| 초록 |
Dry Strength Agent plays an important role in corrugated Paper Board production. Its main function is to increase the dry strength by strengthening the inter-fiber bonds. Strength is most important for paper board in order to contain and protect various content. Hamzeh, et al. (2012) showed that the dry strength properties of recycled old corrugated carton (occ) pulp could be improved by adding various polymers. In this study we try to adding value of occ pulp by mixing with unbleached softwood kraft pulp and adding 5 type of polymers into it. The ratio of occ and softwood pulp is 7:3, while the concentration of each polymers raging from 0,1 to 0,5%. For better results, we also compare the samples by adding 1% of sizing agent and 0,3 % of binding agent. pH, turbidity, and chemical oxygen demand are analyzed. Furthermore, the physical properties are evaluated such as tensile strength, burst strength, rind crush, and cobb test. |
