1, different materials: silica gel is a highly active adsorption material, usually transparent or milky white solid; PU is a new type of material, which belongs to recyclable and environmentally friendly materials. It is often yellowish or white.
2. Different uses: Silica gel is mainly used to make sealing rings, tableware, medical devices, etc. PU is mainly used to make insoles, soles and clothes.
3. Different characteristics: silica gel has the characteristics of high temperature resistance, corrosion resistance, non-toxic and tasteless, while PU has the characteristics of good elasticity, wear resistance and waterproof.