Analysis and Application of Upgrading Characteristics of Water-based Flexographic Printing Ink
| Autor: | 黃晨洋 HUANG,CHEN-YANG, 黃晨洋 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 Water-based ink is the main raw material used to replace traditional volatile organic solvents; it is also the only non-toxic ink approved by the U.S. Food and Drug Administration. It is mainly used in food and medicine, and is packaged and printed under strict conditions. As an important component of water-based printing inks, resin emulsions directly affect the performance of the inks. In this study, three kinds of acrylic resin emulsion and four kinds of alcohol additive were used to improve the performance of printing inks. The resin emulsions were all acrylic resin emulsions, and they had different glass transition temperatures (Tg) and viscosities. Different kinds of resin emulsion were mixed in varying proportions with different alcohol additives to make water-based inks, and the adhesion, viscosity and surface tension of the inks were measured. To examine the effects of water-based inks on stretched polypropylene film (OPP), water-based inks meeting the printing requirements were prepared through experiments, and reference inks from the printing industry were also obtained. The experimental results showed that resin emulsion A had the best adhesion. The viscosity and surface tension were adjusted by adding resin emulsion B or C. 1-propanol effectively reduced the surface tension, but increased the viscosity, while propylene glycol effectively improved adhesion and reduced the surface tension. Glycerin reduced adhesion, and polyethylene (PVA) effectively improved adhesion, but agglomeration occurred when the content exceeded 3 %. The optimum mixing ratio was 40 % of resin emulsion A, 60 % of resin emulsion C, and 3 % PG, which resulted in an adhesion of 98 %, a viscosity of 9.36 s, and a surface tension of 42.38 mN/m. In comparison, 80 % of resin emulsion A, 20 % of resin emulsion B, and 3 % propanol resulted in an adhesion of 99.30 %, a viscosity of 9.11 s, and a surface tension of 41.72 mN/m. Key words: Water-based ink, acrylic resin emulsion, adhesion, viscosity, surface tension |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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