A New Concept in Cooler Design for False-Twist Texturing Systems

In false twist texturing, yarns are bulked by the sequential operations of twisting, heating, and cooling. The current speed for false twist texturing is limited by the early onset of threadline instability. It is well known that there is a potential to increase speeds by reducing the length of each element of the process. This paper desc..

Home | News & Info | KOTITI 라이브러리 | 섬유기술정보 I 등록일 : 2012.10.30 I 조회수 : 145

Effect of Hydrophile-Lipophile Balance Values of Surfactant Mixtures on the Detergency of Oil-Soiled Single Fibers

The detergency of Lyocell and polyester fibers soiled with octadecane or oleic acid is investigated with anionic-nonionic surfactant mixture solutions of various hydrophile- lipophile balance (HLB) values. The HLB values for anionic-nonionic surfactant mixtures, sodium dodecyl benzene sulfate (LAS)-nonyl phenol ethoxylate (NPE), 1-hexadec..

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Analysis of the Surface Chemistry of Linen and Cotton Fabrics

Raw cotton and flax fibers and fabrics contain noncellulosic components such as waxes, pectins, proteins, and hemicelluloses, and major parts of these components are located on the outer surfaces of the fibers. In this work, the surface chemistry of cotton and linen fabrics is analyzed with Electron Spectroscopy for Chemical Analysis (ESC..

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Crosslinking of Cotton Cellulose with Pre-reacted DMDMDHEU-AA. Part II: Reaction Kinetics

Dimethyldimethyloldihydroxylethyleneurea (DMDMDHEU) and pre-reacted dimethyldimethyloldihydroxylethyleneurea and acrylic acid (DMDMDHEU-AA) are used to study the specific rate constant and other activation parameters. At 100°C, the rate constants (k) for DMDMDHEU-AA crosslinking agents are higher than that for the DMDMDHEU, and those for ..

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Cotton Maturity and Its Influence on Nep Formation

The nep number in yarn depends on both the nep number in the raw material and changes in the number and size of neps in the spinning process. Therefore, the two problems need to be analyzed separately. The first problem consists of testing the value changes of some cotton parameters on different processing stages, which influence the appe..

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Deformation Processes in Regenerated Cellulose Fibers

Molecular deformation processes of regenerated cellulose fibers are investigated using Raman spectroscopy. These fibers have well-defined Raman spectra, and the main Raman bands in the region of 895 to 1170 cm-1 shift to lower wavenumbers upon application of tensile strain and stress. The peak positions of the Raman bands at 895 and 1095 ..

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Manipulating Fiber Structure to Stabilize Geometry in Fibers and Yams

Single-filament crimp within a carpet tuft is its geometric feature most responsible for body in cut-pile saxony carpet. Yam twist within the tuft is most responsible for imparting wear. Crimp setting factors can be manipulated to influence either the amount of crimp or its permanence, but not without consequences: factors impacting crimp..

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Intelligent Animal Fiber Classification with Artificial Neural Networks

Artificial neural networks (ANN) are increasingly used to solve many problems related to pattern recognition and object classification. In this paper, we report on a study using artificial neural networks to classify two kinds of animal fibers: merino and mohair. We have developed two different models, one extracting nine scale parameters..

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Effect of Slipping Yarn Friction on Stress Concentration Near Yarn Breaks in Woven Fabrics

The assumption of a constant friction force (simple slip assumption) on broken slipping yarns, which has been used in the micromechanical analysis of damage growth in stressed plain weave fabrics, is evaluated. In this analysis, the frictional traction on slipping yarns is variable. It starts from zero at the cut end of the yarn and appro..

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Moisture Accumulation in Sleeping Bags at Subzero Temperatures—Effect of Semipermeable and Impermeable Covers

Because subzero temperatures are expected to affect the vapor resistance of micro porous membranes, the effect of using semipermeable and impermeable rain covers for sleeping bags on moisture accumulation in the bags during 6 days of use at -7°C is investigated. Moisture accumulation is related to the vapor resistance of the materials. Th..

Home | News & Info | KOTITI 라이브러리 | 섬유기술정보 I 등록일 : 2012.10.29 I 조회수 : 385