• Title/Summary/Keyword: knit

Search Result 481, Processing Time 0.087 seconds

Preparation of Carboxymethylcellulose from Cotton-Knit-Waste (폐면목으로부터 Carboxymethylcellulose의 제조)

  • 김병석;문성필
    • Textile Science and Engineering
    • /
    • v.31 no.2
    • /
    • pp.96-101
    • /
    • 1994
  • Reaction conditions for preparation of a highly substituted carboxymethylcellulose(CMC) directly from the cotton-knit-waste were determined. The cotton-knit-waste was composed of 90% of a-cellulose and less than 2% of other components, such as ash, extractives, acid soluble and insoluble part. Thus, the cotton-knit-waste was highly pure cellulose. Various grades of CMC were prepared from this cotton material under given reaction conditions. The mortar ratio of monochloroacetic acid(HCA) to cotton-knit-waste and the agitation were the most important factors determining the degree of substitution(DS) during the preparation of CMC A highly substituted CMC was obtained when the molar ratio of MCA to cotton-knit-waste was 1.9 and the agitation was 600 rpm. The viscosity in a 5% NaOH aqueous solution of the CMC prepared from cotton-knit-waste was higher than that of the commercial CMC prepared from wood pulp.

Water Absorbing Properties of Knit/Chitosan Sponge Composites (니트/키토산 스펀지 복합구조물의 흡수특성)

  • Shin, Hye-Kyoung;Chung, Yong-Sik;Park, Pyong-Ki;Lee, Hyo-Jin;Kim, Eui-Hwa
    • Textile Science and Engineering
    • /
    • v.43 no.6 s.279
    • /
    • pp.328-333
    • /
    • 2006
  • Chitosan is the second abundant natural polymer after cellulose and shows a lot of potential functional advantages such as biodegradability, biocompatibility, antimicrobial properties etc. Cotton knit/chitosan sponge composite structures were prepared by coating chitosan solutions ($CH_3COOH$, HCI) onto the cotton knit fabrics, freezing at $-80^{\circ}C$, and Iyophilizing. Chitosan in two kinds of salts solutions was crosslinked with glutaraldehyde and citric acid prior to coating. Knit/chitosan sponge structures were transformed into the hydrogel structure when they absorbed water. 2% chitosan acetate composite crosslinked with citric acid absorbed water about 23 times of its dry weight. Weak physical properties of Iyophilized chitosan sponge were improved by forming knit/chitosan composite structure.

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
    • /
    • v.33 no.4
    • /
    • pp.182-190
    • /
    • 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.

Purchase Behavior of Knit Wear Based on Lifestyle Segments (라이프스타일 세분집단에 따른 니트웨어 구매행동)

  • Choi, Soon-Ran;Hwang, Jin-Sook;Kim, Yun-Hee
    • Fashion & Textile Research Journal
    • /
    • v.11 no.1
    • /
    • pp.48-56
    • /
    • 2009
  • The purposes of this study were to segment knit wear consumers by their lifestyles and to examine knit wear purchase behavior among the lifestyle segments. The subjects of this study were female consumers who were residents in Seoul and metropolitan areas. The researchers distributed the questionnaires and the final sample of 357 was used for the data analysis. The statistical analysis methods used for the study were factor analysis, cluster analysis, ANOVA, Duncan test, and ${\chi}^2$-test. The results showed that the lifestyle factors had 6 dimensions: fashion, planned purchase, socially active, impulsive consumption, brand, and leisure/culture. These factors were categorized into four groups: brand oriented group, passive group, rational/social group, and fashion/impulsive consumption group. The results also showed that there were significant differences among the groups in regard to knit wear purchase criteria, knit wear image preferences, and other knit wear purchase behaviors. For example, brand oriented group considered design and brand name/fashion important as knit wear selection criteria, and the group preferred an elegance image and a modern image than did other groups.

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
    • /
    • v.26 no.4
    • /
    • pp.1-13
    • /
    • 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.

  • PDF