• Title/Summary/Keyword: Water absorbency

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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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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.

Effects of Surfactants on Pectinase Treatment of Cotton/Chitosan Blends (면/키토산 혼방섬유의 펙티나제 처리시 계면활성제의 영향)

  • Song, Yu-Sun;Kim, Hye-Rim;Song, Wha-Soon
    • Journal of the Korean Society of Clothing and Textiles
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    • v.33 no.12
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    • pp.1965-1970
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    • 2009
  • This study examined the effect of surfactant pretreatment on the pectinase-treated cotton/chitosan blends by weight loss and properties such as water absorbency, dyeability, tensile strength, pilling property, and surface morphology. The weight loss of cotton/chitosan blends was 1.5% by the surfactant pretreatment/pectinase treatment. The water absorbency and dyeability of samples showed a significant improvement by the surfactant pretreatment/pectinase treatment. The tensile strength and pilling property of treated fabrics showed no change. The water absorbency and dyeability of pectinase treated samples improved with the pretreatment of the surfactant without damaging the fibers.

The Effect of Steam Treatment on Dyeing Properties of Wool Fibers (증기처리가 양모섬유의 염색성에 미치는 영향)

  • Lee, Mun Cheul;Bae, So Yeung;Wang, In Sook
    • Textile Coloration and Finishing
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    • v.9 no.2
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    • pp.10-16
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    • 1997
  • Merino wool top and fabric have been treated with steams such as superheated steam or high pressure steam. Moisture regain, water absorbency, water penetration, zeta potential, ESCA, SEM, and dyeing behavior were studied. Negative electric potential on the surface of wool fibers by steam treatment became higher than untreated. From the results of ESCA measurement, intensity of $O_{1s}$ was increased by steam treatment. Rate of dyeing and saturation dye exhaustion of wools increased by steam treatment, especially high pressure steam treatment. Moisture regain, water absorbency, water penetration, and surface appearances by SEM photographs of the steam-treated wools didn't change. There is no relationship between dyeing of the steam-treated wool and wettability to water. Therefore It seems likely that relaxation of adhesive filler in interscale of wool by steam treatment accelerate dye penetration into the fiber.

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A Study on Recycling NaOH from Pre-treatment Process with Concentration Control System - Scouring Ability of Cotton Fabric Treated with Recycled NaOH - (농도제어장치를 이용하여 면직물 전처리 공정에서 발생하는 가성소다 폐액의 재활용에 관한 연구 - 재활용 가성소다에 의한 면직물의 정련성 -)

  • Lee, Un-Pill
    • Fashion & Textile Research Journal
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    • v.6 no.3
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    • pp.393-398
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    • 2004
  • This research offers recycling method of NaOH from mercerizing process of cotton fabric. The measuring system of NaOH concentration was designed for the mercerizing process and tested for various conditions which can be occurred in factory. The accuracy of the system was varied as the testing condition was changed. As the concentration of sulfuric acid used for titrating NaOH decreased, the accuracy of measuring system increased. The concentration of NaOH for waste water collected from mercerizing process was measured by 5.2%. As the ratio of newly mixed NaOH increased, moisture regain. water absorbency and whiteness of the specimen increased. The bending rigidity(B) and shear rigidity(G) decreased, as the ratio of newly mixed NaOH increased.

Optimization of the Water Absorption by Crosslinked Agar-g-Poly(acrylic acid) (Agar 그래프트 폴리아크릴산 겔의 흡수능 최적화)

  • Wuttisela, Karntarat;Panijpan, Bhinyo;Triampo, Wannapong;Triampo, Darapond
    • Polymer(Korea)
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    • v.32 no.6
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    • pp.537-543
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    • 2008
  • Crosslinked agar-g-poly(acrylic acid) (x-agar-g-PAA) super absorbent with a water absorbency ($Q_{H2O}$) of approximately 660 g/g was synthesized by the copolymerization of agar with an acrylic acid monomer. KPS and MBA were used as the initiator and crosslinker, respectively. Grafting was performed in air. Infrared spectroscopy was used to identify the product of copolymerization. The optimum conditions to synthesize the x-agar-g-PAA superabsorbent were 0.1 g of agar, 0.1 g of the KPS initiator, for 15 min; 50% AA monomer, 0.005 g of the MBA crosslinker, for a propagation time of 5 min; and 1 M NaOH for 15 min to allow for saponification. The reaction temperature was $80{^\circ}C$.

