• Title/Summary/Keyword: Knit fabric

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Anti-crease Finish of Cotton/Spandex Knit Fabric(II)-Setting Behaviors of Knit Fabric with Heat Treatment- (면/스판덱스 편성물의 구김방지가공(II)-열처리에 따른 편성물의 세팅 거동-)

  • 박흥수;이명학;김영호
    • Textile Science and Engineering
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    • v.37 no.12
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    • pp.744-750
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    • 2000
  • The methods to decrease crease of cotton/spandex knit fabric using heat treatment were investigated. Dry heat treatment, hot water treatment, and steam treatment were used to set spandex yarn in knit fabric. Length changes of spandex yarn in knit fabric. Length changes of spandex yarn in knit fabric treated or stored under various conditions were investigated. Wrinkle recovery rates, elongation, and tensile strength changes of the fabric were also measured. The length change of the spandex yarn in knit fabric treated with steam was larger than those treated with dry heat and hot water. It increased with increasing extension of spandex yarn in knit fabric. A long loop length of cotton yarn in knit fabric resulted in a smaller length change of the spandex yarn subjected to the same heat treatment due to the low extension of spandex yarn in fabric. The length of spandex yarn in knit fabric increased during storage even at room temperature. The crease of cotton/spandex knit fabric could be removed by setting spandex yarn in the fabric. Considering the strength retention and elongation, steam treatment was found to be the most effective to remove the crease of the knit fabric.

Effect of Knit Fabric Constituent Characteristics on Preference (니트 소재 구성특성이 선호도에 미치는 영향)

  • Roh, Eui-Kyung;Kim, Seong-Hun
    • Journal of the Korean Society of Clothing and Textiles
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    • v.32 no.4
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    • pp.651-658
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    • 2008
  • Conjoint analysis estimates how much each of the attributes is valued on the basis of the choices consumers make among product concepts that are varied in systematic ways. The purposes of this research were to evaluate the relative importance of each fabric constituent characteristic for the consumer's utility or preference, to compare with the relative importance between the trained and the untrained panelists, and to identify the combinations of the constituent characteristic of knit fabric which offer consumers greater utility. Conjoint analysis was conducted using data taken from 54 trained and 54 untrained panelists, who rated preference for 12 different knit fabrics. The stitch length had a greater effect on knit fabric preference than the mixture ratio of fiber. There was no difference on effect of knit constituent characteristics for preference between the trained and the untrained panelists. Total, trained and untrained group preferred a knit fabric that had a higher acrylic mixture ratio and a short stitch length.

Changes in Absorbency and Drying Speed of a Quick-drying Knit Fabric by Repeated Laundering

  • Roh, Eui-Kyung;Kim, Eun-Ae
    • Journal of the Korean Society of Clothing and Textiles
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    • v.34 no.12
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    • pp.2062-2072
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    • 2010
  • This research evaluates the change of the water absorbency and drying speed of a quick-drying knit fabric by repeated laundering and laundering conditions and investigates the influence of laundering conditions on the functional properties of the knit fabric. Four factors of laundering conditions were studied: detergent, water hardness, water temperature, and frequency of rotation. Knit fabrics were washed for 25 laundering cycles in a drum-type washing machine with nine different laundering conditions derived from an orthogonal array. The properties of knit fabrics were measured with a drop absorption test, a strip test, and a drying time test. Relaxation shrinkage pointed to a change in the structural characteristics of the knit fabric. Wetting time was faster and wickability was greater in the knit fabrics that underwent 5 laundering cycles; in addition, there were no obvious changes in wetting time and wickability. The detergent was the most important factor in wetting time (40.4%) and wickability (60% or above). Water hardness, water temperature and RPM had less of an effect on wetting time and wickability. There were no significant differences between the levels of laundering conditions (except for detergent) on wetting time and wickability. Drying times with neutral and alkali were slower by repeated laundering; however, there was no obvious change in drying time. Hardness, water temperature and RPM had less of an impact on drying time.

