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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Textile Science and Engineering
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Journal DOI :
The Korean Fiber Society
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Volume & Issues
Volume 45, Issue 6 - Dec 2008
Volume 45, Issue 5 - Oct 2008
Volume 45, Issue 4 - Aug 2008
Volume 45, Issue 3 - Jun 2008
Volume 45, Issue 2 - Apr 2008
Volume 45, Issue 1 - Feb 2008
Selecting the target year
A Study on the Optimal Tension Control of Servo Driver System
Lee, Sang-Hwa ; Jeong, Hye-Cheun ; Lee, Huck-Jin ; Lee, Jeh-Won ; Chun, Du-Hwan ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 137~143
Tension control of fiber manufacturing process system is usually achieved by using loadcell and powder clutch, which require additional mounting space, reduce the reliability in harsh environments and increase the cost of the system. The physical properties of textile fabrics are very sensitive to several factors(temperature, humidity, radius change of warp beam etc.)which result in tension change. In this paper, the optimal tension control of servo motor driver system using PI control algorithm is presented. The proposed tension algorithm is robust to disturbance and tension variation. First the modeling and dynamic behaviors of the tension system is described. Then validity and usefulness of the proposed algorithm and mechanical system are thoroughly verified through numerical simulation and actual conditions.
Bundle Thickness Distribution on the Drum Surface in the Friction Spinning System
Kim, Jong-S. ; Lehmann, Beata ; Huh, You ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 144~148
This study is dealing with the friction yarn formation process, where the fiber fleece is transformed into a bundle. The bundling procedure can be thought of as the fiber stapling and rolling on the friction drum, of which the dynamics can be described on the basis of the mass conservation. On the basis of the dynamic model obtained the bundle thickness on the friction drum was simulated according to the step and sinusoidal changes in the input fleece thickness. Results showed that the bundle radius response to the step change of the input fleece thickness can be approximately described with the characteristics of an integrating system with the amplitude limit. The sinusoidal change of the input fleece thickness yielded the bundle radius change that depended on the input change frequency. Under certain frequencies of the input fleece thickness change the yam take-up speed could amplify the output yam irregularity, which confirms the possible existence of the process resonance.
Characteristics of Draft Irregularity under the Dynamic Stability
Kim, Jong-S. ; Huh, You ; Suh, Moon-W. ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 149~158
Factors influencing the product quality of the roller drafting operation can be referred to as the arrangement of the bundle fibers and the bundle thickness. However, the movement of individual fibers cannot be exactly controlled during the processing. The state of the bundle flow in the processing can be disturbed easily due to the change of the raw material or the process conditions, which can be attributed to the fact that the bundle flow dynamics is different from the continuum. Uncontrollable bundle fibers lead to the irregularity of the output bundle thickness. This study reports on the characteristics of the draft irregularity by simulation, when the system has the dynamic stability on the basis of the bundle flow dynamic model. Results reveal that the thickness variation of the drafted bundle depends on the model parameters; a uniform thickness or a periodical variation in thickness appears. The draft irregularity can take place more sensitive to the input bundle thickness than to the draft ratio in a limited range of the output bundle thickness variation. The thickness irregularity can commonly characterized by the fundamental frequency, even though the system has the parameters that assure it to be stable. The range of the irregularity frequency band, above which the thickness variation disappears, is dependent on the disturbing source, but the upper limit of the frequency range reads 5 times of the fundamental frequency that is defined by the transient characteristics of the bundle flow system.
Preparation of Electrospun Poly(hexamethylene sebacamide)/Multiwalled Carbon Nanotube Nanofibrous Membranes
Kang, Min-Sung ; Kwon, Soon-Min ; Kim, Don-Young ; Kim, Hun-Sik ; Jin, Hyoung-Joon ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 159~165
This study used a new and simple processing route to incorporate multiwalled carbon nanotubes (MWCNTs) into a polymer matrix via in-situ interfacial polymerization and electrospinning. Poly(hexamethylene sebacamide) (nylon 610)/MWCNT composites were prepared using two liquid phases containing the reactants and MWCNT. One phase contained a solution of sebacoyl chloride in carbon tetrachloride and the other contained a solution of hexamethylenediamine and MWCNT in water, which was prepared by sonication with a surfactant. Electrospinning of the composite solution produced fibers with well embedded MWCNT. We investigated morphology of individual MWCNT incorporating in nylon 610 fibers by scanning electron microscopy and transmssion electron microscopy and the electrical conductivity of the electro spun nylon 610 fibers with MWCNT.
