• Journal of Korea Technical Association of The Pulp and Paper Industry
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• 제41권3호
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• pp.49-59
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• 2009

The bast fibers of paper mulberry were dyed by using sappan wood, gardenia, and gallnut extracted under various extraction conditions. The surface absorption rates, color, and sunlight fastness of the dyed fibers were compared to those of the dyed cotton and silk. The K/S values of silk showed the highest values, followed by gallnut, gardenia, and sappan wood. The optimum extraction conditions of the dye materials were 20 g/L (input amount of dye materials per liter), $90^{\circ}C$ (extraction temperature), and 30 minutes (extraction time). The values of saturation were observed to increase with the increase of the amount of dye materials, extraction time, and extration temperature. However, no effect were found on the values of hue and lightness. In all samples, the developed colors dyed by sappan wood and gardenia were the series of YR, and Y, respectively. The colors of dyed cotton and bast fibers of paper mulberry by gallnut were the series of Y and the dyed silk showed the series of YR. The values of saturation of the bast fibers of paper mulberry by sappan wood and gardenia showed the highest values of saturation, followed by cotton, and silk. In the case of gallnut, cotton showed the highest values of saturation, followed by the bast fibers of paper mulberry, and silk. The sunlight fastness were not improved in all dyeing conditions.

• Fashion & Textile Research Journal
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• 제20권6호
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• pp.752-758
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• 2018

Due to environmental pollution and human hazards of some synthetic dyes, the global fashion companies are increasingly interested in eco-friendly products, especially natural dye. For the globalization of natural dyeing industry based on this concern, however, there are some deficiencies of standardization, specification, and conformity assessment on natural dyestuffs as well as natural dyeing process. These obstacles should be not only studied but also defined for a commercial transaction. Accordingly, a study for conformity assessment on commercialized natural dyestuffs (red) was conducted by HPLC analysis in this study. As the results of HPLC analysis, alizarin and purpurin, representative index ingredients, were detected in most of the samples, but the index ingredient content in each sample was different. In addition, some samples showed the variety of peaks including the index ingredients and others. It was inferred that the representative index ingredients could be used on the traceability of natural sourced dyestuffs. These results are related to the index ingredient consistency, standardization, and reproducibility of natural dyed products including such as yarns, fabrics, garments, and so on. Therefore, the present study was demonstrated that in order to determine the conformity assessment system for the satisfaction of all stakeholders, the offering of information on the origin, manufacturing process, and index ingredient content of natural dyes should be prioritized.

• Journal of Korea Technical Association of The Pulp and Paper Industry
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• 제35권1호
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• pp.48-53
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• 2003

The objective of this study was to find in what color Korean handmade paper(Hanji) is dyed when it is dyed with a pigment extracted from waste onion peelings using different kinds of mordant, and how the paper is discolored and variety of strength under the condition of accelerated aging test. The results of this experiment are as follows. 1. Korean handmade paper was dyed in different colors according to the kinds of mordant. Mainly it was dyed in orange-brown, and sometimes in gold or khaki. 2. Korean handmade paper dyed was not discolored much, which suggests that the pigment is strong under the condition of aging. 3. As for durability, Korean handmade paper dyed in gold was strongest. Korean handmade paper, to which aluminum sulfate, iron sulfate or sodium dichromate was applied as mordant, had poor durability. Thus, these were not suitable as mordant.

• Structural Engineering and Mechanics
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• 제86권2호
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• pp.211-220
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• 2023

The textile industry has benefited from nanotechnology in various fields of application as the use of nanomaterials, and nanotechnology is multiplying. Nanoparticles can increase the performance of textiles by up to 100 times when used in finishing, coating, and dyeing techniques, providing them with capabilities they did not previously possess. Nanotechnology is used in the textile chemical industry to produce sports mats with stain resistance, flame resistance, wrinkle resistance, moisture management, antimicrobial quality, and UV protection. The incorporation of nanomaterials into fabrics can have a significant effect on their properties, including shrinkage, strength, electrical conductivity, and flammability. Various inventions and innovations may result from nano-processed textiles in the future, thus leading to the advancement of science. This article presents the construction of sports engineering structures with high resistance to improve the quality of sports training. The mechanical properties of sports mats are improved with the help of nanotechnology. Strength, elasticity, and tear resistance are among these properties. This method enables the production of elastic, durable, and tear-resistant sports mats.

