• 펄프종이기술
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• 제47권5호
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• pp.134-140
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• 2015

This study was carried out to evaluate whether EVAc, acryl latex and biobinder could substitute the part of SB latex for pre-coating color formula or not. Different coating colors prepared through the substitution of 30% SB latex with EVAc, acryl latex, and biobinder were applied for pre-coating layer. 100% SB latex is used as a binder for top coating color. The optical properties, gloss, roughness, stiffness, dry- and wet-pick strength were measured. There were no significant differences in the brightness, whiteness, opacity, roughness, ink set-off and gloss of paper coated with 5 different coating colors. However the stiffness, dry- and wet-pick strength were somewhat lower than those of conventional coating color which 100% SB latex was used as a binder. Although the part of SB latex could be substituted with EVAc, acryl latex and biobinder without sacrificing the qualities of coated paper. Further researches on the improvement of stiffness, dry- and wet-pick strength, and the optimization of rheology of coating color in order to improve the qualities of coated paper are strongly recommended.

• Elastomers and Composites
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• 제35권3호
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• pp.196-204
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• 2000

방수제로 사용하는 EVA 에멀젼 수지에 라텍스 형태의 아크릴 수지, 에폭시 수지, 우레탄 수지, SBR 수지를 전체 혼합물 중에 $0{\sim}50%$ 혼합하여 소포성, 기계적 물성, 내수성 등을 조사하였다. 소포제의 소포효과는 BYK-021이 가장 우수하였으며 적절한 사용량은 전체 혼합물에 대하여 0.3phr이었다. 수축율은 수지간의 상용성과 기공형성도에 영향을 받았으며 기계적 강도는 수지 분자간의 응집력, 수지와 시멘트의 결합력, 시멘트 입자간의 응집력 등에 영향을 받았다. 라텍스를 혼합한 것은 혼합하지 않은 것보다 수축율, 굴곡강도, 접착강도, 충격강도 등에서 우수한 물성을 나타내었다. EVA에 시멘트를 혼합했을 때에는 혼합하지 않았을 때보다 내수성이 떨어졌다.

• 펄프종이기술
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• 제47권5호
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• pp.141-146
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• 2015

This study was carried out to elucidate the partial substitutability of SB latex with environmental-friendly coating binders for coated paper. Starch-based biobinder, ethylene vinyl acetate and acryl-based binder were evaluated for this purpose. Several combinations of above binders were applied to top layer coating, and properties of coating colors and printability were evaluated. When 20% and 30% of SB latex were substituted by acryl-based synthetic binder, ethylene vinyl acetate and biobinder, the brightness, whiteness and opacity of coated paper were similar to those obtained from SB latex. Ink set and stiffness of coated paper manufactured through 20% and 30% substitution of SB latex by biobinder and EVAc were improved, but dry- and wet-pick strength were decreased. The research works on the improvement of dry- and we-pick strength, mechanical stability and rheological properties at high shear condition should be continued for the commercial application of biobinder, EVAc and acryl-based binder.

• Elastomers and Composites
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• 제33권5호
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• pp.324-334
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• 1998

방수재로 사용하는 EVA 에멀젼 수지에 라텍스 형태의 아크릴 수지, 에폭시 수지, 우레탄 수지, SBR 수지를 $0{\sim}50%$ 혼합하여 점성, 건조특성, 경도 등을 실험하였다. 점도는 라텍스함량 20%까지는 현저하게 떨어졌고 그 이상에서는 유사한 점도를 나타내었는데 점도에 가장 영향을 미치는 것은 EVA 수지와의 상용성이었다. 가사시간은 혼합 후 $30{\sim}40분$ 이내인 것으로 나타났는데 가사시간에 가장 영향을 미치는 요인은 시멘트와의 반응성이었다. 지촉건조시간은 에폭시>SBR>우레탄>아크릴의 순서로 나타났는데 수지의 종류와 시멘트의 양에 따라 다른 특성을 나타내었다. 라텍스 혼합물의 경도는 연필경도 $4B{\sim}H$를 나타내었는데 시멘트를 충전했을 때 현저하게 높은 경도를 나타내었다.

