Method for preparing novel foaming thermoplastic polyurethane elastomer material
A technology of plastic polyurethane and elastomer materials, which is applied in the field of preparation of foamed thermoplastic polyurethane elastomer materials, can solve the problems affecting the yield, shrinkage of molded products, and lower density of molded products, and achieve low production cost, pollution-free process, The effect of solving material application problems
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[0022] See figure 1 , figure 1 It is a flowchart of the first embodiment of the preparation method of the novel foamed thermoplastic polyurethane elastomer material (new F-TPU material) of the present invention. The preparation method includes the following steps:
[0023] In step S21, the component A is introduced into the feed end of the first single-screw extruder through a metering tank to perform a pre-polymerization reaction. The component A includes a polyester polyol, a crosslinking agent and an isocyanate;
[0024] Step S22, adding component B at the discharge end of the first single-screw extruder and introducing the reacted component A into the feeding end of the second screw extruder, wherein component B includes: catalyst, foaming aid Agent, water, surfactant, triisocyanate, sulfur promoter and foaming agent;
[0025] In step S23, the A component and the B component are polymerized under the extrusion of the second screw extruder, and are extruded from the discharge end...
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