• Composites Research
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• 제31권4호
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• pp.122-127
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• 2018

Sandwich composites of carbon fiber reinforced plastic(CFRP) and polymer foam will be used to automobile and aerospace industry according to increasing importance of light weight. In this study, mechanical and heat resistance properties of sandwich composites were compared with type of polymer foam (polyethylene terephthalate(PET), polyvinylchloride(PVC), epoxy and polyurethane). All types of polymer foams were degraded to 30, 60, 120, 180 minutes in $180^{\circ}C$. After heat degradation, the polymer foams were observed using optical microscope and compressive test was performed using universal testing machine(UTM). Epoxy foam had the highest compressive property to 2.6 MPa and after thermal degradation, the mechanical property and structure of foam were less changed than others. Epoxy foam had better mechanical properties than other polymer foams under high temperature. Because the epoxy foam was post cured under high temperature. As the results, Epoxy foam was optimal materials to apply to structures that thermal energy was loaded constantly.

• Fashion & Textile Research Journal
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• 제24권5호
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• pp.557-566
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• 2022

This study aims to investigate Jinju silk companies, production items, and silk industry supporting projects from 2019 to 2021 in order to discuss the current status of the silk industry. The following are this study's methods: First, a list of Jinju silk companies that have been operating for the past three years (2019-2021) was prepared to investigate the current status of the Jinju silk industry. Second, an investigation was conducted into the representative products produced in Jinju over the past three years; this investigation was conducted using direct interview. Third, an investigation was conducted on the projects that supported the Jinju silk industry over the past three years, and the list of members of the Gyeongnam Textile and Jinju Silk Industry Cooperative Association-a facility of Gyeongsangnam-do Province, the Jinju City Hall brochure (2019), and the SMINFO(SMall business status INFOrmation System) were utilized for this purpose. The following are the results: First, Jinju silk companies are classified into four categories, namely weaving, dyeing, twisting, and designing companies. According to data from 2021, 83% (34 of 41) of silk companies were weavers. Second, the demand for solid fabrics has increased over the past three years. The demand for patterned jacquard fabrics in producing Hanbok and Western-style clothing has decreased. Third, support for the Jinju silk industry could be classified into five categories: support for the operation of silk research institutions, support for the diversification of Jinju silk, support for the promotion of Jinju silk, support for the operation of silk manufacturers, and others.

• The Research Journal of the Costume Culture
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• 제12권6호
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• pp.999-1009
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• 2004

Chitin is a derived product from the shell of shrimp or crab. Chitosan, a deacetylated product of chitin, has widely been used in the biomedical sector, food industry, and textile industry. Chitosan exhibits fiber-forming property under certain conditions. Nonwoven fabrics made of chitosan fibers may have diverse applications in the industry. Previous studies have revealed that the dye uptake properties of natural dyestuffs improved by the chitosan pretreatment on the fabric specimens. In this case, fabric specimen is coated with acidic salt form of chitosan, which is different from the pure chitosan, since the coating process employes coating with the acidic solution of the chitosan and subesquent drying. In this study, chitosan nonwoven fabric samples were prepared from chitosan sample having deacetylation degree of $100\%$ and molecular weight of 650,000. Chitosan nonwoven fabrics maintain the form of $-NH_2$ end-group. These in turn exhibit higher dye uptake ability than the fabrics coated with chitosan acidic solutions do.

