This study deals with the effect of cross-sectional shape of yarn duct of interlacer on the performance of interlaced yarn and aims at finding the interlacers with better performance. The performance of the interlaced yarn is evaluated by the number and strength of tangles. Seven interlacers with different shapes of yarn duct were designed. Each of them has the same cross-sectional area of yarn duct. Experiments were carried out at various supplied air pressures, yarn speeds and feed ratios. We have found that the interlacer with round cross-sectional shape of yarn duct is capable of producing an interlaced yarn with a large number of tangles and the cornered cross-sectional shape is effective in improving the strength of tangles. Among these seven interlacers, the interlacer with an elliptical or an inverse-triangular shape has the best processing performance. And the interlacer with a square cross-sectional shape has the worst processing performance.

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Penetration flows of a Newtonian fluid through a viscoelastic fluid in an abrupt contraction channel were numerically analyzed. In the numerical simulation, the Phan-Thien Tanner model was employed as a constitutive equation. The level set method was used to numerically represent the interface between two fluids and effects of interfacial tension were introduced into the numerical simulation using the continuum surface force model. The numerical computation predicted the occurrence of fluctuation of interface between a Newtonian penetrating fluid and a viscoelastic fluid in a downstream conduit of the contraction channel. This fluctuation was a typical phenomenon for penetration flows through a viscoelastic fluid and was not observed in a penetrate flow through a Newtonian fluid. Furthermore, it was confirmed that the normal stress effect drove the fluctuation and the amplitude of fluctuation when elastic properties were strong.

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The factors of dyeing technology for PET knit fabrics using liquid flow dyeing machine include the dye exhaustion property of PET fiber and liquid flow parameters in the dyeing machine. This article is focused on: 1. The relationship between the concentration of disperse dyes and critical temperature zone, 2. The effect of pump flow on fabric running speed and even dyeing. As the results proved 1, the concentration of disperse dyes in the PET dyeing got lower with lower critical temperature zone 2. In the adjustment of dyeing pump flow and nozzle pressure, the running speed of pump at the same nozzle pressure did affect the dyeing flow with the differential rate of ± 10% while the fabric running rate with lower rate 3. The application of fabric running speed and nozzle pressure was influenced by the flow rate. Therefore, the optimization of dyeing process should combine the three components of fabrics, dyes and dyeing machine, in order to achieve the aims of energy saving and quality improvement.

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To obtain fundamental information for designing lateral stripe patterns using white-black stripes on ladies legwear, effect of pattern elements on visual impressions of the stripes was studied using the semantic differential method from the perspective of Kansei engineering. Female university students were used as evaluators. Model images printed on white paper were used as samples. Numerical ranges of the line width of one-line and rectangular models that gave evaluators a thinner impression were clarified. When the same stripes were printed on different shapes (the rectangular model, the legtrapezoid model, and the leg model), their visual impressions obtained were partly identical and partly different. We identified two ladies leg models with white-black stripes that looked thinner, longer and more slender.

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Orientation evolution of thin disk particles, such as talc and mica, in a Newtonian flow through a L-shape channel was numerically simulated by decoupling flow kinematics with particle orientation using the Jeffery equation to obtain the knowledge of the processing of thin micro-particle reinforced composites: (1) periodic flip-over of a thin disk particle moving near the channel wall can be clearly observed for large initial azimuthal angle: (2) when a thin disk particle rounds the corner of a L-shape channel, a disk particle tends to align in the direction perpendicular to the flow plane as it approaches alignment along the streamline.

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In this study, we investigated the influence of fragrance contained in household fabric softener on the autonomic nervous activity by the ECG measurement, when five subjects smelled the fragrance of the household fabric softener and mimetic sweat odor. In comparing the result of ECG on three different odors, the sympathetic nerve was largely activated by smelling the mimetic sweat odor. Therefore it is found that the favorite fragrance of household fabric softener restrain the soul stress caused by every day odors.

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