• Fibers and Polymers
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• v.7 no.2
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• pp.174-179
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• 2006

Dyeing and color fastness properties of a reactive disperse dye containing an acetoxyethylsulphone group on PET, Nylon, silk and N/P fabrics were examined. The reactive disperse dye exhibited almost the same dyeing properties on PET fabric as a conventional disperse dye except the level of dye uptake. The most appropriate pH and dyeing temperature for the dyeing of Nylon fabric were 7 and $100^{\circ}C$ respectively. The build-up on Nylon fabric was good and various color fastnesses were good to excellent due to the formation of the covalent bond. Application of the reactive disperse dye on silk fabric at pH 9 and $80^{\circ}C$ yielded optimum color strength. The rate of dyeing on Nylon fabric was faster than that on PET fabric when both fabrics were dyed simultaneously in a dye bath, accordingly color strength of the dyed Nylon was higher. The reactive disperse dye can be applied for one-step and one-bath dyeing of N/P mixture fabric with good color fastness.

• Fibers and Polymers
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• v.1 no.1
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• pp.59-65
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• 2000

In order to investigate psychoacoustic characteristics of fibers, and to compare them with sound physical parameters, each sound of 25 different fabrics consisted of a single fiber such as wool, cotton, silk, polyester, and nylon was recorded. Sounds of specimens were transformed into critical band diagram and psychoacoustic characteristics including loudness and sharpness for each sound were calculated based on Zwicker＇s models. Physical parameters such as the level pressure of total sound (LPT), level ranges (ΔL), frequency differences (Δf), AR coefficients (ARC, ARF, ARE) were obtained in fast fourier transform (FFT) spectrum. Nylon taffeta showed higher values for loudness than 2.5 sone corresponding to human low conversation, while most silk fibers generated less louder showing lower values for loudness than 1.0 sone. Wool fibers had higher loudness mean value than that of cotton, while the two fibers didn't differ in LPT. Loudness showed high positive correlation coefficients with both LPT and ARC. Sharpness values were higher for wool fiber group than other fibers. Sharpness was not concerned with loudness, LPT, and ARC, but the fabrics with higher values for sharpness tended to show higher ΔL.

• The Korean Journal of Rheology
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• v.8 no.2
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• pp.69-77
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• 1996

장섬유강화 열가소성 고분자 복합재료 (FRTP)의 난연성과 개선을 위하여 polyhenylene sulfide(PPS)를 첨가한 polyamide 6(PA6)/glass fiber (GF)의 FRTR를 제조하 였다. 고점성수지내에 보강섬유를 균일하게 분산시키고 함침성을 높임과 동시에 보강섬유의 손상을 방지하기 위하여 섬유상 수지와 보강섬유를 분섬비동장치에서 직접혼방시키고 이를 압축성형하는 독특한 공정을 도입하였다. 제조된 복합재료의 유변학적 특성 형태학적특성 인장 및 충격특성 열적특성, 난연성, 내약품성에 관한연구를 수행한 결과 복합재료와 기계적 특성을 약화시키지 않으면서도 난연성가 내약품성을 현격히 향상시킬수 있는 FRTP의 제조 가 가능함을 확인하였다.

• Journal of the Korean Institute of Electrical and Electronic Material Engineers
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• v.32 no.5
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• pp.432-436
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• 2019

In this study, we produced a light, flexible, wearable gas sensor by depositing MWCNTs (Multi-walled Carbon Nanotubes) into nylon. MWCNTs are widely used as a gas sensor material due to their excellent mechanical, electrical and physical characteristics. We produced a gas sensor to detect NOx gases by depositing nylon yarn in a MWCNT solution. The MWCNT solution was made by mixing 3 mg MWCNT in 5 ml of ethanol. Nylon yarn was placed in the manufactured solution and ultrasonic waves were applied using an ultrasonicator for 3 h, resulting in MCWNT deposition. The MWCNT-deposited nylon yarn was dried at room temperature for 24 h. The MWCNT-thin-film-coated nylon yarn was masked 1 mm apart, and gold was then deposited on the masked nylon yarn to create the gas sensor. The sensor then was installed in a chamber with a controlled atmospheric environment and exposed to NOx gas. The changing signal from the sensor was amplified to analyze its gas detection characteristics.

• Journal of the Korea institute for structural maintenance and inspection
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• v.13 no.3 s.55
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• pp.110-118
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• 2009

The tunnel structure is widely used for transportation in the mountain area. To reduce the duration of construction and thus the expense, a tunnel excavation is often performed simultaneously with a tunnel lining in in-situ. However, cracking of the tunnel lining may occur arising from the vibrating impact in the excavation process. The present study concerns the role of steel fiber and nylon fibers in tunnel lining concrete to reduce the vibrating impact. As a result it was found that both the nylon fiber and steel fiber improved the durability and physical properties of concrete.

