거품을 이용한 면직물의 듀어러블 프레스 가공(II) -가공효과를 중심으로-

배기서,이정민,이철호,Bae, Gi-Seo,Lee, Jeong-Min,Lee, Cheol-Ho 한국섬유공학회 1988 한국섬유공학회지 Vol.25 No.6

Durable press finishing of cotton fabrics by conventional pad-dry-cure and foam finishing techniques were compared. The balance of textile performance properties and the distribution of crosslinks throughout fabric were studied. the resin add-on, nitrogen content, DP rating, wrinkle recovery, selected physical properties, and amount of free formaldehyde were measured, and the crosslink uniformity was measured with a negative staining technique. Optimum performance was obtained at a wet pickup level of about 30%. At equivalent dry add-on, the physical properties and crosslink uniformity of the foam finished fabrics were better than those of the fabrics finished by the conventional process.

거품가공법을 이용한 의료용 부직포의 기능화 (II)-스펀레이스 부직포의 방혈.투습방수가공 효과-

배기서,이정민 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.7

Spunlaced nonwovens for medical use were finished for blood repellency, moisture transpiration, water resistance and abrasion resistance with fluorochemicals and polyrethane foam coating agent utilizing foam finishing technology(yen) and conventional padding application techniques. We could know that foaming efficiency of fluorochemicals was better as the order of FC-232> AG-730> Z-6700> AG-310) EM-11) AG-468> 519Z. Excellent water-oil-saline-alcohol repellency values, suitable water impact penetration values and water vapour permeability values were obtained with both techniques but showed low water entry pressure values for water resistance. The abrasion resistance properties of foam finishing spunlaced nonwovens were superior to those of the same spunlaced nonwovens finished conventionally.

폴리카프로아미드 및 폴리에틸렌-테레프탈레이트의 젖음에 관한 계면현상의 해석

배기서,송주호 한국섬유공학회 1986 한국섬유공학회지 Vol.23 No.1

The wettabilities of poly(caproamide)(PCA) and poly(ethylene terephthalat)(PET) were investigated in terms of the heat of wetting and the contact angle. In the range of temperatures between 20$^{\circ}C$ and 70$^{\circ}C$, the heat of wetting was measured using an adiabatic calorimeter, and the advancing contact angle was determined by means of a vertical plate method. The following results were obtained 1) For PET in water, both of the heat of wetting and the advancing contact angle slightly decreased with increase of temperature. The temperature coefficient of the contact angle was obtained to be about -0.13deg/$^{\circ}C$. The two transition temperatures for PET were found at around 25$^{\circ}C$ and 70$^{\circ}C$, respectively. 2) The heat of wetting could be calculated from the temperature coeficient values of the contact angle. The calculated values at 20$^{\circ}C$ were about 51 erg/$\textrm{cm}^2$ for PCA and about 13 erg/$\textrm{cm}^2$ for PET, respectively. 3) The heat of wetting of PCA in water-ethanol mixture was higher than that of PET. For PCA, the heat of wetting increased as the surface tension of liquid increased. On the other hand, for PET, the value slightly decreased to the minimum, and then gradually increased. 4) It was confirmed that the structural properties of fiber can be at least partially estimated by measuring the contact angle and the heat of wetting.

Nylon 6 섬유의 습윤성에 관한 연구

배기서,모상영 한국섬유공학회 1984 한국섬유공학회지 Vol.21 No.6

The wettabilities of nylon 6 fiber were investigated in terms of the heat of wetting and the contact angle. The heat of wetting of nylon 6 fiber in water was measured at the range of 2$0^{\circ}C$ to 7$0^{\circ}C$, using an adiabatic calorimeter, and the advancing contact angle was measured using a vertical plate method. The following results were obtained. 1) The heat of wetting and the advancing contact angle of nylon 6 fiber in water decreased as the temperature increased. The curve breaking was observed at around 38$^{\circ}C$, which was considered the transition temperature of nylon 6 fiber. The temperature coefficient of the contact angle showed negative value of about 0.31 deg./$^{\circ}C$. 2) The heat of wetting and contact angle of nylon 6 fiber increased as the surface tension of water-ethanol mixture increased. 3) The heat of wetting of nylon 6 fiber treated with antistatic agents slightly decreased compared with untreated fiber.

거품을 이용한 면직물의 듀어러블 프레스가공(I) -거품의 생성조건을 중심으로-

배기서,이정민,이철호,Bae, Gi-Seo,Lee, Jeong-Min,Lee, Cheol-Ho 한국섬유공학회 1987 한국섬유공학회지 Vol.24 No.6

The foaming efficiency of various solutions and properties of generated foam such as blow ratio, foam density, drainage, foam speed, bubble size and size distribution in durable press finishing using foam were studied. The foam generator of experimental scale was specially designed and prepared by the application of turbine agitator manufacturing technique. DMDHEU as a crosslinking agent, polyethylen emulsion as a softener, sodium lauryl sulfate as a foaming agent and hydroxyethyl cellulose as a stabilizer were used. The available size and size distribution of the bubbles were obtained in this device.

