• 패션비즈니스
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• 제2권4호
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• pp.93-101
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• 1998

Knit products which had been limited only to underwear, recently became popularized, fashionized and highly classified covering even outer garments such as sportswear like golfwear, woman's dress, and man' s suit. As fashion cycle is getting shorter and the more a nation advanced prefers knit to woven fabrics knit industry has a very bright prospect, particularly woman's knit which is sensitive to fashion can be said as a fashion product with high value added. This study is to grasp the physical properties of stitch which are fundamental to the development of knit products. For this purpose, 2/20s of 100% wool were woven by the author of this study to basic plain stitch, rib stitch, varied transfer stitch, and float stitch on a SEMASEIKI cross knitter 7G to test the physical properties, and the result was as follows; 1. As for the relation between knit stitch and rate of extension recovery, rate of extension recovery was higher in the course direction than in the wale direction of three stitches except transfer stitch; rib stitch showed the highest rate of extension recovery in the course direction while float stitch showed the highest rate of extension recovery in the wale direction. 2. As for the relation between knit stitch and bursting strength elastic rib stitch showed higher bursting strength to indicate elasticity is an important factor of bursting strength and float stitch showed higher bursting strength too to indicate that the floating yarn on the surface plays a role of support. 3. As for the relation between knit stitch and air permeability perforated transfer stitch showed the lowest air permeability to prove that the size of perforation affects on the air permeability a great deal. 4. As for the relation between knit stitch and warmth retaining rib stitch through two lined needle bar showed the highest degree. The reason the warmth of perforated transfer stitch didn't decrease much was because the perforation wasn't big enough and content of air increased from the unevenness of the perforated parts through stitch variation. Based upon this result, each stitch can be characteristically summarized as follows; plain stitch showed a stable condition of knit cloth in four kinds of physical property test. And rib stitch is proper to tighten the edge of sleeve or clothe making use of its excellent extension recovery and to make socks for the highest bursting strength and warmth retaining. In the case of transfer stitch, seasonable designs can be taken by controlling the size of loop. Considering the pleasantness, underwear should be made of stitches with good air permeability float stitch was revealed to have color and pattern effects and a great bursting strength. This study has limitations in the aspect that it dealed with a small part of various knit stitches and the items of physical property test were not enough. The author of this study hopes that further studies would make deeper understandings about knit stitch based on more varied stitches and physical property tests ultimately to contribute to the development of fashionable designs proper to maximize the usage, function and originality.

• 한국의류산업학회지
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• 제8권5호
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• pp.562-570
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• 2006

Knit industry requires versatile knit designers who have to control whole process such as material select, color, type of machine, technique, structure and shape. In other words, knit designers urgently need to interplay between technology and design aesthetics. It becomes essential to learn and master basic principles of knitting in order to design and develop effectively for innovative knitwear design. The main purpose of this study is to show fresh methodology through examining the various applications of 'Stitch transfer knitting structure' used in women's knitwear design development. Stitch transfer knitting structure is one of the most popular techniques among various basic knitting methods. Eight knitwears were designed and produced with various types of formative applications which differ from existent stitch transfer knitwears of flat and simple style in the market. These are produced by computer knitting machine 'Shima Seiki 122S' and programmed by 'Knit CAD' software. Among various basic stitch transfer pattern, 'Leaf' pattern is selected as a most effective example for this study. This fabric applied to collar, sleeves, body pattern and accessories as formative decoration. It is expected that this study of methodology helps to get open mind and to indicate possibility to develop and show creative and innovative knitwear and knitted textile design.

• 감성과학
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• 제25권4호
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• pp.119-128
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• 2022

본 연구의 목적은 웨어러블 에너지 하베스팅의 전도사를 통한 효율적인 전력 전달을 위해 전도사 자수 스트치 회로에서 각도와 굽힘의 개수가 저항에 미치는 영향을 분석하고 실제 태양광 패널과의 연결을 통해 손실 전력의 변화를 연구하는 것이다. 본 연구에서는 전도사 스티치 회로의 각도를 30˚부터 180˚까지 30˚단위로 설계하였으며 저항의 측정은 analog discovery2 장비를 활용하여 측정한다. 측정한 저항값을 분석하여 저항값이 급격히 변화하는 각도의 구간에서는 5˚단위로 다시 측정하여 분석한다. 이후 분석 결과를 토대로 전도사에 가해지는 장력이 수렴하는 각도를 분석하고 해당 각도에서 스티치의 굽힘 개수를 달리하여 다시 저항을 측정한다. 스티치의 각도가 줄어들수록, 굽힘의 개수가 늘어날수록 저항은 줄어듦을 확인하고 연구결과를 토대로 스티치로 인한 손실 전력을 계산한 결과 전도사 자수 스티치가 일반적인 자수에 비해 1.61배의 손실 전력을 줄일 수 있음을 고찰한다. 이러한 결과는 웨어러블 에너지 하베스팅의 전도사를 통한 전달에서 자수의 스티치가 전력 전달에 중요한 영향을 미치는 것을 시사한다. 본 연구결과를 기반으로 후속 연구에서는 곡선 형태의 스티치, 전도사의 개수 등 다양한 형태의 스티치를 비교 분석하여 웨어러블 에너지 하베스팅이 보다 효율적으로 생산 후 저장될 수 있도록 하는 전도사 회로 설계 기술을 개발하고자 한다.

