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Lee J.Y.,Seoul National University | Oh S.J.,Hyosung RandDB Labs | Lee M.S.,Hyosung RandDB Labs | Park J.Y.,Polychrom | And 2 more authors.
Fibers and Polymers | Year: 2012

Phytoncide, a volatile essential oil produced by plants and trees, has not only anti-microbial activity, but also a stress relieving effect. We prepared a sheath/core type melt-spun fiber that releases phytoncide for a prolonged time. The fiber is comprised of a nylon sheath and a polypropylene (PP) core material. Phytoncide-containing microcapsules are embedded within the core part. The phytoncide microcapsule-containing nylon/PP sheath/core (M-Ny/PP) fiber has suitable mechanical properties for textile application. The phytoncide release from the microcapsule-containing the PP fiber (M-PP) reached a plateau level after 4 days and maintained that level for an additional 7 days, indicating a zero-order release after the initial burst. The M-Ny/PP fiber emitted the volatile phytoncide even though the fiber was spun at 250 °C. The release of phytoncide decreased in the M-Ny/PP fiber compared to the phytoncide microcapsule-containing PP (M-PP) fiber due to the dense sheath layer. © 2012 The Korean Fiber Society and Springer Science+Business Media Dordrecht. Source


Kim H.-A.,Korea Institute for Knit Industry | Kim S.-J.,Yeungnam University
Fibers and Polymers | Year: 2011

The purpose of this study is to objectively evaluate the seam pucker as a fabric formability and to analyze the effects of the fabric structural and sewing parameters to the seam pucker properties of the worsted and wool/polyester blend fabrics. The seam pucker of the worsted and wool/polyester blend fabrics according to the different types of fibre composition were surveyed by measuring fabric mechanical property using KES-FB and FAST systems and also seam puckering test was conducted by objective and subjective methods. In addition, the effects of fabric structural and sewing parameters to the seam pucker were investigated using statistical analysis. It was revealed that the effects of fabric structural parameters to the seam pucker were dominant than those of sewing machine conditions. It was shown that low pressor foot pressure and shuttle tension make good seam pucker, and high sewing speed and shuttle tension make bad seam pucker. And it was also shown that the precision on estimating of the seam pucker by KES-FB system was much higher than that of FAST system. And seam pucker values between objective and subjective methods showed good correlation. © 2011 The Korean Fiber Society and Springer Netherlands. Source


Yun H.,Seoul National University | Kim M.K.,Seoul National University | Kwak H.W.,Seoul National University | Lee J.Y.,Seoul National University | And 3 more authors.
Fibers and Polymers | Year: 2013

Sericin (SS) is a protein that is secreted by silkworms, but it is usually discarded during the degumming process. To obtain and make use of the sericin, we prepared sericin/glycerol/graphene oxide nanocomposite film. The inherent brittleness of pure sericin film was improved by the addition of glycerol (Glc) as a plasticizer. To compensate for the reduced stiffness, we added graphene oxide (GO) into the SS/Glc film. At concentrations of up to 0.8 wt% relative to SS, GO dispersed evenly in the SS matrix without any agglomeration. The maximum tensile strength (9.5±0.7 MPa) and Young's modulus (414.4±23.2 MPa) were obtained when the GO content was 0.8 wt% relative to SS. The elongation of SS/Glc/GO nanocomposite film also increased by approximately 40 % compared to SS/Glc film. The strong interfacial interaction between the SS and the GO was responsible for the increased stiffness. The increased elongation was due to the reduced crystallinity of the sericin matrix in the presence of GO. © 2013 The Korean Fiber Society and Springer Science+Business Media Dordrecht. Source


Park Y.W.,Chonbuk National University | Park Y.W.,Korea Institute for Knit Industry | Song I.J.,Uno and Company Co. | Kim H.C.,Chonbuk National University
Fibers and Polymers | Year: 2014

As PET (Polyester) fiber has better heat resistance than PVC fiber or modacryl fiber, it has been used as wig fiber for human hair alternatives. However, PET is heavier and has higher specific gravity than human hair, and therefore the authors attempted to make lighter wig fiber by blending PP (polypropylene) into PET by mixing the PET/PP blend with a compatibilizer, a ethylene-acrylic ester-GMA(EAG) component grafted material, to overcome poor compatibilities of PET and PP. The thermal properties of the PET/PP blend mixed with EAG were measured using DSC, and the results showed that EAG affected melting point and crystallization temperature of the blend polymer. As blend ratio of PP increased, specific gravity of blend fiber reduced and thermal shrinkage rate increased. Blend ratio of PP was greater for shorter lengths of initial curl, although curl loosening increased as time elapsed. © 2014 The Korean Fiber Society and Springer Science+Business Media Dordrecht. Source


Kwon O.-H.,Korea Institute for Knit Industry | Kim H.-C.,Chungwoon University
Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry | Year: 2013

Hanji has been used mainly for preservation paper because of superior mechanical properties. However, it was not used in printing for inkjet and laser printer-printed letters. In this study, machine-made Hanji was prepared with five different contents of paper mulberry 20,40, 60, 80 and 100% and managed by same pressure calendering. By increasing of paper mulberry contents, tearing index and folding endurance of machine-made Hanji increased because of increased fiber-to-fiber bonding. Printability property of machine-made Hanji improved by decreasing of paper mulberry contents. After 20 hours accelerated aging, the initial folding endurance of machine-made Hanji was reduced by approximately one-fourth degree. Between 40 and 100% contents of paper mulberry was showed similar levels about preservation property. The machine-made Hanji of paper mulberry 60% content was suitable for permanence and printability properties using preservation paper and printer-printed letters. Source

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