• Title/Summary/Keyword: Moisture Resistant

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Improvement of Moisture Resistance of Aqueous Slip-Resistant Adhesive on the Polyethylene Film (폴리에틸렌 필름에서의 수용성 미끄럼 방지 접착제의 내습 특성 개선)

  • Yoon, Young Ki;Cho, Kuk Young;Seol, Wan Ho
    • Korean Chemical Engineering Research
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    • v.48 no.2
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    • pp.193-197
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    • 2010
  • Stretch wrapping processes that are used to the packaging process had a serious problem of high price and treatment of used wraps. On the other hand, slip-resistant adhesive provides the advantage of simple process, low cost, and free from after-use treatment. In this research, adhesion deterioration of aqueous slip-resistant adhesive adhered to polyethylene film under the moisture condition using aqueous slip-resistant adhesive was observed by the Peel Test. Improvement of adhesive property under the moisturizing condition could be obtained by the selection of appropriate additives. As a result, introduction of maltodextrin reduced the deterioration of slip-resistant adhesion owing to the improved moisture resistance and introduction amount of 10 wt% of maltodextrin showed optimal performance.

Moisture Vapor Management Properties of Fabrics Determining Human Sensorial Comfort in Transient Conditions (동적 상태에서 주관적 착용감에 영향을 미치는 직물의 수증기상태의 수분전달 특성)

  • ;Roger L. Barker
    • Journal of the Korean Society of Clothing and Textiles
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    • v.24 no.7
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    • pp.1073-1080
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    • 2000
  • Moisture transfer property of fabrics has known as one of the most important factors deciding wearer's subjective comfort not only thermally but also of sensorial. As a decisive property of fabric materials in determining human sensorial comfort, moisture vapor management property of heat resistant workwear material was examined in terms of increasing and decreasing rate and maximum value of relative humidity in the microclimate under the sweat pulse situation. An unique moisture regulation index, B$_{d}$, was calculated from the measurements using a novel dynamic sweating hot plate apparatus and was used to assess the buffering capacity of fabrics against a moisture vapor sweat pulse.e.

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Manufacture of Water-Resistant Corrugated Board Boxes for Agricultural Products in the Cold Chain System(III) - Effects of types of base paper and surface treatments on physical properties of the base paper for water resistant corrugated board - (농산물 저온유통용 내수 골판지 상자의 제조(제3보) -원지의 종류와 표면처리 방법에 따른 내수 골판지 원지의 물성-)

  • Jo Jung-Yeon;Min Choon-Ki;Shin Jun-Seop
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.37 no.2 s.110
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    • pp.70-77
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    • 2005
  • For the purpose of developing liner board for water resistant corrugated board in the cold chain system, several types of base paper for corrugated board were purchased from the market and 6 different boards were produced in the mill by applying the chemicals, chosen in the previous studies, on the base paper. Then water-moisture resistance and physical properties of the boards were compared each other. The liner board which is dried at high temperature with pressure by Condebelt (CK paper) showed a superior performance in strength over common liner boards. Strength of the board increased by surface chemical treatment up to $60\%$ of compressive strength and $30\%$ of burst strength. Starch insolubilization with Ammonium Zirconium Carbonate and surface coating with a surface sizing agent and a moisture resistant chemical on CK paper showed the best result. Therefore this method was recommended to produce the outer liner board for water resistant corrugated board.

Manufacture of Water-Resistant Corrugated Board Boxes for Agricultural Products in the Cold Chain System

  • Jo, Jung-Yeon;Min, Choon-Ki;Shin, Jun-Seop
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2006.06b
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    • pp.459-463
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    • 2006
  • For the purpose of developing liner board for water-resistant corrugated board in the cold chain system, several types of base paper for corrugated board were purchased from the market and 6 different boards were produced in the paperboard mill by applying the chemicals on the base paper. Then, water-moisture resistant performance and physical properties of the boards were evaluated and compared each other. The liner board which is dried at high temperature with pressure by the Condebelt showed a superior performance in strength over conventional liner boards. Strength of the board increased by surface chemical treatment up to 60% of compressive strength and 30% of bursting strength. Starch insolubilization with Ammonium-Zirconium -Carbonate and surface coating with a surface size and a moisture resistant chemical on CK paper showed the best result. Therefore, this method was recommended to produce the outer liner board for water -resistant corrugated board.

