Slow-resilience sponge with air permeability and hardness easy to adjust and preparation method of slow-resilience sponge

The invention discloses slow-rebound sponge with air permeability and hardness easy to adjust and a manufacturing method. Raw materials for preparing the slow-rebound sponge with air permeability and hardness easy to adjust are composed of polyether polyol, polymer polyol, modified isocyanate, an organosilicon surfactant, a catalyst, a foaming agent and an alcohol amine chain extender. The organosilicon surfactant is composed of two kinds of silicone oil. The two kinds of silicone oil are open-cell silicone oil and closed-cell silicone oil respectively, and the open-cell property of the foam is adjusted by adjusting the proportion of the open-cell silicone oil and the closed-cell silicone oil so as to achieve the purpose of adjusting the air permeability. And meanwhile, the hardness of the slow-rebound sponge is adjusted by adjusting the polyether polyol with four degrees of functionality. According to the slow-rebound sponge, the hardness of the prepared slow-rebound sponge is adjusted by adjusting the polye