• 한국정밀공학회지
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• 제14권10호
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• pp.35-43
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• 1997

In this paper, we perform a mechanism analysis and optimal design of the feeding system in a industrial sewing machine. Sewing machines are classified by the transfer mechanism as (1) transferred by feeddog only (2) transferred by feeddog and needle (3) transferred by feeddog, needle and pressure bar. The sewing machine classified as (2) is studied which is more efficient in transferring fabrics than the machine classified as (1). In analyzing the mechanism, we divide the feeding mechanism as feeddog mechanism and needle bar mechanism. The two mechanisms are conneted with each other kinematically because fabrics are transferred by two needles and a feeddog simultaneously and stitched by two needles which pass through the feeddog in every stitch cycle. We define good stitch as coincidence of stitch between the forward and reverse motion of feeding. We optimize the feeding mechanism for that purpose. It is illustrated that stitching performance of the optimized mechanism is compared to original feeding mechanism.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1996년도 춘계학술대회 논문집
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• pp.803-807
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• 1996

In this paper, we perform a mechanism anlysis and optyimal designof the feeding system in a industrial sewing machine. Sewing machines are classified by the transfer mechanism as (1) transferred by feed dog only (2) transferred by feed dog and needle (3) transferred by feed dog, needle and pressure bar. We took the dewing machine classified as (2) which is more efficient in transferring the clothes than the machine classified as (1). In analyzing the mechanism, we divide the feeding mechanism as feed dog mechanism and needle bar mechanism. The two mechanisms are connected with each other kinematically because the clothes are transferred by needle and feed dog simultaneously and stitched by needle which pass through the feed dog in every stitchcycle. We define good stitch as coincidence of stitch between the forward and reverse motion of feeding. And we optimize feeding mechanism for that purpose. It is illustrated that stitching performance of the optimized mechanism is compared to original feeding mechanism.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2002년도 추계학술발표대회 논문집
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• pp.280-283
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• 2002

In the manufacturing of large scale composite structures, the cost-effective processing and the enhancement of structural performance are critical. One of the most effective ways for this purpose is to use stitched multiaxial warp knitted (MWK) perform in the resin transfer molding process. This study reports the effect of stitching on the mechanical properties of MWK composites, and the feasibility processing of the thick U-beam structure utilizing the stitched preforms. Permeability of the preform, viscosity and cure property of the epoxy resin have been measured. The results of resin flow analysis has been used in determining the gate/vent locations of the RTM mold. Cross-sectional observation of the channel beam prototype demonstrated that the resin impregnation was almost complete, except for some surrounding area of stitched yarns.

• Archives of Reconstructive Microsurgery
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• 제8권1호
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• pp.22-27
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• 1999

While the conventional end-to-end anastomotic technique is accepted as 'the golden standard' for microvascular anastomosis, it is time-consuming and tedious. In an effort to offer faster and safer ways of performing microvascular anastomoses, numerous anastomotic techniques have been proposed, but further refinements in microvascular techniques are still necessary. A 'continuous suture with interrupted knot' technique was devised for faster and safer anastomosis. It has been successfully used in microanastomoses of both artery and vein for free tissue transfer. It is a combination of the interrupted suturing technique and the continuous suturing technique. First, a continuous suture is made with the size of loop decreasing in order, and then the sutures are tied individually from the first loop to the last one as in the conventional interrupted suturing technique. It was applied clinically to fourteen patients over the past ten months and found to be a highly efficient technique that satisfied our needs. This 'continuous suture with interrupted knot' technique has several advantages over other techniques : The operative time is reduced comparing conventional interrupted suture technique. By delaying the tie and with the vessel walls kept separated, the risk of through-stitch can be reduced. Tying all the sutures at one time not only speed up the procedures, but also reduced the surgeon's fatigue. In addition, it has no problem of anastomotic stenosis which is a disadvantage of continuous suture technique. This technique proved to be faster and safer, and has patency equal to that of the conventional end-to-end anastomosis. It is of great help to the surgeon in reducing operative time, especially in clinical situations when many anastomoses are required, or lengthy grafting procedures are undertaken.