DMF・DMAC・DMSO

 

DMF : 二甲基甲酰胺
DMAC:二甲基乙酰胺
DMSO: 二甲基亚砜
这些被广泛用作溶剂。

DMF在一般情况下可能是一个陌生的名字,但它经常用于合成腈纶和作为湿法纺丝的溶剂。也用作人造革和聚氨酯合成革的溶剂。

DMF・DMAC・DMSO

案例分析
(人造革加工)

无纺布

浸渍

混凝罐

洗涤

干燥

混凝罐

检查 DMF 溶液的浓度

DMF在人造革制造中用作聚氨酯的溶剂。首先,用含有表面活性剂等的水基水溶液浸渍无纺布。接着,将其浸渍在凝固槽内的DMF溶液中,进行氨基甲酸酯化反应。由于前道工序中水的引入,混凝罐中的 DMF 溶液逐渐变稀。浓度控制很重要,因为当 DMF 水溶液的浓度变低时,质量会受到影响。 固化工序中的DMF水溶液通过回收装置进行再利用,但也有在回收装置中内置折射率计的情况。人造革的制造方法因应用而异,浸渍过程中可使用 DMF 溶液。 由于凝固浴中的 DMF 溶液从上一步逐渐用水稀释,因此 DMF 水溶液的浓度控制很重要,因为它的质量会影响浓度。混凝过程中的 DMF 溶液通过回收系统进行回收,在某些情况下,回收系统中内置折光仪。人造革的生产方法因应用而异,在浸渍过程中可以使用 DMF 溶液过程。

案例分析

DMF等也用于橡胶手套的制造过程。在清洗罐的浓度控制中安装了一个在线仪表,以确认 DMF 在最终清洗线中已完全去除。考虑到环境和健康,我们管理数值以确认有无去除。

案例分析
(人造革加工)

无纺布

浸渍

洗涤

干燥

混凝罐

检查 DMF 溶液的浓度

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.