DMF・DMAC・DMSO

 

DMF : 二甲基甲酰胺
DMAC:二甲基乙酰胺
DMSO: 二甲基亞砜
這些被廣泛用作溶劑。

DMF在一般情況下可能是一個陌生的名字,但它經常用於合成腈綸和作為濕法紡絲的溶劑。也用作人造革和聚氨酯合成革的溶劑。

DMF・DMAC・DMSO

案例分析
(人造革加工)

無紡布

浸漬

混凝罐

洗滌

乾燥

混凝罐

檢查DMF 溶液的濃度

DMF在人造革製造中用作聚氨酯的溶劑。首先,用含有表面活性劑等的水基水溶液浸漬無紡布。接著,將其浸漬在凝固槽內的DMF溶液中,進行氨基甲酸酯化反應。由於前道工序中水的引入,混凝罐中的DMF 溶液逐漸變稀。濃度控制很重要,因為當DMF 水溶液的濃度變低時,質量會受到影響。固化工序中的DMF水溶液通過回收裝置進行再利用,但也有在回收裝置中內置折射率計的情況。人造革的製造方法因應用而異,浸漬過程中可使用DMF 溶液。由於凝固浴中的DMF 溶液從上一步逐漸用水稀釋,因此DMF 水溶液的濃度控制很重要,因為它的質量會影響濃度。混凝過程中的DMF 溶液通過回收系統進行回收,在某些情況下,回收系統中內置折光儀。人造革的生產方法因應用而異,在浸漬過程中可以使用DMF 溶液過程。

案例分析

DMF等也用於橡膠手套的製造過程。在清洗罐的濃度控制中安裝了一個在線儀表,以確認DMF 在最終清洗線中已完全去除。考慮到環境和健康,我們管理數值以確認有無去除。

案例分析
(人造革加工)

無紡布

浸漬

洗滌

乾燥

混凝罐

檢查DMF 溶液的濃度

DMF is used as a solvent for polyurethane in the production of artificial leather. First, a non-woven fabric is impregnated with a water-based aqueous solution containing a surfactant. Then, it is dipped in a DMF solution in a coagulation bath to undergo urethane formation reaction. Since the DMF solution in the coagulation bath is gradually diluted with water from the previous step, the concentration control of the DMF aqueous solution is important because its quality affects the concentration. The DMF solution in the coagulation process is recycled through the recovery system, and in some cases, a refractometer is built into the recovery system.The method of producing artificial leather varies depending on the application, and a DMF solution may be used in the impregnation process.

Case

DMF is also used in the manufacturing process of rubber gloves. An in-line meter is installed in the wash tank concentration to ensure that DMF has been removed completely in the final wash process to monitor concentration. For an environmental and health standpoint as well, it is important to measure and monitor numerically whether the removal is complete.