POSSIBLE APPLICATIONS FOR UNCONVENTIONALLY PRODUCED STAPLE FIBER YARNS FOR KNITGOODS

The development of open end rotor spinning, open end friction spinning, fiber cover spinning, and filament cover spinning has led to attempts to use the types of staple yarns produced on these systems in the construction of knit fabrics. The properties of yarns used to construct knit fabrics, including yarn count, twist, strength, uniform..

ANALYSIS OF QUALIITY IN THE YARN FINISHING AND TEXTILE MANUFACTURING PROCESS.

The structure and properties of raw, gassed, and merverized cotton ply yarns were investigated. The test results indicated the influences of gassing and mercerizing on such properties as uniformity, hairlness, stress-strain behavior, elasticity, flexural strength, and loop strength. Mercerization resulted in fundamental structural changes..

CONNECTION BETWEEN THE MECHANICAL PROPERTIES OF HIGH-MODULUS YARNS AND THEIR EFFECTIVE CROSS SECTION

The effects of the cross-sectional uniformity of the elementary filaments of high-modulus, high-strength yarns on their mechanical properties, particularly stiffness and strength, were examined. Terion yarns with varying linear denstities and number of elementary filaments were tested. The cross section was almost circular, which minimize..

AUTOMATED PACKAGE TRANSPORT IN THE TEXTURING PLANT

Barmag has developed components for the automated handling of yarn packages in crimping plants. The Barmag equipment includes automatic guided vehicles, automatic doffers, creel transport vehicles, and computerized control systems and quality monitoring equipment for textured yarn packages. The use of this machinery improves package quali..

ANALYSIS OF THE SURFACE STRUCTURE OF LOOP FANCY YARNS.

Fancy yarns are composed of several threads that are twisted together at different delivery speeds. The components of fancy yarns include core thread, effect thread, and fixing thread. Conventional fancy yarns are produced on a ring twisting system. Fancy yarns can also be produced on a so-called combined system, which combines the hollow..

SOME PROPERTIES OF YARNS PRODUCED BY THE AIR TEXTURING PROCESS.

Air textured yarns are gaining popularity because they resemble conventional spun yarns. The properties of air textured yarns produced from nylon, polyester, viscose, and their blends were examined. A modified Du Pont XIV type air jet was used. All of the yarns, except for the viscose yarns, were heat-set prior to tensting. Yarn propertie..

AIR TEXTURING JET HEMAJET EO-52 FOR HIGH BULK YARNS.

Heberlien's air texturing jet EO-52 was designed specigned specifically for the production of high bulk yarns. The EO-52 features excellent reproducibility from jet position to position without readjustment, increased production speed, low energy consumption, simple maintenance, and high production reliability. It is used for processing y..

HIGH-TEMPERATURE HEATER FOR FALSE TWIST TEXTURING.

Experiments using a high-temperature heater have demonstrated that the duration of heating during false twist crimping can be shortened considerably. The temperature of the heater should not be allowed to exceed 7000 degrees Centigrade because undesirable temperature differences between the surface and core of the heated yarn will occur a..

WRAP YARN PRODUCTION AND PROPERTIES.

Cover spun yarns are made by wrapping untwisted staple fibers with an end of continuous manmade filament. An experimental apparatus consisting of a hollow spindle, a take-up unit, and a spindle drive was used to produce wrapped yarns composed of a cotton staple and a polyeste wrap. The tensile, bending, shear, surface, compression, thickn..

VARIATION IN HARIINESS OF WORSTED YARNS.

Any force that inhibits the rotation of the balloon causes an increase in the height of spinning triangle, which results in greater yarn hairiness. Air resistance to rotation and friction against the retaining ring are important examples of these forces. Both are critical in the development of hairiness during the production of a cop. Ten..