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.

산성/캐티온 혼합염료 용액에서의 양모 및 아크릴 섬유의 계면동전위와 염색성(II) -산성/캐티온 혼합염료 염액의 성질-

김삼수,김성동,김노수,고석원 한국섬유공학회 1992 한국섬유공학회지 Vol.29 No.9

In the dyebath consisting of acid- and cationic-dyes, properties of the dye solution and behavior of a non-ionic dispersing agent were investigated by the measurements of particle size of the dye aggregates and absorption spectra. Acid dyes and cationic dyes in the solution without non-ionic dispersing agent were precipitated a lot. As the non-ionic dispersing agent increased, the degree of precipitation was highly decreased. The effect of adding non-ionic dispersing agent in the dye bath was also investigated. The non-ionic dispersing agent made complex with acid dye, but not with cationic dye.

Dry-jet Wet spinning에 의한 키토산 섬유의 형성기구 및 특성

이신희 한국섬유공학회 2000 한국섬유공학회지 Vol.37 No.7

A study has been made on the dry-jet wet spinning of chitosan fibers using 5% acetic acid as solvent and 5%, 10% aqueous sodium hydroxide as non-solvent. The technological characteristics of dry-jet wet spinning of chitosan fibers lie in the fact that small streams of dope extruded from the die are allowed to pass first through a short distance of air gap(0∼ 50 cm) before entering the spinning bath for full coagulation. This work showed the importances of air gap length and jet stretch ratio, and fiber tenacity up to 2.11% g/d could be obtained with elongation of 8∼13%. Deacetylation was readily achieved, and the extent of deacetylation was characterized by various techniques, including weight gain and elemental analysis. Individual fibers were evaluated on the basis of moisture content, swelling ratio, surface morphology, mechanical properties(tenacity, elongation, and work to rupture etc.), and fiber diameter. The fibers by this route were compared with those produced by wet spinning of chitosan.

임계농도 응고욕을 이용한 아크릴 섬유의 형성과 물성에 관한 연구(III)-임계농도 응고욕 조건이 섬유의 구조 및 물성에 미치는 영향-

최성민,문규열,조현혹,이장우,죽전홍 한국섬유공학회 1992 한국섬유공학회지 Vol.29 No.7

From the previous studies performed on the Polyacrylonitrile(PAN)/HNO₃(soIvent)/H₂0(nonsolvent) spinning system based on the critical coagulation bath composition(CCBC),it has been found that the bath composition(CBC) has markedly affected the structure and properties of the resulting fibers, and furthermore that fibers obtained from the higher CBC's than the CCBC had better structure and properties compared to the case of the lower CBC's as a result nf retarded phase transitions at higher CBC's Hence, in this paper, the effects of the CBC around the CCBC on structure and mechanical properties of drawn PAN fibers formed have been investigated by varying the draw ratio. Namely, such physical properties as density, dyeing absorption, birefringence, dynamic viscoelas tic behavior, wide angle X-ray diffraction, degree of orientation, and specific stress have been measured on drawn fibers spun at two different coagulation conditions, i.e. CBC = 35 and 41.8% corresponding to before and after the CCBC, respectively.

Graft견의 물리적 성질

박연흠 한국섬유공학회 1983 한국섬유공학회지 Vol.20 No.2

견의 graft 중합에 대해서는 많은 논문들이 발표되었지만, graft중합된 견의 성질에 대하여 자세히 연구한 결과는 그렇게 많지가 않다. 그래서 보고자는 견의 형태로는 직물, 실, 섬유, graft중합 방법으로는 방사선을 이용하는 방법, 개시제를 이용하는 방법, 그리고 사용되는 단량체로서는 styrene, methylmethacrylate(MMA), acrylamide, acryl 산 methyl(MA), acryltks ethyl(EA), acryl 산 buthyl(nㆍBA)등에 의하여 따로따로 분리해서 정리하지 않고, 이들 성분에 대해 물리적 성질을 신도, 흡기율, Young률, stiffness(강연도, 굴곡강성률 포함), 밀도, 주름회복율등으로 항목을 분리해서 보고하고자 한다.(중략)

합성섬유의 내구성 친수화 가공에 관한 연구(II) - $\varepsilon$-Caprolactam-blocked PEG-TDI Prepolymer에 의한 합성 섬유의 내구성 친수화 가공-

김갑진,오창운,윤병숙,Kim,,Gap-Jin,O,,Chang-Un,Yun,,Byeong-Suk 한국섬유공학회 1984 한국섬유공학회지 Vol.21 No.6