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Manufacture of Water-Resistant Corrugated Board Boxes for Agricultural Products in the Cold Chain System

  • Jo, Jung-Yeon;Min, Choon-Ki;Shin, Jun-Seop
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.44 no.2
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    • pp.29-34
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    • 2012
  • For the purpose of developing liner board for water-resistant corrugated board in the cold chain system, several types of base paper for corrugated board were purchased from the market and 6 different boards were produced in the paperboard mill by applying the chemicals on the base paper. Then, water-moisture resistant performance and physical properties of the boards were compared each other. The liner board which is dried at high temperature with pressure by Condebelt papermaking system(CK paper) showed a superior performance in strength over common liner boards. Strength of the board increased by surface chemical treatment up to 60% of compressive strength and 30% of bursting strength. Starch insolubilization with Ammonium-Zirconium Carbonate(AZC) and surface coating with a surface size and a moisture resistant chemical on CK paper showed the best result. Therefore, this method was recommended to produce the outer liner board for water -resistant corrugated board.

Studies for Processing Condition Optimization and Physicochemical Property of Resistant Starch (난소화성 전분 제조공정의 최적화 및 이화학적 특성 연구)

  • 한명륜;김우경;강남이;이수정;김명환
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.8
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    • pp.1193-1199
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    • 2003
  • As a result of resistant starch yield depending on heating temperature, moisture content, storage temperature and heating-cooling cycle with RSM (response surface methodology), high amylose corn starch (46%) was appeared higher than normal corn starch in the yield (22%). At the high amylose corn starch, optimum conditions for resistant starch formation were 6 times of heating-cooling cycle, 108$^{\circ}C$ heating temperature and 67% moisture content at the 2$0^{\circ}C$ storage temperature, which resulted in 25% yield with these experiment conditions. Affecting factor for the resistant starch formation was arranged according to heating -cooling cycle, moisture content, heating temperature and storage temperature. Raw corn starch granule was destructive and appeared a porous reticular structure by the resistant starch formation. Color became dark and increased yellowness by caramelization during heating processing. Heating-cooling processing was the result of decreased hardness, cohesiveness, springiness and gumminess.

Study on Quality of Yukwa by Substitution with Resistant Starch (저항전분 대체에 따른 유과의 품질에 관한 연구)

  • Lee, Mi Hye;Oh, Myung Suk
    • Journal of the East Asian Society of Dietary Life
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    • v.26 no.5
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    • pp.407-417
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    • 2016
  • Effects of resistant starch as a functional substitute on the quality of Yukwa were determined. Replacement ratios of resistant starch were 2, 4, and 6% of glutinous rice flour. Regarding pasting properties of Yukwa dough replaced with resistant starch, initial pasting temperature significantly increased and peak viscosity significantly decreased with increasing resistant starch. The moisture contents of bandegi and Yukwa base replaced with resistant starch were higher than that of the control. The expansion ratio of Yukwa base replaced with resistant starch significantly decreased with increasing resistant starch, and there were no significant differences in the oil absorption ratio. Lightness (L) of Yukwa base replaced with resistant starch increased significantly with increasing resistant starch. Appearance of Yukwa base replaced with resistant starch showed a shortened length and increased width with increasing resistant starch, and cross-section showed an oval shape, fine air cell distribution, and increased outer layer thickness. Hardness and peak number increased significantly with increasing resistant starch. The overall acceptability of Yukwa base replaced with 6% resistant starch was the highest among the samples, but the result was not significant. The above results show that resistant starch substitution in Yukwa improved the texture and further could improve health functionality due to its dietary fiber content. Resistant starch was appropriate as a 6% replacement for glutinous rice flour in Yukwa.

