Damage Effect of Sudden Radial Strain on E-Glass Filament Yarns.

A critical loss in breaking resistance in glass and carbon fibers can result from friction spinning, air jet texturing, braiding, or knitting, giving rise to flexing and torsional strains. This loss can be attributed to filament breakage, which can lower productivity, affect the health of workers, and cause electrical short circuits. A st..

Properties of Yarn Made from Broken Cotton Fiber

Researchers assessed the feasibility of a statistic, the quality factor, proposed to describe fiber damage more accurately. The study assessed a relatively small quantity of four cottons. Comparisons of normally carded yarns and combed recarded yarns dete

The Simulation of the Geometry of Two-Component Yarns. Part I: The Mechanics of Strand Compression: Simulating Yarn Cross-Section Shape

A study developed a method and predictive equations for modeling the compressed shape of strands in bicomponent yarns. Principal assumptions for the geometry of cross sections and the mechanics of strand behavior in compressing and bending include: a circ

Predicting Yarn Quality Using measurements at Alternative Stages of the Spinning Process.

An experiment to determine the predictive potential of measurements taken at alternative stages of fiber processing assessed the commercially available fiber property measurements of extra long staple cottons, beginning with the ginned fibers and repeatin

Yarn Strength is Affected by Frictional Properties.

To determine the effect of friction on yarn strength, researchers fitted a Lawson-Hemphill CTT yarn tester with a friction element to provide a value of the force required to break the yarn with or without a frictional load. Because of the drag induced on a yarn as it touches machine components in processing or testing, a yarn will break ..

Elastomeric Yarns

During manufacture, manmade fibers made from nylon, polyester, and polyurethane become stretched beyond their normal elastic limits, which improves the strength of the fibers but increases rigidity and decreases extensibility. However, by omitting high st

Effect of Shore hardness of Cots on Yarn Quality.

Many Indian yarn manufacturers began switching to softer cots during the early 1990s to reduce yarn imperfections and yarn faults. However, the change significantly reduced average cot life. A survey by SITRA in 1991 found that average cot life was 3.2 ye

Rootcauses [sic] of Spun Yarn Irregularity.

Faults in spun yarns are caused by properties of the raw materials used, inherent errors in the manufacturing process, defective manchinery, mill conditions, and problems due to the push for higher profits. Such fiber properties as degree of crimp, fiber cross sectional shape, fiber maturity, and frictional and elastic properties contribu..

Quality Yarn through Proper Selection of Machine and Technology -- A Case Study.

Researchers analyzed the performance of mills to determine the role of machines, technology usage, and innovative leadership in plant productivity and quality control. One mill replaced its old Platts carding machines with new MK5 carding machines. The ne

New Low-Emission Biodegradable Spin Finishes, Coning Oils and Lubricants.

Research developed a new class of carbonic acid polyester auxiliaries that offers integrated environmental protection. These new spin finishes, coning oils, and lubricants combine biologically degradable, low molecular weight polyadducts. Tallopol 7496 offers excellent frictional, spray, and abrasion properties, as well as excellent surfa..