Polyurethane resin binders can endow the film better flexibility and mechanical strength, and can fasten the coating particles on the surface of the fabric fiber.In the printing ink and paste coating, using waterborne blocked hardener too, when the closed end group isocyanate unsealed, can occur cross-linking reaction with the hydroxyl in the fiber, and the large molecule repeat unit contains active hydrogen, and the molecule itself does not react isocyanate base form transactions, further improve the color printing fastness.The sealing waterborne polyurethane has higher requirements in preparation process, and the selection of the sealing agent and the amount of sealing rate directly affect its performance. There are not many reports on relevant studies in China, and there are few products on the market, more of which are acrylic modified waterborne polyurethane products.

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