Study on the Characteristics of the Absorbency Silicone by Super Absorbent Polymers (고흡수성 수지를 이용한 흡수성 실리콘의 특성 연구)

  • Cha, Gook-Chan;Song, Jeom-Sik;Lee, Suk-Min
    • Elastomers and Composites
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    • v.47 no.2
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    • pp.141-147
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    • 2012
  • Silicone resin has no water-absorbing function because it is a strong hydrophobic polymer. However, addition of super absorbent polymer gives much better absorbency than that of conventional silicone resin. In this study, we developed novel silicone materials with water-absorbing function by choosing three types of amorphous acrylic super absorbent polymers with different particle sizes, determining the mixing ratio of the three polymers and applying the mixtures into two-component type silicone material for medical purpose. The change in the mechanical properties such as tensile strength, tear strength, compressive strength and hardness was investigated by varying the particle size and content ratio of the added super absorbent polymers while preparing the silicone resins. The absorbency of the silicone resins was measured over time. Additionally, the particle shape of the super absorbent polymers as well as the distribution within the silicone resin was observed using an optical microscope.

Radiation-Induced Grafting of Acrylic Acid onto Cellulose: III. The Water Absorption Characteristics (셀룰로오스에 아크릴산의 방사선 그라프트 반응: III. 셀룰로오스의 흡수특성)

  • Kwon, Oh Hyun;Nho, Young Chang
    • Applied Chemistry for Engineering
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    • v.9 no.4
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    • pp.516-522
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    • 1998
  • In this study, a water adsorbent was synthesized by radiation grafting of acrylic acid and multifunctional monomers such as 1,2-propanediol dimethacrylate (PDMA) and 1,1,1-trimethylolethane triacrylate (TMETA) onto cellulose and its subsequent treatment with 5% NaOH. Its absorbency on $H_2O$ and 0.9 % NaCl aqueous solution was examined. The highest absorbency on water and on 0.9% NaCl aqueous solution was obtained from the addition of 0.75 vol % PDDMA and of 1.0 vol % TMETA onto acrylic acid solution, respectively. The absorbency of commercial hygienic band on water and NaCl aqueous solution was 21 g/g and 22 g/g, respectively. However, that for acrylic acid-grafted cellulose including TMETA was 298 g/g and 54 g/g, respectively.

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Photocrosslinking of PEO Films Using UV Irradiation (자외선 조사를 이용한 PEO 필름의 광가교)

  • Gu, Gwang-Hoe;Jang, Jin-Ho
    • Proceedings of the Korean Society of Dyers and Finishers Conference
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    • 2008.04a
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    • pp.28-30
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    • 2008
  • Poly(ethylene oxide)(PEO) of molecular weight of 300,000 was crosslinked by exposure to UV irradiation. Photochemical crosslinking of PEO occurred by UV irradiation and the presence of benzophenone in the film which acts as a hydrogen-abstracting agent. Percent conversion of the polymer into gel as well as water absorbency were investigated gravimetrically. Gel fraction and water absorbency of PEO films increased with increasing UV energy. In case of photocrosslinked PEO films with benzophenone, gel fraction increased up to about 90%. The thermal behavior of crosslinked PEO films was studied by thermogravimetric analysis. The maximum decomposition temperature increased with increasing UV energy and benzophenone concentration.

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Bioscouring of 100% Cotton Fabric with Alkaline Pectinase (알칼리 펙티나제를 이용한 면직물의 효소정련)

  • Choe Eon Kyung;Park Jong Ho;Kim Sung Dong
    • Textile Coloration and Finishing
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    • v.17 no.1
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    • pp.14-19
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    • 2005
  • Study on the use of enzymes for textile wet processing has been very active. The exploratory research conducted herein is related to the bioscouring process for cotton fabric. The optimum concentration of alkaline pectinase(BioPrep) was in the range of 0.05~0.2 g/l, the proper treatment time was 30~60 minutes, the appropriate treatment temperature was $60^{\circ}C$ for both the batch method and the padding method. The simultaneous desizing/bioscouring by padding method did not give water absorbency as good as the bioscouring after desizing. Color of fabrics which were bioscoured and dyed with direct dyes and a reactive dye was just a little darker than that of NaOH scoured one. K/S and Lab values of the bioscoured fabrics, regardless of the degree of water absorbency, were quite similar to each other.