hairs/meter and the number of hairs/meter exceeding 3 millimeters, were related to fiber characteristics in 214 ring and rotor spun yarns using the Zweigle G 565 hairiness meter. Fiber length, variability, and the micronaire index proved to have greater implications on yarn hairiness than fiber propert..

CONTRIBUTION TO THE STUDY OF THE ATTRITION TENDENCY BY ABRASION OF COTTON SPUN

By means of the Zweigle G 555 Staff Tester, 32 cotton spun yarns of the same linear density and twist but from different fiber stocks were analyzed for attrition and weight loss through abrasion. Ratio output/input readings and percentage of weight loss were related to the fiber parameters by means of the backward and the stepwise regress..