봉제속도에 따른 봉합강도에 관한 연구

김정진,장정대 한국의류학회 1999 한국의류학회지 Vol.23 No.7

This study has investigated the relation between the sewing speed and seam breaking strength applied perpendicular to the sewn direction. Breaking strength, efficiency, breaking mode of seams were examined under various sewing conditions using three kinds of sewing threads and four kinds of fabrics. The results obtained are as follows: 1. According to the increase in sewing speed, seam strength was remarkably decreased. Seam strength and its loss difference were shown variously as threads and fabrics were mixed. 2. In case of fabrics with higher strength, seam strength showed higher. And the seam strength was determined by the loop strength. 3. In case of fabrics with lower strength, seam strength and its difference for every sample showed lower. So the strength of fabrics dominated the seam strength than those of threads. 4. In the experiment using various fabrics and sewing threads, there was a type of thread appropriate to each fabric. Fabrics and threads which have similar physical properties were shown proper seam efficiency. 5. The breaking mode was different for every sample seam that was tested.

직포 지오텍스타일의 봉합선 및 봉합부 접착에 의한 봉합강도 향상에 관한 연구

연우,이형호,유남재,전한용,Yan, Yu,Lee, Hyeong Ho,Yoo, Nam Jae,Jeon, Han-Yong 한국섬유공학회 2018 한국섬유공학회지 Vol.55 No.6

In this study, a 6-line seaming method was used to connect woven geotextiles for soft ground reinforcement and select adhesives were added to the seaming part of the woven geotextile to improve the seam strength. Different reinforcement effects were observed according to the type of adhesive used. The strength retention of the seam strength was excellent when the cyanoacrylate adhesive was used in place of the epoxy adhesive. Since the reduction factor directly affects the tensile and seam strengths of the woven geotextile, it is essential to reinforce the seam using proper adhesives. The reduction factor and long-term performance of the adhesive agent are thought to contribute to the improvement of seam strength in woven geotextiles, and this was supported by the experimental results.

폴리우레탄 코팅포의 봉제성능

이정순,신혜원 한국의류학회 2001 한국의류학회지 Vol.25 No.2

In this study, seam strength, seam elongation and seam efficiency of polyurethane coated fabrics were examined under various sewing conditions using three kinds of fabrics, four kinds of sewing threads and three kinds of stitch lengths. And the sewability of polyurethane coated fabrics were evaluated by FAST system. The results were as follows: 1. Seam strength decreased with the increase of stitch length. The loop strength of sewing thread and the type of base fabric than the type of coated surface had an effect on seam strength. 2. Seam elongation also decreased with the increase of stitch length and was affected by the type of base fabric. The tensile elongation of polyurethane coated fabric had an effect on seam elongation. 3. Seam efficiency also was related to stitch length, the type of base fabric, and seam strength. The suitable seam efficiency was within 50%∼65% in which polyurethane coated fabric and sewing thread broke at the same time. Therefore PS thin and PPC thin sewing threads and anon stitch length were suitable to polyurethane coated fabrics. 4. The relaxation shrinkage(RS) of polyurethane coated fabric was smaller than the smallest value of control chart in FAST system. And the extensibility(E) and the shear rigidity(G) were larger than the largest value.

Interpretation of Seam Property by Geosynthetics Bonding Method

전한용(Han-Yong Jeon),김원춘(Yuan-Chun Jin),이용준(Yong-Joon Lee),최용석(Yong-Suk Choi),백운일(Un-il Baek) 한국지반신소재학회 2012 한국토목섬유학회 학술발표회 Vol.2012 No.11

8 Geotextiles(; 4 woven and 4 nonwoven types), 4 geogrids and 2 geocomposites of [nonwoven/fibers/nonwoven] structure were used to compare the seam properties. Tensile strength retentions of these geosynthetics were evaluated as the degree of damage by chemical degradation. Woven geotextiles showed the higher seam strength in the order (SSd-1 < SSd-2) > (SSa-1 < SSa-2) > geospacer without regard to the design strength. For nonwoven geotextiles, the order of seam strength is geospacer > (SSa-1 < SSa-2). Geogrids showed the higher seam strength in the order of band > geospacers but reduction factors were increased in the order of band > geospacer without regard to the geogrid’s compositions. Finally, geocomposites showed the higher seam strength in the order of geospacer > (SSa-1 < SSa-2).

전도성사의 심 퍼커와 봉합강도 평가

이효정 ( Hyojeong Lee ),박선희 ( Sunhee Park ),이예진 ( Yejin Lee ) 한국의류학회 2021 한국의류학회지 Vol.45 No.1

Seam puckering and the seam strength of conductive threads used to produce smart clothing were analyzed according to stitching methods and fabrics. Samples were prepared in a lock stitch and zigzag stitch on plain woven and jersey knit fabric, using one type of polyester sewing thread and three types of commercial conductive threads that consisted of two types of stainless-steel conductive threads (TST and MST) and one type of silver conductive thread (SSV). Seam pucker percentages, shapes, and seam strength were measured. On plain woven fabric as well as jersey knit fabric, three-ply TST and MST showed a higher SP percentage compared to a polyester sewing thread. Meanwhile, single-ply SSV showed the lowest SP percentage. In addition, the SP percentage of the zigzag stitch decreased along the weft and course directions of the fabric, and decreased significantly as the number of fabric layers increased. Moreover, there was a marked tendency for a higher SP percentage in jersey knit fabric compared to plain woven fabric, and the two-dimensional cross-section waveforms of stitches obtained using three-dimensional data that showed increased irregular waveforms and peaks in the zigzag stitch. There were no correlations between seam strength and tensile strength.

