The effect of component mixing order and proportion of pigments on the properties of coating color and coating layer | |
| Author | Vu Huu Hieu |
| Call Number | AIT Thesis no.PP-05-02 |
| Subject(s) | Paper coatings Pigments |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | Pigmented coatings are applied on paper or paperboard to improve final product properties such as brightness, opacity, print quality. Coating formulations consist of a dispersed pigment phase and a dissolved binder phase with water as a vehicle. Coating colors also contain small amount of other additives, like dispersant and thickener. The performance of a coating is determined by general characteristics, such as viscosity, water retention, zeta potential, optical and surface strength of coated paper. The objective of this study was to find out the effects of coating component mixing order and mixing ratios of ground calcium carbonate and kaolin clay on the properties of coating color and coating layer. The results show that, the proportion of pigments and mixing order of coating component influence low shear rate viscosity, water retention, and zeta potential of coating colors. Viscosity as well as water retention decreased while zeta potential increased remaining negative all the time when percentage of ground calcium carbonate increased from 0 to 100 parts of coating pigments. During the study it was found that changing mixing order of chemicals resulted in properties of coated paper. The differences from using changing component mixing order influence coating surface properties, such as optical properties and dry pick resistance. Controlling these properties enables to produce coated papers of higher quality. |
| Year | 2005 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Pulp and Paper Technology (PP) |
| Chairperson(s) | Lehtinen, Esa K. ; |
| Examination Committee(s) | Malinen, Raimo O. ;Nazhad, Mousa M.; |
| Scholarship Donor(s) | Government of Finland ;AIT Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2005 |