전해수를 이용한 견섬유 정련 및 세리신 회수 (I)

배기서,하헌주,박광수 한국염색가공학회 2002 韓國染色加工學會誌 Vol.14 No.4

Natural silk is formed by two proteins : the crystalline fibroin (inside the silk thread) and amorphous sericin (as a tube outside the thread). The degumming process is used to eliminate the external sericin prior to dyeing ; generally it makes use of soaps at about pH 10. Sericin is the protein constituent that "gums"together the fibroin filaments of cocoon silk. It constitutes about 25% of the weight of the cocoon, is soluble in hot water and "gels" on cooling. The removal of sericin from raw silk, known as degumming, is a simple but important process usually employing hot dilute soap or alkaline solution and occasionally dilute acids or enzymic methods. During degumming, alkali is taken up by the sericin and the free acid from the soap is formed ; this may be deposited on the fiber, reducing the rate of degumming and protecting it from hydrolysis. Alkali is often added to maintain or restore the pH of the baths, but it is rarely used alone, since it leaves the silk rather harsh in handle. If complete sericin removal is required as for printing, sodium carbonate may be added. If the pH of the bath exceeds 11, the fibroin is attacked. Recently, According to the development of electrolysis, we can be obtained the electrolytic reduction water(above pH 11.5) and electrolytic oxidation water (below pH 3). The aim of this work was to study a degumming process using electrolytic water and a possibility of sericin recovery. The new degumming process used electrolytic water operates at $95^\circ{C}$ for 2hr. without any reagents. The wastewater of this process are formed by a solution of sericin in water. This conditions suggest the study of a possible recovery of this protein (sericin) which has an amino acid composition suitable for many used in cosmetics, textile finishing agents, animal feeding, etc. The degumming process using electrolytic water is available to reduce treatment costs and pollute and at the same time to recover sericin.

투과기화법에 의한 셀룰로오스계 분리막의 물/알코올 혼합물의 분리

배기서,이정민 한국섬유공학회 1991 한국섬유공학회지 Vol.28 No.5

The pervaporation technique is potentially useful in fields where distillation technique are difficult, such as fractionation of close-boiling components, ageotropic mixtures, or isomeric mixtures. The pervaporation apparatus consisted of pervaporation cell made of stainless steel, a circulation pump to agitate the feed, traps cooled by liquid nitrogen to condense the permeate, and a vacuum line. The separation analysis was carried out with a Philips 4550 Gas chromatograph. It is the purpose of this study to investigate the permeation and separation characteristic of the homologeous series of linear alcohol through cellulose, cellulose acetate and carboxymethyl cellulose membranes. Factors affecting these characteristics, such as the physicochemical nature of the permeats, polymer morphology, concentration of alcohols, temperature, and mechanical properties, were discussed.

CMC/PVA 복합막에 의한 유기용제l물 혼합액의 투과증발분리

배기서,홍영기 한국섬유공학회 1995 한국섬유공학회지 Vol.32 No.11

The purpose of this study is to develop new composite membrane which has hi선 selectivity and acceptable permeation rates for separating the organic solvent-water mixture systems by pervaporation technique. Therefore, CMC and PVA, which are highly absorbent polymeric materials, were used to prepare the composite membrane. A 2∼3wt% aqueous ChIC solution and a 7∼10wt% aqueous PVA solution were mixed together to from a homogeneous blended solution. The composite membrane was prepared by casting a polymer solution on the nonwoven fabric and then removing the solvent. The thickness of the active layer of CMC/PVA composite membrane was about 20∼30wt The experimental results indicated that the composite membrane obtained from the CUC/PVA was very effective for a selective separation of water from aqueous organic solution by Pervaporation technique. The composite membrane showed very stable permeation and separation characteristics in the experimental temperature range. The activation energies for pervaporation were 27.85(25.95), 34.20(29.68), and 35.59(39.11) kl/mole for the 75, 85, and 90wt% ethanol(acetic acid) concentrations, respectively. The permeation rates of the membrane for the water-organic solvent mixture systems at 60'S were in the range 0.1∼1.4kg/m2/hr and the separation factor was between 12 and 1925. The best pervaporation performance, the highest value of PSI, was 0.36kg/m2/hr for an aqueous 90wt% ethanol at 60℃.

Nylon 6 纖維의 浸漬熱에 관한 硏究

裵基瑞 慶北工業專門大學 1983 論文集 Vol.20 No.-

The heat of wetting is the heat evolved when a specimen of the material at a given regain, whose dry mass is one gramme, is completely wetted. It is expressed in calories per gramme of dry material, and is almost always given in terms of absorption of the liquid. An adiabatic calorimeter was used to measure the heat of wetting of nylon 6 fibers. The heat of wetting of nylon 6 fibers in water was measured at different temperatures between 20℃ and 70℃ by breaking a vaccum-sealed glass ampoule containing a known wight of dry mylon 6 fibers in the liquid in a calorimeter. The heat of wetting of nylon 6 fibers in water decreases with rise of temperature, more steeply at lower temperature than at high. Since the heat of wetting-temperature curve would represent the transition temperature, and would certainly be a more accurate and a much quicker way for its determination, thus it's transition temperature would be about 38℃. In the mixture of water and ethanol of various ratios, the heat of wetting of nylon 6 fibers increases with rise of surface tension of the liquid. The heat of wetting of nylon 6 fibers treated with antistatic agants was slightly decreased compared with untreated fibers.

編成性 및 給絲張力에 關한 硏究

裵基瑞,宋周鎬 충남대학교 1977 工業技術開發硏究所論文集 Vol.4 No.2

This is the study of the knitting performance according to moderate yarn feeding conditions with consideration of physical property and its quality in knitting process, and the results gained from the knitting of 1×1 rib knitting fabric with 38's combed cotton yarn put in is as follows; 1) The most moderate yarn feeding speed to 38's combed cotton yarn was 56m/min. with its knitting performance tension of 50 grams. 2) The course density was indefinetly constant, regardless of any effects yarn tension increasing when yarn tension was exceeded 4 grams. 3) Formula S=Ks/l^2 could be applied to 1×1 rib knitting fabric, regardless of any conversion of yarn feeding tension. 4) Faults in knitting fabric indicated many differences according to employee's labour hours and the conditions of yarn feeding tension.