| abstract |
The invention provides a preparation system of polyurethane elastic fiber. The preparation system includes: an MDI storage tank and a PTMG storage tank for storing the basic raw liquid required for preparation, and the MDI storage tank and the PTMG storage tank are connected to the MDI storage tank and the PTMG storage tank through double liquid inlet joints. The polymerization reactor connected to the discharge end of the tank at the same time, the prepolymer storage tank connected to the liquid outlet joint of the polymerization reactor, and the chain extension reactor set at the discharge end of the prepolymer storage tank, set at the liquid outlet of the chain extension reactor At the end of the spinning device, the polymerization reactor is a microchannel continuous polymerization reactor, which is mainly used to prepare high-strength polyurethane elastic fibers. |