Draft Zone에서 혼방섬유의 운동상태와 불균제에 대한 연구

장석윤 한국섬유공학회 1967 한국섬유공학회지 Vol.4 No.1

纖維長이 틀리는 2種의 纖維를 混紡하되 長纖維는 等長纖維를 擇하고 짧은 纖維는 不等長纖維를 擇하여 混紡할 때 Draft Zone의 ratch를 長纖維便에 맞추어 놓고 不等長纖維만 浮遊纖維가 되게하여 이들이 Draft Zone 內에서의 纖維先端密度를 나타내고 Forster의 Sub-roving의 槪念에 立脚해서 Draft Zone 內에서의 Sub-roving의 平均速度를 計算했고 Draft Zone 內에서 纖維가 이러한 값에 따르지 않을 때 Irregularity가 커지는 것으로 究明했다. 또 Draft Zone 內에서의 纖維相互間의 接觸狀態를 推論하고 이들의 接觸狀態는 餘他條件이 變化하지 않는 限纖維相互間의 摩擦에 依해서만 決定지워 진다고 推論하고 Draft Zone에서 纖維相互間의 接觸狀態는 의 關係가 파괴 될 때 Irregularity는 增加하며 이 關係는 纖維相互間의 마찰에 依해서 變化한다는 것을 推論하고 이것들을 實驗的으로 確認했다.

권축섬유의 하중-신장 거동

양철곤,원천화구 한국섬유공학회 1983 한국섬유공학회지 Vol.20 No.6

본 연구는 권축섬유의 하중-신장거동에 대한 이론적인 검토와 그 결과를 기존의 방법으로는 측정하기 어려웠던 가는 섬유의 강성도를 외팔보법(cantilever method)에 의하여 측정함으로서 실험적으로 확인하여 보았다. 섬유에 주어지는 권축형태가 다양하지만 유형별로 크게 분류할 때 싸인곡선 형태와 나선형태로 분류될 수 있으므로 두 형태로 구분하여 이론적으로 검토하여 보았으며, 실험에서는 폴리에스테르계섬유(2d, 3d) 싸인곡선 형태에, 잡종양모(56's)는 나선형태에 각각 적용시켜 검토하였다. 실험 결과로부터 권축섬유의 하중-신장에 있어 초기영역에서는 이론곡선과 실험 결과가 대체적으로 잘 부합되고 있음을 확인하였으며, 또한 단섬유의 강성도 측정에서 외팔보법을 이용하면 이형단면 섬유의 정확한 굽힘강성 측정을 손쉽게 할 수 있다는 결과로 이해되었다. The theoretical load-extension behaviour of crimped fiber was studied on the basis of experimental results. The crimped forms of samples were assumed sinusoidal for polyester staple fiber and helical for cross-bred wool fiber, respectively. Flexuarl rigidity of fiber which was one the important factors in load-extension behaviour was measure by canilever system apparatus developed by authors. It is shown that by putting the value of flexural rigdity(G) into derived formulas, the load-extension behaviour of a crimped fiber can be predicted precisely in the initial uncrimping region.

키토산 가공직물의 공기투과도에 관한 연구

전동원,이현주 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6

The chitosan treatment of fabric involves dipping in highly viscous chitosan solution. One of the anticipated drawbacks of the dipping of the fabric samples in highly viscous chitosan solution would be poor air permeability by clogging the pore structures of the sample. There have been no quantitative studies on the changes of air permeability with the treatment conditions. In this study, the effect of molecular weight of chitosan on the air permeability and the effect of chemical nature of fiber materials comprising fabric samples were investigated. Image processing techniques were employed for accurate evaluation of the pore area and the pore size distribution of the fabrics, which could explain the change of air permeability of the chitosan treated fabric samples. The results can be summarized as follows : 1) Chitosan treatment of the fabrics composed of the cellulosic, silk, and wool fibers increased the air permeability, whereas chitosan treatment did not change appreciably the air permeability of PET, nylon, and acrylic fabric samples. 2) High molecular weight chitosan was more effective in improving air permeability than low molecular weight chitosan for the fabrics composed of natural fibers. 3) As chitosan treatment not increases the crispness of the fabric but also improves air permeability for some fabrics, it is a recommendable treatment for fabrics requiring cool touch.