천연섬유의 봉합강도와 봉축률에 관한 연구

김경희,이운현,라의숙,남윤자 경희대학교 생활과학연구소 1997 생활과학논집 Vol.1 No.1

The purpose of this study is to examine the seam-strength and the sewing shrinkage ratio of natural fabrics. The results oberved in this study are as follow : 1) Among cotton, hemp and wool, hemp shows the highest seam strength by weft direction, on the other hand, cotton shows the lowest seam strength by warp direction. 2) In angular respect, cotton and hemp show high seam strength by bias and weft direction, while wool shows high seam strength by bias and warp direction. 3) The babric elongation of cotton, hemp and wool is high in bias direction. 4) Initial sewing shrinkage ratio is high in all fabrics, especially in wool.

소매산 높이에 따른 소매달림선 하부곡선상의 봉제조건에 관한 연구

이명희 한국의류산업학회 2002 한국의류산업학회지 Vol.4 No.3

An investigation was made of the angle of bias on the lower part of the armhole line of the back bodice and that on the lower part of the sleeve cap curve line by cap heights, and then it was made of the lock stitch seam strength and elongation on the matching angles, the stitch density (26 stitches/3㎝, 19 stitches/3㎝, 14 stitches/3㎝, and the samples (a cotton fabric and two kinds of cotton mixed polyester fabric). The matching angles of the machine-sewed samples are 30°/-30°,30°/-45°, 45°/-45 and 60°/-60 by the analysis of the angles of bias on the lower part of the armhole seam. In view of the results of the seam strength and elongation, the reasonable sewing condition of the lower part of the armhole seam was 19 stitches/3㎝.

Design and Evaluation of Engineering Properties for Water Permeability Development of Geotextiles

Koo-Jung(정구),Seung-Jae Ahn(안승재),Eui-Hwa Kim(김의화),Jungjo Yuu(유중조),Hong-Gwan Kim(김홍관),Han-Yong Jeon(전한용) 한국지반신소재학회 2014 한국토목섬유학회 학술발표회 Vol.2014 No.11

In this study, the main factors that affect failures of seam were discussed and basic test on the seam conditions to seam strength was conducted. And through a model for the design strength of geotextile tube, the tensile strength of geotextile that composed tube is mentioned as a basic value, unless the seam strength is the weakest part in the geotextile tube. However, long-term resistance of seam strength have not considered for determining the design strength of geotextile tube. It is seen that seam type and stitching type are more critical than strength of seam thread.

지오텍스타일 튜브의 봉합강도에 대한 고찰 : (1) 파괴거동과 요구강도

유중조(Yuu Jungjo),오영인(Oh Young-In),전한용(Jeon Han-Yong) 한국토목섬유학회 2007 한국토목섬유학회 학술발표회 Vol.2007 No.11

Recently geotextile tube was widely used in marine works and its failure phenomenon have occurred in seaming zone. Through a model for the design strength of geotextile tube, the tensile strength of geotextile that composed tube is mentioned as a basic value, unless the seam strength is the most weak part in the geotextile tube. Futhermore, long-term resistance of seam strength have not considered for determining thee design strength of geotextile tube. This paper discussed about the seam behavior in term of long-term design strength of geotextile tube.

A study of the improvement of foam material sealing technology for wetsuits

오희경,오경화,박순지 한국의류학회 2019 Fashion and Textiles Vol.6 No.1

The purpose of this study is to propose the most suitable sewing method to produce wetsuits using neoprene fabric. To construct a sewing method sample using neoprene fabric, the samples were prepared using two thicknesses (1.5 t and 3 t) of neoprene fabric. Sewing techniques comprised 10 different methods. The respective seam strengths (KSK 0530) and water resistance (KSK ISO 811) of each sample were measured. The results from the tests conducted using 10 sewing methods revealed that the seam strength of 466.7 N was the highest in the prototype constructed using zigzag and flatlock stitches on 1.5 t. The other samples had seam strengths of approximately 400 N, except for that sewn with straight stitch (113.3 N). For 3 t, the sample sewn using zigzag and flatlock stitches with seam sealing (653.3 N) had the highest strength, and the remaining samples had seam strengths of approximately 630 N, except the sample sewn with straight stitch (164.6 N). Significant factors affecting the seam strength were fabric thickness and the sewing method. Meanwhile, glue and blind stitch with seam sealing had the highest value for water resistance: 414.4 mH2O for 1.5 t and 987.6 mH2O for 3 t. The lowest values were revealed in samples sewn with zigzag and flatlock stitch 14.4 mH2O for 1.5 t and overlock stitch 13.3 mH2O for 3 t. Significant factors affecting water resistance were whether seam sealing was attached and the sewing method used. The expected result of this study, which tests the properties of two neoprene fabric thicknesses with 10 sewing methods, is the suggestion of the most appropriate sewing method for use in the production of a wet suit.