• Journal of Fashion Business
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• v.8 no.6
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• pp.68-77
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• 2004

Hollow filament yarns provide better warmth to the touch, lighter in weight, increased opacity, and subtle luster compared to the regular synthetic filament yarns. However, luster properties of textile fibers or fabrics are often difficult to characterize, partly due to the fineness of the surface texture, the anisotropic nature of the weave structure, the complexity of the fiber array comprising a yarn, and the fiber structure itself. In this study, the fabric surface luster image was analyzed using image analysis methods after image acquisition. The hollow filament fiber was modeled using a three-dimensional modeling software. It was then ray-traced for comparing the virtual luster images of the hollow fiber and the regular fiber models based on shading models including photon mapping. The luster object size of the actual hollow filament fabric was smaller than that of the regular filament fabric. The shape of the luster object of the hollow filament fabric was dual peak type while that of the regular filament was single.

• Journal of the Korea Institute of Building Construction
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• v.8 no.5
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• pp.53-58
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• 2008

This study is to investigate experimentally residual strength properties of the high strength concrete containing the hybrid of nylon and polypropylene fiber at elevated temperature. Test results showed that specimens heated up to $300^{\circ}C$ exhibited similar strength properties to the one at room temperature. This result is significantly different from previous studies. but specimens heated over $400^{\circ}C$ showed dramatic decrease indicating similar tendency. For the residual strength properties, one at $300^{\circ}C$ even increased 10%, which is also different from previous studies, but it significantly decreased in $400^{\circ}C$ as widely expected. Melted pores by organic fibers in concrete specimens was observed with FE-SEM. For the density of concrete in elevated temperature, internal system in $200^{\circ}C$ had even denser than in $20^{\circ}C$, but was collapsed in $400^{\circ}C$.

• Textile Coloration and Finishing
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• v.14 no.6
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• pp.328-334
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• 2002

Nylon 6 staple ultramicrofiber(UMF, 0.074) and regular staple fiber (Regular, 2.0d) were annealed at In, 130, 160 and $180^\circ{C}$ under tension free for 10 min and U min. The treated fibers were dyed with Acid Red 18 and Blue n3. They were adjusted at PH 5.0 of dye bath in buffer solution of $CH_3COOH/CH_3/COONa(0.1mo1/1)$. Liquor ratio was kept at 1000:1. Dyeing rate of UMF annealed at $100^\circ{C}$ was decreased, but was increased for regular nylon. Also dye equilibrium of UMF at $100^\circ{C}$ was increased for Acid Red 18, but was decreased for Acid Blue 83. The intensities of X-ray diffraction peaks of UMF increased with increasing annealing temperature. Also the crystallinity of heat-sotted fibers by DSC thermogram was well agreed with the tendency of density Amino end group, moisture regain and water absorbency were decreased with increasing annealing temperature.

• Journal of the Korean Home Economics Association
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• v.27 no.3
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• pp.29-38
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• 1989

The purpose of this study is to investigate the physiological respones and subjective wearing sensations of the body of different materials of underwears. Experimental underwears were round neck-line shirts made of 100% cotton (60's plain stitch), 100% untreated nylon and hydrophillic finished 100% nylon (140 D. tricot). Four healthy female served as subjects. The experimental chamber was controlled at a constant temperature (23±1℃), constant relative humidity (53±3%) and air velocity of 0.25m/sec. The skin temperature, rectal temperature, pulse rate, clothing climate of temperature and humidity, and subjective wearing sensations were measured every five minutes during 75min. The results showed the level of the fiber hygroscopic properties was most relevant in the sensations of wearing: thus, cotton and treated nylon were felt by the subjects as more confortable fabrics, than untreated nylon.

• Journal of the Korean Professional Engineers Association
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• v.9 no.1
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• pp.35-39
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• 1976

Possible methods of protection of non cellulosic fibers, particularly nylon filament yarn, from the damaging effects of light are discussed. Manganese acetate, cupricacetate, G1-06-196 and sodium phosphate are used as a light stabilizer for nylon filament yarn. The light stability of filament containing different weight of TiO$_2$ is increased as the following order: Bright>Semi-Dull>Full-Dull The protection effect against light according to the present of the light stabilizer in filament increased in the following order: Manganese acetate> Cupric acid> G1-06-196> Sodium phosphate Manganese acetate is shown to be the most effecting salt for protecting nylon against light. 15 ppm of the salt is shown to be effective enough for protecting nylon filament yarn against light.