EFFECT OF MOSITURE (WATER) IN THE THERMOBONDING PROCESS OF POLYPROPYLENE AND COPOLYESTER FIBERS.

A fiber-loop test method was developed to evaluate the thermobonding performance of two different grades of polypropylene fiber and one grade of copolyester fiber with varying water content. A flexible themomechanical analyzer was used in this method. The fibers contained water because they were first immersed in water and then exposed to..

METHOD OF DETERMINING OPTIMUM LOOM SPEED RELATIVE TO WEFT BREAK FREQUENCY

The maximum rate of weft insertion that is possible without casuing adverse effects on weft break frequency was determined. Weft break probability at various insertion speeds was computed using Gaussian distribution laws for both yarn tear strength and loading, as well as Gaussian distribution laws for yarn tear strength and exponential d..

ITS AIR JET LOOM TABLE

The design and characteristics of air jet looms produced by ten manufacturers are tabulated. Air jet looms made by Guenne Webmaschinenfabric, Invest/Zbojovka Vsetin, Ishikawa Keisakusho, Lindauer Dornier, Nissan Motor Company, Picanol, Somet, Sulzer, Toyoda Automaic Loom Works, and Tsudakoma are listed. The table includes data for weft in..

EFFECT OF YARN ELASTICITY ON AN UNWINDING BALLOON

In developing the theory of balloon formation in over-end unwinding of yarn from cylindrical packages, the simplifying assumption that the yarn is inextensible has been used. In this study, the effect of yarn elasticity on an unwinding balloon was examined. Balloon equations for a linear elastic yarn were derived. Numerical solutions to t..

V-TYPE HIGH-PERFORMANCE WARPING CREEL

West Point Foundry's Model 844 Warping Creel has a V-type design with two creel wings. It is equipped with yarn stop motions and clamping devices. Empty yarn packages are exchanged for full yarn packages by a roller chain-driven mechanism. Each creel is eqiupped with blower fans to remove accumulations of fly and dust and a semi-automatic..

SPUN POLYESTER -- PRINCE OF THERDS.

Over the pasl 25 years, spun polyester has almost completely replaced natural fibers, particularly mercerized cotton, in sewing thread. The cost and performance of spun polyester sewing thread during sewing and in the seam during wear are evaluated. Its most important sewing properties are high strength and modulus, uniform frictional pro..

COTTON BLEND WARP YARNS FOR DURABLE FABRICS

Du Pont's cotton blend warp yarns for durable fabrics are comprised of 35-90 percent by weight of cotton, 10-15 percent by weight of organic polymer, and up to 55 percent by weight of another fiber. This blend is spun conventionally, wetted in an aqueous bath, and dried under tension. The blend yarn is described in United States patent 5 ..

DRAW-TEXTURING MACHINE WITH AUTOMATIC POSITIONAL DOFFING.

Barmag's AFK draw-texturing machine features automatic positional doffing. Each crimping position is monitored by a Unitens quality sensor. The system tracks yarn packages all the way to the packaging station with the help of a master control system and coded trnasport frames. The AFK can operate at speeds of up to 1,200 meters per minute..

MICROFILAMENT FALSE-TWIST TEXTURING

Optimization of microfilament false-twist texturing is complex because the physical properties of microfilament yarns are significantly different from those of conventional yarns. Modifications of the texturing machines are requisite. Important machine criteris are a cross-section with few deflections to minimize damage, low-friction surf..

NEW HANK YARN DRYING SYSTEM HAS CUT COSTS.

Tomkinsons Carpets of Kidderminster, the United Kingdom, recently invested 70,000 British pounds in dehumidification process dryers. This enabled Tomkinsons Carpets to reduce its energy costs by 61 percent. Tomkinsons Carpets, founded in 1869, is one of the United Kingdom's leading producers of Axminster, Wiliton, and tufted carpets. Tomk..