Preparation of High Performance Thermoset Fiber Using Polybenzoxazine and Polyacrylonitrile
Kim, Ho-Dong ; Nam, In-Woo ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 166~172
The unique monomer hybrid wet-spinning process was utilized to prepare the polybenzoxazine fiber which is composed of novel class of Phenolic thermoset polymer. This fiber has excellent thermal stability as well as a unique microporous structure and a typical sheath-core structure. Also, it is shown that polyBAa15/PAN hybrid fiber has a high char yield of 47% which is higher than the sum of each component's char yield.
Modification of Polypropylene by Grafting of Maleic Anhydride with EMAA Copolymer
Kim, Jin-Hoon ; Kim, Seok-Hoon ; Hong, Won-Pyo ; Kim, Joon-Ho ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 173~178
Polypropylene (PP) was modified by grafting of maleic anhydride(MAH) and blending of ethylene-methacrylic acid (EMAA) copolymer in biphenyl solution at
. The films were examined by
NMR, FT-IR, contact angle measurement and adhesion test in various MAH and EMAA copolymer compositions. The transition temperatures of the films remained constant irrespectively of MAH and EMAA copolymer compositions. From NMR and FTIR spectra the grafting of MAH onto PP backbone was checked. With contact angle measurements, it could be confirmed that the grafting of MAH and adding of EMAA copolymer onto PP made its surface more polar. Through the adhesive force evaluations, the value of peeling strength gave the maximum at the 1wt% of MAH and 0.5 wt% of EMAA copolymer.
Synthesis and Moisture Transport Properties of Segmented Copolyetherester Based on Poly(propylene glycol) and Poly(butylene 2,6-naphthalenedicarboxylate)
Park, Woo-Lee ; Yoon, Kee-Jong ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 179~185
Segmented block poly(ether-ester) containing poly(propylene glycol), PPG, soft segments and Poly(butylene 2,6-naphthalenedicarboxylate), PBN, hard segments were prepared by transesterification and polycondensation. Synthesis of the PBN/PPG copolymer were confirmed by
-NMR. Thermal behavior was measured by DSC and TGA. Permeability measurements of PBN/PPG copolymer films were made using an upright cup method. Although
of PBN/PPG copolymer decreased slightly with increase in PPG composition in the PBN/PPG copolymer, their melting points are in excess of
which is required for firefighter's protective clothing. The moisture vapor transmission rate(MVTR) increased with addition in the amount of PPG and rising of temperature significantly. But the reduction in density due to the introduction of PPG instead of poly(ethylene glycol), PEG, as the soft segment did not influence MVTR, and the MVTR values were lower compared with commercial breathable films.
Dyeing Properties of Polyurethane-coated Polyester with Disperse Dyes
Park, Jong-Ho ; Kim, Sung-Dong ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 186~191
Disperse dyes having different molecular structures were prepared and their dyeing properties on PU, PET and PU-coated PET were studied. A disperse dye with common structure showed faster absorption rate into PU for its high affinity to PU at low temperature and this resulted in faster dyeing rate on PU-coated PET than on PET. On the other hand, a disperse dye having bulky structure was adsorbed into both PU-coated PET and PET at similar rate and it showed little affinity to PU in the whole dyeing temperature range. The amounts of disperse dyes eliminated from substrates by reduction clearing and washing fastness test were also measured. It was found that the disperse dye with bulky structure slipped out of PU in reduction clearing and washing fastness test in smaller quantity than the disperse dye with common structure. This phenomenon was corresponding well with the result of washing fastness test.
Flame Retardant Finish of PET Fabrics via UV Curing of Phosphorous-containing Methacrylates
Jeong, Yong-Kyun ; Jang, Jin-Ho ;
Textile Science and Engineering, volume 45, issue 3, 2008, Pages 192~198
Flame retardation of PET fabric was carried out via UV curing of three phosphate-containing methacrylates and ammonium polyphosphate(APP). Add-on and add-on efficiency increased with increasing functionality of the methacrylates where the photopolymerization occurred on the PET fabric rather than inside of fabric. The APP addition increased the flame retardancy with slight decrease in fixation. The Flame retardancy up to a LOI of 25.9 was achieved by the UV coating of MMEP alone. The UV coating of MMEP with 25%(owm) of APP addition showed the highest LOI value of 28.5 which is durable to five laundering cycles. The obtained flame retardancy of UV-coated PET fabrics with the phosphorous-containing methacrylates may result from a condensed phase mechanism as indicated by lowered thermal decomposition temperatures, higher carbonaceous char content with higher residue number, which reduces the generation of flammable materials by changing the pyrolysis path of PET.