• KSBB Journal
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• 제8권4호
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• pp.320-327
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• 1993

스티렌/아크렬 라텍스 폴리머를 폴리에릴렌이민으 로 표면처 리하여 얻은 PEI-microspheres는 그 표면 화학적 특성이 효소의 고정화에 적합하여 배당체의 합성반응에 서 필요로 하는 alginate-enclosed micro­s spheres biocatalyst를 제조할 수 있었고 라텍스 폴리머 표변에 형성된 폴리에틸렌이민 피막은 효소 부근에 친수성 분위기를 유지하여 높은 효소활성을 나 타내었을 뿐만 아니라, 생성된 배당체가 효소에 접 근하여 가수분해되는 반응을 억제하여 배당체의 수 율과 농도를 크게 증가시 켰으므로 alginate-en closed microspheres에 의한 배당체의 합성반응이 연속생산공정으로 연구개발 될 수 있다.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2011년도 춘계학술발표회 논문집
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• pp.327-338
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• 2011

This study was carried in order to manufacture the high quality coated paper. High quality includes not only properties of coated paper but also final print quality. In this study, new acrylic-styrene emulsion was polymerized in laboratory and compared with styrene-butadiene latex. Low-shear viscosity of coating color was decreased with increasing acrylic-emulsion dosage. WRV was increased with addition and decreased with substitution of acrylic-emulsion. Paper gloss, brightness and whiteness were increased and PPS and opacity was slightly decreased with acrylic-emulsion. Ink gloss was increased with using No. 3 acrylic-emulsion due to lower ink setting properties. However No.1, 2 emulsion shows opposite situation. Surface strength of coated paper was increased with using No. 3 acrylic-emulsion These results indicate that high quality coated paper can be manufactured with using No. 3 acrylic-emulsion.

• 한국세라믹학회지
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• 제38권2호
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• pp.122-127
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• 2001

수열법으로 합성한 헥토라이트 점토(SHC), 아크릴 라텍스 및 코팅첨가제들을 배합하여 성분이 다른 수성코팅제(WBC-0, WBC-1, WBC-2) 3종류를 제조하였다. 제조한 수성코팅제(WBC)의 pH, 용액점도 및 고형분을 조사하였고, 전단력에 따른 유동성을 레오메타로 측정하였다. 또한 WBC로부터 주조된 필름의 열안정성과 투명성을 각각 TGA와 UV-VIS 분광광도계로 조사하였다. SHC가 8 phr 포함된 WBC-2는 전단력에 따라 졸과 겔의 상전이 현상, 즉 요변성을 나타내었으며 이로 인해 저장안정성이 우수하였다. 주조한 WBC-1과 WBC-2 필름의 초기분해온도와 투명성은 시판 WBC(OP-55W)의 필름보다 각각 99.6~110.2$^{\circ}C$와 20.9~21.7%의 범위로 증가하였다. 결과적으로, SHC가 함유된 WBC는 수팽윤성 점토에 의해 내열성과 용액점도의 증대효과가 나타났다.

• 패션비즈니스
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• 제12권5호
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• pp.77-93
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• 2008

The purpose of the study was to examine make-up expression elements of horror characters as an evil spirit, a vampire, a zombie, a monster and a psycho murderer through make-up, focused on horror movies of the United States after1960s. First, an evil spirit was expressed that the pupil grew dim without a focus and the skin was torn by going bad and rot completely. Also, it was expressed that its teeth was changed to pointed canine teeth as a wild beast and its pale and bloodless face showed blood vessels clearly. To express its bloodless and pale skin, air brush was swept into the skin over several times. Its canine tooth was made acryl powder into its shape and was harden to make its shape smooth. Also, it was colored to show people like the real thing. Second, a vampire was expressed by make-up elements as long nails, a sharp canine tooth, a pale skin with a blood vessel and dead eyes. Its rough skin and long nails were manufactured with latex foam, which was colored like the skin. Third, a monster image as a werewolf was expressed by make-up elements as fur, sharp teeth, changed nails and toenails, a rough skin and a face changed to a wolf. Rubber mask and rubber body suit were manufactured as a make-up of special character and so all its body was changed. Fourth, a psycho murderer and body-deformed man were expressed by make-up elements as a distorted mask, swelled-up and deformed skull and face form, terribly deformed body, discolored and hang down skin and teeth with an indeterminate form. Its body and face were manufactured by the foam latex technology according to make-up design as a make-up of special character.

• 한국염색가공학회지
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• 제35권3호
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• pp.151-158
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• 2023

In this study, we investigated the durability properties of the recycled leather using shaving scrap with antioxidant. Recycled leather sheets were manufactured by mixing shaving scrap and NB latex as a binder. HALS(Hindered Amine Light Stabilizer) and UVA(UV absorbers) were used as antioxidant. Mechanical properties such as hardness, tensile strength, elongation, tear strength and abrasion resistance were measured. Light aging resistance was evaluated using UV lamp and the degree of discoloration of the recycled leather sheets using a gray scale. In addition, to evaluate heat aging and UV aging, the degree of discoloration of the recycled leather sheets over time was measured using colorimeter. Washing fastness was evaluated on the degree of dyeing of recycled leather sheets for six type of multi-fiber woven fabrics (Acetate, Cotton, Nylon-66, Polyester, Acryl, Wool). To determine whether hazardous substances were detected in recycled leather sheets, the contents of arylamine and Cr 6⁺ were evaluated. As a result, when used in combination with antioxidant, the heat aging and light aging of recycled leather were improved and hazardous substance were not detected.