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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Textile Science and Engineering
Journal Basic Information
Journal DOI :
The Korean Fiber Society
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Volume & Issues
Volume 42, Issue 6 - Dec 2005
Volume 42, Issue 5 - Oct 2005
Volume 42, Issue 4 - Aug 2005
Volume 42, Issue 3 - Jun 2005
Volume 42, Issue 2 - Apr 2005
Volume 42, Issue 1 - Feb 2005
Selecting the target year
Analyzing the Dynamic Behavior of the Fabric Weft Density with the Consideration of the Beat-up Speed in Weaving Process
Huh You ; Kim Jong S. ; Chun D. H. ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 277~283
The visual quality of a fabric is directly connected with the fabric density, i.e., picks/em and ends/em, variations of which are influenced by the weaving process conditions. Any variation in the conditions during a weaving process can lead to a fabric flaw, which implies a deterioration of the fabric quality. The fault that appears frequently in weaving is the stop mark, the variation in fabric density, especially, weft picks per unit length. This research is to set up a model describing the pickspacing dynamics in the weaving process and to simulate the pickspacing changes under given initial conditions, considering the start-up velocity profiles. The results show that initial clothfell position is an important factor affecting the pickspacing unevenness. Thin and harsh-surfaced weft yarns are more sensitive to the pickspacing changes than the thick and even-surfaced, while a velocity profile for a restart, even not considering the dynamics of the machine parts, can bring about a stop mark, if the profile has a quadratic function form with respect to time.
Large Deflection of a Viscoelastic Beam
Lee, Kyung-Woo ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 284~287
The governing equation for a large deflection of linear viscoelastic beam is derived. Because of the complexity involved in the governing equation that is a nonlinear integro-differential equation, solutions were obtained by numerical approximations for the case of the cantilever beam under a concentrated load and a combined load.
Studies on the Transesterification of Poly(trimethylene terephthalate)/Poly(trimethylene naphthalate) (50/50) Blends Using
Choi, Jae-Won ; Oh, Tae-Hwan ; Kim, Young-Ho ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 288~295
Poly(trimethylene terephthalate) (PIT) and poly(trimethylene naphthalate) (PTN) blends of 50/50 weight ratio, T5N5, were prepared by solution blending-precipitation method, and the effect of melting time on the degree of randomness, sequence length, and crystalline structure of melt-pressed blends obtained by melting T5N5 on a hot stage at
for different times and quenching into liquid nitrogen was studied using DSC,
and WAXS. The T5N5 blend showed two
corresponding to that of PTT and PTN, which indicated that PTT and PTN were immiscible. But the melt-pressed blends melted at
for 2 minutes or more showed single
indicating that the system became miscible.
analysis confirmed that the blends became block copolymers and that the degree of randomness increased as melting time increased. The sequence length of PTT component was larger than that of PTN in the resultant copolymer. Although PTT and PTN were present in the same amount in the blend, PTT component crystallized more easily than the PTN component due to the larger block length of PTT. The crystalline structure of the component polymers was the same as that of homopolymers. The WAXS patterns showed that the crystalline structure of PTN in the melt-pressed blends was
when they were annealed at
but it was a-form when annealed at
, exhibiting the same behavior as homo PTN.
A Study on the High Performance Nanocomposite Fibers Based on Polybenzoxazoles(I)-Synthesis and Characterization of Polyhydroxyamide-clay Nanocomposites-
Baik, Doo-Hyun ; Lee, Won-Ok ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 296~301
In the present study we investigated a clay nanocomposite based on polybenzoxazole (PBO) in order to get high performance PBO nanocomposite fibers. We synthesized polyhydroxyamide (PHA), a precursor polymer to PBO, by low temperature polymerization of dihydroxybenzidine and isophthaloyl chloride. Three kinds of clay dispersions were prepared by in-situ polymerization method, direct mixing of PHA and organo-clay, and mixing with sonication, respectively. X-ray diffraction experiment revealed that PHA-clay nanocomposite showed exfoliation in both direct mixing method and mixing with sonication method. On the other hand, a PHA-clay composite prepared by in-situ method showed no intercalation and exfoliation. TGA and DSC study revealed that the PHA-clay nanocomposites could cyclize at lower temperature compared with PHA. This implies that clay nanoparticles affect the thermal cyclization reaction of PHA lowering the cyclization temperature.
Comparison of Mechanical Properties of Warp Knitted Fabrics Using PET and PTT Yarn
Chung Hyun Gee ; Park Shin Woong ; Kang Bok Chun ; Song Min-Hey ; Roh Yong-Hwan ; Yoon Hye-shin ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 302~309
In this study, the differences in the mechanical properties of PET and PTT warp knitted fabrics were studied, based on variations in the mechanical properties. The results of the research show that PTT warp knitted fabrics had lower flexibility than PET warp knitted fabrics which were opposed to the properties of the yams. However the results of bending and compression properties were almost similar in both PET and PTT warp knitted fabrics. Because the bulkiness of P1T yam compared with PET, the abrasion coefficient of PTT warp knitted fabrics was greater than that of PET. Thus, PTT warp knitted fabrics had some aesthetic differences compared with PET warp knitted fabrics, however, although the knitting conditions were similar.