Analysis of Knit Fabric Structure with its Voxel Data

  • Shinohara, T.;Takayama, J.;Ohyama, S.;Kobayashi, A.
    • 제어로봇시스템학회:학술대회논문집
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    • 2003.10a
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    • pp.53-56
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    • 2003
  • For identifying how a sample knit fabric is woven a method to obtain positional information of each yarn of the sample from voxel data made out of its x-ray CT images is newly proposed in this paper. The positional information is obtained by tracing the each yarn. The each yarn is traced by estimating a direction of the yarn in a certain small region in which the yarn can be regarded as straight and moving the region slightly along the estimated direction alternately. The yarn direction is estimated by correlating the voxel data in the region with a three-dimensional yarn model. The effectiveness of this method is confirmed by applying the method to voxel data made out of CT images of a knit fabric experimentally.

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A Study on the Dyeing and Physical Properties of Napping Knit Fabric using Latent Crimped Yarn (잠재권축사를 적용한 기모편성물의 염색 및 물성변화에 대한 연구)

  • Lee, Bum Hoon
    • Textile Coloration and Finishing
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    • v.33 no.4
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    • pp.182-190
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    • 2021
  • The purpose of this study is to provide the dyeing and physical characteristics of napped knit fabrics composed of latent crimped yarn. The K/S values, dyeing fastness, thickness, bulkiness, and shrinkage characteristics of three knit fabrics were investigated. The original knit fabric (SK) was composed of 1ply latent crimped yarn (75/36) in the ground and PET DTY (70/100) in the pile loop, in order of napped process the napped knit fabric (SN) was napped SK fabric. In order to compare of latent crimped yarn content, the last knit fabric (DN) was napped 2ply latent crimped yarn were included in the same structure of SK. Dyeability of three knit fabrics was similar but the shrinkage properties of DN fabric were significant different. The bulkiness shows a tendency to increase the bulkiness as increasing the dyeing temperature, and the bulkiness of the SN was higher because of the napping process and optimal content of latent crimped yarn.

A Study on Moisture Related Properties and Human Sensations of Underwear (1) -A Study on Water and Water Vapor Transport characteristics of Underwear Fabrics- (시판 내의류소재의 수분특성 및 착용감에 관한 연구 (I) -시판 내의류 소재의 수분특성-)

  • 이순원
    • Journal of the Korean Home Economics Association
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    • v.26 no.4
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    • pp.1-13
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    • 1988
  • The purpose of this study is to investigate water and after vapor transport characteristics of underwear fabrics. Experimental materials were cotton woven fabric and cotton knitted fabric, nylon tricot (untreated and hydrophilic finished) and cotton/polyester/cotton triple layer. Cotton knitted fabric have three types of knit structure (interlock, rib, plain stitch) and knit with either 38's or 60's combed yarn. And cotton woven fabric have plain weave with 60's combed yarn. As experimental methods, vapor cup test, dynamic method, vertical wicking test and transplanar uptake test were used. The results are as follows. 1) In cotton specimens, the order of water vapor transpiration (wvt) was plain > rib > interlock in the same yarn diameter. The knit fabric of thinner yarn showed the better wvt among the same knit structure. 2) In cotton specimens, the order of water absorbency was interlock > rib > plain in the same yarn diameter. the knit fabric of thicker yarn showed the better absorbency among the same knit structure. 3) When knit fabric (60's plain) is compared with woven fabric 960's plain), knit fabric showed faster rate of wvt, more amount of uptake and slower rate of water uptake than woven fabric did. 4) When compared untreated nylon with hydrophilic finished nylon, hydrophilic finished nylon showed much more water absorbency than untreated nylon did, but showed same rate of wvt. 5) The water transport characteristics of triple layer underwear fabric showed that the thinner and the lighter one, the better wvt and absorbency did.

