Silica gel sponge and preparation method thereof

The invention relates to a silica gel sponge and a preparation method thereof. The silica gel sponge comprises the following components in percentage by weight: 15-40% of coarse mesh polyurethane sponge and 60-85% of double-component addition type silica gel, the coarse mesh polyurethane sponge comprises the following components in parts by weight: 100 parts of polyether polyol, 35-42 parts of isocyanate, 0.3-0.5 part of a foam stabilizer, 8.5-9.5 parts of a foaming agent, 0.3-0.5 part of a reaction catalyst and 1-2 parts of a sterilizing, mite-killing and mildew-proof agent. The bi-component addition type silica gel comprises a component A and a component B, and the mass ratio of the component A to the component B is 1: 1. The silica gel sponge product disclosed by the invention has the physical properties of high temperature washing resistance, skin friendliness, breathability, softness, comfort, extremely high tearing strength and extremely low permanent deformation, so that the product prepared from the s