Case Study
(Artificial Leather Processing)
Non-Woven Fabric
Impregnation
Washing
Drying
Coagulation Tank
DMF Concentration Check
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.
Case Study
(Artificial Leather Processing)
ys
DMF : Dimethylformamide
DMAC:Dimethylacetamide
DMSO: Dimethylsulfoxide
These are widely used as solvents.
Dimethylformamide (DMF) may be unfamiliar name but it is very much used in the acrylic fiber forming and as a solvent for wet spinning. It is also used as a solvent for artificial leather and urethane-based synthetic leather.