Monitoring and Analysis of Moisture Contents for Traditional and New-styled Hanoks (전통한옥과 신한옥의 함수율 모니터링 및 분석)

  • Kim, Yeong-Min
    • Journal of the Architectural Institute of Korea Structure & Construction
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    • v.34 no.3
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    • pp.29-36
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    • 2018
  • In this study, the moisture contents of four Hanoks have been monitored and the results were analyzed. Murujeong and Ongojae were built by traditional construction method and material, and Jeeshinjae and Hwakyeongdang were built by modernized construction method and material. Hwakyeongdang was monitored about 2 years and 9 months and the other three Hanoks were monitored about 4 years and 2 months. The surface moisture contents were measured by the non-destructive electronic resistant type moisture content meter. The measured moisture contents were affected by the orientation to the sun, wood type, temperature and relative humidity. The columns on the northern side and lumber showed more moisture contents than those of the southern side and glue-laminated wood. The moisture contents and relative humidity showed proportional relationship. The moisture contents of all four monitored Hanoks existed proper range by and large.

Manufacture of Water-Resistant Corrugated Board Boxes for Agricultural Products in the Cold Chain System(I) - Effects of Fiber Types, Wet Strength Agents and a Moisture-Proof Chemical on the Physical Properties of Base Papers for Corrugated Board Boxes - (농산물 저온유통용 내수 골판지 상자의 제조 (제1보) -섬유의 종류, 습윤지력증강제 및 방습제 첨가에 따른 골판지 원지의 물리적 특성 -)

  • 조중연;민춘기;신준섭
    • Journal of Korea Technical Association of The Pulp and Paper Industry
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    • v.35 no.2
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    • pp.26-32
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    • 2003
  • For the purpose of manufacturing water-resistant corrugated board boxes for agricultural products in the cold chain system, the effects of fiber types, wet strength agents and a moisture-proof chemical on the properties of the base papers were investigated first. PAE(polyamide amine epichlorohydrin) showed better performance than MF(melamine formalde-hyde) over broad stock pH ranges, which was prefered as wet strength agent for the paper grade. When short fibers(AOCC, KOCC) were mixed with long fiber(UKP) in certain ratios, some physical properties of the paper made with mixed fibers were similar to those of the paper made with UKP only. Paper containing AOCC showed the biggest increase in water resistance when PAE was added to the stock. Synergistic effects in moisture-proof and some mechanical properties of paper were appeared when PAR was added internally, together with the coating of a moisture proof chemical on the sheets.

Liquid Moisture Management and Surface Properties of the Fabric in Transient Condition (작업복 소재 직물의 액상 수분 전달 특성 및 표면특성 연구)

  • 유신정
    • Journal of the Korean Society of Clothing and Textiles
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    • v.25 no.1
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    • pp.61-70
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    • 2001
  • As important factors determining human sensorial comfort, liquid moisture management and surface properties of heat resistant workwear materials were examined. To figure out liquid moisture management properties of the test materials, absorption capacity, rate of absorption, and evaporation properties were assessed. A modified GATS(Gravimetric Absorbency Testing System) was used to measure the liquid moisture accumulation associated with the wicking of liquid moisture from sweating skin. The GATS procedure measures demand wettability of materials to take up liquid in a direction perpendicular to the fabric surface and it was modified to incorporate a special test cell and cover to assess absorption behavior in the presence of evaporation. Fabric stiffness, smoothness, number and the length of surface fibers, and an estimate of the contact area between the skin and fabric surface were measured to characterize the mechanical and surface properties of the test materials. Also an estimate of the force with which a fabric clings to moist skin was made using as wet-cling index.

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