영구유연발수제에 관한 연구(제2보) -1,2-Disubstituted Imidazoline 화합물의 합성-

심정변,박홍수,홍성일,Sim, Jeong-Byeon,Park, Hong-Su,Hong, Seong-Il 한국섬유공학회 1975 한국섬유공학회지 Vol.12 No.3

1,2-Disubstituted imidazoline, such as 1-stearoly aminoethyl-2- heptadecyl imidazoline (SHI), 1-stearoyl dis (aminoethyl)-2- heptadecyl imidazoline(SDI) and 1-stearoyl tris (aminoethyl) -2-heptadecyl imidazoline(STI) were synthesized from stearic acid with polyalkylene polyamine, and then water-soluble 1,2-disubstituted imidazolinium salts, such as 1-stearoyl aminoethyl-1-glycidyl -2-heptadecyl imidazolinium chloride(SHIC), 1-stearoyl dis(aminoethyl)-1-glycidyl-2-heptadecyl imidazolinium chloride(STIC), 1-stearoyl aminoethyl-2-heptadecyl imidazolinium chloride(SAIC) and 1-stearoyl aminoethyl-1-benzyl-2-heptadecyl imidazolinium chloride(SBIC) were obtained by alkylating 1,2-disubstituted imidazoline with epichlorohydrin, hydrochloric acid and benzyl chloride. It was found that SHIC, SDIC and STIC could be used as the durable softening and water-repellenting agent, from the results of the measurements of the water repellency of fabrics treated with SHIC, SDIC, STIC, SAIC and SBIC. The structures of these compounds were also determined by elemental analyses and IR spectra.

삼차원 어패럴 캐드 시스템 개발을 위한 의복 패턴 자동 제도에 관한 연구

김성민,강태진 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6

An automatic garment pattern generation system was developed for the application to a three dimensional apparel CAD system. The traditional garment production method depends mostly on the flat pattern process except for some bespoke garment. To make a garment, a skilled patterner gathers the anthropometric data from selected people and draws predefined basic patterns based on them. The drafted patterns are sewn into a garment preform to be tried on the human body and adjusted until satisfactory fitting is achieved, which may take considerable time because the evaluation of fitting tends to depend on subjective feelings. Such complicated processes require high skill and therefore raise the overall production cost, moreover, the lengthy development period can result in loss of the competitiveness of the manufacturer by dissatisfying the current needs of demand activated manufacturing. To make such processes more efficient, we used effective computer technologies. In this study, we developed an automatic pattern generation method using three dimensional measurements of the human body and a garment model. The shape of the garment model is adjusted to fit the body and subsequently flattened into two dimensional patterns considering the properties of the fabric to be used.

폴리에틸렌 테레프탈레이트와 폴리트리메틸렌 테레프탈레이트의 공중합체 합성과 특성 분석(I) - 중합조건의 영향 -

박양호,노석균,김준호 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.7

Random copolyesters were prepared from poly (ethylene terephtalate) (PET) oligomer and 1,3-propanediol (PG) by polycondensation procedure using varying amounts of PET oligomer and PG. Copolymer compositions have been identified by $^1$H-NMR spectroscopy. The compositions of the copolymers can be conveniently controlled by manipulation of the reaction conditions. Three hour polymerization at 26$0^{\circ}C$ generated the copolymers with the highest intrinsic viscosity. Investigation of the thermal properties of the obtained polymers via DSC showed that the copolyester became completely amorphous when the composition of PG ranged from 30 to 65%. Sequence information of the produced copolyesters were obtained from $^{13}C$-NMR analysis. The ET-TP-ET and TT-TP-TT blocks could be distinguished from the unsymmetrical diester sequence ET-TP-TT. The sequence analysis indicates that all the studied copolymers have randomly distributed sequence structure.