• Fashion & Textile Research Journal
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• 제19권2호
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• pp.109-120
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• 2017

In the textile industry located in Gyeonggi-do, 85% of small-sized firms have less than 10 employees; in addition, the most of them are characterized by a vendor relying specialization system that conducts foundry from the vendor that managed marketing, textile design development, and quality checks according to unit stream. The breakaway of these vendors accelerated over the last 7 years; however, industry survival is at stake because the specialization system and orders have collapsed. The following four main policies must be implemented to overcome industry hardship. Policies have been derived from survey and analysis (present condition and trends) from industrial statistics and related policies in advanced and developing countries. First, a policy to promote cooperation between small-sized foundry unit-streams. Second, unification of the marketing support function with a textile design and development support system. Third, the introduction of policy support-management system customized according to developmental stages (tall process${\rightarrow}$fabric production${\rightarrow}$sales${\rightarrow}$clothing production sales). Fourth, foundation of a control tower that puts these tasks in a vehicle and runs them and the division of roles with the central government. We must propel main tasks to manifest the developmental potential (develop eco-friend dyeing and processing technologies, change to the young next CEO in business environment, and grow the of knit market) of the Gyeonggi Textile Industry in a short period to present a condition where these four main policies are running.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 한국염색가공학회 2011년도 제45차 학술발표회
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• pp.45-45
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• 2011

최근 환경과 건강에 대한 관심이 증대되면서, 복합기능을 갖는 다기능성 섬유에 대한 요구가 증대되고 있는 실정이다. 일반적으로 기능성은 마이크로캡슐이나 후가공제를 이용하여 일반 섬유 제품에 적용하고 있다. 마이크로캡슐이나 후가공제가 적용된 일반 섬유제품은 일상생활 속에서의 마찰 및 세탁 등으로 인해 기능 저하가 발생된다. 이러한 문제점을 개선하기 위해 특수 방사 기술을 이용하여 다기능성을 갖는 섬유 제조 기술이 개발되고 있다. 다기능성 섬유소재 및 응용제품은 그 제조 공정성이 우수하고, 염색 가공 등의 후 공정 조건에 의해 기능성 저하를 초래하지 않고, 지속시간이 오래 유지해야하는 조건을 만족해야한다. 이러한 기능성 저하 문제를 해결하고 내구성 향상 및 기능성의 지속 시간을 오래 유지하기 위하여 복합 방사 기술을 이용하여 이형 단면 원사, Sheath-Core 단면 원사 등이 개발되고 있다. 개발된 기능성 원사의 경우 일반 원사와 다른 형태의 염색성을 보일 수 있으며, 염색 온도 및 염색 시간 등 염색 조건이 달라질 수 있다. 본 연구에서는 식물 등에서 추출한 천연 항균 유기물을 마이크로캡슐화하여 이형단면의 심부에 담지된 형태인 Sheath(Nylon: 50%)-Core(PP MB: 50%) 원사의 염색성 평가 시험을 실시하였다. 시험 방법은 Sheath-Core 원사와 일반 Nylon 원사와 염착 거동 시험을 통해 비교해 나타냈고, 염색 전 후의 물성을 비교해보았다. 또한 염색성 평가 시험을 토대로 기능성 원사의 염색 온도와 시간에 따른 색차 비교 시험을 통해 기능성 원사의 염색 조건을 선정하는 시험을 실시하였다.

• Fashion & Textile Research Journal
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• 제20권3호
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• pp.323-330
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• 2018

This study aim is to provide new coloration method by laccase-catalyzation on natural phenolic dyeing process. In this study, silk was dyed with black tea, which is one of polyphenolic dye, extracted in distilled water. The dyed samples were catalyzed by laccase as the eco-friendly mordanting process. To optimize the conditions of laccase-catalyzed coloration, conditions were varied by different mordanting methods (one-bath, two-bath), temperature and treatment time. The dye affinity in terms of the value of K/S, $L^*$, $a^*$, $b^*$, and H, V, C was measured by Computer Color Matching System (CCM, CM-2600d, Spectra Magic NX, Korea). The effect of laccase-catalyzed coloration on washing fastness was evaluated and compared with the synthetic mordant (Al, Cu, and Fe). As the result of color analysis of dyed silk, the optimum conditions of laccase-catalyzed coloration were determined to post-mordanting by one-bath at $50^{\circ}C$ for 3 hours. Under the optimum laccase-catalyzed conditions, the dyed silk was shown the color of yellowish-red. After laccase-catalyzed coloration on the dyed silk, the improvement of washing fastness was obtained compared with mordanted silk by synthetic mordant (Al, Cu, and Fe). Therefore, the present study was demonstrated that the effective enzymatic mordanting method by laccase for phenolic natural dyeing with vivid color and good fastness.