This study is related to the hydrophilic finishing of synthetic fiber with ε-caprolactamblocked PEG-TDI and ε-caprolactam-blocked PEG-TDI prepolymer were synthesized and its thermal properties were investigated with IR spectroscopy, DSC and TGA. ε-Caprolactam-blocked TDI, the model compound of ε-caprolactam-blocked PEG-TDI, was dissociated to ε-caprolactam and TDI at two different temperature i.e. 148.5℃ and 152.5℃ under the atmosphere, and the dissociation temperature of ε-caprolactam-blocked PEG-TDI prepolymer to isocyanate-terminated PEG-TDI prepolymer and ε-caprolactam was suggested to be the same as that of ε-caprolactam-blocked TDI from the IR spectroscopy. Polyester fabric was padded with aqueous mixture of εcaprolactam-blocked PEG-TDI prepolymer and crosslinking agent such as N,N,N',N',-tetrakis (2-hydroxy propyl) ethylene diamine trimethylol propane and trienthanol amine, dried, and cured at 175℃, higher than the temperature of dissociation. This finished polyester fabric showed very low frictional electrostatic charge, short halflife, good wicking and soil releasing properties and these properties were durable to laundering.

프탈이미드계 고수세성 아조 분산염료의 합성과 셀룰로스 아세테이트 섬유에 대한 염색성 연구

이은교,김경학,윤상현,오나현,김상천,고준석 한국섬유공학회 2020 한국섬유공학회지 Vol.57 No.3

In disperse dyeing of polyester fibers, reduction clearing is conducted to improve the wet fastness of the dyed material. However, in the case of disperse dyeing of cellulose diacetate fabrics, when reduction clearing is conducted, the acetyl groups in cellulose acetate fibers may be alkali-hydrolyzed, which leads to a deterioration of their characteristic properties. Therefore, the dyed acetate fabrics are usually after-treated with a soaping agent at a relatively low temperature for better wet fastness, although it fails to meet the customer demands. In this study, high-washable phthalimide-based azo disperse dyes were synthesized, and their dyeing and fastness properties on cellulose diacetate fabrics were investigated. In particular, conventional 4-aminoazobenzene dyes containing a nitro group at the 4-position were synthesized to compare their fastness properties on cellulose acetate with those of phthalimide-based azo disperse dyes.

연신과 열처리에 따른 폴리(트리메틸렌 테레프탈레이트) 섬유의 동적 기계적 거동 변화

오필록,김갑진,김영호 한국섬유공학회 1999 한국섬유공학회지 Vol.36 No.2

Effects of drawing and annealing on dynamic mechanical properties of poly(trimethylene terephthalate)(PTMT) fibers were investigated. PTMT obtained via polycondensation reaction of 1,3-propanediol and terephthalic acid was spun on a pilot scale extruder at the spinning speed of 1000m/min (UDY-1) and drawn to various draw ratios. It was also spun on a laboratory scale extruder at the spinning speed of 143m/min (UDY-2) and subsequently annealed at a temperature between 6$0^{\circ}C$ and 18$0^{\circ}C$ for 1 hour. Dynamic mechanical properties of these PTMT fibers were studied using dynamic mechanical analyzer(DMA). It was found that the glass transition temperature ($\alpha$-relaxation) of UDY-1 determined by loss modulus is about 45$^{\circ}C$ and increases with increasing draw ratio. The glass transition temperature of UDY-2 was about 43$^{\circ}C$ and it increased up to the annealing temperature of 10$0^{\circ}C$ and then decreased. The apparent activation energy of $\alpha$-relaxation of PTMT fiber was determined to be about 342~396 kJ/mol which was lower than that of crystalline unoriented PET (ca. about 520kJ/mol). This suggests that the molecular chain of PTMT has lower energy barrier than that of PET and therefore the glass transition temperature of PTMT is lower than that of PET.

NMMO/물 용매계에서 셀룰로스/N-(2-하이드록시)프로필-3-트리메틸암모늄 키토산 클로라이드 블렌드 섬유의 제조

남창우,고석원,최재원,김영호 한국섬유공학회 2003 한국섬유공학회지 Vol.40 No.6

Cellulose and N-(2-hydroxy)propyl-3-trimethylammonium chitosan chloride (HTCC), a water-soluble chitosan derivative synthesized by the reaction of chitosan and glycidyltrimethylammonium chloride, were blended in solution and the method to prepare blend fibers using them was investigated. Various blend solutions with different HTCC contents (up to 20%) were prepared using 50% N-methylmorpholine-N-oxide (NMMO) aqueous solution as a co-solvent and the cellulose/HTCC blend fibers were obtained via dry-jet/wet spinning process. Some of quaternary ammonium groups in HTCC were lost and converted to primary amino groups during the dissolution and spinning process. The blend solution was brownish and transparent and no phase separation was observed. Moreover, SEM showed that HTCC component was distributed uniformly in cellulose. The blend fibers showed excellent antimicrobial activity even at very low content (1.0%) of HTCC.