Chito-oligosaccharide로 처리된 면직물의 반응성 염료에 대한 염색성

장진호,신민승,성하수,고석원 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6

Large amount of salt and alkali is usually added to dyebath in the conventional reactive dyeing of cotton due to the low substantivity of reactive dyes to cotton, hence resulting in high discharge levels of dyes as well as salt and alkali. This study intends to increase the interaction between the dye and cellulose fiber by incorporating amine groups to the fiber using a chito-oligosacchride (COS). The COS was prepared by depolymerizing a chitosan, whose degree of deacetylation is 99.3%, with sodium nitrite. With increasing COS content in the cotton fabric, the amount of salt and alkali required for the dyeing was reduced significantly and at the same time higher K/S value was obtained compared with the untreated. Also the color fastness of COS treated cotton fabric were similar to those of the untreated fabrics.

증열과 베이킹의 2단계 고착조건이 반응/반응염료에 의한 면직물의 알칼리 발염에 미치는 영향

박건용,박창혁 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.6

When cotton fabrics dyed with C. I. Reactive Black 5 were discharged by the two-step fixation of steaming at 102$^{\circ}C$ and baking at 170~19$0^{\circ}C$ using the discharge agents of $K_2$CO$_3$and BASB (50%), baking for 3 min or more distinctly improved the white dischargeability while increasing the temperature of baking did slightly. In this case overall white dischargeability was unsatisfactory. On the other hand, baking at 160~18$0^{\circ}C$ after steaming at 12$0^{\circ}C$ greatly improved the white dischargeability compared with steaming at 102$^{\circ}C$, and almost complete white discharge was accomplished by baking for 3 min at 18$0^{\circ}C$ after steaming for 8 min at 12$0^{\circ}C$. Thus, in order to obtain satisfactory discharge results, increasing the temperature of steaming to 12$0^{\circ}C$ is much more effective than increasing that of baking to 19$0^{\circ}C$. White dischargeability increased with increasing amounts of urea, while the amount of dischange agent did not have a significant effect. In colored discharge printing, the excellent colored discharge results were achieved by steaming at 12$0^{\circ}C$ and baking at 160~18$0^{\circ}C$, while the insufficient discharge due to steaming at 102$^{\circ}C$ resulted in lower values of lightness and chroma. Compared with the case of white discharge, both the discharge of ground color and the fixation of color can be enhanced by increasing the amount of $K_2$CO$_3$/BASB to 140/140 (g/kg), but only the discharge of ground color was enhanced by increasing the concentration of urea to 130 g/kg.

건축용 복합 부직포의 통기성에 관한 연구

전한용,장경호 한국섬유공학회 1998 한국섬유공학회지 Vol.35 No.6

Composite nonwovens were made by thermal bonding method to examine the validity as the construction materials from needle punched and spunbonded nonwovens. The effects of air permeability, number of layers, porosity and pore size on bonding temperatures were investigated. The air permeability of composite nonwovens was varied with the bonding temperatures. The variation of air permeability was dependent on the nonwoven to have more lower air permeability for 2-layer composite nonwovens. Air permeability of composite nonwovens was influenced by the number of layer. In case of the same weight for multi-layered nonwovens, air permeability coefficients were dependent on the porosity and thickness of nonwovens rather than the weight of nonwovens. Finally, the variation of air permeability of composite nonwovens by puncturing was dependent on the pore size rather than the number of puncture.

열유동을 고려한 가호기 건조시스템의 최적 설계 -가호사의 건조 특성 연구-

김태홍,배철호,Kim, TaeHong,Bai, CheolHo 한국섬유공학회 1998 한국섬유공학회지 Vol.35 No.6

During the drying process of sized yarn, the film of sizing agent begins to form from the outpost side of the sized yarn. When the film of sizing agent has formed, drying rate decreases rapidly. In the constant drying rate region, drying rate can be obtained theoretically from the energy balance. Drying rate in the falling-drying-rate region, however, depends on the mass fraction of water at the plastic paste surface and therefore is obtained through the experiments. Predictions of drying rate using the developed empirical correlation show good agreement with the experimental results.