本試驗目的在探討不同廢紙再生纖維之鹼性上膠適性及提升再生纖維上膠度之方法。結果發現AKD較ASA適合再生纖維之鹼性上膠。未經脫墨之再生纖維，因其中含有印墨，可能阻擋上膠化學反應之進行，上膠效果較差。碳酸鈣的添加及氫氧化鈉溶液的處理二者皆有助於AKD上膠效果之提升。再生纖維上膠溫度以40℃最佳，過高或過低均導致上膠效果降低。此外，接觸角是上膠效率分析中的一項重要變數，本研究以數學模式推導為基礎加以計算並討論。
Since near 80% of the raw material for paper production in Taiwan is recycled fibers, researches on recycled fibers can directly contribute to our paper industry. The objective of this study is to investigate the feasibility of alkaline sizing with different recycled fibers and to compare the sizing results with that of virgin fibers. Additionally, this research attempts to improve the outcomes of alkaline sizing with recycled fibers by adding calcium carbonate pigment, adjusting the sizing temperature, and performing alkali treatment before the sizing procedures. Experimental results indicate that AKD is a better alkaline size than ASA and rosin size for recycled fibers. Moreover, deinking treatment is found as a prerequisite for an effective alkaline sizing with recycled fibers. Furthermore, both the presence of calcium carbonate and the practice of alkali treatment improve the handsheet's sizing results. The sizing temperature should be controlled at 40aC for optimum results, either lower or higher temperatures would not promote the sizing performance. Finally, the contact angle which is a significant variable for paper sizing analysis has been calculated and presented in this report through the technique of mathematical modeling.