Dyeing and Fastness Properties of Red Disperse Dyes from Heterocyclic Compounds
Park Jong Ho ; Lee Kwon Sun ; Koh Joonseok ; Bae Jin-Seok ; Kim Sung Dong ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 310~315
Disperse dyes derived from heterocyclic compounds such as pyridone, diaminopyridine, carbazole, and 2-phenylindole, have been known to possess high light fastness. Four heterocyclic azo disperse dyes were synthesized by using three diaminopyridines and 2-phenylindole as coulping components and their dyeing and fastness properties were compared with an aminoazobenzene disperse dye. The wavelengths of maximum absorption of the synthesized heterocyclic dyes were in the range of 508-528 nm. The molar extinction coefficients of dyes having diaminopyridine were higher than that of an aminoazobenzene disperse dye. The dyes derived from aminopyridine having phenyl group exhibited poor to moderate build-up compared to the aminoazobenzene dye. Wash, light, heat and rubbing fastnesses of heterocyclic azo disperse dyes were good to excellent. The light fastness was improved by 0.5-1 grade by the addition of a UV absorber.
Characteristics of Color and COD Removal of Dyeing Wastewater Using Electrolytically Produced NaOCl Solution (I)
Yoon, Yong-Soo ; Ha, Beom-Yong ; Thanh Huy, Ngo Van ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 316~322
This study was carried out to investigate the feasibility of using electrolytically generated NaOCl solution for treatment of wastewater containing an acid dye(C.I. Acid Red 114). The NaOCl was produced by the electrolysis of aqueous NaCl solution. In order to asses the treatment characteristics, we evaluated the effect of pH and mixing ratio of the NaOCl solution to colored wastewater on the color and chemical oxygen demand
removal. The optimum conditions for the dye and
removal were determined to be pH 5.0 and mixing ratio of 1 :9, at which more than
were removed within 10 min reaction time. Reaction rate constants for the 300 and 500mg/l of artificially prepared dyeing wastewater were estimated as 0.1764 and
for color removal and 0.1197 and
A Study of Human Body Section Curve Modeling by Using Least Square NURBS Approximation Method
Han Sung Soo ; Bae Han Jo ; Park Jung Whan ; Kwon Oh Hyun ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 323~328
The paper proposes a method of constructing the three-dimensional CAD model from digitized cloud-ofpoints data of the human body, thereby automatically extracting several featured dimensions. The main steps are; segmentation, sectioning, fairing and surface approximation. In segmentation process the input three-dimensional set of points are grouped into each functional part of the human body by searching the boundary points when being viewed from a certain direction. The next step slices the grouped points to obtain section curves which will be faired (smoothed) by the difference-fairing method. Each faired section curve (a set of points) is approximated to the NURBS form by use of well known method, from which we can construct a NURBS surface. The parametric surfaces for functional parts of a human body are interrogated to extract several featured dimensions of a human body.
Filtration Performance and Physical Properties of Bag Filter Media with Polytetrafluoroethylene Coating Treatments
Yeo, Sang-Young ; Kim, Sook-Rae ; Jeong, Sung-Hoon ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 329~335
Bag filter media were prepared by a combination of needle punching and thermal bonding processes and treated with Polytetrafluoroethylene(PTFE) aqueous solution. The air permeability of the prepared filter media increased with increasing needle strokes. As needling strokes increased, the pore size distribution became narrow and the tensile strength in the machine and cross direction approached an intermediate value suggesting isotropic nature. From the result of air filter performance test, the pressure difference of bag filter media decreased and the collection efficiency increased with increasing-needle strokes under a constant air flow rate. Both air permeability and average pore size of the coated filter media were largely reduced by the PTFE coating treatment. After PTFE coating, we identified a big decrease in the dust concentration compared with control media. Therefore, the filtration performances such as collection efficiency and pressure difference of bag filter media were promoted by the PTFE coating treatment.
Elastic-Plastic Analysis of Three Point Bending Tests for 3D Circular Braided Glass Fiber Reinforced Composites
Ryou Hansun ; Kim Ji Hoon ; Lee Myoung-Gyu ; Kim Dongun ; Lee Hyung Rim ; Chung Kwangsoo ; Youn Jae Ryoun ; Kang Tae Jin ;
Textile Science and Engineering, volume 42, issue 5, 2005, Pages 336~340
In order to describe the mechanical behavior of highly anisotropic and asymmetric materials such as fiber reinforced composites, the elastic-plastic constitutive equations were used based on the recently developed yield criterion and hardening laws. As for the yield criterion, modified Drucker-Prager yield surface was used to represent the orthotropic and bi-modular (asymmetric) properties of composite materials, while the anisotropic evolution of back-stress was used to account for the hardening behavior. Experimental procedures to obtain the material parameters of the hardening laws and yield surface are presented for 3D braided glass fiber reinforced composites. For verification purposes, finite element simulation results based on the proposed constitutive laws have been compared with measurements for the three point bending tests.