• Textile Coloration and Finishing
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• v.8 no.2
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• pp.25-34
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• 1996

Diphenyl ethanolamidophosphate(DPEAD) was synthesized for the purpose of developing a new flame retardant for cotton fabric. As the intermediate material was used diphenyl chlorophosphate(DPCP) and it was synthesized by using phosphorus oxychloride and phenol as the starting materials. The final product DPEAP was obtained by the reaction of DPCP and ethanolamine. The flame retardancy of cotton fabrics treated by DPEAP through pad-dry-cure(PDC) process was examined at various conditions. The physical property change of the DPEAP treated cotton fabrics were investigated by examining the drape stiffness, the wrinkle recovery, and the tensile strength. The results are summarized as follows: (1) DPEAP has shown excellent flame retardancy on cotton fabrics in comparison to other flame retardants for cotton fabrics available commercially. (2) The optimal condition for PDC process found was that the curing temperature was 16$0^{\circ}C$, the DPEAP concentration was 10%, the catalyst $({NH_{4})_{2}HPO_{4}$ concentration was 7.0%, and the fixing agent hexamethylol melamine (HMM)/DPEAP weight ratio was 1/8. (3) The wrinkle recovery of the processed fabrics increased with increasing DPEAP concentration. (4) The drape stiffness of the cotton fabrics treated by DPEAP have shown essentially no change until increasing DPEAP concentration to 15 %, however DPEAP concentration exceeds 20% the drape stiffness increased drastically with increasing DPEAP concentration. When DPEAP concentration is kept constant the drape stiffness increased with increasing $({NH_{4})_{2}HPO_{4}$ concentration and HMM/DPEAP weight ratio. (5) The tensile strength of the processed fabrics was lower than that of untreated fabrics, but the tensile strength retention increased with increasing DPEAP concentration.

• Korean Journal of Human Ecology
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• v.22 no.1
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• pp.131-140
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• 2013

Eco-friendly and health-functional clothing is now becoming the target of the worldwide hot trends. The purpose of this study is to develop an eco-friendly textiles to decrease environmental pollution and to be harmless for human health by investigating how the natural chorangak liquid treatment affects the changes of mechanical properties and the hand of silk fabrics according to different treatment conditions. Treatment was varied with various temperatures ($85^{\circ}C$, $90^{\circ}C$, $95^{\circ}C$) for 90 seconds after degumming. The results were as follows: 1) The natural chorangak liquid is the most effective at the ratio of glacial acid 200ml with eggshell 20g minimizing the time limit and sludge reduction. Its treatment of silk fabrics is optimized at $90^{\circ}C$ for 90 seconds with 25% conc. after degumming when considering tenacity and elongation. 2) After the treatment, tenacity and elongation of specimen are increased compared with those of degummed silk fabrics. 3) After analyzing the effect of the treatment on the characteristic values of basic mechanical properties of silk fabrics, mechanical properties (tensile, bending, shearing, compression, surface) are overall improved. The properties of thickness and weight are increased as well. 4) Based on the clear analysis on effects of the treatment on the mechanical properties and the hand of silk fabrics, the level of THV was enhanced from good to excellent. Therefore, chorangak liquid can be utilized satisfactorily as a new finishing agent for developing eco-friendly textiles.

• Textile Coloration and Finishing
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• v.21 no.2
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• pp.48-53
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• 2009

Reproduction of antique document is of importance with the concept of sharing the their contents and original aspects in terms of textual and artistic message. 'Pine tree ink stick' and 'Oil ink stick' are greatly enjoyed in their uses in the most written documentary works. Thus, it is said that the approach of this study has implied considerable meanings to cultural aspects. In this work, we have performed to investigate the reproduction and restoration study for antique documents. With comparison and analysis of some types of "ink stick", we have prepared several ink samples, controlling viscosity, surfactant, thickness agent, and applied these inks to the target antique document. Several reproduced samples showed a practical application possibility in terms of reproduction and restoration.

• Journal of the Korean Society of Clothing and Textiles
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• v.14 no.3 s.35
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• pp.216-221
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• 1990

This study was performed for the development of antimicrobial finished nonwoven fabrics with water repellency. And it was aimed to examine the changes of moisture related properties and air permeability of the finished fabrics. Viscose rayon nonwoven fabrics were treated with organic silicon quaternary ammonium salt having carbon numbers of 16, which was synthesized for this study Antimicrobial activity was evaluated by shake flask method and the reactivity of antimicrobial agent was measured by degree of luminescence from inductively coupled plasma. Water repellency of treated specimen was evaluated by dynamic water absorption measurement and air permeability was measured by Frazier method. The results obtained from this study were as follows: 1. Excellent antimicrobial activity was obtained for the high concentration of treatment and the durability of finishing after laundering was better as the treatment concentration was higher 2. Silicon contents taken up by specimen increased with increased treatment concentration. 3. Dynamic water absortion of treated specimen decreased compared to that of untreated. And, it was lowered as the treatment of concentration increased and as the silicon content increased. 4. Moistuie regain and uptake with lapse of time of treated specimen increased compared to those of untreated. But, air permeability of treated specimen decreased.

