改性酚醛树脂在OCC浆中的应用及其增强机理

通过苯酚、甲醛与二乙烯三胺反应，得到阴离子性的酚醛树脂，并将改性的酚醛树脂作为造纸增强剂应用在抄纸过程。结果表明，单独使用改性酚醛树脂时增强效果不显著；改性酚醛树脂和阳离子淀粉共同使用能有效提高纸张的抗张指数和环压指数。通过对改性酚醛树脂和阳离子淀粉用量的优化得到最佳使用条件，即改性酚醛树脂和阳离子淀粉用量分别为0．3％和0．7％，纸张的抗张指数和环压指数分别增加了35．28％和26.50％。由改性酚醛树脂增强机理的试验结果表明，改性酚醛树脂能使浆料在加入阳离子淀粉的情况下分散更均匀；改性酚醛树脂和阳离子淀粉能有效提高纤维之间的结合强度。

Study on Application and Strengthening Mechanism of Modified Phenol-Formaldehyde Resin in OCC Pulp

An anionic phenol-formaldehyde resin which synthesized by phenol, formaldehyde and diethylene triamine was studied in this paper, and this modified phenol-formaldehyde resin was used in papermaking as an intensifier. The trial result showed that adding the modified phenol-formaldehyde resin alone, the strength enhancing efficiency was not noteworthy. Tensile index and ring crush index could be greatly enhanced by using modified phenol-formaldehyde resin and cationic starch meanwhile; through the application trial, getting the optimum dosage of modified phenol-formaldehyde resining and C-starch were 0.3% and 0.7%, and then, tensile index and ring crush index were increased by 35.28% and 26.50%. From studied on strengthening mechanism of modified phenol-formaldehyde resin, it is showed that the fiber dispersed more uniform from added the resin; modified phenol-formaldehyde resin and cationic starch could efficiently increase the honding strength of fibers.