Features: 1. The density is 1.4-2.0g/cm3. 2. It can form products with complex structure at one time, and can realize the presetting of reinforcing ribs, variable thickness and connecting parts. 3. High precision brought by high integration, as well as reduction of mold cost and assembly cost. 4. The formula can be adjusted quickly to adapt to more special occasions, such as combustion, deformation, heat resistance, and chemicals. 5. The surface is smooth and clean, can achieve the A side effect