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Physical Properties and Objective Hand Values of Recycled Polyester Knit Fabrics (리싸이클 폴리에스터 니트 소재의 물리적 성질 및 태 평가)

  • Choi, Yeon-Joo;Kim, Seong-Hun;Lim, Ki-Sub
    • Textile Science and Engineering
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    • v.49 no.2
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    • pp.98-105
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    • 2012
  • With regards to environmental conservation, it is necessary to promote an eco-friendly industry and to recycle wastes. In this study, the physical properties and hand values of material recycled PET knit fabrics prepared with various recycled PET yarns were investigated. Bursting strengths of 3 recycled PET knit fabrics were higher than that of regular PET knit fabric. 3 Recycled PET knit fabrics were more flexible than those of the regular PET knit fabric. Lightness of regular PET knit fabric was the highest among the 5 samples. Fabric knitted with recycled non-circular PET yarns had a more yellowish tinge. Mechanical properties were measured using the KES-FB system. Bending properties, shear properties, weight, and thickness were increased in recycled PET knit fabrics. The compressional linearity and energy of 3 recycled PET knit fabrics increased. However, their compressional resilience was reduced. In addition, coefficients of friction were similar. Regular PET knit fabric demonstrated a smooth appearance. Numeri was the highest in the hand values.

Effect of Washing Conditions on Dimensional Change and Mechanical Properties in Polyester/Spandex Knit Fabric (세탁조건에 따른 폴리에스터/스판덱스 편성물의 형태안정성과 역학적 특성 변화)

  • Roh, Eui Kyung;Kim, Eunae
    • Fashion & Textile Research Journal
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    • v.20 no.1
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    • pp.93-100
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    • 2018
  • This study comparatively analyzed the changes in the dimensional stability and the mechanical properties of stretch knit fabrics associated with washings conditions in order to determine the most appropriate washing method. Polyester and spandex knit fabrics were washed 25 cycles with nine washing condition profiles that controled detergent, hardness. temperature and RPM. The knit fabrics with repeated washings were evaluated by dimensional stability and measured by the KES-FB system. Polyester and spandex fibers have good chemical resistance. However, the changes in the dimensional stability and the mechanical properties were observed in washed knit fabrics. After repeated washings, the knit fabrics washed in an alkali or neutral detergent had good dimensional stability compared with the knit fabric washed in functional detergent. The washed knit fabrics were extended, stiff, rough, and had a smaller volume. The changes were the result of the rearrange of polyester fibers which twisted around spandex core and chemical interactions involving the detergent and the physical and mechanical forces of washing. Especially, using an alkali detergent resulted in increased stiffness and roughness of the knit fabric. In conclusion, the washing in water with low hardness and a neutral detergent can minimize the changes in dimensional stability and mechanical properties of polyester and spandex knit fabric.

Dyeing Properties of PET/Dyeable PP Double Knit Fabric (PET/가염PP 이종 편성물의 염색 특성)

  • Chang, Young-Min;Lee, Jin-Ah;Park, Jong-Ho;Koh, Joon-Seok;Jung, Young-Jin;Kim, Sung-Dong
    • Textile Coloration and Finishing
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    • v.20 no.2
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    • pp.53-58
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    • 2008
  • New dyeable PP fiber and several products from it has been developed through dispersing polyester copolymer into PP resin by a Korean synthetic fiber manufacturer and its colleagues. The dyeing properties of PET/dyeable PP double knit fabric were examined with three different types of disperse dye in this study. It was found that the disperse dye, exhausted on dyeable PP at early stage of dyeing, migrated to PET at elevated dyeing temperature when two fibers were dyed in the same dye bath. The ratios of dye distribution between two substrates dyed at $120^{\circ}C$ and $130^{\circ}C$ showed no difference. S type disperse dyes showed good build-up properties and acceptable color fastness while high light fastness type exhibited the lowest amounts of exhaustion but excellent color fastness. It might be concluded that the most appropriate dye for PET/dyeable PP double knit fabric was S type, and that some color difference between PET side and dyeable PP side was unvoidable.

Evaluation of Seam Puckering and Seam Strength for Conductive Threads (전도성사의 심 퍼커와 봉합강도 평가)

  • Lee, Hyojeong;Park, Sunhee;Lee, Yejin
    • Journal of the Korean Society of Clothing and Textiles
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    • v.45 no.1
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    • pp.46-55
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    • 2021
  • 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.