COMPUTER AIDED ELABORATION OF TECHNIQUES DEMONSTRATED BY WAY OF TEXTURING METHODS AS AN EXAMPLE.

Textile processing methods are becoming more and more efficient due to the implementation of technological developments. The utilization of computer modeling to optimize yarn texturing is discussed.

CONSIDERATIONS FOR CERTAIN FAULTS OF WOOL YARNS.

Processes implemented by Romanian mills to ensure the quality of melana wool yarns are described.

RIGIDITY OF TWISTING SINGLE COMPONENT YARNS.

A theoretical model was created for the twisting moment of single component yarns spun with stationary vortex technique. This model can be useful in examining deformations caused in drafting. The model was compared to tests of three types of yarns, and the results of the tests were found to be similar to the model. 11 refs.

FATIGUE OF COTTON AND VISCOSE STAPLE YARNS BY BIAXIAL ROTATION OVER A PIN.

The fatigue life of open end, ring spun, and siro spun yarns is investigated using the technique of biaxial rotation over a pin. Open end yarns have a significantly higher fatigue life than ring spun yarns. Mercerization increases fatigue life. For siro spun yarns, an increase in strand spacing increases fatigue life in a linear manner. 1..

MODEL TO ESTIMATE THE BREAKING ELONGATION OF HIGH TWIST RING SPUN COTTON YARNS. PART 2. APPLICABILITY TO YARNS FROM MIXTURES OF COTTONS.

The yarn elongation model proposed in Part One is examined for its applicability to mixtures of different cottons. Results show that the model can be used to estimate accurately the elongation of high twist single ring spun from mixtures of different cottons. 2 refs.

FACTORS AFFECTING PERFORMANCE OF HIGH MODULAR FILAMENT YARNS IN THE MANUFACTURE OF COMPOSITES.

High modular filament carbon yarns are tested to analyze their behavior in the manufacture of composites. Samples are tested for tensile strength, flexibility, friction and abrasion, abrasion and loss of fiber, and broken filaments. Low flexibility is a critical problems. Processes, such as braiding and winding, are optimized according to..

FRICTION SPUN YARNS VERSUS RING AND ROTOR SPUN YARNS -- RESISTANCE TO ABRASION AND REPEATED EXTENSIONS.

The behavior of friction spun yarns is compared with that of ring and rotor spun yarns when subjected to abrasion and repeated extensions. Testing confirms that DREF III friction spun yarns show less resistance to abrasion and repeated extensions than both ring and rotor spun yarns. The ring spun yarns show the best resistance to repeated..

PROPERTIES AND USE OF SPECIFIC HOLLOW-SPINDLE YARNS.

The hollow-spindle wrap-spinning process was used to prepare fancy yarns by varying both machine conditions and fiber types. Critical control parameters and characteristic yarn properties were identified. For example, a boucle-derivative yarn was evaluated in both woven and knit fabrics. This yarn was capable of simulating a terry-pile ef..

EFFECT YARNS -- PROPERTIES AND PARAMETERS.

Fancy or effect yarns are used frequently in apparel and upholstery fabrics and in handknitting. These yarns are classified according to the most significant parameters that control production. For example, raising is critical in the production of fluffy bulk yarns; blend preparation for nub yarns; and carding for ombre yarns. Properties ..

SOME FACTORS AFFECTING THE HAIRINESS OF POLYESTER BLEND YARNS.

The causes and remedies for hairiness in polyester blend yarns were studied. Poor ring frame condition due to traveler flutter, which is caused by improper matching of the traveler with the ring and high levels of humidity in ring spinning, were found to be the causes of excess hairiness from bobbin to bobbin were found to be a result of ..