Retained Strength of Air-Spliced Yarn -- Rupture Process and Effect of Test Length.

Researchers analyzed the tensile failure process of air spliced yarns manufactured from carded cotton, combed cotton, polyester/cotton, cotton/acrylic, and acrylic hosiery yarns by repeated cutting and splicing. The stick slip rupture of cotton, acrylic, and polyester/cotton blend yarns occurred in the spliced zone rather than the normal ..

The Hairiness Features of New Yarns.

Researchers determined the nature of the hairiness of a 100 percent cotton Rieter Com4 spun yarn and a 65/35 polyester/cotton blend Murata roll jet spun yarn and evaluated the effects of testing speed on yarn hairiness. A projection microscope connected to a CCD camera and Video Pro32 color image analysis system measured yarn hair length...

Effects of Assembly and Twisting Nozzle Pressures on the Properties of Two-Ply Air-Jet Spun Yarns.

A study determined the influence of such parameters as assembly and twisting nozzle pressures, yarn count, and material type on the properties of two ply air jet spun yarns manufactured using a spin assembly winding machine on the PLYfiL system. Changes in nozzle pressure affected the tenacity, irregularity, and hairiness of untwisted and..

Quality Aspects of Viscose Jet-Spun Plied Yarns.

Examination of the ply twist and twist direction on the properties of viscose jet spun yarns demonstrated that plying improved tenacity, breaking extension, and eveness. The degree of improvement depended upon feed ratio, second jet pressure, and level and direction of ply twist. Z twist yarns were more rigid than S twist yarns, and their..

Effect of Process Variables on Textured Yarn Instability.

Researchers examined the individual and combined effects of overfeed, air pressure, and texturing speed on the stability of air jet textured yarns. Experiments with air jet textured yarns prepared from 70 denier/72 polyester filament yarn showed that increases in overfeed and texturing speed increased yarn instability. Increases in air pr..

Relationship between Seed Coat Fragment Content and Yarn Strength Depending on the Range of Fiber Quality.

An experiment investigating the hypothesis that the presence of seed coat fragments predisposes cotton yarn to additional weak areas analyzed the fiber properties, yarn properties, and Trashcam data generated by 105 spinning tests of 20 tex yarns. The weak areas appearing when seed coat fragments were present were more problematic because..

Universal Yarn Convering Machine for Novel Knitting Yarns.

Hamel, which designed and manufactured the Elasto Twister LE yarn covering machine, is collaborating with Santoni, a manufacturer of full fashioned circular knitting machines. The Elasto Twister LE achieves 18,000 rpm for 1 kilogram spindles with a maximum delivery speed of 80 meters per minute, as well as a 45 percent reduction in energy..

Production of Elastane Composite Yarns as an Integrated Process in Texturing Machines.

Barmag manufactures texturing machines for double density, multiple, thick, thin, linen-like, two tone, conjugate, pore interlaced, variable shrinkage, and interlaced elastane bicomponent yarns. Its FK 6-1000 texturing machine manufactures bicomponent yarns with elastane core yarns and S/Z plied draw textured sheath yarns. Resultant yarns..

Fluid Simulation of the Airflow in Interlacing Nozzles.

A computer simulated the air flowing through interlacing nozzles to better understand air flow behavior and calculate the interlacing degree and loop frequency under various conditions while processing fine denier yarn. A decrease in cross sectional area of the inlet hole of the nozzle or an increase in inlet air pressure improved the int..

Package Dyeing Machine.

Gaston County Dyeing Machine Company's ML200 yarn package dyeing machines permit programming of dye cycles to simulate machine operation in a laboratory setting. Yarn package weights range from 200-300 grams, and package waste is minimized. Advantages of the ML200 include accurate dyeing, excellent correlation between laboratory and plant..