頁籤選單縮合
題 名 | 構樹皮樹脂障礙之克服 |
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作 者 | 谷雲川; 王國財; | 書刊名 | 林業試驗所研究報告季刊 |
卷 期 | 2:3 1987.09[民76.09] |
頁 次 | 頁199-209 |
分類號 | 476.2 |
關鍵詞 | 克服; 構樹皮; 障礙; 樹脂; |
語 文 | 中文(Chinese) |
中文摘要 | 構樹皮為製造高級書畫用紙之良好材料,但存在有因樹脂而產生的不 吸墨白斑點,嚴重影響紙之品質,本試驗分析臺灣熟白皮及泰國生白皮之化學組 成,並對此樹脂障礙提出有效的解決方法。於NaOH蒸煮液中添加 Na2CO3, 或螯合劑時,可減輕樹脂障礙,並可提高收率及降低紙漿Ka-ppa 值。去除樹脂 最有效且根本的方法為添加樹脂分散劑,而樹脂分散劑之種類,使用量、HLB 值,配合比例及使用方式等皆對去樹脂效果有所影響,當使用得當時,樹脂去除 率可達95%以上,製造的紙張不復有不吸墨白斑點之困擾。 |
英文摘要 | Paper mulberry bark is one of the best raw materials for handmade paper used in the field of chinese painting and calligraphy. Resin pitch which causes ink- repellent spots is the well-known problem of the sheets made from paper mulberry bast fibers. The chemical composition of the barks imported from Tailand and produced in Taiwan is analysed and the recommended control methods to combat pitch problems are outlined. The addition of sodium triphosphate which play the part of sequestrant or sodium carbonate in caustic soda digestion is effective in decreasing the resin extractives of pulps. They also have the advantages of increasing the yield and lowering the kappa number of pulps. The application of resin dispersants is the most effective method to solve pitch problems. There are several ways in which dispersants control resin problems. Dispersant molecules adsorb at the resin/water interface and can stabilize pitch particles through charge and/or steric repulsion phenomena. In addition, dispersants tend to soften and dissolve resin deposits already formed; solubilization and redispersion of resin stabilized by the dispersants are processes in the removal of resin. There are many factors such as the types, the doses, the HLB values, the ratios and the application forms of dispersants by which the efficiency of resin removal is affected. When the suitable conditions are applied, the resin removed from barks is more than 95% and the ink-repellent spots are no longer appeared in the sheets made from 100% paper mulberry bast fibers. |
本系統中英文摘要資訊取自各篇刊載內容。