• Textile Coloration and Finishing
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• v.33 no.4
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• pp.302-308
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• 2021

Air filters are being used in countless places from industrial sites to everyday life. The spread of the COVID-19 virus, which started in 2019, is disrupting people's daily lives, and the importance of air filters as a basic means to prevent the spread of these diseases is further highlighted. In this study, the purpose was to develop another type of air filter media with excellent barrier properties that can replace PP meltblown nonwoven fabrics widely used commercially due to its excellent electrostatic properties, differential pressure and filtration efficiency. Therefore, wet-laid nonwoven for air filters were manufactured using plexi-filaments formed through flash spinning and having various fiber diameter from hundreds of nanometers to tens of micrometers, and its applicability as an air-filter media was investigated compared to the meltblown nonwoven. As a result of the performance evaluation, it was found that the filtration efficiency and barrier performance at 0.3㎛ was superior to that of the meltblown nonwoven of the same weight, although the differential pressure was high due to morphological properties of the plexi-filament.

• Fashion & Textile Research Journal
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• v.17 no.6
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• pp.978-987
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• 2015

This study investigates the awareness levels of Korean textile companies and develops appropriate response plans for the Korea-US Free Trade Agreement. The study also explores practical and realistic directions that the Korean textile industry must initiate. A qualitative study was conducted on 10 individuals for a more in-depth and demonstrative understanding that provide a better awareness on the responses of the textile industry towards the Korea-US FTA. The results of this study are as follows. First, the effect of the Korea-US FTA on the textile industry was insignificant. Second, industry members determined that fabric sectors and specialized fabrics (such as industrial materials and finished clothing products) could realize benefits through the Korea-US FTA. Third, industry members emphasize that the current focus is on FTAs by countries that have solidified their positions as manufacturing and sewing bases for the US and Europe (such as Southeast Asia) and not the Korea-US FTA. Based on results acquired through this study, the response measures to enter the U.S. market are as follows. First, the industry must develop high-performance and high value-adding direct export products suited to the needs of the US market in order to realize the benefits of the Korea-US FTA. Second, the industry and government must cooperate to actively host and participate in overseas trade shows that can actively open sales channels within the US. Third, the self-sustainability of textile companies must be cultivated through continuous and focused government training.

• Advanced Composite Materials
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• v.17 no.3
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• pp.247-258
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• 2008

This paper is concerned with the long-term performance of geo-textile (GT) composites in terms of creep deformation and frictional properties. Composites of PVA GT and HDPE GM were made to investigate the advanced properties of long-term performance related to waste landfill applications. The same experiments were also performed for typical polypropylene and polyester GT and compared to PVA GT/HDPE GM composites. We also develop high performance GT composites with GM by using PVA GT, which is capable of improving the frictional properties and thus enhances long-term performance of GT composites. Experimental study reveals that the friction coefficient of GT composites is relatively large compared with those of polyester and polypropylene non-woven GT as long as the friction media has similar size to the particles of domestic standard earth. In addition, the geo-composites bonded with geo-grid by a chemical process were investigated experimentally in terms of strain evaluation and creep response values. Geo-grid plays an important role as a reinforcing material. Three kinds of geo-grid were prepared as strong yarn polyester and they were woven type, non-woven type, and wrap knitted type. The sample geo-grids were then coated with PVC. The rib tensile strength tests were conducted to evaluate geo-grid products in terms of tensile strength with regard to single rib. The test was performed according to GRI-GGI. It was concluded again from the experiments that the tensile and creep strains of the geo-grid showed such stable values that the geo-grid prepared in this study could protect geo-textile partially in practical structures.

• Proceedings of the Korean Fiber Society Conference
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• 2002.04a
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• pp.53-56
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• 2002

Today, interest in electroluminescent(EL) diodes has been increasing since vacuum-sublimed thin-film dioes exhibited high performance. And since the discovery of electroluminescence from aluminaqinone, which has uniform $\pi$-conjugated segment by Eastmann kodack,$^1$ lots of attentions have been concentrated on organic EL devices. However, they have disadvantage such as low mechanical intensity, thermic crystallization. (omitted)

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.77-80
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• 2007

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.115-118
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• 2007

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.61-65
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• 1998

Epoxy resins are currently one of the most widely used thermoset polymers. Applications on epoxy-based materials range from common to structural adhesives as well as to matrix materials for high performance composites. The outstanding versatility of this resin can be related to the reactivity of the epoxy group, which can be opened by a large number of different chemical compounds, such a aliphatic and aromatic amines, anhydrides and poly-amides. (omitted)

• Textile Coloration and Finishing
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• v.10 no.1
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• pp.20-24
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• 1998

Oligomeric extracts of poly(ethylene terephthalate-co-ethylene isophthalate)s [(PET/EI] are analyzed by high performance liquid chromatography(HPLC) and nuclear magnetic resonance spectroscopy (NMR). Existence of separated peaks for small cyclics of trimer and tetramer gives the existence of structural isomeric forms. NMR confirms that cyclization of PET/EI occurs more easily at the site of isophthaloyl unit.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.2
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• pp.919-931
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• 2018

In this study, we developed textile proximity sensor using conductive textile to develop a Medication adherence management system. The textile proximity sensor utilizes the principle of the capacitor, and the ring type sensor used to reduce the fringe-effect. When take medicines, we made a custom PCB that converts the change of the data measured by the sensor into a digital value so that transmitted the PC. In order to compare the performance of the system, we evaluated the correlation between the data variation according to the quantity of pills in the electronic compact scale and the data in this system. As a result, Pearson's correlation coefficient was 0.956(p<0.01), confirmed a good correlation between the scale and our system. Therefore, we concluded that our system evaluated able to whether or not to take medication.

• Fashion & Textile Research Journal
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• v.11 no.4
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• pp.566-573
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• 2009

The purpose of this paper was to collect the information of textile and fashion trade show exhibiting such as the exhibition objectives, trade show selection criteria, reasons for not exhibiting, and exhibition performance. The data were collected from textile and fashion companies which participated in the Preview in Daegu or Seoul Fashion Sourcing Fair, or through the Research Company. The results showed that the most heavily weighted factor among reasons for not exhibiting was "high cost" and the most important exhibiting objective was "identifying the need and the preference of potential customers". "The quality and the quantity of sales lead" was ranked highly among exhibiting selection criteria. Also, the future of exhibition industry was also recognized positively and "effective PR and marketing activities" was assigned high importance among services provided by the organizer.