• Title, Summary, Keyword: absorbency

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The influences of coating components and structures on ink absorbency (도공층 조성 및 구조의 잉크흡수성에 대한 영향)

  • 곽상효;김진현
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • pp.7-16
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    • 1999
  • The aim of this research was to evaluate the influences of coating components and structures on ink absorbency. The ink absorbency was measured as porosity, K&N ink absorption, gloss and ink set-off. In order to obtain the relationship between the coating structure and the ink absorbency, the binder level was adjusted and two types of pigments were examined. One of the pigments was known to make the porous coating structure and the other one had strong ink affinity. The effects of coating components were studied by applying six different types of latex and various additives . In this research, CLC(cylindrical laboratory coater) and Prufbau printability tester were used. It was found that the decreasing latex dosage and introducing porous pigment were effective solutions to increase ink absorbency. However, the ink absorbency could not be improved by applying the fine pigment even though it had strong ink affinity. Among the characters of the latex, particle size and surface tension were found to have the strong effect on ink absorbency. The ink absorbency increased with large particle size and low surface tension latex. The additives were varied and it was found that applying to the top coating was effective.

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Effect of Fabric Softner on the Absorbency, Stiffness and Antistatic Properties of Fabrics. (유연제 사용에 따른 직물의 흡수성.유연성.대전성 변화에 관한 연구)

  • 김언아
    • Journal of the Korean Home Economics Association
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    • v.31 no.2
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    • pp.189-203
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    • 1993
  • The objective of this study was to investigate the changes of the fabric absorbency, stiffness and antistatic property by using a fabric softner at laundering. The samples selected in this study were cotton and polyester fabrics. The cotton fabric was treated with 1/2 times(0.035%), 1 time(0.07%), 3 times(0.21%) and 10 times(0.7%) of the commercially suggested concentration (0.07%) of the fabric softner. And polyester fabric was done at 1 time(0.07%) of that. In order to examine the effect of the fabric by using a fabric softner, the abstraction of a surface active agent and quantitative analysis was performed by using a UV/VIS Spectroscopy and the correlations among the absorbency, stiffness and antistatic property was analyzed. The results obtained from this study were as follows; 1. In the cotton fabric, fabric softner gave the degradation of absorbency, and stiffness improvement was not shown by repeated fabric softner on the cotton fabric. 2. In the polyester fabric, the absorbency increased and the stiffness in creased very slightly. Specially, it is desirable to use fabric softner on the polyester due to improvement of antistatic property.

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Effect of Manufacturing Conditions on the Properties of Oil-absorbable Melt Blown Nonwoven (멜트블로운 부직포 제조공정이 유흡착포의 특성에 미치는 영향)

  • Shin, Hyun-Sae;Jin, Lu;Yoo, Joo-Hwan
    • Textile Coloration and Finishing
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    • v.21 no.6
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    • pp.22-28
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    • 2009
  • Oil-absorbable nonwovens were produced by melt-blown processing of polypropylene chips. The melt-blown processing conditions, such as air pressure, and gear pump speed, DCD. In this study, these three factors were chosen to produce samples. Experimental array and variance analysis of the design of experiment were used to increase the field repeatability and universality. The effect of the factors on oil absorption properties of melt-blown nonwoven fabric such as oil absorbency were evaluated. As a result, the fiber diameter decreased as gearpump speed decreased or air pressure increased. The oil absorbency increased as air pressure increased or gearpump speed decreased and with the DCD increasing the oil absorbency significantly increased.

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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A Study on Oil Absorption Rate and Oil Absorbency of Melt-blown Nonwoven (멜트블로운 부직포의 흡유도와 흡유거동에 관한 연구)

  • Shin, Hyun-Sae;Yoo, Joo-Hwan;Jin, Lu
    • Textile Coloration and Finishing
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    • v.22 no.3
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    • pp.257-263
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    • 2010
  • Oil-absorbable nonwovens were produced by meltblown processing of polypropylene chips. In this study, experimental array and variance analysis of the design of experiment were used to increase the field repeatability and universality. Oil absorbency was decreased, as oil absorbable nonwovens of packing density and gearpump speed were increased. Oil absorption rate was increased, as packing density was increased. Also the oil absorption rate increased with increasing gear-pump speed.

PRELIMINARY STUDIES ON NATURAL PLANT EXTRACTS AS SUNSCREEN AGENTS

  • Lee, K.T.;Kim, J.H.
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.24 no.3
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    • pp.81-88
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    • 1998
  • The aim of this study is to evaluate several plant extracts with a view to developing UV sunscreen agents. In this study, 150 plant extracts were screened to elucidate their UV spectra using spectrophotometric method. Several plant extracts such as Phellodendron amurense, Morus alba, Rhododendron mucronulatum, Brassica alba have strong absorbency at UVA region (350nm), the suntanning wavelength. And Sophora flavescens, Caesalpinia sapper, Morus alba, Phellodendron amurense, showed absorption plateau value at UVB region (308nm), the erythema action wavelength. These extracts have a good absorbency property as synthetic filter and could be served as substitutes for synthetic UV sunscreen agents.

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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.

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.

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.

Properties of Black Walnut hull Extracts with Extractive Conditions (추출조건에 따른 호두외피추출물의 특성)

  • Kim, Ho-Jung
    • Fashion & Textile Research Journal
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    • v.8 no.4
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    • pp.465-470
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    • 2006
  • Walnut hull is a by-product from the Walnut tree, used as natural dyestuff from ancient times. This study was done to examine the effects of extractive conditions on the properties of walnut hull extracts for making efficient use of the walnut hull as a natural colorant. Aqueous extracts of walnut hull were prepared at various extractive concentration, temperature and time. Then they were characterized using UV-Vis. Spectrophotometer, FT-IR Spectrometer, Prep Liquid Chromatography, and Energy dispersive X-ray spectrometer. The aqueous extracts have two absorbency peaks of UV-Vis. Spectrum, shoulder type peak in the range of 270-280 nm and broad type band around 420 nm. Intensity of absorbency is increased with increase of extraction concentration and time. However, Boiling temperature extraction method showed the most efficiency of all. Intensity of absorbency is also affected by extraction pH. The Prep LC examined two kinds of isolated colorant with different molecular weight. FT-IR spectra of hull extracts showed an absorption band around $3400cm^{-1}$, the peaks at $1700-1600cm^{-1}$, which are characteristic of aromatic compounds with unsaturated ketone and benzene ring. It showed that the extraction contained some mineral ions, such as K, Ca, Si, Mg.