• Journal of Fashion Business
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• v.19 no.4
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• pp.183-199
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• 2015

This study aimed to systematize the apparel vendor work processes and provide useful information to future employees of clothing export units by analyzing the processes of vendors' manufacturing tasks. A survey of 20 apparel vendors servicing mainly U.S. buyers was conducted on employees of overseas business departments working for more than five years. buyers. Based on the results, vendors mainly manufactured cut-and-sew knit products. Regarding the production method, OEM was used more frequently than ODM. Fourteen (70%) companies used the ODM method. This suggests that vendors are expanding their production method from OEM to ODM. In order to summarize the work of each business based on the clothing production process research results, buyers were in charge of planning products and the vendors were in charge of sampling. Production of materials and the approval of material tests were out sourced. Overseas factories of vendors were in charge of bulk (mass) production and garment finishing, as well as packaging and shipping the completed products. Even though the vendors' head offices do not directly produce clothes, they play a pivotal role in ensuring planning and management progress in clothing production. As buyers prefer direct contracts for cost reduction, the vendor additionally performs the role of an agent. Also, with the increase in ODM production ratio, the work area of the vendor is expanding. If Korean clothing exporters improve their global competitiveness by investing in the R&D of materials and design to enhance the ODM method, the development of Korea's clothing and export industry will benefit significantly.

• Textile Coloration and Finishing
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• v.8 no.1
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• pp.1-7
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• 1996

In discharge printing of cotton fabrics dyed with C.I. Reactive Orange 16(O-16), C.I. Reactive Blue 19(B-19) and C.I. Reactive Black 5(Bl-5), when the dyes were discharged by some chemicals, such as $K_{2}CO_{3}$, BASB, DSR, sarcosine and GSB, the single use of those chemicals made a very poor discharge, but mixing them with $K_{2}CO_{3}$ resulted to the outstanding improvement of discharge. Especially the dischargeability of $K_{2}CO_{3}$ BASB or $K_{2}CO_{3}$+DSR was very gratifying. For O―16, $K_{2}CO_{3}$+ DSR was slightly more effective than $K_{2}$CO$_{3}$+BASB, but for B―19 and Bl―5 $K_{2}CO_{3}$+BASB and $K_{2}CO_{3}$+DSR showed similar good results. In discharging of O―16 and B―19 by $K_{2}CO_{3}$+BASB or $K_{2}CO_{3}$ +DSR, the dischargeabilities of them increased as the time of 102$^{\circ}C$ steaming increased under the condition of 102$^{\circ}C$ steaming and no baking, but not under the condition of 102$^{\circ}C$ steaming and 16$0^{\circ}C$ baking. However for Bl-5, without regard to baking, the 102$^{\circ}C$ steaming of more than 15 minutes caused the discharge to be much more remarkable than that of 8 minutes did. Generally baking elevated the dischargeability, and this was sure in discharging by $K_{2}CO_{3}$+BASB or $K_{2}CO_{3}$+DSR. And it was confirmed that the structure of vinylsulfonyl reactive dyes could effect on the dischargeability because the three dyes, though little, showed different discharge behaviors.

• Textile Coloration and Finishing
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• v.21 no.1
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• pp.30-37
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• 2009

Studies on plants such as lotus leaf suggested that dual-scale structure could contribute to super-hydrophobicity. We introduced super-hydrophobicity onto poly(ethylene terephthalate)(PET) fabric with dual-scale structure by assembling $TiO_2$ nano sol. PET fabric was treated with $TiO_2$ sol, water-repellent agent using various parameters such as particle size, concentration. Morphological changes by particle size were observed using field emmission scanning electron microscopy(FE-SEM) and AFM measurement, contact angle measurement equipment. The contact angle of water was about 138.5$^{\circ}$, 125.8$^{\circ}$, 125.5$^{\circ}$ and 108.9$^{\circ}$ for PET fabric coated with 60.2nm, 120.1nm, 200nm and 410.5nm $TiO_2$ particles, compared with about 111.5$^{\circ}$ for PET fabric coated with water repellent. When we mixed particle sizes of 60.2nm and 120.1nm by 7:3 volume ratio, the contact angle of water was about 132.5$^{\circ}$. And we mixed particle sizes of 60.2nm and 200nm by 7:3 volume ratio, the contact angle of water was about 141.8$^{\circ}$. Also we mixed particle sizes of 60.2nm and 410.5nm by 7:3 volume ratio, the best super-hydrophobicity was obtained. In this paper, we fabricated various surface structures to the water-repellent surfaces by using four types of $TiO_2$ nano-particles, and we found that the nanoscale structure was very important for the super-hydrophobicity.

