HAIRINESS OF COTTON-SPUN YARNS--EFFECT OF FIBER PROPERTIES ON MEASUREMENTS MADE WITH THE ZWEIGLE G565 HAIRINESS METER.

Experiments with the Shirley Hairiness Meter revealed that fiber parameters explained less than 50 percent of the effect of yarn hairiness in ring and rotor-spun yarns, and that length and uniformity effected hairiness most. A test using the German Zweigle G565 Hairiness Meter found that with ring spun yarns, linear density affected hairi..

MATHEMATICAL MODEL OF THE FIBER LAYDOWN MECHANISM WITH A SINGLE-CHANNEL HELICAL REEL AND REVERSING YARN GUIDE.

A mathematical model determines the dynamic characteristics of a high-speed yarn laydown mechanism using a helical reel and yarn guide made into a single unit with a bob. The model examined the kinematic external action on the bob from the side of the helical reel channel. The bob was shown to have definite form and dimensions. Frictional..

EFFECT OF DENIER PER FILAMENT (DPF) OF POLYESTER ON YARN STRENGTH IN OPEN END ROTOR SPINNING.

The effect of the DPF of polyester on the yarn strength of rotor spun yarns is investigated and compared to the ring spun counterparts. The strengths of both rotor and ring spun yarns increased linearly with a decrease in the DPF of polyester ; the magnitude of the change was the same for both spinning systems. The strengths and elongatio..

COMPUTER AIDED WORKSTATION FOR CONTROLLING QUALITY.

Computerized yarn testing has resulted in considerable savings in labor costs and more precise evaluations. 3 refs.

COMPUTER-AIDED EVALUATION OF TENSILE TESTS OF YARNS.

An examination of the comprehensive tensile tests of yarns focuses on the parameters that would yield a better characterization of tensile properties. The use of a computer to obtain these parameters is discussed. 4refs.

EQUIPMENT FOR IMMEDIATE CONTROL OF YARN EVENNESS AT THE AUTOMATIC WINDER AUTOSUK.

Equipment for monitoring the thickness of yarns can be used to help control the quality of yarns.

EFFECT OF LENGTH OF A COMPLEX YARN ON ITS MECHANISM OF FAILURE IN EXTENSION.

In complex yarns, filaments do not break simultaneously when the maximum breaking load is achieved, so the failure process is prolonged. A load elongation curve was measured at various clamped lengths to analyze the extension process of. Terlon and Lavsan, two complex yarns with similar twist coefficients. Results showed that at a certain..

YARN HAIRINESS--NECESSITY OR SOURCE OF INTERRUPTIONS?

A review of theoretical analyses of yarn hairiness focus on the influence of the yarn structure, the type of fiber, and effects of winding and twisting.

ALTERING YARN PROPERTIES BY AIR MINGLING.

The illusion that air mingling improves the processing properties of yarn without altering any other yarn properties is dispelled. Various steel and ceramic air mingling nozzles are discussed. The yarn properties of PES 50 dtex f34, PES 167 dtex x2, and combination elastane 80 dtex + PA 44 dtex manufactured with 3 different size nozzles a..

RIETER-SCRAGG--JETEX HIGH PERFORMANCE AIR TEXTURING.

The Rieter-Scragg 1200 air texturing machine reduces the cost of air texturing by using an effective feed roll to jet geometry, water application, ergonomic design, and a heating system that avoids yarn shrinkage.