• Textile Coloration and Finishing
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• v.18 no.6 s.91
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• pp.16-24
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• 2006

The purpose of this study is to improve the defects of chitosan crosslinked viscose rayon by ECH and to describe the change of hand of chitosan crosslinked viscose rayon fabrics. The chitosan crosslinked viscose rayon were manufactured by crosslinking process using ECH as crosslinking agent, 2 wt% aqueous acetic acid as a solvent of chitosan and ECH, and 20 wt% aqueous sodium hydroxide as crosslinking catalyst. Viscose rayon were first immersed in the pad bath of the mixed solution of chitosan and ECH, padded up to 100 wt% wet pick-up on weight of fiber(owf), precured on pin frames at $130^{\circ}C$ for 2 minutes, immersed in NaOH solution and finally wash and dry. Antimicrobial properties of the viscose rayon treated with chitosan were measured by the shake flask C.T.M. 0923 test method with staphylococcus aureus(ATCC 6538) as the microorganism. When the concentration of chitosan was increased chitosan crosslinked viscose rayon's LT, WT, B, 2HB and MIU were increased and G, 2HG, SMD, T and $T_m$ were decreased. On the other hand, WT, EM were decreased and RT was increased at $1{\times}10^{-2}M$ ECH. The optimum condition for crosslinking was that ECH concentration was between $1{\times}10^{-2}M\;and\;5{\times}10^{-2}M$. Antimicrobial effects of rayon fabric treated with chitosan was excellent.

• Textile Coloration and Finishing
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• v.33 no.2
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• pp.72-78
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• 2021

The purpose of this study, the purpose of this study is to activate the antibacterial effect on the Chlorinated polyvinyl chloride film by using Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride antibacterial agent with Chlorinated polyvinyl chloride polymer, which is inexpensive and has excellent properties such as heat resistance and chemical resistance. The Chlorinated polyvinyl chloride polymer was dissolved in a dimethylacetamide solvent, and film samples were prepared by varying the ratio of Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride to study the antibacterial performance. A Scanning Electron Microscope-Energy Dispersive X-ray Spectrometer and X-ray photoelectron spectroscopy were employed to confirm the elements in the samples. According to the initial decomposition temperature of the Chlorinated polyvinyl chloride film and the Chlorinated polyvinyl chloride/Octadecyldimet hyl (3-triethoxy silylpropyl) ammonium chloride(10%) film using a Thermogravimetric analyzer(TA-DTA), it was confirmed that the initial decomposition temperature was lowered due to the influence of Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride. In addition, in order to measure the mechanical properties, Universal testing machine was used and the result showed that a strength of Chlorinated polyvinyl chloride/Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride(10%) was 36.8 MPa. The antimicrobial properties of the Chlorinated polyvinyl chloride/Octadecyldimethyl (3-triethoxy silylpropyl) ammonium chloride(10%) film showed 99.9% antimicrobial properties.

• Korean Journal of Materials Research
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• v.29 no.11
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• pp.690-696
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• 2019

Geopolymer is an alumina silicate-based ceramic material that has good heat-resistance and fire-resistance; it can be cured at room temperature, and thus its manufacturing process is simple. Geopolymer can be used as a reinforcement or floor finish for high-speed curing applications. In this manuscript, we investigate a high-speed curing geopolymer achieved by adding calcium to augment the curing rate. Metakaolin is used as the main raw material, and aqueous solutions of KOH and $K_2SiO_3$ are used as the activators. As a result of optimizing the high bending strength as a target factor for geopolymers with $SiO_2/Al_2O_3$ ratio of 4.1 ~ 4.8, the optimum ranges of the active agent are found to be $0.1{\leq}K_2O/SiO_2{\leq}0.4$ and $10{\leq}H_2O/K_2O{\leq}32.5$, and the optimum range of the curing accelerator is found to be $$0.82{\leq_-}Ca(OH)_2/Al_2O_3{\leq_-}2.87$$. The maximum flexural strength is found to be 1.35 MPa at $Ca(OH)_2/Al_2O_3=2.82$, $K_2O/SiO_2=0.3$, and $H_2O/K_2O=11.3$. The physical and thermal properties are analyzed to validate the applicability of these materials as industrial insulating parts or repairing finishing materials in construction.